Anti-falling hydraulic hose connector with secondary fixing structure

Abstract

The invention discloses an anti-falling hydraulic hose connector with a secondary fixing structure, and relates to the related technical field of hydraulic hose connectors, the anti-falling hydraulic hose connector comprises a hydraulic pipe main body and a pipe head connecting seat mounted at hydraulic equipment, and a plurality of threaded connectors are uniformly distributed on the surface of the pipe head connecting seat in an array manner; a nut corresponding to the threaded connector is arranged on the outer side of the hydraulic pipe connector, and a first sealing washer is arranged between the threaded connector and the hydraulic pipe connector. A connecting sheath is arranged on the outer side, corresponding to the nut, of the threaded connector, a limiting groove is formed in the connecting sheath, and a second sealing gasket is arranged in the limiting groove; outer limiting pieces are arranged at the upper end and the lower end of the outer side of the connecting sheath. The connecting sheath is further arranged outside the nut to form a secondary fixing structure, meanwhile, limiting adjusting structures such as the outer limiting piece are matched, the external protection performance of the connecting part is synchronously improved, through close fit of all the structures, the hydraulic pipe body is not prone to falling off, and the service life is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field related to hydraulic pipe joints, and in particular to an anti-falling hydraulic hose joint with a secondary fixing structure. Background Art

[0002] Hydraulic equipment is very common in modern production machines. The hydraulic system of hydraulic equipment usually needs to connect various hydraulic components through corresponding hydraulic hoses. Hydraulic power is transmitted by conveying high-pressure media such as water, gas, and oil to ensure the circulation of liquid and the transmission of liquid energy. The hydraulic hose itself needs to be connected to the hydraulic component through a hose connector when used. The connector is the connection node between the component and the pipeline. In common structures, the connector is mostly connected and sealed by threaded connection during installation.

[0003] Existing equipment such as CN212776172U a hydraulic hose assembly joint, which includes a multi-interface structure that also uses a threaded connection method to facilitate quick disassembly and flexible use. However, the working process of many hydraulic equipment will cause the hydraulic components to perform large-scale relative movement and generate continuous working vibrations. Under simple thread fixation, the connection reliability of the joint is poor and it is easy to loosen in a long-term harsh working environment. Once the joint is loose, the sealing of the hydraulic hose cannot be guaranteed, which is easy to cause oil leakage and even the hydraulic hose to fall off, causing safety hazards. There are also such as CN218818793U A hydraulic hose connector that prevents loosening can effectively prevent the hydraulic hose connector from loosening by adopting additional limit nuts, fixing bolts, fixing clamps, reinforcing bolts and limit plates, and effectively improves the fixing effect of the connection between connector one and connector two. However, the installation of multiple fixing structures is more complicated, especially some hydraulic equipment has multiple interfaces used simultaneously, and multiple interfaces are not convenient for quick fixing. At the same time, multiple interfaces lack additional external protection during operation, which can easily affect the overall service life of the hydraulic hose. In view of this, in-depth research was conducted on the above-mentioned problems, resulting in this case. Summary of the invention

[0004] The object of the present invention is to provide an anti-dropping hydraulic hose connector with a secondary fixing structure to solve the problem in the above background technology that the hydraulic hose connector lacks additional fixing and protection and the multi-interface connection is inconvenient to install.

