Electromagnetic pilot operated valve shell used on coal mine hydraulic support

Abstract

The utility model provides an electromagnetic pilot valve casing used on a coal mine hydraulic support, which relates to the technical field of pilot valves, and comprises a valve body casing, an electromagnetic actuator casing and a mounting box, a working cavity of a valve core component is arranged in the valve body casing, and a concave cavity used for a lever to be positioned in is inwards concavely arranged at the end part of one side of the valve body casing. The valve body shell is provided with an installation channel which is communicated with the working cavity and the concave cavity and used for the valve element assembly to penetrate through, so that the valve element assembly is in threaded connection with the lever through the bolt fine adjustment device, the electromagnetic actuator shell abuts against the concave cavity side of the valve body shell and is fixed through a screw to seal the concave cavity, and the installation box is installed on the electromagnetic actuator shell. The side wall of the valve body shell is provided with an open window which is communicated with the inner groove of the valve body shell and corresponds to a fine adjustment device for adjusting the lever, and the open window is covered with a sealing plate detachably connected with the valve body shell.

Description

Technical Field

[0001] The utility model relates to the technical field of pilot valves, in particular to a valve housing of an electromagnetic pilot valve used on a hydraulic support of a coal mine. Background Art

[0002] At present, the main development direction of coal mines is unmanned coal mining. At present, hydraulic supports and electro-hydraulic control are the main ways to realize unmanned operation in mines. The electric-controlled hydraulic pilot valve is the core component that controls the action of the entire hydraulic support. The existing patent authorization number is CN201916266U, which is an intrinsically safe electromagnetic pilot valve for explosive gas environments, including a valve body, two two-position three-way pilot valve cores with the same structure symmetrically arranged on the upper and lower sides of the horizontal midline of the valve body; the right end of the valve body is a cavity structure, and the top rods of the two two-position three-way pilot valve cores extend horizontally into the concave cavity and are connected to one end of the lever. Two electromagnetic actuators are sealed at the right end of the valve body corresponding to the concave cavity position, and push rods are horizontally fixed on the armatures of the two electromagnetic actuators, and the two push rods extend to the contact position with the lever respectively; an installation box is fixed on the electromagnetic actuator body, and an electromagnetic actuator control circuit board is sealed and fixed in the installation box by potting glue, and a dustproof and waterproof intrinsically safe electrical socket and an electromagnetic actuator action indicator light are arranged on the side wall of the installation box.

[0003] The electromagnetic pilot valve needs to be debugged first. The low liquid return resistance plug-in electromagnetic pilot valve with the existing patent authorization number CN202048043U includes an electromagnet and a pilot valve. The valve body of the pilot valve is provided with a valve cavity, namely an upper working cavity and a lower working cavity. The valve body is drilled with flow channels, namely a liquid inlet flow channel, a liquid return flow channel, a working flow channel and a pilot flow channel, which are connected to the working cavity and the lower working cavity. The diameter of the liquid return flow channel is larger than that of the liquid inlet flow channel. The valve core components in the upper working cavity and the lower working cavity contain screw plugs, and the screw plugs are placed Spring, the spring supports the spring seat, the liquid inlet valve ball is placed on the spring seat, the push rod is placed on the liquid inlet valve ball, the push rod is covered with a valve seat, the push rod supports the liquid return valve ball, the pilot valve stem is placed on the liquid return valve ball, the pilot valve stem is covered with a liquid return valve sleeve, the valve core assembly is installed in the upper working chamber and the lower working chamber as an integral connector, the pilot valve stem is connected to the lever mechanism through a screw fine-tuning device, when the electromagnet is energized, the electromagnet pushes the lever mechanism to open the liquid inlet ball valve, which is used for coal mine hydraulic support.

[0004] In the prior art, the electromagnetic actuator and the valve body in the electromagnetic pilot valve are detachably connected by screws and sealant is applied on the abutting surface between the two. The applicant has found that the prior art has at least the following technical problems: since the electromagnetic pilot valve lever height adjustment in the past requires the electromagnetic pilot valve to be repeatedly disassembled, which is quite time-consuming, and the sealant is applied after the lever is adjusted, the lever height will be affected to a certain extent; if the debugging personnel have no debugging experience, they need to repeatedly disassemble the electromagnetic valve for debugging. Utility Model Content

[0005] The utility model aims to provide a solenoid pilot valve housing for a coal mine hydraulic support, so as to solve the technical problems in the prior art that the existing debugging is cumbersome and requires repeated debugging.

