CN214033852U

CN214033852U - Slag discharge device and double-wheel slot milling machine

Info

Publication number: CN214033852U
Application number: CN202022633578.4U
Authority: CN
Inventors: 于卓伟; 张祖林; 韩威震
Original assignee: Beijing Sany Intelligent Technology Co Ltd
Current assignee: Beijing Sany Intelligent Technology Co Ltd
Priority date: 2020-11-12
Filing date: 2020-11-12
Publication date: 2021-08-24
Anticipated expiration: 2030-11-12

Abstract

The utility model provides a sediment device is applied to double round slot milling machine, including first slush pump, connect the scum pipe on the first slush pump, be equipped with on the scum pipe and be used for promoting the mud at the intraductal supplementary hoist mechanism that upwards flows of scum. The utility model also provides a double round slot milling machine, including above-mentioned sediment device of arranging. The auxiliary lifting mechanism in the slag discharging device is started to promote the mud to flow upwards in the slag discharging pipe, so that the pressure at the bottom end of the slag discharging pipe is reduced, the first mud pump keeps enough slag discharging capacity, the mud and the sediments can be discharged smoothly, and the pipe is not easy to block.

Description

Slag discharge device and double-wheel slot milling machine

Technical Field

The utility model relates to an engineering machine tool field especially relates to a sediment device and double round slot milling machine.

Background

In the process of excavating the underground diaphragm wall by using a double-wheel slot milling machine, a large amount of sediments are generated at the bottom of the groove obtained by excavation. The constructors need to clean the sediments by means of slag discharge equipment so as to ensure the forming quality of the underground diaphragm wall.

At present, the common deslagging method is to inject slurry into the tank, and then pump out the slurry at the bottom of the tank by using a slurry pump, and the sediment is pumped out together with the slurry. However, this slag discharge method is difficult to discharge slag, and the pressure at the bottom of the tank gradually increases as the depth of the tank is increased, which causes the slag discharge capability of the slurry pump to be deteriorated and the pipe to be easily blocked.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that the slag discharge capacity of the slurry pump is attenuated along with the increase of the excavation depth, the utility model aims to provide a slag discharge device.

The utility model provides a following technical scheme:

a slag discharging device is applied to a double-wheel slot milling machine and comprises a first slurry pump, wherein a slag discharging pipe is connected onto the first slurry pump, and an auxiliary lifting mechanism used for promoting slurry to flow upwards in the slag discharging pipe is arranged on the slag discharging pipe.

As a further optional scheme for the slag discharging device, the auxiliary lifting mechanism comprises an air pipe, an air outlet end of the air pipe is connected with the slag discharging pipe, and an air inlet end of the air pipe is connected with an air compressor. The air compressor injects compressed air into the slag discharging pipe through the air pipe, a large amount of bubbles float upwards, the bubbles drive slurry in the floating process, the conveying speed of the slurry and sediments in the slag discharging pipe can be accelerated, and the slag discharging efficiency is improved.

As a further optional scheme of the slag discharging device, an air outlet end of the air pipe is connected with an elbow pipe for guiding air flow to turn, and the air pipe is connected with the slag discharging pipe through the elbow pipe.

As a further optional scheme of the slag discharging device, a one-way valve is arranged between the air outlet end of the air pipe and the slag discharging pipe and is used for preventing mud and sediment in the slag discharging pipe from flowing into the air pipe so as to keep the air pipe smooth.

As a further alternative to the slag discharge device, the first mud pump is connected to an inlet of the slag discharge pipe.

As a further optional scheme of the slag discharging device, the slag discharging pipe includes a first pipe joint and a second pipe joint, the auxiliary lifting mechanism includes a second mud pump, the second mud pump is connected between the first pipe joint and the second pipe joint, the second mud pump and the first mud pump relay to lift mud, and the slag can be discharged smoothly even when a deep groove is excavated.

As a further optional scheme of the slag discharging device, a buffer tank is arranged between the first pipe section and the second pipe section, the second mud pump is connected with the buffer tank, and the buffer tank is used for containing mud.

