A swing hose

Abstract

The application discloses a swing hose, which comprises a first flange plate, a first bellows, a transition flange plate, a second bellows and a second flange plate connected in sequence, and a plurality of auxiliary mechanisms are uniformly arranged between the first flange plate and the transition flange plate and between the transition flange plate and the second flange plate, the auxiliary mechanisms comprise first connecting rods and second connecting rods, the two end faces of the transition flange plate are uniformly provided with the first connecting rods in a rotating fit mode, the end faces of the first flange plate and the second flange plate are uniformly provided with the second connecting rods in a rotating fit mode, and the first connecting rods and the second connecting rods are connected in a rotating fit mode through positioning shafts, when eccentric motion occurs in the first bellows and the second bellows, the first connecting rods, the positioning shafts and the second connecting rods follow the eccentric motion of the first bellows and the second bellows, and the stability of the eccentric motion of the first bellows and the second bellows is enhanced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hoses, in particular to a swing hose. BACKGROUND

[0002] It is known that the swing hose is a key component connecting the rocket engine and the nozzle, which changes the direction of the flame by swinging to adjust the flight attitude of the rocket. As the fuel delivery pipeline of the rocket engine, if the swing hose is stuck during the flight of the rocket, the direction of the flame will deviate, and the flight attitude will be directly affected.

[0003] A swing hose structure is disclosed in a patent application with publication number CN216590455U and publication date May 24, 2022, and the name of the patent is "a swing hose structure". The patent discloses a swing hose structure, specifically relates to the technical field of corrugated hoses, and comprises a right connecting flange serving as a fixed end and a transition flange serving as a swing movable end. The transition flange is connected with a left inner connecting flange at the end. The left inner connecting flange is externally sleeved with a left outer connecting flange at one end away from the transition flange. The right connecting flange is internally inserted with a connecting pipe. The connecting pipe is externally sleeved with a swing hose outlet flange at one end away from the right connecting flange. The swing hose outlet flange is connected with the left outer connecting flange. The left inner connecting flange is connected with the connecting pipe. The utility model discloses a single-section corrugated pipe welding structure of the corrugated hose, which can withstand a large internal pressure when the free end swings at a large swing angle, and can compensate for the displacement of the pipeline system. The compact and simple corrugated hose structure is reliable in connection, easy to install, high in pressure resistance and long in service life.

[0004] The swing hose in the prior art is only suitable for uniform deformation due to the internal setting of the inner sleeve piece, and is not suitable for eccentric working conditions. The swing hose designed in this way requires that the center of the hose and the center of the swing shaft are in the same plane, otherwise the swing hose cannot work normally. At the same time, the swing angle that can be achieved by the engine is limited, which limits the use of the engine. SUMMARY

[0005] The purpose of the present application is to provide a swing hose to solve the above-mentioned problems in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a swing hose, comprising a first flange, a first bellows, a transition flange, a second bellows, and a second flange connected in sequence. The first flange and the transition flange are connected to each other and to the second flange via a plurality of evenly arranged auxiliary mechanisms. Each auxiliary mechanism includes a first connecting rod and a second connecting rod. The two end faces of the transition flange are evenly provided with the first connecting rod in a rotatable fit, and the end faces of the first flange and the second flange are evenly provided with the second connecting rod in a rotatable fit. The first connecting rod and the second connecting rod are connected to each other via a positioning shaft in a rotatable fit.

[0007] The aforementioned auxiliary mechanism further includes a flat plate and an auxiliary shaft. The first connecting rod and the second connecting rod are both V-shaped. The first connecting rod is a first V-shaped rod, and the second connecting rod is a second V-shaped rod. Four flat plates are provided on each of the two end faces of the transition flange, one end face of the first flange, and one end face of the second flange. Two flat plates on the same end face form a group, and an auxiliary shaft is provided between a group of flat plates. The opening portions of the first V-shaped rod and the second V-shaped rod are connected to the auxiliary shaft in a rotatable fit. A connecting plate is provided at the connecting end of the first V-shaped rod, and a U-shaped plate is provided at the connecting end of the second V-shaped rod. A positioning shaft is provided between the two inner walls of the U-shaped plate, and the connecting plate is connected to the positioning shaft in a rotatable fit.

[0008] The auxiliary mechanism described above also includes a clamping rod. The two legs of the opening portion of the second V-shaped rod are connected by a square plate. Both the middle portion of the square plate and the middle portion of the U-shaped plate have through holes. The clamping rod is installed in the through holes in a sliding fit manner. One end of the clamping rod is pressed against the outer wall of the connecting plate.

[0009] As described above, the outer wall of the connecting plate consists of two arc-shaped surfaces with gradually increasing radii, and there is a certain height difference at the connection point of the two arc-shaped surfaces.

