Ventilation cabinet flow guide support

Abstract

The utility model relates to the technical field of experimental equipment, and discloses a ventilation cabinet flow guide support which comprises a cabinet body, a flow guide plate is installed in the cabinet body, a limiting rod is fixedly connected in the flow guide plate, an adjusting frame is rotatably connected to the inner wall of the flow guide plate, and an arc-shaped groove is formed in the adjusting frame. A flow guide assembly is mounted in the adjusting frame; and the flow guide assembly comprises a plurality of fixing shafts, the two ends of each fixing shaft are fixedly connected to the inner wall of the adjusting frame, the outer walls of the fixing shafts are rotationally connected with flow guide plates, and the outer walls of the flow guide plates are rotationally connected with connecting plates. According to the utility model, by pressing the sliding rod, the clamping teeth are separated from the positioning teeth, and the spring I is shrunk along with the clamping teeth; the handle is rotated, the half gear is meshed with the external rack, and the drainage plate is driven to rotate around the fixing shaft for adjustment; after adjustment is completed, the sliding rod is loosened, the spring pushes the sliding rod to reset, the clamping teeth are clamped with the positioning teeth to complete fixation, operation is convenient, and practicability of the support is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to experimental equipment technical field especially, relates to a ventilation cabinet flow guide support. BACKGROUND

[0002] Ventilation cabinet is indispensable equipment in laboratory, aims at discharging harmful gas, smoke, dust generated in experiment, guards health and instrument equipment safety of experimental personnel. Its cabinet body props up integral frame, table surface endures acid alkali, high temperature, ventilation system helps fan, pipeline, and strongly exhausts pollutant to outdoor. Flow guide support is significant in ventilation cabinet, it optimizes ventilation effect, guides gas to flow according to the intended direction skillfully, lets harmful gas be extracted quickly, can also control air current direction, prevents strong wind from impacting experimental goods, equipment, reduces operating error and damage, more critical is, it builds safety barrier, isolates harmful gas and operating personnel, reduces accident probability.

[0003] The existing ventilation cabinet flow guide support is usually installed in the inside of the ventilation cabinet during use, and the harmful gas in the ventilation cabinet is guided out of the inside of the ventilation cabinet through the flow guide support by the flow guide device, but the existing flow guide support lacks an angle-adjustable structure during use, so that the existing flow guide support cannot be adjusted according to the position of the harmful gas when the harmful gas is at different heights, thereby the effect of efficiently guiding the harmful gas out of the ventilation cabinet cannot be achieved, and the practicability of the flow guide support is reduced, so a ventilation cabinet flow guide support is proposed to solve the above problems. UTILITY MODEL CONTENTS

[0004] In order to make up for the above shortcomings, the utility model provides a ventilation cabinet flow guide support, which aims at improving the problem that the flow guide support in the prior art lacks a structure for adjusting according to the position of harmful gas, thereby the flow guide support cannot efficiently guide harmful gas, and the practicability of the flow guide support is greatly reduced.

[0005] To achieve the above object, the utility model provides the following technical scheme: a ventilation cabinet flow guide support, including cabinet body, the cabinet body interior is installed with flow guide plate, the flow guide plate interior fixedly connected with limiting rod, the flow guide plate inner wall is connected with adjusting frame rotatably, the adjusting frame interior is set with arc slot, the adjusting frame interior is installed with flow guide assembly;

[0006] The flow guide assembly comprises a plurality of fixed shafts, both ends of the fixed shafts are fixedly connected to the inner wall of the adjusting frame, the outer wall of the fixed shaft is rotatably connected with a drainage plate, the outer wall of the drainage plate is rotatably connected with a connecting plate, one side of the outer wall of the connecting plate is fixedly connected with an external rack, one side of the inner wall of the adjusting frame is fixedly connected with a fixed column, the inner part of the fixed column is rotatably connected with a sleeve, the outer wall of the sleeve is fixedly connected with a handle, one side of the outer wall of the handle is fixedly connected with a half gear, the half gear is meshingly connected with the outer wall of the external rack, and the fixed column is provided with a positioning assembly.

[0007] Through the above technical scheme, the angle of the drainage plate can be conveniently adjusted.

