One-way prefill valve

Abstract

The invention relates to a matched valve body of engineering machinery, in particular to a one-way prefill valve which comprises a valve body of a three-dimensional square structure, and a one-way valve, a control valve, a main valve, an oil inlet channel P, an oil return channel T, a bypass channel O and an execution channel B are arranged in the valve body; the oil inlet channel P is communicated with the one-way valve and the main valve, the control valve is communicated with the main valve and the one-way valve, the main valve is communicated with the bypass channel O, and the one-way valve is communicated with the execution channel B; the device is small in size and modularized, production and assembly of equipment are facilitated, and the requirement for refined production of the equipment is met.

Description

Technical Field

[0001] The invention relates to a valve body matched with engineering machinery, in particular to a single-way liquid-filling valve. Background Art

[0002] As the tonnage of construction machinery increases, the oil demand and pressure requirements of the actuators are also increasing. The hydraulic system is an important component of it. At the same time, as the requirements for the precision of the execution of actions by construction machinery become higher and higher, the design requirements for its internal hydraulic components are getting higher and higher. Among them, the single-way filling valve is one of the hydraulic components, which can effectively distribute the heavy hydraulic oil of the hydraulic system. Due to the continuous improvement of the design requirements for hydraulic components, the existing filling valves are large in size and inconvenient to install during the assembly of the equipment, and cannot meet the existing refined production requirements.

[0003] Therefore, there is an urgent need for a new type of single-way filling valve, which is small in size and modular in format, easy to produce and assemble the equipment, and meets the requirements for refined production of the equipment. Summary of the invention

[0004] The present invention provides a single-way liquid filling valve, which is compact and modular, and is convenient for production and assembly of equipment, thus meeting the requirements for refined production of equipment.

[0005] The present invention adopts the following technical solution:

[0006] A single-way liquid filling valve comprises a valve body with a three-dimensional square structure, wherein a one-way valve, a control valve, a main valve, an oil inlet channel P, an oil return channel T, a bypass channel O and an execution channel B are arranged inside the valve body; the oil inlet channel P is respectively connected to the one-way valve and the main valve, the control valve is respectively connected to the main valve and the one-way valve, the main valve is connected to the bypass channel O, and the one-way valve is connected to the execution channel B.

[0007] Furthermore, the main valve is a spool-type oil-leakage logic valve, and the control valve is an internal-leakage control valve.

[0008] Furthermore, a first plug communicating with the oil inlet channel P, a second plug communicating with the main valve, and a third plug communicating with the execution channel B are respectively provided on the side wall of the valve body.

[0009] Preferably, the control valve includes a load-relief housing body, a sliding cavity and an installation cavity provided in the load-relief housing body, a seat for separating the sliding cavity and the installation cavity and provided on the inner side wall of the load-relief housing body, a first sliding body sleeved inside the sliding cavity, a sphere provided on the seat, a block with a cross-shaped cross section abutting against the sphere, and a first compression spring sleeved on the block and provided inside the installation cavity; the load-relief housing body is provided with a first oil inlet hole communicating with the sliding cavity in both the length direction and the radial direction, the first sliding body is provided with a first oil inlet channel adapted to the first oil inlet hole in the radial direction; the load-relief housing body is provided with a first oil outlet hole communicating with the installation cavity in the radial direction. The main valve includes an oil drain housing body, a second oil inlet hole provided in the length direction of the oil drain housing body, a second oil outlet hole provided in the radial direction of the oil drain housing body, a second sliding body sleeved inside the oil drain housing body, and a second compression spring sleeved inside the oil drain housing body and abutting against the second sliding body. The one-way valve comprises a valve body shell body, a third oil inlet hole opened in the length direction of the valve body shell body, a third oil outlet hole opened in the radial direction of the valve body shell body and a third sliding body sleeved inside the valve body shell body.

[0010] Preferably, in order to facilitate fixed installation of the device, a plurality of installation holes are opened through the valve body.

