Hydraulic pilot type spring-free automatic unloading valve of mining water cutting machine

Abstract

The utility model discloses a hydraulic pilot-operated type spring-free automatic unloading valve of a mining water cutting machine. A pilot-operated type automatic unloading device of the mining water cutting machine is composed of a valve body, a left side O-shaped ring, an unloading K-shaped connector, a valve seat O-shaped ring, an alloy valve seat, an alloy valve element, an alloy valve element seat, a right side O-shaped ring, a pilot-operated K-shaped connector, a connecting sleeve, a valve element seat O-shaped ring, an unloading hole and other components.

Description

Technical Field

[0001] The utility model relates to a hydraulic pilot type springless automatic unloading valve for a mining water cutting machine, in particular to an automatic unloading device which is not equipped with a spring and utilizes liquid pressure to remotely control the closing and opening of a valve core. Background Art

[0002] At present, most of the unloading valves used in underground water jet cutting machines in coal mines are manual spring-type unloading valves. During frequent use, the spring elasticity of such unloading valves is easily reduced, resulting in leakage of the unloading valve, affecting the normal use of the water jet cutting machine. However, there is currently no automatic unloading device that does not require a spring and can be controlled by liquid pressure to solve this problem. Summary of the invention

[0003] The utility model is to solve a series of problems that "most of the unloading valves used in water cutting machines in coal mines are manual spring-type unloading valves. During frequent use, the spring elasticity of such unloading valves is easily reduced, resulting in leakage of the unloading valve, affecting the normal use of the water cutting machine; however, there is currently no automatic unloading device that does not require a spring and can be controlled by liquid pressure." A hydraulic pilot-type springless automatic unloading device for a water cutting machine used in mines is proposed.

[0004] The purpose of this utility model is achieved through the following technical solutions:

[0005] A hydraulic pilot type springless automatic unloading valve for a mining water cutting machine comprises a valve body 1, a left O-ring 2, an unloading K-type joint 3, a valve seat O-ring 4, an alloy valve seat 5, an alloy valve core 6, an alloy valve core seat 7, a right O-ring 8, a pilot K-type joint 9, a connecting sleeve 10, a valve core seat O-ring 11, and an unloading hole 12; the characteristics are as follows: the valve seat O-ring 4 is sleeved on the alloy valve seat 5, the alloy valve seat 5 is installed on the left side of the valve body 1, and the left O-ring 2 is sleeved on the unloading The load K-type joint 3 is screwed on the left side of the valve body 1; the alloy valve core 6 and the alloy valve core seat 7 are screwed together, the valve core seat O-ring 11 is sleeved on the alloy valve core seat 7, and then the alloy valve core seat 7 is installed in the valve body 1; the right O-ring 8 is sleeved on the left end of the connecting sleeve 10, the pilot K-type joint 9 is screwed on the right end of the connecting sleeve 10, and then the connecting sleeve 10 is tightened to the right end of the valve body 1, forming a pilot type automatic unloading device for mining water cutting machine.

[0006] In order to further achieve the purpose of convenient control operation, a relief K-type connector 3 and a pilot K-type connector 9 are installed on the valve body 1, which are easy to install and disassemble during use.

[0007] The utility model has the following advantages over the existing unloading device:

[0008] 1. With automatic unloading function: alloy valve seat 5, alloy valve core 6 and alloy valve core seat 7 are installed in valve body 1. When the pressure reaches the set pressure, alloy valve seat 5 and alloy valve core 6 will automatically open and the hydraulic system will automatically unload.

[0009] 2. With adjustable pressure function: by adjusting the inlet pressure of the pilot K-type connector 9, the unloading pressure of the unloading valve can be adjusted.

[0010] 3. Compact structure: The valve body 1 is not equipped with a spring, but is equipped with an alloy valve seat 5 and an alloy valve core 6. It has a compact structure, small size, light weight and is easy to move.

[0011] 4. Simple structure: A hydraulic pilot springless automatic unloading device for a mining water cutting machine has a compact structure, light weight, complete specifications and models, easy installation, and easy promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The utility model is further described in detail below based on the drawings and embodiments.