[0005] To achieve the above object, the present invention provides the following technical solution: an anti-drop hydraulic hose connector with a secondary fixing structure, comprising a hydraulic pipe body and a pipe head connection seat installed at a hydraulic device, and a hydraulic pipe connector is provided at a port of the hydraulic pipe body, and the hydraulic pipe body and the pipe head connection seat are connected through the hydraulic pipe connector; A number of threaded joints are evenly distributed in an array on the surface of the pipe head connecting seat, and nuts are arranged corresponding to the threaded joints on the outer side of the hydraulic pipe joint; The threaded joint and the nut form a threaded connection, and a first sealing washer is arranged between the threaded joint and the hydraulic pipe joint, forming a primary fixed sealing protection structure; A connecting sheath is arranged corresponding to the nut on the outer side of the threaded joint, and the connecting sheath forms a front-back translation movable structure on the outer sides of the threaded joint and the nut; A limiting groove is formed inside the connecting sheath, and a second sealing washer is arranged inside the limiting groove, and the nut rotates and is limited inside the limiting groove, forming a secondary fixed sealing protection structure; Outer limiting members are arranged at both the upper and lower ends of the outer side of the connecting sheath, and the main body of the outer limiting member is a limiting pull rod for adjusting and limiting the front-back displacement of the connecting sheath; The end of the limiting pull rod is an elastic supporting end, and the top of the elastic supporting end is a limiting hoop, and the limiting hoop is fixedly clamped on the outer side of the corresponding hydraulic pipe main body, forming a synchronous supporting structure for the connection part of the hydraulic pipe main body.

[0006] Preferably, the front and rear ends of the connecting sheath are respectively a limiting end and a fitting movable end, and the limiting groove is located inside the limiting end, and the limiting groove is a hexagonal column-shaped counterbore structure corresponding to the specification of the nut.

[0007] Adopting the above technical solution, the initial position of the connecting sheath is at the rear. After the nut is threadedly connected for primary fixed sealing, the connecting sheath moves forward, and the limiting groove is sleeved on the outer side of the nut, thereby preventing the further rotation of the nut and performing secondary fixed limiting.

[0008] Preferably, an inner ring body is integrally arranged at the rear side inside the limiting groove, and the second sealing washer is located at the front side of the inner ring body, and the second sealing washer is hermetically fitted between the nut and the inner ring body.

[0009] Adopting the above technical solution, while the connecting sheath moves forward for secondary fixation, the second sealing washer and the inner ring body move forward synchronously and are fitted to the front joint of the nut for auxiliary sealing.

[0010] Preferably, fitting grooves are respectively formed at the upper and lower ends of the fitting movable end corresponding to the outer limiting member, and the limiting pull rod is movably arranged at the fitting grooves.

[0011] Adopting the above technical solution, the fitting grooves are used to cooperate with the movable installation of the limiting pull rod. Through the fitting movement of the limiting pull rod and the fitting grooves, the displacement of the fitting movable end and the whole connecting sheath is adjusted and limited.

[0012] Preferably, the end of the limiting pull rod is a movable connection end, and a movable shaft is arranged on the outer side of the movable connection end, and the limiting pull rod is movably connected to the pipe head connecting seat through the movable shaft.

[0013] With the above technical solution, the limit tie rod is an active adjustment structure movably connected to the pipe head connection seat through a movable shaft, and the connection sheath is synchronously fitted and adjusted by the rotational movement of the limit tie rod at the movable shaft.

[0014] Preferably, the fitting surface of the movable connection end and the fitting groove is a fitting arc surface, and the limit tie rod and the fitting arc surface as a whole form a deflection structure with the movable shaft as the axis. At the same time, the fitting arc surface forms an active pushing structure for the fitting groove and the connection sheath as a whole.

[0015] With the above technical solution, since there is a fitting arc surface between the outer limit member and the connection sheath during the movement of the outer limit member, when the outer limit member deflects forward around the movable shaft, through the synchronous pressing and pushing of the fitting arc surface, the forward movement adjustment of the connection sheath is driven. The outer limit member can maintain the limit on the forward-moved connection sheath by remaining in the forward-deflected state.

[0016] Preferably, the limit tie rods are symmetrically arranged at the upper and lower ends of the connection sheath, and the limit tie rods intersect obliquely at the front end of the connection sheath. The limit hoop is located at the intersection of the limit tie rods.

[0017] With the above technical solution, the symmetrically arranged limit tie rods at the upper and lower sides are convenient for limit adjustment. At the same time, they expand forward and cooperate with the elastic support end to form a support structure outside the connection part, which can play an effective protective role. At the same time, the hydraulic pipe main body is connected through the limit hoop, and the connection part of the hydraulic pipe main body can also play an auxiliary support role, which helps to improve the service life in hydraulic activity equipment.

