Direction adjusting heating device for crankcase emission test
By designing a crankcase emission testing device with Teflon hoses, heating tubes, temperature sensors, and adjustment components, the problem of difficult adjustment and heating of exhaust pipes was solved, and flexible connection between the heating tubes and the testing equipment and efficient testing were achieved.
Patent Information
- Application Number
- CN202520270920.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-20
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2035-02-20
AI Technical Summary
During crankcase emission testing, the exhaust pipes used to connect the crankcase and the testing equipment are difficult to adjust due to their complex structure, rigid materials, and limited testing space. They also cannot be heated, leading to connection difficulties and increasing the difficulty and time cost of test preparation.
A directional heating device was designed, comprising a Teflon hose, a heating element, a temperature sensor, an insulation layer, an adjustment component, and a support and limiting component. The adjustment component adjusts the connection direction between the heating element and the testing equipment, while the support and limiting component restricts the movement trajectory, ensuring flexible deployment and precise connection of the heating element.
It improves the accuracy of the connection between the heating element and the testing equipment, reduces the consumption of manpower and material resources, lowers the difficulty and time cost of test preparation, and improves testing efficiency.
Smart Images
Figure CN223623846U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of crankcase emission testing technology, and relates to a directional adjustment heating device for crankcase emission testing. Background Technology
[0002] The crankcase is indeed a crucial component of a car engine. It not only supports the crankshaft, the core power transmission component, but also relates to the engine's lubrication, sealing, cooling, and overall structural stability.
[0003] According to the China VI emission regulations for heavy-duty vehicles, pollutants from open crankcases should be introduced into the exhaust for measurement and are not allowed to be directly discharged into the atmosphere. The inner wall of the crankcase connecting pipe should be smooth, conductive, and not react with crankcase pollutants. The crankcase exhaust pipe should be heated, thin-walled, or insulated.
[0004] However, when conducting emissions tests on crankcases, the exhaust pipes used to connect the crankcase and the test equipment are often difficult to adjust due to their complex structure, rigid materials, and limited test space. At the same time, the pipes also need to prevent pollutants from condensing and adsorbing on the pipes or undergoing chemical changes, which makes it difficult to connect the pipes and the test equipment conveniently, thus increasing the difficulty and time cost of test preparation. Utility Model Content
[0005] The technical problem this utility model aims to solve is that when conducting emission tests on crankcases, the exhaust pipes used to connect the crankcase and the test equipment are often difficult to adjust and cannot be heated due to their complex structure, rigid materials, and limited test space. This makes it difficult to connect the pipes and the test equipment conveniently and also makes it impossible to guarantee measurement accuracy, thereby increasing the difficulty and time cost of test preparation.
[0006] The present invention discloses a crankcase exhaust port, comprising a crankcase exhaust port, one end of which is fitted with a Teflon hose, one end of which is connected to a sleeve, and one end of which is fitted with a heating tube. A heating wire is installed in the middle of the heating tube, and a first temperature sensor is installed on one side of the heating tube and connected to one end of the heating wire. A second temperature sensor is installed on the inner wall of the heating tube, and a thermal insulation layer is installed on the outer side of the heating tube. Sensing wires are connected to the middle of both the first and second temperature sensors, and one end of the sensing wires is connected to a controller. An adjustment component is provided at the bottom of the thermal insulation layer, and support and limiting components are provided on both sides of the bottom of the thermal insulation layer.
[0007] The adjustment assembly includes connecting columns, which are fixed to both sides of the bottom of the thermal insulation layer. Slide plates are fixed to the bottom of the two connecting columns. Both ends of the slide plates are threaded with lead screws. Hollow sleeves are rotatably connected to both ends of the two lead screws. Inclined rods are fixed to both sides of the bottom of the hollow sleeves.
[0008] The adjustment assembly also includes a base plate and a synchronous pulley set. The base plate is fixed to the bottom of the inclined rod. A support member is fixed to one side of the base plate. A servo motor is installed and connected in the middle of the support member. Support legs are fixed to the four corners of the bottom of the base plate. The output end of the servo motor is connected to one end of a set of lead screws. The synchronous pulley set is installed and connected to one end of two sets of lead screws.
