CN2044443U - Tubular pneumatic core with external aeration - Google Patents

Abstract

The utility model relates to an improvement of a present tubular pneumatic core with internal aeration, comprising a main air pipe, an aeration pipe, a pneumatic piston, a sealed cap, an air valve, a piston rod and a plurality of sealing rings. The utility model is characterized in that the aeration pipe is attached on the main air pipe in the welding mode. The mode of the external aeration is adopted for working. The tubular pneumatic core with the external aeration has the advantage that the diameter of the aeration pipe is far smaller than the main air pipe. The utility model has the advantages of low cost, easy manufacturing, convenient maintenance and good tightness. The requirement of the resistance to pressure can be ensured easily. The material selection is convenient. Meanwhile, the volume of the pneumatic core is reduced. The tubular pneumatic core with external aeration is an ideal pneumatic core which is extensively applied and is helpful to occupy the market.

Description

Tubular pneumatic core with external aeration

The utility model relates to a kind of Pneumatic actuator, especially for making high-grade furniture, and the pneumatic movement of regulating as free lifting such as sofa, swivel chair and backrest angle of a kind of tubulose.

Now, the pneumatic movement of ventilation tubulose in the pneumatic movement that uses in the domestic and international high-grade furniture all belongs to.Main structure, main tracheae is contained in the scavenge trunk, and sealing cover is equipped with at the two ends of pipe, and pneumatic piston is contained in the main tracheae, and main tracheae is divided into upper gas chamber and lower air chamber two-part.Upper gas chamber and lower air chamber all are filled with pressurized gas, two chambeies have pressure reduction, scavenge trunk is communicated with by pore with main tracheae, pore is close lower air chamber bottom on main tracheae, the piston rod that links to each other with pneumatic piston is through lower air chamber, outside the sealing cover protruded tube, and with sealing cover movingly, valve is contained in the upper gas chamber top seal and covers, by valve switch, air chamber, seal ring is formed, and seal ring is contained in the air chamber two ends, and valve switch passes air chamber and seal ring, and be contained on the sealing cover by air chamber, valve switch and air chamber, sealing cover has air flue to communicate with air chamber movingly, and scavenge trunk communicates with air flue, open when valve, scavenge trunk passes through air flue, air chamber is communicated with upper gas chamber.Because this pneumatic movement utilizes the gap between main tracheae and the scavenge trunk to take a breath, to making the little and scavenge trunk of two pipe diameter differences must be greater than main tracheae, although the structure beautiful shape of this pipe-in-pipe, easy to use, but it is to the requirement of withstand voltage height of tubing, materials are many, and cost is big, and maintenance difficult is unfavorable for the extensive use of this interior pneumatic movement of ventilation tubulose.

The purpose of this utility model is at above-mentioned deficiency, to propose the motor-driven movement of a kind of outer ventilation tubulose.

Technical solution of the present utility model is, by main tracheae, scavenge trunk, sealing cover, pneumatic piston, piston rod, valve and seal ring are formed, main tracheae two ends are equipped with sealing cover and seal ring respectively, pneumatic piston is contained in the main tracheae, main tracheae is divided into upper gas chamber and lower air chamber, the piston rod that links to each other with pneumatic piston is contained on the sealing cover through lower air chamber, itself and sealing cover are movingly, valve is contained on the sealing cover of upper gas chamber top, valve is by valve switch, air chamber, seal ring constitutes, seal ring is contained in the air chamber two ends, air chamber is fixed in the sealing cover by the air chamber cover that air gap is arranged, and valve switch passes air chamber and seal ring, air chamber cover and sealing cover movingly, the air flue on sealing cover communicates with air chamber, scavenge trunk communicates with lower air chamber and air flue, last lower air chamber is filled with gas, and pressure reduction is arranged, and it is characterized in that, scavenge trunk is attached on the main tracheae, and weldering connects.The size of scavenge trunk is less than main tracheae.

Advantage of the present utility model is, scavenge trunk postpone, and diameter can dwindle greatly, and wall thickness also reduces thereupon, and requirement of withstand voltage guarantees easily, thereby makes its selection convenience, easy processing.Be convenient to install, and be convenient to maintenance, make the movement volume-diminished simultaneously, cost reduces, and sealing is easy to guarantee that the utility model is to the improvement of the existing pneumatic movement of tubular type, make that the pneumatic movement of outer ventilation tubulose becomes a kind of novel pneumatic movement that is worthy of popularization, help dominating the market.

Fig. 1, structural representation of the present utility model

Fig. 2, work schematic representation of the present utility model

Further describe embodiment of the present utility model below with reference to the accompanying drawings:

