Self-rotating fixed pressure vessel

Abstract

The invention belongs to the field of pressure vessel use, and particularly relates to a self-rotating fixed pressure vessel which comprises a base. A connecting plate is arranged at the top of the base, a fixing frame is arranged at the top of the connecting plate, a tank body is arranged in the fixing frame, a movable assembly is arranged on the side wall of the tank body and fixedly connected to the interior of the tank body, the movable assembly comprises a tank bottom, and a discharging port is formed in the bottom of the tank bottom. One end of the discharging port is communicated with the interior of the tank bottom, an impeller and a stirring plate are arranged in the discharging port, the impeller is rotationally connected to the interior of the discharging port through a shaft, a movable rod is driven to rotate synchronously when a rotating plate rotates, and one end of the movable rod pushes the bottom of the tank bottom through sliding connection between the movable rod and a fixed seat; and one end of the movable rod impacts the bottom of the tank bottom, so that the solution in the tank bottom flows into the discharge port, and the condition that the solution is accumulated in the discharge port is avoided.

Description

Technical Field

[0001] This invention relates to the field of pressure vessel applications, specifically a self-rotating fixed pressure vessel. Background Technology

[0002] A pressure vessel is a sealed device that holds gas or liquid and bears a certain pressure. Traditionally, pressure vessels are mostly placed horizontally or vertically. A few pressure vessels have a rotatable function, which allows the solution inside the pressure vessel to be mixed evenly through rotation.

[0003] Traditional pressure vessels cannot simultaneously fulfill functions such as material loading, release, stirring, heating, pressurization, and cooking. They cannot smoothly complete the heating, pressurization, and cooking of raw materials such as plants, crops, animal carcasses, and minerals. To achieve the dissolution effect of materials, the solution after cooking and decomposition is poured into the interior of the pressure vessel. This limits the use of pressure vessels in plant fiber separation, plant cellulose hydrolysis, preparation of plant-derived humic acid, extraction of organic fertilizers, plant maturation, plant carbonization, preparation of organic acids, harmless treatment of animal carcasses and waste, refining of animal fats, refining of animal bone meal, and refining of animal proteins. By rotating the pressure vessel, the solution inside is mixed, and the mixed solution is discharged from the vessel through the pressure vessel, thereby achieving the mixing effect of liquids.

[0004] Because the pressure vessel is rotating, the solution directly enters the interior of the outlet. However, the solution at the outlet cannot fully contact the solution inside the vessel, resulting in uneven mixing of the solution inside the tank. This causes the solution to be viscous and thin during mixing, affecting the discharge efficiency of the solution inside the pressure vessel. Furthermore, the viscous solution will accumulate at the bottom of the tank. Therefore, a self-rotating fixed pressure vessel is proposed to address the above problems. Summary of the Invention

[0005] To overcome the shortcomings of existing technologies and solve the problems existing in existing technologies, this invention proposes a self-rotating fixed pressure vessel.

[0006] The technical solution adopted by the present invention to solve its technical problem is as follows: A self-rotating fixed pressure vessel of the present invention includes a base; a connecting plate is provided on the top of the base, a fixing frame is provided on the top of the connecting plate, a telescopic rod is hinged to the bottom of the fixing frame, a tank body is provided inside the fixing frame, a movable component is provided on the side wall of the tank body, the movable component is fixedly connected to the inside of the tank body, the movable component includes a tank bottom, a discharge port is provided at the bottom of the tank bottom, one end of the discharge port is connected to the inside of the tank bottom, an impeller and a stirring plate are provided inside the discharge port, the impeller is rotatably connected to the inside of the discharge port via a shaft, the side wall of the stirring plate is fixedly connected to the inside of the discharge port, a baffle is fixedly connected to the inside of the discharge port adjacent to the stirring plate, a rotating plate is rotatably connected to one end of the impeller, a fixed seat is fixedly provided on the outer wall of the discharge port, the bottom of the fixed seat is fixedly connected to the outside of the discharge port, a retaining ring is rotatably connected to the top of the fixed seat, a movable rod is hinged to the side wall of the rotating plate, and one end of the movable rod intermittently contacts the side wall of the tank body through the retaining ring.

