Pilot oil source valve with novel filtering device

Abstract

A pilot oil source valve with a novel filtering device comprises a pilot oil source valve body, an energy accumulator, an electromagnetic directional valve, an overflow valve, a one-way valve and a pressure measuring connector are integrated on the pilot oil source valve body, an oil inlet of the pilot oil source valve body is arranged on a valve body in an inward concave mode, a filter is arranged in the oil inlet of the pilot oil source valve body, a filter screen is arranged on the filter, and the pressure measuring connector is connected with the filter screen. And an inner hexagonal hole convenient to disassemble is formed in the filter. According to the pilot oil source valve with the novel filter device, the filter device is integrated in the valve body by directly adopting a form of integrating the filter screen at the oil inlet of the pilot oil source valve, so that the overall structural size of the pilot oil source valve is effectively reduced, the structure is simple, the economical efficiency is good, and meanwhile, different specifications can be selected according to the size of an oil port; and the function of filtering the pilot oil liquid is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering machinery, in particular to a novel filtering device and a pilot oil source valve. Background Art

[0002] In the hydraulic system of engineering machinery, a pilot hydraulic system is usually set up. The hydraulic components in the pilot hydraulic system are usually integrated on the pilot oil source valve. The pilot oil source valve generally integrates several components such as electromagnetic reversing valve, accumulator, one-way valve, overflow valve, pressure measuring joint, and filter. The principle and layout structure are designed according to the needs of the hydraulic system. The working pressure of the pilot hydraulic system is relatively low, generally below 6MPa, and it mainly provides the pilot oil source for the main valve.

[0003] Currently, the existing pilot oil source valves and filters generally have the following disadvantages: 1. Standard plate-type or plug-in filters are installed on the valve body of the pilot oil source valve to achieve the filtering function of the pilot system. This structure has a large installation space and high cost of the entire valve. 2. The versatility is not strong. The size and specifications of filters from different manufacturers are inconsistent, and the interchangeability is poor. Summary of the invention

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the above-mentioned prior art and provide a new type of filtering device and pilot oil source valve with simple structure and good effect.

[0005] The utility model is realized by the following technical scheme: a pilot oil source valve with a novel filtering device, comprising a pilot oil source valve, on which an accumulator, an electromagnetic reversing valve, a relief valve, a one-way valve and a pressure measuring joint are integrated, the oil inlet of the pilot oil source valve is arranged on a valve body in a concave form, a filter is arranged in the oil inlet of the pilot oil source valve, a filter screen is arranged on the filter, and the filter is provided with a hexagonal hole for easy disassembly.

[0006] The invention further comprises: the filter is connected to the bottom of the oil inlet of the pilot oil source valve.

[0007] The bottom of the oil inlet of the pilot oil source valve is an end close to the valve body.

[0008] The upper end of the filter is provided with a hexagonal hole, and the lower end of the filter is a threaded end. The filter is connected to the oil inlet of the pilot oil source valve through threads, and the size of the threaded end matches the threads of the oil inlet of the pilot oil source valve.

[0009] The size of the threaded end is determined according to the thread size of the oil inlet of the pilot oil source valve.

[0010] The utility model has the following advantages: the pilot oil source valve with a novel filtering device of the utility model directly adopts the form of an integrated filter screen at the oil inlet of the pilot oil source valve, and the filtering device is integrated inside the valve body, which effectively reduces the overall structural size of the pilot oil source valve, has a simple structure, and is economical. At the same time, different specifications can be selected according to the size of the oil port to achieve the function of filtering the pilot oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation on the present invention. Obviously, the accompanying drawings described below are only some embodiments. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0012] In the attached picture:

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 It is the hydraulic principle diagram of the utility model;

[0015] Figure 3 This is the front view of the filter of the utility model;

[0016] Figure 4 It is a top view of the filter of the utility model.

[0017] In the figure: 1. filter, 2. pilot oil source valve, 3. threaded end, 4. hexagon socket hole, 5. filter screen.

