Connector device special for coal mine underground sensor

Abstract

The invention relates to a connector device special for a coal mine underground sensor. According to the device, sealing redundancy protection is achieved through a three-stage sealing structure; and through internal and external multi-stage protection, super-strong tensile performance of the connector is realized, and flexible layout and shock resistance are realized. According to the cable connector, multiple problems of the cable connector in the existing coal mine underground working environment are effectively solved, reliable technical support is provided for intelligentization and data transmission of coal mine underground equipment, the stability and safety of the equipment and the quality of data transmission are improved, and more technical progress is brought to the coal mine industry.

Description

Technical Field

[0001] The present application relates to the field of underground mine drilling rig sensor wiring, and in particular, to a special connector device for underground mine sensors. Background Art

[0002] The working environment in coal mines is harsh, mainly including a series of extremely challenging factors such as high temperature, high humidity, coal dust, coal slag, and water that flows in from time to time. In the field of smart drilling rigs, the working environment they face is even more severe because the working location is closer to the inside of the coal mine. The sensor connector is usually installed on the main machine body and is close to the borehole mouth during drilling. During the drilling process, a large amount of coal slag, dirty water and other debris constantly impacts the sensor connector, sometimes even causing the connector to be completely immersed in dirty water, seriously affecting the data transmission of the sensor and even causing equipment failure.

[0003] In some coal mines, the corrosiveness of groundwater poses a serious threat to the connector seal, which greatly reduces the waterproof performance of the connector and increases the risk of equipment damage. In addition, general mining products need to undergo vibration tests, using 5g acceleration for vibration. The equipment can still operate stably and without damage before passing the safety certification. The drilling rig will inevitably be affected by periodic strong vibrations during operation, which will cause the connector wiring to loosen or even fall off, resulting in sensor wiring disconnection. Ordinary cable connectors are difficult to withstand large vibrations, making it difficult for ordinary connectors to be directly applied to the underground working environment of coal mines. The quality of the connector wiring protection will seriously affect the stability and reliability of the equipment.

[0004] In addition, in the underground passages of coal mines, there are many layers of debris, including air ducts, gas pipes, wire pipe clamps, and even large pieces of coal rocks that have fallen. These debris not only increase the complexity of the working environment, but also easily damage the sensor cables. The cable breaks, damages, or even being pulled out of the connector directly will have a serious impact on the normal use of the sensor, and thus threaten the safe production of the mine.

[0005] At present, the application of underground sensors in coal mines has become an important part of coal mine safety monitoring and intelligent equipment. However, due to the lack of specialization in the design of sensor connectors, there are problems such as poor sealing, poor seismic resistance, and weak tensile strength. In the harsh working environment underground in coal mines, traditional sensor connectors are often difficult to operate stably for a long time under such harsh conditions. They are extremely susceptible to external interference, damage, unstable connection, etc., which brings certain hidden dangers and inconveniences to coal mine production. Summary of the invention

[0006] In order to overcome at least one deficiency in the prior art, the present application provides a special connector device for underground coal mine sensors.

[0007] In a first aspect, a dedicated connector device for a coal mine underground sensor is provided, comprising: a dedicated connector, a sensor cable protection system, and a controller cable protection system; the dedicated connector is used to realize the connection between the sensor cable and the controller cable, the sensor cable protection system is used to protect the sensor cable, and the controller cable protection system is used to protect the controller cable;

[0008] The dedicated connector includes internal devices, which include a first-level protection device on the controller end, a second-level protection device on the controller end, a special cable connection quick plug, a second-level protection device on the sensor end, and a first-level protection device on the sensor end; the first-level protection device on the controller end and the second-level protection device on the controller end are used to protect the connection end between the dedicated connector and the controller cable, and the second-level protection device on the sensor end and the first-level protection device on the sensor end are used to protect the connection end between the dedicated connector and the sensor cable; the special cable connection quick plug is used to realize the connection between the sensor cable and the controller cable.

[0009] In one embodiment, the controller-end primary protection device includes a controller-end primary pressure ring, a controller-end elastic sealing sleeve, and a controller-end primary gasket, and the controller-end primary protection device is close to the end of the dedicated connector; the end of the controller cable extends into the dedicated connector and passes through the controller-end primary pressure ring, the controller-end elastic sealing sleeve, and the controller-end primary gasket in sequence;

[0010] A controller-end locking nut is also installed at the end of the special connector. The axial compression of the elastic sealing sleeve on the controller end is controlled by the tightening torque of the locking nut on the controller end. The elastic sealing sleeve on the controller end is deformed so that the outer diameter of the elastic sealing sleeve on the controller end is tightly squeezed against the inner hole wall of the special connector, and the inner diameter is tightly squeezed against the controller cable, so as to achieve the sealing of the inner diameter and outer diameter of the elastic sealing sleeve on the controller end and the locking and compression of the controller cable.

[0011] In one embodiment, the secondary protection device on the controller end includes a secondary pressure ring on the controller end and a secondary locking claw on the controller end; a controller end positioning step is provided on the inner hole wall of the dedicated connector, and the controller end positioning step is used to realize the axial positioning of the secondary locking claw on the controller end; the axial tightening pressure generated by the locking nut on the controller end is transmitted to the secondary locking claw on the controller end through the secondary pressure ring on the controller end, so that the secondary locking claw on the controller end is elastically deformed in the inner diameter direction to compress the controller cable.

[0012] In one embodiment, the controller-end secondary pressure ring includes a controller-end secondary pressure ring body, a controller-end secondary pressure ring outer diameter sealing ring, and a controller-end secondary pressure ring inner diameter sealing ring;

[0013] The secondary pressure ring body at the controller end includes a secondary sealing pressure ring body, a secondary sealing pressure ring outer diameter sealing groove, a secondary sealing pressure ring conical surface, a secondary sealing pressure ring center through hole, and a secondary sealing pressure ring inner diameter sealing groove. The secondary sealing pressure ring inner diameter sealing groove is provided with a controller end secondary pressure ring inner diameter sealing ring; a secondary sealing pressure ring outer diameter sealing groove is provided in the outer diameter direction of the secondary sealing pressure ring body, and a controller end secondary pressure ring outer diameter sealing ring is provided in the secondary sealing pressure ring outer diameter sealing groove; a secondary sealing pressure ring inner diameter sealing groove is provided in the inner diameter direction of the secondary sealing pressure ring body, and a secondary sealing pressure ring conical surface is provided below the secondary sealing pressure ring body for use with the secondary locking claw at the controller end; a secondary sealing pressure ring center through hole is provided in the center of the secondary sealing pressure ring body for the controller cable to pass through.

