WO2015154268A1

WO2015154268A1 - Crane and engine system thereof

Info

Publication number: WO2015154268A1
Application number: PCT/CN2014/075028
Authority: WO
Inventors: 陈延波; 曹光光; 张艳侠; 丁宏刚; 毛琦; 洪彬; 姜栋
Original assignee: 徐州重型机械有限公司
Priority date: 2014-04-10
Filing date: 2014-04-10
Publication date: 2015-10-15
Also published as: EA201690931A1; EA037431B1

Abstract

The present application discloses an engine system of a crane, which includes a natural gas engine (11) arranged on a walking platform plate (30) between a crane cab (31) and a turntable (32), a liquid storage tank (12) for containing liquefied natural gas, and a liquefied natural gas (LNG) system composed of a vaporization assembly (13), wherein an outlet of the liquid storage tank (12) is in communication with a gas inlet of the natural gas engine (11) through the vaporization assembly (13). The present application further discloses a crane having the above-mentioned engine system. The present application can reduce the cost of using the crane and noise, and is environmentally friendly.

Description

Crane and engine system thereof

Technical field

The invention relates to the technical field of engineering machinery power control, in particular to an engine system. The invention also relates to a crane having the above described engine system.

Branch

At present, the crane power system basically matches the diesel engine system. The diesel engine system includes a diesel engine and a fuel supply system connected to the diesel engine. The oil supply system includes an oil inlet portion and a return oil portion.

Please refer to FIG. 1. FIG. 1 is a schematic view showing the structure of a typical diesel engine system in the prior art.

The oil inlet part mainly includes a diesel tank 6, a strainer 5, an engine oil inlet pipe 3, an engine oil supply pump 2, a diesel fine filter 1 and the like; the oil returning part mainly includes a return oil pipe 4; when the diesel engine 7 starts working, the diesel oil is in the engine Under the action of the oil supply pump 2, it is pumped out from the oil outlet of the diesel tank 6. After being filtered by the coarse filter 5, it passes through the diesel engine inlet pipe 3, passes through the engine oil supply pump 2, and enters the engine fine filter 1. The diesel oil is directly filtered by the fine filter. Entering the diesel engine 7 participates in combustion work, and some diesel fuel that does not participate in combustion work flows back to the diesel tank through the return pipe.

As is known to all, large-scale machinery such as cranes consumes a large amount of diesel oil. However, with the uninterrupted oil energy, the amount of oil is decreasing year by year, and the price of diesel is also increasing, resulting in higher and higher use costs of cranes.

At the same time, due to the high sulfur content, high impurities and poor overall quality of domestic diesel, it is difficult to meet increasingly stringent emission regulations. And the price of high-quality diesel is several times higher than the price of ordinary diesel, and the cost of use is too high.

Therefore, how to provide an engine system which can reduce the use cost of the crane work and contribute to the protection of the environment is a technical problem to be solved by those skilled in the art.

Summary of the invention

It is an object of the present invention to provide an engine system that greatly reduces the cost of use of crane operations and is environmentally friendly. Another object of the present invention is to provide a A crane having the above engine system.

In order to solve the above technical problems, the present invention provides a natural gas engine including a gantry plate disposed between a crane cab and a turntable, a liquid storage tank for containing liquefied natural gas, and a vaporization assembly, the outlet of the liquid storage tank The vaporization assembly communicates with the intake of the natural gas engine.

Preferably, the liquid storage tank is fixed to the upper surface of the running plate by a first mounting bracket, which is located away from the central longitudinal surface of the running plate and close to the cab 31.

Preferably, the natural gas engine is located on a lower surface of the runway and is located adjacent to the crane cab.

Preferably, the vaporization assembly includes a vaporizer and a buffer tank, and the vaporizer and the buffer tank are arranged side by side on the surface of the running plate and placed at a position of a liquid outlet of the liquid storage tank.

Preferably, the utility model further comprises a gas storage tank containing high-pressure gasified natural gas, wherein an air outlet of the gas storage tank is connected to an air inlet of the natural gas engine through a pipeline, and the pipeline is further provided with a pressure reducing component and a connection or Close the valve of the line.

Preferably, the method further includes a reversing valve disposed on the intake port of the natural gas engine, the first intake port of the reversing valve being in communication with the air outlet of the vaporization assembly, and the second air inlet thereof An air outlet of the pressure reducing component is connected, an air outlet of the switching valve is connected to an air inlet of the natural gas engine; and when the switching valve is in a first working position, the first air inlet is The air port is connected; when the switching valve is in the second working position, the second air inlet is in communication with the air outlet σ.