[0018] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0020] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They 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 direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] like Figures 1 to 4 A pilot oil source valve with a novel filtering device is shown, comprising a pilot oil source valve 2, on which an accumulator, an electromagnetic reversing valve, a relief valve, a one-way valve and a pressure measuring joint are integrated, the oil inlet of the pilot oil source valve 2 is arranged in a concave form on the valve body, a filter 1 is arranged in the oil inlet of the pilot oil source valve 2, a filter screen 5 is arranged on the filter 1, and a hexagonal hole 4 for easy disassembly is provided on the filter 1. The utility model discloses a pilot oil source valve with a novel filtering device, wherein the pilot oil source valve integrates an accumulator, an electromagnetic reversing valve, a relief valve, a non-return valve, a pressure measuring joint and other components at the same time. The oil inlet P of the pilot oil source valve is arranged inside the valve body, and the filter is installed in the P port. The inner hexagon of the filter can facilitate the dark rotation and disassembly of the filter. A filter screen is integrated under the filter to filter impurities in the medium. When in use, the oil of the pilot oil source valve enters through the oil inlet P port. The filter functions to filter the oil entering through the oil inlet P port to prevent impurities from entering other hydraulic components through the oil, thereby causing the pilot oil source valve to fail in function.

[0023] like Figure 3 A pilot oil source valve with a novel filtering device is shown, wherein the filter 1 is connected to the bottom of the oil inlet of the pilot oil source valve 2. The bottom of the oil inlet of the pilot oil source valve 2 is one end close to the valve body. The filter of the utility model is arranged at the bottom of the oil inlet of the pilot oil source valve, and under the support of the valve body, the connection is reliable and can resist the impact of hydraulic oil.

[0024] like Figure 1 to Figure 2A pilot oil source valve with a novel filtering device is shown, wherein the upper end of the filter 1 is provided with a hexagonal hole 4, and the lower end of the filter 1 is a threaded end 3. The filter 1 is connected to the oil inlet of the pilot oil source valve 2 through a thread, and the size of the threaded end 3 matches the thread of the oil inlet of the pilot oil source valve 2. The size of the threaded end 3 is determined according to the thread size of the oil inlet of the pilot oil source valve 2. The filter of the utility model is an integral structure, with threads on the outside and hexagonal holes on the inside, which is convenient for screwing into the valve body and also convenient for disassembly; the filter is installed at the bottom of the P port, and the size of the filter connection thread can be designed according to the size of the P port, and the thread specification is kept the same as that of the P port, so that it is convenient to pass through the P port and screw into the valve body.

[0025] The pilot oil source valve with a novel filtering device of the utility model simplifies the filter structure and is directly installed inside the valve body by means of threads, which effectively reduces the volume of the installation space and greatly reduces the cost; it adopts a threaded screw-in structure and is installed inside the oil inlet of the pilot oil source valve body, and the parts can be repaired and processed only by unscrewing and disassembling them from the oil port, which greatly enhances the maintainability and saves maintenance costs; by changing the connecting thread specifications, it is suitable for different threaded oil port specifications and can be applied to pilot oil source valves of any structural form, with strong expandability.

[0026] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0027] In addition, those skilled in the art will understand that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments also means being within the scope of protection of the present utility model and forming different embodiments. For example, in the above embodiments, those skilled in the art can use them in combination according to the known technical solutions and the technical problems to be solved by the present application.

[0028] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model has been disclosed as a preferred embodiment as above, it is not used to limit the utility model. Any technician familiar with this patent can make some changes or modify the technical content suggested above into an equivalent embodiment with equivalent changes without departing from the scope of the technical solution of the utility model. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the content of the technical solution of the utility model still falls within the scope of the solution of the utility model.

Claims

1. A pilot oil source valve with a new type of filtering device, characterized in that: The pilot oil source valve (2) comprises an accumulator, an electromagnetic reversing valve, a relief valve, a check valve and a pressure measuring joint integrated thereon; the oil inlet of the pilot oil source valve (2) is arranged on the valve body in a concave form; a filter (1) is arranged in the oil inlet of the pilot oil source valve (2); a filter screen (5) is arranged on the filter (1); and a hexagonal hole (4) is arranged on the filter (1) for easy disassembly.

2. A pilot oil source valve with a novel filtering device as claimed in claim 1, characterized in that: The filter (1) is connected to the bottom of the oil inlet of the pilot oil source valve (2).

3. A pilot oil source valve with a novel filtering device as claimed in claim 1, characterized in that: The bottom of the oil inlet of the pilot oil source valve (2) is an end close to the valve body.

4. A pilot oil source valve with a novel filtering device as claimed in claim 1, characterized in that: The upper end of the filter (1) is provided with a hexagonal hole (4), and the lower end of the filter (1) is a threaded end (3). The filter (1) is connected to the oil inlet of the pilot oil source valve (2) via threads, and the size of the threaded end (3) matches the thread of the oil inlet of the pilot oil source valve (2).

5. A pilot oil source valve with a novel filtering device as claimed in claim 4, characterized in that: The size of the threaded end (3) is determined according to the thread size of the oil inlet of the pilot oil source valve (2).

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