Connecting device for air suction cover

Abstract

The utility model relates to a connecting device for a suspended hood, which comprises a connecting pipe unit, a buffer unit and a joint unit, and the buffer unit is removably arranged in the connecting pipe unit. The connecting rod has the advantages that compared with an existing integrally-formed connecting rod, the connecting pipe unit and the buffering unit are detachably connected, the problem that a new connecting device is replaced due to the fact that the buffering unit is damaged is avoided, only the buffering unit needs to be replaced, and the production cost is greatly reduced; compared with an existing integrally-formed connecting rod, under the same cost, a combination of one connecting pipe unit and a plurality of buffering units and a combination of a plurality of connecting pipe units and a plurality of buffering units can be formed, and the technical effect of a longer service cycle (life cycle) is achieved; in the same service cycle, a combination of one connecting pipe unit and a plurality of buffer units can be formed, and the technical effect of lower production cost is achieved.

Description

Technical Field

[0001] This utility model relates to the field of parts processing machinery, and in particular to a connecting device for a suction hood. Background Technology

[0002] In the steel processing industry, controlling the splashing of metal scrap during core processes such as cutting, welding, and grinding remains a crucial issue for process optimization. To address this, integrated adsorption and recovery systems are commonly installed around processing equipment. These systems utilize the coordinated operation of a suction hood, connecting rods, ductwork, and recovery structure. Leveraging the negative pressure airflow generated by the ductwork, the metal scrap generated during processing is sequentially guided through the suction hood and connecting rods into the recovery structure, achieving targeted collection and centralized processing of the scrap.

[0003] The existing connecting rod adopts a composite structure design of outer and inner tubes. Although different materials are used for the two to meet different working conditions, they are still manufactured through a one-piece molding process. However, this seemingly reasonable design has a hidden structural defect: when the inner tube needs to be replaced due to long-term wear and tear from metal scraps, the rigid connection of the one-piece molding means that the worn inner tube cannot be disassembled and replaced separately, and the entire connecting rod assembly must be replaced.

[0004] A thorough analysis of the failure mechanism reveals that, carried by the negative pressure airflow, the sharp edges of metal scraps erode the inner wall of the inner tube at high speed. This continuous mechanical wear causes the inner tube to wear out at a rate several times faster than the outer tube. In high-intensity, long-term industrial production environments, the inner tube often reaches its wear limit within a short period, while the outer tube maintains its structural integrity. This maintenance dilemma of "partial failure, overall replacement" not only results in a significant waste of material resources but also significantly increases equipment operation and maintenance costs, becoming a key bottleneck restricting the efficient operation of the adsorption and recovery system.

[0005] Currently, no effective solution has been proposed for the problems in related technologies, such as the high cost caused by the need to replace the entire connecting rod. Utility Model Content

[0006] The purpose of this utility model is to address the shortcomings of the existing technology by providing a connecting device for a suction hood, thereby solving problems such as the high cost caused by the need to replace the entire connecting rod in related technologies.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A connecting device for a suction hood, comprising:

[0009] Connecting pipe unit for connection to the suction hood;

[0010] A buffer unit, which is removably disposed inside the connecting pipe unit, is used to protect the connecting pipe unit;

[0011] The connector unit has a first end that passes through the connecting pipe unit and the buffer unit in sequence and is located inside the buffer unit, and a second end that is located outside the connecting pipe unit and is used to connect to the air duct.

[0012] In some embodiments, the first end of the buffer unit protrudes beyond the first end of the connecting pipe unit, while the second end of the buffer unit does not protrude beyond the second end of the connecting pipe unit.

[0013] In some embodiments, the connecting pipe unit includes:

[0014] The first connecting tube element is a straight tube, and the buffer unit is removably disposed inside the first connecting tube element;

[0015] The second connecting pipe element is a bend, the first end of the second connecting pipe element is connected to the second end of the first connecting pipe element, and the buffer unit is removably provided inside the second connecting pipe element;

[0016] The third connecting tube element is a straight tube, and its first end is connected to the second end of the second connecting tube element. The buffer unit is removably disposed inside the third connecting tube element.