Preferably, further comprising: a first collecting device, a controller and a display device; the first collecting device is configured to collect a liquid amount parameter of the liquefied natural gas in the liquid storage tank; Calculating the liquid amount, and determining the liquid amount and the preset minimum liquid amount. If the liquid amount is lower than the preset minimum liquid amount, controlling the reversing valve to be in the second working position; Controlling the reversing valve in the first working position; and the controller displays the collection information of the collecting device on a display screen of the display device.

Preferably, the second collecting device is configured to collect gas pressure parameters in each of the gas storage tanks, and the controller displays the gas pressure parameters on the display device Display.

Preferably, the transmitter is further included, the controller controls the transmitter to automatically perform a self-test before the crane is started, and displays the self-test result on the display screen of the display device. Preferably, the air tank is disposed on a side of an upper surface of the running plate between the crane cab and the turntable through a second mounting bracket, and is located near the turntable.

Preferably, the method further includes a third mounting bracket, the pressure reducing component includes a pressure reducer and a filter, and the pressure reducer, the filter, and the valve are integrally mounted on the third mounting bracket, The third mounting bracket is fixedly connected to the landing plate.

Preferably, the third mounting bracket is disposed on an upper surface of the running board between the crane cab and the turntable, and is located adjacent to the turntable and separated from the air tank on both sides of the running board .

In the invention, the engine system of the crane is provided with a liquefied (LNG) natural gas system composed of a natural gas engine, a storage tank for storing natural gas, and a vaporization component, and the liquefied natural gas is used as a fuel to meet the working needs of the crane, compared with diesel fuel. The fuel used in the invention is relatively rich in storage and relatively low in price, which can reduce the use cost of the crane. It has been proved that the use cost of the natural gas crane is more than 30% lower than that of the diesel crane.

On the other hand, natural gas is a clean energy source, which can greatly reduce the content of pollutants in the crane exhaust gas, which is conducive to environmental protection. In addition, natural gas has better anti-explosion performance and lower noise during operation.

In addition to the engine system described above, the present invention also provides a crane including a runway plate and an engine system disposed on the runway plate, the natural gas engine system being the engine system of any of the above embodiments.

Since the engine system has the above-described technical effects, the crane having the engine system also has the above effects.

DRAWINGS

1 is a schematic structural view of a typical diesel engine system in the prior art; FIG. 2 is a schematic structural view of a crane according to a specific embodiment of the present invention;

3 is a schematic structural view of an engine system according to a specific embodiment of the present invention;

Figure 4 is a partial plan view of Figure 3;

Figure 5 is a block diagram showing the connection of an engine system in a specific embodiment of the present invention;

6 is a schematic structural view of a specific embodiment of a pressure reducing component in an engine system of the present invention; Figure 7 is a right side view of the pressure reducing assembly of Figure 6.

Among them, the correspondence between the reference number and the part name in Figure 1 is as follows: 1 diesel fine filter, 2 engine oil supply pump, 3 engine oil inlet pipe, 4 return oil pipe, 5 coarse filter, 6 diesel fuel tank, 7 Diesel engines.

Among them, the correspondence between the reference numerals of Figure 2 to Figure 7 and the part names is as follows:

11 natural gas engine, 12 liquid storage tank, 13 vaporization module, 131 buffer tank, 132 vaporizer, 14 gas storage tank, 15 check valve, 161 pressure reducer, la pressure reducer mount, 16 pressure relief unit, 162 filter Cleaner, 2a filter mount, 17 reversing valve, 18 filter, 190 valve, 3a globe valve mount, 191 first shutoff valve, 192 second shutoff valve, 51 regulator, 52 pressure gauge, 20 First mounting bracket, 30 walkway, 31 cab, 32 turret, 33 main boom, 40 second mounting bracket, 50 third mounting bracket, 101 bolts. detailed description

The core of the present invention is to provide an engine system that greatly reduces the cost of use of the crane operation and is environmentally friendly. Another core of the present invention is to provide a crane having the above engine system.

In order to make those skilled in the art better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Please refer to FIG. 2. FIG. 2 is a schematic structural view of a crane according to a specific embodiment of the present invention. The present invention provides an engine system for a crane comprising a natural gas engine 11 disposed on a runway plate 30 between a cab 31 and a turntable 32 of a crane, a liquid storage tank 12 for containing liquefied natural gas, and a vaporization assembly 13, The outlet of the liquid storage tank 12 is connected to the intake port of the natural gas engine 11 via the vaporization unit 13.