[0018] Preferably, an outer protective shell is sleeved on the outside of the whole pipe head connection seat, and an outer through hole is left at the front end of the outer protective shell, and the hydraulic pipe main body passes through the outer through hole; A fixed ear plate is arranged on the side of the outer protective shell, and a fixed bolt is connected to the fixed ear plate for bolt connection between the outer protective shell and the pipe head connection seat.

[0019] With the above technical solution, the outer protective shell can be used for cooperation and protection in a harsh equipment environment, avoiding the direct exposure of the pipe head connection seat outside, and playing an overall protective role for the connection part.

[0020] Preferably, the threaded joints are arranged in a staggered manner up and down inside the outer protective shell, and elastic fitting plates are arranged both up and down inside the outer protective shell. And a limit insertion rod is horizontally penetrated through the middle of the outer protective shell. The elastic fitting plates and the limit insertion rod are respectively in limit fitting with the adjacent outer limit members.

[0021] With the above technical solution, several threaded joints and corresponding connection structures are arranged vertically staggered at the pipe head connection seat. When the outer protective shell is fitted and connected with the pipe head connection seat, the elastic fitting plate can be fitted and limited with the uppermost and lowermost outer limit members. At the same time, the horizontally inserted limit rod in the middle is fitted and limited with the adjacent outer limit members in the middle in a staggered manner, so as to synchronously maintain the fitting and limitation of multiple outer limit members without the need for separate additional fixation, which is convenient for installation and limitation.

[0022] Preferably, a fitting airbag is arranged between the elastic fitting plate and the inner wall of the outer protective shell, and a protective airbag is integrally arranged at the front end of the fitting airbag. The protective airbag is located between the outer through hole and the hydraulic pipe main body, and the protective airbag is inflated synchronously with the elastic fitting plate pressing the fitting airbag.

[0023] With the above technical solution, the airbag structure is used to provide further flexible protection in cooperation with the outer protective shell. In the initial state, the protective airbag is in a deflated state, and the hydraulic pipe main body can normally pass through the outer through hole. When the outer protective shell is installed, the outer limit member squeezes the elastic fitting plate and the fitting airbag, and the fitting airbag compresses the protective airbag to inflate, providing flexible airbag support for the hydraulic pipe main body at the outer through hole, effectively improving the protection effect.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows: The anti-drop hydraulic hose joint with a secondary fixing structure, while further providing a connection sheath outside the nut to form a secondary fixing structure, cooperates with a limit adjustment structure such as an outer limit member to synchronously improve the external protection performance of the connection part. Through the close cooperation of each structure, the hydraulic pipe main body is less likely to fall off, improving the service life. Specifically, it includes: 1. A connection sheath structure is provided to cooperate with the nut structure for threaded connection for secondary fixing. During the connection process of the hydraulic hose joint, after the nut is threadedly connected and fixed with the threaded joint, the connection sheath can be movably sleeved outside the nut, and the nut is stopped and limited by cooperating with the limit groove, effectively avoiding the loosening of the nut caused by factors such as vibration during the operation of the equipment, and effectively avoiding the loosening of the hydraulic hose joint.

[0025] 2. An outer limit member is provided to cooperate with the connection sheath for limit adjustment. During the process of adjusting the connection sheath, by directly pulling the outer limit member outside, the connection sheath can be pressed to move forward to limit the nut. At the same time, the outer limit member is supported and fixed on the outer side of the corresponding hydraulic pipe main body through the line elastic support end and the limit hoop structure, that is, while limiting, an auxiliary protection structure is formed at the connection, better protecting the hydraulic hose and preventing the hydraulic hose from being damaged by external extrusion and other factors, thereby improving the service life of the hydraulic hose.

