Joint assembly for explosion-proof flexible pipe

Abstract

The utility model provides a joint assembly for an anti-explosion flexible pipe, which is arranged between the anti-explosion flexible pipe and a cooling jacket, and the cooling jacket is provided with an end head protruding outwards. The connector comprises a body and a connecting sleeve. The main body is of a hollow structure with two open ends, one end of the main body is used for being inserted into the explosion-proof flexible pipe, and the other end of the main body is used for abutting against the end; the connecting sleeve slidably sleeves the main body along the axial direction of the main body and is used for sleeving the end head; wherein an anti-falling structure is arranged between the connecting sleeve and the main body; and when the main body is inserted into the explosion-proof flexible pipe and the connecting sleeve is sleeved on the end head, the connecting sleeve is connected with the main body through the anti-falling structure so as to limit the relative movement of the main body and the connecting sleeve. According to the connector assembly for the anti-explosion flexible pipe, induced electricity on the electrode cooling sleeve can be prevented from being transmitted to the circulating oil tank through a steel wire on the anti-explosion flexible pipe, and normal use of the circulating oil tank is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of insulating pipe joints, and more specifically relates to an explosion-proof flexible pipe joint assembly. Background Art

[0002] In order to avoid electrode oxidation, a cooling system is usually provided for the easily oxidized parts. A common cooling system includes a cooling jacket connected to the easily oxidized area, and a circulating oil tank connected to the cooling jacket through an explosion-proof flexible pipe. When the circulating oil tank is started, the cooling oil passes through the cooling jacket through the explosion-proof flexible pipe and exchanges heat with the electrode, thereby achieving the technical purpose of reducing the surface temperature of the electrode.

[0003] In the prior art, in order to ensure a stable connection between the explosion-proof flexible pipe and related components, the end of the explosion-proof flexible pipe is usually connected to a cooling jacket or a circulating oil tank by means of a joint.

[0004] The inventors found that when connecting the explosion-proof flexible tube and the cooling jacket, the joint is likely to scratch the surface of the explosion-proof flexible tube, thereby exposing the steel wire inside the rubber layer, reducing the insulation of the explosion-proof flexible tube; and because the cooling jacket is close to the electrode, induced electricity is easily generated on the cooling jacket, and this induced electricity will also be transmitted along the steel wire to the circulating oil tank, thereby affecting the normal use of the circulating oil tank. Utility Model Content

[0005] The purpose of the present application is to provide a joint assembly for explosion-proof flexible pipes to solve the technical problem in the prior art that the joints easily scratch the surface of the explosion-proof flexible pipes, thereby reducing the insulation performance of the explosion-proof flexible pipes.

[0006] To achieve the above-mentioned purpose, the technical solution adopted in the present application is: to provide an explosion-proof flexible pipe joint assembly, which is used to be arranged between the explosion-proof flexible pipe and the cooling jacket, and the cooling jacket has an end protruding outward; characterized in that it includes:

[0007] The main body is hollow inside and open at both ends, one end of which is used to be inserted into the explosion-proof flexible tube, and the other end of which is used to abut against the end head; and

[0008] A connecting sleeve is slidably sleeved on the main body along the axial direction of the main body and is used to be sleeved on the end head;

[0009] Wherein, there is an anti-slip structure between the connecting sleeve and the main body; when the main body is inserted into the explosion-proof flexible tube and the connecting sleeve is placed on the end head, the connecting sleeve is connected to the main body through the anti-slip structure to limit the relative movement of the main body and the connecting sleeve.

[0010] Preferably, the anti-slip structure comprises:

[0011] A ring platform is provided at one end of the main body connected to the end head, and extends radially outwardly from the main body; and

[0012] The first convex ring is arranged on the connecting sleeve, extends radially inwardly of the connecting sleeve, and is used for abutting against a side of the ring platform facing away from the end head.

[0013] Preferably, the connecting sleeve further comprises a first insulating ring; the first insulating ring is sleeved on the main body, and the first insulating ring is located between the first convex ring and the ring platform;

[0014] Wherein, when the main body is in contact with the end head and the connecting sleeve is placed on the end head, the two ends of the first insulating ring are suitable for respectively contacting with the first convex ring and the ring platform.