The engine system of the crane of the present invention is provided with a liquefied (LNG) natural gas system composed of a natural gas engine 11, a storage tank 12 for storing natural gas, and a vaporization unit 13, and uses liquefied natural gas as a fuel to meet the working needs of the crane, compared with diesel. As a fuel, the fuel used in the present invention is relatively rich in storage and relatively low in price, and can reduce the use cost of the crane. It has been proved that the use cost of the natural gas crane is more than 30% lower than that of the diesel crane.

On the other hand, natural gas is a clean energy source that can greatly reduce pollutants in crane exhaust. The content of the product is conducive to environmental protection; in addition, the anti-explosion performance of natural gas is relatively good, and the noise generated during operation is relatively low.

Please refer to FIG. 3 together. FIG. 3 is a schematic top view of FIG.

In a specific embodiment, the liquid storage tank 12 can be fixed to the upper surface of the running plate 30 between the crane cab 31 and the turntable 32 by the first mounting bracket 20, which is located away from the running plate 30. The central longitudinal surface is adjacent to the cab; the upper surface of the platform 30 has a relatively large space, can accommodate a large volume of the liquid storage tank 12, and facilitates the installation of the liquid storage tank 12; The side position of the deck 30 can avoid interference with the main arm 33.

It should be noted that this article will be defined as the longitudinal direction along the length of the vehicle body.

A specific structural form of the first mounting bracket 20 is given herein. Taking the cross section of the liquid storage tank 12 as a circular shape, the first mounting bracket 20 includes a peripheral surface of the outer casing surrounding the liquid storage tank 12. The locking portion and the fixing portion that is connected to the locking portion and fixed to the running plate 30, and the fixing portion can be fixed to the running plate 30 by a bolt or the like.

In the above embodiments, the natural gas engine 11 may be located on the lower surface of the platform plate 30, which is located near the crane cab 31; the engine of the prior art diesel crane is mostly disposed on the lower surface of the platform plate 30 and close to the cab 31. Position, when the existing diesel crane is replaced with natural gas, the natural gas engine 11 and the diesel engine are substantially in the same position of the crane, so that the structure and position of the transmission components connected to the existing crane and the engine need not be changed, and the transformation cost is relatively low.

Specifically, the vaporization assembly 13 in each of the above embodiments includes a vaporizer 132 and a buffer tank 131. The vaporizer 132 and the buffer tank 131 are arranged side by side on the upper surface of the deck plate 30 and placed in the liquid storage tank 12. The outlet port position; this arrangement not only facilitates the arrangement of the piping between the vaporization assembly 13 and the reservoir tank 12, but also allows the buffer tank 131 to act as a buffer for transient use of the engine.

It is well known that crane products have a special use time. When there is no engineering development, the crane will be placed for a long time. At this time, for safety, the general liquid storage tank 12 is provided with a safety valve, and when the liquid storage tank 12 is liquefied natural gas When the air pressure reaches a certain pressure, the safety valve automatically opens to release part of the natural gas to the atmosphere. Therefore, after the crane is placed for a long time, the natural gas pressure in the liquid storage tank 12 will be small, and the engine starting is difficult, and often the long-term placement and start-up will cause damage to the engine components, so the present invention can also be set as follows. In the above embodiments, the engine system may further include a gas storage tank 14 containing high-pressure gasified natural gas, and an air outlet of the gas storage tank 14 is connected to an air inlet of the natural gas engine 11 through a pipeline, and the pipeline is further disposed. There is a pressure relief assembly and a valve 190 that connects or closes the line.

In this embodiment, the gas storage tank 14 and the pressure reducing component constitute a vaporization (CNG) natural gas system, and the fuel, when the natural gas liquid level in the liquid storage tank 14 is relatively low, is insufficient to support the operation of the natural gas engine 11, the gasification natural gas system is turned on. The valve in the gas supply gas to the natural gas engine 11 using the gasified natural gas stored in the gas storage tank 14. In this way, the crane is equipped with two independent energy systems to provide energy for the natural gas engine 11, which increases the reliability of the crane work.

Referring again to FIG. 2, further, the engine system may further include a reversing valve 17 disposed on the intake port of the natural gas engine 11, and the first intake port of the reversing valve 17 is in communication with the air outlet of the vaporization assembly 13. The second air inlet communicates with the air outlet of the pressure reducer, and the air outlet of the reversing valve 17 communicates with the air inlet of the natural gas engine 11; when the reversing valve 17 is in the first working position, the first air inlet and the outlet The port is connected; when the reversing valve 17 is in the second working position, the second inlet is in communication with the outlet.