[0011] From the above description of the structure of the present invention, it can be seen that compared with the prior art, the present invention has the following advantages: the present invention has a compact structure and a small size, which is not only convenient for assembly and production, but also convenient for downstream users to install equipment, improves production efficiency, has a high degree of integration, and meets the requirements of refined production of equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The hydraulic principle diagram of the present invention

[0013] Figure 2 A three-dimensional schematic diagram of the present invention Figure 1 ;

[0014] Figure 3 A three-dimensional diagram of the present invention Figure 2 ;

[0015] Figure 4 A three-dimensional schematic diagram of the present invention Figure 3 ;

[0016] Figure 5 A three-dimensional diagram of the present invention Figure 4 ;

[0017] Figure 6 Explosion diagram of the present invention Figure 1 ;

[0018] Figure 7 Explosion diagram of the present invention Figure 2 ;

[0019] Figure 8 Explosion diagram of the present invention Figure 3 ;

[0020] Fig. 9 Explosion diagram of the present invention Figure 4 ;

[0021] Fig.10 It is a schematic exploded frame diagram of the present invention;

[0022] Fig.11 It is a partial cross-sectional view of the present invention;

[0023] Fig.12 The present invention is a cutaway perspective diagram Figure 1 ;

[0024] Fig.13 The present invention is a cutaway perspective diagram Figure 2 ;

[0025] Fig.14 The present invention is a cutaway perspective diagram Figure 3 ;

[0026] Fig.15 The present invention is a cutaway perspective diagram Figure 4 ;

[0027] Fig.16 It is a three-dimensional schematic diagram of the main valve of the present invention;

[0028] Fig.17 It is a sectional perspective schematic diagram of the main valve of the present invention;

[0029] Fig.18 It is a three-dimensional schematic diagram of the control valve of the present invention;

[0030] Fig.19 It is a cross-sectional perspective schematic diagram of the control valve of the present invention;

[0031] Explanation of the accompanying drawings: valve body 1, mounting hole 11, one-way valve 2, valve body shell body 21, third oil inlet hole 211, third oil outlet hole 212, third sliding body 22, control valve 3, unloading shell body 31, first oil inlet hole 311, first oil outlet hole 312, sliding chamber 32, mounting chamber 33, seat 34, first sliding body 35, first oil inlet channel 351, ball 36, block 37, first compression spring 38, main valve 4, second plug 401, oil drain shell body 41, second oil inlet hole 411, second oil outlet hole 412, second sliding body 42, second compression spring 43, oil inlet channel P5, first plug 51, return oil channel T6, bypass channel O7, execution channel B8, third plug 81. DETAILED DESCRIPTION

[0032] The specific embodiments of the present invention will be described below with reference to the accompanying drawings.

[0033] See also Figures 1 to 19 A single-way filling valve includes a valve body 1 in a three-dimensional square structure, wherein a check valve 2, a control valve 3, a main valve 4, an oil inlet channel P5, an oil return channel T6, a bypass channel O7 and an execution channel B8 are arranged inside the valve body 1, and the execution channel B8 includes two channels; the oil inlet channel P5 is connected to the check valve 2 and the main valve 4 respectively, the control valve 3 is connected to the main valve 4 and the check valve 2 respectively, the main valve 4 is connected to the bypass channel O7, and the check valve 2 is connected to the execution channel B8. The main valve 4 adopts a spool-type oil leakage logic valve, and the control valve 3 adopts an internal leakage control valve 3.

[0034] In order to facilitate subsequent equipment modification and upgrading, a first plug 51 connected to the oil inlet channel P5, a second plug 401 connected to the main valve 4, and a third plug 81 connected to one of the execution channels B8 are respectively provided on the side wall of the valve body 1.

