Sealing structure for liquid level sensor of expansion kettle

Abstract

The utility model relates to the technical field of automobile thermal management systems, in particular to a sealing structure for a liquid level sensor of an expansion kettle, which is characterized in that when the sealing structure is used, an X-O-shaped ring is mounted in a mounting hole, then a steel bar penetrates through the mounting hole, and the X-O-shaped ring seals a gap between the mounting hole and the steel bar; then the plastic seat is clamped with the mounting seat through the annular positioning boss and the deep annular sealing groove, and the plastic seat seals the cavity, so that the sealing performance is improved; comprising a steel bar, a mounting base, a plastic base and an X-O-shaped ring, a cavity is formed in the top end of the mounting base, a deep annular sealing groove is formed in the inner side wall of the cavity, two sets of mounting holes are formed in the bottom end of the cavity, the plastic base is matched with the cavity, and an annular positioning boss is arranged on the outer side wall of the plastic base; the installation base and the plastic base are connected with the deep annular sealing groove in a clamped mode through the annular positioning boss, a set of steel bars are arranged in each set of installation holes in a penetrating mode, and the installation holes and the steel bars are sealed through X-O-shaped rings.

Description

Technical Field

[0001] This utility model relates to the technical field of automotive thermal management systems, and in particular to a sealing structure for an expansion tank level sensor. Background Technology

[0002] In electric vehicle thermal management, seals are not well-suited to the insulation and aging resistance of coolants, and leaks can easily threaten high-voltage electrical systems. Structural optimization of seals made of lightweight materials (such as PTFE) is still under exploration, and it is difficult to perfectly balance sealing performance and lightweighting. Intelligent monitoring functions are only in their infancy, and a mature self-monitoring and self-adaptive system has not yet been formed. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a sealing structure for an expansion tank level sensor.

[0004] This utility model discloses a sealing structure for a liquid level sensor in an expansion tank, comprising a steel rod, a mounting base, a plastic seat, and an XO ring. The mounting base has a cavity at its top, a deep annular sealing groove on its inner wall, and two sets of mounting holes at its bottom. The plastic seat is fitted to the cavity, and an annular positioning boss is provided on its outer wall. The mounting base and the plastic seat are engaged with the deep annular sealing groove via the annular positioning boss. A steel rod is inserted into each set of mounting holes, and the mounting holes and steel rods are sealed by the XO ring. In use, the XO ring is installed in the mounting hole, then the steel rod passes through the mounting hole, and the XO ring seals the gap between the mounting hole and the steel rod. Finally, the plastic seat is engaged with the mounting base via the annular positioning boss and the deep annular sealing groove, sealing the cavity and improving the sealing performance.

[0005] Preferably, the mounting base and the plastic base are manufactured by injection molding.

[0006] Compared with the prior art, the beneficial effects of this utility model are as follows: In use, the XO ring is installed in the mounting hole, and then the steel rod passes through the mounting hole. The XO ring seals the gap between the mounting hole and the steel rod. Then, the plastic seat is engaged with the mounting seat through the annular positioning boss and the deep annular sealing groove. The plastic seat seals the cavity and improves the sealing performance. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the isometric structure of this utility model;

[0008] Figure 2 This is an exploded structural diagram of the present invention;

[0009] Figure 3 This is a front view schematic diagram of the XO-ring structure;

[0010] Figure 4This is a top view of the XO-type ring structure.

[0011] The following are labels in the attached diagram: 1. Steel rod; 2. Mounting base; 3. Plastic base; 4. XO ring; 5. Annular sealing groove; 6. Annular positioning boss. Detailed Implementation

[0012] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete.

[0013] Example

[0014] like Figures 1 to 4 As shown, the present invention discloses a sealing structure for an expansion tank level sensor, comprising a steel rod 1, a mounting base 2, a plastic seat 3, and an XO ring 4. The mounting base 2 has a cavity at its top, a deep annular sealing groove on the inner side wall of the cavity, and two sets of mounting holes at its bottom. The plastic seat 3 is adapted to the cavity, and an annular positioning boss is provided on the outer side wall of the plastic seat 3. The mounting base 2 and the plastic seat 3 are engaged with the deep annular sealing groove through the annular positioning boss. A set of steel rods 1 are inserted into each set of mounting holes, and the mounting holes and steel rods 1 are sealed by the XO ring 4.