[0010] As described above, a return plate is provided on the part of the abutting rod located between the square plate and the U-shaped plate. The part of the abutting rod located between the return plate and the square plate is annular. A first elastic element is sleeved on the outer wall of the annular part of the abutting rod located between the return plate and the square plate, and the two ends of the first elastic element are respectively connected to the return plate and the square plate.

[0011] The auxiliary mechanism further includes a positioning disc. The second V-shaped rod is connected to the plate by a limiting shaft in a rotatable manner. The end of the limiting shaft near the abutting rod passes through the plate and is fitted with the positioning disc. The positioning of the limiting shaft and the second V-shaped rod is achieved by positioning the positioning disc.

[0012] The auxiliary mechanism described above also includes an arc panel. The top sidewall of the plate through which the limiting shaft passes is provided with an arc panel. A through hole is provided on the arc panel, and a limiting rod is installed in the through hole in a sliding fit manner. Multiple locking teeth are evenly provided on the outer wall of the positioning disc, and the limiting rod and locking teeth are used in conjunction.

[0013] As described above, two reset plates are symmetrically arranged on the outer wall of each of the limiting rods, and the reset plates and the arc panel are connected by a second elastic element. Two extrusion plates are symmetrically arranged on the outer wall of each of the abutting rods, and the extrusion plates abut against the ends of the limiting rods.

[0014] As mentioned above, a positioning mechanism is provided on the U-shaped plate, which is used to assist in the rotational connection between the connecting plate and the U-shaped plate.

[0015] As described above, an armored ring is provided outside the trough of each corrugation of the first and second corrugated pipes.

[0016] The beneficial effect of the present invention is that when the first corrugated pipe and the second corrugated pipe undergo eccentric movement, the stability of the eccentric movement of the first corrugated pipe and the second corrugated pipe is enhanced by the first connecting rod, the positioning shaft and the second connecting rod following the eccentric movement of the first corrugated pipe and the second corrugated pipe. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 For the present invention Figure 1 Top view;

[0020] Figure 3 For the present invention Figure 1 The front view;

[0021] Figure 4 For the present invention Figure 2 Schematic diagram of the cross-sectional structure at point AA;

[0022] Figure 5 For the present invention Figure 4 A partially enlarged cross-sectional structural diagram at point M;

[0023] Figure 6 For the present invention Figure 3 Schematic diagram of the cross-sectional structure at BB;

[0024] Figure 7 The application Figure 6 is a local enlarged sectional structure schematic view of N;

[0025] Figure 8 The application is a local sectional structure schematic view of a positioning mechanism;

[0026] Figure 9 The application is a perspective structure schematic view of an auxiliary mechanism;

[0027] Figure 10 The application is a perspective structure schematic view of a connecting disc;

[0028] Figure 11 The application Figure 6 is a local enlarged sectional structure schematic view of L.

[0029] Mark explanation:

[0030] 1, first flange disc; 2, first corrugated pipe; 3, transition flange disc; 4, second corrugated pipe; 5, second flange disc; 6, first V-shaped rod; 7, second V-shaped rod; 8, positioning shaft; 9, flat plate; 10, auxiliary shaft; 11, connecting disc; 12, U-shaped plate; 13, abutting rod; 14, square plate; 15, return plate; 16, first elastic member; 17, positioning disc; 18, arc surface; 19, arc plate; 20, limiting rod; 21, reset plate; 22, second elastic member; 23, extrusion plate; 24, driving rod; 25, annular groove; 26, driving groove; 27, auxiliary ring; 28, third elastic member; 29, circular ring groove; 30, fourth elastic member; 31, clamping groove; 32, clamping rod; 33, fifth elastic member; 34, V-shaped arc surface groove; 35, armored ring. DETAILED DESCRIPTION

[0031] In order for those skilled in the art to better understand the technical solutions of the present application, the present application will be further described in detail below with reference to the drawings.

[0032] As Figures 1 to 11 shown, the swing hose provided by the embodiment of the present application comprises a first flange disc 1, a first corrugated pipe 2, a transition flange disc 3, a second corrugated pipe 4 and a second flange disc 5 connected in sequence, the first flange disc 1 and the transition flange disc 3 and the transition flange disc 3 and the second flange disc 5 are connected through a plurality of auxiliary mechanisms arranged uniformly, the auxiliary mechanism comprises a first connecting rod and a second connecting rod, both end faces of the transition flange disc 3 are uniformly provided with the first connecting rod in a rotating fit manner, the end faces of the first flange disc 1 and the second flange disc 5 are uniformly provided with the second connecting rod in a rotating fit manner, and the first connecting rod and the second connecting rod 7 are connected through the positioning shaft 8 in a rotating fit manner.

