Priority valve of loading machine

Abstract

The utility model belongs to the technical field of priority valves, and particularly relates to a loader priority valve which comprises a priority valve body, an oil outlet nozzle is connected to the left side of the priority valve body, an external three-way pipeline is fixedly mounted on the oil outlet nozzle, an inner piston is slidably mounted in a second pipeline in the three-way pipeline, and an extension rod is fixedly connected to the top end of the inner piston. And the other end of the extension rod penetrates through the third pipeline of the three-way pipeline and is fixedly connected with a reciprocating lifting seat. In the utility model, the inner piston is positioned in the second pipeline at the beginning, the oil outlet nozzle of the priority valve is communicated with the third pipeline to form a flow channel, and when maintenance is needed, the flow channel can be switched to another flow channel, namely the oil outlet nozzle is communicated with the second pipeline, and the inner piston is moved into the third pipeline at the moment; therefore, the priority valve can be maintained under the condition that the priority valve is not stopped, application is more flexible, and whether an oil outlet nozzle or a three-way pipeline breaks down or not can be analyzed easily.

Description

Technical Field

[0001] The utility model relates to a priority valve, in particular to a loader priority valve. Background Art

[0002] As a multi-purpose engineering machinery, loaders can be used for short-distance loading and unloading, transporting materials required for engineering operations, and can also be used for rough leveling and cleaning of sites. The priority valve is mainly a component that controls the direction on the loader. In the steering pump and working pump confluence system, when there is no steering, or the steering cylinder only needs less oil, the excess oil output by the steering pump is merged into the working oil flow to increase the movement speed of the working cylinder. Moreover, this is achieved under the premise of giving priority to the steering cylinder, so that steering is fully effective in any case to ensure safety. The priority valve plays the role of giving priority to the steering system.

[0003] For example, the patent with authorization announcement number CN219639163U discloses a loader priority valve that is convenient for installing oil pipes, including a priority valve body and a first oil outlet nozzle, the first oil outlet nozzle is installed on the outer wall of the priority valve body, and one end of the first oil outlet nozzle extends to the interior of the priority valve body, the second oil outlet nozzle is installed on the outer wall of the priority valve body away from the first oil outlet nozzle, and one end of the second oil outlet nozzle extends to the interior of the priority valve body, the top of the first oil outlet nozzle is provided with an upper gland, the bottom of the first oil outlet nozzle below the upper gland is provided with a lower gland, the interior of the lower gland is provided with a first bolt, and the top of the first bolt extends to the interior of the upper gland. The utility model not only realizes the convenient and firm installation of the loader priority valve on the oil pipe, improves the convenience of oil pipe installation and the solidity of connection, but also facilitates the connection of multiple oil pipes with the loader priority valve. Although the above technology has many advantages, it still has defects: the oil pipe of the loader priority valve needs to be repeatedly disassembled and assembled during maintenance or maintenance, and the disassembly and assembly process needs to be stopped to complete, which reduces the benefits it brings. Utility Model Content

[0004] The main purpose of the present disclosure is to provide a loader priority valve to effectively solve the problems raised by the inventor in the above background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] A loader priority valve comprises a priority valve body, wherein the left side of the priority valve body is connected with an oil outlet nozzle, an external three-way pipeline is fixedly installed on the oil outlet nozzle, an inner piston is slidably installed in the second pipeline in the three-way pipeline, an extension rod is fixedly connected to the top of the inner piston, the other end of the extension rod passes through the third pipeline of the three-way pipeline and is fixedly connected with a reciprocating lifting seat, the size of the reciprocating lifting seat is smaller than the size of the pipe mouth of the three-way pipeline, and the inner diameters of the second pipeline and the third pipeline of the three-way pipeline are the same.

