CN211038779U - Forklift exhaust system - Google Patents
Forklift exhaust system Download PDFInfo
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- CN211038779U CN211038779U CN201921596282.0U CN201921596282U CN211038779U CN 211038779 U CN211038779 U CN 211038779U CN 201921596282 U CN201921596282 U CN 201921596282U CN 211038779 U CN211038779 U CN 211038779U
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- tail gas
- treatment assembly
- gas treatment
- mounting bracket
- forklift
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Exhaust Gas After Treatment (AREA)
Abstract
The utility model discloses a fork truck exhaust system, which comprises a tail gas treatment assembly; the DOC device and the DPF device are sequentially arranged in the tail gas treatment assembly, and the pressure difference component used for monitoring the tail gas purification pressure and the temperature control component used for monitoring the tail gas purification temperature are arranged outside the tail gas treatment assembly; the pressure difference assembly and the temperature control assembly are connected with a central controller of the engine through signals. The utility model discloses it is continuous with the gas vent of air inlet through preceding exhaust pipe and engine of tail gas treatment assembly, the gas outlet links to each other with the back blast pipe, make the waste gas of engine get into the inside back of tail gas treatment assembly through preceding exhaust pipe, can take place redox reaction through diesel oxidation catalyst device in proper order, reduce NOx content in the waste gas, fully burn and filter the PM particulate matter that contains in the waste gas through diesel engine particle trapper etc. finally make the gas after the purification discharge through the back blast pipe, ensure that waste gas can satisfy the emission requirement after purification treatment.
Description
Technical Field
The utility model relates to a fork truck technical field specifically is a fork truck exhaust system.
Background
At present, with the situation of global environmental pollution becoming more serious, the requirements for the discharge of pollutants from internal combustion engines at home and abroad are increasing continuously. In particular, emission requirements are more strict on the content of pollutants such as HC, CO, NOx, and PM particles contained in exhaust gas emitted from an internal combustion engine.
The exhaust system of the forklift is used as a main constituent system for influencing pollutant emission of the forklift, and in order to eliminate or reduce the emission of total harmful components of the internal combustion engine, improvement on the constituent structure and the whole layout is urgently needed so as to meet the requirement that when the forklift operates under the working conditions of low idle speed and low load, the exhaust system of the forklift can realize the automatic regeneration function under a certain temperature condition, further reduce parking regeneration of the forklift and reduce the operation intensity of the forklift.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a fork truck exhaust system to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
a forklift exhaust system comprises a tail gas treatment assembly, wherein a gas inlet of the tail gas treatment assembly is communicated with a gas outlet of an engine through a front exhaust pipe, a gas outlet of the tail gas treatment assembly is communicated with a rear exhaust pipe, and purified forklift tail gas is exhausted into the atmosphere;
the DOC device and the DPF device are sequentially arranged in the tail gas treatment assembly, and the pressure difference component used for monitoring the tail gas purification pressure and the temperature control component used for monitoring the tail gas purification temperature are arranged outside the tail gas treatment assembly;
the pressure difference assembly and the temperature control assembly are connected with a central controller of the engine through signals.
As a further aspect of the present invention: the tail gas treatment assembly is arranged on a forklift frame through a fixed mounting bracket;
the fixed mounting bracket is provided with more than one.
As a further aspect of the present invention: the gas inlet of the tail gas treatment assembly is vertically arranged upwards, and the gas outlet of the tail gas treatment assembly is vertically arranged downwards;
the air inlet is communicated with the front exhaust pipe through a first mounting flange, and the air outlet is communicated with the rear exhaust pipe through a second mounting flange.
As a further aspect of the present invention: the front exhaust pipe is of a multi-section tubular structure which is provided with a corrugated pipe and is wrapped with an insulating layer on the outer side of the circumference;
the corrugated pipe is provided with more than one section.
As a further aspect of the present invention: the differential pressure assembly comprises a first mounting bracket and a differential pressure sensor, wherein the first mounting bracket is mounted on the fixed mounting bracket through a fastener, and the differential pressure sensor is mounted on the first mounting bracket;
the pressure difference sensor is provided with a first pressure measuring line for monitoring pressure at the inlet end of the DPF device and a second pressure measuring line for monitoring pressure at the outlet end of the DPF device.
As a further aspect of the present invention: the temperature control assembly comprises a second mounting bracket and a temperature sensor, wherein the second mounting bracket is mounted on the first mounting bracket through a fastener, and the temperature sensor is mounted on the second mounting bracket;
the second mounting bracket is provided with more than three temperature sensors which are fixed on the second mounting bracket through buckles.
