Engine tail gas heat recovery device, preheating system and engineering equipment

Abstract

The utility model provides an engine tail gas heat recovery device, a preheating system and engineering equipment. The recovery device comprises a three-way valve and a steering control motor in driving connection with the three-way valve. A first connector of the three-way valve is used for being connected with the rear end of an engine aftertreatment device, a second connector of the three-way valve is used for exhausting tail gas, and a third connector of the three-way valve is used for being connected with a preheating pipeline to provide a heat source for a preheating system. The steering control motor is used for controlling a valve element of the three-way valve to operably enable the first connector to be communicated with the second connector or enable the first connector to be communicated with the third connector; the preheating system comprises a preheating pipeline and the engine tail gas heat recovery device, whether tail gas heat recovery is conducted or not can be switched according to the working environment, the recovered heat serves as a preheating heat source, and the purpose of saving energy is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering machinery, in particular to an engine exhaust heat recovery device, a preheating system and engineering equipment. Background Art

[0002] Some engineering equipment needs to operate in extremely cold conditions. To ensure the normal operation of the equipment, it is usually necessary to set up an additional heating system or preheating system to continuously preheat the engine power source of the equipment. Although this can achieve the purpose of normal operation of the equipment, it consumes a lot of energy.

[0003] Although the existing engine exhaust heat recovery device can achieve heat recovery, when operating under normal conditions, there is no need to preheat the engineering equipment, and the recovered heat is not effectively utilized at this time; the conventional practice is to remove the engine exhaust heat recovery device and then install it when needed, but it is easy to cause loss or damage after removal, which is very inconvenient.

[0004] Therefore, there is an urgent need for an engine exhaust heat recovery device, preheating system and engineering equipment that can switch whether to recover exhaust heat according to the working environment and use the recovered heat as a preheating heat source to achieve energy saving. Utility Model Content

[0005] The purpose of the utility model is to provide an engine exhaust heat recovery device, a preheating system and engineering equipment, aiming to solve the technical problems that traditional engine exhaust heat recovery devices are inconvenient to switch according to the working environment and have high preheating energy consumption.

[0006] To achieve the above-mentioned object, in a first aspect, the present invention provides an engine exhaust heat recovery device, comprising a three-way valve, a steering control motor drivingly connected to the three-way valve;

[0007] The first interface of the three-way valve is used to connect to the rear end of the engine after-treatment device, the second interface of the three-way valve is used to discharge exhaust gas, and the third interface of the three-way valve is used to connect to the preheating pipeline to provide a heat source for the preheating system;

[0008] The steering control motor is used to control the valve core of the three-way valve to operably connect the first interface with the second interface, or connect the first interface with the third interface.

[0009] As a further improvement of the above solution, an air intake pipe is connected to the first interface for connecting to the rear end of the engine after-processing device.

[0010] As a further improvement of the above solution, an exhaust hood is connected to the second interface to discharge the engine exhaust.

[0011] As a further improvement of the above solution, a supercharger is connected to the third interface for supercharging the collected exhaust gas for later use; preferably, the supercharger is a turbocharger.

[0012] In a second aspect, the present invention further provides a preheating system, comprising a preheating pipeline and the engine exhaust heat recovery device provided in the first aspect; the heat inlet of the preheating pipeline is connected to the third interface of the engine exhaust heat recovery device via an electromagnetic connecting valve;

[0013] The preheating pipeline includes a preheating main pipe and a plurality of preheating branch pipes connected to the preheating main pipe, wherein the plurality of preheating branch pipes are arranged on the preheating main pipe at intervals, and the preheating branch pipes are provided with air nozzles for spraying hot air toward the component to be preheated;

[0014] The preheating pipeline also includes a temperature sensor, which is communicatively connected to the steering control motor and the electromagnetic connecting valve respectively.

[0015] As a further improvement of the above solution, the temperature sensor is arranged around the component to be preheated, and is used to monitor the temperature information of the hot air ejected by the air nozzle so as to control the opening of the three-way valve of the engine exhaust heat recovery device.

[0016] As a further improvement of the above solution, the preheating pipeline also includes a smoke sensor, which is communicatively connected to the steering control motor of the engine exhaust heat recovery device.

[0017] As a further improvement of the above solution, the smoke sensor is arranged around the component to be preheated, and is used to monitor the diffusion information of the hot gas ejected by the air nozzle so as to control the opening of the three-way valve of the engine exhaust heat recovery device.

[0018] In a third aspect, the present invention further provides an engineering equipment, comprising the preheating system provided in the second aspect.