As a further optional scheme of the slag discharging device, an air pressure balance pipe is arranged on the buffer tank.

As a further optional scheme for the slag discharging device, a lifting floating plate is arranged in the buffer tank, the air pressure balance pipe is communicated with an area above the lifting floating plate, and the second mud pump and the slag discharging pipe are both communicated with an area below the lifting floating plate.

The utility model also aims to provide a double round slot milling machine.

The utility model provides a following technical scheme:

a double round slotter includes above-mentioned sediment device.

The embodiment of the utility model has the following beneficial effect:

the auxiliary lifting mechanism in the slag discharging device is started to promote the mud to flow upwards in the slag discharging pipe, so that the pressure at the bottom end of the slag discharging pipe is reduced, the first mud pump keeps enough slag discharging capacity, the mud and the sediments can be discharged smoothly, and the pipe is not easy to block.

In order to make the aforementioned and other objects, features and advantages of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic view showing an overall structure of a slag discharge device provided in embodiment 1 of the present invention;

fig. 2 is a schematic view showing the overall structure of a slag discharge device provided in embodiment 2 of the present invention;

FIG. 3 shows an enlarged view at A in FIG. 2;

fig. 4 shows an overall structure schematic diagram of the slag discharging device provided in embodiment 3 of the present invention.

Description of the main element symbols:

1-a first mud pump; 2-a slag discharge pipe; 21-a first pipe section; 22-a second pipe section; 3-an auxiliary lifting mechanism; 31-trachea; 32-an air compressor; 33-bending the pipe; 34-a one-way valve; 35-a second mud pump; 36-a buffer tank; 37-air pressure balance tube; 38-lifting the floating plate.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the templates herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Example 1

Referring to fig. 1, the present embodiment provides a slag discharging device applied to a dual-wheel slot milling machine, which includes a first slurry pump 1 and a slag discharging pipe 2, wherein an auxiliary lifting mechanism 3 is disposed on the slag discharging pipe 2.

When the double-wheel slot milling machine is used for excavating the underground diaphragm wall, slurry is injected into a slot obtained by excavation, and the slurry is mixed with sediments at the bottom of the slot. The first slurry pump 1 outputs power, slurry at the bottom of the tank is pumped to the ground through the slag discharge pipe 2, and sediment mixed with the slurry is discharged along with the slurry.

When the depth of the groove is greater, the auxiliary lifting mechanism 3 is activated, promoting the upward flow of mud in the slag discharge pipe 2, to relieve the pressure of the first mud pump 1. The first slurry pump 1 can stably and continuously pump out slurry until the slag discharge operation is completed in cooperation with the auxiliary lifting mechanism 3.

Specifically, the auxiliary lifting mechanism 3 includes an air pipe 31 and an air compressor 32. The air compressor 32 is fixed on the ground or a frame of engineering machinery such as a double-wheel slot milling machine, the air inlet end of the air pipe 31 is connected with the air outlet of the air compressor 32, and the air outlet end of the air pipe 31 extends into the slurry and is connected with the slag discharge pipe 2.

The working principle is as follows:

the air compressor 32 outputs power and pumps compressed air into the slag discharge pipe 2 through the air pipe 31. Compressed air forms a large amount of bubbles after entering the slag discharging pipe 2, and the bubbles can quickly float upwards and lift mud upwards due to the fact that the density of the compressed air is far smaller than that of the mud, and the mud is promoted to flow upwards in the slag discharging pipe 2.

In order to fully utilize the compressed air, the air outlet end of the air pipe 31 is connected with the bottom end of the slag discharge pipe 2, and the slurry is always supported by air bubbles when flowing in the slag discharge pipe 2.

Obviously, the strength of the lifting force of the bubbles on the slurry is directly related to the floating speed of the bubbles. The faster the bubbles float, the stronger the lifting force on the slurry. In addition, the compressed air has a certain initial velocity when flowing into the slag discharge pipe 2 from the air pipe 31, and the compressed air flows from top to bottom in the air pipe 31 in the opposite direction to the flow direction of the slurry in the slag discharge pipe 2.