[0017] A first interface element is disposed through the side wall of the third connecting tube element, and the first interface element is detachably connected to the connector unit;

[0018] A limiting element is provided on the outside of the first connecting tube element.

[0019] In some embodiments, the first interface element and the first connecting tube element are coaxially arranged.

[0020] In some of these embodiments, the first end of the buffer unit protrudes beyond the first end of the first connecting tube element.

[0021] In some embodiments, the second end of the buffer unit does not protrude beyond the second end of the third connecting tube element.

[0022] In some embodiments, the buffer unit includes:

[0023] A first buffer element is removably disposed inside the connecting pipe unit;

[0024] A second buffer element is removably disposed inside the connecting tube unit, and a first end of the second buffer element is connected to a second end of the first buffer element;

[0025] A third buffer element is removably disposed inside the connecting tube unit, and a first end of the third buffer element is connected to a second end of the second buffer element;

[0026] The second interface element extends through the side wall of the third buffer element and is detachably connected to the connector unit.

[0027] In some embodiments, the second interface element is coaxially arranged with the first buffer element.

[0028] In some of these embodiments, the first end of the first buffer element protrudes beyond the first end of the connecting tube unit.

[0029] In some embodiments, the second end of the third buffer element does not protrude beyond the second end of the connecting tube unit.

[0030] In some embodiments, the connector unit includes:

[0031] A connector element, wherein the first end of the connector element passes sequentially through the connecting pipe unit and the buffer unit and is located inside the buffer unit, and the second end of the connector element is located outside the connecting pipe unit;

[0032] A connecting element is disposed at the second end of the connector element and is used to connect to the duct.

[0033] In some of these embodiments, the connecting pipe unit is made of steel or aluminum.

[0034] In some of these embodiments, the buffer unit is made of abrasion-resistant black silicone.

[0035] In some of these embodiments, the connector unit is made of steel or aluminum.

[0036] In some of these embodiments, it also includes:

[0037] A connecting sleeve unit, wherein the first end of the connecting sleeve unit is located inside the second end of the buffer unit, and the second end of the connecting sleeve unit is located outside the second end of the connecting tube unit.

[0038] In some of these embodiments, the connecting sleeve unit is made of steel.

[0039] The present invention adopts the above technical solution and has the following technical effects compared with the prior art:

[0040] This utility model discloses a connecting device for an air suction hood. Compared with existing one-piece molded connecting rods, this application provides a detachable connection between the connecting pipe unit and the buffer unit, avoiding the need to replace the connecting device due to damage to the buffer unit. Only the buffer unit needs to be replaced, greatly reducing production costs. The first end of the buffer unit protrudes from the first end of the connecting pipe unit, improving the protection effect on the first end of the connecting pipe unit, greatly delaying wear of the connecting pipe unit, and increasing its service life. The buffer unit is made of wear-resistant silicone material, which has good wear resistance and long service life. Compared with existing one-piece molded connecting rods, at the same cost, it can form a combination of one connecting pipe unit and multiple buffer units, or multiple connecting pipe units and multiple buffer units, achieving a longer service life. At the same service life, it can form a combination of one connecting pipe unit and multiple buffer units, achieving a lower production cost. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of a connection device according to an embodiment of the present utility model;

[0042] Figure 2 This is an exploded view of the connecting device according to an embodiment of the present utility model;

[0043] Figure 3 This is a cross-sectional view of the connecting device according to an embodiment of the present utility model;

[0044] Figure 4 This is a schematic diagram of a connecting pipe unit according to an embodiment of the present utility model;

[0045] Figure 5 This is a cross-sectional view of the connecting pipe unit according to an embodiment of the present utility model;

[0046] Figure 6 This is a schematic diagram of a buffer unit according to an embodiment of the present utility model;

[0047] Figure 7 This is a cross-sectional view of the buffer unit according to an embodiment of the present utility model;

[0048] Figure 8 This is a schematic diagram of a connector unit according to an embodiment of the present utility model;

[0049] Figure 9 This is a cross-sectional view of the connector unit according to an embodiment of the present utility model.

