Spray pump mechanism capable of improving reversing efficiency

Abstract

The invention provides a spray pump mechanism capable of improving reversing efficiency, and relates to the field of ship propulsion. The spray pump mechanism capable of improving the reversing efficiency comprises a propelling structure, a flow direction guiding structure, a reversing driving structure, an upper redirection plate structure, a lower redirection plate structure and a bevel connecting rod structure. When the upper redirection plate structure and the lower redirection plate structure are opened, the upper redirection plate structure can seal a backward channel in the flow direction guiding structure, and the two sides of the upper redirection plate structure are attached to the inner walls of the two sides of the flow direction guiding structure. The upper redirection plate structure and the lower redirection plate structure are driven by the lower end of the output end of the reversing driving structure to move in the direction close to the propelling structure, and the distance between the propelling structure and the upper redirection plate structure and the distance between the propelling structure and the lower redirection plate structure are shortened. The power loss caused by the fact that high-pressure water flow generated by the propelling structure flows to the upper redirection plate structure and the lower redirection plate structure and then is redirected is reduced, and the reversing efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of ship propulsion technology, in particular, to a jet pump mechanism for improving the efficiency of reversing. BACKGROUND

[0002] The jet pump, also known as a water jet propulsion pump, is a device that uses high-speed jet flow to generate a reaction force to propel a ship or underwater equipment. The water jet propulsion pump pressurizes the water flow through the impeller (pump) rotating at high speed, and the high-pressure water flow is sprayed backward at high speed through the nozzle. According to Newton's third law (reaction force), a forward thrust is generated. By adjusting the direction of the nozzle or the guide vane, the direction of the thrust can be changed to achieve ship steering.

[0003] In related technology, the water jet propulsion pump reversing is controlled by two water baffles hinged at the lower end of the steering seat. When deceleration is needed, the reversing cylinder promotes the rotation of the top of the drive rod. Since the middle of the two sides of the drive rod is rotationally connected to the steering seat, the rotation of the top of the drive rod will promote the rotation of the lower end of the drive rod, thereby driving the upper water baffle to rotate upward and the lower water baffle to rotate downward, so as to promote the water flow in the water guide channel to enter the steering seat and be blocked by the upper water baffle, and be discharged in the opposite direction under the guidance of the lower water baffle, thereby achieving the deceleration or reverse of the ship body. However, in this way, the positions of the two water baffles are fixed, and in order to facilitate the upper water baffle to block the steering seat, the upper water baffle needs to be arranged with a space for turning over, which causes the upper water baffle and the lower water baffle to be far away from the impeller. The high-pressure water flow generated by the impeller passes through the upper water baffle and the lower water baffle and then changes direction, resulting in a large power loss. Therefore, how to reduce the distance between the upper water baffle and the impeller to reduce the power loss of the high-pressure water flow generated by the impeller passing through the upper water baffle and the lower water baffle and then changing direction has become a technical problem to be solved. SUMMARY

[0004] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a jet pump mechanism for improving the efficiency of reversing, which shortens the distance between the propulsion structure and the upper and lower redirection plate structures, reduces the power loss of the high-pressure water flow generated by the propulsion structure passing through the upper and lower redirection plate structures and then changing direction, and improves the efficiency of reversing.

[0005] The jet pump mechanism for improving the efficiency of reversing according to the embodiments of the present application comprises a propulsion structure, a flow direction guiding structure, a reversing driving structure, an upper redirection plate structure, a lower redirection plate structure, and a folded angle connecting rod structure.

[0006] The flow direction guiding structure is hinged to the rear end of the propelling structure; the driving end of the reverse driving structure is arranged on the upper side of the flow direction guiding structure, the output end of the reverse driving structure is straddled on the outside of the rear end of the flow direction guiding structure, the middle part of the output end of the reverse driving structure is hinged to the flow direction guiding structure; the upper turning plate structure is fixedly connected to the lower end of the output end of the reverse driving structure, when the upper turning plate structure and the lower turning plate structure are closed, the upper turning plate structure can seal the lower side of the flow direction guiding structure, when the upper turning plate structure and the lower turning plate structure are opened, the upper turning plate structure can seal the backward channel in the flow direction guiding structure, the two sides of the upper turning plate structure are attached to the inner walls of the two sides of the flow direction guiding structure; the rear end of the lower turning plate structure is hinged between the lower end of the output end of the reverse driving structure and the upper turning plate structure, the two sides of the lower turning plate structure are attached to the outer walls of the two sides of the flow direction guiding structure, and the two sides of the lower turning plate structure seal the two sides of the flow direction guiding structure; the fixed end of the folding angle connecting rod structure is fixed to the outside of the lower turning plate structure, the end of the fixed end of the folding angle connecting rod structure is hinged to the lower end of the output end of the reverse driving structure, the other end of the folding angle connecting rod structure is hinged to the flow direction guiding structure.

[0007] According to some embodiments of the present application, the propelling structure comprises a jet pump, a U-shaped reinforcing seat and a hinged seat, the U-shaped reinforcing seat is arranged on the upper and lower sides of the rear end of the jet pump respectively, the hinged seat is fixedly connected to the tail end of the U-shaped reinforcing seat, and the upper and lower sides of the front end of the flow direction guiding structure are hinged to the hinged seat.

[0008] According to some embodiments of the present application, the flow direction guiding structure comprises a connecting cylinder, a guiding cylinder and a turning oil cylinder, the upper and lower sides of the front end of the connecting cylinder are hinged to the rear end of the propelling structure, the water flow jetted by the propelling structure is directed to the connecting cylinder, the guiding cylinder is fixedly connected to the rear end of the connecting cylinder, the lower side of the guiding cylinder is open, a transition groove is arranged on the lower side opening of the guiding cylinder, the upper turning plate structure can swing forward along the transition groove, when the upper turning plate structure and the lower turning plate structure are closed, the upper turning plate structure can seal the lower side opening of the guiding cylinder, when the upper turning plate structure and the lower turning plate structure are opened, the upper turning plate structure seals the backward channel in the guiding cylinder, the two sides of the lower turning plate structure seal the transition groove, and the output end of the turning oil cylinder is hinged to the upper side of the connecting cylinder, and the turning oil cylinder can drive the connecting cylinder to swing left and right.

