Universal exhaust hood

Abstract

The utility model discloses a universal exhaust hood which comprises a fixed base and an exhaust hood body, the fixed base is connected with the exhaust hood body through an exhaust pipe set, the exhaust pipe set comprises a first connecting pipe, a second connecting pipe and a universal pipe, the first connecting pipe is connected with the fixed base, the second connecting pipe is connected with the exhaust hood body, and the universal pipe is connected with the exhaust hood body. The first connecting pipe, the second connecting pipe and the universal pipe are sequentially connected through the universal mechanism, the universal mechanism is used for steering of the exhaust pipe set, the first connecting pipe, the second connecting pipe and the universal pipe are sequentially connected through the universal mechanism, through the design of the universal mechanism, the angle and the direction of the exhaust pipe set can be adjusted at will, operation is simplified, and practicability is high. And the use is more convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of exhaust hoods, and in particular relates to a universal exhaust hood. Background Art

[0002] The exhaust hood is mainly used to quickly discharge small-scale dust, hot air, volatile gas, harmful gas and other small granular floating objects or gases generated in the experiment or production process. It is one of the essential safety equipment in the laboratory. In biological and chemical laboratories, people often come into direct contact with highly toxic, corrosive, flammable and explosive chemicals, often use fragile glass and porcelain utensils, and carry out intense and meticulous work in the environment of high-temperature electric heating equipment such as gas, water, and electricity. Therefore, safety work must be taken very seriously.

[0003] The prior art discloses a utility model patent named a universal exhaust hood (authorization announcement number: CN207709512U), which uses a telescopic guide tube to increase the working range of the universal exhaust hood, shortening it when the exhaust source is close and extending it when the exhaust source is far away. At the same time, it can rotate 360° to adjust the direction, ensuring that it is close to the exhaust source and thoroughly collects the exhaust gas discharged from the exhaust source.

[0004] However, the exhaust hood has the following defects: the exhaust hood ducts are connected by joint heads, and the angle and orientation are adjusted by a joint tightening knob. Each adjustment requires tightening the joint tightening knob, which makes the operation cumbersome and complicated, affecting the use. Utility Model Content

[0005] The utility model aims to solve the above-mentioned technical problems existing in the prior art and provides a universal exhaust hood, in which a first connecting pipe, a second connecting pipe and a universal pipe are sequentially connected through a universal mechanism. Through the design of the universal mechanism, the angle and orientation of the exhaust pipe group can be adjusted at will, which simplifies the operation and is more convenient to use.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A universal exhaust hood comprises a fixed base and the exhaust hood, wherein the fixed base and the exhaust hood are connected via an exhaust pipe group;

[0008] It is characterized in that: the exhaust pipe group includes a first connecting pipe, a second connecting pipe and a universal pipe, the first connecting pipe is connected to the fixed base, the second connecting pipe is connected to the exhaust hood, the first connecting pipe, the second connecting pipe and the universal pipe are connected in sequence through a universal mechanism, and the universal mechanism is used for steering the exhaust pipe group.

[0009] The first connecting pipe, the second connecting pipe and the universal pipe are connected in sequence through a universal mechanism. Through the design of the universal mechanism, the angle and orientation of the exhaust pipe group can be adjusted at will, which simplifies the operation and is more convenient to use.

[0010] Furthermore, the universal mechanism includes a first joint and a second joint, the first joint is provided with a first connecting head, the second joint is provided with a second connecting head, and the first connecting head is rotatably connected to the second connecting head.

[0011] Furthermore, an annular protrusion is provided at one end of the first connecting head, and an annular groove is provided at the end of the second connecting head corresponding to the annular protrusion. The annular protrusion is embedded in the annular groove, and the annular protrusion and the annular groove are in interference fit to realize the rotational connection between the first joint and the second joint. The friction coefficient between the first joint and the second joint is increased through the interference fit between the annular protrusion and the annular groove, so that the first joint and the second joint can stay at any angle at will, and will not cause angular rotation due to their own gravity.