[0014] In one embodiment, the secondary locking claw at the controller end includes: an elastic locking claw base ring, an elastic locking claw support group, and an elastic locking claw extrusion clamping claw; the elastic locking claw support group includes a plurality of elastic locking claw supports;

[0015] The elastic locking claw support includes an elastic locking claw support column and an elastic locking claw stress release groove; there is a gap between adjacent elastic locking claw support columns; the elastic locking claw stress release groove is located at the intersection of the outer diameter of the elastic locking claw support and the elastic locking claw base ring, and the elastic locking claw stress release groove has an arc shape;

[0016] The elastic locking claw extruding clamping claw comprises an elastic locking claw inclined surface, an elastic locking claw end surface, an elastic locking claw clamping head, and an elastic locking claw threading hole; the elastic locking claw inclined surface is arranged on the outer diameter of the elastic locking claw extruding clamping claw, and the elastic locking claw threading hole is arranged on the inner diameter of the elastic locking claw extruding clamping claw; an elastic locking claw clamping head is arranged at the elastic locking claw threading hole near the elastic locking claw end surface; the elastic locking claw clamping head has an arc shape.

[0017] In one embodiment, the sensor end primary protection device includes a sensor end primary pressure ring, a sensor end elastic sealing sleeve, and a sensor end primary gasket, and the sensor end primary protection device is close to the end of the dedicated connector; the end of the sensor cable extends into the dedicated connector and passes through the sensor end primary pressure ring, the sensor end elastic sealing sleeve, and the sensor end primary gasket in sequence;

[0018] A sensor end locking nut is also installed at the end of the special connector. The axial compression of the elastic sealing sleeve at the sensor end is controlled by the tightening torque of the sensor end locking nut. The elastic sealing sleeve at the sensor end is deformed so that the outer diameter of the elastic sealing sleeve at the sensor end is tightly squeezed against the inner hole wall of the special connector, and the inner diameter is tightly squeezed against the sensor cable, so as to achieve the sealing of the inner diameter and outer diameter of the elastic sealing sleeve at the sensor end and the locking and compression of the sensor cable.

[0019] In one embodiment, the secondary protection device at the sensor end includes a secondary pressure ring at the sensor end and a secondary locking claw at the sensor end; a sensor end positioning step is provided on the inner hole wall of the dedicated connector, and the sensor end positioning step is used to realize the axial positioning of the secondary locking claw at the sensor end; the axial tightening pressure generated by the locking nut at the sensor end is transmitted to the secondary locking claw at the sensor end through the secondary pressure ring at the sensor end, so that the secondary locking claw at the sensor end is elastically deformed in the inner diameter direction to compress the sensor cable.

[0020] In one embodiment, the cable-specific connection quick plug includes a controller-end cable-specific quick plug and a sensor-end cable-specific quick plug. The controller-end cable-specific quick plug is connected to the controller cable, and the sensor-end cable-specific quick plug is connected to the sensor cable. After the controller-end cable-specific quick plug and the sensor-end cable-specific quick plug are connected, an anti-corrosion sealant sealing layer is provided on the outside.

[0021] In one embodiment, the dedicated connector also includes a dedicated connector shell, and the dedicated connector shell is axially provided with a through hole, and the through hole includes a controller end locking nut mounting hole, a controller end mounting hole, a sensor end mounting hole, a quick-plug mounting hole, and a sensor end locking nut mounting hole; a controller end primary protection device and a controller end secondary protection device are arranged in the controller end mounting hole, and a sensor end primary protection device and a sensor end secondary protection device are arranged in the sensor end mounting hole; a cable-specific connection quick plug is arranged in the quick-plug mounting hole; a controller end connecting thread is arranged on the inner wall of the controller end locking nut mounting hole for installing the controller end locking nut; a sensor end connecting thread is arranged on the inner wall of the sensor end locking nut mounting hole for installing the sensor end locking nut;

[0022] The axial radii of the controller end mounting hole and the quick-plug mounting hole are different, forming a positioning step at the controller end; the axial radii of the sensor end mounting hole and the quick-plug mounting hole are different, forming a positioning step at the sensor end.

[0023] In one embodiment, the controller cable protection system includes a hose compression nut and a controller cable protection hose; the controller cable protection hose is sleeved on the outside of the controller cable, and the hose compression nut is connected to the controller end locking nut to compress the end of the controller cable protection hose so that the controller cable protection hose is tightly connected to the dedicated connector.

[0024] In one embodiment, the sensor cable protection system includes a spring protection cover protection head and a sensor cable spring protection cover; the end of the spring protection cover protection head extends into the central through hole of the sensor end locking nut; the sensor cable spring protection cover is sleeved on the outside of the sensor cable, and one end of the sensor cable spring protection cover is inserted into the interior of the spring protection cover protection head.

[0025] Compared with the prior art, this application has the following beneficial effects:

[0026] 1. This application implements a three-level sealing structure to achieve redundant sealing protection. The first level of sealing is for corrosion protection, ensuring that the cable connector is isolated from the external corrosive medium in the corrosive coal mine underground environment, ensuring that the inside of the connector is not corroded; the second level of sealing protection is for waterproof and dustproof protection, preventing water and dust from entering the inside of the connector, and the third level of sealing protection is mainly to prevent the failure of the first two levels of protection, and to do the final dust and waterproof protection, ensuring that the cable connector inside the cable connector is reliably connected and not disturbed by water and dust.

[0027] 2. This application realizes multi-level protection inside and outside to achieve the super tensile performance of the connector. The connector has an inner ring tensile protection system and an outer ring tensile protection system, and adopts a two-level tensile connection design. The first-level tensile structure has a certain toughness to protect the cable from being pulled, and the second-level tensile structure can firmly clamp the cable. The arc-shaped structure design ensures that the cable can be clamped and does not change in displacement, so that the connector can withstand a large tensile force and avoid loosening or breaking of the joint due to excessive tension.

