Mechanical self-locking telescopic gas collecting hood

Abstract

A mechanical self-locking telescopic gas-collecting hood comprises an upper flange seat and a lower flange seat, a flexible air pipe is fixed between the upper flange seat and the lower flange seat, a gas-collecting hood is fixed on the lower side of the lower flange seat, and the upper flange seat is mounted at a gas inlet of a waste gas pipeline; a mechanical self-locking telescopic arm assembly is arranged between the upper flange seat and the lower flange seat, the mechanical self-locking telescopic arm assembly comprises an outer sleeve fixed in the upper flange seat and an inner sleeve fixed in the lower flange seat, and the inner sleeve is located in the outer sleeve and can slide in the direction of the outer sleeve; a locking plate is rotationally arranged in the outer sleeve; a first locking hole and a second locking hole are respectively formed in the same side surfaces of the inner sleeve and the outer sleeve; when the inner sleeve slides, one end of the locking plate extends into the first locking hole and the second locking hole, at the moment, a locking state is formed, and the position of the inner sleeve is limited and fixed.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas treatment, in particular to a mechanical self-locking telescopic gas collecting hood. Background Art

[0002] Industrial production processes generate a variety of pollutants, including waste gas, dust, and harmful gases. To control the spread of these pollutants and protect the environment and worker health, fume hoods were developed. In the early days of industrial production, due to insufficient attention to environmental protection and occupational health, many production processes lacked effective waste gas collection measures. This resulted in pollutants being directly discharged into the atmosphere, causing serious environmental pollution and harm to workers. With increasing environmental awareness and the continuous improvement of relevant regulations, the requirements for industrial waste gas emissions have become increasingly stringent. As a key means of waste gas collection, fume hoods have also undergone continuous development and improvement. Traditional fume hood designs are relatively simple and often cannot adapt well to complex production conditions and diverse pollutant emission characteristics, resulting in low collection efficiency. Modern fume hood technology, however, combines principles of fluid mechanics and aerodynamics to significantly improve collection efficiency by optimizing the hood's shape, size, installation position, and airflow organization.

[0003] The lifting structure of the gas hood is of great significance in practical applications. It can flexibly adjust the height and position of the gas hood according to different working conditions.

[0004] Common types of gas hood lifting structures include:

[0005] Electric push rod lifting structure and hydraulic lifting structure, but these lifting structures have the following disadvantages:

[0006] Relatively high cost: The price of the electric linear actuator itself and the supporting control system are relatively high, which increases the overall investment in the equipment.

[0007] High maintenance requirements: Electric linear actuators have many precision parts and require regular maintenance and servicing to ensure their normal operation, which may increase maintenance costs and time.

[0008] High reliance on power supply stability: If the power supply fluctuates or is interrupted, it may affect its normal operation.

[0009] The hydraulic system may leak: Leakage of hydraulic oil will cause environmental pollution, and regular inspection and maintenance of seals are required.

[0010] Relatively slow response speed: In situations where rapid lifting and lowering are required, the hydraulic system may not respond in a timely manner.

[0011] Temperature sensitivity of hydraulic oil: Oil temperatures that are too high or too low may affect the performance and stability of the system. Utility Model Content

[0012] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a mechanical self-locking telescopic air collecting hood, thereby solving the above-mentioned defects.

[0013] The purpose of this utility model is achieved through the following technical solutions:

[0014] A mechanical self-locking telescopic gas collecting hood, comprising an upper flange seat and a lower flange seat, a flexible air duct is fixed between the upper and lower flange seats, a gas collecting hood is fixed on the lower side of the lower flange seat, and the upper flange seat is installed at the air inlet of the exhaust pipe;

[0015] A mechanical self-locking telescopic arm assembly is provided between the upper flange seat and the lower flange seat, and the mechanical self-locking telescopic arm assembly includes an outer sleeve fixed in the upper flange seat and an inner sleeve fixed in the lower flange seat, and the inner sleeve is located in the outer sleeve and can slide along the direction of the outer sleeve; a locking plate is rotatably provided in the outer sleeve, and a first locking hole and a second locking hole are respectively provided on the same side of the inner sleeve and the outer sleeve; the inner sleeve drives the locking plate to rotate when sliding, and one end of the locking plate extends into the first locking hole and the second locking hole, at this time, a locking state is formed, and the position of the inner sleeve is limited and fixed; when one end of the locking plate is not in the first locking hole and the second locking hole, an active state is formed, and the inner sleeve can slide to the limit of the longest position.