[0050] The reference numerals in the accompanying drawings are as follows: 100, connecting pipe unit; 101, first connecting pipe element; 102, second connecting pipe element; 103, third connecting pipe element; 104, first interface element; 105, limiting element;

[0051] 200. Buffer unit; 201. First buffer element; 202. Second buffer element; 203. Third buffer element; 204. Second interface element;

[0052] 300. Connector unit; 301. Connector element; 302. Connecting element;

[0053] 400. Connecting sleeve unit. Detailed Implementation

[0054] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0055] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other.

[0056] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0057] An illustrative embodiment of this utility model, such as Figures 1-3 As shown, a connecting device for an air suction hood includes a connecting pipe unit 100, a buffer unit 200, and a connector unit 300. The connecting pipe unit 100 is used to connect to the air suction hood; the buffer unit 200 is removably disposed inside the connecting pipe unit 100 to protect the connecting pipe unit 100; the first end of the connector unit 300 passes sequentially through the connecting pipe unit 100 and the buffer unit 200 and is located inside the buffer unit 200, while the second end of the connector unit 300 is located outside the connecting pipe unit 100 and is used to connect to an air duct.

[0058] In this invention, the outer wall of the buffer unit 200 is closely attached to the inner wall of the connecting pipe unit 100.

[0059] In some embodiments, the first end of the buffer unit 200 protrudes beyond the first end of the connecting tube unit 100, while the second end of the buffer unit 200 does not protrude beyond the second end of the connecting tube unit 100.

[0060] In some of these embodiments, the connecting tube unit 100 is made of steel or aluminum.

[0061] In some of these embodiments, the buffer unit 200 is made of abrasion-resistant black silicone.

[0062] In some of these embodiments, the connector unit 300 is made of steel or aluminum.

[0063] The method of using this utility model is as follows:

[0064] (I) Installation

[0065] Select a buffer unit 200 of appropriate specifications, place the buffer unit 200 inside the connecting tube unit 100, and make the outer wall of the buffer unit 200 fit tightly against the inner wall of the connecting tube unit 100.

[0066] The first end of the connector unit 300 is passed through the connecting pipe unit 100 and the buffer unit 200 in sequence and is located inside the buffer unit 200. The second end of the connector unit 300 is connected to the air duct.

[0067] (II) Maintenance

[0068] If the buffer unit 200 is damaged to the point of needing replacement, separate the connecting pipe unit 100 from the suction hood, and separate the connector unit 300 from the buffer unit 200 and the connecting pipe unit 100.

[0069] Remove the buffer unit 200 from the inside of the connecting tube unit 100;

[0070] Place the new buffer unit 200 inside the connecting tube unit 100, and make the outer wall of the buffer unit 200 fit tightly against the inner wall of the connecting tube unit 100;

[0071] The first end of the connector unit 300 passes through the connecting pipe unit 100 and the buffer unit 200 in sequence and is located inside the buffer unit 200, connecting the second end of the connector unit 300 to the air duct.

[0072] like Figures 4-5As shown, the connecting pipe unit 100 includes a first connecting pipe element 101, a second connecting pipe element 102, a third connecting pipe element 103, a first interface element 104, and a limiting element 105. The first connecting pipe element 101 is a straight pipe, and a buffer unit 200 is removably disposed inside the first connecting pipe element 101. The second connecting pipe element 102 is a bent pipe, with its first end connected to the second end of the first connecting pipe element 101, and the buffer unit 200 is removably disposed inside the second connecting pipe element 102. The third connecting pipe element 103 is a straight pipe, with its first end connected to the second end of the second connecting pipe element 102, and the buffer unit 200 is removably disposed inside the third connecting pipe element 103. The first interface element 104 penetrates the side wall of the third connecting pipe element 103 and is detachably connected to the connector unit 300. The limiting element 105 is disposed on the outside of the first connecting pipe element 101.

[0073] In some of these embodiments, the first end of the buffer unit 200 protrudes from the first end of the first connecting tube element 101.