[0033] Specifically, the swing hose is a key component connected with the engine and the nozzle, and is connected with the engine and the nozzle through the first flange plate 1 and the second flange plate 5 respectively, so that the first flange plate 1, the first bellows 2, the transition flange plate 3, the second bellows 4 and the second flange plate 5 can be used as the fuel delivery pipeline of the engine, the transition flange plate 3 on the swing hose can be provided in plurality, and each transition flange plate 3 is also connected through an auxiliary mechanism, the connection between the first flange plate 1 and the first bellows 2, the first bellows 2 and the transition flange plate 3, the transition flange plate 3 and the transition flange plate 3, and the transition flange plate 3 and the second bellows 4 can adopt various connection modes (such as welding, screwing, etc.), but the welding mode is the most stable, and the welding mode is preferred, and in order to improve the welding strength, a connecting compression ring (not shown in the figure) can also be arranged at the welding position to reinforce the connection between the first flange plate 1 and the first bellows 2, the first bellows 2 and the transition flange plate 3, and the transition flange plate 3 and the second bellows 4, to prevent the second bellows 4 and each flange plate from falling off, the swing hose in the prior art is provided with an inner sleeve, so that the swing hose is only suitable for uniform deformation (that is, only axial movement can be performed), and is not suitable for eccentric rotation, but in the embodiment, when the first bellows 2 and the second bellows 4 move axially or eccentrically, the first flange plate 1 and the transition flange plate 3 or the transition flange plate 3 and the second flange plate 5 adapt to the axial movement or eccentric rotation of the first bellows 2 or the second bellows 4, and rotate on the position of the positioning shaft 8 through the first connecting rod and the second connecting rod to adapt to the eccentric rotation or axial movement of the first bellows 2 and the second bellows 4, thereby enhancing the stability of the eccentric movement of the first bellows 2 and the second bellows 4, and preventing excessive axial movement or eccentric rotation of the first bellows 2 and the second bellows 4, in the embodiment, the eccentric rotation refers to that the first bellows 2 and the second bellows 4 do not stretch axially, but rotate to change the axis from a straight line to a curve, obviously, in the process of eccentric rotation, one side of the first bellows 2 and the second bellows 4 is relatively stretched, and the other side is relatively compressed, and the phenomenon of the first bellows 2 and the second bellows 4 and the flange plate being separated (that is, when the first bellows 2 and the second bellows 4 move axially to the maximum limit, the first bellows 2 and the second bellows 4 may be broken), which affects the normal operation of the rocket engine, but in the embodiment, when the first bellows 2 and the second bellows 4 move axially to the maximum limit, the connection of the first connecting rod, the second connecting rod and the positioning shaft 8 with the flange plate can prevent the flange plates from further moving axially, thereby reducing the risk of the first bellows 2 and the second bellows 4 and the flange plate being separated, and improving the stability of the axial movement of the first bellows 2 and the second bellows 4.

[0034] Further, the auxiliary mechanism further comprises flat plates 9 and auxiliary shafts 10, the first connecting rod and the second connecting rod are both V-shaped, the first connecting rod is a first V-shaped rod 6, and the second connecting rod is a second V-shaped rod 7, a plurality of, for example, four, flat plates 9 are arranged on each of the two end faces of the transition flange plate 3, one end face of the first flange plate 1 and one end face of the second flange plate 5, two flat plates 9 on the same end face form a group, an auxiliary shaft 10 is arranged between the two flat plates 9 of the group, the two legs of the open part of the first V-shaped rod 6 and the second V-shaped rod 7 are each connected to an auxiliary shaft 10 in a rotating fit manner, a connecting disc 11 is arranged at the connecting end (the other end opposite to the open end) of the first V-shaped rod 6, a U-shaped plate 12 is arranged at the connecting end (the other end opposite to the open end) of the second V-shaped rod 7, a positioning shaft 8 is arranged between the two inner walls of the U-shaped plate 12, and the connecting disc 11 is connected to the positioning shaft 8 in a rotating fit manner.