[0006] In order to solve the above problems, the electromagnetic pilot valve housing used in the hydraulic support of coal mines involved in the utility model adopts the following technical solutions:

[0007] The utility model provides an electromagnetic pilot valve housing for a coal mine hydraulic support, comprising a valve body shell, an electromagnetic actuator shell, and an installation box. A working chamber of a valve core assembly is arranged in the valve body shell, and a concave chamber for a lever to be located therein is recessed inwardly at one side end of the valve body shell. An installation channel for the valve core assembly to pass through the working chamber and the concave chamber is provided on the valve body shell, so that the valve core assembly is screwed to the lever through a screw fine-tuning device, the electromagnetic actuator shell abuts against the concave chamber side of the valve body shell and is fixed by screws to seal the concave chamber, and the installation box is installed on the electromagnetic actuator shell, and is characterized in that a window is provided on the side wall of the valve body shell, which is connected to the inner groove and corresponds to the fine-tuning device for adjusting the lever, and a sealing plate detachably connected to the valve body shell is provided on the window.

[0008] Preferably, two sets of valve core assemblies are installed in the valve body shell, two levers are arranged in the concave cavity, the two sets of valve core assemblies are respectively connected to the corresponding lever through a fine-tuning device, and two windows are opened on the side wall of the valve body shell to connect to the inner groove and correspond to the two fine-tuning devices respectively.

[0009] Preferably, a positioning groove is provided on the side wall of the valve body shell and is arranged to match the size of the sealing plate surrounding the periphery of the window opening. A screw hole is provided on the sealing plate. A positioning hole is provided on the groove wall of the positioning groove and is arranged to match the position of the screw hole. The sealing plate is placed on the positioning groove in a matching manner, and the screw hole and the positioning hole are arranged correspondingly. The screws are passed through the screw hole and are screwed to the positioning hole to fix the sealing plate.

[0010] Preferably, a slope surface is provided between the two positioning grooves located at the opposite sides of the two window openings and the side wall of the valve body shell.

[0011] The beneficial effects of the utility model are as follows:

[0012] The utility model provides an electromagnetic pilot valve housing for a coal mine hydraulic support, comprising a valve body shell, an electromagnetic actuator shell, and an installation box. A working chamber of a valve core assembly is arranged in the valve body shell, and a concave chamber for a lever to be located therein is recessed inwardly at one side end of the valve body shell. An installation channel for the valve core assembly to pass through and connecting the working chamber and the concave chamber is provided on the valve body shell, so that the valve core assembly is screwed to the lever through a screw fine-tuning device, the electromagnetic actuator shell abuts against the concave chamber side of the valve body shell and is fixed by screws to seal the concave chamber, and the installation box is mounted on the electromagnetic actuator shell. Compared with the prior art, a window is provided on the side wall of the valve body shell, which is connected to the inner groove and corresponds to the fine-tuning device for adjusting the lever, and a sealing plate detachably connected to the valve body shell is provided on the window. In the past, the electromagnetic pilot valve lever height adjustment required the electromagnetic components to be disassembled repeatedly, which was quite time-consuming. After adjusting the lever, the sealant was applied, which would have a certain impact on the lever height. If the adjustment personnel had no adjustment experience, they would need to adjust the lever multiple times. However, the electromagnetic pilot valve adjustment lever height of the utility model is adjusted through the side skylight, and the electromagnetic components do not need to be disassembled for adjustment. It does not require experienced adjustment personnel or multiple adjustments. Moreover, the adjustment of the lever height through the side skylight can reduce the number of adjustments and improve the adjustment efficiency, thereby improving the production rate and reliability of the pilot valve products. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the following is a brief introduction to the drawings required for use in the embodiment:

[0014] Figure 1 It is an isometric view of the valve housing of the solenoid pilot valve;

[0015] Figure 2 for Figure 1 A partial cross-sectional view from the top view;

[0016] Figure 3 It is a cross-sectional view of the valve housing of the solenoid pilot valve.

[0017] Explanation of the reference numerals: 1. valve body shell; 2. electromagnetic actuator shell; 3. mounting box; 4. sealing plate; 5. screw hole; 6. slope surface; 7. screw; 8. bolt fine-tuning device; 9. lever. DETAILED DESCRIPTION

[0018] In order to make the technical purpose, technical solution and beneficial effects of the present utility model clearer, the technical solution of the present utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0019] The utility model provides a solenoid pilot valve housing for a coal mine hydraulic support. As shown in the figure, the solenoid pilot valve housing comprises a valve body housing 1, an electromagnetic actuator housing 2 and an installation box 3. A working chamber of a valve core assembly is arranged in the valve body housing 1. A concave chamber for a lever 9 is recessed inwardly at one side end of the valve body housing 1. An installation channel for the valve core assembly to pass through the working chamber and the concave chamber is opened on the valve body housing 1, so that the valve core assembly is screwed to the lever 9 through a bolt fine-tuning device 8. The electromagnetic actuator housing 2 abuts against the concave chamber side of the valve body housing 1 and is fixed by screws 7 to seal the concave chamber. At the same time, a proper amount of silicone adhesive sealant is evenly applied to the joint surface between the electromagnetic actuator housing 2 and the valve body housing 1 for waterproofing. The installation box 3 is arranged on the electromagnetic actuator housing 2. The structures inside the valve body shell 1, the electromagnetic actuator shell 2, the installation box 3 and the components installed therein are all prior art and are not the specific contents to be protected by this application. For example, the low backflow resistance plug-in electromagnetic pilot valve with patent authorization number CN202048043U and the intrinsically safe electromagnetic pilot valve with patent authorization number CN20196266U involve the shell structure of the valve body and the matching relationship between the valve body and the electromagnetic actuator. They are all applicable to this application. This application only changes the current shell structure.