[0074] In some embodiments, the first connecting tube element 101 is made of steel or aluminum. For example, it may be made of spring steel or seamless steel tubing.

[0075] In some of these embodiments, the outer diameter of the second end of the first connecting tube element 101 is larger than the outer diameter of the first end of the first connecting tube element 101.

[0076] In some of these embodiments, the length of the second end of the first connecting tube element 101 is greater than the length of the first end of the first connecting tube element 101.

[0077] In some of these embodiments, the outer diameter of the first end of the first connecting tube element 101 is 47.5 mm and the outer diameter of the second end is 50 mm.

[0078] In some of these embodiments, the inner diameter of the first connecting tube element 101 is 44 mm.

[0079] In some of these embodiments, the length of the first connecting tube element 101 is 134 mm.

[0080] In some of these embodiments, the length of the first end of the first connecting tube element 101 is 35 mm and the length of the second end is 94 mm.

[0081] In some of these embodiments, the first connecting pipe element 101 is a first straight pipe.

[0082] The second connecting tube element 102 is fixedly connected to the first connecting tube element 101, for example, by integral molding or welding.

[0083] In some embodiments, the second connecting pipe element 102 is made of steel or aluminum. For example, it is made of spring steel or seamless steel pipe.

[0084] The dimensions of the second connecting tube element 102 are matched with the dimensions of the first connecting tube element 101. Generally, the outer diameter of the second connecting tube element 102 is equal to the outer diameter of the second end of the first connecting tube element 101, and the inner diameter of the second connecting tube element 102 is equal to the inner diameter of the first connecting tube element 101.

[0085] In some of these embodiments, the second connecting tube element 102 has an outer diameter of 50 mm and an inner diameter of 44 mm.

[0086] In some embodiments, the second connecting tube element 102 is part of a virtual ring. The virtual ring has an outer diameter of 75 mm and an inner diameter of 25 mm.

[0087] In some of these embodiments, the central angle α1 of the second connecting tube element 102 is an acute angle.

[0088] In some of these embodiments, the central angle α1 of the second connecting tube element 102 is 15° to 75°.

[0089] In some of these embodiments, the central angle α1 of the second connecting tube element 102 is 20° to 65°.

[0090] In some of these embodiments, the central angle α1 of the second connecting tube element 102 is 25° to 55°.

[0091] In some of these embodiments, the central angle α1 of the second connecting tube element 102 is 30° to 45°.

[0092] In some of these embodiments, the central angle α1 of the second connecting tube element 102 is 35° to 40°.

[0093] In some of these embodiments, the central angle α1 of the second connecting tube element 102 is 35°.

[0094] In some of these embodiments, the second connecting pipe element 102 is a bend.

[0095] In some of these embodiments, the second end of the buffer unit 200 does not protrude beyond the second end of the third connecting tube element 103.

[0096] The third connecting tube element 103 is fixedly connected to the second connecting tube element 102, for example, by integral molding or welding.

[0097] In some embodiments, the third connecting tube element 103 is made of steel or aluminum. For example, it may be made of spring steel or seamless steel tubing.

[0098] The dimensions of the third connecting pipe element 103 are matched with the dimensions of the second connecting pipe element 102. Generally, the outer diameter of the third connecting pipe element 103 is equal to the outer diameter of the second connecting pipe element 102, and the inner diameter of the third connecting pipe element 103 is equal to the inner diameter of the second connecting pipe element 102.

[0099] In some of these embodiments, the third connecting tube element 103 has an outer diameter of 50 mm and an inner diameter of 44 mm.

[0100] In some of these embodiments, the length of the third connecting tube element 103 is 84 mm.

[0101] In some of these embodiments, the angle α2 formed by the third connecting tube element 103 and the first connecting tube element 101 is an obtuse angle.

[0102] In some of these embodiments, the angle α2 formed by the third connecting tube element 103 and the first connecting tube element 101 is 105° to 165°.

[0103] In some of these embodiments, the angle α2 formed by the third connecting tube element 103 and the first connecting tube element 101 is 115° to 160°.