[0007] Preferably, the tank body has a feed inlet on its side wall, and a support is provided on the side wall of the feed inlet. The bottom of the support is fixed to the top of the feed inlet, and a protective plate is rotatably connected inside the support.

[0008] Preferably, the side wall of the tank is provided with a water inlet pipe and a fixing ring. There are two water inlet pipes, and one end of each water inlet pipe is embedded inside the tank. The fixing ring is rotatably connected to the opposite side of the water inlet pipe.

[0009] Preferably, the side wall of the tank is provided with two rolling rings, and the two rolling rings are fixed to the outside of the tank. The tank is rotatably connected to the inside of the fixed frame through the rolling rings.

[0010] Preferably, the fixing frame is provided with rollers inside, and there are several sets of rollers. The sidewalls of the rollers are rotatably connected to the sidewalls of the rolling ring, and the sidewalls of the rollers are rotatably connected to the inside of the fixing frame.

[0011] Preferably, a motor is fixedly connected to the top of the fixing frame, a sprocket is provided at one end of the motor, a chain is provided on the side wall of the sprocket, the side wall of the chain is rotatably connected to the side wall of the sprocket, and the side wall of the sprocket is rotatably connected to the side wall of the roller.

[0012] Preferably, the bottom of the fixing frame is provided with two limiting seats, and the tops of the two limiting seats are symmetrically fixed to the bottom of the fixing frame. The connecting plate is rotatably connected to the inside of the limiting seats. The side wall of the connecting plate is provided with a limiting plate and a pin. One end of the pin passes through the limiting plate and is rotatably connected to the side wall of the connecting plate.

[0013] Preferably, a stop block is snapped onto the top of the base, and a telescopic rod is rotatably connected to the side wall of the stop block, with one end of the telescopic rod rotatably connected inside the limiting seat.

[0014] The advantages of this invention are:

[0015] 1. This invention utilizes the reverse rotation of the tank to evenly distribute the solution at the bottom of the tank. A stirring plate fixed to the side wall of the outlet allows the solution at the bottom of the tank to enter one side of a baffle. The synchronous rotation of the stirring plate and baffle inside the outlet causes the solution to flow back into the tank, thus achieving a refining effect. When the tank rotates forward, the fixed connection between the tank body and the bottom causes the tank body to drive the bottom to rotate. This rotation of the bottom allows the solution inside the tank to enter the outlet. In this process, when the outlet rotates, the solution flows to the other end of the outlet through the rotation of the stirring plate and baffle. The solution drives the impeller to rotate, and the rotation between the impeller and the rotating plate causes the impeller to drive the rotating plate to rotate synchronously. When the rotating plate rotates, it drives the movable rod to rotate synchronously. Through the sliding connection between the movable rod and the fixed seat, one end of the movable rod pushes the bottom of the tank. The movable rod then hits the bottom of the tank, causing the solution inside the tank to flow into the outlet, thus preventing the solution from accumulating inside the outlet.

[0016] 2. This invention utilizes the rotation of a motor to drive a sprocket. A chain connecting the two sprockets synchronizes their rotation. The rotation between the sprocket sidewall and the roller causes the sprocket to drive the roller. The rotation between the roller and the rolling ring causes the rolling ring to rotate in the opposite direction. The fixed connection between the rolling ring and the tank body allows the rolling ring to drive the tank body to rotate. Through the rotation of the tank body, the pressure vessel is used to mix the solution.

[0017] 3. This invention rotates the protective plate, causing its sidewall to rotate to the top of the inlet under the action of the support base. This rotation between the protective plate and the support base secures the protective plate to the top of the inlet, achieving a protective effect and preventing the solution from flowing out of the inlet when the tank rotates. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1This is a schematic diagram of the base structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the discharge port structure of the present invention;

[0021] Figure 3 This is a schematic diagram of a partial structure of the impeller of the present invention;

[0022] Figure 4 This is a schematic diagram of a partial structure of the rolling ring of the present invention;

[0023] Figure 5 This is a schematic diagram of a partial structure of the tank body of the present invention;

[0024] Figure 6 This is a schematic diagram of a partial structure of the chain of the present invention.