[0009] The support and limiting component includes guide posts, which are fixed to both sides of the bottom of the thermal insulation layer. A U-shaped plate is fixed to the bottom of each guide post, and a pulley is installed and connected in the middle of the U-shaped plate.
[0010] The support and limiting component also includes a limiting groove and a limiting guide rail. The limiting groove is opened in the middle of the pulley, and the limiting guide rail is fixed to both sides of the top of the base plate. The limiting groove and the limiting guide rail fit together.
[0011] Each hollow sleeve has a circular groove in the middle, and multiple sets of ball bearings are rotatably connected in the middle of the circular groove.
[0012] Compared with the prior art, the beneficial effects of this utility model are: by adjusting the setting of the components, the direction of the connection end between the heating tube and the test equipment can be easily adjusted, thereby improving the flexibility of the heating tube deployment and making it easier to adapt to the layout of the engine and the test equipment. This reduces the situation where the heating tube and the test equipment are easily affected by the test environment, space and layout, making it difficult to connect them accurately, which would require a lot of manpower and resources, affect the normal conduct of the test work and reduce the test efficiency.
[0013] By setting up the support limiting component, the movement trajectory of the thermal insulation layer and the heating tube can be restricted, thereby cooperating with the adjustment component to complete the work of directional adjustment. At the same time, it can also assist the lead screw in supporting the thermal insulation layer, reducing the load on the lead screw and preventing the lead screw from being easily worn or deformed due to long-term heavy load. Attached Figure Description
[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0015] Figure 1This is a schematic diagram of the overall structure of this utility model.
[0016] Figure 2 This is a cross-sectional structural diagram of the thermal insulation layer of this utility model.
[0017] Figure 3 This is a cross-sectional structural diagram of the heating tube of this utility model.
[0018] Figure 4 This is a schematic diagram of the structure of the adjustment component of this utility model.
[0019] Figure 5 This is a schematic diagram of the internal structure of the hollow sleeve of this utility model.
[0020] Figure 6 This is a structural schematic diagram of the support and limiting component of this utility model.
[0021] In the diagram: 1. Crankcase exhaust port; 11. Teflon hose; 12. Sleeve; 13. Heating tube; 14. Heating wire; 15. First temperature sensor; 16. Second temperature sensor; 17. Thermal insulation layer; 18. Sensor wire; 2. Connecting post; 21. Slide plate; 22. Lead screw; 23. Hollow sleeve; 24. Diagonal bar; 3. Base plate; 31. Support component; 32. Servo motor; 33. Support leg; 34. Synchronous belt pulley set; 4. Guide post; 41. U-shaped plate; 42. Pulley; 5. Limiting groove; 51. Limiting guide rail; 6. Circular groove; 61. Ball bearing. Detailed Implementation
[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.
[0023] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.
[0024] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.
[0025] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0026] Example 1
[0027] like Figures 1-6As shown, a crankcase exhaust test directional adjustment heating device includes a crankcase exhaust port 1. A Teflon hose 11 is fitted to one end of the crankcase exhaust port 1. A sleeve 12 is connected to one end of the Teflon hose 11. A heating tube 13 is installed and connected to one end of the sleeve 12. A heating wire 14 is installed and connected to the middle of the heating tube 13 for heating. A first temperature sensor 15 is installed and connected to one side of the heating tube 13, and the first temperature sensor 15 is connected to one end of the heating wire 14. The heating tube 13 contains... A second temperature sensor 16 is installed on the wall to set the heating parameters of the heating wire 14. A thermal insulation layer 17 is installed on the outside of the heating tube 13. A sensor wire 18 is connected to the middle of both the first temperature sensor 15 and the second temperature sensor 16, and one end of the sensor wire 18 is connected to a controller. An adjustment component is provided at the bottom of the thermal insulation layer 17 to adjust the direction of the heating tube 13. Support and limiting components are provided on both sides of the bottom of the thermal insulation layer 17 to limit the movement trajectory of the thermal insulation layer 17.
