Mining double-seal explosion-proof joint

Abstract

The utility model relates to the technical field of explosion-proof joints, in particular to a mining double-seal explosion-proof joint which comprises a joint body. The connector body is composed of a connecting hose, an outer protective pipe and two external thread connecting terminals, the connecting assembly comprises an outer sleeve, fillet pin blocks are arranged in second through grooves in a penetrating mode respectively, clamping grooves are formed in the outer walls of the internal thread connecting terminals and correspond to the evenly-arranged fillet pin blocks, and the outer sleeve is sleeved with the clamping grooves. The connector body is in threaded connection with the internal thread connection terminal through the external thread connection terminal, the horn sleeve moves towards the first spring and then drives the fillet pin block to extend towards the outer side of the outer sleeve through the T-shaped guide groove and the T-shaped sliding block of the inner inclined face of the horn sleeve, and after the external thread connection terminal and the internal thread connection terminal are connected in place, the horn sleeve is connected with the horn sleeve. And under the action of the first spring, the fillet pin block extends into the outer sleeve and is clamped in a clamping groove in the outer wall of the internal thread connection terminal, the effect of connection and fixation is achieved in a matched mode, connector loosening caused by vibration is prevented, and the connection firmness degree is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of explosion-proof joints, in particular to a double-sealed explosion-proof joint for mining. Background Art

[0002] Explosion-proof connectors are important electrical equipment accessories for explosion-proof cable installation and connection. They ensure the sealing and explosion-proof effect of cables in coal mine and other mining construction environments. Explosion-proof cable connectors can effectively prevent explosive gases from entering the equipment, thereby ensuring the safety of equipment and personnel.

[0003] A patent with announcement number CN 117628284 A discloses a double-seal explosion-proof joint, including an explosion-proof joint body, a pressure relief component is arranged on the right side of the explosion-proof joint body, the pressure relief component includes a pressure relief box, a buffer component is fixedly connected to the right side of the inner cavity of the pressure relief box, and a plug is fixedly connected to the left side of the buffer component. The present invention can relieve the circulating pressure by arranging the pressure relief component. At this time, the liquid pressure in the explosion-proof joint will be greater than the rebound force of the buffer component. At this time, the plug will be pushed out from the inside of the convex sealing ring. At this time, the liquid transported by the explosion-proof joint will flow into the pressure relief box, and the entered liquid will be discharged to the outside through the pressure relief hole. Through the setting of the buffer component, a certain rebound thrust can be applied to the plug, so that the transport pressure can be automatically identified according to the pressure of the liquid transported by the explosion-proof joint, and the pressure relief effect can be achieved in cooperation.

[0004] However, the existing explosion-proof joints cannot fix the cables passing through, and vibrations are usually generated at coal mine construction sites. Long-term vibrations can easily loosen the joints, thereby affecting the connection effect and resulting in poor connection protection. Therefore, a double-sealed explosion-proof joint for mining is proposed to address the above problems. Utility Model Content

[0005] In order to make up for the deficiencies of the prior art and to address the problems existing in the prior art, the utility model proposes a double-sealed explosion-proof joint for mining.

[0006] The technical solution adopted by the utility model to solve its technical problems is: a double-sealed explosion-proof joint for mining described in the utility model includes a joint body; the joint body is composed of a connecting hose, an outer protective tube and two externally threaded connecting terminals, and the two externally threaded connecting terminals are respectively connected to the two ends of the connecting hose, and a No. 1 hexagonal plate is installed on the two externally threaded connecting terminals, and an outer protective tube is installed between the two No. 1 hexagonal plates, and the center line of the outer protective tube coincides with the center line of the externally threaded connecting terminal, and two groups of connecting components are mirror-imaged on the two externally threaded connecting terminals, and a locking component is arranged on the outer protective tube;

[0007] The connecting assembly includes an outer sleeve, the outer sleeve coincides with the center line of the external threaded connection terminal, the side wall of the outer sleeve is evenly distributed with No. 2 through grooves, the No. 2 through grooves are respectively penetrated with rounded pin blocks, the outer side of the outer sleeve is sleeved with a horn sleeve, the inner inclined surface of the horn sleeve is evenly distributed with T-shaped guide grooves, the T-shaped guide grooves are respectively slidably provided with T-shaped sliders, and the T-shaped sliders are respectively installed correspondingly at one end of the rounded pin block located on the outer side of the outer sleeve, the outer side of the outer sleeve is sleeved with a No. 1 spring, and the No. 1 spring is located between the horn sleeve and the No. 1 hexagonal plate;