In order to realize the automation of the mechanical control, each of the above engine systems may further comprise a collecting device for collecting the liquid amount parameter of the liquefied natural gas in the liquid storage tank 12; the controller calculating the liquid amount according to the liquid amount parameter, and determining the liquid And the amount of the preset minimum liquid amount, if the liquid amount is lower than the preset minimum liquid amount, controlling the reversing valve 17 to be in the second working position; otherwise, controlling the reversing valve 17 to be in the first working position, And the controller displays the collection information of the collection device on the display screen of the display device, so that the operator can better understand the operation of the crane engine system.

Further, the engine system in the above embodiment may further include a second collecting device, wherein the second collecting device is configured to collect gas pressure parameters in each of the gas storage tanks 14, and the controller displays the gas pressure parameters on the The display of the display unit.

In a preferred embodiment, in order to ensure the safety and reliability of the crane operation, the engine system further includes a transmitter connected between the first collecting device, the second collecting device and the display device, in the natural gas engine Before operation, the controller controls the transmitter to automatically perform a self-test and display the self-test results on the display of the display unit.

A specific form of a display device is provided herein, and the display device is displayed in each of the above embodiments. A status indicator is set on the display screen. When the status indicator is flashing, it indicates that the liquid level tick mark is lower than the liquid level warning line; the status indicator flashes to remind the user to add liquid in time; when the status indicator is constantly lit In the status, it means that the main transmitter and display are not connected correctly, the status indicator is always on, and the others are not displayed.

Self-test process: When the power is turned on, the power indicator and status indicator are on, and the transmitter automatically enters the self-test. After about 3 seconds, the status indicator is off, indicating that the self-test passed; the status indicator is not off, indicating that the self-test failed. After the self-test is completed, the transmitter automatically enters the cylinder data collection process.

Further, in order to ensure the cleanliness of the natural gas entering the natural gas engine 11, a filter 18 may be installed between the reversing valve 17 and the natural gas engine 11.

In each of the above embodiments, the check valve of the pressure reducing component and the second air inlet is provided with a check valve

15, so that natural gas flows from the decompression component to the second air inlet in one direction; this can further prevent the natural gas overflow in the gas storage tank 14 with relatively high air pressure from entering the liquid storage tank 12 with relatively low air pressure, affecting the work of the two systems. performance.

In the above embodiments, the air tank 14 can be disposed on the upper surface side of the deck 30 between the crane cab 31 and the turntable 32 via the second mounting bracket 40, which is located near the turntable 32.

In a preferred embodiment, the engine system may further include a third mounting bracket 50, the pressure reducer 161, the filter 162, and the valve 190 are integrally mounted to the third mounting bracket 50, and the third mounting bracket 50 is The table top 30 is fixedly connected, and the two can be fixedly connected by bolts, or can be fixedly connected to the stage board 30 by means of screws or the like or by welding.

In this mode, the integrated mount for each component can complete the pressure reducer in the gas storage system in advance.

161. Assembly of parts such as filter 162 and valve 190 is beneficial to improve assembly efficiency.

Specifically, the third mounting bracket 50 may have a cross arm and a vertical wall, and the small wall and the vertical wall of the third mounting bracket 50 may be respectively welded with a plurality of small mounts for fixing the pressure reducer 161 and the filter.

162 and the shut-off valve, the corresponding mounts of the pressure reducer 161, the filter 162 and the valve 190 in Fig. 6 and Fig. 7 are the pressure reducer mount la, the filter mount 2a, the shutoff valve mount, respectively.

3a. In a preferred embodiment, the third mounting bracket may be disposed on the upper surface of the platform 30 between the crane cab 31 and the turntable 32, and is located adjacent to the turntable 32 and The gas storage tank 14 is divided on both sides of the running plate 30; this can facilitate the connection of the pipeline between the gas storage tank 14 and the pressure reducing component

The above-mentioned natural gas storage tank 12, the gas storage tank 14, and the piping for natural gas circulation can use steel pipes.

Further, the engine control system of each of the above embodiments can further increase the filter 162 having different filtration accuracy to further filter the natural gas entering the natural gas engine 11 to improve the service life of the natural gas engine 11. Regulators such as regulators 51 and pressure gauges 52 can be installed in the LNG and gasification systems to increase the pressure stability on the natural gas pipeline.

Additional control components, such as valve 190 and second shut-off valve 192, can be added to the engine system to facilitate control of the LNG intake gas path and the LNG intake gas path, depending on the needs of the system.