[0028] 3. This application realizes flexible layout and has earthquake resistance. The connector adopts earthquake resistance design, and the cable is designed with protective hose and spring sleeve outside to prevent smashing, pressure and collision. A certain margin is reserved for the cable in the hose to ensure that the cable is always in a relaxed state to avoid vibration causing stress on the cable and affecting communication transmission. Inside the connecting machine, the two cables are connected to the machine with a special plug-in connector, which is sealed with sealant after installation. At the same time, a certain length of cable is reserved in the connecting machine to ensure that the cable joint is not easily damaged during vibration, so that the connector can operate stably in the vibration environment of the coal mine, and is not easily affected by external vibration, thereby improving the earthquake resistance of the connector.

[0029] In summary, this application effectively solves many problems of cable connectors in the existing underground working environment of coal mines, provides reliable technical support for the intelligence and data transmission of underground equipment in coal mines, helps to improve the stability, safety and quality of data transmission of equipment, and brings more technological advances to the coal mining industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present application may be better understood by referring to the following description given in conjunction with the accompanying drawings, which together with the following detailed description are included in this specification and form a part of this specification. In the drawings:

[0031] Figure 1 The schematic diagram of the structure of the dedicated connector device for underground coal mine sensors is shown;

[0032] Figure 2 A schematic diagram of the structure of a dedicated connector is shown;

[0033] Figure 3 An exploded view of the structure of the dedicated connector is shown;

[0034] Figure 4 A schematic diagram of the structure of the secondary pressure ring body at the controller end is shown;

[0035] Figure 5 A schematic diagram of the structure of the secondary locking claw at the controller end is shown;

[0036] Figure 6 A schematic diagram of the structure of a dedicated connector housing is shown;

[0037] Figure 7 A schematic diagram of the installation of a dedicated connector housing is shown;

[0038] Figure 8 A schematic diagram of the structure of the controller cable protection system is shown;

[0039] Fig. 9 A structural schematic diagram of a sensor cable protection system is shown.

[0040] Reference numerals:

[0041] 1—Sensor cable protection system, 2—Special connector, 3—Controller cable protection system, 4—Controller, 5—Fixing bolt, 6—Rubber gasket, 7—Drilling rig host;

[0042] 11—sensor cable, 12—sensor, 13—spring protective cover of sensor cable, 14—protective head of spring protective cover;

[0043] 21—locking nut at sensor end, 22—first mounting hole, 23—special connector housing, 24—locking nut at controller end, 25—first level protection device at controller end, 26—second level protection device at controller end, 27—special cable connection quick plug, 28—second level protection device at sensor end, 29—first level protection device at sensor end, 210—second mounting hole;

[0044] 231—first mounting earring, 232—sensor end locking nut mounting hole, 233—sensor end mounting hole, 234—sensor end positioning step, 235—controller end positioning step, 236—controller end mounting hole, 237—controller end locking nut mounting hole, 238—second mounting earring, 239—quick-insert mounting hole;

[0045] 251—primary pressure ring at the controller end, 252—elastic sealing sleeve at the controller end, 253—primary gasket at the controller end;

[0046] 261—secondary pressure ring at the controller end, 262—secondary locking claw at the controller end;

[0047] 2611—secondary pressure ring body at the controller end, 2612—outer diameter sealing ring of the secondary pressure ring at the controller end, 2613—inner diameter sealing ring of the secondary pressure ring at the controller end;

[0048] 26111—secondary sealing ring body, 26112—secondary sealing ring outer diameter sealing groove, 26113—secondary sealing ring cone surface, 26114—secondary sealing ring center through hole, 26115—secondary sealing ring inner diameter sealing groove;

[0049] 2621—elastic locking claw base ring, 2622—elastic locking claw support group, 2623—elastic locking claw extrusion clamping claw;

[0050] 26221—gap, 26222—elastic locking claw support column, 26223—elastic locking claw stress relief groove;

[0051] 26231—elastic locking claw inclined surface, 26232—elastic locking claw end surface, 26233—elastic locking claw clamping head, 26234—elastic locking claw threading hole;

[0052] 271—Special quick-connect for controller-side cable, 272—Special quick-connect for sensor-side cable, 273—Anti-corrosion sealant sealant layer;

[0053] 281—secondary pressure ring at the sensor end, 282—secondary locking claw at the sensor end;

[0054] 2811—sensor end secondary pressure ring body, 2812—sensor end secondary pressure ring outer diameter sealing ring, 2813—sensor end secondary pressure ring inner diameter sealing ring;

[0055] 291—primary pressure ring at the sensor end, 292—elastic sealing sleeve at the sensor end, 293—primary gasket at the sensor end;

[0056] 31—controller cable, 32—controller cable protection hose, 33—hose connector, 34—hose tightening nut. DETAILED DESCRIPTION

[0057] The exemplary embodiments of the present application will be described below in conjunction with the accompanying drawings. For the sake of clarity and conciseness, not all features of the actual embodiments are described in the specification. However, it should be understood that many implementation-specific decisions can be made in the process of developing any such actual embodiments in order to achieve the specific goals of the developer, and these decisions may vary from embodiment to embodiment.

[0058] It is also necessary to explain here that, in order to avoid obscuring the present application due to unnecessary details, only the device structure closely related to the scheme according to the present application is shown in the drawings, while other details that are not closely related to the present application are omitted.

[0059] It should be understood that the present application is not limited to the described implementation forms due to the following description with reference to the accompanying drawings. In this article, where feasible, the embodiments can be combined with each other, features between different embodiments can be replaced or borrowed, and one or more features can be omitted in one embodiment.

[0060] In order to solve the problems existing in the existing sensor connectors, the present application provides a special connector device for coal mine underground sensors, which has the characteristics of waterproof, dustproof, corrosion-resistant, high temperature resistant, vibration-resistant, etc., and can ensure the stable connection between the sensor and other systems, and ensure the accuracy and reliability of data transmission, so as to meet the high requirements of the coal mine working environment for sensor connectors and improve the efficiency and reliability of coal mine safety monitoring and intelligent equipment.

