Coal mining machine screw pretightening force monitoring device

Abstract

The utility model discloses a coal mining machine screw pretightening force monitoring device which comprises an upper axial hole, a lower axial hole and a radial hole. The measuring rod is arranged in the lower axial hole and can generate displacement along with the stretching of the screw rod; the displacement sensor is installed in the upper axial hole, a detection feeler lever of the displacement sensor extends into the lower axial hole and abuts against the upper end face of the measuring rod, and the displacement sensor is used for collecting the displacement amount of the measuring rod; the cable connector is arranged in the radial hole and is connected with the cable connecting end of the displacement sensor through a connecting cable; and the waterproof cover covers the upper end of the upper axial hole. The utility model has the advantages of good sealing performance, convenient installation, convenient wiring and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to screw pre -tightening force monitoring equipment technical field especially relates to a coal winning machine screw pre -tightening force monitoring device. BACKGROUND

[0002] Long screw (also known as hydraulic pull rod) is the important fastening component of the machine body of coal winning machine, through cooperation with high strength hydraulic nut, left and right traction box and the key components such as the electric control box in the middle of coal winning machine are connected into a whole, ensure the structural stability and working reliability of coal winning machine. Therefore, it is necessary to use monitoring equipment to monitor the pre -tightening force of coal winning machine screw in real time, so that potential loosening or falling risk can be found in time, so that corresponding maintenance measures can be taken in time, and accidents can be avoided.

[0003] Because coal winning machine is in high temperature and high humidity and other harsh environment for a long time, the sealing performance of the existing monitoring equipment is insufficient, which not only affects the accuracy of data acquisition, but also reduces the service life of the equipment. In addition, the existing monitoring equipment also has the problems of inconvenient installation and inconvenient wiring.

[0004] Therefore, the applicant finds a method to solve the above problems through beneficial exploration and research, and the technical scheme to be introduced below is generated in this background. CONTENT OF THE UTILITY MODEL

[0005] The utility model wants to solve the technical problem in that a coal winning machine screw pre -tightening force monitoring device with good sealing performance, convenient installation and convenient wiring is provided in view of the deficiency of prior art.

[0006] The technical problem solved by the utility model can be realized by adopting the following technical scheme:

[0007] A coal winning machine screw pre -tightening force monitoring device, comprising:

[0008] Upper axial hole, lower axial hole and radial hole, the upper axial hole is arranged in the screw and its upper end penetrates the top surface of the screw, the lower axial hole is arranged in the screw and is located below the upper axial hole and is communicated with the upper axial hole, the radial hole is arranged in the screw and its outer end penetrates the side surface of the screw and is communicated with the upper axial hole;

[0009] Measuring rod, the measuring rod is installed in the lower axial hole and can produce displacement following the stretching of the screw;

[0010] Displacement sensor, the displacement sensor is installed in the upper axial hole and its detection feeler extends into the lower axial hole and abuts on the upper end surface of the measuring rod, for collecting the displacement of the measuring rod;

[0011] A cable connector is mounted in the radial hole and connected with a cable connecting end of the displacement sensor through a connecting cable.

[0012] A waterproof cover is arranged at the upper end of the upper axial hole.

[0013] In a preferred embodiment of the present application, the lower end of the measuring rod is fixedly connected with the bottom surface of the lower axial hole, and a certain gap is formed between the outer peripheral surface of the measuring rod and the inner peripheral surface of the lower axial hole.

[0014] In a preferred embodiment of the present application, a mounting protruding column is formed at the end surface of the displacement sensor facing the measuring rod, an external thread is formed on the mounting protruding column, a stepped hole is formed at the connection between the upper axial hole and the lower axial hole, and an internal thread matched with the external thread is arranged in the stepped hole; during installation, the mounting protruding column of the displacement sensor is screwed into the stepped hole.

[0015] In a preferred embodiment of the present application, the displacement sensor is a high-precision displacement sensor with a model number of SEN920.