[0015] Preferably, the joint assembly further comprises:

[0016] A protective cushion layer, disposed between the main body insertion end and the explosion-proof flexible tube;

[0017] A fixing sleeve, which is placed outside the explosion-proof flexible tube and has a second convex ring extending radially inward inside the fixing sleeve; the second convex ring is used to abut against a side of the explosion-proof flexible tube facing the end head; and

[0018] The sealing gasket is located between the main body and the end head, and two ends of the sealing gasket are respectively in contact with the main body and the end head to seal the gap between the main body and the end head.

[0019] Preferably, the insertion portion of the main body has a plurality of annular grooves arranged along the axial direction; the cross-sectional diameter of each annular groove is slightly larger than the inner diameter of the explosion-proof flexible tube;

[0020] Wherein, when the main body is inserted into the interior of the explosion-proof flexible tube, the outer peripheral wall of each annular groove is suitable for abutting against the protective cushion layer.

[0021] Preferably, the diameter of each of the annular grooves gradually decreases in a direction away from the end head.

[0022] Preferably, the inner wall of the fixing sleeve has a plurality of annular protrusions arranged along the axis direction of the fixing sleeve; the cross-sectional diameter of each annular protrusion is slightly smaller than the outer diameter of the explosion-proof flexible tube;

[0023] Wherein, when the main body is inserted into the interior of the explosion-proof flexible tube and the fixing sleeve is placed outside the explosion-proof flexible tube, each of the annular protrusions is suitable for abutting against the outer wall of the explosion-proof flexible tube.

[0024] Preferably, the diameter of each of the annular protrusions gradually decreases in a direction away from the end head.

[0025] Preferably, the fixing sleeve further comprises a second insulating ring; the second insulating ring is sleeved on the main body, and the second insulating ring is located between the second convex ring and the explosion-proof flexible tube;

[0026] Wherein, when the main body is inserted into the explosion-proof flexible tube and the fixing sleeve is placed outside the explosion-proof flexible tube, the two ends of the second insulating ring are suitable for respectively abutting against the second convex ring and the explosion-proof flexible tube.

[0027] Preferably, the main body has an inclined platform at one end facing away from the end head, and the cross-sectional diameter of the inclined platform gradually decreases in the direction facing away from the end head;

[0028] Wherein, when the main body is inserted into the interior of the explosion-proof flexible tube, the inclined platform is suitable for abutting against the inner wall of the explosion-proof flexible tube.

[0029] In the embodiment of the present application, by arranging the joint assembly between the explosion-proof flexible tube and the cooling jacket, it is possible to avoid the cooling jacket with induced electricity being directly connected to the explosion-proof flexible tube, thereby effectively avoiding the induced electricity being transmitted to the circulating oil tank through the steel wire on the explosion-proof flexible tube due to scratches or aging of the explosion-proof flexible tube; at the same time, the joint assembly also simplifies the installation process of the explosion-proof flexible tube, saving time and effort.

[0030] Compared with the prior art, the explosion-proof flexible pipe joint assembly provided in the embodiment of the present application can prevent the induced electricity on the electrode cooling sleeve from being transmitted to the circulating oil tank through the steel wire on the explosion-proof flexible pipe, thereby ensuring the normal use of the circulating oil tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application, 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 present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0032] Figure 1 A schematic cross-sectional structure diagram of an explosion-proof flexible pipe joint assembly provided in an embodiment of the present application;

[0033] Figure 2 This is a schematic diagram of the cross-sectional structure of the main body proposed in the embodiment of the present application;

[0034] Figure 3 This is a schematic cross-sectional structure diagram of the fixing sleeve proposed in the embodiment of the present application;

[0035] Among them, the reference numerals in the figure are:

[0036] 1. Main body; 11. Ring platform; 12. Ring groove; 13. Inclined platform; 2. Connecting sleeve; 21. First insulating ring; 3. Fixing sleeve; 31. Ring protrusion; 32. Second insulating ring; 4. Protective cushion layer; 5. Sealing gasket; 6. Explosion-proof flexible tube; 7. End. DETAILED DESCRIPTION

[0037] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0038] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0039] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0040] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0041] Please also read Figures 1 to 3 The explosion-proof flexible pipe joint assembly provided by the present application is now described. The explosion-proof flexible pipe joint assembly is used to be arranged between an explosion-proof flexible pipe 6 and a cooling jacket, and the cooling jacket has an end 7 protruding outward; the explosion-proof flexible pipe joint assembly includes a main body 1 and a connecting sleeve 2.