[0061] Figure 1 The schematic diagram of the structure of the special connector device for coal mine underground sensors is shown in Figure 1 , a special connector device for underground coal mine sensors, including: a special connector 2, a sensor cable protection system 1 and a controller cable protection system 3; the special connector 2 is used to realize the connection between the sensor cable 11 and the controller cable 31, the sensor cable protection system 1 is used to protect the sensor cable 11, and the controller cable protection system 3 is used to protect the controller cable 31;

[0062] Figure 2 shows a schematic diagram of the structure of a dedicated connector, see Figure 2 The dedicated connector 2 includes internal devices, which include a first-level protection device 25 on the controller end, a second-level protection device 26 on the controller end, a cable-specific quick connection plug 27, a second-level protection device 28 on the sensor end, and a first-level protection device 29 on the sensor end; the first-level protection device 25 on the controller end and the second-level protection device 26 on the controller end are used to protect the connection end between the dedicated connector 2 and the controller cable 31, and the second-level protection device 28 on the sensor end and the first-level protection device 29 on the sensor end are used to protect the connection end between the dedicated connector 2 and the sensor cable 11; the cable-specific quick connection plug 27 is used to realize the connection between the sensor cable 11 and the controller cable 31.

[0063] In one embodiment, Figure 3 shows an exploded view of the dedicated connector, see Figure 3 The controller-side primary protection device 25 includes a controller-side primary pressure ring 251, a controller-side elastic sealing sleeve 252, and a controller-side primary gasket 253. The controller-side primary protection device 25 is close to the end of the dedicated connector 2. The end of the controller cable 31 extends into the dedicated connector 2 and passes through the controller-side primary pressure ring 251, the controller-side elastic sealing sleeve 252, and the controller-side primary gasket 253 in sequence.

[0064] A controller-end locking nut 24 is also installed at the end of the dedicated connector 2. The axial compression of the elastic sealing sleeve 252 at the controller end is controlled by the tightening torque of the locking nut 24 at the controller end. The elastic sealing sleeve 252 at the controller end is deformed so that the outer diameter of the elastic sealing sleeve 252 at the controller end is tightly squeezed against the inner hole wall of the dedicated connector 2, and the inner diameter is tightly squeezed against the controller cable 31, so as to achieve the sealing of the inner diameter and outer diameter of the elastic sealing sleeve 252 at the controller end and the locking and compression of the controller cable 31.

[0065] In this embodiment, after the locking nut 24 at the controller end is tightened, a gap of 2-5 cm is left between the end face of the dedicated connector 2 to ensure that the locking nut 24 at the controller end and the dedicated connector 2 are tightened in place and that the elastic sealing sleeve 252 at the controller end is compressed and deformed in place.

[0066] In one embodiment, see Figure 3 The secondary protection device 26 at the controller end includes a secondary pressure ring 261 at the controller end and a secondary locking claw 262 at the controller end; a controller end positioning step 235 is provided on the inner hole wall of the dedicated connector 2, and the controller end positioning step 235 is used to realize the axial positioning of the secondary locking claw 262 at the controller end; the axial tightening pressure generated by the locking nut 24 at the controller end is transmitted to the secondary locking claw 262 at the controller end through the secondary pressure ring 261 at the controller end, so that the secondary locking claw 262 at the controller end is elastically deformed in the inner diameter direction to compress the controller cable 31.

[0067] In one embodiment, see Figure 3 The controller-end secondary pressure ring 261 includes a controller-end secondary pressure ring body 2611, a controller-end secondary pressure ring outer diameter sealing ring 2612, and a controller-end secondary pressure ring inner diameter sealing ring 2613;

[0068] Figure 4 The schematic diagram of the structure of the secondary pressure ring body at the controller end is shown in Figure 4The controller-end secondary pressure ring body 2611 includes a secondary sealing pressure ring body 26111, a secondary sealing pressure ring outer diameter sealing groove 26112, a secondary sealing pressure ring conical surface 26113, a secondary sealing pressure ring center through hole 26114, and a secondary sealing pressure ring inner diameter sealing groove 26115. A controller-end secondary pressure ring inner diameter sealing ring 2613 is arranged in the secondary sealing pressure ring inner diameter sealing groove 26115; a secondary sealing pressure ring outer diameter sealing groove 26112 is arranged in the outer diameter direction of the secondary sealing pressure ring body 26111, and a secondary sealing pressure ring inner diameter sealing groove 26115 is arranged in the secondary sealing pressure ring inner diameter sealing groove 26115. A secondary pressure ring outer diameter sealing ring 2612 of the controller end is arranged in the sealing pressure ring outer diameter sealing groove 26112; a secondary sealing pressure ring inner diameter sealing groove 26115 is arranged on the inner diameter direction of the secondary sealing pressure ring body 26111, and a secondary sealing pressure ring conical surface 26113 is arranged below the secondary sealing pressure ring body 26111 for use with the secondary locking claw 262 of the controller end; a secondary sealing pressure ring center through hole 26114 is arranged in the center of the secondary sealing pressure ring body 26111 for the controller cable 31 to pass through.

[0069] Specifically, the controller end elastic sealing sleeve 252 is made of a vulcanization-resistant rubber material, has anti-H2S corrosion performance, has a certain toughness, and undergoes elastic deformation.

[0070] In one embodiment, Figure 5 The schematic diagram of the structure of the secondary locking claw at the controller side is shown in FIG. Figure 5 The controller-side secondary locking claw 262 includes: an elastic locking claw base ring 2621, an elastic locking claw support group 2622, and an elastic locking claw extrusion clamping claw 2623; the elastic locking claw support group 2622 includes a plurality of elastic locking claw supports, for example, 8 elastic locking claw supports are provided;

[0071] The elastic locking claw support includes an elastic locking claw support column 26222 and an elastic locking claw stress release groove 26223; there is a gap 26221 between adjacent elastic locking claw support columns 26222, and the gap size can be 2-4mm to ensure that the inner diameter can be reduced during extrusion deformation; the elastic locking claw stress release groove 26223 is located at the intersection of the outer diameter of the elastic locking claw support and the elastic locking claw base ring 2621, and the elastic locking claw stress release groove 26223 has an arc shape to avoid stress concentration;

[0072] The elastic locking claw extruding and clamping claw 2623 includes an elastic locking claw inclined surface 26231, an elastic locking claw end surface 26232, an elastic locking claw clamping head 26233, and an elastic locking claw threading hole 26234; the elastic locking claw inclined surface 26231 is arranged on the outer diameter of the elastic locking claw extruding and clamping claw 2623, and the elastic locking claw threading hole 26234 is arranged on the inner diameter of the elastic locking claw extruding and clamping claw 2623; an elastic locking claw clamping head 26233 is arranged at the elastic locking claw threading hole 26234 near the elastic locking claw end surface 26232; the elastic locking claw clamping head 26233 has an arc shape, which can realize the clamping and fixing of the cable on the one hand, and avoid damage to the cable during clamping on the other hand.