[0016] In a preferred embodiment of the present application, the cable connector is an M8 aviation plug.

[0017] In a preferred embodiment of the present application, a sealant is arranged between the outer peripheral surface of the cable connector and the inner peripheral surface of the radial hole.

[0018] In a preferred embodiment of the present application, the waterproof cover is mounted at the upper end of the upper axial hole in a threaded manner, and a thread sealant is arranged at the thread.

[0019] In a preferred embodiment of the present application, a sealing ring is arranged between the waterproof cover and the upper axial hole.

[0020] Due to the adoption of the above technical solutions, the present application has the advantages of being installed on a screw rod of a coal mining machine, capable of monitoring the change of the pre-tightening force of the screw rod in real time, having good sealing performance, being easy to install and wire, and the like. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0022] Figure 1 is a structural schematic diagram of the present application.

[0023] Figure 2 is Figure 1 a longitudinal sectional view. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, purposes and effects of the utility model easy to understand, the utility model is further described below in combination with specific drawings.

[0025] Referring to Figure 1 and Figure 2 , the device is a screw pre-tightening force monitoring device of a coal mining machine, comprising an upper axial hole 100a, a lower axial hole 100b, a radial hole 100c, a measuring rod 200, a displacement sensor 300, a cable connector 400 and a waterproof cover 500.

[0026] The upper axial hole 100a is formed in the screw 10 and its upper end penetrates the top surface 11 of the screw 10, the lower axial hole 100b is formed in the screw 10 and is located below the upper axial hole 100a and communicates with the upper axial hole 100a, and the radial hole 100c is formed in the screw 10 and its outer end penetrates the side surface of the screw 10 and communicates with the upper axial hole 100a.

[0027] The measuring rod 200 is installed in the lower axial hole 100b and can produce displacement following the stretching of the screw 10. The lower end of the measuring rod 200 is fixedly connected with the bottom surface of the lower axial hole 100a, and the fixedly connecting mode includes but is not limited to adhesive connection, threaded connection, interference fit connection and the like, and a certain gap is formed between the outer peripheral surface of the measuring rod 200 and the inner peripheral surface of the lower axial hole 100b, so as to facilitate the movement of the measuring rod 200 following the screw 10.

[0028] The displacement sensor 300 is installed in the upper axial hole 100a and its detection touch rod 310 extends into the lower axial hole 100b and abuts against the upper end surface 201 of the measuring rod 200, for collecting the displacement amount of the measuring rod 200. Specifically, the displacement sensor 300 is formed with a mounting convex column 320 at the end surface of the measuring rod 200, the mounting convex column 320 is formed with an external thread 321, a stepped hole 110 is formed at the connection of the upper axial hole 100a and the lower axial hole 100b, and an internal thread 111 matched with the external thread 321 is arranged in the stepped hole 110. When installed, the mounting convex column 310 of the displacement sensor 300 is screwed into the stepped hole 110 in a threaded manner, so that the displacement sensor 300 is fixedly installed. In this embodiment, the displacement sensor 300 preferably adopts a high-precision displacement sensor with a model number of SEN920.

[0029] The cable connector 400 is mounted in the radial hole 100c and connected with the cable connection end of the displacement sensor 300 through the connecting cable 410. The cable connector 400 is used for quick plug-in of the data connection cable, that is, one end of the data connection cable is plugged in the cable connector 400, and the other end is plugged in an external data collector, so that the displacement signal collected by the displacement sensor 300 is transmitted to the data collector through the cable connector 400, quick wiring is realized, and the internal sealing performance is also ensured. In the embodiment, the cable connector 400 preferably adopts an M8 aviation plug. In order to improve the sealing performance, the outer circumferential surface of the cable connector 400 and the inner circumferential surface of the radial hole 100c are provided with sealing glue.