[0104] In some of these embodiments, the angle α2 formed by the third connecting tube element 103 and the first connecting tube element 101 is 125° to 155°.

[0105] In some of these embodiments, the angle α2 formed by the third connecting tube element 103 and the first connecting tube element 101 is 135° to 150°.

[0106] In some of these embodiments, the angle α2 formed by the third connecting tube element 103 and the first connecting tube element 101 is 140° to 145°.

[0107] In some of these embodiments, the angle α2 formed by the third connecting tube element 103 and the first connecting tube element 101 is 145°.

[0108] In some of these embodiments, the third connecting pipe element 103 is a second straight pipe.

[0109] In some of these embodiments, the first interface element 104 is coaxially arranged with the first connecting tube element 101.

[0110] In some embodiments, the radial dimension of the first interface element 104 is 8 mm. Specifically, a mold with a diameter of 8 mm is used, which enters from the central axis of the first connecting tube element 101 and penetrates the side wall of the third connecting tube element 103.

[0111] In some of these embodiments, the first interface element 104 is a first interface.

[0112] The limiting element 105 is fixedly connected to the first connecting tube element 101, for example, by integral molding or welding.

[0113] In some embodiments, the connection position between the limiting element 105 and the first connecting tube element 101 (the side of the limiting element 105 near the second end of the first connecting tube element 101) is chamfered.

[0114] In some of these embodiments, the chamfer is 0.5 mm.

[0115] The dimensions of the limiting element 105 are matched with the dimensions of the first connecting tube element 101. Generally, the outer diameter of the limiting element 105 is larger than the outer diameter of the first connecting tube element 101.

[0116] In some of these embodiments, the limiting element 105 has an outer diameter of 56 mm and an inner diameter of 47.5 mm.

[0117] In some of these embodiments, the thickness of the limiting element 105 is 5 mm.

[0118] In some of these embodiments, the limiting element 105 includes, but is not limited to, a limiting ring, a limiting baffle, etc.

[0119] like Figures 6-7 As shown, the buffer unit 200 includes a first buffer element 201, a second buffer element 202, a third buffer element 203, and a second interface element 204. The first buffer element 201 is removably disposed inside the connecting tube unit 100; the second buffer element 202 is removably disposed inside the connecting tube unit 100, with its first end connected to the second end of the first buffer element 201; the third buffer element 203 is removably disposed inside the connecting tube unit 100, with its first end connected to the second end of the second buffer element 202; and the second interface element 204 penetrates the sidewall of the third buffer element 203 and is detachably connected to the connector unit 300.

[0120] Specifically, the first buffer element 201 is removably disposed inside the first connecting tube element 101; the second buffer element 202 is removably disposed inside the second connecting tube element 102; the third buffer element 203 is removably disposed inside the third connecting tube element 103; and the second interface element 204 corresponds to the first interface element 104.

[0121] In some of these embodiments, the first end of the first buffer element 201 protrudes from the first end of the first connecting tube element 101.

[0122] In some of these embodiments, the first buffer element 201 is made of abrasion-resistant black silicone.

[0123] The dimensions of the first buffer element 201 are matched with the dimensions of the first connecting tube element 101. Generally, the outer diameter of the first buffer element 201 is not greater than the inner diameter of the first connecting tube element 101, and the length of the first buffer element 201 is not less than the length of the first connecting tube element 101.

[0124] In some of these embodiments, the first buffer element 201 has an outer diameter of 43 mm and an inner diameter of 35 mm.

[0125] In some of these embodiments, the length of the first buffer element 201 is 144 mm.

[0126] In some of these embodiments, the first buffer element 201 is a first silicone sleeve.

[0127] The second buffer element 202 is fixedly connected to the first buffer element 201, for example, by integral molding.

[0128] In some of these embodiments, the second buffer element 202 is made of abrasion-resistant black silicone.

[0129] The dimensions of the second buffer element 202 are matched with the dimensions of the first buffer element 201. Generally, the outer diameter of the second buffer element 202 is equal to the outer diameter of the first buffer element 201, and the inner diameter of the second buffer element 202 is equal to the inner diameter of the first buffer element 201.