[0019] Since the utility model adopts the above technical solution, the beneficial effects of this application are:

[0020] 1. The utility model provides an engine exhaust heat recovery device, comprising a three-way valve and a steering control motor drivingly connected to the three-way valve; a first interface of the three-way valve is used to be connected to the rear end of an engine after-treatment device, a second interface of the three-way valve is used to discharge exhaust gas, and a third interface of the three-way valve is used to be connected to a preheating pipeline to provide a heat source for a preheating system; the steering control motor is used to control the valve core of the three-way valve to operably connect the first interface with the second interface, or to connect the first interface with the third interface; the utility model arranges a three-way valve at the rear end of the engine after-treatment device, and controls the communication channel of the three-way valve through the steering control motor. With such an arrangement, the engine exhaust heat can be directly selected according to the environment in which the engineering equipment is located. The heat of the engine exhaust is directly discharged or recovered for utilization. Specifically, under a conventional operating environment, the steering control motor controls the movement of the valve core of the three-way valve so that the first interface is connected to the second interface, and the exhaust heat is directly discharged; under an extremely cold operating environment, the steering control motor controls the movement of the valve core of the three-way valve so that the first interface is connected to the third interface, and the heat of the engine exhaust is used as a heat source for the preheating system, which can not only achieve the effect of energy saving and environmental protection, but also preheat the relevant components on the engineering equipment; in some preferred embodiments, the third interface is also provided with a supercharger, preferably, the supercharger is a turbocharger, and the setting of the supercharger can boost the hot air recovered from the engine exhaust, so as to facilitate the subsequent process of transporting it to the heat inlet of the preheating system.

[0021] 2. The utility model provides a preheating system, comprising a preheating pipeline and the above-mentioned engine exhaust heat recovery device; the heat inlet of the preheating pipeline is connected to the third interface of the engine exhaust heat recovery device through an electromagnetic connecting valve, and the electromagnetic connecting valve is used to control the connection and disconnection between the third interface and the preheating pipeline. The heat collected from the engine exhaust enters the heat inlet of the preheating pipeline and then enters the preheating main pipe, and is then distributed to each preheating branch pipe through the preheating main pipe. The preheating branch pipe is provided with an air nozzle, and finally discharged by the air nozzle to preliminarily preheat the components to be preheated of the engineering equipment; the utility model also includes a temperature sensor, and the temperature sensor is respectively connected to the The steering control motor and the electromagnetic connecting valve are communicatively connected, and the temperature sensor is arranged around the component to be preheated, and is used to monitor the temperature information of the hot gas ejected from the nozzle, so as to control the opening of the three-way valve of the engine exhaust heat recovery device and control the on-off of the electromagnetic connecting valve; the preheating system provided by the utility model has a simple structure and is easy to install and control. It only needs to arrange the preheating pipeline around the component that needs to be preheated of the engineering equipment, and connect the temperature sensor to the steering control motor and the electromagnetic connecting valve through wires or through wireless communication to achieve control of the preheating system; convenient installation and setting, no need to change the original overall structure of the engineering equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the implementation methods or the description of the prior art. Obviously, the drawings described below are only some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0023] Figure 1 This is a schematic diagram of a front view of an engine exhaust heat recovery device disclosed in the utility model;

[0024] Figure 2 This is a three-dimensional schematic diagram of a preheating system disclosed in the utility model;

[0025] Figure 3 The utility model discloses a three-dimensional schematic diagram of a preheating system installed on a certain engineering equipment.

[0026] Reference numerals:

[0027] 0. Engine exhaust heat recovery device; 1. Three-way valve; 11. First interface; 12. Second interface; 13. Third interface;

[0028] 2. Steering control motor; 3. Intake pipe; 4. Exhaust hood; 5. Supercharger;

[0029] 6. Preheating pipeline; 61. Preheating main pipe; 62. Preheating branch pipe; 63. Air nozzle; 64. Temperature sensor; 65. Smoke sensor; 7. Solenoid connecting valve; 8. Engine after-treatment device.

[0030] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] It should be noted that all directional indications (such as up, down, etc.) in the implementation mode of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0033] In addition, in this utility model, the terms "first," "second," etc. are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one of such features.

