Lining trolley generally consists of template assembly, bracket assembly, translation mechanism, mast assembly, master-slave travel mechanism, lateral hydraulic cylinders, lateral support jacks, bracket support jacks, and gantry support jacks.
1. Template assembly
The template consists of 1~2 top molds and 2~4 side molds to form a cross section. The top mold and the top mold are connected as a whole by bolts, and the side mold and the top mold are connected by hinge trunnions. Each section of the template is made 1.5 meters wide, composed of multiple sections, and the templates are connected by bolts. There are working windows arranged in a product shape on the template, and a grouting device connected with the delivery pump Φ125 is installed on the top.
2. Bracket assembly
The bracket mainly bears the weight of the upper concrete and formwork during casting. It supports the formwork, and the lower part transmits the force to the mast through a hydraulic cylinder and a supporting jack. The bracket is composed of two longitudinal beams, two side beams, multiple middle beams and uprights. The longitudinal beams are welded by steel plates into an I-shaped section; the side beams and multiple middle beams are made of I-steel; the columns are made of I-steel.
3. Translation mechanism
A hydraulic trolley, one set of translation mechanism at the front and rear, is supported on the side beam of the mast. The hydraulic cylinder (GE160/90─300) on the translation trolley is connected to the bracket longitudinal beam, and the vertical positioning and demolding of the template are adjusted through the contraction of the cylinder. The adjustment stroke is 300mm; and the horizontal cylinder (GE90 /50─200) It is used to adjust whether the center of the lining of the template is aligned with the center of the tunnel. The left and right adjustable stroke is 100mm.
4. The door frame assembly
The mast is the main load-bearing component of the entire trolley. It is made up of beams, columns and longitudinal beams connected by bolts, and each beam and column are connected by connecting beams and diagonal tie rods. The main structure of the hydraulic trolley is welded by steel plates, and the entire mast is guaranteed to have sufficient strength, rigidity and stability. The mast beams are welded by steel plates into I or II-shaped cross-sections; the columns are also welded by I-beams into I or II-shaped cross-sections; the longitudinal beams are welded by steel plates; the oblique supports are made of I-beam or channel steel; each connecting beam adopts grooves Steel, I-beam or angle steel.
5. Master-slave walking mechanism
The hydraulic trolley has two master and slave walking mechanisms, which are hinged on the longitudinal beam of the mast. The main traveling mechanism is decelerated by a Y-type motor driven by a first-stage gear, and then decelerated by a two-stage chain. The traveling speed is 8m/min and the traveling wheel diameter is φ350mm;
6. Lateral hydraulic cylinder
The lateral hydraulic cylinder is mainly used for demolding the side template, and at the same time it plays the role of supporting the template. The lateral cylinder (GE100/63-400) selects 4 cylinders according to the length of the lining, and the adjustment stroke is 250mm.
7. Lateral screw jack
The screw jacks installed on the portal frame are used to support and adjust the position of the formwork and bear the pressure generated when concrete is poured. The screw diameter is 65mm, and its adjustment stroke is 250mm. Consider that the special screw of this trolley is a single screw.
8. Bracket supporting weight
It is mainly to improve the stress conditions of the bracket longitudinal beam when concrete is poured, and to ensure the reliability and stability of the bracket. The screw diameter is 65mm, and its adjustment stroke is 150mm.
9. The support of the door frame
It is connected under the longitudinal beam of the gantry. When the trolley is working, it bears the weight of the trolley and concrete, which improves the stress condition of the longitudinal beam of the gantry and ensures the stability of the gantry when the trolley is working. The screw diameter is 65mm and its adjustment stroke is 200mm.
The above is a detailed introduction of the various components of the lining trolley. Only by clearly grasping the working principle of each component can the lining trolley be better operated.