[0012] Furthermore, a first flared portion is provided at the end of the first connector, and a sealing groove 1 is formed between the first flared portion and the first connector. A second flared portion is provided at the end of the second connector, and a sealing groove 2 is formed between the second flared portion and the second connector. After the first connector and the second connector are connected, sealing is achieved through the sealing groove 1 and the sealing groove 2.

[0013] Furthermore, the first joint and the second joint are both provided with pipe joints, and the exhaust pipe group is connected to the universal mechanism through the pipe joints.

[0014] Furthermore, the universal tube includes a first universal tube and a second universal tube, and the first universal tube is rotatably connected with the second universal tube via a universal mechanism.

[0015] Furthermore, the second connecting pipe is provided with an airflow regulating valve.

[0016] Furthermore, the fixed base includes a fixing part and a connecting part. The fixing part is provided with a fixing hole. The fixed base is fixed through the fixing hole. The fixed base is connected to the first connecting pipe through the connecting part. A reinforcing plate is provided between the fixing part and the connecting part. The reinforcing plate is used to increase the strength of the fixed base.

[0017] Furthermore, an exhaust port is provided at one end of the first connecting pipe connected to the fixed base.

[0018] Furthermore, the exhaust hood is provided with a fastening screw ring, and the exhaust hood is connected to the second connecting pipe through the fastening screw ring.

[0019] The utility model has the following beneficial effects due to the adoption of the above technical solution:

[0020] The utility model discloses an exhaust pipe group including a first connecting pipe, a second connecting pipe and a universal pipe. The first connecting pipe is connected to a fixed base, the second connecting pipe is connected to an exhaust hood, the first connecting pipe, the second connecting pipe and the universal pipe are connected in sequence through a universal mechanism, the universal mechanism is used for steering the exhaust pipe group, the first connecting pipe, the second connecting pipe and the universal pipe are connected in sequence through the universal mechanism, and the exhaust pipe group can be adjusted in angle and orientation at will through the design of the universal mechanism, so that the operation is simplified and the use is more convenient.

[0021] In the utility model, an annular protrusion is provided at one end of the first connecting head, and an annular groove is provided at the end of the second connecting head corresponding to the annular protrusion. The annular protrusion is embedded in the annular groove, and the annular protrusion and the annular groove are in interference fit to realize the rotational connection between the first joint and the second joint. The friction coefficient between the first joint and the second joint is increased through the interference fit between the annular protrusion and the annular groove, so that the first joint and the second joint can stay at any angle at will, and will not cause angular rotation due to their own gravity. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The utility model is further described below in conjunction with the accompanying drawings:

[0023] Figure 1 This is a structural schematic diagram of a universal exhaust hood of the utility model;

[0024] Figure 2 This is a structural schematic diagram of a universal exhaust hood of the utility model from another perspective;

[0025] Figure 3 It is a structural schematic diagram of the first joint in the utility model;

[0026] Figure 4 It is a structural schematic diagram of the second joint in the utility model;

[0027] Figure 5 It is a cross-sectional view of the first joint in the utility model;

[0028] Figure 6 It is a cross-sectional view of the second joint in the utility model;

[0029] Figure 7 For this utility model Figure 5 A partial enlarged view of the middle A;

[0030] Figure 8 For this utility model Figure 6 A partial enlarged view of point B in the middle.

[0031] In the figure: 1-fixed base; 11-fixed part; 12-connecting part; 13-fixing hole; 14-reinforcement plate; 2-exhaust hood; 3-first connecting pipe; 4-second connecting pipe; 5-universal tube; 51-first universal tube; 52-second universal tube; 6-universal mechanism; 61-first joint; 611-first connecting head; 612-annular protrusion; 613-first flaring part; 614-sealing groove one; 62-second joint; 621-second connecting head; 622-annular groove; 623-second flaring part; 624-sealing groove two; 63-pipeline joint; 7-airflow regulating valve; 8-exhaust port; 9-fastening screw ring. DETAILED DESCRIPTION