[0026] 3. When used in conjunction with a multi-interface hydraulic device, an outer protective shell is provided for further protective use. Through the outer protective shell, a limiting structure that cooperates with an elastic fitting plate and a limiting insertion rod is provided, which facilitates the rapid synchronous limiting of the outer limiting members of the multi-interface array. While facilitating installation and use, the outer protective shell is combined with a synchronous installation structure of a fitting airbag and a protective airbag, and without additional adjustment of the airbag, the supporting structure of the auxiliary airbag can be completed simultaneously during the installation process, facilitating cooperation with multiple ports for simultaneous operation, improving operation efficiency, and enhancing equipment safety at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Schematic diagram of the overall structure of Embodiment 1 of the present invention; Figure 2 Schematic diagram of the structure when the connection sheath of the present invention is docked; Figure 3 Schematic diagram of the structure when the connection sheath of the present invention is not docked; Figure 4 Schematic diagram of the internal structure when the connection sheath of the present invention is docked; Figure 5 For the present invention Figure 4 Enlarged structure schematic diagram at position a in; Figure 6 Schematic diagram of the internal structure when the connection sheath of the present invention is not docked; Figure 7 For the present invention Figure 6 Enlarged structure schematic diagram at position b in; Figure 8 Schematic diagram of the overall structure of Embodiment 2 of the present invention; Figure 9 Schematic diagram of the internal structure of the outer protective shell of Embodiment 2 of the present invention; Figure 10 For the present invention Figure 9 Enlarged structure schematic diagram at position c in.

[0028] In the figure: 1, main body of the hydraulic pipe; 2, pipe head connection seat; 3, hydraulic pipe joint; 4, threaded joint; 5, nut; 6, first sealing washer; 7, connection sheath; 71, limiting groove; 72, limiting end; 73, fitting movable end; 74, inner ring body; 75, fitting groove; 8, second sealing washer; 9, outer limiting member; 91, limiting pull rod; 92, elastic supporting end; 93, limiting hoop; 94, movable connection end; 95, movable shaft; 96, fitting arc surface; 10, outer protective shell; 11, outer through hole; 12, fixed ear plate; 13, fixed bolt; 14, elastic fitting plate; 15, limiting insertion rod; 16, fitting airbag; 17, protective airbag. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0030] Embodiment 1. Please refer to Figures 1 - 7 , the present invention provides a technical solution: an anti-drop hydraulic hose joint with a secondary fixing structure, which includes a hydraulic pipe main body 1 and a pipe head connection seat 2 installed at a hydraulic device, and a hydraulic pipe joint 3 is provided at the port of the hydraulic pipe main body 1. The hydraulic pipe main body 1 and the pipe head connection seat 2 are connected through the hydraulic pipe joint 3; a plurality of threaded joints 4 are evenly distributed in an array on the surface of the pipe head connection seat 2, and a nut 5 is provided on the outer side of the hydraulic pipe joint 3 corresponding to the threaded joint 4; the threaded joint 4 and the nut 5 form a threaded connection, and a first sealing washer 6 is provided between the threaded joint 4 and the hydraulic pipe joint 3 to form a primary fixing and sealing protection structure; a connection sheath 7 is provided on the outer side of the threaded joint 4 corresponding to the nut 5, and the connection sheath 7 forms a front-back translation movable structure on the outer sides of the threaded joint 4 and the nut 5; a limiting groove 71 is opened inside the connection sheath 7, and a second sealing washer 8 is provided inside the limiting groove 71, and the nut 5 is rotationally limited inside the limiting groove 71 to form a secondary fixing and sealing protection structure; outer limiting members 9 are provided at both the upper and lower ends of the outer side of the connection sheath 7, and the main body of the outer limiting member 9 is a limiting pull rod 91 for adjusting and limiting the front-back displacement of the connection sheath 7; the end of the limiting pull rod 91 is an elastic support end 92, and the top of the elastic support end 92 is a limiting hoop 93, and the limiting hoop 93 is fixedly clamped on the outer side of the corresponding hydraulic pipe main body 1 to form a synchronous support structure for the connection of the hydraulic pipe main body 1.