[0035] Specifically, when the first bellows 2 and the second bellows 4 are axially moved or eccentrically rotated, the first V-shaped rod 6 is rotated around the auxiliary shaft 10 under the drive of the transition flange 3 or the second V-shaped rod 7 is rotated around the auxiliary shaft 10 under the drive of the first flange 1 (or the second flange 5), and the first V-shaped rod 6 and the connecting plate 11 and the second V-shaped rod 7 and the connecting plate 11 are connected in a rotating manner through the auxiliary shaft 10, so that the first V-shaped rod 6 and the second V-shaped rod 7 can be rotated relative to each other at the position of the positioning shaft 8; (1) when the first bellows 2 and the second bellows 4 are axially stretched or the first bellows 2 and the second bellows 4 are eccentrically rotated, the first V-shaped rod 6 and the second V-shaped rod 7 are rotated around the positioning shaft 8 on the side of the relative stretching of the first bellows 2 and the second bellows 4, so that the included angle between the first V-shaped rod 6 and the second V-shaped rod 7 on the side close to the first bellows 2 or the second bellows 4 is increased, when the first bellows 2 and the second bellows 4 are axially stretched to the maximum, the first V-shaped rod 6 and the second V-shaped rod 7 are connected in a straight line through the positioning shaft 8, so that the first V-shaped rod 6, the positioning shaft 8 and the second V-shaped rod 7 are connected between the first flange 1 and the first bellows 2, the first bellows 2 and the transition flange 3, the transition flange 3 and the transition flange 3, and the transition flange 3 and the second bellows 4, preventing the first bellows 2 and the second bellows 4 from being excessively stretched axially and causing the first bellows 2 or the second bellows 4 to be separated from the flange, when the first bellows 2 and the second bellows 4 are eccentrically rotated to the maximum, the first V-shaped rod 6 and the second V-shaped rod 7 are rotated around the positioning shaft 8, so that the first V-shaped rod 6, the positioning shaft 8 and the second V-shaped rod 7 are stretched to the maximum, and the first bellows 2 and the second bellows 4 no longer eccentrically rotate, so as to ensure the stability of the eccentric rotation of the first bellows 2 and the second bellows 4;(2) When the first bellows 2 and the second bellows 4 move axially in contraction, or the first bellows 2 and the second bellows 4 rotate eccentrically, the relative compression side of the first bellows 2 and the second bellows 4, the first V-shaped rod 6 and the second V-shaped rod 7 rotate around the positioning shaft 8, so that the included angle between the first V-shaped rod 6 and the second V-shaped rod 7 on the side close to the first bellows 2 or the second bellows 4 decreases, when the first bellows 2 and the second bellows 4 move axially in stretching to the minimum, the first V-shaped rod 6 and the second V-shaped rod 7 are parallel through the positioning shaft 8 (that is, the first V-shaped rod 6 abuts on the U-shaped plate 12 of the second V-shaped rod 7), so that the first V-shaped rod 6, the positioning shaft 8 and the second V-shaped rod 7 connect the first flange plate 1 and the first bellows 2, the first bellows 2 and the transition flange plate 3, the transition flange plate 3 and the transition flange plate 3, and the transition flange plate 3 and the second bellows 4, prevent the first bellows 2 and the second bellows 4 from moving excessively in axial contraction, causing the first bellows 2 or the second bellows 4 to separate from the flange plate, when the first bellows 2 and the second bellows 4 rotate eccentrically to the minimum, the first V-shaped rod 6 and the second V-shaped rod 7 rotate around the positioning shaft 8, so that the first V-shaped rod 6, the positioning shaft 8 and the second V-shaped rod 7 stretch to the minimum, the first bellows 2 and the second bellows 4 no longer rotate eccentrically, to ensure the stability of the eccentric rotation of the first bellows 2 and the second bellows 4.

[0036] Further, the auxiliary mechanism further comprises an abutting rod 13, the middle parts of the two branches of the opening part of the second V-shaped rod 7 are connected through a square plate 14, the middle part of the square plate 14 and the middle part of the U-shaped plate 12 are both provided with through holes, the abutting rod 13 is installed in the through holes in a sliding fit manner, one end of the abutting rod 13 abuts on the outer wall of the connecting plate 11, specifically, when the first bellows 2 and the second bellows 4 move axially in stretching, or the first bellows 2 and the second bellows 4 rotate eccentrically, the relative stretching side of the first bellows 2 and the second bellows 4, the first V-shaped rod 6 and the second V-shaped rod 7 rotate around the positioning shaft 8, so that the included angle between the first V-shaped rod 6 and the second V-shaped rod 7 on the side close to the first bellows 2 or the second bellows 4 increases, when the included angle between the first V-shaped rod 6 and the second V-shaped rod 7 on the side close to the first bellows 2 or the second bellows 4 increases to a suitable angle, the abutting rod 13 is driven to slide in the through hole and make the two ends of the abutting rod 13 abut on the connecting plate 11 and the first flange plate 1 (or the second flange plate 5) respectively, so that the abutting rod 13 abuts and positions the connecting plate 11, the connecting plate 11 no longer rotates, which has a technical effect similar to braking, can stably position the first V-shaped rod 6 and the second V-shaped rod 7, so that the first bellows 2 (or the second bellows 4) no longer rotates eccentrically or moves axially in stretching.