[0008] Further, the positioning assembly comprises a positioning tooth fixedly connected to the inner wall of the fixed column, a spring I fixedly connected to one side of the inner wall of the fixed column, a sliding rod fixedly connected to one end of the spring I, a clamping tooth fixedly connected to the outer wall of the sliding rod, the clamping tooth is in clamping connection with the positioning tooth, and the outer wall of the sliding rod is slidably connected to the inner wall of the sleeve.

[0009] Through the above technical scheme, the angle of the drainage plate can be conveniently adjusted.

[0010] Further, the inner wall of the cabinet is fixedly connected with left-right symmetrical guide rails at the top, the inner wall of the drainage plate is slidably connected to the outer wall of the guide rail, the inner part of the cabinet is slidably connected with a mounting plate, the inner part of the cabinet is provided with a limiting assembly, and one side of the outer wall of the mounting plate is provided with a fixing assembly.

[0011] Through the above technical scheme, the drainage plate can be moved and limited.

[0012] Further, the limiting assembly comprises a fixed rod, both ends of the fixed rod are fixedly connected to the inner wall of the cabinet, the outer wall of the fixed rod is rotatably connected with an L-shaped plate, the upper surface of the L-shaped plate is fixedly connected with an abutting block, and one side of the outer wall of the abutting block abuts against one side of the outer wall of the mounting plate.

[0013] Through the above technical scheme, the mounting plate can be fixed.

[0014] Further, the fixing assembly comprises a plug rod, one end of the plug rod is fixedly connected to one side of the outer wall of the mounting plate, the inner part of the plug rod is slidably connected with a spring II, one end of the spring II is fixedly connected with a protruding block, and the outer wall of the plug rod is slidably connected with a mounting rod.

[0015] Through the above technical scheme, the mounting rod can be fixed.

[0016] Further, the limiting rod is slidably connected to the inner wall of the arc-shaped groove, and the limiting rod is used for limiting the movement of the arc-shaped groove.

[0017] By the above technical scheme, the effect of preventing the adjustment frame from being displaced and falling off is achieved.

[0018] Further, the mounting rod is fixedly connected at one end to one side of the outer wall of the flow guide plate, and the flow guide plate is used for fixing the mounting rod.

[0019] By the above technical scheme, the effect of facilitating quick fixing of the flow guide plate is achieved.

[0020] Further, the outer wall of the protruding block penetrates the insertion rod and is slidingly connected inside the mounting rod, and the protruding block is used for fixing the mounting rod.

[0021] By the above technical scheme, the effect of facilitating prevention of the mounting rod from falling off is achieved.

[0022] The utility model has the following beneficial effects:

[0023] 1. In the utility model, the click is made to slide inside the fixed column by pressing the sliding rod, at this time, the click is made to disengage from the inner wall of the positioning tooth, and then the spring is made to contract, and then the half gear is made to mesh with the external rack by rotating the handle, and then the connecting plate drives the drainage plate to rotate and adjust on the outer wall of the fixed shaft, after the adjustment is completed, the click is made to engage and fix on the outer wall of the positioning tooth by releasing the sliding rod and pushing the sliding rod back by the spring, and then the practicality of the support is improved.

[0024] 2. In the utility model, the effect that the abutting block drives the L-shaped plate to rotate on the outer wall of the fixed rod is achieved by pulling the mounting plate, and the effect that the mounting rod is driven to move is achieved by the insertion rod, so that the effect that the flow guide plate is pulled to slide on the outer wall of the guide rail is achieved, at this time, the effect that the mounting plate and the flow guide plate are disassembled is achieved by pressing the protruding block to disengage from the inside of the mounting rod, so that the effect that the flow guide plate is quickly disassembled and repaired is achieved, and the service life of the fume hood is improved. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 A three-dimensional structure schematic diagram of a fume hood flow guide support is provided for the utility model;

[0026] Figure 2 An adjustment frame part structure schematic diagram of a fume hood flow guide support is provided for the utility model;

[0027] Figure 3 A connecting plate part structure schematic diagram of a fume hood flow guide support is provided for the utility model;

[0028] Figure 4 A zoomed-in view of A in Figure 3

[0029] ​Figure 5 A mounting plate part structure schematic view of a fume hood flow guide support is provided in the utility model.