[0031] The front and rear ends of the connecting sheath 7 are respectively a limiting end 72 and a fitting movable end 73, and the limiting groove 71 is located inside the limiting end 72. The limiting groove 71 is a hexagonal prism-shaped counterbore structure corresponding to the specification of the nut 5. The initial position of the connecting sheath 7 is rearward. After the nut 5 is threadedly connected for the first time for fixed sealing, the connecting sheath 7 moves forward, and the limiting groove 71 is sleeved outside the nut 5, thereby preventing the further rotation of the nut 5 and performing secondary fixed limiting. An inner ring body 74 is integrally provided at the rear side inside the limiting groove 71, and the second sealing washer 8 is located at the front side of the inner ring body 74. The second sealing washer 8 is sealingly fitted between the nut 5 and the inner ring body 74. While the connecting sheath 7 moves forward for secondary fixation, the second sealing washer 8 and the inner ring body 74 move forward synchronously and fit to the front joint of the nut 5 for auxiliary sealing. Fitting grooves 75 are respectively formed at the upper and lower ends of the fitting movable end 73 corresponding to the outer limiting member 9, and the limiting pull rod 91 is movably arranged at the fitting grooves 75. The fitting grooves 75 are used to cooperate with the movable installation of the limiting pull rod 91. Through the fitting movement of the limiting pull rod 91 and the fitting grooves 75, the displacement adjustment and limiting of the fitting movable end 73 and the whole connecting sheath 7 are carried out.

[0032] The end of the limiting pull rod 91 is a movable connection end 94, and a movable shaft 95 is arranged outside the movable connection end 94. The limiting pull rod 91 and the pipe head connection seat 2 are movably connected through the movable shaft 95. The limiting pull rod 91 is a movable adjustment structure movably connected to the pipe head connection seat 2 through the movable shaft 95. The connecting sheath 7 is synchronously fitted and adjusted through the rotational movement of the limiting pull rod 91 at the movable shaft 95. The fitting surface of the movable connection end 94 and the fitting groove 75 is a fitting arc surface 96, and the whole limiting pull rod 91 and the fitting arc surface 96 form a deflection structure with the movable shaft 95 as the axis. At the same time, the fitting arc surface 96 forms a movable pushing structure for the whole fitting groove 75 and the connecting sheath 7. Since there is a fitting arc surface 96 between the outer limiting member 9 and the connecting sheath 7 during the movement of the outer limiting member 9, when the outer limiting member 9 deflects forward around the movable shaft 95, through the synchronous pressing and pushing of the fitting arc surface 96, the forward movement adjustment of the connecting sheath 7 is driven. When the outer limiting member 9 maintains the forward deflection state, the forward-moved connecting sheath 7 can be limited. The limiting pull rods 91 are symmetrically arranged at the upper and lower ends of the connecting sheath 7, and the limiting pull rods 91 intersect obliquely at the front end of the connecting sheath 7. The limiting hoop 93 is located at the intersection position of the limiting pull rods 91. The symmetrically arranged limiting pull rods 91 at the upper and lower sides are convenient for limiting adjustment, and at the same time, they are unfolded forward to cooperate with the elastic support end 92 to form a support structure outside the connection part, which can play an effective protective role. At the same time, the hydraulic pipe main body 1 is connected through the limiting hoop 93, and the connection part of the hydraulic pipe main body 1 can also play an auxiliary support role, which is helpful for improving the service life in the hydraulic activity equipment.

[0033] Example 2, please refer to Figures 2 - 10, the present invention provides a technical solution for a multi-interface hydraulic system in a harsh environment: an anti-drop hydraulic hose joint with a secondary fixing structure, including a hydraulic pipe main body 1 and a pipe head connection seat 2 installed at a hydraulic device, and a hydraulic pipe joint 3 is provided at the port of the hydraulic pipe main body 1. The hydraulic pipe main body 1 and the pipe head connection seat 2 are connected through the hydraulic pipe joint 3; a plurality of threaded joints 4 are evenly distributed in an array on the surface of the pipe head connection seat 2, and a nut 5 is provided on the outer side of the hydraulic pipe joint 3 corresponding to the threaded joint 4; the threaded joint 4 and the nut 5 form a threaded connection, and a first sealing washer 6 is provided between the threaded joint 4 and the hydraulic pipe joint 3 to form a primary fixed sealing protection structure; a connection sheath 7 is provided on the outer side of the threaded joint 4 corresponding to the nut 5, and the connection sheath 7 forms a front-back translation movable structure on the outer sides of the threaded joint 4 and the nut 5; a limiting groove 71 is opened inside the connection sheath 7, and a second sealing washer 8 is provided inside the limiting groove 71, and the nut 5 is rotationally limited inside the limiting groove 71 to form a secondary fixed sealing protection structure; outer limiting members 9 are provided at both the upper and lower ends of the outer side of the connection sheath 7, and the main body of the outer limiting member 9 is a limiting pull rod 91 for adjusting and limiting the front-back displacement of the connection sheath 7; the end of the limiting pull rod 91 is an elastic supporting end 92, and the top of the elastic supporting end 92 is a limiting hoop 93, and the limiting hoop 93 is fixedly clamped on the outer side of the corresponding hydraulic pipe main body 1 to form a synchronous supporting structure for the connection part of the hydraulic pipe main body 1.