[0037] Further, the outer wall of the connecting disc 11 is two arc surfaces 18 with gradually increasing radii, and the connecting position of the two arc surfaces 18 has a certain height difference (radial size difference). Specifically, (1) when the first bellows 2 and the second bellows 4 move axially or the first bellows 2 and the second bellows 4 rotate eccentrically, the first V-shaped rod 6 and the second V-shaped rod 7 rotate around the positioning shaft 8 on the side of the first bellows 2 and the second bellows 4 that is relatively stretched, so that the included angle on the side of the first V-shaped rod 6 and the second V-shaped rod 7 that is close to the first bellows 2 or the second bellows 4 increases, the first V-shaped rod 6 drives the connecting disc 11 to rotate, the second V-shaped rod 7 drives the U-shaped plate 12 to rotate, and in the process of rotation of the connecting disc 11, the abutting rod member 13 slides along the track of the arc surface 18 on the outer wall of the connecting disc 11 (that is, the abutting rod member 13 slides from the part with the smallest radius of the arc surface 18 on the connecting disc 11 to the part with the largest radius of the arc surface 18), and under the pushing action of the arc surface 18 on the connecting disc 11, the abutting rod member 13 slides in the through hole towards the end close to the first flange plate 1 (or the second flange plate 5), so that the two ends of the abutting rod member 13 abut against the connecting disc 11 and the first flange plate 1 (or the second flange plate 5) respectively, the abutting rod member 13 positions and abuts against the connecting disc 11, the connecting disc 11 no longer rotates, the eccentric rotation or axial stretching movement of the first bellows 2 (or the second bellows 4) is controlled to a certain extent, the first bellows 2 (or the second bellows 4) is prevented from being excessively stretched axially or excessively rotated eccentrically, the abutting rod member 13 is locked when abutting against the largest radius end of the arc surface 18, the first bellows 2 and the second bellows 4 no longer move, and (2) when the first bellows 2 and the second bellows 4 move axially or the first bellows 2 and the second bellows 4 rotate eccentrically, the first V-shaped rod 6 and the second V-shaped rod 7 rotate around the positioning shaft 8 on the side of the first bellows 2 and the second bellows 4 that is relatively compressed, so that the included angle on the side of the first V-shaped rod 6 and the second V-shaped rod 7 that is close to the first bellows 2 or the second bellows 4 decreases, the first V-shaped rod 6 drives the connecting disc 11 to rotate, the second V-shaped rod 7 drives the U-shaped plate 12 to rotate, and in the process of rotation of the connecting disc 11, the abutting rod member 13 slides along the track of the arc surface 18 on the outer wall of the connecting disc 11 (that is, the abutting rod member 13 slides along the part with the same radius of the arc surface 18 on the connecting disc 11), so that the abutting rod member 13 abuts against the height difference position of the connecting position of the arc surface 18 (that is, the abutting rod member 13 is locked when abutting against the smallest radius end of the arc surface 18, the first bellows 2 and the second bellows 4 no longer move), the abutting rod member 13 positions and abuts against the connecting disc 11, the connecting disc 11 no longer rotates, the eccentric rotation or axial stretching movement of the first bellows 2 (or the second bellows 4) is controlled to a certain extent, and the first bellows 2 (or the second bellows 4) is prevented from being excessively compressed axially or excessively rotated eccentrically.

[0038] Further, the part of the abutting rod 13 between the square plate 14 and the U-shaped plate 12 is provided with a return plate 15, the part of the abutting rod 13 between the return plate 15 and the square plate 14 is annular, the outer wall of the annular part of the abutting rod 13 between the return plate 15 and the square plate 14 is sleeved with a first elastic element 16, and the two ends of the first elastic element 16 are connected to the return plate 15 and the square plate 14 respectively. Specifically, when the first bellows 2 and the second bellows 4 are axially stretched and moved or eccentrically rotated, the relative stretching side of the first bellows 2 and the second bellows 4, the first V-shaped rod 6 and the second V-shaped rod 7 rotate around the positioning shaft 8, the included angle of the side between the first V-shaped rod 6 and the second V-shaped rod 7 close to the first bellows 2 or the second bellows 4 increases, the first V-shaped rod 6 drives the connecting disc 11 to rotate, under the pushing action of the arc surface 18 on the connecting disc 11, in the process of sliding of the abutting rod 13 in the through hole towards the end close to the first flange plate 1 (or the second flange plate 5), since the part of the abutting rod 13 between the return plate 15 and the square plate 14 is annular, the first elastic element 16 (the first elastic element 16 is an element capable of elastic return, preferably a spring) is compressed under the pushing of the return plate 15, so that the first elastic element 16 is in a compressed state, when the first bellows 2 and the second bellows 4 are axially stretched and moved or eccentrically rotated to the maximum value and then rotated back, under the elastic return of the first elastic element 16, the abutting rod 13 slides away from the first flange plate 1 (or the second flange plate 5), one end of the abutting rod 13 abuts against the outer wall of the connecting disc 11, the other end of the abutting rod 13 is separated from the outer wall of the first flange plate 1 (or the second flange plate 5), so that the abutting rod 13 releases the positioning operation on the connecting disc 11, the first V-shaped rod 6 (or the second V-shaped rod 7).