[0030] Figure 6 A mounting rod part structure schematic view of a fume hood flow guide support is provided in the utility model.

[0031] Figure 7 For Figure 6 The enlarged view of B in the figure.

[0032] Figure 8 For Figure 6 The enlarged view of C in the figure.

[0033] Legend:

[0034] 1, cabinet body; 2, flow guide plate; 3, limiting rod; 4, adjusting frame; 5, arc-shaped groove; 6, fixed shaft; 7, drainage plate; 8, connecting plate; 9, external rack; 10, fixed column; 11, handle; 12, half gear; 13, positioning tooth; 14, sleeve; 15, sliding rod; 16, clamping tooth; 17, spring one; 18, guide rail; 19, fixed rod; 20, L-shaped plate; 21, abutting block; 22, mounting plate; 23, plug rod; 24, spring two; 25, protruding block; 26, mounting rod. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0036] With reference to Figure 1 - Figure 4 An embodiment provided by the utility model: a fume hood flow guide support, comprising a cabinet body 1, the cabinet body 1 is internally provided with a flow guide plate 2, the flow guide plate 2 is internally and fixedly connected with a limiting rod 3, the flow guide plate 2 is rotatably connected with an adjusting frame 4 on the inner wall, the adjusting frame 4 is internally provided with an arc-shaped groove 5, and the adjusting frame 4 is internally provided with a flow guide assembly.

[0037] The flow guide assembly comprises a plurality of fixed shafts 6, both ends of which are fixedly connected to the inner wall of the adjusting frame 4, the outer wall of the fixed shaft 6 is rotatably connected with a flow guide plate 7, the outer wall of the flow guide plate 7 is rotatably connected with a connecting plate 8, one side of the outer wall of the connecting plate 8 is fixedly connected with an external rack 9, one side of the inner wall of the adjusting frame 4 is fixedly connected with a fixed column 10, the inside of the fixed column 10 is rotatably connected with a sleeve 14, the outer wall of the sleeve 14 is fixedly connected with a handle 11, one side of the outer wall of the handle 11 is fixedly connected with a half gear 12, the half gear 12 is meshingly connected with the outer wall of the external rack 9, and the inside of the fixed column 10 is provided with a positioning assembly; the positioning assembly comprises a positioning tooth 13, which is fixedly connected to the inner wall of the fixed column 10, one side of the inner wall of the fixed column 10 is fixedly connected with a spring 17, one end of the spring 17 is fixedly connected with a sliding rod 15, the outer wall of the sliding rod 15 is fixedly connected with a clamping tooth 16, the clamping tooth 16 is clampedly connected with the positioning tooth 13, and the outer wall of the sliding rod 15 is slidably connected to the inner wall of the sleeve 14;