As a further aspect of the present invention: and the differential pressure sensor and the temperature sensor are in signal transmission with a central controller of the engine.
As a further aspect of the present invention: the temperature sensor comprises a first temperature sensor used for monitoring the temperature of the inlet end of the DOC device, a second temperature sensor used for monitoring the temperature of the inlet end of the DPF device, and a third temperature sensor used for monitoring the temperature of the outlet end of the DPF device.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) connecting an air inlet of the tail gas treatment assembly with an exhaust port of an engine through a front exhaust pipe, connecting an air outlet of the tail gas treatment assembly with a rear exhaust pipe, and sequentially arranging a diesel oxidation catalyst device and a diesel particle catcher in the tail gas treatment assembly, so that after waste gas of the engine enters the tail gas treatment assembly through the front exhaust pipe, oxidation-reduction reaction can be sequentially carried out through the diesel oxidation catalyst device, the content of NOx in the waste gas is reduced, the waste gas is fully combusted through the diesel particle catcher, PM particles and the like contained in the waste gas are filtered, finally, the purified gas is discharged through the rear exhaust pipe, and the waste gas can meet the emission requirement after being purified;
(2) the central controller of the engine starts an engine fuel injection system to work according to a monitoring result and adopts a post-oil injection mode to burn so as to improve the pressure and temperature of the DOC device, so that when the forklift operates under the working conditions of low idle speed and low load, an exhaust system of the forklift can realize an automatic regeneration function under a certain temperature condition, further the parking regeneration of the forklift is reduced, and the operation intensity of the forklift is reduced;
(3) the tail gas treatment assembly is fixedly arranged on a forklift frame through a fixed mounting bracket, the pressure difference assembly is fixedly arranged on the fixed mounting bracket through a first mounting bracket, the temperature control assembly is fixed on the first mounting bracket through a quick buckle of a second mounting bracket, the mounting position of the tail gas treatment assembly on the forklift frame, the mounting position of the pressure difference assembly on the fixed mounting bracket, the mounting position of the temperature control assembly on the first mounting bracket and the like can be adjusted according to actual use requirements, the tail gas treatment assembly is firm and reliable to mount, and is quick and simple to dismount; meanwhile, the pressure difference component, the temperature control component and the like are flexibly distributed on the tail gas treatment assembly, the pressure difference component and the temperature control component can be matched with a DOC device and a DPF device in the tail gas treatment assembly for use, the content of each pollutant in purified gas is further reduced, the automatic regeneration function can be realized when the forklift operates under the working conditions of low idle speed and low load, the ash removal period of the DPF device in the tail gas treatment assembly is prolonged, and the operation intensity of the forklift is reduced.
Drawings
Fig. 1 is a schematic structural view of a forklift exhaust system of the present invention;
FIG. 2 is a schematic structural view of the tail gas treatment assembly of the present invention;
fig. 3 is a schematic structural view of the fixing and mounting bracket of the present invention;
fig. 4 is a schematic structural view of a first mounting bracket of the present invention;
fig. 5 is a schematic structural view of a second mounting bracket of the present invention.
In the figure:
1-tail gas treatment assembly, 11-gas inlet, 12-gas outlet and 13-fixed mounting bracket;
101-a first mounting flange, 102-a second mounting flange;
2-front exhaust pipe, 21-corrugated pipe;
3-rear exhaust pipe;
4-differential pressure assembly, 41-first mounting bracket, 42-differential pressure sensor;
401-a first voltage measuring line, 402-a second voltage measuring line;
5-temperature control component, 51-second mounting bracket, 52-temperature sensor, 521-first temperature sensor, 522-second temperature sensor and 523-third temperature sensor.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, a forklift exhaust system comprises a tail gas treatment assembly 1, wherein a gas inlet 11 of the tail gas treatment assembly 1 is communicated with a gas outlet of an engine through a front exhaust pipe 2, a gas outlet 12 is communicated with a rear exhaust pipe 3, and purified forklift tail gas is exhausted into the atmosphere; the DOC device and the DPF device are sequentially arranged in the tail gas treatment assembly 1, and the pressure difference component 4 for monitoring the tail gas purification pressure and the temperature control component 5 for monitoring the tail gas purification temperature are arranged outside the tail gas treatment assembly; the differential pressure component 4 and the temperature control component 5 are connected with a central controller of the engine through signals.