[0008] The connecting ends of the connector body are respectively equipped with connecting port assemblies, which include a No. 2 hexagonal plate and an internally threaded connecting terminal. A card slot is provided on the outer wall of the internally threaded connecting terminal corresponding to the evenly arranged rounded pin blocks, and the rounded end of the rounded pin block can be clamped in the card slot. The internal thread of the internally threaded connecting terminal can be connected to the external thread of the externally threaded connecting terminal, and is located between the externally threaded connecting terminal and the horn sleeve, so as to achieve the effect of connecting and fixing, prevent the connector from loosening due to vibration, and improve the firmness of the connection.

[0009] Preferably, the two groups of connecting components are located on the outside of two No. 1 hexagonal plates on which two externally threaded connecting terminals are installed, the connecting hose is located inside the outer protective tube, the outer sleeve is installed on the No. 1 hexagonal plate, the rounded end of the rounded pin block is located on the inside of the outer sleeve and facing the internally threaded connecting terminal, and the internally threaded connecting terminal is installed on the No. 2 hexagonal plate, and the cooperation achieves the effect of joint connection and installation, ensuring the normal use of the joint.

[0010] Preferably, the outer protective tube is evenly distributed with No. 1 through grooves, and translation blocks are respectively arranged in the No. 1 through grooves. Extrusion plates are respectively installed at one end of the translation blocks located in the outer protective tube, and the extrusion plates are arranged in an arc shape and can be assembled into a circular sleeve. The extrusion plates are located on the outside of the connecting hose, and the cable clamping and fixing effect is achieved, thereby improving the sealing effect of the joint.

[0011] Preferably, the connecting hose is composed of a rubber anti-corrosion inner tube, a fiber reinforcement layer and a rubber anti-corrosion outer tube, and the fiber reinforcement layer is located between the rubber anti-corrosion inner tube and the rubber anti-corrosion outer tube, which cooperate to ensure the sealing effect of the explosion-proof joint and improve safety of use.

[0012] Preferably, the locking assembly includes an annular plate No. 1, an annular plate No. 2, a limiting rib and a No. 2 spring, the annular plate No. 1 and the annular plate No. 2 are both sleeved on the outside of the outer protective tube, and the annular plate No. 1 and the annular plate No. 2 are parallel to each other, and an arc-shaped guide grooves are penetrated on the annular plate corresponding to the evenly distributed translation blocks, and limiting rods are respectively arranged in the arc-shaped guide grooves, and the limiting rods are respectively installed under one end of the translation block located outside the outer protective tube, and the cooperation achieves the effect of driving the translation block to contract inward or expand outward at the same time, so as to clamp the cable.

[0013] Preferably, rounded corner limit grooves are evenly distributed on the side of the No. 2 annular plate facing the No. 1 annular plate, and rounded corner limit blocks are evenly distributed on the side of the No. 1 annular plate facing the No. 2 annular plate, and the rounded corner limit blocks can be clamped in the rounded corner limit grooves, and the rounded corner edges of the rounded corner limit blocks correspond to the rounded corner edges of the rounded corner limit grooves, and the cooperation achieves the function of limiting the No. 1 annular plate, preventing the translation plate from expanding outward after the cable is clamped, thereby ensuring the clamping effect.

[0014] Preferably, the limiting rib is installed on the outer wall of the outer protective tube, and the No. 2 annular plate is provided with a rib groove for limiting, and the limiting rib is slidably arranged in the rib groove provided in the No. 2 annular plate, and the limiting rib is parallel to the center line of the outer protective tube, and a No. 2 spring is provided on the outside of the outer protective tube, and the No. 2 spring is located between the No. 2 annular plate and the No. 1 hexagonal plate on which one of the external threaded connection terminals is installed, and the cooperation achieves the effect of limiting, thereby preventing the No. 2 annular plate from shifting during use and affecting the cable clamping effect.