[0042] The main body 1 is made of high temperature resistant and corrosion resistant materials to improve the service life of the joint assembly; the main body 1 adopts a structure with a hollow interior and open ends; one end of the main body 1 is used to be inserted into the explosion-proof flexible tube 6, the hollow cavity inside the main body 1 is used to communicate with the interior of the explosion-proof flexible tube 6, and the other end of the main body 1 is used to abut against the end head 7.

[0043] The connecting sleeve 2 is slidably sleeved on the main body 1 along the axial direction of the main body 1, and the connecting sleeve 2 is used to be sleeved on the end head 7; the interior of the connecting sleeve 2 can be processed with an internal thread structure, and the connecting sleeve 2 can be threadedly connected with the end head 7 through the internal thread structure.

[0044] Among them, there is an anti-slip structure between the connecting sleeve 2 and the main body 1; when the main body 1 is inserted into the explosion-proof flexible tube 6 and the connecting sleeve 2 is placed on the end 7, the connecting sleeve 2 is connected to the main body 1 through the anti-slip structure to limit the relative movement of the main body 1 and the connecting sleeve 2.

[0045] In the embodiment of the present application, by arranging the joint assembly between the explosion-proof flexible tube 6 and the cooling jacket, it is possible to avoid the cooling jacket with induced electricity being directly connected to the explosion-proof flexible tube 6, thereby effectively avoiding the induced electricity being transmitted to the circulating oil tank through the steel wire on the explosion-proof flexible tube 6 due to scratches or aging of the explosion-proof flexible tube 6; at the same time, the joint assembly also simplifies the installation process of the explosion-proof flexible tube 6, saving time and effort.

[0046] Compared with the prior art, the explosion-proof flexible pipe joint assembly provided in the embodiment of the present application can prevent the induced electricity on the electrode cooling sleeve from being transmitted to the circulating oil tank through the steel wire on the explosion-proof flexible pipe 6, thereby ensuring the normal use of the circulating oil tank.

[0047] In some embodiments, please refer to Figures 1 to 3 As a specific implementation of the explosion-proof flexible pipe joint assembly provided in the present application, the anti-slip structure includes a ring platform 11 and a first convex ring.

[0048] The annular platform 11 is disposed at one end of the main body 1 connected to the end head 7 , and the annular platform 11 extends outwardly along the radial direction of the main body 1 ; wherein the outer diameter of the annular platform 11 is the same as the outer diameter of the end head 7 .

[0049] The first convex ring is arranged on the connecting sleeve 2 and extends radially inwardly of the connecting sleeve 2 , wherein the inner diameter of the first convex ring is larger than the outer diameter of the main body 1 and smaller than the outer diameter of the ring stage 11 ; the first convex ring is used to abut against the side of the ring stage 11 facing away from the end head 7 .

[0050] By adopting the above technical solution, when the connecting sleeve 2 is separated from the end head 7, the first convex ring abuts against the side of the ring platform 11 facing away from the end head 7, which can prevent the connecting sleeve 2 from being separated from the main body 1, and facilitates subsequent re-installation.

[0051] In some embodiments, please refer to Figures 1 to 3 As a specific embodiment of the explosion-proof flexible pipe joint assembly provided in the present application, the connecting sleeve 2 also has a first insulating ring 21; the first insulating ring 21 is sleeved on the main body 1, and the first insulating ring 21 is located between the first convex ring and the ring platform 11.

[0052] Among them, when the main body 1 is in contact with the end head 7 and the connecting sleeve 2 is placed on the end head 7, the two ends of the first insulating ring 21 are suitable for respectively contacting with the first convex ring and the ring platform 11; the two side surfaces of the first insulating ring 21 facing or facing away from the end head 7 have a protrusion extending along the axial direction of the end head 7, and the protrusion is located between the main body 1 and the connecting sleeve 2, and the protrusion is used to fill the gap between the main body 1 and the connecting sleeve 2.