[0009] According to some embodiments of the present application, the flow direction guiding structure further comprises a steering hinge shaft, a reverse oil cylinder seat, a steering connecting shaft, a connecting rod base and a reinforcing plate, the steering hinge shaft is fixedly inserted into the upper end and the lower end of the connecting cylinder, the upper side and the lower side of the rear end of the propulsion structure are respectively rotationally connected to the steering hinge shaft, the reverse oil cylinder seat is fixedly connected to the outer wall of the upper side of the guiding cylinder, the driving end of the reverse driving structure is hingedly connected to the reverse oil cylinder seat, the steering connecting shaft is fixedly inserted into the connecting cylinder, the output end of the steering oil cylinder is rotationally connected to the steering connecting shaft, the connecting rod base is fixedly connected to the outer wall of the rear end of the connecting cylinder, one end of the angle connecting rod structure is hingedly connected to the connecting rod base, the reinforcing plates are respectively arranged in the middle part of the outer walls of the two sides of the guiding cylinder, and the middle part of the output end of the reverse driving structure is hingedly connected to the reinforcing plates and the guiding cylinder.

[0010] According to some embodiments of the present application, the connecting cylinder comprises outer turning side plates, connecting plates and reinforcing limiting plates, the two outer turning side plates are arranged, the upper end and the lower end of the two outer turning side plates are fixedly connected through the two connecting plates, the two outer turning side plates form a horn with a large front opening and a small rear opening, the water flow sprayed by the propulsion structure is directed to the large opening of the horn, the reinforcing limiting plates are fixedly connected between the two connecting plates of the upper end of the outer turning side plates, the reinforcing limiting plates are located on the two sides of the hinge connection of the propulsion structure, and the propulsion structure is blocked by the reinforcing limiting plates, so that the left and right turning of the connecting cylinder is limited.

[0011] According to some embodiments of the present application, the reverse driving structure comprises a rotating frame and a reverse oil cylinder, the reverse oil cylinder is the driving end of the reverse driving structure, the rotating frame is the output end of the reverse driving structure, the reverse oil cylinder is hingedly connected to the upper side of the flow direction guiding structure, the output end of the reverse oil cylinder is hingedly connected to the top end of the rotating frame, the rotating frame straddles the outer side of the rear end of the flow direction guiding structure, the middle part of the rotating frame is hingedly connected to the two sides of the flow direction guiding structure, the upper redirecting plate structure is fixedly connected to the inner part of the lower end of the rotating frame, and the two sides of the lower redirecting plate structure are respectively hingedly connected between the rotating frame and the upper redirecting plate structure.

[0012] According to some embodiments of the present application, the rotating frame comprises a gate-shaped frame body, a turnover pin shaft, a hinged pin shaft and a cylinder pushing seat, the turnover pin shaft is fixedly inserted into the left and right sides of the middle part of the gate-shaped frame body, the turnover pin shaft is respectively hinged to the two sides of the flow direction guiding structure, the upper turning plate structure is fixedly connected to the inside of the lower end of the gate-shaped frame body, the hinged pin shaft is provided in two, the two hinged pin shafts are respectively fixedly inserted between the inside wall of the lower end of the gate-shaped frame body and the outside wall of the upper turning plate structure, the rear end of the lower turning plate structure is hinged between the inside wall of the lower end of the gate-shaped frame body and the outside wall of the upper turning plate structure through the hinged pin shaft, the cylinder pushing seat is fixedly connected to the top end of the gate-shaped frame body, and the output end of the reversing cylinder is hinged to the cylinder pushing seat.

[0013] According to some embodiments of the present application, the upper turning plate structure comprises an upper arc-shaped baffle, upper side sealing plates, upper guide plates and a fixed plate, the upper side sealing plates are respectively fixedly connected to the two sides of the upper arc-shaped baffle, the upper guide plates are equally spaced between the inside of the upper arc-shaped baffle and the two upper side sealing plates, and the fixed plate is fixedly connected to the outside of the upper side sealing plates, the rear end of the upper arc-shaped baffle and the fixed plate are both fixedly connected to the lower end of the output end of the reversing driving structure, and the rear end of the lower turning plate structure is hinged between the rear end of the upper side sealing plate and the lower end of the output end of the reversing driving structure.

[0014] According to some embodiments of the present application, the lower turning plate structure comprises a lower arc-shaped baffle, lower side sealing plates and lower guide plates, the lower side sealing plates are respectively fixedly connected to the two sides of the lower arc-shaped baffle, the lower guide plates are equally spaced between the inside of the lower arc-shaped baffle and the two lower side sealing plates, and the rear end of the lower side sealing plate is hinged between the lower end of the output end of the reversing driving structure and the upper turning plate structure, and the lower side sealing plate seals the two sides of the flow direction guiding structure.

[0015] According to some embodiments of the present application, the folding angle connecting rod structure comprises a reinforcing connecting rod, a movable connecting rod, a connecting pin shaft and a fixed pin shaft, the reinforcing connecting rod is fixedly connected to the outside of the lower side sealing plate, the rear end of the lower side sealing plate and the tail end of the reinforcing connecting rod are hinged between the lower end of the output end of the reversing driving structure and the upper turning plate structure, one end of the movable connecting rod is hinged to the front end of the reinforcing connecting rod through the connecting pin shaft, the other end of the movable connecting rod is hinged to the flow direction guiding structure through the fixed pin shaft, the hinged point of the movable connecting rod and the reinforcing connecting rod is lower than the other hinged point of the movable connecting rod and the reinforcing connecting rod, so that the movable connecting rod and the reinforcing connecting rod form a V-shaped folding angle.