[0015] The utility model is beneficial in that:

[0016] 1. The utility model threadably connects the connector body with the internal thread connector through an external thread connector. After the speaker sleeve moves toward the No. 1 spring, it drives the rounded pin block to extend toward the outside of the outer sleeve through the T-shaped guide groove and the T-shaped slider on its inner bevel. When the external thread connector and the internal thread connector are connected in place, under the action of the No. 1 spring, the rounded pin block extends into the outer sleeve and is clamped in the clamping groove on the outer wall of the internal thread connector. The combination achieves the effect of connection and fixation, prevents the connector from loosening due to vibration, and improves the connection firmness.

[0017] 2. The utility model allows the cable to pass through two externally threaded connection terminals and the connecting hose at the same time, and then rotates the No. 2 annular plate clockwise. When the No. 1 annular plate rotates clockwise, it will cooperate with the limit rod through the arc guide groove provided thereon to drive the translation block to extend to the inside of the outer protective tube. The extrusion plate installed at one end of the translation block located in the outer protective tube will gather toward the middle at the same time, and the connection hose and the cable will be closed under the extrusion of the extrusion plate. The cooperation achieves the effect of improving the sealing effect of the explosion-proof joint and improving the firmness of the cable installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 is a schematic diagram of a first three-dimensional structure;

[0020] Figure 2 This is an enlarged schematic diagram of the main structure of the external thread connection terminal;

[0021] Figure 3 It is a cutaway and enlarged schematic diagram of the main structure of the connecting hose;

[0022] Figure 4 It is a cutaway and enlarged schematic diagram of the main structure of the connection component;

[0023] Figure 5 It is an enlarged schematic diagram of area A in the cutaway diagram of the main structure of the connection component;

[0024] Figure 6 It is an enlarged schematic diagram of the main structure of the connection port component;

[0025] Figure 7 It is a cutaway and enlarged schematic diagram of the main structure of the clamping assembly;

[0026] Figure 8 It is an enlarged schematic diagram of the main structure of the clamping assembly;

[0027] Fig. 9 This is an enlarged schematic diagram of the main structure of the No. 2 ring plate.

[0028] In the figure: 1. Connector body; 101. Externally threaded connection terminal; 2. Connecting hose; 201. Rubber anti-corrosion inner tube; 202. Fiber reinforcement layer; 203. Rubber anti-corrosion outer tube; 3. No. 1 hexagonal plate; 4. Outer protective tube; 5. No. 1 through groove; 6. Outer sleeve; 7. No. 2 through groove; 8. Horn sleeve; 9. Rounded corner pin block; 10. T-shaped guide groove; 11. T-shaped slider; 12. No. 1 spring; 13. Internally threaded connection terminal; 14. No. 2 hexagonal plate; 15. Slot; 16. No. 1 annular plate; 17. Arc guide groove; 18. Translation block; 19. Limit rod; 20. Extrusion plate; 21. No. 2 annular plate; 22. Limit ribs; 23. Rounded corner limit block; 24. Rounded corner limit groove; 25. No. 2 spring. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] See also Figure 1-6 As shown, a double-sealed explosion-proof joint for mining includes a joint body 1; the joint body 1 is composed of a connecting hose 2, an outer protective tube 4 and two externally threaded connecting terminals 101, and the two externally threaded connecting terminals 101 are respectively connected to both ends of the connecting hose 2, and a No. 1 hexagonal plate 3 is installed on the two externally threaded connecting terminals 101, and an outer protective tube 4 is installed between the two No. 1 hexagonal plates 3, and the center line of the outer protective tube 4 coincides with the center line of the externally threaded connecting terminal 101, and two groups of connecting components are mirror-imaged on the two externally threaded connecting terminals 101, and a locking component is arranged on the outer protective tube 4;

[0031] The connecting assembly includes an outer sleeve 6, the outer sleeve 6 coincides with the center line of the external threaded connection terminal 101, the side wall of the outer sleeve 6 is evenly distributed with No. 2 through grooves 7, and the No. 2 through grooves 7 are respectively penetrated with rounded pin blocks 9, the outer side of the outer sleeve 6 is sleeved with a horn sleeve 8, the inner inclined surface of the horn sleeve 8 is evenly distributed with T-shaped guide grooves 10, and T-shaped sliders 11 are respectively slidably arranged in the T-shaped guide grooves 10, and the T-shaped sliders 11 are respectively installed correspondingly at one end of the rounded pin block 9 located on the outside of the outer sleeve 6, the outer side of the outer sleeve 6 is sleeved with a No. 1 spring 12, and the No. 1 spring 12 is located between the horn sleeve 8 and the No. 1 hexagonal plate 3;