[0020] A window is provided on the side wall of the valve body shell 1 , which is connected to the inner groove and corresponds to the position of the fine adjustment device for adjusting the lever 9 . A sealing plate 4 detachably connected to the valve body shell 1 is provided on the window.

[0021] Furthermore, the valve body shell 1 is used to install two two-position three-way pilot valve core assemblies of the same structure, that is, the valve body shell 1 is provided with two spaced working chambers, each of which can be provided with a set of valve core assemblies, and the concave chamber can be provided with two levers 9, and the two sets of valve core assemblies are each connected to the corresponding lever 9 through a fine-tuning device. The above is the prior art, and the side wall of the valve body shell 1 is provided with two windows that are connected to the inner groove and correspond to the two fine-tuning devices respectively. Further, the side wall of the valve body shell 1 is provided with a positioning groove that is arranged around the periphery of the window and matches the size of the sealing plate 4, the sealing plate 4 is provided with a screw hole 5, and the groove wall of the positioning groove is provided with a positioning hole that matches the position of the screw hole 5, the sealing plate 4 is matched and placed on the positioning groove, the screw hole 5 is arranged corresponding to the positioning hole, and the screw 7 passes through the screw hole 5 and is screwed to the positioning hole to fix the sealing plate 4. The two positioning grooves are located at the opposite sides of the two window openings and a slope surface 6 is arranged between the side wall of the valve body shell 1. The arrangement of the slope surface 6 facilitates the coating of sealant between the positioning groove and the side wall of the valve body shell 1 for waterproofing.

[0022] The debugging method of the device is as follows: unscrew the screw 7 to open the side window sealing plate 4, use a tool to adjust the tightness of the bolt fine-tuning device 8 to adjust the lever 9 to a certain height required, and then evenly apply an appropriate amount of silicone adhesive sealant on the joint surface of the sealing plate 4 for waterproofing and then package it.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate but not to limit the technical solutions of the present invention, and any equivalent substitutions of the present invention and any modifications or partial substitutions that do not depart from the spirit and scope of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A solenoid pilot valve housing for a coal mine hydraulic support, comprising a valve body housing, an electromagnetic actuator housing, and an installation box, wherein a working chamber of a valve core assembly is arranged in the valve body housing, a concave chamber for a lever to be located inwardly is arranged at one end of the valve body housing, and an installation passage for the valve core assembly to pass through the valve body housing and the working chamber and the concave chamber is opened on the valve body housing, so that the valve core assembly is screwed to the lever through a bolt fine-tuning device, the electromagnetic actuator housing abuts against the concave chamber side of the valve body housing and is fixed by screws to seal the concave chamber, and the installation box is installed on the electromagnetic actuator housing, characterized in that: A window communicating with the inner groove and corresponding to the fine-tuning device for adjusting the lever is provided on the side wall of the valve body shell, and a sealing plate detachably connected with the valve body shell is provided on the window.

2. The electromagnetic pilot valve housing for a coal mine hydraulic support according to claim 1 is characterized in that Two sets of valve core assemblies are installed in the valve body shell, and two levers are arranged in the concave cavity. The two sets of valve core assemblies are respectively connected to the corresponding lever through a fine-tuning device. Two windows are opened on the side wall of the valve body shell, which are connected to the inner groove and correspond to the two fine-tuning devices respectively.

3. The electromagnetic pilot valve housing for a coal mine hydraulic support according to claim 2 is characterized in that , A positioning groove is provided on the side wall of the valve body shell and is arranged around the periphery of the window to match the size of the sealing plate. A screw hole is provided on the sealing plate. A positioning hole is provided on the groove wall of the positioning groove to match the position of the screw hole. The sealing plate is placed on the positioning groove to match the screw hole. The screw hole and the positioning hole are arranged correspondingly. The screws are passed through the screw hole and are screwed to the positioning hole to fix the sealing plate.

4. The electromagnetic pilot valve housing for a coal mine hydraulic support according to claim 3 is characterized in that , two positioning grooves are located at the opposite sides of the two windows, and slope surfaces are arranged between the side walls of the valve body shell.

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