Wireless transmitting component structure for coal mine and assembling method thereof

Abstract

The assembly structure comprises an outer pipe, a wireless transmitting connector, a protective cover and a transmitting antenna assembly, the wireless transmitting connector is connected to one end of the outer pipe through threads, and a communication hole is formed in the wireless transmitting connector and used for being connected with a measurement-while-drilling instrument and a transmitting antenna through an aviation plug assembly. An annular groove in the wireless transmitting connector is used for containing the two half magnetic rings and the transmitting antenna assembly and is matched with the fixing ring through a clamping groove to support the protective cover and limit rotation of the protective cover. When the assembly is assembled, the two half magnetic rings are firstly arranged in the annular groove, then the transmitting antenna and the fixing ring are sequentially installed, and finally the protective cover is sleeved and fixed through the clamping groove. And cloth strip-shaped holes are uniformly formed in the protective cover, so that smooth transmission of wireless signals is ensured. The intrinsically safe circuit is adopted, and the sealing material is filled between the transmitting antenna and the protective cover, so that the waterproof and anti-cinder performance is improved. The structure is compact in design, easy to disassemble and assemble, suitable for complex environment under a coal mine, and capable of ensuring stable signal transmission.

Description

Technical Field

[0001] The invention belongs to the technical field of underground coal mine drilling measurement instruments and relates to a wireless transmitting component structure for coal mines and an assembling method thereof. Background Art

[0002] Since the existing downhole measurement instruments in coal mines are 5 to 8 meters away from the drill bit, the borehole trajectory measurement data and control lag behind. To improve the measurement and control accuracy of the borehole trajectory, it is necessary to implement downhole measurement near the drill bit. The wireless transmitter component is one of the core components of the downhole measurement instrument near the drill bit. It is mainly used to transmit the measurement data near the drill bit across the screw motor to the receiving end at the rear, so that the data can be transmitted to the hole mouth through the directional drill rod to guide the adjustment and control of the directional drilling trajectory. The downhole measurement instruments near the drill bit developed in the existing ground petroleum field are generally large in diameter and too long in length, which seriously affects the slope rate of the screw motor and does not meet the special explosion-proof requirements of coal mines. Summary of the invention

[0003] In view of this, the purpose of the present invention is to solve the problem that the existing measurement while drilling instruments are too large and do not meet the special explosion-proof requirements underground, and to provide a wireless transmission component structure for coal mines and an assembly method thereof.

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] A wireless transmitting assembly structure for coal mines, comprising an outer tube, a wireless transmitting connector, a protective cover, and a transmitting antenna assembly; a drilling measurement instrument is installed in the outer tube, a water hole is provided in the middle of the wireless transmitting connector, and the wireless transmitting connector is connected to one end of the outer tube by a thread; a communication hole is provided in the wireless transmitting connector, and an aerial plug assembly for connecting the drilling measurement instrument and the transmitting antenna assembly is provided in the communication hole; an annular groove is provided on the wireless transmitting connector, and the transmitting antenna assembly is arranged in the annular groove, and the protective cover is sleeved on the wireless transmitting connector to cover the transmitting antenna assembly therein; a plurality of strip holes are evenly distributed on the circumference of the protective cover as a channel for wireless signal transmission; the outer tube, the wireless transmitting connector, and the protective cover are all made of non-magnetic steel materials to reduce magnetic interference and ensure the accuracy of the measurement data.

[0006] Furthermore, the transmitting antenna assembly includes two magnetic rings, a transmitting antenna, and a transmitting circuit; the two magnetic rings are semicircular in shape, the inner diameter of the magnetic rings is the same as the bottom diameter of the annular groove, and are arranged in the annular groove; the transmitting circuit is an intrinsically safe circuit.