[0016] In one or more embodiments of the present invention, the outer sleeve is fixed in the upper flange seat by a fixing member, a strip hole is opened through the length direction of the inner sleeve, the fixing member passes through the strip hole, and the movement of the inner sleeve is limited by the fixing member.

[0017] In one or more embodiments of the present invention, a solid shaft is fixed in the inner sleeve, and the solid shaft is in movable contact with the locking plate. When the solid shaft and the locking plate are in contact, the locking plate rotates.

[0018] In one or more embodiments of the present invention, a slot is provided on the lower side of the outer sleeve, and the position of the slot corresponds to the outer end of the solid shaft.

[0019] In one or more embodiments of the present invention, two opposite sides of the locking plate have inwardly recessed triangular grooves, and the angles of the four outwardly extending protrusions of the locking plate are all less than 85 degrees.

[0020] In one or more embodiments of the present invention, a circular shaft is fixed inside the outer sleeve, the locking plate is rotatably sleeved on the circular shaft, a limiting protrusion is provided on the circular shaft, and the locking plate is located between the two limiting protrusions; the position of the locking plate corresponds to that of the second lock hole.

[0021] In one or more embodiments of the present invention, the circular axis is located on the side of the center line of the outer sleeve.

[0022] Beneficial effects of the utility model:

[0023] The utility model proposes a mechanical self-locking telescopic air collecting hood inner sleeve, which drives the locking plate to be driven at a certain angle when sliding in the outer sleeve. When the first locking hole and the second locking hole overlap, the locking end of the locking plate extends to the inner side of the first locking hole and the second locking hole, and then the first locking hole and the second locking hole are driven to separate. During the process, the overlapping part of the first locking hole and the second locking hole will be reduced. Finally, the locking plate is locked by the overlapping part of the first locking hole and the second locking hole, so that the inner sleeve will not fall off by itself. Through the above-mentioned mechanical self-locking structure, the lifting structure has low cost, low maintenance requirements, and does not rely on power supply, and its structure is more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the utility model in a stretched state;

[0025] Figure 2 This is a schematic diagram of the structure of the utility model in a self-locking state;

[0026] Figure 3 It is a structural schematic diagram of the mechanical self-locking telescopic arm assembly in a stretched state;

[0027] Figure 4 It is a structural diagram of the mechanical self-locking telescopic arm assembly in a self-locking state;

[0028] Figure 5 Schematic diagram of the structure of the locking plate;

[0029] Figure 6 This is a diagram of the use state of the utility model;

[0030] Figure 7 It is a schematic diagram of the steps of the present invention. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the utility model for protection, but merely represents selected embodiments of the present invention. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0032] Example 1: In this embodiment, Figures 1 to 7 As shown, a mechanical self-locking telescopic air collecting hood includes an upper flange seat 1 and a lower flange seat 2. A soft air duct 3 is fixed between the upper flange seat 1 and the lower flange seat 2. The air collecting hood is fixed on the lower side of the lower flange seat 2. The upper flange seat 1 is installed at the air inlet of the exhaust pipe; a handle is fixed on the outside of the air collecting hood for the operator to operate.

[0033] A mechanical self-locking telescopic arm assembly is provided between the upper flange seat 1 and the lower flange seat 2, and the mechanical self-locking telescopic arm assembly includes an outer sleeve 4 fixed in the upper flange seat 1 and an inner sleeve 5 fixed in the lower flange seat 2, the inner sleeve 5 is located in the outer sleeve 4 and can slide along the direction of the outer sleeve 4; a locking plate 6 is rotatably provided in the outer sleeve 4, and a first locking hole and a second locking hole are respectively provided on the same side of the inner sleeve 5 and the outer sleeve 4; the inner sleeve 5 drives the locking plate 6 to rotate when sliding, and one end of the locking plate 6 extends into the first locking hole and the second locking hole, at this time a locking state is formed, and the position of the inner sleeve 5 is limited and fixed; when one end of the locking plate 6 is not in the first locking hole and the second locking hole, an active state is formed, and the inner sleeve 5 can slide to the limit of the longest position.