[0013] Figure 1 It is a hydraulic pilot type springless automatic unloading valve structure diagram of a mining water cutting machine;

[0014] In the figure:

[0015] Valve body 1, left O-ring 2, unloading K-type joint 3, valve seat O-ring 4, alloy valve seat 5, alloy valve core 6, alloy valve core seat 7, right O-ring 8, pilot K-type joint 9, connecting sleeve 10, valve core seat O-ring 11, unloading hole 12. DETAILED DESCRIPTION

[0016] A hydraulic pilot type springless automatic unloading valve for a mining water cutting machine comprises a valve body 1, a left O-ring 2, an unloading K-type joint 3, a valve seat O-ring 4, an alloy valve seat 5, an alloy valve core 6, an alloy valve core seat 7, a right O-ring 8, a pilot K-type joint 9, a connecting sleeve 10, a valve core seat O-ring 11, and an unloading hole 12; the characteristics are as follows: the valve seat O-ring 4 is sleeved on the alloy valve seat 5, the alloy valve seat 5 is installed on the left side of the valve body 1, and the left O-ring 2 is sleeved on the unloading The load K-type joint 3 is screwed on the left side of the valve body 1; the alloy valve core 6 and the alloy valve core seat 7 are screwed together, the valve core seat O-ring 11 is sleeved on the alloy valve core seat 7, and then the alloy valve core seat 7 is installed in the valve body 1; the right O-ring 8 is sleeved on the left end of the connecting sleeve 10, the pilot K-type joint 9 is screwed on the right end of the connecting sleeve 10, and then the connecting sleeve 10 is tightened to the right end of the valve body 1, forming a pilot type automatic unloading device for mining water cutting machine.

[0017] When working, the hydraulic pilot springless automatic unloading valve for a mining water cutting machine is characterized in that the unloading K-type joint 3 is connected to the high-pressure liquid outlet pipe of the water cutting machine, and the pilot K-type joint 9 is connected to the bypass of the liquid inlet end of the water cutting machine; when the water pressure in the pilot K-type joint 9 is reduced, the alloy valve core seat 7 moves to the right, the alloy valve seat 5 and the alloy valve core 6 are opened, and the high-pressure water passes through the center hole of the alloy valve seat 5 and then flows out through the unloading hole 12, so that the pressure of the high-pressure liquid outlet pipe is reduced, and it plays the role of a hydraulic pilot springless automatic unloading valve for a mining water cutting machine.

[0018] When stopping working, stop supplying liquid to the unloading K-type joint 3 and the pilot K-type joint 9, stop the automatic unloading valve from working, clean the entire device with clean water, and place it in a ventilated and dry place.

[0019] Practice has proved that the hydraulic pilot type springless automatic unloading valve for mining water cutting machine manufactured according to the above implementation plan can have a working pressure of 25MPa, 35MPa, and 45MPa; the working flow rate can be selected between 60L / min, 90L / min, and 120L / min. A hydraulic pilot type springless automatic unloading device for mining water cutting machine has complete functions, stable operation, flexible adjustment, safety and reliability.

Claims

1. A hydraulic pilot type springless automatic unloading valve for a mining water cutting machine, comprising a valve body (1), a left O-ring (2), an unloading K-type joint (3), a valve seat O-ring (4), an alloy valve seat (5), an alloy valve core (6), an alloy valve core seat (7), a right O-ring (8), a pilot K-type joint (9), a connecting sleeve (10), a valve core seat O-ring (11), and an unloading hole (12); characterized in that: The valve seat O-ring (4) is sleeved on the alloy valve seat (5), the alloy valve seat (5) is installed on the left side of the valve body (1), the left O-ring (2) is sleeved on the unloading K-type joint (3), and the unloading K-type joint (3) is screwed on the left side of the valve body (1); the alloy valve core (6) and the alloy valve core seat (7) are screwed together, the valve core seat O-ring (11) is sleeved on the alloy valve core seat (7), and then the alloy valve core seat (7) is installed in the valve body (1); the right O-ring (8) is sleeved on the left end of the connecting sleeve (10), the pilot K-type joint (9) is screwed on the right end of the connecting sleeve (10), and then the connecting sleeve (10) is tightened on the right end of the valve body (1), forming a pilot type automatic unloading device for a mining water cutting machine.

2. A hydraulic pilot type springless automatic unloading valve for a mining water cutting machine according to claim 1, characterized in that The unloading K-type joint (3) is connected to the high-pressure liquid outlet pipe of the water jet cutting machine, and the pilot K-type joint (9) is connected to the bypass of the liquid inlet end of the water jet cutting machine; when the water pressure in the pilot K-type joint (9) is reduced, the alloy valve core seat (7) moves to the right, the alloy valve seat (5) and the alloy valve core (6) are opened, and the high-pressure water flows through the center hole of the alloy valve seat (5) and then flows out through the unloading hole (12), so that the pressure of the high-pressure liquid outlet pipe is reduced, and the hydraulic pilot type springless automatic unloading valve of the mining water jet cutting machine is played.

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