[0007] Furthermore, a shoulder is provided on one side of the annular groove close to the outer tube, and a slot is provided on the shoulder. A protruding flange is provided on one end of the protective cover close to the outer tube, and the flange is clamped in the clamping slot to limit the circumferential rotation of the protective cover. A fixing ring is provided at the other end of the protective cover, and the fixing ring is composed of two halves. The fixing ring is clamped on the wireless transmitting connector, and the protective cover is sleeved on the fixing ring and supported by the fixing ring; the end surface of the fixing ring protrudes toward the outside of the protective cover, and is used for radial positioning and support during connection. The combination of two halves of the magnetic ring and two halves of the fixing ring is conducive to reducing the overall radial and axial dimensions, and is detachable for easy maintenance.

[0008] Furthermore, the communication hole includes a transverse hole arranged along the axial direction and an inclined hole arranged obliquely, and the aviation plug assembly is arranged in the inclined hole to seal the inclined hole.

[0009] Furthermore, a gap is provided between the transmitting antenna assembly and the protective cover, and the gap is filled with sealing material.

[0010] Furthermore, the wireless transmitting step connector is connected to the outer tube via a straight thread, and the other end is provided with a tapered thread.

[0011] Furthermore, the wireless transmitting connector is provided with a square bayonet for tightening the connector and removing the threads.

[0012] A method for assembling the wireless transmission assembly structure for coal mines as described above comprises the following steps:

[0013] S1. Install the magnetic ring. First, insert the two semicircular magnetic rings into the annular grooves of the wireless transmitter connector.

[0014] S2. Transmitting antenna installation: Place the transmitting antenna on the magnetic ring and connect the transmitting circuit;

[0015] S3. Fixing ring installation: Clamp the two halves of the fixing ring onto the wireless transmitting connector to ensure the axial stability of the transmitting antenna assembly;

[0016] S4. Install the protective cover: Put the protective cover on the wireless transmitting connector so that the flange of the protective cover is inserted into the slot on the annular groove to prevent circumferential rotation;

[0017] S5. Sealing material filling: Fill the gap between the transmitting antenna assembly and the protective cover with sealing material to enhance the sealing performance;

[0018] S6. External pipe connection: Use straight thread to connect the wireless transmitter connector to the external pipe. The other end is connected to the drill pipe with a tapered thread to ensure a secure installation.

[0019] Furthermore, during disassembly, the square bayonet of the wireless transmitting connector is used to loosen or tighten the threads.

[0020] The beneficial effects of the present invention are:

[0021] 1. The structure is compact. It adopts the design of two half magnetic rings and two half fixed rings to reduce the radial and axial dimensions of the components. It has the advantages of small structure size and short length. It is suitable for use in small-diameter downhole measurement instruments in coal mines.

[0022] 2. Explosion-proof design, using intrinsically safe circuits to meet the explosion-proof requirements of underground coal mines.

[0023] 3. Easy maintenance, the components are designed to be detachable, which is easy to install and maintain.

[0024] 4. Stable signal transmission: The strip holes on the protective cover ensure the smooth flow of wireless signals, and the communication holes are sealed to improve anti-interference capabilities.

[0025] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0027] Figure 1 It is an overall schematic diagram of the structure of the wireless transmitting component for coal mines in the present invention.

[0028] Figure 2 It is a schematic diagram of the structure of the wireless transmitting connector in the present invention.

[0029] Figure 3 This is an amplifying circuit diagram of the wireless transmitting connector of the present invention.

[0030] Figure 4 It is a cross-sectional schematic diagram of a wireless transmitting connector.

[0031] Figure markings: 1-outer tube; 2-wireless transmitting connector; 3-protective cover; 4-transmitting antenna assembly; 5-fixing ring; 6-aviation plug assembly; 201-communication hole; 202-square bayonet; 203-threaded stop end face; 204-water hole; 206-annular space; 205-shoulder; 207-protective cover end face; 301-flange; 302-strip hole; 501-fixing ring end face. DETAILED DESCRIPTION