[0039] Preferably, the auxiliary mechanism further comprises a positioning disc 17, the second V-shaped rod 7 and the flat plate 9 are connected in a rotating manner through an auxiliary shaft 10, the auxiliary shaft 10 and the second V-shaped rod 7 are fixedly connected, one end of the auxiliary shaft 10 close to the abutting rod 13 penetrates through the flat plate 9 and is provided with the positioning disc 17, the positioning of the auxiliary shaft 10 and the second V-shaped rod 7 is realized by positioning the positioning disc 17, specifically, when the abutting rod 13 positions the connecting disc 11 and the first V-shaped rod 6 (or the second V-shaped rod 7), the positioning of the abutting rod 13 on the connecting disc 11 and the first V-shaped rod 6 (or the second V-shaped rod 7) may be unstable, at this time, the positioning disc 17 is positioned, the connecting disc 11 and the first V-shaped rod 6 (or the second V-shaped rod 7) are positioned again (see the following text for details), to prevent the first bellows 2 (or the second bellows 4) from moving excessively axially or rotating excessively eccentrically.

[0040] Preferably, the auxiliary mechanism further comprises an arc panel 19, the top end side wall of the flat plate 9 through which the auxiliary shaft 10 penetrates is provided with the arc panel 19, a through hole is formed in the arc panel 19, and a limiting rod 20 is installed in the through hole in a sliding fit mode, the outer wall of the positioning disc 17 is uniformly provided with a plurality of clamping teeth, and the limiting rod 20 and the clamping teeth are used in cooperation, specifically, when the abutting rod member 13 performs the positioning operation on the connecting disc 11 and the first V-shaped rod 6 (or the second V-shaped rod 7), the abutting rod member 13 can be unstable in positioning the connecting disc 11 and the first V-shaped rod 6 (or the second V-shaped rod 7), at this time, the limiting rod 20 is driven to slide to one end of the positioning disc 17 (detailed later), so that the limiting rod 20 abuts between the clamping teeth on the positioning disc 17, so that the limiting rod 20 performs the positioning operation on the positioning disc 17, and performs the secondary positioning operation on the connecting disc 11 and the first V-shaped rod 6 (or the second V-shaped rod 7), thereby preventing the first bellows 2 (or the second bellows 4) from moving excessively in the axial direction or rotating excessively eccentrically.

[0041] Further, the outer wall of each limiting rod 20 is symmetrically provided with two reset plates 21, the reset plates 21 and the arc panel 19 are connected through a second elastic element 22, the outer wall of each abutting rod member 13 is symmetrically provided with two extrusion plates 23, and the end of the limiting rod 20 abuts against the extrusion plate 23, specifically, under the elastic force of the second elastic element 22 (the second elastic element 22 is an element capable of elastic reset, and is preferably a spring), the second elastic element 22 drives the limiting rod 20 and the extrusion plate 23 to abut against each other through the reset plate 21, when the abutting rod member 13 slides in the through hole to the end close to the first flange plate 1 (or the second flange plate 5), the abutting rod member 13 drives the extrusion plate 23 to slide to the end close to the first flange plate 1 (or the second flange plate 5), so that the extrusion plate 23 performs the extrusion operation on the limiting rod 20, so that the limiting rod 20 abuts between the clamping teeth on the positioning disc 17, so that the limiting rod 20 performs the positioning operation on the positioning disc 17, so that the second elastic element 22 is in a compressed state, when the first bellows 2 and the second bellows 4 are axially stretched and moved or eccentrically rotated to the maximum value and then rotated back, under the rebound of the first elastic element 16, the abutting rod member 13 slides to the end away from the first flange plate 1 (or the second flange plate 5), the abutting rod member 13 drives the extrusion plate 23 to slide to the end away from the first flange plate 1 (or the second flange plate 5), and under the rebound of the second elastic element 22, the limiting rod 20 and the positioning disc 17 are separated from each other, so that the limiting rod 20 releases the positioning operation on the positioning disc 17, the connecting disc 11 and the first V-shaped rod 6 (or the second V-shaped rod 7), through the reciprocating movement of the abutting rod member 13 and the limiting rod 20, the positioning and release positioning operation on the connecting disc 11 and the first V-shaped rod 6 (or the second V-shaped rod 7) can be realized, thereby preventing the first bellows 2 (or the second bellows 4) from moving excessively in the axial direction or rotating excessively eccentrically.