An air inlet 11 of a tail gas treatment assembly 1 of a forklift exhaust system is communicated with an exhaust port of an engine, a DOC device and a DPF device are sequentially arranged in the tail gas treatment assembly 1, a differential pressure component 4 and a temperature control component 5 are arranged outside the tail gas treatment assembly, and the differential pressure component 4 and the temperature control component 5 which are arranged outside are in signal connection and transmission with a central controller of the engine; when the exhaust gas purification device is used specifically, exhaust gas of an engine enters the tail gas treatment assembly 1 through the front exhaust pipe 2, the exhaust gas is sequentially purified through the DOC device and the DPF device in the tail gas treatment assembly 1, and the purified gas is discharged through the rear exhaust pipe 3 of the tail gas treatment assembly 1. The DOC device arranged in the tail gas treatment assembly 1 is a diesel oxidation catalyst device, and the DPF device is a diesel particle catcher; waste gas is when purifying through DOC device and DPF device inside the tail gas treatment assembly 1, the pressure differential subassembly 4 and the temperature control subassembly 5 that set up in the outside of tail gas treatment assembly 1 use with DOC device and DPF device cooperation, pressure differential subassembly 4 and temperature control subassembly 5 real-time supervision DOC device entry end, exit end and DPF device entry end, the pressure and the temperature etc. of exit end, and with monitoring result timely signal transmission to the central controller of engine, the central controller of engine decides whether to carry out combustion processing according to the monitoring result, and the different regeneration scheme of decision DPF, ensure that waste gas purifies through tail gas treatment assembly 1, pollutant content such as HC in the waste gas, CO, NOx and PM particulate matter can satisfy the emission requirement, make fork truck can realize automatic regeneration function when running under low idle speed, low load operating mode.
Referring to fig. 1 and 2, the exhaust gas treatment assembly 1 is mounted on a forklift frame through a fixed mounting bracket 13; more than one fixed mounting bracket 13 is arranged.
The gas inlet 11 of the tail gas treatment assembly 1 is vertically arranged upwards, and the gas outlet 12 is vertically arranged downwards; the air inlet 11 is communicated with the front exhaust pipe 2 through a first mounting flange 101, and the air outlet 12 is communicated with the rear exhaust pipe 3 through a second mounting flange 102.
The front exhaust pipe 2 is of a multi-section tubular structure which is provided with a corrugated pipe 21 and is wrapped with an insulating layer on the outer side of the circumference; the corrugated pipe 21 is provided with more than one section.
During specific installation, the tail gas treatment assembly 1 is fixedly installed on a forklift frame through a fixed installation support 13, the fixed installation support 13 is installed at a proper position on the forklift frame through fasteners such as bolts, nuts and the like, and the installation position of the fixed installation support 13 on the forklift frame can be adjusted according to actual needs; after the fixed mounting support 13 is mounted on the forklift frame, the tail gas treatment assembly 1 is tightly mounted on the fixed mounting support 13 through fasteners such as bolts, and the gas inlet 11 and the gas outlet 12 of the tail gas treatment assembly 1 can rotate according to actual use requirements so as to realize direction adjustment of the tail gas treatment assembly.
Preferably, the gas inlet 11 of the tail gas treatment assembly 1 is vertically upward, the gas outlet 12 is vertically downward, a first mounting flange 101 is arranged at the gas inlet 11 end of the tail gas treatment assembly 1, a second mounting flange 102 is arranged at the gas outlet 12 section, the first mounting flange 101 is connected with one end of the front exhaust pipe 2 through a connecting piece composed of bolts and nuts, the second mounting flange 102 is connected with one end of the rear exhaust pipe 3, so that the front exhaust pipe 2 is communicated with the gas inlet 11 of the tail gas treatment assembly 1, the rear exhaust pipe 3 is communicated with the gas outlet 12 of the tail gas treatment assembly 1, it is ensured that the waste gas of the engine can smoothly enter the tail gas treatment assembly 1 through the front exhaust pipe 2 for purification, and the purified gas is discharged through the rear exhaust pipe 3.
The front exhaust pipe 2 is preferably set to be a multi-section tubular structure which is provided with a corrugated pipe 21 and is wrapped with an insulating layer on the outer side of the circumference, the arranged corrugated pipe 21 can be used for absorbing the vibration of the engine, and the front exhaust pipe 2 can be effectively prevented from being torn to a great extent; the heat-insulating layer wrapped on the outer side of the circumference of the front exhaust pipe 2 is made of heat-insulating materials, the heat-insulating layer wrapped on the outer side of the circumference of the front exhaust pipe 2 can effectively keep the exhaust temperature of the front exhaust pipe 2, and ensure that the temperature of the exhaust gas is not higher than 25 ℃ when the exhaust gas passes through the front exhaust pipe 2 from an exhaust port of an engine to an air inlet 11 of the exhaust gas treatment assembly 1, so that the purification effect of the exhaust gas entering the exhaust gas treatment assembly 1 is improved.