[0016] The beneficial effects of the present application are as follows: when the spray pump mechanism is decelerating or reversing, the driving end of the reversing driving structure pushes the middle part of the output end of the reversing driving structure to rotate around the outer side of the rear end of the flow direction guiding structure, and the lower end of the output end of the reversing driving structure drives the upper redirecting plate structure to move forward and flip upward at the same time, so that the upper redirecting plate structure seals the backward channel inside the flow direction guiding structure, and the lower end of the output end of the reversing driving structure drives the lower redirecting plate structure to move forward. At the same time, the lower end of the output end of the reversing driving structure drives the lower redirecting plate structure to flip downward through the angle connecting rod structure, so that The upper redirecting plate structure and the lower redirecting plate structure are unfolded, and the inner sides of the upper redirecting plate structure and the lower redirecting plate structure guide the change in the flow direction of the high-pressure water flow, thereby realizing the change in the thrust direction, and further realizing the functions of deceleration and reversing. The upper redirecting plate structure and the lower redirecting plate structure are driven by the lower end of the output end of the reversing drive structure to move downward in the direction close to the propulsion structure, shortening the distance from the propulsion structure to the upper redirecting plate structure and the lower redirecting plate structure, reducing the power loss of the high-pressure water flow generated by the propulsion structure flowing to the upper redirecting plate structure and the lower redirecting plate structure and then being redirected, thereby improving the efficiency of reversing.

[0017] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 3D schematic diagram of the structure of the spray pump mechanism for improving reverse efficiency according to an embodiment of the present application in the forward position; Figure 2 1 is a schematic diagram of the three-dimensional structure of a spray pump mechanism for improving reversing efficiency in a reversing state according to an embodiment of the present application; Figure 3 is a schematic diagram of the three-dimensional structure of a propulsion structure according to an embodiment of the present application; Figure 4 is a schematic diagram of the three-dimensional structure of the flow direction guiding structure according to an embodiment of the present application; Figure 5 According to the embodiment of this application Figure 4 A schematic diagram of the magnified three-dimensional structure in the middle; Figure 6 1 is a schematic diagram of the three-dimensional structure of the reverse driving structure, the upper redirecting plate structure, the lower redirecting plate structure and the angle connecting rod structure according to an embodiment of the present application in the forward position; Figure 7 is a three-dimensional structural schematic diagram of the reverse driving structure, the upper deflection plate structure, the lower deflection plate structure and the angle link structure according to the embodiment of the present application in a reverse state; Figure 8 is a three-dimensional structural schematic diagram of the reverse driving structure and the upper deflection plate structure according to the embodiment of the present application from a first perspective; Figure 9 is a three-dimensional structural schematic diagram of the reverse driving structure and the upper deflection plate structure according to the embodiment of the present application from a second perspective; Figure 10 is a three-dimensional structural schematic diagram of the lower deflection plate structure and the angle link structure according to the embodiment of the present application.

[0020] Figure: 100 - propulsion structure; 110 - jet pump; 120 - U-shaped reinforcing seat; 130 - hinged seat; 200 - flow direction guiding structure; 210 - connecting cylinder; 211 - everted side plate; 212 - connecting plate; 213 - reinforcing limiting plate; 220 - guiding cylinder; 230 - transition groove; 240 - steering oil cylinder; 250 - steering hinged shaft; 260 - reverse oil cylinder seat; 270 - steering connecting shaft; 280 - link base; 290 - reinforcing plate; 300 - reverse driving structure; 310 - rotating frame; 311 - door-shaped frame body; 312 - everted pin shaft; 313 - hinged pin shaft; 314 - oil cylinder propulsion seat; 320 - reverse oil cylinder; 400 - upper deflection plate structure; 410 - upper arched baffle; 420 - upper side sealing plate; 430 - upper flow guide plate; 440 - fixed plate; 500 - lower deflection plate structure; 510 - lower arched baffle; 520 - lower side sealing plate; 530 - lower flow guide plate; 600 - angle link structure; 610 - reinforcing link; 620 - movable link; 630 - connecting pin shaft; 640 - fixed pin shaft. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

[0022] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0023] The jet pump mechanism for improving reverse efficiency according to the embodiments of the present application will be described below with reference to the drawings.

[0024] Please refer to Figures 1 to 10The improved reverse driving efficiency jet pump mechanism according to the embodiment of the application comprises a propelling structure 100, a flow direction guiding structure 200, a reverse driving structure 300, an upper deflection plate structure 400, a lower deflection plate structure 500 and a folded corner connecting rod structure 600.

[0025] Please refer to Figures 1 to 2The flow direction guiding structure 200 is hinged at the rear end of the propelling structure 100; the driving end of the reverse driving structure 300 is arranged on the upper side of the flow direction guiding structure 200, the output end of the reverse driving structure 300 is straddled outside the rear end of the flow direction guiding structure 200, the middle part of the output end of the reverse driving structure 300 is hinged to the flow direction guiding structure 200; the upper turning plate structure 400 is fixedly connected to the lower end of the output end of the reverse driving structure 300, when the upper turning plate structure 400 and the lower turning plate structure 500 are closed, the upper turning plate structure 400 can seal the lower side of the flow direction guiding structure 200, when the upper turning plate structure 400 and the lower turning plate structure 500 are opened, the upper turning plate structure 400 can seal the backward channel inside the flow direction guiding structure 200, the two sides of the upper turning plate structure 400 are attached to the inner walls of the two sides of the flow direction guiding structure 200; the rear end of the lower turning plate structure 500 is hinged between the lower end of the output end of the reverse driving structure 300 and the upper turning plate structure 400, the two sides of the lower turning plate structure 500 are attached to the outer walls of the two sides of the flow direction guiding structure 200, and the two sides of the lower turning plate structure 500 seal the two sides of the flow direction guiding structure 200; the fixed end of the folding angle connecting rod structure 600 is fixed to the outer side of the lower turning plate structure 500, the end of the fixed end of the folding angle connecting rod structure 600 is hinged to the lower end of the output end of the reverse driving structure 300, the other end of the folding angle connecting rod structure 600 is hinged to the flow direction guiding structure 200.When the jet pump mechanism is in forward driving, the upper deflector structure 400 and the lower deflector structure 500 are folded, the upper deflector structure 400 seals the lower side of the flow guiding structure 200, the water flow channel inside the flow guiding structure 200 is opened, the impeller of the propulsion structure 100 rotates at high speed to pressurize the water flow, the high-pressure water flow is guided to be sprayed through the water flow channel, and according to Newton's third law, the reaction force generates a forward thrust; when the jet pump mechanism is in deceleration or reverse driving, the middle part of the output end of the reverse driving structure 300 is pushed by the driving end of the reverse driving structure 300 to rotate around the outside of the rear end of the flow guiding structure 200, the lower end of the output end of the reverse driving structure 300 drives the upper deflector structure 400 to move forward while turning upward, so that the upper deflector structure 400 seals the backward channel inside the flow guiding structure 200, the lower end of the output end of the reverse driving structure 300 drives the lower deflector structure 500 to move forward, at the same time, the lower end of the output end of the reverse driving structure 300 drives the lower deflector structure 500 to turn downward through the angle link structure 600, so that the upper deflector structure 400 and the lower deflector structure 500 are unfolded, the flow direction of the high-pressure water flow inside the upper deflector structure 400 and the lower deflector structure 500 is changed, the direction of the thrust is changed, and the functions of deceleration and reverse driving are realized, and the upper deflector structure 400 and the lower deflector structure 500 are driven by the lower end of the output end of the reverse driving structure 300 to move towards the propulsion structure 100, so that the distance between the propulsion structure 100 and the upper deflector structure 400 and the lower deflector structure 500 is shortened, the power loss of the high-pressure water flow generated by the propulsion structure 100 flowing to the upper deflector structure 400 and the lower deflector structure 500 and then being redirected is reduced, and the efficiency of reverse driving is improved.