[0035] See also Figures 16 to 19 The control valve 3 includes a load-relief housing body 31, a sliding cavity 32 and an installation cavity 33 arranged in the load-relief housing body 31, a holder 34 with a circular funnel-shaped structure and used to separate the sliding cavity 32 and the installation cavity 33 and arranged on the inner side wall of the load-relief housing body 31, a first sliding body 35 sleeved inside the sliding cavity 32, a ball 36 abutting against the holder 34, a block 37 abutting against the ball 36 and having a cross-shaped cross-section, and a first compression spring 38 sleeved on the block 37 and arranged inside the installation cavity 33; the load-relief housing body 31 is provided with a first oil inlet hole 311 communicating with the sliding cavity 32 in both the length direction and the radial direction, and the first sliding body 35 is provided with a first oil inlet channel 351 adapted to the first oil inlet hole 311 in the radial direction; the load-relief housing body 31 is provided with a first oil outlet hole 312 communicating with the installation cavity 33 in the radial direction. The main valve 4 includes an oil drain housing body 41, a second oil inlet hole 411 opened in the length direction of the oil drain housing body 41, a second oil outlet hole 412 opened in the radial direction of the oil drain housing body 41, a second sliding body 42 sleeved inside the oil drain housing body 41, and a second compression spring 43 sleeved inside the oil drain housing body 41 and abutting against the second sliding body 42. The one-way valve 2 includes a valve body housing body 21, a third oil inlet hole 211 opened in the length direction of the valve body housing body 21, a third oil outlet hole 212 opened in the radial direction of the valve body housing body 21, and a third sliding body 22 sleeved inside the valve body housing body 21.

[0036] See also Figures 2 to 5 In order to facilitate the fixed installation of the device, two installation holes 11 are formed through the valve body 1 .

[0037] The above is only a specific implementation of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial changes to the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. A single-way liquid filling valve, comprising a valve body in a three-dimensional square structure, characterized in that: A one-way valve, a control valve, a main valve, an oil inlet channel P, an oil return channel T, a bypass channel O and an execution channel B are arranged inside the valve body; the oil inlet channel P is communicated with the one-way valve and the main valve respectively, the control valve is communicated with the main valve and the one-way valve respectively, the main valve is communicated with the bypass channel O, and the one-way valve is communicated with the execution channel B.

2. A one-way filling valve according to claim 1, characterized in that: The main valve is a spool-type oil-draining logic valve, and the control valve is an internal-draining control valve.

3. A one-way filling valve according to claim 1 or 2, characterized in that: The side walls of the valve body are respectively provided with a first plug communicating with the oil inlet passage, a second plug communicating with the main valve, and a third plug communicating with the execution passage.

4. A one-way filling valve according to claim 1 or 2, characterized in that: The control valve includes a load-reducing housing body, a sliding cavity and an installation cavity arranged in the load-reducing housing body, a seat for separating the sliding cavity and the installation cavity and arranged on the inner side wall of the load-reducing housing body, a first sliding body sleeved inside the sliding cavity, a sphere abutting on the seat, a clamping block with a cross-shaped cross-section abutting against the sphere, and a first compression spring sleeved on the clamping block and arranged inside the installation cavity; the load-reducing housing body is provided with a first oil inlet hole connected to the sliding cavity in both the length direction and the radial direction, and the first sliding body is provided with a first oil inlet channel adapted to the first oil inlet hole in the radial direction; the load-reducing housing body is provided with a first oil outlet hole in the radial direction that is connected to the installation cavity.

5. A one-way filling valve according to claim 1 or 2, characterized in that: The main valve includes an oil drain housing body, a second oil inlet hole opened in the length direction of the oil drain housing body, a second oil outlet hole opened in the radial direction of the oil drain housing body, a second sliding body sleeved inside the oil drain housing body, and a second compression spring sleeved inside the oil drain housing body and abutting against the second sliding body.

6. A one-way filling valve according to claim 4, characterized in that: The main valve includes an oil drain housing body, a second oil inlet hole opened in the length direction of the oil drain housing body, a second oil outlet hole opened in the radial direction of the oil drain housing body, a second sliding body sleeved inside the oil drain housing body, and a second compression spring sleeved inside the oil drain housing body and abutting against the second sliding body.

7. A one-way filling valve according to claim 6, characterized in that: The one-way valve comprises a valve body shell body, a third oil inlet hole opened in the length direction of the valve body shell body, a third oil outlet hole opened in the radial direction of the valve body shell body and a third sliding body sleeved inside the valve body shell body.

8. A one-way liquid filling valve according to claim 1, 2 or 7, characterized in that: The valve body is provided with a plurality of mounting holes.

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