[0053] The first insulating ring 21 can be made of high-density polytetrafluoroethylene material. High-density polytetrafluoroethylene material is an excellent sealing material with many unique advantages, such as excellent chemical corrosion resistance, excellent high temperature resistance, low friction coefficient, excellent insulation performance, etc.

[0054] By adopting the above technical solution, the connection sleeve 2 and the main body 1 can be connected non-contactly, thereby achieving the purpose of insulating connection between the connection sleeve 2 and the main body 1.

[0055] In some embodiments, see Figures 1 to 3 As a specific implementation of the explosion-proof flexible pipe joint assembly provided in the present application, the joint assembly also includes a protective cushion layer 4, a fixing sleeve 3 and a sealing gasket 5.

[0056] The protective cushion layer 4 is arranged between the insertion end of the main body 1 and the explosion-proof flexible tube 6 to prevent the main body 1 from scratching the inner wall of the explosion-proof flexible tube 6 during the insertion of the explosion-proof flexible tube 6, to avoid the steel wire in the explosion-proof flexible tube 6 being exposed after scratching, and to reduce the insulation of the explosion-proof flexible tube 6.

[0057] The fixing sleeve 3 is placed on the outside of the explosion-proof flexible tube 6 to prevent the explosion-proof flexible tube 6 from detaching from the main body 1; and the fixing sleeve 3 has a second convex ring extending radially inward; the second convex ring is used to abut the side of the explosion-proof flexible tube 6 facing the end 7; wherein, when the second convex ring abuts against the explosion-proof flexible tube 6, it indicates that the fixing sleeve 3 has reached the predetermined installation position. After the fixing sleeve 3 is installed, it can be reduced in diameter by hydraulic equipment to increase the pressure of the fixing sleeve 3 on the explosion-proof flexible tube 6 to provide a stronger fixing effect.

[0058] The sealing gasket 5 is located between the main body 1 and the end head 7, and its two ends are respectively in contact with the main body 1 and the end head 7 to seal the gap between the main body 1 and the end head 7; the sealing ring can be made of high-density polytetrafluoroethylene or silicone rubber to achieve a better sealing effect; wherein, when the two ends of the sealing gasket 5 are respectively in contact with the main body 1 and the end head 7, an insulating connection between the main body 1 and the end head 7 is also achieved, which can prevent the induced electricity on the water cooling jacket from being transmitted to the main body 1 through the end head 7.

[0059] In some embodiments, please refer to Figures 1 to 3 As a specific embodiment of the explosion-proof flexible pipe joint assembly provided in the present application, the insertion portion of the main body 1 has a plurality of annular grooves 12 arranged along the axial direction; the cross-sectional diameter of each annular groove 12 is slightly larger than the inner diameter of the explosion-proof flexible pipe 6.

[0060] When the main body 1 is inserted into the explosion-proof flexible tube 6 , the outer peripheral wall of each annular groove 12 is suitable for abutting against the protective cushion layer 4 .

[0061] By adopting the above technical solution, the highest points on both sides of each annular groove 12 form an annular sealing structure with the inner wall of the explosion-proof flexible tube 6, and multiple annular grooves 12 and the explosion-proof flexible tube 6 together form multiple annular sealing structures, which effectively improves the air tightness between the main body 1 and the explosion-proof flexible tube 6 and prevents the occurrence of leakage problems.

[0062] In some embodiments, please refer to Figures 1 to 3 As a specific implementation of the explosion-proof flexible pipe joint assembly provided by the present application, the diameter of each annular groove 12 gradually decreases in the direction away from the end head 7.

[0063] By adopting the above technical solution, during the process of inserting the main body 1 into the explosion-proof flexible tube 6, the small-diameter end of each annular groove 12 first abuts against the inner wall of the explosion-proof flexible tube 6, so that the inner diameter of the explosion-proof flexible tube 6 gradually expands, thereby reducing the friction between the explosion-proof flexible tube 6 and the main body 1 during installation, making the installation process of the main body 1 time-saving and labor-saving.

