Oil control valve for preventing hydraulic oil of coal mine stress sensor from being emptied at one time

Abstract

The utility model discloses an oil control valve for preventing hydraulic oil of a coal mine stress sensor from being emptied at a time, and relates to the technical field of stress sensor overhauling tools. The three-way pipe connecting device comprises a connecting nozzle used for being connected with a three-way pipe, an air bag is arranged at the end, inserted into the three-way pipe, of the connecting nozzle, and an inflating mechanism for inflating the air bag is arranged at the end of the tail of the connecting nozzle. When the stress sensor is overhauled, the connecting nozzle can be arranged in a passage pipe of the three-way pipe and reaches the junction of the three pipes of the three-way pipe, and then the air bag is inflated by the inflating mechanism, so that the three-way pipe is sealed by the inflated air bag, and the stress sensor can be overhauled conveniently. And the hydraulic oil cannot be directly emptied, so that errors of monitoring data of the stress sensor are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of stress sensor repair tools, in particular to an oil control valve for preventing the hydraulic oil of a coal mine stress sensor from being unloaded all at once. Background Art

[0002] The use of stress sensors in the safe production process of coal mines can monitor in real time the changes in the surrounding rock stress field affected by mining disturbances, analyze the distribution of high stress areas and stress abnormality areas, and based on the relationship between the surrounding rock stress state and impact hazard, realize anti-impact hazard monitoring and early warning, and guide the optimization of on-site mining speed and support methods.

[0003] In order to ensure production, the stress sensor also needs to be inspected and maintained (without stopping the machine) during the monitoring process. In order to avoid the hydraulic oil in the stress sensor being discharged all at once during the inspection and maintenance process (affecting monitoring), this application studies the stress sensor oil control valve to solve the problem of erroneous monitoring data of the stress sensor caused by the one-time discharge of the hydraulic oil in the stress sensor. Utility Model Content

[0004] In order to achieve the above-mentioned purpose, the utility model specifically adopts the following technical solutions:

[0005] An oil control valve for preventing the hydraulic oil of a coal mine stress sensor from being discharged all at once, comprising a connecting nozzle for connecting to a three-way pipe, characterized in that an air bag is arranged at one end of the connecting nozzle inserted into the interior of the three-way pipe, and an inflation mechanism for inflating the air bag is arranged at one end of the tail of the connecting nozzle, so as to inflate the air bag and temporarily close the pipeline.

[0006] Furthermore, the connecting nozzle is constructed in a long cylindrical shape and is hollow inside, and the outer wall of the connecting nozzle is constructed with threads, which are used to connect the three-way pipe.

[0007] Furthermore, the tail of the connecting nozzle is structured with a hexagonal portion.

[0008] Furthermore, the pumping mechanism comprises a piston slidably arranged in the inner cavity of the connecting nozzle, a bearing at the rear of the piston is connected to a screw rod, and the screw rod thread penetrates the hexagonal portion and extends outward.

[0009] Furthermore, the extended end of the screw rod is fixedly connected with a handle.

[0010] Furthermore, the end of the connecting nozzle is connected to a transfer tube, and the transfer tube is L-shaped and is connected and fixed to the airbag.

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

[0012] 1. The utility model can temporarily close the pipeline when the airbag is inflated. When maintenance is needed, the connecting nozzle can be placed in a passage tube of the tee pipe and reach the intersection of the three tubes of the tee pipe. Then, the airbag is inflated by the inflation mechanism, so that the inflated airbag closes the tee pipe, so that when the stress sensor is repaired, the hydraulic oil will not be directly discharged, which will cause errors in the monitoring data of the stress sensor.

[0013] 2. The tail of the connection nozzle of the utility model is constructed with a hexagonal portion, and the hexagonal structure is arranged so that a wrench can rotate the connection nozzle.

[0014] 3. The utility model adopts an L-shaped adapter tube to make the airbag change from horizontal to vertical, so that the bulging angle can be directly opposite to the length direction of the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is an internal cross-sectional view of the utility model installed at a three-way valve;

[0016] Figure 2 It is a three-dimensional structural schematic diagram of the utility model installed at a three-way valve;

[0017] Figure 3 It is a top view of the utility model;

[0018] Figure numerals: 1, connecting nozzle; 2, air bag; 3, inflation mechanism; 301, piston; 302, screw; 303, handle; 4, thread; 5, hexagonal part; 6, adapter tube. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiments of the present utility model clearer, the technical solution in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model.