[0007] Preferably, a vertical screw rod parallel to the extension rod is rotatably mounted on the outer shell of the priority valve body, a slide plate is threadedly mounted on the vertical screw rod, a limit rod parallel to the vertical screw rod is fixedly connected to the priority valve body, and the slide plate is slidably sleeved on the limit rod, the side surface of the slide plate is connected to the reciprocating lifting seat through a connecting assembly, and a quick-shift handle is fixedly connected to the top end of the vertical screw rod.

[0008] Preferably, the connection assembly includes an electric telescopic rod and an embedded block, the electric telescopic rod is fixedly mounted on the side of the skateboard, and the output end of the electric telescopic rod is fixedly connected to the embedded block, a connecting groove is opened on the side of the reciprocating lifting seat, and the embedded block slides into the connecting groove.

[0009] Preferably, a maintenance port is provided on a side of the three-way pipeline away from the oil outlet nozzle, and a sealing cover is installed on the maintenance port through a flange seal.

[0010] In view of this, compared with the prior art, the beneficial effects of the utility model are:

[0011] (i) In the present application, the inner piston is initially located in the second pipeline, at which time the oil outlet of the priority valve is connected to the third pipeline to form a flow channel. When maintenance or servicing is required, it can be switched to another flow channel, that is, the oil outlet is connected to the second pipeline. At this time, the inner piston is moved into the third pipeline, so that the priority valve can be maintained without stopping the machine, which is more flexible in application and it is easy to analyze whether there is a fault in the oil outlet or the three-way pipeline.

[0012] (ii) In the present application, when switching channels, the quick-shift handle on the vertical screw is rotated to move the slide plate downward along the limit rod, thereby driving the reciprocating seat downward, so that the extension rod pushes the inner piston and slides into the third pipeline, and then the rotation of the vertical screw is stopped, so that the oil outlet nozzle is connected to the second pipeline of the three-way pipeline. The switching action is simple and easy to control. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The figure shows a schematic diagram of the structure of the loader priority valve provided by the utility model;

[0014] Figure 2 Shown Figure 1 Schematic diagram of the internal structure of the middle three-way pipeline;

[0015] Figure 3 Shown Figure 1 A top view of the middle slide;

[0016] Figure 4 Shown Figure 2 Schematic diagram of the middle reciprocating lifting seat after it moves down;

[0017] Figure 5Shown is an exploded view of the connection between the reciprocating lifting seat and the embedded block.

[0018] icon:

[0019] 1-priority valve body; 101-oil outlet nozzle; 2-three-way pipeline; 3-inner piston; 4-extension rod; 5-reciprocating lifting seat; 6-vertical screw; 601-quick-moving handle; 7-limit rod; 8-slide plate; 9-electric telescopic rod; 10-embedded block; 11-flange; 12-sealing cover. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-5 , the utility model provides the following embodiments:

[0022] A loader priority valve comprises a priority valve body 1, an oil outlet nozzle 101 is connected to the left side of the priority valve body 1, an external three-way pipeline 2 is fixedly installed on the oil outlet nozzle 101, an inner piston 3 is slidably installed in the second pipeline in the three-way pipeline 2, an extension rod 4 is fixedly connected to the top of the inner piston 3, the other end of the extension rod 4 passes through the third pipeline of the three-way pipeline 2 and is fixedly connected to a reciprocating lifting seat 5, the size of the reciprocating lifting seat 5 is smaller than the size of the pipe mouth of the three-way pipeline 2, and the inner diameters of the second pipeline and the third pipeline of the three-way pipeline 2 are the same.

[0023] Specifically, a vertical screw 6 parallel to the extension rod 4 is rotatably installed on the outer shell of the priority valve body 1, and a slide plate 8 is threadedly installed on the vertical screw 6. A limit rod 7 parallel to the vertical screw 6 is fixedly connected to the priority valve body 1, and the slide plate 8 is slidably sleeved on the limit rod 7. The side of the slide plate 8 is connected to the reciprocating lifting seat 5 through a connecting assembly, and the top of the vertical screw 6 is fixedly connected to a quick-moving handle 601.