[0073] In this embodiment, the secondary locking claw at the controller end is compressed by axial extrusion of the secondary pressure ring at the controller end, and the axial tightening pressure is transmitted to the elastic locking claw inclined surface through the secondary pressure ring at the controller end, so that the elastic locking claw support column of the secondary locking claw at the controller end is elastically deformed in the inner diameter direction, radially compressing the cable to fix the cable.

[0074] In one embodiment, see Figure 3 The sensor end primary protection device 29 includes a sensor end primary pressure ring 291, a sensor end elastic sealing sleeve 292, and a sensor end primary gasket 293. The sensor end primary protection device 29 is close to the end of the dedicated connector 2. The end of the sensor cable 11 extends into the dedicated connector 2 and passes through the sensor end primary pressure ring 291, the sensor end elastic sealing sleeve 292, and the sensor end primary gasket 293 in sequence.

[0075] A sensor end locking nut 21 is also installed at the end of the special connector 2. The axial compression of the sensor end elastic sealing sleeve 292 is controlled by the tightening torque of the sensor end locking nut 21. The sensor end elastic sealing sleeve 292 is deformed so that the outer diameter of the sensor end elastic sealing sleeve 292 is tightly squeezed against the inner hole wall of the special connector 2, and the inner diameter is tightly squeezed against the sensor cable 11, so as to achieve the sealing of the inner diameter and outer diameter of the sensor end elastic sealing sleeve 292 and the locking and compression of the sensor cable 11.

[0076] In one embodiment, see Figure 3 The secondary protection device 28 at the sensor end includes a secondary pressure ring 281 at the sensor end and a secondary locking claw 282 at the sensor end; a sensor end positioning step 234 is provided on the inner hole wall of the dedicated connector 2, and the sensor end positioning step 234 is used to realize the axial positioning of the secondary locking claw 282 at the sensor end; the axial tightening pressure generated by the locking nut 21 at the sensor end is transmitted to the secondary locking claw 282 at the sensor end through the secondary pressure ring 281 at the sensor end, so that the secondary locking claw 282 at the sensor end is elastically deformed in the inner diameter direction to compress the sensor cable 11.

[0077] Here, the structure of the secondary pressure ring 281 and the secondary locking claw 282 on the sensor end is the same as that of the secondary pressure ring 261 and the secondary locking claw 261 on the controller end. The specific structure and implementation effect can be found in the above-mentioned embodiment and will not be repeated here.

[0078] In one embodiment, see Figure 3 The cable-specific connection quick plug 27 includes a controller-end cable-specific quick plug 271 and a sensor-end cable-specific quick plug 272. The controller-end cable-specific quick plug 271 is connected to the controller cable 31, and the sensor-end cable-specific quick plug 272 is connected to the sensor cable 11. After the controller-end cable-specific quick plug 271 and the sensor-end cable-specific quick plug 272 are connected, an anti-corrosion sealant sealing layer 273 is provided on the outside.

[0079] Here, the controller-end cable dedicated quick connector 271 is a quick connector female connector, and the sensor-end cable dedicated quick connector 272 is a quick connector male connector. An interference fit is used between the male and female connectors to achieve a reliable connection between the sensor-end cable 11 and the controller-end cable 31. After completion, a layer of anti-corrosion sealant is evenly applied on the outside to achieve sealing and waterproof performance at the joint.

[0080] In one embodiment, Figure 6 shows a schematic diagram of the structure of the dedicated connector housing, see Figure 6 The dedicated connector 2 also includes a dedicated connector shell 23, and the dedicated connector shell 23 is provided with a through hole in the axial direction, and the through hole includes a controller-end locking nut mounting hole 237, a controller-end mounting hole 236, a sensor-end mounting hole 233, a quick-insert mounting hole 239, and a sensor-end locking nut mounting hole 232; a controller-end primary protection device 25 and a controller-end secondary protection device 26 are arranged in the controller-end mounting hole 236, and a sensor-end primary protection device 29 and a sensor-end secondary protection device 28 are arranged in the sensor-end mounting hole 233; a cable-specific quick-insert 27 is arranged in the quick-insert mounting hole 239; a controller-end connecting thread is arranged on the inner wall of the controller-end locking nut mounting hole 237 for installing the controller-end locking nut 24; a sensor-end connecting thread is arranged on the inner wall of the sensor-end locking nut mounting hole 232 for installing the sensor-end locking nut 21;

[0081] The controller end mounting hole 236 and the quick-insert mounting hole 239 have different axial radii, forming a controller end positioning step 235 ; the sensor end mounting hole 233 and the quick-insert mounting hole 239 have different axial radii, forming a sensor end positioning step 234 .

[0082] Further, Figure 7 A schematic diagram of the dedicated connector housing installation is shown. Figure 6 and Figure 7The dedicated connector housing 23 is also provided with a first mounting earring 231 and a second mounting earring 238. The first mounting earring 231 is provided with a first mounting hole 22, and the second mounting earring 238 is provided with a second mounting hole 210. The first mounting hole 22 and the second mounting hole 210 are installed on the drilling rig mainframe 7 through fixing bolts 5 and rubber gaskets 6.

[0083] In one embodiment, Figure 8 The schematic diagram of the controller cable protection system is shown in Figure 8 The controller cable protection system 3 includes a hose clamping nut 34 and a controller cable protection hose 32; the controller cable protection hose 32 is sleeved on the outside of the controller cable 31, and the hose clamping nut 34 is connected to the controller end locking nut 24 to clamp the end of the controller cable protection hose 32 so that the controller cable protection hose 32 is tightly connected to the dedicated connector 2.