[0026] Please refer to Figures 1 to 3 The propulsion structure 100 includes a jet pump 110, a U-shaped reinforcing seat 120, and a hinged seat 130, the U-shaped reinforcing seat 120 is arranged on the upper and lower sides of the rear end of the jet pump 110 respectively, the hinged seat 130 is fixedly connected to the tail end of the U-shaped reinforcing seat 120, and the upper and lower sides of the front end of the flow guiding structure 200 are hinged to the hinged seat 130. The U-shaped reinforcing seat 120 enhances the strength of the jet pump 110 at the support of the flow guiding structure 200, and the hinged seat 130 is used to connect the flow guiding structure 200 by hinging, so that the flow guiding structure 200 can swing left and right to control the left and right turning of the ship.

[0027] Please refer to Figures 1 to 4The flow direction guiding structure 200 comprises a connecting cylinder 210, a guiding cylinder 220 and a steering cylinder 240. The upper and lower sides of the front end of the connecting cylinder 210 are hinged to the rear end of the propulsion structure 100, and the water flow sprayed by the propulsion structure 100 is directed towards the connecting cylinder 210. The guiding cylinder 220 is fixedly connected to the rear end of the connecting cylinder 210, and the lower side of the guiding cylinder 220 is provided with a transition groove 230. The upper deflection plate structure 400 can swing forward along the transition groove 230. When the upper deflection plate structure 400 and the lower deflection plate structure 500 are folded, the upper deflection plate structure 400 can seal the lower side opening of the guiding cylinder 220. When the upper deflection plate structure 400 and the lower deflection plate structure 500 are unfolded, the upper deflection plate structure 400 seals the rear passage in the guiding cylinder 220, and the lower deflection plate structure 500 seals the transition groove 230 on both sides. The output end of the steering cylinder 240 is hinged to the upper side of the connecting cylinder 210, and the steering cylinder 240 can drive the connecting cylinder 210 to swing left and right. The upper and lower sides of the front end of the connecting cylinder 210 are respectively hinged to the hinge seat 130, and the water flow sprayed by the spray pump 110 is directed towards the connecting cylinder 210. When the ship is forwardly accelerated, the upper deflection plate structure 400 seals the lower side opening of the guiding cylinder 220, and the water flow sprayed by the spray pump 110 is sprayed rearward through the connecting cylinder 210 and the guiding cylinder 220. The steering cylinder 240 drives the connecting cylinder 210 to swing left and right, changes the direction of the connecting cylinder 210 and the guiding cylinder 220, and then guides the water flow sprayed by the spray pump 110 to flow in a certain direction, so as to realize the left and right steering of the ship. When the ship is decelerated or reversed, the upper deflection plate structure 400 and the lower deflection plate structure 500 are unfolded, the upper deflection plate structure 400 seals the rear passage in the guiding cylinder 220, and the upper deflection plate structure 400 and the lower deflection plate structure 500 cooperate with the side wall of the guiding cylinder 220. The water flow sprayed by the spray pump 110 is guided to be sprayed forward in sequence through the upper deflection plate structure 400 and the lower deflection plate structure 500, so as to realize the deceleration and reverse of the ship.

[0028] Please refer to Figures 1 to 4The flow guiding structure 200 further comprises a steering hinged shaft 250, a reverse oil cylinder seat 260, a steering connecting shaft 270, a connecting rod base 280 and a reinforcing plate 290. The steering hinged shaft 250 is fixedly inserted into the upper end and the lower end of the connecting cylinder 210, and the upper side and the lower side of the rear end of the propelling structure 100 are respectively rotatably connected to the steering hinged shaft 250. The reverse oil cylinder seat 260 is fixedly connected to the outer wall of the upper side of the guiding cylinder 220, and the driving end of the reverse driving structure 300 is hingedly connected to the reverse oil cylinder seat 260. The steering connecting shaft 270 is fixedly inserted into the connecting cylinder 210, and the output end of the steering oil cylinder 240 is rotatably connected to the steering connecting shaft 270. The connecting rod base 280 is fixedly connected to the outer wall of the rear end of the connecting cylinder 210, and one end of the angle connecting rod structure 600 is hingedly connected to the connecting rod base 280. The reinforcing plate 290 is arranged at the middle part of the outer wall of the two sides of the guiding cylinder 220, and the middle part of the output end of the reverse driving structure 300 is hingedly connected to the reinforcing plate 290 and the guiding cylinder 220.