[0024] Specifically, the connecting component includes an electric telescopic rod 9 and an embedded block 10. The electric telescopic rod 9 is fixedly installed on the side of the slide plate 8, and the output end of the electric telescopic rod 9 is fixedly connected to the embedded block 10. A connecting groove is opened on the side of the reciprocating lifting seat 5, and the embedded block 10 slides into the connecting groove. The electric telescopic rod 9 can drive the embedded block 10 to move left and right, and then it can be moved out of or into the connecting groove of the reciprocating lifting seat 5, so that the installation of the two is simple and fast.

[0025] Specifically, a maintenance port is provided on the side of the three-way pipeline 2 away from the oil outlet nozzle 101, and a sealing cover 12 is installed on the maintenance port through a flange 11. The flange 11 can be removed to perform maintenance and other operations on the three-way pipeline 2, and the sealing of the three-way pipeline 2 is guaranteed.

[0026] The specific implementation of this embodiment is as follows: initially, the inner piston 3 is located in the second pipeline (three-way pipeline 2), and at this time, the oil outlet nozzle 101 of the priority valve is connected to the third pipeline to form a flow channel. When maintenance or repair is required, it can be switched to another flow channel, that is, the oil outlet nozzle 101 is connected to the second pipeline, and at this time, the inner piston 3 is moved into the third pipeline, so that the priority valve can be maintained without stopping the machine, and the application is more flexible, and it is easy to analyze whether the oil outlet nozzle 101 or the three-way pipeline 2 is faulty;

[0027] When switching channels, the quick-moving handle 601 on the vertical screw 6 is turned to move the slide plate 8 downward along the limit rod 7, thereby driving the reciprocating seat 5 to move downward, so that the extension rod 4 pushes the inner piston 3 and slides into the third pipeline, and then the rotation of the vertical screw 6 is stopped, so that the oil outlet nozzle 101 is connected to the second pipeline of the three-way pipeline 2. Figure 4 As shown, the switching action is simple and easy to control.

[0028] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0029] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A loader priority valve, characterized in that: The utility model comprises a priority valve body (1), wherein the left side of the priority valve body (1) is connected to an oil outlet nozzle (101), an external three-way pipeline (2) is fixedly installed on the oil outlet nozzle (101), an inner piston (3) is slidably installed in the second pipeline in the three-way pipeline (2), an extension rod (4) is fixedly connected to the top of the inner piston (3), the other end of the extension rod (4) passes through the third pipeline of the three-way pipeline (2) and is fixedly connected to a reciprocating lifting seat (5), and the size of the reciprocating lifting seat (5) is smaller than the size of the pipe mouth of the three-way pipeline (2); A vertical screw rod (6) parallel to the extension rod (4) is rotatably mounted on the outer shell of the priority valve body (1), a slide plate (8) is threadedly mounted on the vertical screw rod (6), a limit rod (7) parallel to the vertical screw rod (6) is fixedly connected to the priority valve body (1), and the slide plate (8) is slidably sleeved on the limit rod (7), and the side surface of the slide plate (8) is connected to the reciprocating lifting seat (5) through a connecting component; The connection assembly comprises an electric telescopic rod (9) and an embedding block (10); the electric telescopic rod (9) is fixedly mounted on the side of the slide plate (8), and the output end of the electric telescopic rod (9) is fixedly connected to the embedding block (10); a connecting groove is provided on the side of the reciprocating lifting seat (5), and the embedding block (10) slides into the connecting groove.

2. A loader priority valve according to claim 1, characterized in that: A quick-moving handle (601) is fixedly connected to the top end of the vertical screw rod (6).

3. A loader priority valve according to claim 1, characterized in that: A maintenance port is provided on the side of the three-way pipeline (2) away from the oil outlet nozzle (101), and a sealing cover (12) is sealedly mounted on the maintenance port via a flange (11).

4. A loader priority valve according to claim 1, characterized in that: The inner diameters of the second pipeline and the third pipeline of the three-way pipeline (2) are the same.

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