CN2931844Y

CN2931844Y - Improved foam pump

Info

Publication number: CN2931844Y
Application number: CN 200620053700
Authority: CN
Inventors: 林添大
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-01-13
Filing date: 2006-01-13
Publication date: 2007-08-08
Anticipated expiration: 2016-01-13

Abstract

The utility model discloses an improved foam pump, comprising a blind nut, a cylinder body, a press button, a big piston, a small piston, a needle column, a mesh, a one-way valve and a spring. This utility model is characterized in that the small piston's top interferingly fit he string of the big piston's ring groove which is provided with a plurality of radial through-holes and covered by a T-shaped washer which interferingly fit the internal ring groove's external rampart. The external ring broad of the small piston fit the inner ring plate of the air cylinder. A gas valve consists of the external ring plate's axial hole of the big piston and a valve element which fits the external ring's broad. An auxiliary column is equipped inside the hydraulic cylinder and the spring is arranged at the chassis of the auxiliary column and at the shoulder of the small piston. The needle column is arranged in the inner chamber of the auxiliary column. The top of the needle inverted column cone plate fits the inverted taper plate of the small piston. Thereby the present utility model can not only effectively prevent the liquid from getting into the air cylinder, but also maintain constant spraying liquid function, and maintain good foam.

Description

Improved foam pump

Technical field

The utility model relates to a kind of foam pump, especially a kind of push type foam pump.

Background technique

Present a kind of foam pump of prior art, comprise blind nut, cylinder body, head, big piston, small piston, pin post, grid, one-way valve and spring, spray orifice is arranged in the head, the hydrojet passage, cylinder body is made of cylinder, fluid cylinder, head is installed in the center hole of blind nut, and the top of cylinder body is installed in the annular groove of blind nut; Grid is installed in the hydrojet passage of head, the top of big piston and hydrojet passage are fixedly connected, and its top and grid are fixedly connected, and the shoulder at big piston top cooperates with the lower end of hydrojet passage, the lower end of big piston cooperates with cylinder, and the urceolus of outer shroud boss and head is fixed; Existing problems: the radial hole that communicates with cylinder on the small piston, in foam pump ejection process or when finishing, there is liquid to enter the cylinder air cavity, can reduce the cylinder air cavity like this has volume, causes function reduction, and the liquid spray volume is little, and spumescence is poor.

Summary of the invention

The purpose of this utility model is: a kind of improved foam pump is provided, and it can not only prevent effectively that liquid from entering cylinder, and can keep constant hydrojet function, keeps good foam.

The utility model is achieved in that a kind of improved foam pump comprises blind nut, cylinder body, head, big piston, small piston, pin post, grid, one-way valve and spring, spray orifice is arranged in the head, the hydrojet passage, cylinder body is made of cylinder, fluid cylinder, head is installed in the center hole of blind nut, and the top of cylinder body is installed in the annular groove of blind nut; Grid is installed in the hydrojet passage of head, the top of big piston and hydrojet passage are fixedly connected, and its top and grid are fixedly connected, and the shoulder at big piston top cooperates with the lower end of hydrojet passage, the lower end of big piston cooperates with cylinder, and the urceolus of outer shroud boss and head is fixed; Its special way is: there are several radial direction through hole on the top of small piston, and the "T"-shaped pad valve core housing of class is at the small piston top, the muscle interference fit in the top of small piston and the big piston inner groove, the external annulus interference fit of pad spool and inner groove; The outer shroud of small piston cooperates with the interior ring-type platform of cylinder along plate, and the axial bore on the outer shroud platform of a spool and big piston constitutes air valve, and spool cooperates along plate with outer shroud; Subpost is installed in the fluid cylinder, radial hole is arranged at the subpost bottom, and spring one end is installed on the chassis of subpost, and the other end of spring cooperates with shoulder in the small piston, the lower end of pin post has guide ring to cooperate with the subpost inner chamber, and the upper end of the pin post taper type of falling the post cooperates with small piston rounding taper type ring.

Described improved foam pump, its special way is: described one-way valve is made of the rounding taper type liquid entering hole, the glass marble that are positioned at the cylinder body lower end.

The improved foam pump of the utility model, there are several radial direction through hole on the top of small piston, and radial direction through hole communicates with cylinder, and the "T"-shaped pad valve core housing of class is installed in the inner groove of big piston at the small piston top; The outer shroud of small piston cooperates with ring-type platform in the fluid cylinder along plate, and the axial bore on the outer shroud platform of spool and big piston constitutes air valve, and spool cooperates along plate with outer shroud; Because adopt such structure, on time, spool is closed axial bore under head, the "T"-shaped pad spool of class is opened the radial direction through hole on small piston top; Under the normal state, when spraying by head, the "T"-shaped pad spool of class is closed the radial direction through hole on small piston top, and spool is opened axial bore; During hydrojet, spool is closed axial bore, and the "T"-shaped pad spool of class is opened the radial direction through hole on small piston top.Prevented that liquid enters cylinder by the radial direction through hole on small piston top in the process of spray foam.So the utility model can not only prevent effectively that liquid from entering in the cylinder, and can keep constant hydrojet function, keep good foam.