[0029] Please refer to Figures 1 to 5The connecting cylinder 210 comprises everted side plates 211, connecting plates 212 and reinforcing limiting plates 213. The two everted side plates 211 are fixedly connected by the two connecting plates 212 between the upper end and the lower end of the two everted side plates 211. The two everted side plates 211 form a horn mouth with a large front and a small back. The water flow sprayed by the propelling structure 100 is directed towards the large mouth of the horn mouth. The reinforcing limiting plates 213 are fixedly connected between the two connecting plates 212 at the upper end of the everted side plates 211. The reinforcing limiting plates 213 are located on both sides of the hinge of the propelling structure 100. The propelling structure 100 is blocked by the reinforcing limiting plates 213, thereby limiting the left and right turning of the connecting cylinder 210. The turning hinge shaft 250 passes through the two connecting plates 212 at the upper end and the lower end of the everted side plates 211. The reinforcing limiting plates 213 are located on both sides of the turning hinge shaft 250. The reinforcing limiting plates 213 can limit the left and right swinging angle of the hinge seat 130, thereby controlling the left and right swinging angle of the connecting cylinder 210. The upper end and the lower end of the everted side plates 211 are connected by the two connecting plates 212, forming a double-layer structure, thereby enhancing the strength of the connection between the connecting cylinder 210 and the turning hinge shaft 250. The reinforcing limiting plates 213 can also enhance the connection strength between the two connecting plates 212 while limiting, thereby facilitating the turning hinge shaft 250 to support the flow guiding structure 200 and its upper accessories, and reducing the insufficient strength of the flow guiding structure 200 in the use process. The two everted side plates 211 form a horn mouth with a large front and a small back, which is used to guide the water flow sprayed by the spray pump 110 to the flow guiding cylinder 220.

[0030] Please refer to Figures 1 to 7, the reverse driving structure 300 includes a rotating frame 310 and a reverse cylinder 320, the reverse cylinder 320 is the driving end of the reverse driving structure 300, the rotating frame 310 is the output end of the reverse driving structure 300, the reverse cylinder 320 is hinged to the upper side of the flow guiding structure 200, the output end of the reverse cylinder 320 is hinged to the top end of the rotating frame 310, the rotating frame 310 straddles the outside of the rear end of the flow guiding structure 200, the middle part of the rotating frame 310 is hinged to the two sides of the flow guiding structure 200, the upper deflection plate structure 400 is fixedly connected to the inside of the lower end of the rotating frame 310, and the two sides of the lower deflection plate structure 500 are respectively hinged between the rotating frame 310 and the upper deflection plate structure 400. The reverse cylinder 320 is hinged to the reverse cylinder seat 260, the output end of the reverse cylinder 320 is hinged to the top end of the rotating frame 310, the rotating frame 310 straddles the outside of the rear end of the guide cylinder 220, and the middle part of the rotating frame 310 is hinged to the tail end of the reinforcing plate 290 and the guide cylinder 220. The reverse cylinder 320 is pushed out, the output end of the reverse cylinder 320 drives the rotating frame 310 to rotate, due to the swing of the rotating frame 310, the bottom end of the rotating frame 310 moves forward and upward, and then the rotating frame 310 drives the upper deflection plate structure 400 to move forward and upward, the upper deflection plate structure 400 blocks the rear passage in the inside of the guide cylinder 220, the upper deflection plate structure 400 drives the lower deflection plate structure 500 to overturn downward through the angle link structure 600, and the lower deflection plate structure 500 moves forward with the upper deflection plate structure 400, the upper deflection plate structure 400 and the lower deflection plate structure 500 are opened to each other, the inner walls of the upper deflection plate structure 400 and the lower deflection plate structure 500 form the arc-shaped channel for flow deflection, the water flow sprayed by the spray pump 110 passes through the connecting cylinder 210 and then passes through the arc-shaped channel for flow deflection, so that the water flow sprayed by the spray pump 110 changes from rear to front, achieving the purpose of reversing and reducing speed, and when the upper deflection plate structure 400 and the lower deflection plate structure 500 are opened to each other, the inner walls of the upper deflection plate structure 400 and the lower deflection plate structure 500 form the arc-shaped channel for flow deflection close to the position of the spray pump 110, so as to reduce the power loss of the high-pressure water flow generated by the spray pump 110 flowing to the upper deflection plate structure 400 and the lower deflection plate structure 500 again after deflection, and improve the efficiency of reversing.

[0031] Please refer to Figures 1 to 8, the rotating frame 310 comprises a door-shaped frame body 311, a turnover pin shaft 312, a hinged pin shaft 313 and a cylinder pushing seat 314, the turnover pin shaft 312 is fixedly inserted into the left and right sides of the middle part of the door-shaped frame body 311, the turnover pin shaft 312 is respectively hinged to the two sides of the flow direction guiding structure 200, the upper turning plate structure 400 is fixedly connected to the inner part of the lower end of the door-shaped frame body 311, the hinged pin shaft 313 is provided as two, the two hinged pin shafts 313 are respectively fixedly inserted between the inner side wall of the lower end of the door-shaped frame body 311 and the outer side wall of the upper turning plate structure 400, the rear end of the lower turning plate structure 500 is hinged between the inner side wall of the lower end of the door-shaped frame body 311 and the outer side wall of the upper turning plate structure 400 through the hinged pin shaft 313, the cylinder pushing seat 314 is fixedly connected to the top end of the door-shaped frame body 311, and the output end of the reversing cylinder 320 is hinged to the cylinder pushing seat 314. The door-shaped frame body 311 straddles the tail end of the guiding cylinder 220, the middle part of the two sides of the door-shaped frame body 311 is hinged to the tail end of the guiding cylinder 220 through the turnover pin shaft 312, specifically, one end of the turnover pin shaft 312 passes through the door-shaped frame body 311, the reinforcing plate 290 and the guiding cylinder 220 in sequence, and the other end of the turnover pin shaft 312 is fixed on the door-shaped frame body 311. The door-shaped frame body 311 is driven to rotate around the turnover pin shaft 312 by the reversing cylinder 320 through the cylinder pushing seat 314. The two sides of the bottom end of the door-shaped frame body 311 are fixedly inserted with the hinged pin shaft 313, the other end of the hinged pin shaft 313 is inserted into the upper turning plate structure 400, the rear end of the lower turning plate structure 500 is hinged between the inner side wall of the lower end of the door-shaped frame body 311 and the outer side wall of the upper turning plate structure 400 through the hinged pin shaft 313, specifically, the rear end of the lower turning plate structure 500 is respectively rotationally connected to the hinged pin shaft 313 on the two sides to form a hinged form. The rear end of the upper turning plate structure 400 and the lower turning plate structure 500 is hinged at the bottom end of the door-shaped frame body 311, the front end of the upper turning plate structure 400 and the lower turning plate structure 500 can be opened, so that the inner walls of the upper turning plate structure 400 and the lower turning plate structure 500 form an arc-shaped channel for flow change.

