CN210565037U

CN210565037U - Elastic piston for concrete pump

Info

Publication number: CN210565037U
Application number: CN201921656359.9U
Authority: CN
Inventors: 孙永强; 孙士奇
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2020-05-19
Anticipated expiration: 2029-09-30

Abstract

The utility model belongs to the technical field of the elastic piston accessory, specifically say and relate to elastic piston for the concrete pump, its main technical characteristics is: including the piston body, have the sealing ring at the preceding, back both ends of piston body, establish at the piston body center and have the through-hole, be provided with the position sleeve at the periphery of through-hole, be provided with the screw rod hole on the position sleeve, the piston body includes interior piston body and outer piston body, position sleeve with interior piston body structure as an organic whole, sealing ring and outer piston body structure as an organic whole are provided with the adhesive linkage between interior piston body and the outer piston body. The inner piston body is made of a nylon material with high strength and good corrosion resistance, the outer piston body is made of a rubber material, the inner piston body and the outer piston body are vulcanized together at high temperature, the whole weight is greatly reduced, the machining process and the die are simple, the elasticity of the whole elastic piston is good, the sealing effect is good, and the strength is improved.

Description

Elastic piston for concrete pump

Technical Field

The utility model belongs to the technical field of the piston, especially, relate to elastic piston for the concrete pump.

Background

In the fields of building and bridge construction, concrete is required to be conveyed to a specified position by a concrete pump, so that the working efficiency is improved, and the construction cost is saved. The quality of the elastic piston used on the concrete pump directly influences the construction progress and the construction quality. The elastic piston used on the existing concrete pump comprises a piston body, wherein sealing rings are arranged at the front end and the rear end of the piston body, a through hole is formed in the center of the piston body, a positioning sleeve is arranged on the periphery of the through hole, and a screw hole is formed in the positioning sleeve.

For the elastic piston with small diameter and small pressure, the rubber is good in wear resistance and corrosion resistance, and is generally made of rubber materials, but the rubber materials are low in strength, so that the piston is easy to deform when the pressure is high, concrete leakage is caused, and conveying efficiency is affected.

For the elastic piston with larger diameter or the elastic piston with larger pressure, the metal core body needs to be wrapped in the rubber material, so that the strength of the piston is greatly increased, but the metal core body needs to be completely wrapped in the rubber material due to the lower wear resistance and corrosion resistance of the metal core body. The elastic piston has the following defects: firstly, the metal core body has heavy weight, and has large energy loss and much useless work in the up-down running process; secondly, the metal core body needs to be completely wrapped in the rubber material, and the processing procedure and the processing die are complex; thirdly, the metal core body has poor corrosion resistance, is easy to corrode after being exposed due to impact and the like in the using process, and has short service life.

SUMMERY OF THE UTILITY MODEL

The technical problem solved by the utility model is to provide an elastic piston for concrete pump that is sealed effectual, long service life, difficult for leaking thick liquid.

The utility model adopts the technical proposal that: including the piston body preceding, back both ends of piston body have the sealing ring, establish at the piston body center and have the through-hole the periphery of through-hole is provided with the position sleeve be provided with the screw rod hole on the position sleeve, the piston body includes interior piston body and outer piston body, the position sleeve with interior piston body structure as an organic whole, the sealing ring with outer piston body structure as an organic whole, interior piston body with be provided with the adhesive linkage between the outer piston body.

The additional technical characteristics are as follows:

a plurality of convex rings and annular grooves which are arranged at intervals are arranged on the radial outer side of the inner piston body along the axial direction, and the inner side surface of the outer piston body is matched with the radial outer side of the inner piston body;

the radial outer side of the convex ring is provided with a plurality of oblique clamping grooves along the circumferential direction of the convex ring, and the inner side of the outer piston body is matched with the radial outer side of the inner piston body.

Compared with the prior art, the utility model provides an elastic piston for concrete pump has following advantage: one of the two-way piston comprises a piston body, wherein sealing rings are arranged at the front end and the rear end of the piston body, a through hole is formed in the center of the piston body, a positioning sleeve is arranged at the periphery of the through hole, a screw hole is formed in the positioning sleeve, the piston body comprises an inner piston body and an outer piston body, the positioning sleeve and the inner piston body are of an integral structure, the sealing rings and the outer piston body are of an integral structure, an adhesive layer is arranged between the inner piston body and the outer piston body, the inner piston body is made of a nylon material with high strength and good corrosion resistance, the outer piston body is made of a rubber material, the adhesive layer is arranged between the inner piston body and the outer piston body, the inner piston body and the outer piston body are vulcanized together at high temperature, the whole weight is greatly reduced, the processing procedure and the die are simple, and the elasticity of the whole elastic piston is, the sealing effect is good, and the strength is improved; secondly, a plurality of convex rings and annular grooves which are arranged at intervals are arranged on the radial outer side of the inner piston body along the axial direction, and the inner side surface of the outer piston body is matched with the radial outer side of the inner piston body; when the elastic piston moves back and forth along the pump pipe, the outer piston body positioned on the outer side cannot be separated from the outer side of the inner piston body due to stress, and the integral tensile strength is higher; thirdly, because the radial outside of bulge loop is provided with a plurality of slant draw-in grooves along its circumferencial direction, outer piston body inboard with the radial outside phase-match of interior piston body, in order to avoid wearing and tearing because of pump line or other foreign matters to the same position of piston at the piston advance and retreat in-process, in the use, the piston need follow circumferential direction in the pump line, the incline direction and the piston circumferential direction of slant draw-in groove are unanimous, like this, at the rotation in-process, avoided deviating from the interior piston body outside because of the outer piston body that the atress is too big causes lies in the outside, bulk strength is bigger.