Referring to fig. 3, the fixed mounting bracket 13 is an integrated structure including a horizontal bracket and a vertical bracket, the horizontal bracket and the vertical bracket of the fixed mounting bracket 13 are perpendicular to each other, an arc-shaped notch adapted to the external contour of the exhaust gas treatment assembly 1 is formed in the upper portion of the vertical bracket, the arc-shaped notch on the vertical bracket is clamped outside the exhaust gas treatment assembly 1 and is fixedly connected with the exhaust gas treatment assembly 1 through a connecting piece composed of a bolt, a nut and the like, a through hole is formed in the horizontal bracket, the through hole in the horizontal bracket is arranged along the diagonal of the horizontal bracket, and the fixed mounting bracket 13 is fixedly mounted on the frame of the forklift through a fastening piece such as a bolt penetrating through the through hole. The firmness and the reliability of the tail gas treatment assembly 1 on the forklift frame are ensured by arranging the arc-shaped notch on the vertical support, connecting the vertical support with the tail gas treatment assembly 1 through the connecting piece, and fixedly installing the horizontal support on the forklift frame through the through hole arranged on the horizontal support and the fastening piece.
Referring to fig. 1 and 2, the differential pressure assembly 4 includes a first mounting bracket 41 mounted on the fixed mounting bracket by a fastener, and a differential pressure sensor 42 mounted on the first mounting bracket; the differential pressure sensor 42 is provided with a first pressure measurement line 401 for monitoring the pressure at the inlet end of the DPF device and a second pressure measurement line 402 for monitoring the pressure at the outlet end of the DPF device.
Pressure at the inlet end of the DPF device is monitored through the first pressure measuring line 401, pressure at the outlet end of the DPF device is monitored through the second pressure measuring line 402, signal transmission is carried out between the pressure difference sensor 42 and a central controller of an engine, monitoring of PM particulate matter accumulation amount in the DPF device is achieved, when the pressure monitored through the first pressure measuring line 401 and/or the second pressure measuring line 402 exceeds a preset value, the central controller of the engine controls the engine fuel injection system to work, the engine fuel injection system is enabled to adopt a post-fuel injection mode, exhaust temperature in the DPF device is improved, and sufficient combustion of the accumulated PM particulate matter is achieved.
Referring to fig. 4, the differential pressure component 4 is fixedly mounted on the first mounting bracket 41 through a bolt, and the first mounting bracket 41 is connected with the fixed mounting bracket 13 through a connecting member composed of a bolt, a nut, and the like, so as to ensure the firmness and stability of the mounting of the differential pressure component 4 outside the exhaust gas treatment assembly 1; meanwhile, the installation and the disassembly of the differential pressure assembly 4 are convenient.
One end of the first mounting bracket 41 is connected with the fixed mounting bracket 13, and a special-shaped hole with the same outline as the second mounting bracket 51 is formed in the first mounting bracket 41 outside the exhaust gas treatment assembly 1.
Referring to fig. 5, the outline of the second mounting bracket 51 is consistent with the shape of the special-shaped hole formed in the first mounting bracket 41, so that each temperature sensor 52 of the temperature control assembly 5 can be fixed on the first mounting bracket 41 by the second mounting bracket 51 in a snap-fit manner, and thus, the temperature sensors 52 can be conveniently mounted and dismounted on the first mounting bracket 41 by the second mounting bracket 51, and the dismounting efficiency of the temperature sensors 52 is improved.
The temperature control assembly 5 comprises a second mounting bracket 51 mounted on the first mounting bracket through a fastener, and a temperature sensor 52 mounted on the second mounting bracket; the second mounting bracket 51 is provided with more than three temperature sensors 52, and the temperature sensors are fixed on the second mounting bracket 51 through buckles.
The temperature sensor 52 includes a first temperature sensor 521 for monitoring the temperature at the inlet end of the DOC device, a second temperature sensor 522 for monitoring the temperature at the inlet end of the DPF device, and a third temperature sensor 523 for monitoring the temperature at the outlet end of the DPF device.
The differential pressure sensor 42 and the temperature sensor 52 are in signal communication with a central controller of the engine.