[0032] The connecting ends of the connector body 1 are respectively equipped with connection port assemblies, which include a No. 2 hexagonal plate 14 and an internally threaded connection terminal 13. A card slot 15 is provided on the outer wall of the internally threaded connection terminal 13 corresponding to the evenly opened rounded pin block 9, and the rounded end of the rounded pin block 9 can be clamped in the card slot 15. The internal thread of the internally threaded connection terminal 13 can be connected to the external thread of the externally threaded connection terminal 101, and is located between the externally threaded connection terminal 101 and the horn sleeve 8.

[0033] The two groups of connecting components are located on the outside of two No. 1 hexagonal plates 3 installed with two externally threaded connecting terminals 101, the connecting hose 2 is located in the outer protective tube 4, the outer sleeve 6 is installed on the No. 1 hexagonal plate 3, the rounded end of the rounded pin block 9 is located on the inside of the outer sleeve 6 and facing the internally threaded connecting terminal 13, and the internally threaded connecting terminal 13 is installed on the No. 2 hexagonal plate 14.

[0034] During operation, since the existing explosion-proof joints cannot fix the cables passing through, and vibrations are usually generated at coal mine construction sites, long-term vibrations can easily loosen the joints, thereby affecting the connection effect and resulting in poor connection protection effects. In this solution, in the initial state, the No. 1 springs 12 in the connecting components at both ends of the joint body 1 will always push the horn sleeve 8 to the two ends of the joint body 1, respectively, so that the T-shaped slider 11 installed at one end of the rounded corner pin block 9 outside the outer sleeve 6 is maintained at the end of the T-shaped guide groove 10 opened on the inner bevel of the horn sleeve 8, and is located at the end of the T-shaped guide groove 10 close to the No. 1 spring 12, and under the guiding action of the T-shaped guide groove 10 on the inner bevel of the horn sleeve 8, the round corner pin block 9 is The rounded end of the corner pin block 9 is extended and arranged on the inner side of the outer sleeve 6. During normal use, by setting the connection port assembly on the device or box to which the cable needs to be connected, after the cable is passed through the connector body 1, the cable is fixed in the connector body 1 by the locking assembly, and the connector body 1 is threadedly connected through the external thread of the external threaded connection terminal 101 at the cable connection end thereof and the internal thread of the internal threaded connection terminal 13 through its external thread. At this time, the rounded end of the corner pin block 9 in the connection assembly at the end of the connector body 1 will be squeezed toward the inner end of the opening of the No. 2 through groove 7 under the pressure of the internal threaded connection terminal 13, so that the corner pin block 9 extends to the outside of the outer sleeve 6, and the external threaded connection terminal 101 and the internal threaded connection terminal When the horn sleeve 8 is threadedly connected, the horn sleeve 8 is moved toward the side of the No. 1 spring 12, so that the horn sleeve 8 presses the No. 1 spring 12 toward the inner side of the No. 1 hexagonal plate 3. After the horn sleeve 8 moves toward the No. 1 spring 12, it will drive the rounded pin block 9 to extend toward the outside of the outer sleeve 6 through the T-shaped guide groove 10 and the T-shaped slider 11 on its inner bevel, and the T-shaped slider 11 will slide in the T-shaped guide groove 10. When the external thread connection terminal 101 and the internal thread connection terminal 13 are threadedly connected in place, the rounded pin block 9 located in the No. 2 through groove 7 will respectively correspond to the openings of the card slot 15, and then the horn sleeve 8 is released. At this time, under the action of the No. 1 spring 12, the horn sleeve 8 will be opposite to the No. 1 hexagonal plate 3. The horn sleeve 8 moves to the opposite side. At this time, the T-shaped guide groove 10 located on the inner inclined surface of the horn sleeve 8 will drive the rounded pin block 9 to extend into the outer sleeve 6 through the T-shaped slider 11, and the T-shaped slider 11 will slide in the T-shaped guide groove 10 toward the end away from the No. 1 spring 12. When the rounded pin block 9 extends into the outer sleeve 6, its rounded end will be stuck in the groove 15 opened on the outer wall of the internal threaded connection terminal 13, thereby connecting and fixing the connector body 1 to the connection port assembly. The cooperation between the rounded pin block 9 and the groove 15 prevents the external threaded connection terminal 101 from detaching from the internal threaded connection terminal 13, and the cooperation achieves the effect of connection and fixing, prevents the connector from loosening due to vibration, and improves the connection firmness.