[0064] In some embodiments, please refer to Figures 1 to 3 As a specific embodiment of the explosion-proof flexible pipe joint assembly provided in the present application, the inner wall of the fixing sleeve 3 has a plurality of annular protrusions 31 arranged along the axial direction of the fixing sleeve 3; the cross-sectional diameter of each annular protrusion 31 is slightly smaller than the outer diameter of the explosion-proof flexible pipe 6.

[0065] When the main body 1 is inserted into the explosion-proof flexible tube 6 and the fixing sleeve 3 is placed on the outside of the explosion-proof flexible tube 6 , each annular protrusion 31 is suitable for abutting against the outer wall of the explosion-proof flexible tube 6 .

[0066] By adopting the above technical solution, when the fixing sleeve 3 is placed on the explosion-proof flexible tube 6, the highest point of each annular protrusion 31 is pressed on the outer wall of the explosion-proof flexible tube 6, causing the outer wall of the explosion-proof flexible tube 6 to undergo a certain concave deformation, thereby increasing the friction between the fixing sleeve 3 and the explosion-proof flexible tube 6.

[0067] In some embodiments, please refer to Figures 1 to 3 As a specific embodiment of the explosion-proof flexible pipe joint assembly provided by the present application, the cross-sectional diameter of each annular protrusion 31 gradually decreases in the direction away from the end head 7.

[0068] By adopting the above technical solution, during the process of the fixing sleeve 3 being placed on the explosion-proof flexible tube 6, the small-diameter end of each annular protrusion 31 first abuts against the outer wall of the explosion-proof flexible tube 6, so that the installation of the fixing sleeve 3 is time-saving and labor-saving; when the fixing sleeve 3 is subjected to the force of detaching from the explosion-proof flexible tube 6, the large-diameter ends of the multiple annular protrusions 31 will increase the friction between the fixing sleeve 3 and the explosion-proof flexible tube 6, ensuring that under normal use conditions, the fixing sleeve 3 and the explosion-proof flexible tube 6 are not prone to relative movement.

[0069] In some embodiments, please refer to Figures 1 to 3 As a specific embodiment of the explosion-proof flexible pipe joint assembly provided in the present application, the fixing sleeve 3 further includes a second insulating ring 32; the second insulating ring 32 is sleeved on the main body 1, and the second insulating ring 32 is located between the second convex ring and the explosion-proof flexible pipe 6;

[0070] When the main body 1 is inserted into the explosion-proof flexible tube 6 and the fixing sleeve 3 is placed outside the explosion-proof flexible tube 6 , the two ends of the second insulating ring 32 are suitable for abutting against the second convex ring and the explosion-proof flexible tube 6 respectively.

[0071] The second insulating ring 32 can be made of high-density polytetrafluoroethylene material. High-density polytetrafluoroethylene material is an excellent sealing material with many unique advantages, such as excellent chemical corrosion resistance, excellent high temperature resistance, low friction coefficient, excellent insulation performance, etc.

[0072] By adopting the above technical solution, the fixing sleeve 3 and the main body 1 can be connected non-contactly, thereby achieving the purpose of insulating connection between the fixing sleeve 3 and the main body 1.

[0073] In some embodiments, please refer to Figures 1 to 3 As a specific embodiment of the explosion-proof flexible pipe joint assembly provided by the present application, the end of the main body 1 facing away from the end head 7 has a ramp 13, and the cross-sectional diameter of the ramp 13 gradually decreases along the direction facing away from the end head 7;

[0074] When the main body 1 is inserted into the explosion-proof flexible tube 6 , the inclined platform 13 is suitable for contacting with the inner wall of the explosion-proof flexible tube 6 .

[0075] By adopting the above technical solution, during the process of inserting the main body 1 into the explosion-proof flexible tube 6, the small-diameter end of the ramp 13 first abuts against the inner wall of the explosion-proof flexible tube 6, so that the inner diameter of the explosion-proof flexible tube 6 gradually expands, thereby reducing the friction between the explosion-proof flexible tube 6 and the main body 1 during the installation of the main body 1, making the installation process of the main body 1 more time-saving and labor-saving.