[0032] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0033] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0034] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0035] Please refer to Figures 1 to 4 , which is a wireless transmitting component structure for coal mines, including an outer tube 1, a wireless transmitting connector 2, a protective cover 3, and a transmitting antenna component 4; a drilling measurement instrument is installed in the outer tube 1, a water hole 204 is provided in the middle of the wireless transmitting connector 2, and the wireless transmitting connector 2 is connected to one end of the outer tube 1 through a thread; a communication hole 201 is provided in the wireless transmitting connector 2, and an aerial plug component 6 for connecting the drilling measurement instrument and the transmitting antenna component 4 is provided in the communication hole 201; an annular groove is provided on the wireless transmitting connector 2, and the transmitting antenna component 4 is arranged in the annular groove, and the protective cover 3 is sleeved on the wireless transmitting connector 2 to cover the transmitting antenna component 4 therein; a plurality of strip holes 302 are evenly distributed on the circumference of the protective cover 3 as a channel for wireless signal transmission; the outer tube 1, the wireless transmitting connector 2, and the protective cover 3 are all made of non-magnetic steel materials to reduce magnetic interference and ensure the accuracy of the measurement data.

[0036] The transmitting antenna assembly 4 includes two magnetic rings, a transmitting antenna, and a transmitting circuit; the two magnetic rings are semicircular in shape, the inner diameter of the magnetic rings is the same as the bottom diameter of the annular groove, and are arranged in the annular groove; the transmitting circuit adopts methods such as reducing capacitance and inductance and protecting the power supply part to achieve intrinsically safe circuit design to meet the special explosion-proof requirements of coal mines.

[0037] A shoulder 205 is provided on one side of the annular groove close to the outer tube 1, and a slot is provided on the shoulder 205. A protruding flange 301 is provided on one end of the protective cover 3 close to the outer tube 1. The flange 301 is clamped in the clamping slot to limit the circumferential rotation of the protective cover 3. A fixing ring 5 is provided on the other end of the protective cover 3. The fixing ring 5 consists of two halves. The fixing ring 5 is clamped in the groove of the wireless transmitting connector 2. The outer diameter of the fixing ring 5 is consistent with the shoulder 205, and is used to support the protective cover 3. The protective cover 3 is sleeved on the fixing ring 5 and supported by the fixing ring 5; the fixing ring end face 501 protrudes to the outside of the protective cover 3, higher than the protective cover end face 207 and the thread stop end face 203 of the wireless transmitting connector 2, and is used for radial positioning and support when the right end is threaded. The combination of two halves of the magnetic ring and two halves of the fixing ring 5 is conducive to reducing the overall radial and axial dimensions, and is detachable for easy maintenance.

[0038] The communication hole 201 includes a transverse hole arranged along the axial direction and an inclined hole arranged obliquely, and the aviation plug assembly 6 is disposed in the inclined hole and seals the inclined hole.

[0039] An annular space 206 is provided between the transmitting antenna assembly 4 and the protective cover 3 , and the annular space 206 is filled with sealing material to prevent mud and water.

[0040] The wireless transmitting step connector is connected to the outer tube 1 through a straight thread, and the other end is provided with a tapered thread. A square bayonet 202 is arranged on the wireless transmitting connector 2 for tightening and removing the thread of the connector.

[0041] A method for assembling the above-mentioned wireless transmitting assembly structure for coal mines comprises the following steps:

[0042] S1. Install the magnetic ring. First, insert the two semicircular magnetic rings into the annular grooves of the wireless transmitting connector 2 respectively.

[0043] S2. Transmitting antenna installation: Place the transmitting antenna on the magnetic ring and connect the transmitting circuit;

[0044] S3, installation of the fixing ring 5: clamp the two halves of the fixing ring 5 onto the wireless transmitting connector 2 to ensure the axial stability of the transmitting antenna assembly 4;

[0045] S4, installation of the protective cover 3: the protective cover 3 is mounted on the wireless transmitting connector 2, so that the flange 301 of the protective cover 3 is inserted into the slot on the annular groove to prevent circumferential rotation;

[0046] S5, filling with sealing material: filling the gap between the transmitting antenna assembly 4 and the protective cover 3 with sealing material to enhance the sealing performance;