In addition, the liquefied natural gas system composed of the natural gas engine 11 and the liquid storage tank 12 in the engine system and the gasification natural gas system composed of the natural gas engine 11 and the gas storage tank 14 may be connected to the same cooling source. Realization, the arrangement in a specific embodiment of the cooling water passage C1 is also shown in Fig. 5, wherein a1 and bl respectively represent a gasified natural gas intake pipe and a liquefied natural gas intake pipe.

For other information on cranes, please refer to the prior art and will not be repeated here.

The above description of a crane and its engine system provided by the present invention is described in detail. The description of the examples is only to assist in understanding the method of the present invention and its core idea. It should be noted that those skilled in the art can make various modifications and changes to the present invention without departing from the spirit and scope of the invention.

Claims

Rights request

An engine system for a crane, comprising: a natural gas engine (11) disposed on a running plate (30) between a crane cab (31) and a turntable (32) for holding liquefied natural gas a liquid storage tank (12) and a vaporization assembly (13), the outlet of the liquid storage tank (12) being connected to an intake port of the natural gas engine (11) via the vaporization assembly (13).

2. An engine system according to claim 1 wherein said vaporization assembly (13) comprises a vaporizer (132) and a buffer tank (131), said liquid storage tank, said vaporizer, said buffer tank The vaporizer (132) and the buffer tank (131) are arranged side by side on the surface of the running plate and placed at a position of the liquid outlet of the liquid storage tank (12).

3. The engine system according to claim 2, wherein the liquid storage tank (12) is supported and fixed to an upper surface of the running plate (30) by a first mounting bracket, the position of which is away from the The central longitudinal plane of the deck is adjacent to the cab (31).

4. An engine system according to claim 2, characterized in that the natural gas engine (11) is located on the lower surface of the landing plate (30) and is located close to the crane cab (31).

The engine system according to any one of claims 1 to 4, further comprising a gas storage tank (14) containing high-pressure gasified natural gas, the gas outlet of the gas storage tank (14) passing through the tube a road connecting the air inlet of the natural gas engine (11), and the pipeline is further provided with a pressure reducing component

(16) and the valve (190) that connects or closes the line.

6. The engine system according to claim 5, further comprising a reversing valve (17) disposed on an intake port of the natural gas engine (11), the reversing valve (17) a first air inlet is connected to an air outlet of the vaporization assembly (13), a second air inlet is connected to an air outlet of the pressure reducing assembly (16), and an air outlet of the switching valve (17) is connected. An intake port of the natural gas engine (11); when the reversing valve (17) is in a first working position, the first intake port is in communication with the air outlet; when the reversing valve (17) When the second working position is in the second working position, the second air inlet is in communication with the air outlet.

7. The engine system according to claim 6, further comprising: a first collecting device, a controller, and a display device; wherein the first collecting device is configured to collect the liquid storage tank (12) The liquid amount parameter of the liquefied natural gas; the controller calculates the liquid amount according to the liquid amount parameter, and determines the liquid amount and the preset minimum liquid amount, if the liquid amount is lower than the preset minimum liquid amount, Then Controlling the reversing valve (17) to be in the second working position; otherwise, controlling the diverting valve (17) to be in the first working position, and the controller is to collect the collection device Information is displayed on the display screen of the display device.

The engine system according to claim 7, further comprising a second collecting device, wherein the second collecting device is configured to collect gas pressure parameters in each of the gas storage tanks (14) The controller displays the gas pressure parameter on a display screen of the display device.

9. The engine system of claim 7 further comprising a transmitter coupled between the first collector device, the second collector device and the display device, prior to operation of the natural gas engine The controller controls the transmitter to automatically perform a self-test, and displays the self-test result on a display screen of the display device.

The engine system according to claim 5, wherein the air tank (14) is hoisted to the side of the upper surface of the running plate (30) by a second mounting bracket, and the position thereof is close to Turntable.

11. The engine system of claim 5, further comprising a third mounting bracket fixedly coupled to the landing plate (30), the decompression assembly (16) including a pressure reducer (161) And a filter (162), the pressure reducer (161), the filter (162), and the valve (190) are integrally mounted on the third mounting bracket.

12. The engine system according to claim 11, wherein the third mounting bracket is disposed on a lower surface of the landing plate (30), the position of which is adjacent to the turntable (32) and A gas storage tank (14) is separated from both sides of the landing plate (30).

13. A crane comprising a frame and an engine system disposed on the landing plate (30), wherein the natural gas engine system is the engine system of any one of claims 1 to 12.