[0034] In this embodiment, when the inner sleeve 5 slides in the outer sleeve 4, the locking piece 6 is driven to a certain angle. When the first locking hole and the second locking hole overlap, the locking end of the locking piece 6 extends to the inner side of the first locking hole and the second locking hole, and then the first locking hole and the second locking hole are driven to separate. During the process, the overlapping part of the first locking hole and the second locking hole will be reduced. Finally, the locking piece 6 is locked by the overlapping part of the first locking hole and the second locking hole, so that the inner sleeve 5 will not fall off by itself.

[0035] In one or more embodiments of the present invention, the outer sleeve 4 is fixed in the upper flange seat 1 by a fixing member 7, a strip hole 51 is opened through the length direction of the inner sleeve 5, and the fixing member 7 passes through the strip hole 51, and the movement of the inner sleeve 5 is limited by the fixing member 7.

[0036] In this embodiment, the fixing member 7 is a bolt, which fixes the outer sleeve 4 by the bolt, and when used in conjunction with the strip hole 51, it can limit the longest stretching position of the inner sleeve 5 and the outer sleeve 4, so that the inner sleeve 5 will not fall off; the inner sleeve 5 and the lower flange seat 2 are also fixed by bolts.

[0037] In one or more embodiments of the present invention, a solid shaft 52 is fixed in the inner sleeve 5 , and the solid shaft 52 is in movable contact with the locking plate 6 . When the solid shaft 52 and the locking plate 6 are in contact, the locking plate 6 rotates.

[0038] In this embodiment, when the inner sleeve 5 slides up and down, its solid shaft 52 moves simultaneously with the inner sleeve 5 , and when the solid shaft 52 contacts the locking plate 6 , the locking plate 6 rotates a certain angle; the solid shaft is located at the lower side of the bar hole 51 .

[0039] In one or more embodiments of the present invention, a slot 41 is formed on the lower side of the outer sleeve 4 , and the position of the slot 41 corresponds to the outer end of the solid shaft 52 .

[0040] In this embodiment, the arrangement of the clamping slot 41 ensures that the outer end of the solid shaft 52 does not affect the solid shaft 52 from reaching the designated position.

[0041] In one or more embodiments of the present invention, two opposite sides of the locking piece 6 have inwardly recessed triangular grooves 61 , and the angles of the four outwardly extending protrusions of the locking piece 6 are all less than 85 degrees.

[0042] In this embodiment, the first lock hole and the second lock hole can be limited by setting the four raised corners; the angle of the triangular groove 61 is greater than ninety degrees.

[0043] In one or more embodiments of the present invention, a circular shaft is fixed inside the outer sleeve 4, and the locking plate 6 is rotatably sleeved on the circular shaft. A limiting protrusion is provided on the circular shaft, and the locking plate 6 is located between the two limiting protrusions; the locking plate 6 corresponds to the position of the second lock hole.

[0044] In one or more embodiments of the present invention, the circular axis is located on the side of the center line of the outer sleeve 4.

[0045] In this embodiment, the position of the circular shaft is not set on the center line, and its position is close to the second lock hole, so that the center of the triangular groove 61 is also offset, so that when the solid shaft 52 is upward, it first contacts the inclined surface of the triangular groove 61, which makes it easier to drive the locking plate. The offset of the circular shaft position makes it possible for any angle of the locking plate 6 to enter the first lock hole and the second lock hole after rotation.

[0046] Working principle of this utility model:

[0047] 1. The inner sleeve 5 and the outer sleeve 4 are stretched to the longest limit position so that the gas collecting hood covers the exhaust gas generating point on the production line;

[0048] 2. The operator drives the lower flange seat 2 and the inner sleeve 5 upward through the handle on the gas collecting cover until the solid shaft 52 abuts against the inclined surface of the triangular groove 61 of the locking plate 6;

[0049] 3. Continue to drive the inner sleeve 5 upward until it reaches the highest point, until the solid shaft 52 reaches the center of the triangular groove 61. At this time, the first lock hole and the second lock hole are completely overlapped, and one corner of the locking piece 6 is located in the overlapping portion;

[0050] 4. Drive the inner sleeve 5 downward, and while the overlapping portion of the first and second locking holes shrinks, the corner of the locking plate 6 is locked, forming a self-locking state. During this process, the angle of the locking plate rotates to a certain extent;