[0130] The dimensions of the second buffer element 202 are matched with the dimensions of the second connecting tube element 102. Generally, the outer diameter of the second buffer element 202 is not greater than the inner diameter of the second connecting tube element 102.

[0131] In some of these embodiments, the second buffer element 202 has an outer diameter of 43 mm and an inner diameter of 35 mm.

[0132] In some embodiments, the second buffer element 202 is part of a virtual ring. The virtual ring has an outer diameter of 71.5 mm and an inner diameter of 28.5 mm.

[0133] In some of these embodiments, the central angle β1 of the second buffer element 202 is an acute angle.

[0134] In some of these embodiments, the central angle β1 of the second buffer element 202 is 15° to 75°.

[0135] In some of these embodiments, the central angle β1 of the second buffer element 202 is 20° to 65°.

[0136] In some of these embodiments, the central angle β1 of the second buffer element 202 is 25° to 55°.

[0137] In some of these embodiments, the central angle β1 of the second buffer element 202 is 30° to 45°.

[0138] In some of these embodiments, the central angle β1 of the second buffer element 202 is 35° to 40°.

[0139] In some of these embodiments, the central angle β1 of the second buffer element 202 is 35°.

[0140] In some of these embodiments, the second buffer element 202 is a second silicone sleeve.

[0141] In some of these embodiments, the second end of the third buffer element 203 does not protrude beyond the second end of the third connecting tube element 103.

[0142] The third buffer element 203 is fixedly connected to the second buffer element 202, for example, by integral molding.

[0143] In some of these embodiments, the third buffer element 203 is made of abrasion-resistant black silicone.

[0144] The dimensions of the third buffer element 203 are matched with the dimensions of the second buffer element 202. Generally, the outer diameter of the third buffer element 203 is equal to the outer diameter of the second buffer element 202, and the inner diameter of the third buffer element 203 is equal to the inner diameter of the second buffer element 202.

[0145] The dimensions of the third buffer element 203 are matched with the dimensions of the third connecting tube element 103. Generally, the outer diameter of the third buffer element 203 is not greater than the inner diameter of the third connecting tube element 103, and the length of the third buffer element 203 is equal to the length of the third connecting tube element 103.

[0146] In some of these embodiments, the third buffer element 203 has an outer diameter of 43 mm and an inner diameter of 35 mm.

[0147] In some of these embodiments, the length of the third buffer element 203 is 84 mm.

[0148] In some of these embodiments, the angle β2 formed by the third buffer element 203 and the first buffer element 201 is an obtuse angle.

[0149] In some of these embodiments, the angle β2 formed by the third buffer element 203 and the first buffer element 201 is 105° to 165°.

[0150] In some of these embodiments, the angle β2 formed by the third buffer element 203 and the first buffer element 201 is 115° to 160°.

[0151] In some of these embodiments, the angle β2 formed by the third buffer element 203 and the first buffer element 201 is 125° to 155°.

[0152] In some of these embodiments, the angle β2 formed by the third buffer element 203 and the first buffer element 201 is 135° to 150°.

[0153] In some of these embodiments, the angle β2 formed by the third buffer element 203 and the first buffer element 201 is 140° to 145°.

[0154] In some of these embodiments, the angle β2 formed by the third buffer element 203 and the first buffer element 201 is 145°.

[0155] In some of these embodiments, the third buffer element 203 is a third silicone sleeve.

[0156] In some of these embodiments, the second interface element 204 is coaxially arranged with the first buffer element 201.

[0157] The dimensions of the second interface element 204 are matched with the dimensions of the first interface element 104. Generally, the radial dimension of the second interface element 204 is equal to the radial dimension of the first interface element 104.

[0158] In some embodiments, the radial dimension of the second interface element 204 is 8 mm. Specifically, a mold with a diameter of 8 mm is used, which enters from the central axis of the first buffer element 201 and penetrates the sidewall of the third buffer element 203.