[0020] The present application provides an oil control valve for preventing the hydraulic oil of a coal mine stress sensor from being discharged at one time, which is mainly used to solve the problem of erroneous monitoring data of the stress sensor caused by the one-time discharge of the hydraulic oil in the stress sensor, and provides the following technical solutions. Figure 1-Figure 3 Make a detailed description:

[0021] The invention discloses an oil control valve for preventing the hydraulic oil of a coal mine stress sensor from being discharged all at once, comprising a connecting nozzle 1 for being connected to a three-way pipe, wherein the three-way pipe is a spare part of the stress sensor and is a part of the oil circuit, wherein an end of the connecting nozzle 1 inserted into the interior of the three-way pipe is provided with an air bag 2, and a rear end of the connecting nozzle 1 is provided with an air pumping mechanism 3 for blowing air into the air bag 2, and the pipeline can be temporarily closed when the air bag 2 is inflated, and when maintenance is required, the connecting nozzle 1 can be placed in a passage pipe of the three-way pipe and reach the intersection of the three pipes of the three-way pipe, and then the air pumping mechanism 3 is used to inflate the air bag 2, and then the inflated air bag 2 closes the three-way pipe, so that when the stress sensor is maintained, the hydraulic oil will not be directly discharged, resulting in the problem of erroneous monitoring data of the stress sensor, and it should be noted that the three-way pipe used by the stress sensor here is an internal threaded three-way pipe, so the outer wall of the connecting nozzle 1 is constructed with threads 4 connected to the thread.

[0022] like Figure 2 As shown, in order to further optimize the technical solution, the tail of the connecting nozzle 1 is constructed with a hexagonal portion 5. The hexagonal structure allows a wrench to rotate the connecting nozzle 1.

[0023] like Figure 1 As shown, the details of the inflation mechanism 3 will be described in detail here, which includes a piston 301 slidably arranged in the inner cavity of the connecting nozzle 1, and a screw 302 is connected to the rear bearing of the piston 301. The screw 302 threadedly penetrates the hexagonal part 5 and extends outward and is fixedly connected to a handle 303. By rotating the screw 302, the piston 301 at the end can be pushed to move in the cavity of the connecting nozzle 1, thereby inflating the airbag 2. The design structure of the screw 302 is to stop the piston 301 at any position, and thus in addition to inflating the airbag 2, the degree of inflation of the airbag 2 can also be controlled, and the oil circuit can be connected but the flow rate is very small.

[0024] like Figure 3 As shown, in order to further optimize the technical solution, the end of the connecting nozzle 1 is connected to a adapter tube 6, which is L-shaped and connected and fixed to the airbag 2. The L-shaped adapter tube 6 can make the airbag 2 change from horizontal to vertical, so that its bulging angle can be directly opposite to the length direction of the pipeline.

[0025] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An oil control valve for preventing the hydraulic oil of a coal mine stress sensor from being discharged all at once, comprising a connection nozzle (1) for connecting to a three-way pipe, characterized in that: An air bag (2) is arranged at one end of the connecting nozzle (1) inserted into the interior of the three-way pipe, and an inflation mechanism (3) for blowing air into the air bag (2) is arranged at one end of the tail of the connecting nozzle (1), so as to inflate the air bag (2) and temporarily close the pipeline.

2. The oil control valve for preventing the hydraulic oil of a coal mine stress sensor from being discharged at one time according to claim 1 is characterized in that: The connecting nozzle (1) is constructed in the shape of a long tube and is hollow inside. The outer wall of the connecting nozzle (1) is provided with threads (4), and the threads (4) are used to connect a three-way pipe.

3. The oil control valve for preventing the hydraulic oil of a coal mine stress sensor from being discharged at one time according to claim 1 is characterized in that: The tail of the connection nozzle (1) is configured with a hexagonal portion (5).

4. The oil control valve for preventing the hydraulic oil of a coal mine stress sensor from being discharged all at once according to claim 1, characterized in that: The pumping mechanism (3) comprises a piston (301) slidably arranged in the inner cavity of the connecting nozzle (1), the tail bearing of the piston (301) is connected to a screw rod (302), and the screw rod (302) is threadedly passed through the hexagonal portion (5) and extends outward.

5. The oil control valve for preventing the hydraulic oil of the coal mine stress sensor from being discharged all at once according to claim 4, characterized in that: The extended end of the screw rod (302) is fixedly connected to a handle (303).

6. The oil control valve for preventing the hydraulic oil of a coal mine stress sensor from being discharged all at once according to claim 1, characterized in that: The end of the connection nozzle (1) is connected to a transfer tube (6), and the transfer tube (6) is L-shaped and is connected and fixed to the airbag (2).

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