[0051] 5. Drive the inner sleeve 5 upward, and the solid shaft 52 contacts the lower end of the plane of the locking plate 6, causing the locking plate 6 to continue to rotate. When the inner sleeve 5 reaches the highest point, the plane of the locking plate 6 will limit the solid shaft 52. At this time, the two corners on the same side of the locking plate are located in the second locking hole, and the locking plate 6 is now tilted as a whole;

[0052] 6. Drive the inner sleeve 5 downward, and drive the locking plate 6 to continue to rotate through the second locking hole, so that the corner of the locking plate 6 disengages from the second locking hole and returns to the initial position, allowing the inner sleeve 5 to slide freely; after completing the above steps, the locking plate 6 rotates 360 degrees.

[0053] In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," "outer," "left," "right," and the like indicate positions or locations based on the positions shown in the accompanying drawings, or the positions or locations in which the product of the present invention is typically placed when in use, or the positions or locations commonly understood by those skilled in the art. These terms are intended solely to facilitate the description of the present invention and simplify the description, and are not intended to indicate or imply that the devices or components referred to must have a specific position, be constructed, or operate in a specific position. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and the like are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, terms such as "disposed" and "connected" should be understood broadly. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection, an indirect connection through an intermediate medium, or internal communication between two components. A person of ordinary skill in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

Claims

1. A mechanical self-locking telescopic air collecting hood, comprising an upper flange seat (1) and a lower flange seat (2), wherein a flexible air duct (3) is fixed between the upper flange seat (1) and the lower flange seat (2), and an air collecting hood is fixed on the lower side of the lower flange seat (2), wherein the upper flange seat (1) is mounted on the air inlet of the exhaust pipe, and is characterized in that: A mechanical self-locking telescopic arm assembly is provided between the upper flange seat (1) and the lower flange seat (2), and the mechanical self-locking telescopic arm assembly comprises an outer sleeve (4) fixed in the upper flange seat (1) and an inner sleeve (5) fixed in the lower flange seat (2), wherein the inner sleeve (5) is located in the outer sleeve (4) and can slide along the direction of the outer sleeve (4); a locking plate (6) is rotatably provided in the outer sleeve (4), and a first locking hole and a second locking hole are respectively provided on the same side of the inner sleeve (5) and the outer sleeve (4); when the inner sleeve (5) slides, the locking plate (6) is driven to rotate, and one end of the locking plate (6) extends into the first locking hole and the second locking hole, at which time a locking state is formed, and the position of the inner sleeve (5) is limited and fixed; when one end of the locking plate (6) is not in the first locking hole and the second locking hole, an active state is formed, and the inner sleeve (5) can slide to the limit position of the longest position.

2. The mechanical self-locking telescopic gas collecting hood according to claim 1, characterized in that: The outer sleeve (4) is fixed in the upper flange seat (1) through a fixing member (7); a strip hole (51) is provided through the length direction of the inner sleeve (5); the fixing member (7) passes through the strip hole (51); and the movement of the inner sleeve (5) is limited by the fixing member (7).

3. The mechanical self-locking telescopic gas collecting hood according to claim 1, characterized in that: A solid shaft (52) is fixed inside the inner sleeve (5), and the solid shaft (52) is in active contact with the locking plate (6). When the two are in contact, the locking plate (6) rotates.

4. The mechanical self-locking telescopic gas collecting hood according to claim 3, characterized in that: A clamping groove (41) is provided on the lower side of the outer sleeve (4), and the position of the clamping groove (41) corresponds to the outer end of the solid shaft (52).

5. The mechanical self-locking telescopic gas collecting hood according to claim 2, characterized in that: The locking plate (6) has inwardly recessed triangular grooves (61) on opposite sides, and the angles of the four outwardly extending protrusions of the locking plate (6) are all less than 85 degrees.

6. The mechanical self-locking telescopic gas collecting hood according to claim 1, characterized in that: A circular shaft is fixed in the outer sleeve (4), and the locking piece (6) is rotatably sleeved on the circular shaft. A limiting protrusion is provided on the circular shaft, and the locking piece (6) is located between two limiting protrusions; the position of the locking piece (6) corresponds to that of the second locking hole.

7. The mechanical self-locking telescopic gas collecting hood according to claim 6, characterized in that: The circular axis is located on the side of the center line of the outer sleeve (4).

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