[0025] In the diagram: 1. Base; 2. Limiting plate; 3. Pin; 4. Connecting plate; 5. Stop; 6. Telescopic rod; 7. Limiting seat; 8. Fixing frame; 9. Water inlet pipe; 10. Fixing ring; 11. Protective plate; 12. Motor; 13. Tank body; 14. Roller; 15. Tank bottom; 16. Movable rod; 17. Rotating plate; 18. Discharge port; 19. Stirring plate; 20. Baffle; 21. Fixing seat; 22. Snap ring; 23. Impeller; 24. Feed inlet; 25. Support seat; 26. Rolling ring; 27. Sprocket; 28. Chain. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Please see Figure 1 - Figure 6 As shown, a self-rotating fixed pressure vessel includes a base 1; a connecting plate 4 is provided on the top of the base 1, a fixing frame 8 is provided on the top of the connecting plate 4, a telescopic rod 6 is hinged to the bottom of the fixing frame 8, a tank body 13 is provided inside the fixing frame 8, and a movable component is provided on the side wall of the tank body 13, the movable component being fixedly connected to the inside of the tank body 13.

[0028] The movable component includes a tank bottom 15, with a discharge port 18 at the bottom of the tank bottom 15. One end of the discharge port 18 is connected to the interior of the tank bottom 15. An impeller 23 and a stirring plate 19 are disposed inside the discharge port 18. The impeller 23 is rotatably connected to the interior of the discharge port 18 via a shaft. The side wall of the stirring plate 19 is fixed to the interior of the discharge port 18. A baffle 20 is fixed to the interior of the discharge port 18 adjacent to the stirring plate 19. The central shaft of the impeller 23 passes through the discharge port 18 and is rotatably connected to a rotating plate 17. A fixed seat 21 is disposed at the top of the discharge port 18. The bottom of the fixed seat 21 is fixed to the outside of the discharge port 18. A retaining ring 22 is rotatably connected to the top of the fixed seat 21. A movable rod 16 is hinged to the side wall of the rotating plate 17. One end of the movable rod 16 intermittently contacts the side wall of the tank body 13 through the retaining ring 22.

[0029] During operation, because the pressure vessel is rotating, the solution directly enters the outlet. However, the solution at the outlet cannot fully contact the solution inside the vessel, resulting in uneven mixing of the solution inside the tank. This causes the solution to be viscous and thin during mixing, affecting the discharge efficiency of the solution inside the pressure vessel. Furthermore, the viscous solution accumulates at the bottom of the tank. A telescopic rod 6 is rotatably connected to the inside of a limiting seat 7. The telescopic rod 6 drives one side of the limiting seat 7 downwards. Through the rotatable connection between the fixing frame 8 and the limiting seat 7, the tank 13 is tilted, making it easier to discharge the solution inside the tank 13. When the outlet 18 is tilted, the solution flows through the stirring plate 19 and baffle 20 to the other end of the outlet 18, driving the impeller 23 to rotate. 3. The central shaft passes through the side wall of the discharge port 18 and is fixedly connected to the rotating plate 17. The central shaft is located off the center of the rotating plate 17. Due to the uneven mixing of the solution itself, the solution inside the tank bottom 15 slides slowly. The solution drives the impeller 23 to rotate, and the impeller 23 drives the rotating plate 17 to rotate synchronously. The rotating plate 17 drives the movable rod 16 to move. The locking between the fixed seat 21 and the retaining ring 22 limits the reciprocating motion of the movable rod 16. When the movable rod 16 extends and retracts, it intermittently hits the bottom of the tank bottom 15. The shaking generated by the impact causes the viscous solution inside the tank bottom 15 to slide quickly to the discharge port 18, so that all the solution inside the tank bottom 15 flows out of the tank bottom 15, reducing the situation where the viscous solution accumulates inside the tank bottom 15 and cannot be discharged.

[0030] Furthermore, such as Figure 1 As shown, the tank body 13 has a feed inlet 24 on its side wall, and a support 25 is provided on the side wall of the feed inlet 24. The bottom of the support 25 is fixed to the top of the feed inlet 24, and a protective plate 11 is rotatably connected inside the support 25.

