Combined anti-frost-crack urea pump sensor
By using a modular design and an aluminum alloy housing, the problem of traditional urea pump sensors being prone to freezing and cracking in low-temperature environments has been solved, thereby improving the sensor's freeze resistance and reliability and reducing maintenance costs.
Patent Information
- Application Number
- CN202520761067.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-22
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-04-22
AI Technical Summary
Traditional urea pump pressure sensors are prone to freezing and cracking in low-temperature environments, have poor sealing performance, high maintenance costs, and are difficult to adapt to different application environments.
It adopts a modular design, with the outer shell and inner shell being detachably connected. The inner shell is fitted with a rubber stopper and uses an aluminum alloy shell. The rubber stopper prevents urea from freezing and damaging the sensor.
It improves the sensor's freeze resistance and reliability, reduces maintenance costs, and adapts to different application environments.
Smart Images
Figure CN223854338U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of sensor, concretely relates to a combined anti -frozen crack urea pump sensor. BACKGROUND
[0002] The function of urea pump pressure sensor is to monitor the pressure change of urea pump, ensure the normal operation of injection system and adjust injection quantity. As the core component of diesel vehicle SCR system, urea pump sensor needs to be exposed to urea solution and low temperature environment for a long time, and its sealing property and frost resistance directly affect the reliability of the system.
[0003] Traditional urea pump pressure sensor adopts integrated design, and has the following defects: high risk of frost crack: urea solution crystallizes and expands at low temperature, and the deformation compensation capacity of traditional sealing structure is poor, which easily leads to shell cracking or sensor failure; high maintenance cost: and the existing sensor is usually designed in an integrated structure, which is difficult to adapt to different application environments. UTILITY MODEL CONTENT
[0004] The utility model aims at providing a combined anti -frozen crack urea pump sensor, which adopts modular combined structure design, can select different shell bodies for installation and use according to application environment, and avoids sensor damage caused by easy icing of urea in low temperature environment.
[0005] In order to realize the above purpose, the utility model provides the following technical scheme: a combined anti -frozen crack urea pump sensor, which comprises an outer shell and an inner shell, the outer shell and the inner shell are detachably connected, a first mounting hole is formed in the outer shell, a second mounting hole is formed in the inner shell, a pressure sensor body is fixedly connected on the second mounting hole, the detection end of the pressure sensor body is located in the second mounting hole, a rubber plug is arranged between the pressure sensor body and the inner shell in the second mounting hole, and hydraulic detection holes are arranged on the inner shell and the rubber plug.
[0006] Further, the two sides of the outer shell are fixedly connected with bushings, the outer wall of the outer shell is provided with a clamping groove, the outer wall of the inner shell is fixedly connected with a buckle, and the inner shell is detachably connected with the outer shell through the buckle.
[0007] Further, a wiring hole is arranged on the outer shell, and a dust plug is arranged at the wiring hole.
[0008] Further, the buckle and the clamping groove are both specifically provided with a plurality of buckles and clamping grooves, and the buckle and the clamping groove are correspondingly arranged.
[0009] Further, the outer shell of the pressure sensor body is made of aluminum alloy.
[0010] Further, the rubber plug is in a stepped column shape, the small-diameter end of the rubber plug extends into the detection end of the pressure sensor body, and the large-diameter end of the rubber plug is located between the pressure sensor body and the inner shell.
[0011] The shell body and the inner shell adopt a modular combined structure design, different shell bodies can be selected for installation and use according to application environments.
[0012] The rubber plug is arranged between the pressure sensor body and the inner shell, which can effectively prevent the sensor from being damaged due to icing of urea in a low-temperature environment.
[0013] The shell of the pressure sensor body is made of an aluminum alloy shell, which can effectively improve the burst pressure of the pressure sensor and is more excellent than the anti-burst performance of a nylon plastic shell. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 It is a first perspective view of the utility model.
[0015] Figure 2 It is a second perspective view of the utility model.
[0016] Figure 3 It is a sectional view of the inner shell of the utility model.
[0017] Figure 4 It is an explosion schematic view of the shell body of the utility model.
[0018] In the figure: 1, shell body; 101, first mounting hole; 102, clamping groove; 103, bushing; 104, wiring hole; 2, inner shell; 201, second mounting hole; 202, buckle; 3, pressure sensor body; 4, rubber plug; 5, dust plug. DETAILED DESCRIPTION
[0019] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the utility model is further described in detail below by combining with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model, and are not used to limit the utility model.
[0020] REFERENCE Figures 1-4The utility model provides a kind of combined anti-freezing urea pump sensor shown, including outer shell 1 and inner shell 2, outer shell 1 and inner shell 2 detachably connect, according to the application environment selection different outer shell 1 is installed on inner shell 2 and is used, first mounting hole 101 is opened on outer shell 1, second mounting hole 201 is opened on inner shell 2, pressure sensor body 3 is fixedly connected on second mounting hole 201, the detection end of pressure sensor body 3 is located in second mounting hole 201, rubber plug 4 is arranged between pressure sensor body 3 and inner shell 2 in second mounting hole 201, and hydraulic detection hole is formed in inner shell 2 and rubber plug 4.