[0038] Specifically, the cabinet body 1 serves as a basic framework, contains and protects the internal components, and provides stable structural support for the fume hood to resist collisions and interference that may be caused by the complex laboratory environment. The flow guide plate 2 inside the cabinet body 1 is a key "guide" for regulating the flow direction of the gas. It intercepts and guides the gas in a large area, allowing harmful gas or smoke to move along the ideal path. The limiting rod 3 fixedly connected inside the flow guide plate 2 provides a stable rotating fulcrum and precise movement limit for the adjusting frame 4, constrains the movement range of the adjusting frame 4, maintains the stability of the structure, and prevents it from shifting or shaking. The adjusting frame 4 rotatably connected to the inner wall of the flow guide plate 2 can be flexibly adjusted in angle and position. According to the direction and flow rate of the gas generated by the experiment, the posture of the adjusting frame 4 can be changed in time to better adapt to the ventilation demand. The arc-shaped slot 5 opened in the adjusting frame 4 provides reasonable space for the movement and linkage of related components, assisting in smooth operation of the internal components. The flow guide assembly inside the adjusting frame 4 is the core design. The multiple fixed shafts 6 are stably fixed at both ends of the inner wall of the adjusting frame 4, providing a reliable rotating structure for the flow guide plate 7, allowing the flow guide plate 7 to flexibly flip around the fixed shaft 6. The connecting plate 8 rotatably connected to the outer wall of the flow guide plate 7 connects the flow guide plate 7 and the external rack 9, smoothly transfers power, and realizes the coordinated action of multiple components. The external rack 9 fixedly connected to one side of the outer wall of the connecting plate 8 precisely engages with the half gear 12, thereby converting the rotation of the handle 11 into displacement and angle adjustment of the components, driving the flow guide plate 7 to flexibly change the angle and guide the gas flow as needed. The fixed column 10 fixedly connected to one side of the inner wall of the adjusting frame 4 provides a stable mounting base for components such as the sleeve 14 and the handle 11. The sleeve 14 rotatably connected inside the fixed column 10 serves as a rotating carrier for the handle 11, reducing the rotating friction and ensuring smooth operation. The handle 11 fixedly connected to the outer wall of the sleeve 14 is convenient for the operator to grasp and apply force, making it easy to control the flow guide assembly. The half gear 12 fixedly connected to one side of the outer wall of the handle 11 serves as a transmission "hub" that converts the rotating action into linear motion through engagement with the external rack 9, precisely controls the posture of the flow guide plate 7, and the positioning assembly inside the fixed column 10 is used to lock the position of the components. The positioning teeth 13 are fixedly connected to the inner wall of the fixed column 10 and are engaged with the clamping teeth 16, firmly locking the positions of the sleeve 14 and the handle 11, ensuring that the flow guide plate 7 maintains the set angle and allows the gas to be stably guided along the intended flow direction. The spring 17 fixedly connected to one end of the fixed column 10 provides elastic support for the sliding rod 15. The sliding rod 15 fixedly connected to one end of the spring 17 carries the clamping teeth 16 and enables them to slide flexibly. The clamping teeth 16 fixedly connected to the outer wall of the sliding rod 15 precisely engage and separate from the positioning teeth 13, easily unlocking and locking the components during operation, meeting the dual requirements of dynamic adjustment and fixation. The sliding rod 15 is slidably connected to the inner wall of the sleeve 14, maintaining the smoothness and stability of the component linkage.

[0039] Reference Figure 5 - Figure 8The inner wall top of the cabinet body 1 is fixedly connected with left-right symmetrical guide rails 18, the inner wall of the flow guide plate 2 is slidably connected to the outer wall of the guide rail 18, the inside of the cabinet body 1 is slidably connected with a mounting plate 22, the inside of the cabinet body 1 is mounted with a limiting assembly, and the outer wall of the mounting plate 22 is mounted with a fixing assembly on one side; the limiting assembly comprises a fixed rod 19, both ends of the fixed rod 19 are fixedly connected to the inner wall of the cabinet body 1, the outer wall of the fixed rod 19 is rotatably connected with an L-shaped plate 20, the upper surface of the L-shaped plate 20 is fixedly connected with a resisting block 21, and the outer wall of the resisting block 21 is abutted on one side of the outer wall of the mounting plate 22; the fixing assembly comprises a plug rod 23, one end of the plug rod 23 is fixedly connected to one side of the outer wall of the mounting plate 22, the inside of the plug rod 23 is slidably connected with a spring 24, one end of the spring 24 is fixedly connected with a convex block 25, and the outer wall of the plug rod 23 is slidably connected with a mounting rod 26; the outer wall of the limiting rod 3 is slidably connected to the inner wall of the arc-shaped groove 5, and the limiting rod 3 is used for limiting the movement of the arc-shaped groove 5; one end of the mounting rod 26 is fixedly connected to one side of the outer wall of the flow guide plate 2, and the flow guide plate 2 is used for fixing the mounting rod 26; the outer wall of the convex block 25 penetrates through the plug rod 23 and is slidably connected to the inside of the mounting rod 26, and the convex block 25 is used for fixing the mounting rod 26;