On the basis, in order to improve the floating speed of the bubbles in the slag discharge pipe 2, a bent pipe 33 is arranged between the air outlet end of the air pipe 31 and the slag discharge pipe 2 to be connected.

The bent pipe 33 is similar to a U shape, one end of the bent pipe 33 is connected with the air outlet end of the air pipe 31, and the other end of the bent pipe 33 is connected with the bottom end of the slag discharge pipe 2. The compressed air enters the bent pipe 33 after leaving the air outlet end of the air pipe 31, the flow direction of the compressed air is gradually changed under the guidance of the bent pipe 33, and finally the compressed air enters the slag discharging pipe 2 from bottom to top.

In the process, the kinetic energy loss of the compressed air is small, the compressed air has an upward initial velocity after entering the slag discharging pipe 2, and the dispersed bubbles can quickly float upwards, so that the slurry is more effectively promoted to flow upwards in the slag discharging pipe 2.

Except for accelerating the conveying speed of the mud and the sediment in the slag discharge pipe 2 by utilizing the floating process of the bubbles to improve the slag discharge efficiency, the pressure of the bubbles is smaller and smaller when the bubbles float in the slag discharge pipe 2, and the volume of the bubbles is gradually increased. The bubbles expanded outwards extrude the surrounding slurry and sediments to cause the slurry and sediments in the deslagging pipe 2 to generate local vibration, so that the sediments are prevented from gathering together, and the probability of pipe blockage is reduced.

In addition, the compressed air enters the slag discharging pipe 2 and then is dispersed to form bubbles which can occupy the space in the slag discharging pipe 2. And as the bubbles float upwards, the volume of the bubbles is gradually increased, and the occupied space of the bubbles is also increased. In short, the weight of the material per unit volume in the slag discharge pipe 2 decreases, that is, the average density decreases, as the bubbles are mixed in. Under the condition that the depth is not changed, the pressure inside the fluid is in positive correlation with the density of the fluid, so that the pressure difference between the top end and the bottom end of the slag discharging pipe 2 is reduced, the first mud pump 1 is also favorable for smoothly discharging mud and sediments, and the defect that the slag discharging capacity of the first mud pump 1 is gradually reduced along with the increase of the excavation depth is overcome.

In order to prevent mud and sediment from flowing back into the elbow 33 and the air pipe 31 when the air compressor 32 is closed, a check valve 34 is connected to the end of the elbow 33 facing the slag discharge pipe 2.

The air compressor 32 injects compressed air into the air pipe 31 to accumulate the air in the air pipe 31 and the elbow 33. When the air pressure in the air pipe 31 and the elbow pipe 33 reaches a certain value, the check valve 34 is opened to allow the compressed air to enter the slag discharge pipe 2. Before and after the air compressor 32 injects compressed air, the one-way valve 34 is in a closed state, and slurry in the slag discharge pipe 2 cannot enter the bent pipe 33 and the air pipe 31.

Due to the existence of the check valve 34, the air compressor 32 does not need to be opened all the time during the slag discharging process. Therefore, according to the needs of actual working conditions, the constructor can select to independently start the first slurry pump 1 for deslagging, can also simultaneously start the first slurry pump 1 and the air compressor 32 for deslagging, and can also independently start the air compressor 32 for deslagging. In each slag discharging process, the discharge capacity of the first mud pump 1 and the flow of the compressed air delivered by the air compressor 32 can be adjusted to better adapt to the actual working condition.

For mud mixed with bubbles, the first mud pump 1 cannot pump efficiently. To ensure proper operation of the first sludge pump 1, the first sludge pump 1 is arranged upstream of the gas line 31. Specifically, the first slurry pump 1 is positioned at the bottom of the tank, the slurry inlet of the first slurry pump 1 is positioned in a region where slurry and sediment are mixed, and the slurry outlet of the first slurry pump 1 is connected with the inlet of the slag discharge pipe 2.