Monitoring the temperature at the inlet end of the DOC device through a first temperature sensor 521, wherein when the temperature at the inlet end of the DOC device exceeds 250 ℃, the temperature of the exhaust gas activates an oxidation catalyst to purify NOx in the exhaust gas; when the temperature of the inlet end of the DOC device is lower than 250 ℃, the central controller of the engine controls the engine to work, so that the fuel injection system of the engine adopts a post-injection mode, the post-injected fuel is combusted in the DOC device to realize the temperature rise of the inlet end of the DOC device until the temperature of the inlet end of the DOC device exceeds 250 ℃, and the temperature of the exhaust gas can activate the oxidation catalyst to carry out oxidation-reduction reaction so as to reduce the content of NOx in the exhaust gas.
The temperature of the inlet end of the DPF device is monitored through the second temperature sensor 522, the temperature of the outlet end of the DPF device is monitored through the third temperature sensor 523, when the temperature of exhaust gas at the inlet end of the DPF device reaches 550-600 ℃, the exhaust gas is fully combusted in the DOC device and regenerated, so that the content of PM particles in the exhaust gas is reduced, meanwhile, the DOC device filters the purified gas, the content of the PM particles in the purified gas is further reduced, the automatic regeneration function can be realized when the forklift operates under the working conditions of low idling and low load, the ash cleaning period of the DPF device in the tail gas treatment assembly 1 is prolonged, parking regeneration is reduced to a certain extent, and the operation intensity of the forklift is reduced.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. A forklift exhaust system comprises a tail gas treatment assembly (1), wherein a gas inlet (11) of the tail gas treatment assembly (1) is communicated with a gas outlet of an engine through a front exhaust pipe (2), a gas outlet (12) is communicated with a rear exhaust pipe (3) and discharges purified forklift tail gas into the atmosphere; the method is characterized in that:
a DOC device and a DPF device are sequentially arranged in the tail gas treatment assembly (1), a pressure difference component (4) used for monitoring the tail gas purification pressure and a temperature control component (5) used for monitoring the tail gas purification temperature are arranged outside the tail gas treatment assembly;
the pressure difference component (4) and the temperature control component (5) are in signal connection with a central controller of the engine.
2. The forklift exhaust system of claim 1, wherein: the tail gas treatment assembly (1) is arranged on a forklift frame through a fixed mounting bracket (13);
more than one fixed mounting bracket (13) is arranged.
3. The forklift exhaust system of claim 2, wherein: the gas inlet (11) of the tail gas treatment assembly (1) is vertically arranged upwards, and the gas outlet (12) is vertically arranged downwards;
the air inlet (11) is communicated with the front exhaust pipe (2) through a first mounting flange (101), and the air outlet (12) is communicated with the rear exhaust pipe (3) through a second mounting flange (102).
4. The forklift exhaust system of claim 3, wherein: the front exhaust pipe (2) is of a multi-section tubular structure which is provided with a corrugated pipe (21) and is wrapped with an insulating layer on the outer side of the circumference;
the corrugated pipe (21) is provided with more than one section.
5. The forklift exhaust system of claim 2, wherein: the differential pressure assembly (4) comprises a first mounting bracket (41) and a differential pressure sensor (42), wherein the first mounting bracket is mounted on the fixed mounting bracket through a fastener;
the differential pressure sensor (42) is provided with a first pressure measuring line (401) for monitoring the pressure at the inlet end of the DPF device, and a second pressure measuring line (402) for monitoring the pressure at the outlet end of the DPF device.
6. The forklift exhaust system of claim 5, wherein: the temperature control assembly (5) comprises a second mounting bracket (51) mounted on the first mounting bracket through a fastener, and a temperature sensor (52) mounted on the second mounting bracket;
the number of the second mounting brackets (51) is more than three, and the temperature sensors (52) are fixed on the second mounting brackets (51) through buckles.
7. The forklift exhaust system of claim 6, wherein: the differential pressure sensor (42) and the temperature sensor (52) are in signal transmission with a central controller of the engine.
8. The forklift exhaust system according to claim 6 or 7, wherein: the temperature sensor (52) includes a first temperature sensor (521) for monitoring temperature at an inlet end of the DOC device, a second temperature sensor (522) for monitoring temperature at an inlet end of the DPF device, and a third temperature sensor (523) for monitoring temperature at an outlet end of the DPF device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921596282.0U CN211038779U (en) | 2019-09-24 | 2019-09-24 | Forklift exhaust system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921596282.0U CN211038779U (en) | 2019-09-24 | 2019-09-24 | Forklift exhaust system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211038779U true CN211038779U (en) | 2020-07-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921596282.0U Active CN211038779U (en) | 2019-09-24 | 2019-09-24 | Forklift exhaust system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211038779U (en) |
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2019
- 2019-09-24 CN CN201921596282.0U patent/CN211038779U/en active Active
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