[0028] The adjustment assembly includes connecting posts 2, which are fixed to both sides of the bottom of the thermal insulation layer 17. Slide plates 21 are fixed to the bottom of the two connecting posts 2. Both ends of the slide plates 21 are threaded with lead screws 22. Hollow sleeves 23 are rotatably connected to both ends of the two lead screws 22. Diagonal rods 24 are fixed to both sides of the bottom of the hollow sleeves 23.
[0029] The adjustment assembly also includes a base plate 3 and a synchronous pulley set 34. The base plate 3 is fixed to the bottom of the inclined rod 24. A support member 31 is fixed to one side of the base plate 3. A servo motor 32 is installed and connected in the middle of the support member 31, which can provide power to the adjustment assembly. Support legs 33 are fixed to the four corners of the bottom of the base plate 3, which can support the entire device and keep it away from the ground. The output end of the servo motor 32 is connected to one end of a set of lead screws 22. The synchronous pulley set 34 is installed and connected to one end of the two sets of lead screws 22.
[0030] During operation, both the sleeve 12 and the heating tube 13 are equipped with insulation layers. The heating tube 13 is made of stainless steel with a smooth inner wall, and one end of the sensor wire 18 is connected to a controller. When crankcase emissions need to be tested, the Teflon hose 11 is first connected to the crankcase, and then the heating tube 13 is connected to the testing equipment. The gas emitted from the crankcase will enter the testing equipment through the Teflon hose 11 and the heating tube 13, allowing for detection. During testing, the heating wire 14 can be used to heat the heating tube 13 via the controller, and the parameters of the first temperature sensor 15 and the second temperature sensor 16 can be adjusted. When the heating temperature of the heating wire 14 reaches the set stable value, the heating operation can be stopped, thereby reducing the possibility of condensation caused by the temperature difference between the emitted gas and the heating tube 13, which could affect the accuracy of the test. The Teflon hose 11 also allows for flexible adjustment of the connection angle according to the actual conditions of each engine being tested.
[0031] When it is necessary to adjust the direction of the connection between the heating tube 13 and the test equipment, the servo motor 32 can be driven to rotate a set of lead screws 22. At this time, the torque of the servo motor 32 can be transmitted by the synchronous pulley group 34, which can drive another set of lead screws 22 to rotate synchronously. When the two sets of lead screws 22 rotate, they will rotate with the middle of the hollow sleeve 23 and drive the slide plate 21 and the connecting column 2 to move synchronously. At this time, the slide plate 21 can change its movement trajectory due to the setting of the support and limiting component, so that it drives the heat insulation layer 17 and the heating tube 13 to move in a straight line, thereby changing the position and direction of the connection of the heating tube 13 port. This step can make it easy to adjust the direction of the connection between the heating tube 13 and the test equipment by adjusting the component setting, thereby improving the flexibility of the deployment of the heating tube 13, making it easier to adapt to the layout of the engine and the test equipment, and reducing the situation where the heating tube 13 and the test equipment are easily affected by the test environment, space and layout, making it difficult to connect them accurately, resulting in the need to consume more manpower and material resources, affecting the normal operation of the test work and reducing the test efficiency.
[0032] Example 2
[0033] like Figure 1 , Figure 3 and Figure 6 As shown, the support and limiting component includes guide posts 4, which are fixed to both sides of the bottom of the thermal insulation layer 17. A U-shaped plate 41 is fixed to the bottom of each guide post 4, and a pulley 42 is installed and connected in the middle of the U-shaped plate 41 to assist in supporting the thermal insulation layer 17.
[0034] The support and limiting assembly also includes a limiting groove 5 and a limiting guide rail 51. The limiting groove 5 is opened in the middle of the pulley 42, and the limiting guide rail 51 is fixed to the top two sides of the base plate 3. The limiting groove 5 and the limiting guide rail 51 fit together to limit the movement trajectory of the pulley 42.