Drawings

FIG. 1 is a schematic structural view of the elastic piston for concrete pump of the present invention;

FIG. 2 is a schematic structural view of the inner piston body;

3 FIG. 3 3 3 is 3 a 3 cross 3- 3 sectional 3 view 3 taken 3 along 3 line 3 A 3- 3 A 3 of 3 FIG. 3 1 3; 3

Fig. 4 is a sectional view B-B of fig. 1.

Detailed Description

The structure and the operation principle of the elastic piston for the concrete pump of the present invention will be further described in detail with reference to the accompanying drawings.

As shown in fig. 1, fig. 2 and fig. 3, the utility model discloses elastic piston's for concrete pump structural schematic diagram, the utility model discloses elastic piston for concrete pump includes piston body 1, before piston body 1, back both ends have sealing ring 2, establish at piston body 1 center and have through-hole 3, be provided with locating sleeve 4 at through-hole 3's periphery, be provided with screw hole 5 on locating sleeve 4, piston body 1 includes interior piston body 11 and outer piston body 12, locating sleeve 4 and interior piston body 11 structure as an organic whole, sealing ring 2 and outer piston body 12 structure as an organic whole, be provided with adhesive linkage 6 between interior piston body 11 and the outer piston body 12.

Interior piston body 11 adopts the nylon materials that intensity is high and corrosion resisting property is good, and outer piston body 12 adopts rubber materials to make, is provided with adhesive linkage 6 between interior piston body 11 and the outer piston body 12, and interior piston body 11 and outer piston body 12 high temperature vulcanize together, whole weight greatly reduced, and manufacturing procedure and mould are simple moreover, and whole elastic piston's elasticity is good, and is sealed effectual, and intensity improves moreover.

As shown in fig. 3, a plurality of protruding rings 7 and annular grooves 8 are arranged at intervals in the axial direction on the radial outer side of the inner piston body 11, and the inner side surface of the outer piston body 12 matches with the radial outer side of the inner piston body 11. When the elastic piston moves back and forth along the pump pipe, the outer piston body 12 positioned on the outer side cannot be separated from the outer side of the inner piston body 11 due to stress, and the overall tensile strength is higher.

As shown in fig. 4, a plurality of oblique clamping grooves 9 are arranged on the radial outer side of the convex ring 7 along the circumferential direction, the inner side of the outer piston body 12 is matched with the radial outer side of the inner piston body 11, in order to avoid abrasion of the same part of the piston due to a pump pipe or other foreign matters in the piston advancing and retreating process, in the using process, the piston needs to rotate in the pump pipe along the circumferential direction, the oblique direction of the oblique clamping grooves is consistent with the circumferential direction of the piston, in this way, in the rotating process, the outer piston body located on the outer side is prevented from being separated from the outer side of the inner piston body due to overlarge stress, and the overall strength is higher.

The utility model discloses a protection scope not only limits in above-mentioned embodiment, as long as the structure with the utility model discloses elastic piston for the concrete pump's structure is the same, just falls the utility model discloses the scope of protection.

Claims

1. Elastic piston for concrete pump, including the piston body the preceding, back both ends of piston body have the sealing ring, establish at the piston body center and have the through-hole the periphery of through-hole is provided with the position sleeve be provided with screw rod hole, its characterized in that on the position sleeve: the piston body comprises an inner piston body and an outer piston body, the positioning sleeve and the inner piston body are of an integrated structure, the sealing ring and the outer piston body are of an integrated structure, and a bonding layer is arranged between the inner piston body and the outer piston body.

2. The elastic piston for a concrete pump according to claim 1, characterized in that: the radial outer side of the inner piston body is provided with a plurality of alternately arranged convex rings and annular grooves along the axial direction, and the inner side surface of the outer piston body is matched with the radial outer side of the inner piston body.

3. The elastic piston for a concrete pump according to claim 2, characterized in that: the radial outer side of the convex ring is provided with a plurality of oblique clamping grooves along the circumferential direction of the convex ring, and the inner side of the outer piston body is matched with the radial outer side of the inner piston body.