[0042] In still another embodiment of the present application, the U-shaped plate 12 is provided with a positioning mechanism for assisting the rotational connection of the connecting plate 11 and the U-shaped plate 12, which comprises a driving rod 24. An annular groove 25 is formed on the U-shaped plate 12, and two driving grooves 26 are symmetrically formed outside the annular groove 25 on the same U-shaped plate 12, and the driving grooves 26 are in communication with the annular groove 25. An auxiliary ring 27 is slidably installed in the annular groove 25, and the auxiliary ring 27 and the inner wall of the annular groove 25 are connected by a plurality of third elastic members 28. Two circular grooves 29 are symmetrically formed on the outer wall of the connecting plate 11, and the auxiliary ring 27 and the circular grooves 29 are mutually inserted and fitted. One driving rod 24 is slidably installed in each driving groove 26, and the driving rod 24 and the inner wall of the driving groove 26 are connected by a fourth elastic member 30. A clamping groove 31 is formed on each driving rod 24, and the groove wall of the clamping groove 31 away from the connecting plate 11 is beveled. A clamping rod 32 is slidably installed in the driving groove 26, and the driving rod 24 penetrates through the clamping rod 32 and is combined into a cross rod. The clamping rod 32 and the inner wall of the driving groove 26 are connected by a fifth elastic member 33. The clamping rod 32 abuts against the outer wall of the auxiliary ring 27 to position the auxiliary ring 27. A V-shaped arc groove 34 is formed on the side wall of the connecting plate 11, and the driving rod 24 abuts against the bottom end of the V-shaped arc groove 34. Specifically, during the rotation of the connecting plate 11, the driving rod 24 abuts against the V-shaped arc groove 34 (for example, the V-shaped arc groove 34 is a V-shaped arc groove with a radius of 10 mm and a depth of 5 mm, and the driving rod 24 is a driving rod with a radius of 10 mm and a length of 20 mm), and the driving rod 24 is driven to rotate around the V-shaped arc groove 34, thereby assisting the rotation of the connecting plate 11. Figure 10In the process of the trajectory sliding (that is, the process of the active rod 24 sliding from the bottom end of the V-shaped camber groove 34 to the top end of the V-shaped camber groove 34), the connecting disc 11 drives the active rod 24 to slide to the inner end of the active groove 26, the active rod 24 extrudes the fourth elastic member 30 (the fourth elastic member 30 is an element capable of elastic return, preferably a spring), so that the fourth elastic member 30 is in a compressed state, in the process of the active rod 24 sliding to the inner end of the active groove 26, when the clamping rod 32 slides to the position of the clamping groove 31 on the active rod 24, under the pulling action of the fifth elastic member 33 (the fifth elastic member 33 is an element capable of elastic return, preferably a spring), (since the fifth elastic member 33 is in a stretched state at the initial time, and the clamping rod 32 is positioned on the auxiliary ring 27 at the initial position due to the abutting of the active rod 24 on the clamping rod 32), the clamping rod 32 slides into the clamping groove 31 on the active rod 24, so that the clamping rod 32 releases the positioning of the auxiliary ring 27, the auxiliary ring 27 slides to the end close to the connecting disc 11 under the rebounding action of the third elastic member 28 (the third elastic member 28 is an element capable of elastic return, preferably a spring) (since the third elastic member 28 is in a compressed state at the initial position, and the third elastic member 28 can be in a compressed state at the initial position due to the positioning of the auxiliary ring 27 by the clamping rod 32, after the positioning of the auxiliary ring 27 by the clamping rod 32 is released, the third elastic member 28 can rebound and drive the auxiliary ring 27 to slide to the end close to the connecting disc 11), so that the auxiliary ring 27 slides into the circular ring groove 29 on the connecting disc 11, so that the auxiliary ring 27 and the connecting disc 11 are connected, through the secondary connection of the connecting disc 11 and the U-shaped plate 12 by the auxiliary ring 27, the breakage of the positioning shaft 8 under a relatively large force is prevented, the auxiliary rotating connection of the connecting disc 11 and the U-shaped plate 12 is achieved, and the stability of the rotation of the connecting disc 11 and the U-shaped plate 12 is ensured, in the embodiment, the state of the active rod 24 sliding to the top end of the V-shaped camber groove 34 is an extreme deformation condition, and the state of the auxiliary ring 27 sliding into the circular ring groove 29 on the connecting disc 11 is extremely rare and is a protective measure for the connection of the connecting disc 11 and the U-shaped plate 12.