In actual operation, the first mud pump 1 is started, the first mud pump 1 sucks in mud, sediment is mixed in the mud and enters the first mud pump 1 along with the mud. The first sludge pump 1 delivers a mixture of sludge and sludge into the sludge discharge pipe 2 and then starts the air compressor 32.

The air compressor 32 injects compressed air into the air pipe 31 until the air pressure in the air pipe 31 reaches a certain value. At this time, the check valve 34 is opened, and the compressed air enters the slag discharge pipe 2, is dispersed into bubbles and then is mixed with the slurry and the sediment. Under the combined action of the thrust of the first slurry pump 1 and the lifting force of the floating bubbles, the slurry and the sediments are accelerated to be conveyed upwards and finally reach the ground.

In another embodiment of the present application, there is provided a two-wheel slot milling machine including the above-described slag discharge device. When the double-wheel slot milling machine excavates the underground diaphragm wall, slurry is injected into a slot obtained by excavation, the slurry is mixed with sediment at the bottom of the slot, and the sediment is discharged by the sediment discharge device continuously.

Specifically, when the excavation depth of the double-wheel slot milling machine is small, only the first slurry pump 1 is started, and the first slurry pump 1 is used for pumping the slurry to the ground, so that the sediment is taken out.

Along with the gradual increase of the excavation depth of the double-wheel slot milling machine, constructors open the air compressor 32, inject compressed air into the slag discharge pipe 2, and assist the first mud pump 1 to lift mud and sediment.

With the further increase of the excavation depth of the double-wheel slot milling machine, constructors can adjust the flow of compressed air supplied by the air compressor 32 upwards, the lifting effect of bubbles on mud is enhanced, and higher slag discharging efficiency is kept.

Example 2

Referring to fig. 2 and 3 together, the difference from embodiment 1 is that the structure of the auxiliary lifting mechanism 3 is different, the position of the first slurry pump 1 is different, the slag discharging pipe 2 is composed of a first pipe joint 21 and a second pipe joint 22, and the first pipe joint 21 is lower than the second pipe joint 22.

In this embodiment, the auxiliary lifting mechanism 3 includes a surge tank 36 and a second mud pump 35. The first pipe section 21, the second mud pump 35, the buffer tank 36, the second pipe section 22 and the first mud pump 1 are connected in sequence.

Wherein the cross-sectional area of the surge tank 36 is much larger than the first pipe section 21 and the second pipe section 22. The surge tank 36 can hold more mud than the first pipe section 21 and the second pipe section 22 at the same height.

The slurry inlet of the second slurry pump 35 is connected with the top end of the first pipe joint 21, and the slurry outlet of the second slurry pump 35 is connected with the bottom of the buffer tank 36.

The bottom end of the second pipe section 22 is connected to the bottom of the buffer tank 36, and the first slurry pump 1 is connected to the top end of the second pipe section 22.

In operation, the second mud pump 35 lifts the mixture of mud and sediment from the bottom of the tank into the buffer tank 36, and the first mud pump 1 lifts the mud and sediment from the buffer tank 36 to the surface. The first slurry pump 1 and the second slurry pump 35 lift the slurry and the sediments in a relay mode, namely the excavation depth of the excrement tank is large, and the sediments can be stably and effectively discharged.

The first mud pump 1 and the second mud pump 35 are difficult to achieve a complete consistency in the mud delivery rate. When the speed of delivering the mud by the first mud pump 1 is higher than that by the second mud pump 35, the mud in the buffer tank 36 is reduced; when the first mud pump 1 delivers less mud than the second mud pump 35, the mud in the buffer tank 36 increases. In the above process, the amount of mud in the buffer tank 36 is varied without interference between the first mud pump 1 and the second mud pump 35.

Since the slurry in the buffer tank 36 is constantly changing and the space occupied by the slurry is also constantly changing, in order to maintain the air pressure balance in the buffer tank 36, an air pressure balance pipe 37 is connected to the top of the buffer tank 36.