[0035] See also Figure 1-9As shown, the outer protective tube 4 is evenly distributed with No. 1 through grooves 5, and the No. 1 through grooves 5 are respectively penetrated by translation blocks 18. One end of the translation blocks 18 located in the outer protective tube 4 is respectively installed with an extrusion plate 20, and the extrusion plate 20 is arranged in an arc shape and can be assembled into a circular sleeve. The extrusion plate 20 is located on the outside of the connecting hose 2.

[0036] The connecting hose 2 is composed of a rubber anti-corrosion inner tube 201 , a fiber reinforcement layer 202 and a rubber anti-corrosion outer tube 203 , wherein the fiber reinforcement layer 202 is located between the rubber anti-corrosion inner tube 201 and the rubber anti-corrosion outer tube 203 .

[0037] The locking assembly includes a No. 1 annular plate 16, a No. 2 annular plate 21, a limiting rib 22 and a No. 2 spring 25. The No. 1 annular plate 16 and the No. 2 annular plate 21 are both sleeved on the outside of the outer protective tube 4, and the No. 1 annular plate 16 and the No. 2 annular plate 21 are parallel to each other. The No. 1 annular plate 16 is provided with arc guide grooves 17 corresponding to the evenly distributed translation blocks 18, and limiting rods 19 are respectively arranged in the arc guide grooves 17. The limiting rods 19 are respectively installed under one end of the translation block 18 located outside the outer protective tube 4.

[0038] The side of the second annular plate 21 facing the first annular plate 16 is evenly distributed with rounded corner limit grooves 24, and the side of the first annular plate 16 facing the second annular plate 21 is evenly distributed with rounded corner limit blocks 23, and the rounded corner limit blocks 23 can be clamped in the rounded corner limit grooves 24, and the rounded corner edges of the rounded corner limit blocks 23 correspond to the rounded corner edges of the rounded corner limit grooves 24.

[0039] The limiting rib 22 is installed on the outer wall of the outer protective tube 4, and a rib groove for limiting is opened through the No. 2 annular plate 21, and the limiting rib 22 is slidably set in the rib groove opened in the No. 2 annular plate 21. The limiting rib 22 is parallel to the center line of the outer protective tube 4. A No. 2 spring 25 is sleeved on the outside of the outer protective tube 4, and the No. 2 spring 25 is located between the No. 2 annular plate 21 and the No. 1 hexagonal plate 3 installed with one of the external threaded connection terminals 101.