As shown in Figure 1 and Figure 2, concrete structure of the present utility model is, main tracheae 24 is large diameter seamless steel pipes, its two ends inwall car becomes bell mouth shape, sealing cover 12,19 is housed respectively, one small-bore seamless steel pipe directly is welded on the main tracheae 24 as scavenge trunk 10, and scavenge trunk 10 1 ends are communicated with pore 11 by pore 11 and are positioned at main tracheae 24 sealing cover 12 1 ends are housed with main tracheae 24, near on the position of sealing cover 12.The air flue 4 that has on scavenge trunk 10 the other ends and the sealing cover 19 that is contained in main tracheae 24 ends communicates, on the sealing cover 19 valve is housed, valve is by valve switch 6, air chamber 3 and seal ring 2, constitute, seal ring 2, be contained in air chamber 3 two ends respectively, air chamber 3 and seal ring 2, all be fixed in the sealing cover,, air chamber cover 5 be housed on the seal ring 2 at air chamber 3, there is air gap valve switch 6 to pass air chamber 3 and seal ring 2 on the air chamber cover 5, air chamber cover 5, and with sealing cover 19 movingly, the air flue 4 on the sealing cover 19 communicates with air chamber 3.Pneumatic piston 7 is contained in the main tracheae 24, main tracheae 24 is divided into upper gas chamber 21 and lower air chamber 23, two chambeies all are filled with gas, and pressure reduction is arranged.Stud with seal ring 8 on the pneumatic piston 7, piston rod 9 is fixedlyed connected with pneumatic piston 7, is threaded or rivets and all can., be threaded herein, install seal ring 22 additional, the piston rod that is connected with pneumatic piston 79 passes sealing cover 12 through lower air chambers 23, seal ring 13 and with they movingly.One gland 1 that is enclosed within on the valve switch 6 is being arranged on the sealing cover 19, studding with seal ring 18 in gland 1 and sealing cover 19 contact position, gland 1 outer rim is inwardly turned over rivet clasp by main tracheae 24 mouths of pipe and is decided.There are being liner 15 and gland 14 to be enclosed within on the piston rod 9 on the sealing cover 12, liner 15 is pasting piston rod 9, it is fixing with gland 14 that main tracheae 24 mouths of pipe inwardly turn over riveting, studs with seal ring 25 at gland 14 outer walls, to guarantee the sealing of main tracheae 24, sealing cover 12,19, liner 15 is by the ABS engineering plastics, or the polyethylene material making, and attachment hole 16 is arranged on valve switch 6, at gland 1 fixed groove 17 of having got on the bus, the end outside piston rod 9 is exposed at main tracheae 24 is drilled with fixed hole 26.The diameter of scavenge trunk 10 can be selected ∮ 4mm, and the seamless steel pipe of wall thickness 1.0～1.5mm (or copper pipe) is made, and main tracheae 24 selects the seamless steel pipe of ∮ 25mm to make, and scavenge trunk, main tracheae also can be selected withstand voltage satisfactory other metal pipe for use.The weight of the pneumatic movement of outer ventilation shape pipe is compared with the pneumatic movement of interior ventilation tubulose of specification of the same race and is reduced manyly, and the former has only 0.5kg heavy, and the latter reaches 1.2Kg, and total cost has reduced by 50%.

After the utility model is filled with the gas of rated pressure, can load, when opening valve, pneumatic movement is behind the pressure that is subjected to more than the 30Kg, pneumatic piston 9 will move along main tracheae 24 inwalls, compression is filled in the pressurized gas in the upper gas chamber 21, force the air chamber 3 of pressurized gas from the process valve of upper gas chamber 21 tops, air flue 4 enters scavenge trunk 10 and enters into lower air chamber 23 from scavenge trunk 10 the other ends through air passing hole 11 again, external force disappears, when valve is still opened, the high pressure air of the pressurized in the upper gas chamber 21 is known from experience makes pneumatic piston 7 reversing motions (being return), and this is because upper gas chamber 21 and lower air chamber 23 body of inflating exist the cause of pressure reduction, if when external force is exerted pressure to pneumatic movement, do not start valve, then pneumatic movement is failure to actuate, and makes furniture keep constant height, and valve switch has played the effect of regulating pneumatic movement height.

Claims (4)

1, the pneumatic movement of a kind of outer ventilation tubulose, by main tracheae 24, sealing cover 12,19, pneumatic piston rod 7, valve and some seal rings are formed, sealing cover 12 is equipped with at main tracheae 24 two ends respectively, 19 and seal ring 20,13, pneumatic piston 7 is contained in the main tracheae 24, main tracheae 24 is divided into upper gas chamber 21 and lower air chamber 23, the piston rod 9 that links to each other with pneumatic piston 7 is contained on the sealing cover 12 through lower air chamber 23, and with sealing cover 12 movingly, valve is contained on the sealing cover 19 of upper gas chamber 21 tops, valve is by valve switch 6, air chamber 3, seal ring 2 constitutes, seal ring 2, be contained in air chamber 3 two ends respectively, the air chamber cover 5 of crossing that air chamber 3 is connected with air gap is fixed in the sealing cover 19, valve switch 6 passes air chamber 3 and seal ring 2, air chamber cover 5, with sealing cover 19 movingly, air flue 4 on sealing cover 19 communicates with air chamber 3, scavenge trunk 10 communicates with lower air chamber 23 and air flue 4, upper gas chamber 21 is filled with gas with lower air chamber 23, pressure reduction is arranged, it is characterized in that, scavenge trunk 1 attached being welded on the main tracheae 24, the size of scavenge trunk 10 is less than main tracheae 24.

2, the pneumatic movement of a kind of outer ventilation tubulose according to claim 1 is characterized in that, main tracheae 24 two ends inwalls become horn-like.

3, the pneumatic movement of a kind of outer ventilation tubulose according to claim 1 is characterized in that, sealing cover 12,19 is that ABS engineering plastics or polyethylene material are made.

4, the pneumatic movement of a kind of outer ventilation tubulose according to claim 1 is characterized in that, scavenge trunk adopts internal diameter 4mm, the seamless steel pipe of wall thickness 1.0～1.5mm.