[0034] Moreover, the technical solutions between the various embodiments of the present invention can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0035] Example 1

[0036] See also Figure 1 The utility model provides an engine exhaust heat recovery device, comprising a three-way valve 1 and a steering control motor 2 drivingly connected to the three-way valve 1;

[0037] The first port 11 of the three-way valve 1 is used to connect to the rear end of the engine after-treatment device 8, the second port 12 of the three-way valve 1 is used to discharge exhaust gas, and the third port 13 of the three-way valve 1 is used to connect to the preheating pipeline 6 to provide a heat source for the preheating system;

[0038] The steering control motor 2 is used to control the valve core of the three-way valve 1 to operably connect the first interface 11 with the second interface 12, or connect the first interface 11 with the third interface 13;

[0039] The utility model sets a three-way valve 1 and controls the communication channel of the three-way valve 1 through the steering control motor 2. With such a setting, it is possible to choose to directly discharge the heat of the engine exhaust gas or recycle the heat of the engine exhaust gas according to the environment in which the engineering equipment is located. Specifically, under a conventional operating environment, the steering control motor 2 controls the valve core movement of the three-way valve 1 so that the first interface 11 is connected to the second interface 12, and the heat of the exhaust gas is directly discharged; under an extremely cold operating environment, the steering control motor 2 controls the valve core movement of the three-way valve 1 so that the first interface 11 is connected to the third interface 13, and the heat of the engine exhaust gas is used as the heat source of the preheating system, which can not only achieve the effect of energy saving and environmental protection, but also preheat the relevant components on the engineering equipment.

[0040] As a preferred embodiment, the third interface 13 is connected to a supercharger 5 for supercharging the collected exhaust gas for later use; see Figure 1 The supercharger 5 is a pipe with a bell-shaped mouth that gradually contracts, which can preliminarily supercharge the collected exhaust gas. In some preferred embodiments, other supercharging components can be connected to the rear end of the pipe. Preferably, a turbocharger 5 can also be connected to the rear end of the pipe to further pressurize the collected exhaust gas so that the pressurized exhaust gas can be smoothly and well input into the heat inlet of the preheating system.

[0041] As a preferred embodiment, an intake pipe 3 is connected to the first interface 11 for connecting to the rear end of the engine after-processing device 8; specifically, one end of the intake pipe 3 is connected to the rear end of the engine after-processing device 8 via a flange, and the other end is connected to the first interface 11. In some preferred embodiments, an insulation layer may be further wrapped around the intake pipe 3 to prevent heat loss.

[0042] As a preferred embodiment, the second interface 12 is connected to an exhaust hood 4 to discharge the engine exhaust.

[0043] Example 2

[0044] See also Figure 2 The present invention further provides a preheating system, comprising a preheating pipeline 6 and the engine exhaust heat recovery device 0 provided in Example 1; the heat inlet of the preheating pipeline 6 is connected to the third interface 13 of the engine exhaust heat recovery device 0 through an electromagnetic connecting valve 7;

[0045] The preheating pipeline 6 includes a preheating main pipe 61 and a plurality of preheating branch pipes 62 connected to the preheating main pipe 61. The plurality of preheating branch pipes 62 are arranged at intervals on the preheating main pipe 61. The preheating branch pipes 62 are provided with air nozzles 63 for injecting hot air toward the component to be preheated. Specifically, the preheating branch pipes 62 are provided with at least one air nozzle 63. In this embodiment, each preheating branch pipe 62 is provided with at least two air nozzles 63. The preheating branch pipes 62 are connected to the preheating main pipe 61 via a conversion joint.

[0046] The preheating pipeline 6 also includes a temperature sensor 64, which is respectively connected to the steering control motor 2 and the electromagnetic intercommunication valve 7; the temperature sensor 64 is arranged around the component to be preheated and is used to monitor the temperature information of the hot gas ejected by the air nozzle 63 so as to control the opening of the three-way valve 1 of the engine exhaust heat recovery device 0 and control the on-off of the electromagnetic intercommunication valve 7;

[0047] With such a configuration, the heat collected from the engine exhaust enters the heat inlet of the preheating pipe 6 and then enters the preheating main pipe 61, and is then distributed to each preheating branch pipe 62 through the preheating main pipe 61. The preheating branch pipe 62 is provided with an air nozzle 63, and is finally discharged by the air nozzle 63 to preliminarily preheat the components to be preheated of the engineering equipment; the temperature sensor 64 is respectively connected to the steering control motor 2 and the electromagnetic connecting valve 7 for communication; specifically, when the temperature sensor 64 detects that the current temperature is lower than the preset preheating temperature, the steering control motor 2 rotates to increase the opening of the three-way valve 1 and increase the flow rate of the collected exhaust gas; if it is higher than the preset preheating temperature, the steering control motor 2 rotates The three-way valve 1 is moved to reduce the opening of the three-way valve 1 and reduce the flow rate of the collected exhaust gas. The preheating system provided by the present invention has a simple structure and is easy to install and control. It only needs to arrange the preheating pipeline 6 around the parts of the engineering equipment that need to be preheated, and connect the temperature sensor 64 with the steering control motor 2 and the electromagnetic connecting valve 7 through wires or through wireless communication to achieve control of the preheating system. The convenient installation and setting do not require changing the original overall structure of the engineering equipment. There is no need to add additional mounting brackets. It is only necessary to fix the preheating main pipe 61 and / or the preheating branch pipe 62 with pipe clamps. The installation method is simple and the versatility is high. It can be easily applied to different engineering equipment.

