CN2929173Y - Coal bed methane extraction machine - Google Patents

Abstract

The utility model relates to a coal-seam gas collector and comprises a mule head, a balance beam, a crank, a counterbalancing mass, a collector support, a machine base, a gearbox, a link motor, a generator pulley, a gearbox pulley and a belt, which is characterized in that both sides of the rear portion of the balance beam is provided with circular or rectangular balance beam counterbalancing masses with round holes at the center that hang on the circular shaft of the rear portion of the balance beam, the lateral support in the middle portion of the mule head is provided with circular or rectangular mule head counterbalancing masses that hang on the circular shaft of the lateral support in the middle portion of the mule head, and the original single counterbalancing mass arranged on both sides of the crank is changed into two combining forms that connect with each other by a screw cap of a screw, and the way of connection with the crank is not changed.

Description

Coal bed methane extraction machine

1. Technical field

The utility model relates to a coal gas mining equipment used in a coal mining system for mining coal bed gas, in particular to a coal bed gas extraction machine.

2. Background technology

As the world pays more and more attention to environmental protection, the demand for natural gas will rise rapidly, and gas energy will become the world's first energy. In recent years, countries all over the world have achieved great success in the development of coalbed methane.

Compared with conventional natural gas exploitation, coalbed methane has three characteristics: first, the accumulation of a large amount of coalbed methane in the coal seam is mainly in the state of adsorption on the surface of the coal bed; The third is that coal seams generally contain water, and drainage is required during gas extraction. The production process of coal bed adsorption gas includes three stages, namely: desorption from the surface of coal matrix pores; diffusion into fractures through matrix and micropores; migration to wellbore through fractures. The migration law of coalbed fluid determines the production characteristics of coalbed methane. (The change of gas and water production in coalbed methane well drainage can be divided into three stages, namely: drainage and pressure reduction stage; stable production stage; gas production decline stage.)

These production mechanisms of coalbed methane determine that when the coalbed methane is extracted, drainage operations must be carried out to the greatest extent, which not only reduces the reservoir pressure, but also reduces the water saturation of the reservoir and increases the relative permeability of the gas, thereby increasing The ability of desorbed gas to migrate to the wellbore through the coal seam fracture system helps to increase gas production.

The pumping unit used for coalbed methane development is similar to but different from the pumping unit used for oil production. The pumping unit used for oil production increases with the increase of oil production time, oil extraction depth and load. However, the pumping unit for coalbed methane has the largest load when it is draining water. As the water level continues to drop, the load on the pumping unit will become smaller and smaller. In order to make the pumping unit for oil production fully suitable for mining coalbed methane, the pumping unit must be improved accordingly.

3. Contents of the invention

The purpose of this utility model is to provide a coalbed methane pumping machine, solve the problem that the existing pumping unit is not suitable for mining coalbed methane, improve the balance structure of the pumping unit, make it adapt to the law of coalbed methane pumping, and achieve good balance and save electricity for coalbed methane mining.

The technical scheme of the utility model is realized in the following ways:

The utility model is composed of a donkey head, a traveling beam, a crank, a balance block, a mining and pumping frame, a base, a reduction box, a connecting rod motor, a motor pulley, a reduction box pulley and a belt, and is characterized in that the rear end of the traveling beam There are round or rectangular beam balance weights with round holes in the center on both sides, hanging on the round shaft fixed at the rear end of the beam; there is a round or rectangular center with a circle on the lateral support in the middle of the donkey head. The balance weight of the donkey head with a hole is hung on the round shaft fixed on the horizontal support in the middle of the donkey head; the original balance weights on both sides of the crank are changed from a single integral shape to a combination of two pieces, which are connected by bolts and nuts , and the connection with the crank remains unchanged.

The motor is set as a stepless speed regulation motor.

Compared with the prior art, the utility model has the following advantages:

1. When adjusting the balance of the pumping machine, increasing or decreasing the balance weight is flexible, easy to operate, and saves time and effort;

2. It can adapt to the production law of coalbed methane mining and ensure that the coalbed methane extraction machine is always working under a good balance. Save electricity and increase gas production;

3. The motor is set as a stepless speed regulating motor, which is convenient and quick to adjust the working stroke of the extraction machine.

4. Description of drawings

Fig. 1 - the structural representation of the utility model

In the figure 1-base 2-speed regulating motor 3-gearbox 4-crank 5-balance weight 6-connecting rod 7-beam balance weight 8-beam 9-extraction rack 10-donkey head 11-donkey head balance piece

5. Specific implementation

In order to further disclose the technical solution of the utility model, the following will be described in detail through the embodiments in conjunction with the accompanying drawings:

The utility model consists of a base 1, a speed regulating motor 2, a reduction box 3, a crank 4, a balance block 5, a connecting rod 6, a beam balance block 7, a beam 8, a pumping frame 9, a donkey head 10 and a donkey head balance Block 11 is made up of, it is characterized in that being provided with circular or rectangular beam balance weight 7 with round hole in the both sides of the rear end of swimming beam, hanging on the circular shaft that is fixed on the rear end of swimming beam; The horizontal support in the middle part is provided with a circular or rectangular donkey head balance weight 11 with a round hole, which is hung on the round shaft fixed on the horizontal support in the middle part of the donkey head; The overall shape of the block is changed to two combined shapes, which are connected by bolts and nuts, and the connection with the crank remains unchanged. This balance structure adapts to the law of coalbed methane production and ensures that the coalbed methane extraction machine is always kept in good balance. Working under working conditions, saving electric energy and increasing gas volume.

Claims (2)

1, a kind of coalbed methane extracting machine, is made up of donkey head, traveling beam, crank, balance block, extracting frame, base, reduction box, connecting rod motor, motor pulley, reduction box pulley and belt, is characterized in that The two sides of the rear end of the beam are provided with a circular or rectangular beam balance block with a round hole in the center, which is hung on a round shaft fixed at the rear end of the beam; a circular support is provided on the horizontal support in the middle of the donkey head. Or the donkey head balance weight with a round hole in the center of the rectangle is hung on the round shaft fixed on the horizontal support in the middle of the donkey head; the original balance weights on both sides of the crank are changed from a single integral shape to two combined shapes They are connected by bolts and nuts, and the connection mode with the crank remains unchanged. 2. The coalbed methane extraction machine according to claim 1, characterized in that the motor is set as a stepless speed regulation motor.