RU2223856C1 - Mechanical mixing plant - Google Patents

Abstract

FIELD: mixing technology; oil industry; transportation of dry powder-like materials, accumulation of materials in bin and preparation of grouting mortars at cementing of oil and gas wells. SUBSTANCE: proposed mixing plant includes bin mounted on chassis of transportation unit with proportioning worm feeders and loading conveyer arranged inside it, transfer reducer, chain transmission, vibrator, pipe line and servicing platforms with railing and ladders. Bin has bottom corresponding to shape of proportioning worm feeders with receiving chamber and hydraulic mixing unit. Attached technological equipment is made in form of unit mounted on its frame and provided with one input shaft of transfer reducer located in recess of bin; it is provided with six shafts: three shafts are input ones; one shaft is used for drive of loading unit and two other shafts are connected with flanges of proportioning worm feeders by means of articulated couplings; they rotate in opposite directions. EFFECT: optimal hanging of attached equipment; enhanced reliability of performing technological process. 2 dwg

Description

Mechanical mixing plant belongs to the mixing technique and can be used to transport dry powdered materials, accumulate them in your own bunker at the work site and prepare grouting mortars during cementing of oil and gas wells.

The well-known "Mixing installation mechanical" (US 6-30), produced according to TU 26-16-59-77, designed for the preparation of cement slurries during cementing of oil and gas wells, containing a hopper mounted on the vehicle chassis, metering screws placed in it and loading conveyor driven by a power take-off (KOM), transmission of loading and metering augers, chain transmissions, vibrator, service platforms with railings and ladders, while the hopper has a metering shaped their bottom screw mounted on the rear end wall of the hopper receiving chamber and a mixing device and the power take-off mounted on a chassis carrying the transfer box and is connected with its gear.

The disadvantage of this design is the installation of a power take-off box of significant weight on the chassis unit with supports not designed to absorb these loads, and the installation of additional KOM supports on the chassis frame complicates the design of the suspension assembly, tightens it and causes vibrations when the car moves.

The well-known “Mixing mechanical installation” (USU 6-30), also produced according to TU 26-16-59-77, is intended for transportation of dry powder materials and preparation of cement slurries, containing a hopper mounted on the vehicle chassis, metering screws placed in it and loading conveyor driven by the power take-off of the chassis through the driveshaft and the transfer gearbox, transmission of the loading and dosing augers, chain transmissions, vibrator, pipeline, service platforms with rail ogre runners and ladders, and the hopper has a bottom made in the form of metering augers, a receiving chamber and a mixing device installed on the rear end wall of the hopper, and the transfer gearbox is made on a five-cylinder cylindrical and located on the control platform in front of the front wall of the hopper (see the attached drawing “Mixer installation mechanical ”(USU 6-30) - prototype).

The main disadvantages of the mixing plant as a prototype are:

- the location chain of the drives of the working bodies of the installation: the power take-off unit - the driveshaft - the gearbox - the drive of the loading conveyor through the chain drive and the upper transmission - determines the position of the hopper on the chassis frame and does not allow it to be brought as close as possible to the power take-off of the car chassis, leading to a displacement of the center the mass of the loaded unit back along the direction of the vehicle does not provide optimal weight distribution and full use of the chassis rated capacity;

- insufficient compactness of attachments, in particular the location of the gearbox in front of the front wall of the hopper, does not allow to change the position of the latter in the longitudinal direction while maintaining the position of the chain transmission and transmission loading conveyor, which leads to an increase in the dimensions of the installation along the length

- the low adaptability of technological equipment for mounting it on other models of car chassis, due to the need to use a driveshaft of minimum length and the associated lowering (to ensure optimal skew angles in the shaft hinges) of lowering the gearbox into the intercarriage space of the car chassis frame, which is not always possible;

- the installation of metering augers with the same direction of rotation of the blades leads to a tendency to consolidate grouting material on one of the walls of the hopper, which reduces the reliability of the process;

The goal achieved by the invention is to create a plant design that provides optimal weight distribution of attachments, its compactness and increased reliability of the process.

This goal is achieved by the fact that in the installation of a mechanical mixer, including a hopper mounted on the vehicle chassis with metering screws placed therein and a loading conveyor, a transfer gear, a chain gear, a vibrator, a pipeline, service platforms with railings and stairs, the hopper has a bottom made in the form of metering augers, a receiving chamber and a water mixing device mounted on its rear end wall, attached technological equipment it is in the form of a functionally complete unit mounted on its own frame and having one input shaft of the transfer gear of the drive of the drive of the working bodies, which is located in the recess of the hopper and is made six-shaft with three output shafts, one of which serves to drive the loading conveyor, and the other two are connected by articulated couplings with dosing screw flanges and have opposite rotation.