[0048] As a preferred embodiment, the preheating pipeline 6 also includes a smoke sensor 65, which is communicatively connected to the steering control motor 2 of the engine exhaust heat recovery device 0; the smoke sensor 65 is arranged around the component to be preheated, and is used to monitor the diffusion information of the hot gas ejected by the nozzle 63 so as to control the opening of the three-way valve 1 of the engine exhaust heat recovery device 0; the combination of the smoke sensor 65 and the temperature sensor 64 can effectively monitor the temperature information and smoke density around the component to be preheated, and facilitate the corresponding adjustment of the opening corresponding to the valve core of the three-way valve 1, so as to achieve accurate preheating of the component to be preheated, thereby improving the utilization rate of the heat generated by the exhaust gas.

[0049] Example 3

[0050] See also Figure 3 The present invention further provides an engineering equipment, including the preheating system provided in Example 2. In this embodiment, an excavator is used as an example for explanation. The engine exhaust heat recovery device 0 is arranged at the rear end of the engine after-treatment device 8 of the excavator's powertrain. A preheating pipeline 6 is installed on the skeleton assembly of the excavator's cover assembly. The preheating main pipe 61 is placed on the side. High-temperature gas is ejected through the air nozzle 63 to preheat the surrounding area of ​​the powertrain engine.

[0051] When the excavator is operating in extremely cold conditions, the engine exhaust heat recovery device 0 recovers the hot air from the exhaust gas and preheats its components through the connected preheating pipe 6. The heat of the engine exhaust gas is fully recovered and utilized, so that the machine has better cold start heating capability. At the same time, this structure does not change the original overall structure of the excavator, does not require additional mounting brackets, and its installation method is simple and highly versatile, and can be installed and applied to excavators of different specifications and models.

[0052] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. All equivalent structural transformations made based on the contents of the present invention specification and drawings, or direct / indirect applications in other related technical fields, within the scope of the present invention are included in the patent protection scope of the present invention.

Claims

1. An engine exhaust heat recovery device, characterized in that: It includes a three-way valve and a steering control motor drivingly connected to the three-way valve; The first interface of the three-way valve is used to connect to the rear end of the engine after-treatment device, the second interface of the three-way valve is used to discharge exhaust gas, and the third interface of the three-way valve is used to connect to the preheating pipeline to provide a heat source for the preheating system; The steering control motor is used to control the valve core of the three-way valve to operably connect the first interface with the second interface, or connect the first interface with the third interface.

2. The engine exhaust heat recovery device according to claim 1, characterized in that: The third interface is connected to a supercharger for supercharging the collected exhaust gas.

3. An engine exhaust heat recovery device according to claim 1 or 2, characterized in that: The first interface is connected to an air intake pipe for connecting to the rear end of the engine after-processing device.

4. An engine exhaust heat recovery device according to claim 1 or 2, characterized in that: The second interface is connected to an exhaust hood to discharge the engine exhaust.

5. A preheating system, characterized in that: It comprises a preheating pipeline and an engine exhaust heat recovery device according to any one of claims 1 to 4; the heat inlet of the preheating pipeline is connected to the third interface of the engine exhaust heat recovery device through an electromagnetic connecting valve; The preheating pipeline includes a preheating main pipe and a plurality of preheating branch pipes connected to the preheating main pipe, wherein the plurality of preheating branch pipes are arranged on the preheating main pipe at intervals, and the preheating branch pipes are provided with air nozzles for spraying hot air toward the component to be preheated; The preheating pipeline also includes a temperature sensor, which is communicatively connected to the steering control motor and the electromagnetic connecting valve respectively.

6. A preheating system according to claim 5, characterized in that: The temperature sensor is arranged around the component to be preheated and is used to monitor the temperature information of the hot air ejected by the air nozzle so as to control the opening of the three-way valve of the engine exhaust heat recovery device.

7. A preheating system according to claim 5 or 6, characterized in that: The preheating pipeline also includes a smoke sensor, which is communicatively connected to the steering control motor of the engine exhaust heat recovery device.

8. A preheating system according to claim 7, characterized in that: The smoke sensor is arranged around the component to be preheated and is used to monitor the diffusion information of the hot gas ejected by the air nozzle so as to control the opening of the three-way valve of the engine exhaust heat recovery device.

9. An engineering equipment, characterized in that: The invention comprises a preheating system as described in any one of claims 5 to 8.

Images