[0031] During operation, by rotating the protective plate 11, the side wall of the protective plate 11 is rotated to the top of the feed inlet 24 under the action of the support seat 25. By utilizing the rotation between the protective plate 11 and the support seat 25, the protective plate 11 is locked onto the top of the feed inlet 24, thereby achieving the protective effect of the feed inlet 24 and preventing the solution inside the tank 13 from flowing out through the feed inlet 24.

[0032] Furthermore, such as Figure 1 As shown, the side wall of the tank 13 is provided with a water inlet pipe 9 and a fixing ring 10. There are two water inlet pipes 9, and one end of each water inlet pipe 9 is embedded inside the tank 13. The fixing ring 10 is rotatably connected to the opposite side of the water inlet pipe 9.

[0033] During operation, by pushing the water inlet pipe 9, one end of the water inlet pipe 9 is embedded inside the fixing ring 10. At the same time, the fixing ring 10 fixes the other end of the two water inlet pipes 9, thus achieving the effect of fixing the water inlet pipe 9. Water flows into the interior of the tank 13 through the water inlet pipe 9, which facilitates the mixing effect of the water flow and the solution inside the tank 13.

[0034] Furthermore, such as Figure 4 As shown, the side wall of the tank body 13 is provided with two rolling rings 26, and the side walls of the two rolling rings 26 are fixed to the outside of the tank body 13. The tank body 13 is rotatably connected to the inside of the fixed frame 8 through the rolling rings 26.

[0035] During operation, the two rollers 26 on the outside of the tank 13 allow the tank 13 to indirectly contact the inside of the fixing frame 8, thereby achieving the fixing effect of the tank 13.

[0036] Furthermore, such as Figure 5 As shown, the fixed frame 8 is provided with rollers 14 inside, and there are several sets of rollers 14. The side wall of the rollers 14 is rotatably connected to the side wall of the rolling ring 26, and the side wall of the rollers 14 is rotatably connected to the inside of the fixed frame 8.

[0037] During operation, the rotation between roller 14 and roller ring 26 causes roller 14 to rotate in the opposite direction, which in turn drives roller ring 26 to rotate in the opposite direction. The reverse rotation of tank 13 ensures that the solution inside tank 13 is mixed evenly. At the same time, the reverse rotation of tank 13 causes the stirring plate 19 and baffle 20 inside outlet 18 to rotate synchronously. The stirring plate 19 and baffle 20 cause the solution to flow back into the interior of tank 13, preventing the solution from accumulating at the bottom of tank 15 and becoming unmixable.

[0038] Furthermore, such as Figure 6As shown, a motor 12 is fixedly connected to the top of the fixed frame 8. A sprocket 27 is provided at one end of the motor 12. A chain 28 is provided on the side wall of the sprocket 27. The side wall of the chain 28 is rotatably connected to the side wall of the sprocket 27. The side wall of the sprocket 27 is rotatably connected to the side wall of the roller 14.

[0039] During operation, the fixed connection between the motor 12 and the fixed frame 8 causes the fixed frame 8 to be in an inclined state. The bottom of the motor 12 is fixed to the top of the fixed frame 8. The rotation of the motor 12 causes the sprocket 27 to rotate. The chain 28 that rotates between the two sprockets 27 causes the sprockets 27 to rotate synchronously, so that the sprockets 27 can drive the roller 14 to rotate synchronously, and the sprockets 27 can drive the tank body 13 to rotate.

[0040] Furthermore, such as Figure 1 As shown, the bottom of the fixing frame 8 is provided with two limiting seats 7, and the tops of the two limiting seats 7 are symmetrically fixed to the bottom of the fixing frame 8. The connecting plate 4 is rotatably connected to the inside of the limiting seats 7. The side wall of the connecting plate 4 is provided with a limiting plate 2 and a pin 3. One end of the pin 3 passes through the limiting plate 2 and is rotatably connected to the side wall of the connecting plate 4.