[0034] The front and rear ends of the connection sheath 7 are respectively a limiting end 72 and a fitting movable end 73, and the limiting groove 71 is located inside the limiting end 72. The limiting groove 71 is a hexagonal prism-shaped counterbore structure corresponding to the specification of the nut 5. The initial position of the connection sheath 7 is relatively backward. After the nut 5 is threadedly connected for primary fixed sealing, the connection sheath 7 moves forward, and the limiting groove 71 is sleeved on the outer side of the nut 5, thereby preventing the further rotation of the nut 5 for secondary fixed limiting. An inner ring body 74 is integrally provided at the rear side inside the limiting groove 71, and the second sealing washer 8 is located at the front side of the inner ring body 74. The second sealing washer 8 is hermetically fitted between the nut 5 and the inner ring body 74. While the connection sheath 7 moves forward for secondary fixation, the second sealing washer 8 and the inner ring body 74 synchronously move forward and fit to the front joint of the nut 5 for auxiliary sealing. Fitting grooves 75 are respectively opened at the upper and lower ends of the fitting movable end 73 corresponding to the outer limiting member 9, and the limiting pull rod 91 is movably arranged at the fitting grooves 75. The fitting grooves 75 are used to cooperate with the movable installation of the limiting pull rod 91. Through the fitting movement of the limiting pull rod 91 and the fitting grooves 75, the displacement adjustment and limitation of the fitting movable end 73 and the connection sheath 7 as a whole are carried out.

[0035] The end of the limit pull rod 91 is a movable connection end 94, and a movable shaft 95 is arranged outside the movable connection end 94. The limit pull rod 91 and the pipe head connection seat 2 are movably connected through the movable shaft 95. The limit pull rod 91 is a movable adjustment structure movably connected to the pipe head connection seat 2 through the movable shaft 95, and the connection sheath 7 is synchronously fitted and adjusted by the rotational movement of the limit pull rod 91 at the movable shaft 95. The fitting surface of the movable connection end 94 and the fitting groove 75 is a fitting arc surface 96, and the limit pull rod 91 and the fitting arc surface 96 as a whole form a deflection structure with the movable shaft 95 as the axis. At the same time, the fitting arc surface 96 forms a movable pushing structure for the fitting groove 75 and the connection sheath 7 as a whole. Since there is a fitting arc surface 96 between the outer limit member 9 and the connection sheath 7 during the movement of the outer limit member 9, when the outer limit member 9 deflects forward around the movable shaft 95, through the synchronous pressing and pushing of the fitting arc surface 96, the forward movement of the connection sheath 7 is driven for adjustment. As long as the outer limit member 9 maintains the forward deflection state, the forward-moved connection sheath 7 can be limited. The limit pull rods 91 are symmetrically arranged at the upper and lower ends of the connection sheath 7, and the limit pull rods 91 intersect obliquely at the front end of the connection sheath 7. The limit clamp 93 is located at the intersection of the limit pull rods 91. The symmetrically arranged limit pull rods 91 at the upper and lower ends are convenient for limit adjustment. At the same time, they expand forward to cooperate with the elastic support end 92 to form a support structure outside the connection part, which can play an effective protective role. At the same time, the hydraulic pipe main body 1 is connected through the limit clamp 93, and the connection part of the hydraulic pipe main body 1 can also play an auxiliary support role, which helps to improve the service life in the hydraulic activity equipment.