[0032] like Figures 1 to 8 As shown, the utility model is a universal exhaust hood, comprising a fixed base 1, an exhaust hood 2 and an exhaust pipe group, the fixed base 1 and the exhaust hood 2 are connected through the exhaust pipe group, the exhaust pipe group comprises a first connecting pipe 3, a second connecting pipe 4 and a universal pipe 5, the first connecting pipe 3 is connected to the fixed base 1, the second connecting pipe 4 is connected to the exhaust hood 2, the first connecting pipe 3, the second connecting pipe 4 and the universal pipe 5 are connected in sequence through a universal mechanism 6, the universal mechanism 6 is used for steering the exhaust pipe group, the first connecting pipe 3, the second connecting pipe 4 and the universal pipe 5 are connected in sequence through the universal mechanism 6, through the design of the universal mechanism 6, the exhaust pipe group can adjust the angle and orientation at will, the operation is simplified, and it is more convenient to use.

[0033] The fixed base 1 includes a fixing portion 11 and a connecting portion 12. The fixing portion 11 and the connecting portion 12 are an integral structure. The fixing portion 11 is provided with a fixing hole 13. The fixed base 1 fixes the universal exhaust hood through the fixing hole 13 in combination with bolts. The fixed base 1 is connected to the first connecting pipe 3 through the connecting portion 12. A reinforcing plate 14 is provided between the fixing portion 11 and the connecting portion 12. The reinforcing plate 14 is used to increase the strength of the fixed base 1, thereby increasing the stability of the fixation. The exhaust hood 2 is provided with a fastening screw ring 9. The exhaust hood 2 is installed on the second connecting pipe 4 through the fastening screw ring 9, thereby realizing the connection between the fixed base 1, the exhaust pipe group and the exhaust hood 2.

[0034] In this embodiment, an airflow regulating valve 7 is further provided on the second connecting pipe 4 , and the airflow regulating valve 7 is used to adjust the airflow passing through the exhaust pipe group, thereby adjusting the exhaust size of the exhaust hood 2 .

[0035] An exhaust port 8 is provided at one end of the first connecting pipe 3 connected to the fixed base 1 . The exhaust port 8 is connected to an external pipeline, and the airflow is discharged through the exhaust port 8 .

[0036] The universal mechanism 6 includes a first joint 61 and a second joint 62. The first joint 61 is provided with a first connecting head 611, and the second joint 62 is provided with a second connecting head 621. The first connecting head 611 is rotatably connected to the second connecting head 621. Specifically, an annular protrusion 612 is provided at one end of the first connecting head 611, and an annular groove 622 is provided at the end of the second connecting head 621 corresponding to the annular protrusion 612. The annular protrusion 612 is embedded in the annular groove 622, and the annular protrusion 612 and the annular groove 622 are in interference fit to achieve the rotational connection between the first joint 61 and the second joint 62. The interference fit between the annular protrusion 612 and the annular groove 622 increases the friction coefficient between the first joint 61 and the second joint 62, so that the first joint 61 and the second joint 62 can stay at any angle at will, and will not rotate at an angle due to their own gravity, thereby achieving the effect of use and stop.

[0037] A first flared portion 613 is provided at the end of the first connecting head 611, and a sealing groove 1 614 is formed between the first flared portion 613 and the first connecting head 611. A second flared portion 623 is provided at the end of the second connecting head 621, and a sealing groove 2 624 is formed between the second flared portion 623 and the second connecting head 621. After the first connecting head 611 and the second connecting head 621 are connected, the sealing groove 1 614 and the sealing groove 2 624 are combined with a sealing ring to achieve a sealing effect at the connection between the first joint 61 and the second joint 62 to avoid air leakage at the connection.