[0041] During operation, when the base 1 is damaged, pull the pin 3 to move one end of the pin 3 away from the inside of the limiting plate 2, and pull the base 1 to move the base 1 away from the bottom of the connecting plate 4. After replacement, push the limiting plate 2 to make the side wall of the limiting plate 2 contact the side wall of the connecting plate 4, and rotate the pin 3 to make one end of the pin 3 embed into the inside of the connecting plate 4, thus completing the replacement of the base 1.

[0042] Furthermore, such as Figure 1 As shown, a stop block 5 is snapped onto the top of the base 1, and a telescopic rod 6 is rotatably connected to the side wall of the stop block 5;

[0043] During operation, the telescopic rod 6 is tilted and contacts the bottom of the fixed frame 8 through the rotational connection between the stop block 5 and the telescopic rod 6, thus achieving the desired effect of using the telescopic rod 6.

[0044] Working principle: Because the pressure vessel is rotating, the solution directly enters the outlet. However, the solution at the outlet cannot fully contact the solution inside the vessel, resulting in uneven mixing. This causes the solution to vary in viscosity during mixing, affecting the discharge efficiency of the pressure vessel. Furthermore, the viscous solution accumulates at the bottom of the vessel. When the base 1 is damaged, pulling the pin 3 moves one end away from the inside of the limiting plate 2, and pulling the base 1 moves it away from the bottom of the connecting plate 4. After replacement, pushing the limiting plate 2 brings its sidewall into contact with the sidewall of the connecting plate 4. Rotating the pin 3 causes one end of it to embed into the connecting plate 4, thus achieving the desired effect. The replacement of base 1 involves rotating the protective plate 11, causing its side wall to rotate to the top of the inlet 24 under the action of the support 25. The solution to be processed is then poured into the tank 13 through the inlet 24. Pushing the water inlet pipe 9 causes one end of it to embed into the fixing ring 10, which simultaneously fixes the other ends of both water inlet pipes 9, thus securing them. Water flows into the tank 13 through the water inlet pipe 9, facilitating mixing with the solution inside. The rotation of the motor 12 drives the sprocket 27, which rotates synchronously with the chain 28 connecting the two sprockets 27. The rotation between the side wall of sprocket 27 and roller 14 causes sprocket 27 to drive roller 14 to rotate. The rotation between roller 14 and rolling ring 26 causes roller 14 to rotate in the opposite direction. The fixed connection between rolling ring 26 and tank body 13 causes rolling ring 26 to drive tank body 13 to rotate. The rotation of tank body 13 achieves the mixing of the solution in the pressure vessel. The reverse rotation of tank body 13 causes the stirring plate 19 and baffle 20 inside the outlet 18 to rotate synchronously, causing the solution to flow back into the tank body 13, thus achieving the refining effect of the solution. One end of telescopic rod 6 is rotatably connected to the inside of limiting seat 7. The telescopic rod 6 drives the limiting seat 7 on one side to move downwards. The tank 13 moves along the flow path. Through the rotatable connection between the connecting plate 4 and the limiting seat 7, the connecting plate 4 drives the limiting seat 7 to rotate to one side. Simultaneously, the fixed connection between the limiting seat 7 and the fixing frame 8 keeps the fixing frame 8 in an inclined state. The roller 14 contacts the side wall of the rolling ring 26, causing the tank 13 to be restrained by the roller 14. The rotatable connection between the fixing frame 8 and the limiting seat 7 keeps the tank 13 in an inclined state. This tilting of the tank 13 causes the solution inside the tank 13 to fall into the tank bottom 15. The reverse rotation of the motor 12 drives the rolling ring 26 to rotate, which in turn drives the tank 13 to rotate. As the tank bottom 15 rotates, the solution inside the tank bottom 13 enters the discharge port 18.The rotation of the discharge port 18 causes the solution to rotate through the stirring plate 19 and the baffle 20, driving the impeller 23 to rotate. The rotation between the impeller 23 and the rotating plate 17 causes the impeller 23 to drive the rotating plate 17 to rotate synchronously. The rotation of the rotating plate 17 then drives the movable rod 16 to rotate synchronously. Through the sliding connection between the movable rod 16 and the fixed base 21, one end of the movable rod 16 pushes against the bottom of the tank bottom 15, causing the solution inside the tank bottom 15 to flow out of the discharge port 18, preventing solution accumulation at the bottom of the tank bottom 15. This device prevents backflow of solution at the pressure vessel discharge port, avoiding solution accumulation at the discharge port.