[0040] During operation, in order to improve the sealing effect of the explosion-proof joint in this scheme, the cables passing through can be clamped and fixed to prevent the cables from falling from the joint. In this scheme, in the initial state, the No. 2 spring 25 will always push the No. 2 annular plate 21 upward, so that the No. 2 annular plate 21 is attached to the bottom of the No. 1 annular plate 16, and then the rounded corner limit block 23 under the No. 1 annular plate 16 is embedded in the rounded corner limit groove 24, and then the cable is passed through the joint body 1, so that the cable is simultaneously passed through the two externally threaded connection terminals 101 and the connecting hose 2, and then the No. 2 annular plate 21 is rotated clockwise, The rounded edge of the rounded corner limit block 23 fits with the rounded edge of the rounded corner limit groove 24. When rotating clockwise, the rounded edge of the rounded corner limit block 23 will gradually push the rounded edge of the rounded corner limit groove 24 downward. After the rounded edge of the rounded corner limit groove 24 is squeezed, the second annular plate 21 will move downward, and the rounded corner limit block 23 will be embedded in the rounded corner limit groove 24 in turn. When the first annular plate 16 rotates clockwise, it will cooperate with the arc guide groove 17 and the limit rod 19 provided thereon to drive the translation block 18 to extend toward the inner side of the outer protective tube 4, and the translation block 18 evenly distributed in the first through groove 5 When extending inward at the same time, the extrusion plate 20 installed at one end of the translation block 18 located in the outer protective tube 4 will gather toward the middle at the same time, and will squeeze the connecting hose 2 inward at the same time to make it fit on the cable. Under the extrusion of the extrusion plate 20, the connecting hose 2 and the cable are sealed, thereby improving the sealing effect of the explosion-proof joint. When disassembling, the second annular plate 21 is pushed in the opposite direction of the first annular plate 16 to separate the second annular plate 21 from the first annular plate 16. At this time, the rounded corner limit block 23 will be separated from the rounded corner limit groove 24, and the second annular plate 21 will pass through the rib groove opened thereon when it is pushed. It cooperates with the limiting rib 22 to slide on the outside of the outer protective tube 4. At this time, the No. 1 annular plate 16 will lose its restriction. The No. 1 annular plate 16 is rotated counterclockwise so that the No. 1 annular plate 16 cooperates with the limiting rod 19 through the arc guide groove 17 opened thereon to drive the translation block 18 to extend to the outside of the outer protective tube 4, thereby expanding the extrusion plate 20 at one end of the translation block 18 located in the outer protective tube 4, so that the extrusion plate 20 returns to its original position. At this time, the connecting hose 2 will lose its extrusion, and the cable can be taken out of the connector body 1. The cooperation achieves the effect of improving the sealing effect of the explosion-proof connector and improving the firmness of the cable installation.

[0041] Working principle: in the initial state, the No. 1 spring 12 in the connecting assembly at both ends of the connector body 1 will always push the speaker sleeve 8 to the two ends of the connector body 1 respectively, so that the T-shaped slider 11 installed at one end of the rounded corner pin block 9 outside the outer sleeve 6 is maintained at the end of the T-shaped guide groove 10 opened on the inner bevel of the speaker sleeve 8, and is located at the end of the T-shaped guide groove 10 close to the No. 1 spring 12, and under the guiding action of the T-shaped guide groove 10 on the inner bevel of the speaker sleeve 8, the rounded end of the rounded corner pin block 9 is extended and set on the inner side of the outer sleeve 6. In normal use, the cable is connected by setting the connection port assembly on the device or box to be connected to the cable. After passing through the connector body 1, the cable is fixed in the connector body 1 by the locking assembly, and then the connector body 1 is threadedly connected with the internal thread of the internal thread terminal 13 through its external thread through the external thread of the external thread connection terminal 101 at the cable connection end. At this time, the rounded end of the rounded corner pin block 9 in the connecting assembly at the end of the connector body 1 will be squeezed to the inner end of the opening of the No. 2 through groove 7 under the pressure of the internal thread connection terminal 13, so that the rounded corner pin block 9 extends to the outside of the outer sleeve 6, and when the external thread connection terminal 101 is threadedly connected with the internal thread connection terminal 13, the horn sleeve 8 is pushed toward the side of the No. 1 spring 12 to make the horn sleeve 8 move toward the No. 1 and No. 6 springs. The inner side of one side of the angle plate 3 squeezes the No. 1 spring 12. After the speaker sleeve 8 moves toward the No. 1 spring 12, it will drive the rounded pin block 9 to extend to the outside of the outer sleeve 6 through the T-shaped guide groove 10 and the T-shaped slider 11 on its inner inclined surface, and the T-shaped slider 11 will slide in the T-shaped guide groove 10. When the external thread connection terminal 101 and the internal thread connection terminal 13 are threaded into place, the rounded pin block 9 located in the No. 2 through groove 7 will respectively correspond to the opening of the card slot 15, and then the speaker sleeve 8 is released. At this time, under the action of the No. 1 spring 12, the speaker sleeve 8 will move to the side opposite to the No. 1 hexagonal plate 3. At this time, the inner inclined surface of the speaker sleeve 8 The T-shaped guide groove 10 will drive the rounded pin block 9 to extend into the outer sleeve 6 through the T-shaped slider 11, and the T-shaped slider 11 will slide in the T-shaped guide groove 10 toward the end away from the No. 1 spring 12. When the rounded pin block 9 extends into the outer sleeve 6, its rounded end will be clamped in the clamping groove 15 opened on the outer wall of the internal threaded connection terminal 13, thereby connecting and fixing the connector body 1 and the connection port assembly. The cooperation between the rounded pin block 9 and the clamping groove 15 prevents the external threaded connection terminal 101 from detaching from the internal threaded connection terminal 13, and the cooperation achieves the effect of connection and fixing, prevents the connector from loosening due to vibration, and improves the connection firmness.

