CN201723546U

CN201723546U - Fixing screw

Info

Publication number: CN201723546U
Application number: CN2010202378074U
Authority: CN
Inventors: 章傅杰; 徐�明; 程红华
Original assignee: NINGBO PARTNER POWDER COATINGS CO Ltd
Current assignee: NINGBO PARTNER POWDER COATINGS CO Ltd
Priority date: 2010-06-22
Filing date: 2010-06-22
Publication date: 2011-01-26
Anticipated expiration: 2020-06-22

Abstract

The utility model relates to a fixing screw which comprises a screw stem (1) and a stem head (2), wherein, the diameter of the stem head (2) is 30mm to 40mm and the thickness thereof is 3mm to 7mm. The stem head (2) is cylindrical. The top end of the stem head (2) is fixed with a device for inserting disassembling stick. The fixing screw of the utility model has the advantages of large stressed area, good sealing effect of devices connected, improved finished product rate and convenient disassembly.

Description

Retaining screw

Technical field:

The utility model relates to fastener areas, especially a kind of retaining screw that is used on the powder coating Vertical Mill cyclone device.

Background technique:

At present, on powder coating Vertical Mill equipment, cyclone device generally adopts retaining screw to be connected with pipeline.

As depicted in figs. 1 and 2, this retaining screw is made of screw rod 1 that is connected as a single entity and bar head 2, and bar head 2 is a hexagonal bar head.The thickness (t) of this hexagonal bar head is 10mm, and the circumscribed circle diameter (D) of hexagonal bar head is 15mm.

During use, utilize spanner that the screw rod of retaining screw is screwed in the tapped hole that is preset on cyclone device postbrachium and the pipeline and fastening, can realize being connected of cyclone device and pipeline.

Though the retaining screw of the type can link together cyclone device and pipeline, but because the size of the circumscribed circle diameter of the bar head of retaining screw is less relatively, lifting surface area is little, cyclone device and pipeline are fit together closely, sealing effect is bad, outer gas stream might enter pipeline, and cyclone device is caused interference, influences the yield rate of product (powder coating).Secondly because the thickness of the bar head of retaining screw is thicker relatively, the dismounting inconvenience.

The model utility content:

The technical problems to be solved in the utility model is: provides a kind of lifting surface area big, makes the device good sealing effect of connection, and then improve the finished product rate, and the retaining screw of easy accessibility.

For solving the problems of the technologies described above, the utility model adopts a kind of like this retaining screw: it comprises screw rod and bar head, and the diameter of described bar head is 30～40mm, and the thickness of described bar head is 3～7mm.

After adopting above structure, the utility model compared with prior art, have the following advantages: the bar head diameter of retaining screw is 30～40mm, the circumscribed circle diameter of the hexagonal bar head of relative prior art, size increases relatively, lifting surface area increases greatly thus, when connecting cyclone device and pipeline with this retaining screw, the connection part (chassis) and the pipeline of cyclone device are fit together closely, sealing effect strengthens greatly, prevented that effectively outer gas stream from entering pipeline, avoided outer gas stream to disturb cyclone device, improved the yield rate of product (powder coating).Secondly, because the bar head thickness of retaining screw is 3～7mm, the hexagonal bar head thickness of relative prior art, size reduces, and dismounting is convenient.

As preferably, the diameter of described bar head is 35mm, and the thickness of described bar head is 5mm, adopts the lifting surface area of bar head of this size the most suitable, and cyclone device and pipeline can link together closely, and sealing effect is best.

As preferably, described bar head is the cylindrical bar head, and the cylindrical bar head is easy to process.

As improvement, because the top of bar head is fixed with the device that is inserted in for the dismounting rod, this device is fixed on the central authorities on the top of bar head, this device is the arc rod iron of the short straight section of a two ends band, this arc rod iron is fixed on the top of bar head through short straight section, and is as long as the dismounting rod is nested in the arcuate socket of arc rod iron and the formation of bar crown end and rotates the dismounting rod and just retaining screw can be screwed in the default tapped hole continuously, very easy during dismounting, speed is fast, the efficient height.