[0084] In one embodiment, Fig. 9 shows a schematic diagram of the sensor cable protection system, see Fig. 9 The sensor cable protection system 1 includes a spring protection cover protection head 14 and a sensor cable spring protection cover 13; the end of the spring protection cover protection head 14 extends into the central through hole of the sensor end locking nut 21; the sensor cable spring protection cover 13 is sleeved on the outside of the sensor cable 11, and one end of the sensor cable spring protection cover 13 is inserted into the inside of the spring protection cover protection head 14, ensuring that all sensor cables 11 between the dedicated connector 2 and the sensor 12 are effectively protected.

[0085] In summary, the special connector device for coal mine underground sensors of the present application forms a three-level sealing coordination structure, which mainly includes the first-level sealing protection, the second-level sealing protection, and the third-level sealing protection.

[0086] The first-level sealing protection mainly includes the first-level protection device on the controller end and the first-level protection device on the sensor end. The elastic sealing sleeve is squeezed and deformed so that the annular space gap between the dedicated connector and the cable is filled with the elastic sealing sleeve, ensuring that the cable is fixed and the annular space gap is sealed, preventing impurities such as water, coal slag, and corrosive liquids from entering the dedicated connector, thus achieving the first-level sealing protection.

[0087] The second-level sealing protection mainly includes the second-level protection device on the controller end and the second-level protection device on the sensor end. The second-level sealing protection between the dedicated connector and the cable is achieved through the deformation of the sealing ring at the outer diameter sealing groove of the secondary sealing pressure ring and the inner diameter sealing groove of the secondary sealing pressure ring set on the secondary sealing cover of the dedicated connector.

[0088] The third level of sealing protection is mainly the special quick-plug sealing of the cable. It includes the interference fit between the special quick-plug male and the special quick-plug female to achieve the last layer of sealing, and evenly apply a layer of anti-corrosion glue sealant on the outside of the special quick-plug male and the special quick-plug female to form a special quick-plug glue seal layer to prevent water and impurities from entering the cable connection.

[0089] In addition, the special connector device for coal mine underground sensors of the present application can form internal and external multi-level tensile protection, mainly including an inner ring tensile protection system and an outer ring tensile protection system.

[0090] The outer ring tensile protection system is mainly composed of sensor cable protection sleeve, spring protection sleeve protection head, special connector housing, controller cable protection hose, hose connector, hose compression nut, etc. The controller cable protection hose is used to achieve tensile protection between the controller and the special connector; the sensor cable protection sleeve and spring protection sleeve protection head are used to achieve tensile protection between the sensor and the special connector. The outer ring tensile protection system mainly bears almost all external forces such as tension and bending force, and has functions such as waterproof, anti-smashing, and anti-pressure, which protects the entire cable.

[0091] The inner ring tensile protection system mainly ensures that the cable reserves sufficient margin to ensure that the cable is almost not subjected to external forces, thus achieving cable protection. The controller cable protection hose is required to be larger than the controller cable diameter, and the margin is half of the controller cable diameter. During installation, the controller cable length should be 10% longer than the controller cable protection hose length to ensure that the controller cable is not subjected to external forces. Sensor cables are generally shorter in length, generally 0.2-0.8 meters, for ease of maintenance and replacement. The sensor cable protective cover of the sensor cable jacket has weak tensile strength. Therefore, the sensor cable is required to use armored explosion-proof cables to ensure that the sensor cable is not broken.

[0092] The special connector device for coal mine underground sensors of the present application can form an anti-seismic system, including two parts: special connector anti-seismic and cable anti-seismic.

[0093] The anti-seismic protection of special connectors mainly includes anti-seismic protection of special quick-plug connections and anti-seismic protection of cables inside special connectors; the anti-seismic protection of special quick-plug connections is mainly achieved by using rubber materials for special quick-plug male connectors and special quick-plug female connectors, and applying anti-corrosion sealant on the outside to form a special connection quick-plug rubber seal layer to reduce the impact of vibration on the connection. A certain length of cable is reserved inside the special connector to keep it in a relaxed state to avoid vibration from breaking the cable at the connection. At the same time, the housing of the special sensor is fixedly installed on the mainframe of the drilling rig, with a rubber gasket in between. The special connector is installed on the body of the drilling rig through fixing bolts. The rubber gasket performs primary shock absorption to reduce the vibration of the mainframe of the drilling rig transmitted to the special connector.

[0094] Cable seismic protection is mainly achieved through the joint protection of the sensor-end protection system and the controller-end protection system. The sensor-end protection system uniformly arranges the sensor cables on the drilling rig according to a certain path and fixes them firmly, leaving a small amount of expansion and contraction between adjacent fixing points to avoid stress on the sensor cables. The controller-end protection system absorbs part of the vibration through the controller cable protection hose. A certain margin is reserved for the controller-end cable inside the controller cable protection hose. At the same time, the controller cable is squeezed into the controller cable protection hose to limit the activity space of the controller-end cable, ensuring that the controller cable can absorb a certain amount of vibration energy during vibration, thereby achieving seismic protection for the entire cable.

[0095] The embodiment of the present application also provides a method for installing a special connector device for underground coal mine sensors. The sensor connector of the underground coal mine drill is specially designed to achieve reliable and stable connection between cables and ensure normal communication in the harsh working environment of the underground coal mine. Due to the small space underground in the coal mine and the compact equipment structure, the sensor connector of the underground coal mine drill has a small structure and needs to be installed according to a certain process method to achieve stable operation of the sensor connector of the underground coal mine drill in the coal mine. It mainly includes the following steps:

[0096] Step 1: First install the controller cable protection system. According to the equipment space size, the cable starting point and end point, reasonably arrange the routing direction and path of the controller cable. Insert the controller cable protection hose into the controller cable, and after arranging the path, firmly fix the controller cable protection hose.

[0097] Step 2: Install the connector of the controller cable protection hose onto the dedicated connector through the hose compression nut.

[0098] Step 3: Screw the controller cable into the controller cable protection hose so that the controller cable has a certain length margin and the movable space of the controller cable is limited.