[0042] In the initial state, the second spring 25 will always push the second annular plate 21 upward, so that the second annular plate 21 fits under the first annular plate 16, and then the rounded corner limit block 23 under the first annular plate 16 is embedded in the rounded corner limit groove 24, and then the cable is passed through the connector body 1, so that the cable is simultaneously passed through the two external threaded connection terminals 101 and the connecting hose 2, and then the second annular plate 21 is rotated clockwise. Since the rounded corner edge of the rounded corner limit block 23 fits with the rounded corner edge of the rounded corner limit groove 24, the rounded corner limit block 23 is rotated clockwise. The rounded edge of the rounded corner of the rounded corner limiting groove 24 will gradually push the rounded edge of the rounded corner limiting groove 24 downward. After the rounded edge of the rounded corner limiting groove 24 is squeezed, the second annular plate 21 will move downward, and the rounded corner limiting block 23 will be inserted into the rounded corner limiting groove 24 in sequence. When the first annular plate 16 rotates clockwise, it will cooperate with the arc guide groove 17 and the limiting rod 19 provided thereon to drive the translation block 18 to extend toward the inner side of the outer protective tube 4. When the translation blocks 18 evenly distributed in the first through groove 5 extend inward at the same time, the translation block 18 is installed at one end inside the outer protective tube 4. The extrusion plate 20 will gather toward the middle at the same time, and will squeeze the connecting hose 2 inward to make it fit on the cable at the same time. Under the extrusion of the extrusion plate 20, the connecting hose 2 and the cable are sealed, thereby improving the sealing effect of the explosion-proof joint. When disassembling, the second annular plate 21 is pushed in the opposite direction of the first annular plate 16 to separate the second annular plate 21 from the first annular plate 16. At this time, the rounded limit block 23 will be separated from the rounded limit groove 24, and when the second annular plate 21 is pushed, it will cooperate with the limit rib 22 on the outer protective tube through the rib groove opened thereon. 4, at this time, the No. 1 annular plate 16 will lose its restriction, and the No. 1 annular plate 16 will be rotated counterclockwise, so that the No. 1 annular plate 16 can cooperate with the limit rod 19 to drive the translation block 18 to extend to the outside of the outer protective tube 4 through the arc-shaped guide groove 17 provided thereon, thereby expanding the extrusion plate 20 at one end of the translation block 18 located in the outer protective tube 4, so that the extrusion plate 20 returns to its original position, and the connecting hose 2 will lose its extrusion, so that the cable can be taken out of the connector body 1, so as to achieve the effect of improving the sealing effect of the explosion-proof connector and improving the firmness of the cable installation.

[0043] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A double-seal explosion-proof joint for mining, characterized by: The invention comprises a joint body (1); the joint body (1) is composed of a connecting hose (2), an outer protective tube (4) and two externally threaded connecting terminals (101), and the two externally threaded connecting terminals (101) are respectively connected to the two ends of the connecting hose (2), a No. 1 hexagonal plate (3) is installed on each of the two externally threaded connecting terminals (101), an outer protective tube (4) is installed between the two No. 1 hexagonal plates (3), the center line of the outer protective tube (4) coincides with the center line of the externally threaded connecting terminal (101), two groups of connecting components are mirror-imaged on the two externally threaded connecting terminals (101), and a locking component is arranged on the outer protective tube (4); The connection assembly comprises an outer sleeve (6), wherein the outer sleeve (6) coincides with the center line of the external thread connection terminal (101), the side wall of the outer sleeve (6) is evenly distributed with second through grooves (7), and rounded pin blocks (9) are respectively arranged in the second through grooves (7), a horn sleeve (8) is sleeved on the outer side of the outer sleeve (6), and the inner inclined surface of the horn sleeve (8) is evenly distributed with T-shaped guide grooves (10), and T-shaped sliders (11) are respectively slidably arranged in the T-shaped guide grooves (10), and the T-shaped sliders (11) are respectively installed correspondingly at one end of the rounded pin block (9) located on the outer side of the outer sleeve (6), and a first spring (12) is sleeved on the outer side of the outer sleeve (6), and the first spring (12) is located between the horn sleeve (8) and the first hexagonal plate (3); The connection ends of the connector body (1) are respectively equipped with connection port assemblies, and the connection port assemblies include a No. 2 hexagonal plate (14) and an internally threaded connection terminal (13). A clamping groove (15) is provided on the outer wall of the internally threaded connection terminal (13) corresponding to the evenly arranged rounded corner pin blocks (9), and the rounded corner end of the rounded corner pin block (9) can be clamped in the clamping groove (15). The internal thread of the internally threaded connection terminal (13) can be connected to the external thread of the externally threaded connection terminal (101), and is located between the externally threaded connection terminal (101) and the horn sleeve (8).