[0047] S6. Connection of outer tube 1: Use straight thread to connect wireless transmitter connector 2 to outer tube 1. The other end is connected to the drill pipe with tapered thread to ensure a firm installation.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A wireless transmitting component structure for coal mines, characterized in that: It includes an outer tube, a wireless transmitting connector, a protective cover, and a transmitting antenna assembly; a drilling measurement instrument is installed in the outer tube, a water hole is provided in the middle of the wireless transmitting connector, and the wireless transmitting connector is connected to one end of the outer tube by a thread; a communication hole is provided in the wireless transmitting connector, and an aerial plug assembly for connecting the drilling measurement instrument and the transmitting antenna assembly is provided in the communication hole; an annular groove is provided on the wireless transmitting connector, and the transmitting antenna assembly is arranged in the annular groove, and the protective cover is sleeved on the wireless transmitting connector to cover the transmitting antenna assembly therein; a plurality of strip holes are evenly distributed on the circumference of the protective cover as a channel for wireless signal transmission; the outer tube, the wireless transmitting connector, and the protective cover are all made of non-magnetic steel.

2. The wireless transmitting assembly structure for coal mine according to claim 1 is characterized in that: The transmitting antenna assembly includes two magnetic rings, a transmitting antenna, and a transmitting circuit; the two magnetic rings are semicircular in shape, the inner diameter of the magnetic rings is the same as the bottom diameter of the annular groove, and are arranged in the annular groove; the transmitting circuit is an intrinsically safe circuit.

3. The wireless transmitting assembly structure for coal mine according to claim 1 is characterized in that: A shoulder is provided on one side of the annular groove close to the outer tube, and a slot is provided on the shoulder. A protruding flange is provided on one end of the protective cover close to the outer tube, and the flange is clamped in the slot to limit the circumferential rotation of the protective cover. A fixing ring is provided at the other end of the protective cover, and the fixing ring consists of two halves. The fixing ring is clamped on the wireless transmitting connector, and the protective cover is sleeved on the fixing ring and supported by the fixing ring; the end surface of the fixing ring protrudes toward the outside of the protective cover, and is used for radial positioning and support during connection.

4. The wireless transmitting assembly structure for coal mine according to claim 1 is characterized in that: The communication hole comprises a transverse hole arranged along the axial direction and an inclined hole arranged obliquely. The aviation plug assembly is arranged in the inclined hole and seals the inclined hole.

5. The wireless transmitting assembly structure for coal mine according to claim 1 is characterized in that: A gap is provided between the transmitting antenna assembly and the protective cover, and the gap is filled with sealing material.

6. The wireless transmitting assembly structure for coal mine according to claim 1 is characterized in that: The wireless transmitting step connector is connected to the outer tube via a straight thread, and the other end is provided with a tapered thread.

7. The wireless transmitting assembly structure for coal mine according to claim 1 is characterized in that: The wireless transmitting connector is provided with a square bayonet for tightening the connector and removing the threads.

8. A method for assembling a wireless transmission assembly structure for coal mines as claimed in any one of claims 1 to 7, characterized in that: The following steps are involved: S1. Install the magnetic ring. First, insert the two semicircular magnetic rings into the annular grooves of the wireless transmitter connector. S2. Transmitting antenna installation: Place the transmitting antenna on the magnetic ring and connect the transmitting circuit; S3. Fixing ring installation: Clamp the two halves of the fixing ring onto the wireless transmitting connector to ensure the axial stability of the transmitting antenna assembly; S4. Install the protective cover: Put the protective cover on the wireless transmitting connector so that the flange of the protective cover is inserted into the slot on the annular groove to prevent circumferential rotation; S5. Sealing material filling: Fill the gap between the transmitting antenna assembly and the protective cover with sealing material to enhance the sealing performance; S6. External pipe connection: Use straight thread to connect the wireless transmitter connector to the external pipe. The other end is connected to the drill pipe with a tapered thread to ensure a secure installation.

9. The method for assembling the wireless transmitting assembly structure for coal mines according to claim 8, characterized in that: When disassembling, use the square bayonet of the wireless transmitter connector to loosen or tighten the threads.

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