[0015] In this embodiment, during use, the XO ring 4 is installed in the mounting hole, and then the steel rod 1 passes through the mounting hole. The XO ring 4 seals the gap between the mounting hole and the steel rod 1. Then, the plastic seat 3 is engaged with the mounting seat 2 through the annular positioning boss and the deep annular sealing groove. The plastic seat 3 seals the cavity and improves the sealing performance.

[0016] The main functions achieved by this utility model are as follows: This sealing structure addresses the problems of traditional rubber sealing rings being prone to aging and failure, and having poor adaptability to complex working conditions. It integrates material innovation and structural optimization ideas, and achieves reliable sealing by precisely controlling the mechanical properties and media compatibility of the sealing interface. This avoids risks such as distorted liquid level monitoring, coolant leakage, and electrical short circuits, and realizes the functions of liquid level monitoring and sealing. It is a specific product design presentation in this technical field.

[0017] This utility model discloses a sealing structure for a liquid level sensor in an expansion tank. Step one involves raw material pretreatment.

[0018] PPGF20 (2 / 3): Dry 20% glass fiber reinforced polypropylene granules in an 80℃ drying oven for 4 hours to remove moisture and prevent injection molding bubbles;

[0019] 06Cr19Ni10 stainless steel (1): cut into bars with a diameter of 5mm and a length of 40mm, and machine 0.5mm chamfers at both ends;

[0020] EPDM compound (4): Select EPDM rubber with a Shore hardness of 60-70, add vulcanizing agent (diisopropylbenzene peroxide 1.5%) and accelerator (CZ 0.8%), and mix evenly on a two-roll mill;

[0021] Step 2: Injection molding.

[0022] Mold design: A two-plate mold structure is adopted. The mounting base mold cavity is equipped with a 3mm deep annular sealing groove (2.8mm wide) and a 5.2mm diameter probe mounting hole. The plastic base mold is reserved with an assembly positioning boss.

[0023] Process parameters: Barrel temperature 210 - 230℃, mold temperature 45℃, injection pressure 80 - 100MPa, holding time 15s, cooling time 20s, after molding, remove and cool to room temperature;

[0024] Step 3: Probe assembly.

[0025] Apply silicone sealant (Dow Corning DC730) to the probe surface, press it vertically into the mounting hole with an interference fit of 0.2mm, and cure for 2 hours;

[0026] Step 4: X-O ring forming and installation.

[0027] Vulcanization molding: Place the compounded rubber into the mold and vulcanize it at 170℃ and 12MPa pressure for 10 minutes. After demolding, trim the flash.

[0028] Assembly: Insert the X-O ring (2.65mm × 2.65mm cross-section) into the sealing groove to ensure a complete fit without twisting.

[0029] Step 5: Overall assembly.

[0030] The mounting base and the plastic base are fastened together using a snap-fit ​​structure, with the torque controlled at 1.2 N·m, thus completing the assembly of the sealing structure. The XO ring of the sealing structure of the expansion tank level sensor of this utility model is commercially available. Technicians in this industry only need to follow the accompanying instruction manual for installation and operation, without requiring any creative work from those skilled in the art.

[0031] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An expanded water kettle liquid level sensor sealing structure, comprising a steel rod (1), a mounting seat (2), a plastic seat (3) and an X-O type ring (4), characterized in that, The top of the mounting base (2) is provided with a cavity, the inner side wall of the cavity is provided with a deep annular sealing groove, and the bottom of the cavity is provided with two sets of mounting holes. The plastic seat (3) is adapted to the cavity, and the outer side wall of the plastic seat (3) is provided with an annular positioning boss. The mounting base (2) and the plastic seat (3) are engaged with the deep annular sealing groove through the annular positioning boss. A set of steel rods (1) are respectively inserted in each set of mounting holes, and the mounting holes and steel rods (1) are sealed by XO rings (4).

2. An expanded water jug liquid level sensor seal as defined in claim 1, wherein, The mounting base (2) and the plastic base (3) are processed by injection molding.

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