[0040] Specifically, the left and right symmetrical guide rails 18 fixedly connected to the top of the inner wall of the cabinet body 1 provide a precise and stable sliding track for the guide plate 2, allowing the guide plate 2 to move freely along the guide rail 18, thereby flexibly adjusting its position in the cabinet body 1 to adapt to the needs of different experimental stages for ventilation and flow layout, improving the versatility of the equipment. The mounting plate 22 slidably connected inside the cabinet body 1 is an important carrier for bearing and fixing other key components, facilitating the mounting of ventilation and flow-related elements as needed, and facilitating equipment assembly, maintenance, and component replacement; The limiting assembly installed inside the cabinet body 1 is responsible for controlling the movement range and stopping position of the mounting plate 22. The fixed rod 19 in the limiting assembly is stably fixed at both ends inside the inner wall of the cabinet body 1, providing a stable rotating fulcrum for the L-shaped plate 20, ensuring stable and reliable action of the L-shaped plate 20; The L-shaped plate 20 is rotatably connected to the outer wall of the fixed rod 19, and relies on its structure and rotating characteristics to precisely abut or release the mounting plate 22 through the linkage of the abutting block 21, limiting the displacement of the mounting plate 22 as needed; When the abutting block 21 fixed on the upper surface of the L-shaped plate 20 tightly abuts the outer wall of one side of the mounting plate 22, it can strongly lock the mounting plate 22, maintaining its predetermined height and position, preventing displacement due to vibration or accidental touching. The fixed assembly on one side of the outer wall of the mounting plate 22 is used to reinforce the connection between components. The plug rod 23 in the fixed assembly is fixed at one end to one side of the outer wall of the mounting plate 22, providing an installation framework for subsequent components; The spring 24 slidably connected inside the plug rod 23 provides an outward thrust force for the protrusion 25 using its own elastic force, maintaining the locking state under normal conditions; The protrusion 25 fixed at one end of the spring 24 has an outer wall that penetrates the plug rod 23 and is slidably connected inside the mounting rod 26. The protrusion 25 tightly clamps the mounting rod 26, allowing the mounting rod 26 and the plug rod 23 to be stably connected, ensuring that the guide plate 2 and other components are securely installed and avoiding loosening during operation. The limiting rod 3 is slidably connected to the inner wall of the arc-shaped groove 5. The limiting rod 3 controls the movement trajectory and amplitude of the arc-shaped groove 5 throughout the process, preventing the arc-shaped groove 5 from deviating or mispositioning during adjustment and operation, and maintaining the stable action of the adjustment frame 4 and associated components. The mounting rod 26 is fixedly connected to one side of the outer wall of the guide plate 2. The mounting rod 26 serves as a reliable support and connection link for the guide plate 2, allowing the guide plate 2 to be stably fixed and resist the impact of ventilation airflow. The protrusion 25 has an outer wall that penetrates the plug rod 23 and is slidably connected inside the mounting rod 26. The protrusion 25 plays a key locking function, allowing the mounting rod 26 and the plug rod 23 to be tightly connected without gaps, ensuring the stability of the entire structure.

[0041] Working principle: when the flow guide support is needed to be installed, first, the flow guide plate 2 is installed in the cabinet body 1 through the guide rail 18, at this time, the handheld mounting plate 22 is slid into the cabinet body 1, at this time, the mounting plate 22 is abutted on the L-shaped plate 20, at this time, the L-shaped plate 20 is rotated by the movement of the mounting plate 22, so that the abutment block 21 is abutted on the outer wall of the mounting plate 22 to be fixed, at this time, the plug rod 23 is inserted into the mounting rod 26 by the movement of the mounting plate 22, at this time, the convex block 25 is clamped into the mounting rod 26 by the reaction force of the spring 24 to realize the effect of quick installation.

[0042] Secondly, when the flow guide support needs to be adjusted, at this time, the sliding rod 15 is slid into the sleeve 14 by pressing the handle 11, at this time, the sliding rod 15 is moved, so that the clamping teeth 16 are slid in the fixed column 10, at this time, the sliding rod 15 is moved, so that the spring 17 is compressed, at this time, the handle 11 is rotated, so that the half gear 12 is engaged with the external rack 9 to rotate, thereby realizing the effect of adjusting the connecting plate 8, at this time, the connecting plate 8 is moved, so that the flow guide plate 7 is rotated on the outer wall of the fixed shaft 6, at this time, the flow guide plate 7 is rotated, thereby realizing the effect of adjusting the height of the harmful gas and realizing the effect of quickly guiding the harmful gas according to the position of the harmful gas, after the adjustment is completed, the sliding rod 15 is loosened, so that the spring 17 pushes the sliding rod 15 to slide, thereby realizing the effect of clamping the clamping teeth 16 into the positioning teeth 13 to be fixed and limited, at the same time, the adjustment frame 4 is rotated, so that the arc-shaped groove 5 is limited to slide along the limiting rod 3, thereby realizing the effect of further fine-tuning according to the position of the harmful gas.