Description of drawings

Fig. 1 is the sectional view of the improved foam pump head of the utility model when pressing.

Fig. 2 is the sectional view of the improved foam pump of the utility model.

Embodiment

Below in conjunction with accompanying drawing the utility model is further described.

As shown in Figure 1 and Figure 2, a kind of improved foam pump comprises blind nut 2, cylinder body 12, head 1, big piston 6, small piston 7, pin post 9, Netcom 3, one-way valve and spring 10, and cylinder body 12 is made of cylinder 1201, fluid cylinder 1202.Spray orifice 101 is arranged in the head 1, and hydrojet path 10 2, head 1 are installed in the center hole 201 of blind nut 2, and the top of cylinder body 12 is installed in the annular groove 202 of blind nut 2; Netcom 2 is installed in the hydrojet path 10 2 of head 1, the top of big piston 6 and hydrojet path 10 2 interference fit are fixedly connected, the top of hydrojet path 10 2 and Netcom 2 are fixedly connected, the shoulder 601 at big piston 6 tops cooperates with the lower end of hydrojet path 10 2, the lower end of big piston 6 cooperates with cylinder 1201, and the outer shroud boss 602 of big piston 6 lumens is fixedly connected with the urceolus 103 of head 1; There are several radial direction through hole 701 on the top of small piston 7, and the "T"-shaped pad spool 5 of class is enclosed within small piston 7 tops, muscle 606 interference fit in the top periphery of small piston 7 and big piston 6 inner grooves 603, the external annulus interference fit of pad spool 5 and inner groove 603; Some muscle 606 are arranged on the external annulus of inner groove 603, constitute the gas passage between the muscle 606, the gas passage communicates with the radial direction through hole 701 of small piston 7.The outer shroud of small piston 7 cooperates with ring-type platform 1202 in the cylinder 1201 along plate 702, axial bore 605 on the outer shroud platform 604 of one spool 8 and big piston 6 constitutes air valves, the outer shroud of spool 8 cooperates with axial bore 605 along plate 801, and valve rod 802 is installed in the inner chamber 604 of outer shroud boss 602; Subpost 11 is installed in the fluid cylinder 1202, radial hole 1102 is arranged at subpost 11 bottoms, spring 10 1 ends are installed on the chassis 1101 of subpost 11, the other end of spring 10 cooperates with shoulder 704 in the small piston 7, the bottom of pin post 9 cooperates with the guide ring 1102 of subpost 11 inner chambers, and the upper end of pin post 9 taper types of falling the post 901 cooperates with small piston 6 rounding taper type rings 605; Blind nut 2 is installed on the container by a pad 4.

Described one-way valve is made of the rounding taper type liquid entering hole 1203, the glass marble 13 that are positioned at cylinder body 12 lower ends.

Claims

1, a kind of improved foam pump comprises blind nut, cylinder body, head, big piston, small piston, pin post, grid, one-way valve and spring, spray orifice is arranged in the head, the hydrojet passage, cylinder body is made of cylinder, fluid cylinder, head is installed in the center hole of blind nut, and the top of cylinder body is installed in the annular groove of blind nut; Grid is installed in the hydrojet passage of head, the top of big piston and hydrojet passage are fixedly connected, and its top and grid are fixedly connected, and the shoulder at big piston top cooperates with the lower end of hydrojet passage, the lower end of big piston cooperates with cylinder, and the urceolus of outer shroud boss and head is fixed; It is characterized in that: there are several radial direction through hole on the top of small piston, and the "T"-shaped pad valve core housing of class is at the small piston top, the muscle interference fit in the top of small piston and the big piston inner groove, the external annulus interference fit of pad spool and inner groove; The outer shroud of small piston cooperates with the interior ring-type platform of cylinder along plate, and the axial bore on the outer shroud platform of a spool and big piston constitutes air valve, and spool cooperates along plate with outer shroud; Subpost is installed in the fluid cylinder, radial hole is arranged at the subpost bottom, and spring one end is installed on the chassis of subpost, and the other end of spring cooperates with shoulder in the small piston, the lower end of pin post has guide ring to cooperate with the subpost inner chamber, and the upper end of the pin post taper type of falling the post cooperates with small piston rounding taper type ring.

2, according to the described improved foam pump of claim 1, it is characterized in that: described one-way valve is made of the rounding taper type liquid entering hole, the glass marble that are positioned at the cylinder body lower end, and glass marble is installed in the liquid entering hole.