[0036] An outer protective shell 10 is sleeved on the outside of the overall pipe head connecting seat 2. The front end of the outer protective shell 10 has an outer through hole 11, and the hydraulic pipe main body 1 passes through the outer through hole 11. Fixed ear plates 12 are arranged on the side of the outer protective shell 10, and fixing bolts 13 are connected to the fixed ear plates 12 for bolt connection between the outer protective shell 10 and the pipe head connecting seat 2. The outer protective shell 10 can be used for cooperative protection in a harsh equipment environment to prevent the pipe head connecting seat 2 from being directly exposed outside, playing an overall protective role for the connection part. The threaded joints 4 are arranged in a staggered manner up and down inside the outer protective shell 10. Elastic fitting plates 14 are arranged both above and below inside the outer protective shell 10. A limiting insertion rod 15 is horizontally penetrated through the middle of the outer protective shell 10. The elastic fitting plates 14 and the limiting insertion rod 15 are respectively in limiting fit with the adjacent outer limiting members 9. A number of threaded joints 4 and corresponding connection structures are arranged in a staggered manner up and down at the pipe head connecting seat 2. When the outer protective shell 10 is cooperatively connected with the pipe head connecting seat 2, the elastic fitting plates 14 can be in limiting fit with the uppermost and lowermost outer limiting members 9. At the same time, the horizontally inserted limiting insertion rod 15 in the middle is in staggered fit and limit with the adjacent outer limiting members 9 in the middle, so as to synchronously maintain the fitting limit of multiple outer limiting members 9, without the need for separate additional fixation, which is convenient for installation and limitation. A fitting airbag 16 is arranged between the elastic fitting plate 14 and the inner wall of the outer protective shell 10. A protective airbag 17 is integrally arranged at the front end of the fitting airbag 16. The protective airbag 17 is located between the outer through hole 11 and the hydraulic pipe main body 1. The protective airbag 17 is inflated synchronously with the elastic fitting plate 14 pressing the fitting airbag 16. The airbag structure is used to provide further flexible protection in cooperation with the outer protective shell 10. In the initial state, the protective airbag 17 is in a deflated state, and the hydraulic pipe main body 1 can normally pass through the outer through hole 11. When the outer protective shell 10 is installed, the outer limiting member 9 squeezes the elastic fitting plate 14 and the fitting airbag 16, and the fitting airbag 16 compresses the protective airbag 17 to inflate, providing flexible airbag support for the hydraulic pipe main body 1 at the outer through hole 11, effectively improving the protective effect.

[0037] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art. Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An anti-drop hydraulic hose connector with a secondary fixing structure, comprising a hydraulic hose body (1) and a pipe head connection seat (2) installed at a hydraulic device, and a hydraulic hose connector (3) is provided at a port of the hydraulic hose body (1), wherein the hydraulic hose body (1) and the pipe head connection seat (2) are connected via the hydraulic hose connector (3), characterized in that: The surface of the pipe head connection seat (2) is provided with a plurality of threaded joints (4) evenly distributed in an array, and a nut (5) is provided on the outer side of the hydraulic pipe joint (3) corresponding to the threaded joint (4); The threaded joint (4) and the nut (5) form a threaded connection, and a first sealing gasket (6) is provided between the threaded joint (4) and the hydraulic pipe joint (3), forming a primary fixed sealing protection structure; A connecting sleeve (7) is provided on the outer side of the threaded joint (4) corresponding to the nut (5), and the connecting sleeve (7) forms a forward and backward translation movable structure on the outer side of the threaded joint (4) and the nut (5); The connection sleeve (7) is provided with a limiting groove (71) inside, a second sealing gasket (8) is arranged inside the limiting groove (71), and the nut (5) is rotated and limited inside the limiting groove (71), thereby forming a secondary fixed sealing protection structure; The upper and lower ends of the outer side of the connecting sleeve (7) are both provided with external limiting members (9), and the main body of the external limiting member (9) is a limiting pull rod (91) used for adjusting the front and rear displacement of the connecting sleeve (7); The end of the limiting pull rod (91) is an elastic support end (92), and the top of the elastic support end (92) is a limiting clamp (93), and the limiting clamp (93) is clamped and fixed on the outside of the corresponding hydraulic pipe body (1), forming a synchronous support structure for the connection of the hydraulic pipe body (1).