[0030] The waterproof cover 500 is arranged at the upper end of the upper axial hole 100a. The waterproof cover 500 is mounted at the upper end of the upper axial hole 100a in a threaded manner, and the threaded glue is arranged at the thread. Meanwhile, the sealing ring 510 is arranged between the waterproof cover 500 and the upper axial hole 100a, so that the sealing performance is effectively improved.

[0031] The installation process of the coal mining machine screw pre-tightening force monitoring device is as follows:

[0032] 1. First, the measuring rod 200 is mounted in the lower axial hole 100b of the screw 10, and then the displacement sensor 300 is mounted in the upper axial hole 100a of the screw 10;

[0033] 2. The cable connector 400 is mounted in the radial hole 100c of the screw 10, and the sealing glue is coated between the cable connector 400 and the radial hole 100c;

[0034] 3. The connecting cable 410 is connected with the cable connector 400 and the displacement sensor 300;

[0035] 4. The waterproof cover 500 is mounted at the upper end of the upper axial hole 100a of the screw 10, and the threaded glue is applied at the thread;

[0036] 5. A data connection cable is taken, one end of the data connection cable is plugged in the cable connector 400, and the other end is plugged in an external data collector, so that the displacement signal collected by the displacement sensor 300 can be transmitted to the data collector.

[0037] The coal mining machine screw is installed, and the change of the screw pre-tightening force can be monitored in real time. When the pre-tightening force is lower than the set value, the system will automatically alarm, reminding the operator to tighten the screw in time, so that the equipment failure and safety accidents caused by the screw loosening are avoided.

[0038] The basic principle and main features of the present application and the advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A coal mining machine screw preload monitoring device, characterized in that: include: An upper axial hole, a lower axial hole, and a radial hole, wherein the upper axial hole is formed in the screw and its upper end passes through the top surface of the screw, the lower axial hole is formed in the screw and is located below the upper axial hole and communicates with the upper axial hole, and the radial hole is formed in the screw and its outer end passes through the side surface of the screw and communicates with the upper axial hole; a measuring rod, the measuring rod being installed in the lower axial hole and being capable of displacement following the stretching of the screw; A displacement sensor is installed in the upper axial hole and its detection feeler extends into the lower axial hole and abuts against the upper end surface of the measuring rod, for collecting the displacement of the measuring rod; a cable connector, the cable connector being mounted in the radial hole and connected to a cable connection end of the displacement sensor via a connecting cable; as well as A waterproof cover is provided at the upper end of the upper axial hole.

2. The coal mining machine screw preload monitoring device according to claim 1, characterized in that: The lower end of the measuring rod is fixedly connected to the bottom surface of the lower axial hole, and a certain gap is formed between the outer circumference of the measuring rod and the inner circumference of the lower axial hole.

3. The coal mining machine screw preload monitoring device according to claim 1, characterized in that: The displacement sensor is provided with a mounting boss at the end face facing the measuring rod, an external thread is formed on the mounting boss, a stepped hole is formed at the connection between the upper axial hole and the lower axial hole, and an internal thread matching the external thread is provided in the stepped hole; during installation, the mounting boss of the displacement sensor is screwed into the stepped hole.

4. The coal mining machine screw preload monitoring device according to claim 3, characterized in that: The displacement sensor is a high-precision displacement sensor of model SEN920.

5. The coal mining machine screw preload monitoring device according to claim 1, characterized in that: The cable connector is an M8 aviation plug.

6. The coal mining machine screw preload monitoring device according to claim 1, characterized in that: A sealant is provided between the outer circumferential surface of the cable connector and the inner circumferential surface of the radial hole.

7. The coal mining machine screw preload monitoring device according to claim 1, characterized in that: The waterproof cover is installed at the upper end of the upper axial hole in a threaded manner, and thread glue is provided at the thread.

8. The coal mining machine screw preload monitoring device according to claim 7, characterized in that: A sealing ring is provided between the waterproof cover and the upper axial hole.

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