[0159] In some of these embodiments, the second interface element 204 is a second interface.

[0160] like Figures 8-9As shown, the connector unit 300 includes a connector element 301 and a connecting element 302. The first end of the connector element 301 passes through the connecting pipe unit 100 and the buffer unit 200 in sequence and is located inside the buffer unit 200. The second end of the connector element 301 is located outside the connecting pipe unit 100. The connecting element 302 is disposed at the second end of the connector element 301 and is used to connect to the air duct.

[0161] Specifically, the first end of the connector element 301 passes through the first interface element 104 and the second interface element 204 in sequence and is located inside the third buffer element 203, while the second end of the connector element 301 is located outside the third connecting tube element 103.

[0162] In some embodiments, the connector element 301 is made of steel or aluminum. For example, it is made of seamless steel tubing.

[0163] The dimensions of connector element 301 are matched with the dimensions of first interface element 104 (second interface element 204). Generally, the radial dimension (diameter) of connector element 301 is equal to the radial dimension of first interface element 104 (second interface element 204), and the length of connector element 301 is greater than the depth of first interface element 104 (second interface element 204).

[0164] In some of these embodiments, the diameter of the connector element 301 is 8 mm.

[0165] In some of these embodiments, the connector element 301 is a duct connector.

[0166] The connecting element 302 is fixedly connected to the connector element 301, for example, by integral molding.

[0167] In some of these embodiments, the connecting element 302 includes, but is not limited to, threads.

[0168] Furthermore, the connecting device also includes a connecting sleeve unit 400. The first end of the connecting sleeve unit 400 is located inside the second end of the buffer unit 200, and the second end of the connecting sleeve unit 400 is located outside the second end of the connecting tube unit 100.

[0169] Specifically, the first end of the connecting sleeve unit 400 is located inside the second end of the third buffer element 203, and the second end of the connecting sleeve unit 400 is located outside the second end of the third connecting tube element 103.

[0170] The dimensions of the connecting sleeve unit 400 are matched with the dimensions of the third buffer element 203. Generally, the outer diameter of the connecting sleeve unit 400 is not greater than the inner diameter of the third buffer element 203.

[0171] In some of these embodiments, the outer diameter of the connecting sleeve unit 400 is 35 mm and the inner diameter is 33 mm.

[0172] In some of these embodiments, the length of the connecting sleeve unit 400 is 70 mm.

[0173] In some embodiments, the connecting sleeve unit 400 is made of steel. For example, it is machined from a seamless stainless steel pipe.

[0174] In some of these embodiments, the connecting sleeve unit 400 is a stainless steel connecting sleeve.

[0175] The method of using this utility model is as follows:

[0176] (I) Installation

[0177] Select a buffer unit 200 of appropriate specifications, place the buffer unit 200 inside the connecting tube unit 100, and make the outer wall of the buffer unit 200 fit tightly against the inner wall of the connecting tube unit 100.

[0178] The first end of the connector element 301 passes through the first interface element 104 and the second interface element 204 in sequence and is located inside the third buffer element 203. The second end of the connector element 301 is connected to the air duct through the connecting element 302.

[0179] Connect the first connecting pipe element 101 and the connecting sleeve unit 400 to the suction hood respectively;

[0180] (II) Maintenance

[0181] If the buffer unit 200 is damaged to the point of needing replacement, the first connecting pipe element 101, the connecting sleeve unit 400 and the suction hood are separated, and the connector element 301 is separated from the first interface element 104 and the second interface element 204.

[0182] Remove the buffer unit 200 from the inside of the connecting tube unit 100;

[0183] Place the new buffer unit 200 inside the connecting tube unit 100, and make the outer wall of the buffer unit 200 fit tightly against the inner wall of the connecting tube unit 100;

[0184] The first end of the connector element 301 passes through the first interface element 104 and the second interface element 204 in sequence and is located inside the third buffer element 203. The second end of the connector element 301 is connected to the air duct through the connecting element 302.