[0043] Further, an armor ring 35 is arranged outside each wave trough of the first bellows 2 and the second bellows 4, specifically, the cross-sectional shape of the armor ring 35 can be various, preferably a circular cross-section, the purpose is to increase the strength, and at the same time to adapt to the large deformation of the local bellows, the wave shape of the bellows is between "U" type and "S" type, specifically a slight "S" wave shape is adopted, if a "U" type wave shape is adopted, the elasticity of the bellows is relatively poor, and deformation is easy to occur, if the amplitude of the "S" wave shape is too large, the adjacent pipe walls are easy to collide, and the deformation amount is affected. The slight "S" wave shape of the present application has good elasticity, and can adapt to the local deformation of the bellows.

[0044] The foregoing merely illustrates some exemplary embodiments of the application, and no doubt numerous modifications and alterations thereto will be apparent to those skilled in the art. Accordingly, the above description is intended for purposes of illustration only and should not be construed as limiting the scope of the application.

Claims

1. A swing hose comprising, in sequence, a first flange, a first bellows, a transition flange, a second bellows, and a second flange, characterized in that: The first flange plate and the transition flange plate are connected through a plurality of auxiliary mechanisms, the transition flange plate is provided with a first connecting rod at two end faces in a rotating fit mode, and the first flange plate and the second flange plate are provided with a second connecting rod at end faces in a rotating fit mode; the first connecting rod and the second connecting rod are connected through a positioning shaft in a rotating fit mode. The auxiliary mechanism further comprises a flat plate and an auxiliary shaft, the first connecting rod and the second connecting rod are both V-shaped, the first connecting rod is a first V-shaped rod, and the second connecting rod is a second V-shaped rod; four flat plates are arranged on each of the two end faces of the transition flange plate, one end face of the first flange plate and one end face of the second flange plate, two flat plates on the same end face form a group, an auxiliary shaft is arranged between the flat plates in a group, the opening part of the first V-shaped rod and the second V-shaped rod is connected to the auxiliary shaft in a rotating fit mode, the connecting end of the first V-shaped rod is provided with a connecting disc, the connecting end of the second V-shaped rod is provided with a U-shaped plate, a positioning shaft is arranged between the two inner walls of the U-shaped plate, and the connecting disc is connected to the positioning shaft in a rotating fit mode. The auxiliary mechanism further comprises a pressing rod, the middle part of the two branches of the opening part of the second V-shaped rod is connected through a square plate, a through hole is formed in the middle part of the square plate and the middle part of the U-shaped plate, a pressing rod is arranged in the through hole in a sliding fit mode, and one end of the pressing rod is pressed against the outer wall of the connecting disc. The outer wall of the connecting disc is an arc surface with gradually increasing radii, and the connecting position of the two arc surfaces has a certain height difference. The part of the pressing rod between the square plate and the U-shaped plate is provided with a return plate, the part of the pressing rod between the return plate and the square plate is circular, a first elastic element is sleeved on the outer wall of the circular part of the pressing rod between the return plate and the square plate, and the two ends of the first elastic element are connected to the return plate and the square plate, respectively.

2. A swing hose according to claim 1, characterized in that: The auxiliary mechanism further comprises a positioning disc, the second V-shaped rod and the flat plate are connected through a limiting shaft in a rotating fit mode, one end of the limiting shaft close to the pressing rod penetrates the flat plate and is provided with a positioning disc, and the positioning of the positioning disc achieves the positioning of the limiting shaft and the second V-shaped rod.

3. A swing hose according to claim 2, characterised in that: The auxiliary mechanism further comprises an arc plate, the top side wall of the flat plate penetrated by the limiting shaft is provided with an arc plate, a through hole is formed in the arc plate, a limiting rod is arranged in the through hole in a sliding fit mode, the outer wall of the positioning disc is uniformly provided with a plurality of clamping teeth, and the limiting rod and the clamping teeth are used in cooperation.

4. A swing hose according to claim 3, characterised in that: Two return plates are symmetrically arranged on the outer wall of each limiting rod, the return plate and the arc plate are connected through a second elastic element, two extrusion plates are symmetrically arranged on the outer wall of each pressing rod, and the end part of the extrusion plate abuts against the limiting rod.

5. A swing hose according to claim 1, characterized in that: A positioning mechanism is arranged on the U-shaped plate, and the positioning mechanism is used for assisting the rotating connection of the connecting disc and the U-shaped plate.

6. A swing hose according to claim 1, characterized in that: An armor ring is arranged outside the wave trough of each wave of the first bellows and the second bellows.

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