[0032] Please refer to Figures 1 to 9The upper deflection plate structure 400 comprises an upper arc-shaped baffle 410, upper side sealing plates 420, upper flow guide plates 430 and a fixed plate 440. The upper side sealing plates 420 are respectively fixedly connected to the two sides of the upper arc-shaped baffle 410. The upper flow guide plates 430 are arranged at intervals between the inner side of the upper arc-shaped baffle 410 and the two upper side sealing plates 420. The fixed plate 440 is fixedly connected to the outer side of the upper side sealing plates 420. The rear end of the upper arc-shaped baffle 410 and the fixed plate 440 are both fixedly connected to the lower end of the output end of the reverse driving structure 300. The rear end of the lower deflection plate structure 500 is hingedly connected between the rear end of the upper side sealing plates 420 and the lower end of the output end of the reverse driving structure 300. The upper arc-shaped baffle 410 and the upper side sealing plates 420 form the upper part of the arc-shaped channel for flow deflection. The upper side sealing plates 420 are fixed inside the bottom end of the door-shaped frame body 311 through the fixed plate 440. The hinge pin shaft 313 passes through the door-shaped frame body 311 and the upper side sealing plates 420 in sequence. The hinge pin shaft 313 is supported at both ends by the door-shaped frame body 311 and the upper side sealing plates 420 to form double support points. The hinge pin shaft 313 provides sufficient support strength for the lower deflection plate structure 500.

[0033] Please refer to Figures 1 to 10 The lower deflection plate structure 500 comprises a lower arc-shaped baffle 510, lower side sealing plates 520 and lower flow guide plates 530. The lower side sealing plates 520 are respectively fixedly connected to the two sides of the lower arc-shaped baffle 510. The lower flow guide plates 530 are arranged at intervals between the inner side of the lower arc-shaped baffle 510 and the two lower side sealing plates 520. The rear end of the lower side sealing plates 520 is hingedly connected between the lower end of the output end of the reverse driving structure 300 and the upper deflection plate structure 400. The lower side sealing plates 520 seal the two sides of the flow guiding structure 200. The lower arc-shaped baffle 510 and the lower side sealing plates 520 form the lower part of the arc-shaped channel for flow deflection. The upper side sealing plates 420 and the lower side sealing plates 520 cooperate with the side walls of the guiding cylinder 220 to form the side walls of the arc-shaped channel for flow deflection, thereby reducing the occurrence of the water flow sprayed by the spray pump 110 flowing out from the two sides of the arc-shaped channel and making the water flow sprayed by the spray pump 110 change direction along the inner walls of the upper arc-shaped baffle 410 and the lower arc-shaped baffle 510. The upper flow guide plates 430 and the lower flow guide plates 530 make the water flow sprayed by the spray pump 110 flow more uniformly.

[0034] Please refer to Figures 1 to 10The angle folding link structure 600 comprises a reinforcing link 610, a movable link 620, a connecting pin 630 and a fixed pin 640. The reinforcing link 610 is fixedly connected to the outside of the lower sealing plate 520. The rear end of the lower sealing plate 520 and the tail end of the reinforcing link 610 are hingedly connected between the lower end of the output end of the reversing driving structure 300 and the upper turning plate structure 400. One end of the movable link 620 is hingedly connected to the front end of the reinforcing link 610 through the connecting pin 630. The other end of the movable link 620 is hingedly connected to the flow guiding structure 200 through the fixed pin 640. The hinging point of the movable link 620 and the reinforcing link 610 is lower than the other hinging point of the movable link 620 and the reinforcing link 610, so that the movable link 620 and the reinforcing link 610 form a V-shaped angle. When the bottom end of the door-shaped frame body 311 swings forward, the hinging pin 313 moves forward with the bottom end of the door-shaped frame body 311. The hinging pin 313 drives the V-shaped angle of the reinforcing link 610 and the movable link 620 to be reduced. The connecting pin 630 moves downward, and the reinforcing link 610 is turned downward. The reinforcing link 610 and the movable link 620 form an angle folding link, which further drives the lower arched baffle 510 to be turned downward, so as to open the lower arched baffle 510. At the same time, the reinforcing link 610 can strengthen the strength of the two sides of the lower arched baffle 510, and the tail end of the reinforcing link 610 enhances the strength of the connection between the lower arched baffle 510 and the hinging pin 313.

[0035] Specifically, the working principle of the improved reversing efficiency jet pump mechanism is as follows: when the jet pump mechanism is in forward driving, the output end of the reversing cylinder 320 is retracted. The reversing cylinder 320 pulls the door-shaped frame body 311 to rotate around the turning pin 312 through the cylinder pushing seat 314. The bottom end of the door-shaped frame body 311 swings backward, and the door-shaped frame body 311 drives the upper arched baffle 410 to be flat, so that the upper arched baffle 410 seals the lower opening of the guiding cylinder 220, and the water flow channel in the guiding cylinder 220 is opened. The impeller of the jet pump 110 rotates at high speed to pressurize the water flow. The high-pressure water flow is guided and sprayed through the water flow channel, and according to Newton's third law, the reaction force generates a forward thrust.