[0045] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A self-rotating fixed pressure vessel, characterized in that: Includes a base (1); a connecting plate (4) is provided on the top of the base (1), a fixing frame (8) is provided on the top of the connecting plate (4), a telescopic rod (6) is hinged to the bottom of the fixing frame (8), a tank (13) is provided inside the fixing frame (8), and a movable component is provided on the side wall of the tank (13), and the movable component is fixed inside the tank (13); The movable component includes a tank bottom (15), with a discharge port (18) at the bottom of the tank bottom (15). One end of the discharge port (18) is connected to the interior of the tank bottom (15). An impeller (23) and a stirring plate (19) are disposed inside the discharge port (18). The impeller (23) is rotatably connected to the interior of the discharge port (18) via a shaft. The sidewall of the stirring plate (19) is fixed to the interior of the discharge port (18). The interior of the discharge port (18) is adjacent to the stirring plate (19). A baffle (20) is fixedly connected to the impeller (23), and a rotating plate (17) is rotatably connected to one end of the impeller (23). A fixed seat (21) is fixedly provided on the outer wall of the discharge port (18). The bottom of the fixed seat (21) is fixedly connected to the outside of the discharge port (18). A retaining ring (22) is rotatably connected to the top of the fixed seat (21). A movable rod (16) is provided on the side wall of the rotating plate (17). One end of the movable rod (16) intermittently contacts the side wall of the tank (13) through the retaining ring (22).

2. A self-rotating fixed pressure vessel according to claim 1, characterized in that: The tank body (13) has a feed inlet (24) on its side wall. A support seat (25) is provided on the side wall of the feed inlet (24). The bottom of the support seat (25) is fixed to the top of the feed inlet (24). A protective plate (11) is rotatably connected inside the support seat (25).

3. A self-rotating fixed pressure vessel according to claim 2, characterized in that: The tank (13) is provided with a water inlet pipe (9) and a fixing ring (10) on its side wall. There are two water inlet pipes (9), and one end of each water inlet pipe (9) is embedded inside the tank (13). The fixing ring (10) is rotatably connected to the opposite side of the water inlet pipe (9).

4. A self-rotating fixed pressure vessel according to claim 3, characterized in that: The side wall of the tank (13) is provided with two rollers (26), and the side walls of the two rollers (26) are fixed to the outside of the tank (13). The tank (13) is rotatably connected to the inside of the fixed frame (8) through the rollers (26).

5. A self-rotating fixed pressure vessel according to claim 4, characterized in that: The fixed frame (8) is provided with rollers (14) inside. Several sets of rollers (14) are provided, and the side wall of the rollers (14) is rotatably connected to the side wall of the rolling ring (26). The side wall of the rollers (14) is rotatably connected to the inside of the fixed frame (8).

6. A self-rotating fixed pressure vessel according to claim 5, characterized in that: A motor (12) is fixedly connected to the top of the fixed frame (8). A sprocket (27) is provided at one end of the motor (12). A chain (28) is provided on the side wall of the sprocket (27). The side wall of the chain (28) is rotatably connected to the side wall of the sprocket (27). The side wall of the sprocket (27) is rotatably connected to the side wall of the roller (14).

7. A self-rotating fixed pressure vessel according to claim 6, characterized in that: The bottom of the fixed frame (8) is provided with two limiting seats (7), and the tops of the two limiting seats (7) are symmetrically fixed to the bottom of the fixed frame (8). The connecting plate (4) is rotatably connected to the inside of the limiting seats (7). The side wall of the connecting plate (4) is provided with a limiting plate (2) and a pin (3). One end of the pin (3) passes through the limiting plate (2) and is rotatably connected to the side wall of the connecting plate (4).

8. A self-rotating fixed pressure vessel according to claim 7, characterized in that: The top of the base (1) is fitted with a stop (5), and the side wall of the stop (5) is rotatably connected to a telescopic rod (6).

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