[0038] When the first joint 61 is connected to the second joint 62, the first flared portion 613 abuts against the second flared portion 623, the annular protrusion 612 is embedded in the annular groove 622, and the outer wall of the annular protrusion 612 is in interference fit with the inner wall of the annular groove 622, thereby realizing the rotational connection between the first joint 61 and the second joint 62. After the first joint 61 is connected to the second joint 62, the sealing groove 1 614 and the sealing groove 2 624 are surrounded, and the sealing ring is installed in the sealing groove 1 614 and the sealing groove 2 624, thereby realizing the sealing of the connection between the first joint 61 and the second joint 62 to avoid leakage.

[0039] The second joints 62 and 62 are both provided with pipe joints 63, and the exhaust pipe group is connected to the universal mechanism 6 through the pipe joints 63. The design of the pipe joints 63 facilitates the installation between the exhaust pipe group and the universal mechanism 6.

[0040] In this embodiment, the universal tube 5 includes a first universal tube 51 and a second universal tube 52. The first universal tube 51 is rotatably connected to the first connecting tube 3 through a universal mechanism 6. The second universal tube 52 is rotatably connected to the second connecting tube 4 through the universal mechanism 6. The first universal tube 51 and the second universal tube 52 are rotatably connected through the universal mechanism 6. There are three universal mechanisms 6 in total. By setting the universal tube 5 into two sections, the angle of the exhaust hood can be adjusted more flexibly.

[0041] The above are only specific embodiments of the utility model, but the technical features of the utility model are not limited thereto. Any simple changes, equivalent replacements or modifications made based on the utility model to solve basically the same technical problems and achieve basically the same technical effects are all included in the protection scope of the utility model.

Claims

1. A universal exhaust hood, comprising a fixed base and an exhaust hood, wherein the fixed base and the exhaust hood are connected via an exhaust pipe group; characterized in that: The exhaust pipe group includes a first connecting pipe, a second connecting pipe and a universal pipe, the first connecting pipe is connected to the fixed base, the second connecting pipe is connected to the exhaust hood, the first connecting pipe, the second connecting pipe and the universal pipe are connected in sequence through a universal mechanism, and the universal mechanism is used for steering the exhaust pipe group; the universal mechanism includes a first joint and a second joint, the first joint is provided with a first connecting head, the second joint is provided with a second connecting head, the first connecting head is rotatably connected with the second connecting head, one end of the first connecting head is provided with an annular protrusion, the end of the second connecting head corresponding to the annular protrusion is provided with an annular groove, the annular protrusion is embedded in the annular groove, and the annular protrusion and the annular groove are in interference fit to realize the rotational connection between the first joint and the second joint.

2. The universal exhaust hood according to claim 1, characterized in that: A first flared portion is provided at the end of the first connector, and a sealing groove 1 is formed between the first flared portion and the first connector. A second flared portion is provided at the end of the second connector, and a sealing groove 2 is formed between the second flared portion and the second connector. After the first connector and the second connector are connected, sealing is achieved through the sealing groove 1 and the sealing groove 2.

3. The universal exhaust hood according to claim 1, characterized in that: The second joint and the second joint are both provided with pipe joints, and the exhaust pipe group is connected to the universal mechanism through the pipe joints.

4. The universal exhaust hood according to claim 1, characterized in that: The universal tube comprises a first universal tube and a second universal tube, and the first universal tube is rotatably connected with the second universal tube through the universal mechanism.

5. The universal exhaust hood according to claim 1, characterized in that: The second connecting pipe is provided with an air flow regulating valve.

6. The universal exhaust hood according to claim 1, characterized in that: The fixed base includes a fixing part and a connecting part, the fixing part is provided with a fixing hole, the fixed base is fixed through the fixing hole, the fixed base is connected to the first connecting pipe through the connecting part, and a reinforcing plate is provided between the fixing part and the connecting part, and the reinforcing plate is used to increase the strength of the fixed base.

7. The universal exhaust hood according to claim 1, characterized in that: An exhaust port is provided at one end of the first connecting pipe connected to the fixing base.

8. The universal exhaust hood according to claim 1, characterized in that: The exhaust hood is provided with a fastening screw ring, and the exhaust hood is connected to the second connecting pipe through the fastening screw ring.

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