[0185] The technical effects of this utility model are as follows:

[0186] 1) Compared with the existing one-piece molded connecting rod, this application makes the connecting tube unit and the buffer unit detachable, avoiding the problem of replacing the new connecting device due to damage to the buffer unit. Only the buffer unit needs to be replaced, which greatly reduces the production cost.

[0187] 2) The first end of the buffer unit protrudes from the first end of the connecting pipe unit, which improves the protection effect on the first end of the connecting pipe unit, greatly delays the wear of the connecting pipe unit, and increases the service life of the connecting pipe unit.

[0188] 3) The buffer unit is made of wear-resistant silicone material, which has good wear resistance and long service life. Compared with the existing one-piece molded connecting rod, at the same cost, it can form a combination of one connecting tube unit and multiple buffer units, or multiple connecting tube units and multiple buffer units, to achieve a longer service life. At the same service life, it can form a combination of one connecting tube unit and multiple buffer units to achieve a lower production cost.

[0189] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model. Those skilled in the art should realize that all solutions obtained by equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A connection device for a suction hood, characterized in that include: Connecting pipe unit for connection to the suction hood; A buffer unit, which is removably disposed inside the connecting pipe unit, is used to protect the connecting pipe unit; The connector unit has a first end that passes through the connecting pipe unit and the buffer unit in sequence and is located inside the buffer unit, and a second end that is located outside the connecting pipe unit and is used to connect to the air duct.

2. The connection device according to claim 1, characterized in that The first end of the buffer unit protrudes from the first end of the connecting pipe unit, while the second end of the buffer unit does not protrude from the second end of the connecting pipe unit.

3. The connection device of claim 1, wherein The connecting pipe unit includes: The first connecting tube element is a straight tube, and the buffer unit is removably disposed inside the first connecting tube element; The second connecting pipe element is a bend, the first end of the second connecting pipe element is connected to the second end of the first connecting pipe element, and the buffer unit is removably provided inside the second connecting pipe element; The third connecting tube element is a straight tube, and its first end is connected to the second end of the second connecting tube element. The buffer unit is removably disposed inside the third connecting tube element. A first interface element is disposed through the side wall of the third connecting tube element, and the first interface element is detachably connected to the connector unit; A limiting element is provided on the outside of the first connecting tube element.

4. The connection device according to claim 3, characterized in that The first interface element and the first connecting tube element are coaxially arranged; and / or The first end of the buffer unit protrudes from the first end of the first connecting tube element; and / or The second end of the buffer unit does not protrude beyond the second end of the third connecting tube element.

5. The connection device of claim 1, wherein The buffer unit includes: A first buffer element is removably disposed inside the connecting pipe unit; A second buffer element is removably disposed inside the connecting tube unit, and a first end of the second buffer element is connected to a second end of the first buffer element; A third buffer element is removably disposed inside the connecting tube unit, and a first end of the third buffer element is connected to a second end of the second buffer element; The second interface element extends through the side wall of the third buffer element and is detachably connected to the connector unit.

6. The connection device according to claim 5, characterized in that The second interface element is coaxially arranged with the first buffer element; and / or The first end of the first buffer element protrudes from the first end of the connecting tube unit; and / or The second end of the third buffer element does not protrude beyond the second end of the connecting pipe unit.

7. The connection device of claim 1, wherein The connector unit includes: A connector element, wherein the first end of the connector element passes sequentially through the connecting pipe unit and the buffer unit and is located inside the buffer unit, and the second end of the connector element is located outside the connecting pipe unit; A connecting element is disposed at the second end of the connector element and is used to connect to the duct.

8. The connection device of claim 1, wherein The connecting pipe unit is made of steel or aluminum; and / or The buffer unit is made of wear-resistant black silicone; and / or The connector unit is made of steel or aluminum.

9. The connection device according to any one of claims 1 to 8, characterized in that Also includes: A connecting sleeve unit, wherein the first end of the connecting sleeve unit is located inside the second end of the buffer unit, and the second end of the connecting sleeve unit is located outside the second end of the connecting tube unit.

10. The connection device according to claim 9, characterized in that The connecting sleeve unit is made of steel.

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