[0099] Step 4: Install the sensor cable protection system. Arrange the sensor cable routing direction and path reasonably according to the site conditions. Insert the sensor cable spring protection cover into the sensor cable and fix it firmly.

[0100] Step 5: Install the spring protective cover protective head into the locking nut at the sensor end.

[0101] Step 6, the outer diameter sealing ring of the secondary pressure ring at the controller end and the inner diameter sealing ring of the secondary pressure ring at the controller end are respectively installed to the secondary pressure ring at the controller end; the outer diameter sealing ring of the secondary pressure ring at the sensor end and the inner diameter sealing ring of the secondary pressure ring at the sensor end are respectively installed to the secondary pressure ring at the sensor end;

[0102] Step 7. Pass the controller cable through the locking nut on the controller end, the first-level protective device on the controller end, and the second-level protective device on the controller end in sequence.

[0103] Step 8. Tighten the locking nut on the controller end and use a torque wrench to control the torque to 305-315Nm. After installation, check that the gap between the locking nut on the controller end and the housing of the dedicated connector is 2-7mm.

[0104] Step 9. Install the controller cable into the dedicated quick-connect connector on the controller end to ensure that it is securely installed.

[0105] Step 10, the outer diameter sealing ring of the secondary pressure ring at the sensor end and the inner diameter sealing ring of the secondary pressure ring at the sensor end are respectively installed on the secondary pressure ring at the sensor end; the outer diameter sealing ring of the secondary pressure ring at the sensor end and the inner diameter sealing ring of the secondary pressure ring at the sensor end are respectively installed on the secondary pressure ring at the sensor end;

[0106] Step 11: The sensor cable passes through the locking nut at the sensor end, the primary protection device at the sensor end, and the secondary protection device at the sensor end in sequence;

[0107] Step 12: Install the sensor cable into the dedicated quick connector at the sensor end, leaving enough room for the cable and ensuring that it is securely installed.

[0108] Step 13: Insert the sensor cable plug into the controller cable plug, make sure it is firmly in place, and apply a layer of anti-corrosion sealant evenly on the outer layer to form a uniform anti-corrosion sealant layer. Insert it into the dedicated connector housing, and insert all the remaining cable length into the dedicated connector housing.

[0109] Step 14. Tighten the locking nut at the sensor end and use a torque wrench to control the torque to 305-315Nm. After installation, check that the gap between the locking nut at the sensor end and the housing of the dedicated connector is 2-7mm.

[0110] Step 15: Recheck all threaded connections to ensure that the torque reaches the specified value.

[0111] The above are only various implementations of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A special connector device for underground coal mine sensors, characterized in that: include: A dedicated connector (2), a sensor cable protection system (1) and a controller cable protection system (3); the dedicated connector (2) is used to achieve connection between a sensor cable (11) and a controller cable (13); the sensor cable protection system (1) is used to protect the sensor cable (11); and the controller cable protection system (3) is used to protect the controller cable (31); The dedicated connector (2) includes an internal device, and the internal device includes a controller-side primary protection device (25), a controller-side secondary protection device (26), a cable-specific quick-connect plug (27), a sensor-side secondary protection device (28), and a sensor-side primary protection device (29); the controller-side primary protection device (25) and the controller-side secondary protection device (26) are used to protect the connection end between the dedicated connector (2) and the controller cable (31), and the sensor-side secondary protection device (28) and the sensor-side primary protection device (29) are used to protect the connection end between the dedicated connector (2) and the sensor cable (11); the cable-specific quick-connect plug (27) is used to achieve the connection between the sensor cable (11) and the controller cable (31).

2. The device according to claim 1, characterized in that The controller-end primary protection device (25) comprises a controller-end primary pressure ring (251), a controller-end elastic sealing sleeve (252), and a controller-end primary gasket (253); the controller-end primary protection device (25) is close to the end of the dedicated connector (2); the end of the controller cable (31) extends into the dedicated connector (2) and passes through the controller-end primary pressure ring (251), the controller-end elastic sealing sleeve (252), and the controller-end primary gasket (253) in sequence; A controller-end locking nut (24) is also installed at the end of the dedicated connector (2). The axial compression of the controller-end elastic sealing sleeve (252) is controlled by the tightening torque of the controller-end locking nut (24). The controller-end elastic sealing sleeve (252) is deformed so that the outer diameter of the controller-end elastic sealing sleeve (252) is tightly pressed against the inner hole wall of the dedicated connector (2), and the inner diameter is tightly pressed against the controller cable (31), so as to achieve the sealing of the inner diameter and outer diameter of the controller-end elastic sealing sleeve (252) and the locking and tightening of the controller cable (31).

3. The device according to claim 1, characterized in that The controller-end secondary protection device (26) comprises a controller-end secondary pressure ring (261) and a controller-end secondary locking claw (262); a controller-end positioning step (235) is provided on the inner hole wall of the dedicated connector (2), and the controller-end positioning step (235) is used to realize the axial positioning of the controller-end secondary locking claw (262); the axial tightening pressure generated by the controller-end locking nut (24) is transmitted to the controller-end secondary locking claw (262) through the controller-end secondary pressure ring (261), so that the controller-end secondary locking claw (262) is elastically deformed in the inner diameter direction to compress the controller cable (31).

4. The device according to claim 3, characterized in that The controller-end secondary pressure ring (261) comprises a controller-end secondary pressure ring body (2611), a controller-end secondary pressure ring outer diameter sealing ring (2612), and a controller-end secondary pressure ring inner diameter sealing ring (2613); The controller-end secondary pressure ring body (2611) comprises a secondary sealing pressure ring body (26111), a secondary sealing pressure ring outer diameter sealing groove (26112), a secondary sealing pressure ring conical surface (26113), a secondary sealing pressure ring central through hole (26114), and a secondary sealing pressure ring inner diameter sealing groove (26115), wherein the controller-end secondary pressure ring inner diameter sealing ring (2613) is arranged in the secondary sealing pressure ring inner diameter sealing groove (26115); the secondary sealing pressure ring outer diameter sealing groove (26112) is arranged in the outer diameter direction of the secondary sealing pressure ring body (26111), and the secondary sealing pressure ring inner diameter sealing ring (26115) is arranged in the secondary sealing pressure ring inner diameter sealing groove (26115). The controller-end secondary pressure ring outer diameter sealing ring (2612) is arranged in the ring outer diameter sealing groove (26112); the secondary sealing pressure ring inner diameter sealing groove (26115) is arranged on the inner diameter direction of the secondary sealing pressure ring body (26111); the secondary sealing pressure ring conical surface (26113) is arranged below the secondary sealing pressure ring body (26111) for use with the controller-end secondary locking claw (262); the secondary sealing pressure ring center through hole (26114) is arranged at the center of the secondary sealing pressure ring body (26111) for the controller cable (31) to pass through.