A significant difference in the proposed device is that the attached technological equipment is made in the form of a functionally complete unit mounted on its own frame and having one input shaft of the transfer gear of the drive of the working bodies, which is located in the recess of the hopper and is made of a six-shaft with three output shafts, one of which serves to drive the loading conveyor, and the other two are connected by articulated couplings to the flanges of the metering screws and have opposite rotation.

Figure 1 presents a General view of the installation of the mixing mechanical, figure 2 is a transfer gear drive of the drive of the working bodies.

In the drawings and in the text, the following notation:

1 - block-preparing solution,

2 - frame

3 - chassis frame of the car,

4 - hopper

5 - metering augers,

6 - loading conveyor,

7 - vibrator,

8 - receiving camera,

9 - water mixing device

10 - service platform,

11 - stairs

12 - gear transfer case drive working bodies,

13 - input shaft of the gearbox,

14 - KOM car chassis,

15 - output shaft of the reducer,

16 - chain transmission

17 - transmission

18 - output shaft of the gearbox,

19 - output shaft of the gearbox.

The mechanical mixing plant contains a solution preparation unit (1), equipped on the frame (2) and fixed on the chassis (3) of the vehicle. The solution preparation unit (1) includes a hopper (4) designed for transporting and accumulating powder grouting materials and is a moisture-proof container, the side and front walls of which have tilt angles exceeding the natural angle of slope of the cement, with a bottom made in the form of two parallel troughs in which the metering screws (5) are located, having a direction of rotation opposite to each other, a loading conveyor (6), a vibrator (7) located on the rear wall of the hopper (4), the receiving chamber (8) and a water mixing device (9), a service platform (10) with fencing elements and a ladder (11) for climbing to the upper platform, as well as a transfer gear (12) installed in a niche formed by the front wall of the hopper (4), recessed at the bottom. The transfer gearbox (12) is made six-shaft with one input shaft (13) connected via a cardan shaft to the flange of the power take-off box (14) of the chassis and three output shafts. The shaft (15) serves to drive the loading conveyor (6) through a chain transmission (16) and transmission shafts (17), and the shafts (18) and (19) are connected by articulated couplings to the metering screws (5) and have opposite rotation.

Installation in the process of preparing the solution works as follows.

The initial dry grouting material is loaded by a loading conveyor (6) into the hopper (4) of the solution preparation unit (1), which is mounted on a frame (2) fixed to the frame (3) of the car chassis. Implementation of the mounted technological equipment in the form of a functionally complete unit allows it to be adapted to the maximum possible for mounting on other models of the chassis, corresponding to the carrying capacity without changing the technological parameters that affect the reliability of the process, and also use it as a stationary device with a drive.

In the hopper (4), the grouting material is moved by two metering screws (5) and enters the receiving chamber (8). Dosing augers (5) have the direction of rotation of the blades opposite to each other and from the corresponding side walls of the hopper, which helps to prevent the formation of grouting material on the walls of the hopper (4) and increase the reliability of the process.

The drive of the working bodies of the solution-preparation unit (1) is carried out from the KOM flange (14) of the car chassis through the driveshaft and the transfer gear (12), which is installed in a niche formed by the front wall of the hopper (4), recessed in the lower part. This arrangement of the transfer gearbox (12) allows you to bring the hopper (4) closer to the power take-off unit of the car, provides optimal weight distribution of the loaded car, its compactness, and more complete use of the chassis load capacity. The transfer gearbox (12) of the drive of the working bodies of the installation is made six-shaft with one input shaft (13), which is connected to the KOM (14) of the car chassis and three output shafts: a shaft (15) for driving the loading conveyor (6) and shafts (18) and (19) having a direction of rotation opposite to each other for driving metering screws (5).

This design of the transfer gearbox (12) ensures the suitability of the mounted technological equipment, combined into one functional unit for mounting on different models of the chassis without changing its technological parameters that affect the reliability of the process.

Based on the above, the proposed technical solution allows you to create the design of the mechanical mixing plant, providing optimal weight distribution of attachments, its compactness and reliability of the process.

Claims (1)

Mechanical mixing plant, including a hopper mounted on the vehicle chassis with metering screws placed in it and a loading conveyor, a transfer gearbox, chain gear, a vibrator, a pipeline, service platforms with railings and stairs, the hopper has a bottom made in the form of metering screws, mounted on its rear end wall of the receiving chamber and a water mixing device, characterized in that the attached technological equipment is made in the form of of a completely finished unit mounted on its own frame and having one input shaft of the transfer gear of the drive of the drive of the working bodies, which is located in the recess of the hopper and is made of six-shaft with three output shafts, one of which serves to drive the loading conveyor, and the other two are connected by articulated couplings with metering flanges screws and have opposite rotation.

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