[0035] During operation, when the thermal insulation layer 17 moves, it drives the guide post 4, U-shaped plate 41, and pulley 42 to move synchronously. The bottom of the pulley 42 contacts the surface of the base plate 3, so the pulley 42 will rub against the base plate 3 when it moves. Under the action of friction, the pulley 42 will be pushed to roll. The rolling of the pulley 42 will drive the limiting groove 5 to rotate along the middle of the limiting guide rail 51, thereby making the pulley 42 rotate along the middle of the limiting guide rail 51, thus limiting the movement trajectory of the thermal insulation layer 17 and making it move in a straight line along the limiting guide rail 51. This step, through the setting of the supporting limiting component, can limit the movement trajectory of the thermal insulation layer 17 and the heating tube 13, thereby cooperating with the adjustment component to complete the work of directional adjustment. At the same time, it can also assist the lead screw 22 in supporting the thermal insulation layer 17, reducing the load on the lead screw 22 and preventing the lead screw 22 from being easily worn or deformed due to long-term heavy load.
[0036] Example 3
[0037] like Figure 5 As shown, each hollow sleeve 23 has a circular groove 6 in the middle, and multiple sets of balls 61 are rotatably connected in the middle of the circular groove 6.
[0038] During operation, when the lead screw 22 rotates in the middle of the hollow sleeve 23, it will come into contact with and rub against the ball 61. Under the action of friction, the ball 61 can rotate in the middle of the circular groove 6. This step, through the cooperation of the circular groove 6 and the ball 61, can reduce the friction between the lead screw 22 and the inner wall of the hollow sleeve 23, thereby improving the smoothness of the lead screw 22 rotation and reducing the torque required by the servo motor 32.
[0039] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the present utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present utility model, thereby enabling those skilled in the art to better understand and utilize it. The present utility model is limited only by the claims and their full scope and equivalents.
Claims
1. A directional adjustment heating device for crankcase discharge testing, characterized in that: The device includes a crankcase exhaust port (1), one end of which is fitted with a Teflon hose (11), one end of which is connected to a sleeve (12), one end of which is connected to a heating tube (13), one middle of which is connected to a heating wire (14), one side of which is connected to a first temperature sensor (15), which is connected to one end of the heating wire (14), one inner wall of which is connected to a second temperature sensor (16), one outer side of which is connected to a thermal insulation layer (17), one middle of which is connected to a sensor wire (18), one end of which is connected to a controller, one bottom of which is provided with an adjustment component, and one side of which is provided with a support limiting component.
2. The crankcase emission test directional adjustment heating device according to claim 1, characterized in that: The adjustment assembly includes connecting columns (2), which are fixed to both sides of the bottom of the thermal insulation layer (17). Slide plates (21) are fixed to the bottom of the two connecting columns (2). Screws (22) are threaded to both ends of the slide plates (21). Hollow sleeves (23) are rotatably connected to both ends of the two screws (22). Inclined rods (24) are fixed to both sides of the bottom of the hollow sleeves (23).
3. The crankcase emission test directional adjustment heating device according to claim 2, characterized in that: The adjustment assembly also includes a base plate (3) and a synchronous pulley set (34). The base plate (3) is fixed to the bottom of the inclined rod (24). A support member (31) is fixed to one side of the base plate (3). A servo motor (32) is installed and connected in the middle of the support member (31). Support legs (33) are fixed to the four corners of the bottom of the base plate (3). The output end of the servo motor (32) is connected to one end of a set of lead screws (22). The synchronous pulley set (34) is installed and connected to one end of the two sets of lead screws (22).
4. The crankcase emission test directional adjustment heating device according to claim 1, characterized in that: The support limiting component includes guide posts (4), which are fixed to both sides of the bottom of the thermal insulation layer (17). Each guide post (4) has a U-shaped plate (41) fixed to its bottom, and a pulley (42) is installed and connected in the middle of the U-shaped plate (41).
5. The crankcase discharge test directional adjustment heating device according to claim 4, characterized in that: The support limiting component also includes a limiting groove (5) and a limiting guide rail (51). The limiting groove (5) is opened in the middle of the pulley (42), and the limiting guide rail (51) is fixed to the top two sides of the base plate (3). The limiting groove (5) and the limiting guide rail (51) fit together.
6. The crankcase emission test directional adjustment heating device according to claim 2, characterized in that: The hollow sleeve (23) has a circular groove (6) in the middle, and multiple sets of balls (61) are rotatably connected in the middle of the circular groove (6).