Description of drawings:

Fig. 1 is the main TV structure schematic representation of the retaining screw of prior art.

Fig. 2 is that the A of Fig. 1 is to structural representation.

Fig. 3 is the main TV structure schematic representation of retaining screw of the present utility model.

Fig. 4 is the axle side structure schematic representation of the retaining screw of Fig. 3.

Fig. 5 is the main TV structure schematic representation of another kind of retaining screw of the present utility model.

Fig. 6 is the axle side structure schematic representation of the retaining screw of Fig. 5.

Shown in the figure: 1, screw rod, 2, the bar head, 3, the arc rod iron, 3.1, short straight section, 4, fixed plate, 4.1, through hole.

Embodiment:

The utility model is described in further detail below in conjunction with the drawings and specific embodiments.

As shown in Figure 3 and Figure 4, a kind of retaining screw of the present utility model, it is made of screw rod 1 that is connected as a single entity and bar head 2, and this bar head 2 is the cylindrical bar head, and the diameter of bar head 2 (D) can be 30～40mm, and the thickness of bar head 2 (t) can be 3～7mm.

On powder coating Vertical Mill equipment, utilize the retaining screw of the type just cyclone device and pipeline closely can be linked together, sealing effect strengthens greatly, has prevented that effectively outer gas stream from entering pipeline, avoid outer gas stream to disturb cyclone device, improved the yield rate of product (powder coating).And consider the size of the connection part (chassis) of cyclone device, and adopting bar head diameter is 35mm, and bar head thickness is that the retaining screw of 5mm is the most suitable, and this moment, lifting surface area was also suitable.Because the excessive edge that then can exceed the connection part (chassis) of cyclone device of bar head diameter causes discontinuity, there is production safety hidden danger.And bar head diameter is too small, and then lifting surface area is not enough, and sealing effect is not good.The bar head is too thick in addition, then dismounting inconvenience, too thin then easy deformation.

In addition, the dismounting of retaining screw for convenience, as shown in Figure 3 and Figure 4, the central authorities on the top of the bar head 2 of this retaining screw are provided with the device that is inserted in for the dismounting rod.This device is an arc rod iron 3, is fixed on the top of bar head 2 for the ease of arc rod iron 3, and the two ends of this arc rod iron 3 also are provided with the short straight section 3.1 that is connected as a single entity with it, and this weak point straight section 3.1 is welded on the top of bar head 2.The top of arc rod iron 3 and bar head 2 just forms and is convenient to the arcuate socket that the dismounting rod is inserted in thus.As long as be inserted in the dismounting rod in this arcuate socket and rotate the dismounting rod and just retaining screw can be screwed in the tapped hole that is preset in connected element continuously, speed is very fast during dismounting, and efficient is higher.

Certainly, as shown in Figure 5 and Figure 6, the device that is inserted in for the dismounting rod can also be a fixed plate 4, and this fixed plate 4 is provided with the through hole 4.1 that is inserted in for the dismounting rod.

Below only just the utility model embodiment's optimum scheme is described, but can not be interpreted as it is restriction claim.The utility model not only is confined to above embodiment, and its concrete structure allows multiple variation, as long as the variation in these claims is all within protection domain of the present utility model.

Claims

1. retaining screw, it comprises screw rod (1) and bar head (2), it is characterized in that: the diameter of described bar head (2) is 30～40mm, the thickness of described bar head (2) is 3～7mm.

2. retaining screw according to claim 1 is characterized in that: the diameter of described bar head (2) is 35mm, and the thickness of described bar head (2) is 5mm.

3. retaining screw according to claim 2 is characterized in that: described bar head (2) is the cylindrical bar head.

4. retaining screw according to claim 3 is characterized in that: the top of described bar head (2) is fixed with the device that is inserted in for the dismounting rod.

5. retaining screw according to claim 4 is characterized in that: described device is fixed on the central authorities on the top of bar head (2).

6. retaining screw according to claim 5 is characterized in that: described device is the arc rod iron (3) of a short straight section of two ends band (3.1), and this arc rod iron (3) is fixed on the top of bar head (2) through short straight section (3.1).