The top end of the air pressure balance pipe 37 is positioned above the liquid level of the slurry and is communicated with the outside atmosphere. When the amount of the slurry in the buffer tank 36 changes, air enters and exits the buffer tank 36 through the air pressure balance pipe 37, so that the air pressure in the buffer tank 36 is kept stable, and the influence on the normal operation of the first slurry pump 1 and the second slurry pump 35 is avoided.

Since the buffer tank 36 is communicated with the outside atmosphere, in order to prevent air in the buffer tank 36 from being sucked into the slag discharge pipe 2, a lifting floating plate 38 is provided in the buffer tank 36.

The lifting floating plate 38 is arranged in the horizontal direction, and is arranged in the buffer box 36 in a sliding manner in the vertical direction, so that the lifting floating plate can be lifted freely. The area below the lifting float 38, to which the second mud pump 35 and the reject pipe 2 are connected, is filled with a mixture of mud and sediment. The area above the lifting floating plate 38 is entirely air, and the air pressure balance pipe 37 is communicated with the area.

When the amount of slurry in the buffer tank 36 changes, the height of the lifting floating plate 38 also changes, but the interior of the buffer tank 36 is always divided into two areas to prevent air from entering the slag discharge pipe 2.

Example 3

Referring to fig. 4, the difference from embodiment 2 is that the first slurry pump 1 is disposed at the bottom of the tank, the slurry outlet of the first slurry pump 1 is connected to the bottom end of the first pipe joint 21, the slurry inlet of the second slurry pump 35 is connected to the buffer tank 36, and the slurry outlet of the second slurry pump 35 is connected to the bottom end of the second pipe joint 22.

At this time, the mixture of the sludge and the sludge is lifted from the bottom of the tank to the buffer tank 36 by the first slurry pump 1, and then the sludge and the sludge in the buffer tank 36 are lifted to the ground by the second slurry pump 35.

In all examples shown and described herein, any particular value should be construed as merely exemplary, and not as a limitation, and thus other examples of example embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

The above-described embodiments are merely illustrative of several embodiments of the present invention, which are described in detail and specific, but not intended to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.

Claims

1. A slag discharging device is applied to a double-wheel slot milling machine and is characterized by comprising a first slurry pump, wherein a slag discharging pipe is connected to the first slurry pump, and an auxiliary lifting mechanism for promoting slurry to flow upwards in the slag discharging pipe is arranged on the slag discharging pipe.

2. The slag discharge device according to claim 1, wherein the auxiliary lifting mechanism comprises an air pipe, an air outlet end of the air pipe is connected with the slag discharge pipe, and an air inlet end of the air pipe is connected with an air compressor.

3. The slag discharging device according to claim 2, wherein the air outlet end of the air pipe is connected with an elbow pipe for guiding the air flow to turn, and the air pipe is connected with the slag discharging pipe through the elbow pipe.

4. The slag discharge device according to claim 2, wherein a check valve is provided between the gas outlet end of the gas pipe and the slag discharge pipe.

5. The slag discharge apparatus of claim 2, wherein the first mud pump is connected to an inlet of the slag discharge pipe.

6. The slag discharge apparatus of claim 1, wherein the slag discharge pipe comprises a first pipe section and a second pipe section, the auxiliary lifting mechanism comprises a second mud pump, the second mud pump is connected between the first pipe section and the second pipe section, and the second mud pump and the first mud pump relay the lifting of the mud.

7. The slag extraction apparatus of claim 6, wherein a buffer tank is disposed between the first pipe section and the second pipe section, and the second mud pump is connected to the buffer tank for receiving mud.

8. The slag discharge device according to claim 7, wherein a pressure balance pipe is provided on the buffer tank.

9. The slag discharge device according to claim 8, wherein a lifting floating plate is arranged in the buffer tank, the air pressure balance pipe is communicated with the area above the lifting floating plate, and the second slurry pump and the slag discharge pipe are both communicated with the area below the lifting floating plate.

10. A two-wheel slot milling machine, characterized in that it comprises a slag extraction device according to any one of claims 1-9.