Push rod liquid inlet system for three telescopic brackets

Abstract

The present invention discloses a push rod liquid inlet system suitable for a three-telescopic bracket, comprising a push rod and a base. The bracket's main inlet and return liquid hard pipe is arranged inside the push rod and integrated with the push rod. The front and rear ends of the main inlet and return liquid hard pipe open at the upper part of the push rod, respectively, and are provided with a front interface and a rear interface, respectively. The bracket's main inlet and return liquid rubber hose is installed in the cable trough of the scraper conveyor, and an outlet is added through a tee at the notch of the cable trough, and is connected to the front interface via a high-pressure rubber hose; the rear interface is connected to a filter or an electro-hydraulic control reversing valve via a high-pressure rubber hose. The front interface is raised and the rear interface is lowered, and high-strength plates and high-strength hard pipes are used, and the thickness of the push rod is reduced to accommodate the characteristics of the three-telescopic bracket's large pulling force and pushing force. This solves the awkward situation of having nowhere to place the multi-pass block or main inlet and return liquid stop valve of the three-telescopic bracket, achieves a perfect integration of the main inlet and return liquid hard pipe and the push rod, and frees up space for the arrangement of other main and auxiliary valves and high-pressure rubber hoses.

Description

Technical Field

[0001] The invention relates to a hydraulic support column for coal mines, in particular to a push rod liquid inlet system suitable for a three-telescopic support. Background Art

[0002] Existing support columns generally use double telescopic columns, and a very small number of supports use single telescopic columns. For the shielded hydraulic supports with double telescopic columns and single telescopic columns, the ratio of the maximum height to the minimum height of the support is small, the arrangement of the main and auxiliary valves and hoses of the hydraulic system is relatively easy, and the relative movement distance between the various components is small.

[0003] For the shield-type hydraulic support with three telescopic columns, the various layout positions in the highest state will be compressed together in the lowest state, resulting in tight layout positions of the main and auxiliary valves and hoses of the hydraulic system. When the columns are extended to the highest point, all the main and auxiliary valves and hoses must be in the expanded position, and there must be no obstruction in this process. These two points lead to a sharp increase in the difficulty of arranging the hydraulic system of the three telescopic supports. Summary of the Invention

[0004] The purpose of the present invention is to provide a push rod liquid inlet system suitable for three telescopic supports.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] The push rod liquid inlet system of the present invention is suitable for a three-telescopic bracket, including a push rod and a base. The main liquid inlet and return hard pipe of the bracket is arranged inside the push rod and integrated with the push rod. The front end and rear end of the main liquid inlet and return hard pipe are respectively opened at the upper part of the push rod and are respectively provided with a front end interface and a rear end interface.

[0007] It can be seen from the technical solution provided by the present invention described above that the push rod liquid inlet system suitable for a three-telescopic bracket provided in an embodiment of the present invention breaks through the inertial thinking limitation of ordinary brackets using multi-way blocks or stop valves, and solves the embarrassing situation that the multi-way blocks or main inlet and return liquid stop valves of the three-telescopic brackets have nowhere to be placed. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 A schematic diagram of the overall structure of a push rod liquid inlet system suitable for a three-telescopic bracket provided in an embodiment of the present invention.

[0009] Figure 2 Schematic diagram of the pipeline connection of the push rod liquid inlet system according to an embodiment of the present invention.

[0010] Figure 3 Schematic diagram of the hydraulic principle of the push rod liquid inlet system of an embodiment of the present invention.

[0011] In the picture:

[0012] 1. Push rod, 2. Base, 3. Front interface, 4. Rear interface, 5. High-pressure hose, 6. Cable trough for scraper conveyor, 7. Main inlet and return hose. DETAILED DESCRIPTION

[0013] The following is a further detailed description of the embodiments of the present invention. The contents not described in detail in the embodiments of the present invention belong to the prior art known to those skilled in the art.

[0014] The push rod liquid inlet system of the present invention is applicable to three telescopic brackets, and its preferred embodiment is:

[0015] It includes a push rod and a base. The main liquid inlet and return hard pipe of the bracket is arranged inside the push rod and integrated with the push rod. The front end and rear end of the main liquid inlet and return hard pipe are respectively opened at the upper part of the push rod and are respectively provided with a front end interface and a rear end interface.

[0016] The main liquid inlet and return hose of the bracket is installed in the cable trough of the scraper conveyor, and an outlet is added through a tee at the notch of the cable trough, and is connected to the front end interface through a high-pressure hose;

[0017] The rear end interface is connected to a filter or an electro-hydraulic controlled reversing valve via a high-pressure hose.

[0018] The front-end interface is higher than the back-end interface. Specific embodiment:

[0020] like Figures 1 to 3 As shown, the push rod is installed at the lower part of the middle gear of the base. The push rod adopts an integrated method inside the push rod to integrate the main liquid inlet and return hard pipes of the bracket into one body with the push rod. In order to adapt to the characteristics of the three telescopic brackets, the front interface is raised and the rear interface is lowered. High-strength plates and high-strength hard pipes are used, and the thickness of the push rod is reduced to adapt to the characteristics of the three telescopic brackets with large pulling force and pushing force.

[0021] The main inlet and return liquid hose of the bracket is installed in the cable trough of the scraper conveyor, and an outlet is added through a tee at the notch of the cable trough, leading to the front interface in front of the push rod. The interface behind the push rod is connected to a high-pressure hose, and then connected to a filter or an electro-hydraulic controlled reversing valve through the high-pressure hose.

[0022] The present invention breaks through the inertial thinking limitation of ordinary brackets using multi-way blocks or main inlet and return liquid stop valves. When the layout positions of the hydraulic main and auxiliary valves and high-pressure hoses at the lowest position of the three-telescopic bracket are extremely tight, the present invention solves the embarrassing situation that there is nowhere to place the multi-way blocks or main inlet and return liquid stop valves of the three-telescopic brackets, realizes the perfect integration of the main inlet and return liquid hard pipes and the push rod, and makes room for the layout positions of other main and auxiliary valves and high-pressure hoses.

[0023] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A push rod liquid inlet system suitable for a three-telescopic bracket, comprising a push rod and a base, characterized in that: The main liquid inlet and return pipe of the bracket is arranged inside the push rod and integrated with the push rod. The front end and rear end of the main liquid inlet and return pipe are respectively opened at the upper part of the push rod and are respectively provided with a front end interface and a rear end interface; The main liquid inlet and return hose of the bracket is installed in the cable trough of the scraper conveyor, and an outlet is added through a tee at the notch of the cable trough, and is connected to the front end interface through a high-pressure hose; The rear end interface is connected to a filter or an electro-hydraulic controlled reversing valve via a high-pressure hose; The front-end interface is higher than the back-end interface.

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