2. The anti-drop hydraulic hose connector with a secondary fixing structure according to claim 1, characterized in that: The front and rear ends of the connecting sleeve (7) are respectively a limiting end (72) and a fitting movable end (73), and the limiting groove (71) is located inside the limiting end (72). The limiting groove (71) is a hexagonal columnar countersunk structure corresponding to the specifications of the nut (5).

3. The anti-drop hydraulic hose connector with a secondary fixing structure according to claim 2, characterized in that: An inner ring body (74) is integrally provided on the rear side of the limiting groove (71), and a second sealing gasket (8) is located on the front side of the inner ring body (74). The second sealing gasket (8) is sealed between the nut (5) and the inner ring body (74).

4. The anti-drop hydraulic hose connector with a secondary fixing structure according to claim 2, characterized in that: The upper and lower ends of the fitting movable end (73) are both provided with fitting grooves (75) corresponding to the outer limiting member (9), and the limiting pull rod (91) is movably arranged at the fitting groove (75).

5. The anti-drop hydraulic hose connector with a secondary fixing structure according to claim 4, characterized in that: The end of the limit pull rod (91) is a movable connection end (94), and a movable shaft (95) is arranged outside the movable connection end (94). The limit pull rod (91) and the pipe head connecting seat (2) are movably connected via the movable shaft (95).

6. The anti-drop hydraulic hose connector with a secondary fixing structure according to claim 5, characterized in that: The fitting surfaces of the movable connection end (94) and the fitting groove (75) are fitting arc surfaces (96), and the limiting pull rod (91) and the fitting arc surfaces (96) as a whole form a deflection structure with the movable shaft (95) as the axis, and the fitting arc surfaces (96) form a movable pushing structure for the fitting groove (75) and the connecting sleeve (7) as a whole.

7. The anti-drop hydraulic hose connector with a secondary fixing structure according to claim 6, characterized in that: The limiting pull rod (91) is symmetrically arranged at the upper and lower ends of the connecting sleeve (7), and the limiting pull rod (91) is inclined and intersected at the front end of the connecting sleeve (7), and the limiting clamp (93) is located at the intersection of the limiting pull rod (91).

8. The anti-drop hydraulic hose connector with a secondary fixing structure according to claim 1, characterized in that: The outer side of the pipe head connection seat (2) is provided with an outer protective shell (10), and an outer through hole (11) is left at the front end of the outer protective shell (10), and the hydraulic pipe body (1) is arranged to pass through the outer through hole (11); A fixing ear plate (12) is provided on the side of the outer protective shell (10), and a fixing bolt (13) is connected to the fixing ear plate (12) for bolt connection between the outer protective shell (10) and the pipe head connecting seat (2).

9. The anti-drop hydraulic hose connector with a secondary fixing structure according to claim 8, characterized in that: The threaded joints (4) are arranged in an alternating manner up and down inside the outer protective shell (10), and elastic fitting plates (14) are provided up and down inside the outer protective shell (10), and a limit insertion rod (15) is provided transversely through the middle of the outer protective shell (10), and the elastic fitting plates (14) and the limit insertion rod (15) are respectively limitedly fitted with adjacent outer limit members (9).

10. The anti-drop hydraulic hose connector with a secondary fixing structure according to claim 9, characterized in that: A fitting airbag (16) is provided between the elastic fitting plate (14) and the inner wall of the outer protective shell (10), and a protective airbag (17) is integrally provided at the front end of the fitting airbag (16); the protective airbag (17) is located between the outer through hole (11) and the hydraulic pipe body (1), and the protective airbag (17) is inflated and filled synchronously with the elastic fitting plate (14) pressing the fitting airbag (16).

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