[0036] When the pump mechanism is decelerating or reversing, the output end of the reversing oil cylinder 320 pushes out, the reversing oil cylinder 320 pushes the door-shaped frame body 311 to rotate around the turnover pin shaft 312 through the oil cylinder pushing seat 314, the bottom end of the door-shaped frame body 311 swings forward, the bottom end of the door-shaped frame body 311 drives the upper arch-shaped baffle 410 to move forward while turning upward, the upper arch-shaped baffle 410 blocks the rear passage inside the guide cylinder 220, the lower arch-shaped baffle 510 is hinged with the upper arch-shaped baffle 410 and the bottom end of the door-shaped frame body 311 through the hinge pin shaft 313, so that the lower arch-shaped baffle 510 also moves forward with the door-shaped frame body 311, the hinge pin shaft 313 moves forward with the bottom end of the door-shaped frame body 311, the hinge pin shaft 313 drives the V-shaped folding angle of the reinforcing connecting rod 610 and the movable connecting rod 620 to be reduced, the connecting pin shaft 630 moves downward, the reinforcing connecting rod 610 turns downward, the folding angle connecting rod formed by the reinforcing connecting rod 610 and the movable connecting rod 620 is further driven to turn the lower arch-shaped baffle 510 downward, the upper arch-shaped baffle 410 turns forward and upward to open and cooperate with the lower arch-shaped baffle 510 turning forward and downward to open, so as to achieve the purpose of the upper arch-shaped baffle 410 and the lower arch-shaped baffle 510 opening to form an arc-shaped passage for flow modification, the upper side sealing plate 420 and the lower side sealing plate 520 cooperate with the side wall of the guide cylinder 220 to form the side wall of the arc-shaped passage for flow modification, reducing the occurrence of the water flow sprayed by the pump 110 flowing out from both sides of the arc-shaped passage, the water flow sprayed by the pump 110 changes the direction of flow along the arc-shaped inner wall of the upper arch-shaped baffle 410 and the lower arch-shaped baffle 510, so that the water flow sprayed by the pump 110 changes from rear to front, achieving the purpose of reversing and decelerating, and when the upper arch-shaped baffle 410 and the lower arch-shaped baffle 510 open to each other, the door-shaped frame body 311 drives the upper arch-shaped baffle 410 and the lower arch-shaped baffle 510 to move forward, so that the arc-shaped passage for flow modification formed by the inner wall of the upper arch-shaped baffle 410 and the lower arch-shaped baffle 510 is close to the position of the water flow sprayed by the pump 110, thereby reducing the power loss of the high-pressure water flow generated by the pump 110 flowing to the upper arch-shaped baffle 410 and the lower arch-shaped baffle 510 and then being redirected, and improving the efficiency of reversing.

[0037] It should be noted that the specific model and specifications of the steering oil cylinder 240 and the reversing oil cylinder 320 need to be selected and determined according to the actual specifications of the device, and the specific selection calculation method adopts the existing technology in the art, so it will not be described in detail.

[0038] The liquid supply of the steering oil cylinder 240 and the reversing oil cylinder 320 and its principle are clear to those skilled in the art, which will not be described in detail here.

[0039] The above merely provides examples of the present application, and is not intended to limit the protection scope of the present application. For those skilled in the art, the present application can have various modifications and changes. Any modified, equivalent replaced, improved, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings, thus, once an item is defined in one drawing, it need not be further defined and explained in the subsequent drawings.

Claims

1. A spray pump mechanism for improving reverse efficiency, characterized in that: include: Propulsion structure (100); a flow direction guiding structure (200), the flow direction guiding structure (200) being hinged to the rear end of the propulsion structure (100); A reverse drive structure (300), wherein a drive end of the reverse drive structure (300) is arranged on the upper side of the flow direction guiding structure (200), an output end of the reverse drive structure (300) spans the outer side of the rear end of the flow direction guiding structure (200), and a middle portion of the output end of the reverse drive structure (300) is hinged to the flow direction guiding structure (200); An upper redirecting plate structure (400), the upper redirecting plate structure (400) being fixedly connected to the lower end of the output end of the reverse driving structure (300); when the upper redirecting plate structure (400) and the lower redirecting plate structure (500) are closed, the upper redirecting plate structure (400) can seal the lower side of the flow guide structure (200); when the upper redirecting plate structure (400) and the lower redirecting plate structure (500) are opened, the upper redirecting plate structure (400) can seal the internal backward passage of the flow guide structure (200); and both sides of the upper redirecting plate structure (400) are in contact with the inner walls of both sides of the flow guide structure (200); a lower redirecting plate structure (500), wherein the rear end of the lower redirecting plate structure (500) is hinged between the lower end of the output end of the reverse drive structure (300) and the upper redirecting plate structure (400), and both sides of the lower redirecting plate structure (500) are attached to the outer walls of both sides of the flow guide structure (200), and both sides of the lower redirecting plate structure (500) seal both sides of the flow guide structure (200); An angled connecting rod structure (600), wherein a fixed end of the angled connecting rod structure (600) is fixed to the outside of the lower redirecting plate structure (500), an end of the fixed end of the angled connecting rod structure (600) is hinged to the lower end of the output end of the reverse driving structure (300), and the other end of the angled connecting rod structure (600) is hinged to the flow direction guiding structure (200).

2. The spray pump mechanism for improving reverse efficiency according to claim 1, characterized in that: The propulsion structure (100) includes a jet pump (110), a U-shaped reinforcement seat (120) and an articulated seat (130), wherein the U-shaped reinforcement seat (120) is respectively arranged on the upper and lower sides of the rear end of the jet pump (110), and the articulated seat (130) is fixedly connected to the rear end of the U-shaped reinforcement seat (120), and the upper and lower sides of the front end of the flow direction guiding structure (200) are respectively hinged to the articulated seat (130).

3. The spray pump mechanism for improving reverse efficiency according to claim 1, characterized in that: The flow direction guiding structure (200) includes a connecting cylinder (210), a guiding cylinder (220) and a steering cylinder (240). The upper and lower sides of the front end of the connecting cylinder (210) are hinged to the rear end of the propulsion structure (100). The water flow ejected by the propulsion structure (100) is directed toward the connecting cylinder (210). The guiding cylinder (220) is fixedly connected to the rear end of the connecting cylinder (210). The lower side of the guiding cylinder (220) is open, and a transition groove (230) is provided on the lower side opening of the guiding cylinder (220). The upper redirecting plate structure (400) can swing forward along the transition groove (230). When the upper redirecting plate structure (400) and the lower redirecting plate structure (500) are closed, the upper redirecting plate structure (400) can seal the lower opening of the guide cylinder (220); when the upper redirecting plate structure (400) and the lower redirecting plate structure (500) are opened, the upper redirecting plate structure (400) seals the rearward passage inside the guide cylinder (220), and the lower redirecting plate structure (500) seals the transition groove (230) on both sides. The output end of the steering cylinder (240) is hinged to the upper side of the connecting cylinder (210), and the steering cylinder (240) can drive the connecting cylinder (210) to swing left and right.