[0043] Finally, it should be pointed out that: the above-mentioned is only the preferred embodiment of the present application, and is not used to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application, should be included in the protection scope of the present application.

Claims

1. A fume hood airflow guide bracket, comprising a cabinet body (1), characterized in that: The cabinet (1) is equipped with a flow guide plate (2), and a limit rod (3) is fixedly connected inside the flow guide plate (2). An adjustment frame (4) is rotatably connected to the inner wall of the flow guide plate (2). An arc groove (5) is opened inside the adjustment frame (4). A flow guide component is installed inside the adjustment frame (4). The flow guiding assembly includes multiple fixed shafts (6), both ends of which are fixedly connected to the inner wall of the adjusting frame (4). A flow guiding plate (7) is rotatably connected to the outer wall of the fixed shaft (6), and a connecting plate (8) is rotatably connected to the outer wall of the flow guiding plate (7). An external rack (9) is fixedly connected to one side of the outer wall of the connecting plate (8). A fixed column (10) is fixedly connected to one side of the inner wall of the adjusting frame (4). A sleeve (14) is rotatably connected inside the fixed column (10). A handle (11) is fixedly connected to the outer wall of the sleeve (14). A half gear (12) is fixedly connected to one side of the outer wall of the handle (11). The half gear (12) meshes with the outer wall of the external rack (9). A positioning assembly is installed inside the fixed column (10).

2. The fume hood airflow guide bracket according to claim 1, characterized in that: The positioning component includes a positioning tooth (13), which is fixedly connected to the inner wall of the fixed column (10). A spring (17) is fixedly connected to one side of the inner wall of the fixed column (10). A sliding rod (15) is fixedly connected to one end of the spring (17). A locking tooth (16) is fixedly connected to the outer wall of the sliding rod (15). The locking tooth (16) engages with the positioning tooth (13). The outer wall of the sliding rod (15) is slidably connected to the inner wall of the sleeve (14).

3. The fume hood airflow guide bracket according to claim 2, characterized in that: The cabinet (1) has a symmetrical guide rail (18) fixedly connected to the top of its inner wall. The inner wall of the guide plate (2) is slidably connected to the outer wall of the guide rail (18). The cabinet (1) has a mounting plate (22) slidably connected inside. The cabinet (1) has a limit component installed inside. The mounting plate (22) has a fixing component installed on one side of its outer wall.

4. A fume hood airflow guide bracket according to claim 3, characterized in that: The limiting component includes a fixing rod (19), both ends of which are fixedly connected to the inner wall of the cabinet (1). An L-shaped plate (20) is rotatably connected to the outer wall of the fixing rod (19). An abutment block (21) is fixedly connected to the upper surface of the L-shaped plate (20). One side of the outer wall of the abutment block (21) abuts against one side of the outer wall of the mounting plate (22).

5. A fume hood airflow guide bracket according to claim 4, characterized in that: The fixing component includes a plug rod (23), one end of which is fixedly connected to one side of the outer wall of the mounting plate (22). A second spring (24) is slidably connected inside the plug rod (23). A protrusion (25) is fixedly connected to one end of the second spring (24). An installation rod (26) is slidably connected to the outer wall of the plug rod (23).

6. The fume hood airflow guide bracket according to claim 1, characterized in that: The outer wall of the limiting rod (3) is slidably connected to the inner wall of the arc groove (5), and the limiting rod (3) is used to limit the movement of the arc groove (5).

7. A fume hood airflow guide bracket according to claim 5, characterized in that: One end of the mounting rod (26) is fixedly connected to one side of the outer wall of the guide plate (2), and the guide plate (2) is used to fix the mounting rod (26).

8. A fume hood airflow guide bracket according to claim 5, characterized in that: The outer wall of the protrusion (25) passes through the insertion rod (23) and is slidably connected inside the mounting rod (26). The protrusion (25) is used to fix the mounting rod (26).

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