Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Stretching jack

A technology for tensioning jacks and cylinders, applied in the direction of lifting devices, etc., can solve the problems of high cost of the prestressed tendon tensioning system, long working length of the tensioning bars, large anchor holes of the tensioning system, etc. Small shrinkage and low stress loss

Active Publication Date: 2009-08-19
CHINA RAILWAY 23RD CONSTR BUREAU LTD +1
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Existing tensioning jacks, tensioning prestressed tendons, and locking clip-type anchors have long working lengths of tensioning tendons and a lot of material waste, and the cost of the prestressing tendon tensioning system is high
In addition, the anchor hole of the tension system is large, which is unfavorable for the concrete of the thin ballastless track slab, and it is difficult to seal the anchor

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Stretching jack
  • Stretching jack
  • Stretching jack

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] Such as Figure 1-3 As shown, a tension jack includes a cylinder body 6, and one end of the cylinder body 6 equipped with a support 10 is connected with an end cover 14, which is convenient for installing parts in the inner cavity of the cylinder body, and the other end of the cylinder body 6 is connected with a large gear through a bearing 13. There is a sleeve at one end of the large gear 13, and an intermediate wheel 18 meshing with it is located on one side of the large gear 13. One end of the gear shaft 7 with a square head is installed on the support 10, and the other end of the gear shaft 7 is fixedly connected. There is a small gear 3 meshing with the intermediate wheel 18, and the small gear 3 meshing with each other. The intermediate wheel 18 and the large gear 13 are installed in the gearbox 2. The gearbox 2 is formed by connecting the left and right boxes through the hexagon socket connection screws 17. , the sleeve of the large gear 13 is fitted with a load...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a tensioning jack, which belongs to the technical field of jacks and comprises a cylinder body. One end of the cylinder body equipped with a support is connected with an end cover, and the other end is connected with a large gear with a sleeve through a bearing. The gear shaft, one end of the gear shaft is fixedly connected with the pinion, the large gear and the small gear mesh with the intermediate gear respectively, and the intermeshing pinion, intermediate wheel and large gear are installed in the gearbox; the cylinder is provided with a nozzle connected to the piston , There is an observation window on the cylinder body; the inner cavity of the cylinder is a stepped hole, and a piston rod is arranged in the hole, and a piston is set on the piston rod, and a sealing ring is provided on the connecting part between the piston and the cylinder body on both sides of the oil nozzle, and the piston is connected One end of the pointer and the other end of the pointer are located at the observation window of the cylinder body, and a return spring is provided in the inner cavity of the cylinder body; the invention saves material, time and has high tensioning precision, and is suitable for ballastless track plates and similar short The prestressed concrete of slabs and short beams is a special machine for tensioning with steel rods (PC rods) and locking with threaded anchors.

Description

technical field [0001] The invention relates to a jack, in particular to a special double-acting jack, which is mainly used for ballastless track slabs and similar short slabs and short beams (≤6 meters) and is suitable for prestressed steel rods for prestressed concrete. (PC steel rod) special machine for tensioning and threaded anchor locking. Background technique [0002] Existing tensioning jacks, tensioning prestressed tendons, and locking clip-type anchors have long working lengths of tensioning tendons, a lot of material waste, and high cost of the prestressing tendons tensioning system. Moreover, the anchor holes of the tension system are large, which is unfavorable for the concrete of the thin ballastless track slab, and it is difficult to seal the anchor. Contents of the invention [0003] Based on the defects of the prior art, in order to adapt to the locking of steel rod tensioning and threaded anchors for new prestressed concrete, the purpose of the present i...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B66F3/24B66F3/25
Inventor 钱振地刘振民夏学成张国安罗兴友李运海叶友雄张雷徐振龙杨明辉周雪梅龚斯昆
Owner CHINA RAILWAY 23RD CONSTR BUREAU LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com