4. The spray pump mechanism for improving reverse efficiency according to claim 3, characterized in that: The flow direction guiding structure (200) further includes a steering articulated shaft (250), a reversing oil cylinder seat (260), a steering connecting shaft (270), a connecting rod base (280) and a reinforcing plate (290), wherein the steering articulated shaft (250) is fixedly plugged into the upper and lower ends of the connecting cylinder (210), and the upper and lower sides of the rear end of the propulsion structure (100) are respectively rotatably connected to the steering articulated shaft (250), the reversing oil cylinder seat (260) is fixedly connected to the outer wall of the upper side of the guiding cylinder (220), and the driving end of the reversing driving structure (300) is hinged to the reversing oil cylinder seat (260). ), the steering connecting shaft (270) is fixedly plugged into the connecting tube (210), the output end of the steering oil cylinder (240) is rotatably connected to the steering connecting shaft (270), the connecting rod base (280) is fixedly connected to the outer wall of the rear end of the connecting tube (210), one end of the angled connecting rod structure (600) is hinged to the connecting rod base (280), the reinforcing plates (290) are respectively arranged in the middle of the outer walls on both sides of the guide tube (220), and the middle of the output end of the reverse drive structure (300) is hinged to the reinforcing plate (290) and the guide tube (220).

5. The spray pump mechanism for improving reverse efficiency according to claim 3, characterized in that: The connecting tube (210) comprises an outward-turned side plate (211), a connecting plate (212) and a reinforcing limiting plate (213). The outward-turned side plate (211) is provided in two pieces. The upper ends and lower ends of the two outward-turned side plates (211) are fixedly connected by the two connecting plates (212). The angle between the two outward-turned side plates (211) forms a bell mouth with a larger front end and a smaller rear end. The water flow ejected by the propulsion structure (100) is directed toward the large mouth of the bell mouth. The reinforcing limiting plates (213) are respectively fixedly connected between the two connecting plates (212) at the upper ends of the outward-turned side plates (211). The reinforcing limiting plates (213) are located on both sides of the hinge of the propulsion structure (100). The reinforcing limiting plates (213) block the propulsion structure (100) to achieve the restriction of the left and right turning of the connecting tube (210).

6. The spray pump mechanism for improving reverse efficiency according to claim 1, characterized in that: The reverse driving structure (300) comprises a rotating frame (310) and a reverse oil cylinder (320), wherein the reverse oil cylinder (320) is a driving end of the reverse driving structure (300), and the rotating frame (310) is an output end of the reverse driving structure (300). The reverse oil cylinder (320) is hinged to the upper side of the flow direction guiding structure (200), and the output end of the reverse oil cylinder (320) is hinged to the top end of the rotating frame (310). The rotating frame (310) spans the outer side of the rear end of the flow direction guiding structure (200), and the middle part of the rotating frame (310) is hinged to both sides of the flow direction guiding structure (200). The upper redirecting plate structure (400) is fixedly connected to the inside of the lower end of the rotating frame (310), and both sides of the lower redirecting plate structure (500) are respectively hinged between the rotating frame (310) and the upper redirecting plate structure (400).

7. The spray pump mechanism for improving reverse efficiency according to claim 6, characterized in that: The rotating frame (310) includes a door-shaped frame body (311), a flip pin (312), a hinge pin (313) and a cylinder propulsion seat (314). The flip pin (312) is fixedly inserted into the left and right sides of the middle of the door-shaped frame body (311). The flip pin (312) is hinged to the two sides of the flow direction guide structure (200) respectively. The upper redirecting plate structure (400) is fixedly connected to the inside of the lower end of the door-shaped frame body (311). The hinge pin (313) is provided in two pieces. The two hinge pins (313) are respectively hinged to the two sides of the flow direction guide structure (200). The pins (313) are respectively fixedly inserted between the inner side wall of the lower end of the door-shaped frame (311) and the outer side wall of the upper redirecting plate structure (400); the rear end of the lower redirecting plate structure (500) is hinged between the inner side wall of the lower end of the door-shaped frame (311) and the outer side wall of the upper redirecting plate structure (400) through the hinge pins (313); the oil cylinder propulsion seat (314) is fixedly connected to the top end of the door-shaped frame (311); and the output end of the reverse oil cylinder (320) is hinged to the oil cylinder propulsion seat (314).

8. The spray pump mechanism for improving reverse efficiency according to claim 1, characterized in that: The upper redirecting plate structure (400) comprises an upper arched arc baffle (410), an upper side sealing plate (420), an upper guide plate (430) and a fixed plate (440), wherein the upper side sealing plate (420) is fixedly connected to both sides of the upper arched arc baffle (410), the upper guide plate (430) is evenly spaced and arranged on the inner side of the upper arched arc baffle (410) and between the two upper side sealing plates (420), the fixed plate (440) is fixedly connected to the outer side of the upper side sealing plate (420), the rear end of the upper arched arc baffle (410) and the fixed plate (440) are both fixedly connected to the lower end of the output end of the reversing drive structure (300), and the rear end of the lower redirecting plate structure (500) is hinged between the rear end of the upper side sealing plate (420) and the lower end of the output end of the reversing drive structure (300).

9. The spray pump mechanism for improving reverse efficiency according to claim 1, characterized in that: The lower redirecting plate structure (500) comprises a lower arched arc baffle (510), a lower side sealing plate (520) and a lower guide plate (530), wherein the lower side sealing plate (520) is fixedly connected to both sides of the lower arched arc baffle (510), and the lower guide plate (530) is evenly spaced and arranged on the inner side of the lower arched arc baffle (510) and between the two lower side sealing plates (520). The rear end of the lower side sealing plate (520) is hinged between the lower end of the output end of the reverse driving structure (300) and the upper redirecting plate structure (400), and the lower side sealing plate (520) seals both sides of the flow direction guiding structure (200).

10. The spray pump mechanism for improving reverse efficiency according to claim 9, characterized in that: The angled link structure (600) comprises a reinforcing link (610), a movable link (620), a connecting pin (630) and a fixed pin (640). The reinforcing link (610) is fixedly connected to the outer side of the lower side sealing plate (520). The rear end of the lower side sealing plate (520) and the tail end of the reinforcing link (610) are hinged between the lower end of the output end of the reverse drive structure (300) and the upper redirecting plate structure (400). One end of the movable link (620) is connected to the upper redirecting plate structure (400). The connecting pin (630) is hinged to the front end of the reinforcing link (610), and the other end of the movable link (620) is hinged to the flow direction guiding structure (200) through the fixed pin (640). The hinge point where the movable link (620) and the reinforcing link (610) are hinged to each other is lower than another hinge point between the movable link (620) and the reinforcing link (610), so that the movable link (620) and the reinforcing link (610) form a V-shaped angle.

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