2. A double-seal explosion-proof joint for mining according to claim 1, characterized in that: The two groups of connection components are located outside two No. 1 hexagonal plates (3) on which two externally threaded connection terminals (101) are installed, the connection hose (2) is located inside the outer protective tube (4), the outer sleeve (6) is installed on the No. 1 hexagonal plate (3), the rounded end of the rounded pin block (9) is located inside the outer sleeve (6) and directly faces the internally threaded connection terminal (13), and the internally threaded connection terminal (13) is installed on the No. 2 hexagonal plate (14).

3. The double-seal explosion-proof joint for mining according to claim 1 is characterized in that: The outer protective tube (4) is evenly distributed with number one through grooves (5), and the number one through grooves (5) are respectively provided with translation blocks (18). One end of the translation blocks (18) located in the outer protective tube (4) is respectively provided with an extrusion plate (20), and the extrusion plate (20) is arranged in an arc shape and can be assembled into a circular sleeve. The extrusion plate (20) is located outside the connecting hose (2).

4. The double-seal explosion-proof joint for mining according to claim 1 is characterized in that: The connecting hose (2) is composed of a rubber anti-corrosion inner tube (201), a fiber reinforcement layer (202) and a rubber anti-corrosion outer tube (203), wherein the fiber reinforcement layer (202) is located between the rubber anti-corrosion inner tube (201) and the rubber anti-corrosion outer tube (203).

5. The double-seal explosion-proof joint for mining according to claim 1, characterized in that: The locking assembly comprises a first annular plate (16), a second annular plate (21), a limiting rib (22) and a second spring (25); the first annular plate (16) and the second annular plate (21) are both sleeved on the outside of the outer protective tube (4), and the first annular plate (16) and the second annular plate (21) are parallel to each other; the first annular plate (16) is provided with arc-shaped guide grooves (17) corresponding to the translation blocks (18) evenly distributed, and limiting rods (19) are respectively arranged in the arc-shaped guide grooves (17); the limiting rods (19) are respectively installed under one end of the translation block (18) located outside the outer protective tube (4).

6. A double-seal explosion-proof joint for mining according to claim 5, characterized in that: The second annular plate (21) is provided with rounded corner limit grooves (24) evenly distributed on one side facing the first annular plate (16), and the first annular plate (16) is provided with rounded corner limit blocks (23) evenly distributed on one side facing the second annular plate (21), and the rounded corner limit blocks (23) can be clamped in the rounded corner limit grooves (24), and the rounded corner edges of the rounded corner limit blocks (23) correspond to the rounded corner edges of the rounded corner limit grooves (24).

7. The double-seal explosion-proof joint for mining according to claim 5, characterized in that: The limiting rib (22) is installed on the outer wall of the outer protective tube (4); a rib groove for limiting is provided through the second annular plate (21); and the limiting rib (22) is slidably arranged in the rib groove provided in the second annular plate (21); the limiting rib (22) and the center line of the outer protective tube (4) are parallel to each other; a second spring (25) is sleeved on the outer side of the outer protective tube (4); and the second spring (25) is located between the second annular plate (21) and the first hexagonal plate (3) on which one of the external threaded connection terminals (101) is installed.

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