[0076] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An explosion-proof flexible pipe joint assembly, which is used to be arranged between the explosion-proof flexible pipe and a cooling jacket, and the cooling jacket has an end protruding outward; characterized in that: include: The main body is hollow inside and open at both ends, one end of which is used to be inserted into the explosion-proof flexible tube, and the other end of which is used to abut against the end head; as well as A connecting sleeve is slidably sleeved on the main body along the axial direction of the main body and is used to be sleeved on the end head; Wherein, there is an anti-slip structure between the connecting sleeve and the main body; when the main body is inserted into the explosion-proof flexible tube and the connecting sleeve is placed on the end head, the connecting sleeve is connected to the main body through the anti-slip structure to limit the relative movement of the main body and the connecting sleeve.

2. The explosion-proof flexible pipe joint assembly according to claim 1, characterized in that: The anti-slip structure comprises: A ring platform is provided at one end of the main body connected to the end head, and extends radially outwardly from the main body; and The first convex ring is arranged on the connecting sleeve, extends radially inwardly of the connecting sleeve, and is used for abutting against a side of the ring platform facing away from the end head.

3. The explosion-proof flexible pipe joint assembly according to claim 2, characterized in that: The connecting sleeve also has a first insulating ring; the first insulating ring is sleeved on the main body, and the first insulating ring is located between the first convex ring and the ring platform; Wherein, when the main body is in contact with the end head and the connecting sleeve is placed on the end head, the two ends of the first insulating ring are suitable for respectively contacting with the first convex ring and the ring platform.

4. The explosion-proof flexible pipe joint assembly according to claim 1, characterized in that: The joint assembly also includes: A protective cushion layer, disposed between the main body insertion end and the explosion-proof flexible tube; a fixing sleeve, which is placed outside the explosion-proof flexible tube and has a second convex ring extending radially inward inside the fixing sleeve; the second convex ring is used to abut against a side of the explosion-proof flexible tube facing the end head; and The sealing gasket is located between the main body and the end head, and two ends of the sealing gasket are respectively in contact with the main body and the end head to seal the gap between the main body and the end head.

5. The explosion-proof flexible pipe joint assembly according to claim 4, characterized in that: The insertion portion of the main body has a plurality of annular grooves arranged along the axial direction; the cross-sectional diameter of each annular groove is slightly larger than the inner diameter of the explosion-proof flexible tube; Wherein, when the main body is inserted into the interior of the explosion-proof flexible tube, the outer peripheral wall of each annular groove is suitable for abutting against the protective cushion layer.

6. The explosion-proof flexible pipe joint assembly according to claim 5, characterized in that: The cross-sectional diameter of each annular groove gradually decreases in a direction away from the end head.

7. The explosion-proof flexible pipe joint assembly according to claim 4, characterized in that: The inner wall of the fixing sleeve is provided with a plurality of annular protrusions arranged along the axis direction of the fixing sleeve; the cross-sectional diameter of each annular protrusion is slightly smaller than the outer diameter of the explosion-proof flexible tube; Wherein, when the main body is inserted into the interior of the explosion-proof flexible tube and the fixing sleeve is placed outside the explosion-proof flexible tube, each of the annular protrusions is suitable for abutting against the outer wall of the explosion-proof flexible tube.

8. The explosion-proof flexible pipe joint assembly according to claim 7, characterized in that: The diameter of each annular protrusion gradually decreases in a direction away from the end head.

9. The explosion-proof flexible pipe joint assembly according to claim 4, characterized in that: The fixing sleeve also has a second insulating ring; the second insulating ring is sleeved on the main body, and the second insulating ring is located between the second convex ring and the explosion-proof flexible tube; Wherein, when the main body is inserted into the explosion-proof flexible tube and the fixing sleeve is placed outside the explosion-proof flexible tube, the two ends of the second insulating ring are suitable for respectively abutting against the second convex ring and the explosion-proof flexible tube.

10. The explosion-proof flexible pipe joint assembly according to claim 1, characterized in that: The main body has an inclined platform at one end facing away from the end head, and the cross-sectional diameter of the inclined platform gradually decreases in the direction facing away from the end head; Wherein, when the main body is inserted into the interior of the explosion-proof flexible tube, the inclined platform is suitable for abutting against the inner wall of the explosion-proof flexible tube.

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