[0021] Bushing 103 is fixedly connected on the both sides of outer shell 1, and the bushing 103 is used for cooperating with fastener to fixedly connect the outer shell, the clamping groove 102 formed on the outer wall of outer shell 1 is used for matching the buckle 202 on the inner shell 2 to realize the assembly and fixation of the inner shell 2 on the outer shell 1, and the buckle 202 is fixedly connected on the outer wall of the inner shell 2. The wire hole 104 is formed on the outer shell 1 for limiting the wire harness of the pressure sensor body, and the dust plug 5 is arranged at the wire hole 104, so that the dust can be reduced into the outer shell 1. The buckle 202 and the clamping groove 102 are both specifically provided with a plurality of buckles 202 and clamping grooves 102, and the buckle 202 is correspondingly arranged with the clamping groove 102, so that the fixing strength of the inner shell 2 and the outer shell 1 can be further improved.
[0022] The outer shell of pressure sensor body 3 is made of aluminum alloy material, which can effectively improve the burst pressure of the pressure sensor, and the anti-burst performance is better than that of nylon plastic shell.
[0023] The rubber plug 4 is in the shape of a stepped column, the small-diameter end of the rubber plug 4 extends into the detection end of the pressure sensor body 3, and the large-diameter end of the rubber plug 4 is located between the pressure sensor body 3 and the inner shell 2. In the case of low ambient temperature, the rubber plug 4 can prevent the sensor from being damaged due to freezing caused by urea solution thawing.
[0024] The above embodiments are used to further illustrate the utility model, but the utility model is not limited to these specific embodiments. Any modification, equivalent replacement and improvement made within the spirit and principles of the utility model should be understood as within the scope of protection of the utility model.
Claims
1. A combined freeze crack urea pump sensor, characterized by: The utility model relates to a pressure sensor, including outer casing (1) and inner casing (2), outer casing (1) and inner casing (2) can be detachably connected, first mounting hole (101) is opened on outer casing (1), second mounting hole (201) is opened on inner casing (2), and pressure sensor body (3) is fixedly connected on second mounting hole (201), and the detection end of pressure sensor body (3) is located in second mounting hole (201), rubber plug (4) is arranged between pressure sensor body (3) and inner casing (2) in second mounting hole (201), and hydraulic detection hole is arranged on inner casing (2) and rubber plug (4).
2. A combined freeze crack urea pump sensor according to claim 1, characterized in that: The utility model relates to a pressure sensor, including outer casing (1) and inner casing (2), outer casing (1) and inner casing (2) can be detachably connected, first mounting hole (101) is opened on outer casing (1), second mounting hole (201) is opened on inner casing (2), and pressure sensor body (3) is fixedly connected on second mounting hole (201), and the detection end of pressure sensor body (3) is located in second mounting hole (201), rubber plug (4) is arranged between pressure sensor body (3) and inner casing (2) in second mounting hole (201), and hydraulic detection hole is arranged on inner casing (2) and rubber plug (4).
3. A combined freeze crack urea pump sensor according to claim 2, characterized in that: The utility model relates to a pressure sensor, including outer casing (1) and inner casing (2), outer casing (1) and inner casing (2) can be detachably connected, first mounting hole (101) is opened on outer casing (1), second mounting hole (201) is opened on inner casing (2), and pressure sensor body (3) is fixedly connected on second mounting hole (201), and the detection end of pressure sensor body (3) is located in second mounting hole (201), rubber plug (4) is arranged between pressure sensor body (3) and inner casing (2) in second mounting hole (201), and hydraulic detection hole is arranged on inner casing (2) and rubber plug (4).
4. A combined freeze crack urea pump sensor according to claim 2, characterized in that: The utility model relates to a pressure sensor, including outer casing (1) and inner casing (2), outer casing (1) and inner casing (2) can be detachably connected, first mounting hole (101) is opened on outer casing (1), second mounting hole (201) is opened on inner casing (2), and pressure sensor body (3) is fixedly connected on second mounting hole (201), and the detection end of pressure sensor body (3) is located in second mounting hole (201), rubber plug (4) is arranged between pressure sensor body (3) and inner casing (2) in second mounting hole (201), and hydraulic detection hole is arranged on inner casing (2) and rubber plug (4).
5. A combined freeze crack urea pump sensor according to claim 1, characterized in that: The utility model relates to a pressure sensor, including outer casing (1) and inner casing (2), outer casing (1) and inner casing (2) can be detachably connected, first mounting hole (101) is opened on outer casing (1), second mounting hole (201) is opened on inner casing (2), and pressure sensor body (3) is fixedly connected on second mounting hole (201), and the detection end of pressure sensor body (3) is located in second mounting hole (201), rubber plug (4) is arranged between pressure sensor body (3) and inner casing (2) in second mounting hole (201), and hydraulic detection hole is arranged on inner casing (2) and rubber plug (4).
6. A combined freeze crack urea pump sensor according to claim 1, characterized in that: The utility model relates to a pressure sensor, including outer casing (1) and inner casing (2), outer casing (1) and inner casing (2) can be detachably connected, first mounting hole (101) is opened on outer casing (1), second mounting hole (201) is opened on inner casing (2), and pressure sensor body (3) is fixedly connected on second mounting hole (201), and the detection end of pressure sensor body (3) is located in second mounting hole (201), rubber plug (4) is arranged between pressure sensor body (3) and inner casing (2) in second mounting hole (201), and hydraulic detection hole is arranged on inner casing (2) and rubber plug (4).