5. The device according to claim 3, characterized in that The controller-end secondary locking claw (262) comprises: an elastic locking claw base ring (2621), an elastic locking claw support group (2622), and an elastic locking claw extrusion clamping claw (2623); the elastic locking claw support group (2622) comprises a plurality of elastic locking claw supports; The elastic locking claw support comprises an elastic locking claw support column (26222) and an elastic locking claw stress release groove (26223); there is a gap (26221) between adjacent elastic locking claw support columns (26222); the elastic locking claw stress release groove (26223) is located at the intersection of the outer diameter of the elastic locking claw support and the elastic locking claw base ring (2621), and the elastic locking claw stress release groove (26223) has an arc shape; The elastic locking claw extruding clamping claw (2623) comprises an elastic locking claw inclined surface (26231), an elastic locking claw end surface (26232), an elastic locking claw clamping head (26233), and an elastic locking claw threading hole (26234); the elastic locking claw inclined surface (26231) is arranged on the outer diameter of the elastic locking claw extruding clamping claw (2623), and the elastic locking claw threading hole (26234) is arranged on the inner diameter of the elastic locking claw extruding clamping claw (2623); the elastic locking claw clamping head (26233) is arranged at the elastic locking claw threading hole (26234) near the elastic locking claw end surface (26232); the elastic locking claw clamping head (26233) has an arc shape.

6. The device according to claim 1, characterized in that The sensor end primary protection device (29) comprises a sensor end primary pressure ring (291), a sensor end elastic sealing sleeve (292), and a sensor end primary gasket (293); the sensor end primary protection device (29) is close to the end of the dedicated connector (2); the end of the sensor cable (11) extends into the dedicated connector (2) and passes through the sensor end primary pressure ring (291), the sensor end elastic sealing sleeve (292), and the sensor end primary gasket (293) in sequence; A sensor end locking nut (21) is also installed at the end of the dedicated connector (2). The axial compression of the sensor end elastic sealing sleeve (292) is controlled by the tightening torque of the sensor end locking nut (21). The sensor end elastic sealing sleeve (292) is deformed so that the outer diameter of the sensor end elastic sealing sleeve (292) is tightly pressed against the inner hole wall of the dedicated connector (2), and the inner diameter is tightly pressed against the sensor cable (11), so as to achieve the sealing of the inner diameter and outer diameter of the sensor end elastic sealing sleeve (292) and the locking and pressing of the sensor cable (11).

7. The device according to claim 1, characterized in that The sensor end secondary protection device (28) comprises a sensor end secondary pressure ring (281) and a sensor end secondary locking claw (282); a sensor end positioning step (234) is provided on the inner hole wall of the dedicated connector (2), and the sensor end positioning step (234) is used to realize the axial positioning of the sensor end secondary locking claw (282); the axial tightening pressure generated by the sensor end locking nut (21) is transmitted to the sensor end secondary locking claw (282) through the sensor end secondary pressure ring (281), so that the sensor end secondary locking claw (282) is elastically deformed in the inner diameter direction to compress the sensor cable (11).

8. The device according to claim 1, characterized in that The cable-specific connection quick plug (27) comprises a controller-end cable-specific quick plug (271) and a sensor-end cable-specific quick plug (272); the controller-end cable-specific quick plug (271) is connected to the controller cable (31), and the sensor-end cable-specific quick plug (272) is connected to the sensor cable (11); after the controller-end cable-specific quick plug (271) and the sensor-end cable-specific quick plug (272) are connected, an anti-corrosion sealant sealing layer (273) is provided on the outside.

9. The device according to claim 1, characterized in that The dedicated connector (2) further comprises a dedicated connector housing (23), wherein the dedicated connector housing (23) is provided with a through hole in the axial direction, wherein the through hole comprises a controller end locking nut mounting hole (237), a controller end mounting hole (236), a sensor end mounting hole (233), a quick-insert mounting hole (239), and a sensor end locking nut mounting hole (232); the controller end mounting hole (236) is provided with the controller end primary protection device (25) and the controller end secondary protection device (26), and the sensor end mounting hole (233) is provided with the controller end primary protection device (25) and the controller end secondary protection device (26). The sensor end primary protection device (29) and the sensor end secondary protection device (28) are arranged in the controller end mounting hole (232); the cable dedicated quick plug (27) is arranged in the quick plug mounting hole (239); the controller end locking nut mounting hole (237) is provided with a controller end connecting thread on the inner wall thereof for installing the controller end locking nut (24); the sensor end locking nut mounting hole (232) is provided with a sensor end connecting thread on the inner wall thereof for installing the sensor end locking nut (21); The controller end mounting hole (236) and the quick-insert mounting hole (239) have different axial radii, forming a controller end positioning step (235); the sensor end mounting hole (233) and the quick-insert mounting hole (239) have different axial radii, forming a sensor end positioning step (234).

10. The device according to claim 1, characterized in that The controller cable protection system (3) comprises a hose clamping nut (34) and a controller cable protection hose (32); the controller cable protection hose (32) is sleeved on the outside of the controller cable (31), and the hose clamping nut (34) is connected to the controller end locking nut (24) to clamp the end of the controller cable protection hose (32) so that the controller cable protection hose (32) is tightly connected to the dedicated connector (2).

11. The device according to claim 1, characterized in that The sensor cable protection system (1) comprises a spring protection sleeve protection head (14) and a sensor cable spring protection sleeve (13); the end of the spring protection sleeve protection head (14) extends into the central through hole of the sensor end locking nut (21); the sensor cable spring protection sleeve (13) is sleeved on the outside of the sensor cable (11), and one end of the sensor cable spring protection sleeve (13) is inserted into the inside of the spring protection sleeve protection head (14).

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