Rigidity valve sealing structure

Abstract

The utility model discloses a rigidity valve sealing structure which comprises a static core, a valve rod and a valve framework, the valve rod penetrates through the static core, the valve framework is installed at the end of the valve rod, a PTFE framework and an O-shaped ring are further placed between the valve framework and the static core, and the O-shaped ring is relatively fixed to the outer circumferential side of the PTFE framework. The utility model has the advantages of simple structure, corrosion resistance, better wear resistance, higher strength, simple production process and more convenient installation.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic valves, in particular to a rigidity valve sealing structure. Background Art

[0002] The stiffness valve adjusts the hardness of the suspension in real time based on factors such as vehicle speed, road conditions and load to provide optimal suspension performance and driving comfort. It is a vital component in the air suspension system and plays a vital role in improving the vehicle's suspension performance and driving comfort.

[0003] Existing rigid valves, such as patent application CN202322326956.8, disclose an elastic guide ring, a movable iron core guide structure, and a solenoid valve. The existing lip seal assembly consists of a metal lip seal frame that is processed, coated with adhesive, and then vulcanized to bond the rubber portion to the metal lip seal frame. In rigid valve assemblies, the rubber of the lip seal wraps around the valve frame to achieve dynamic sealing. This makes the compression of the rubber difficult to control, resulting in poor sealing performance at low compression levels. High compression creates static friction that causes the valve assembly to actuate, impacting product performance. This also shortens the service life of the rubber when it is under high compression for extended periods. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a rigid valve sealing structure, which has a simple structure, better corrosion resistance and wear resistance, higher strength, simple production process and more convenient installation.

[0005] In order to solve the above problems, the present invention adopts the following technical solutions:

[0006] A rigid valve sealing structure includes a static core, a valve stem and a valve frame. The valve stem passes through the static core. The valve frame is installed at the end of the valve stem. A PTFE frame and an O-ring are placed between the valve frame and the static core. The O-ring is relatively fixed on the outer circumference of the PTFE frame.

[0007] A further technical solution is that grooves are distributed on the outer circumference of the PTFE skeleton, and the O-ring is sleeved in the grooves to facilitate installation and disassembly.

[0008] A further technical solution is that the outer circumference of the O-ring extends to the outside of the groove on the PTFE skeleton, and the extended part can be squeezed and slightly deformed, which not only increases the friction with the inner circumference of the static core to prevent the PTFE skeleton from moving left and right, but also cooperates with the PTFE skeleton to prevent gas from passing through, achieving a good sealing effect.

[0009] A further technical solution is that a flange extending inward is distributed on the upper ring of the static core and located at the right end of the PTFE skeleton, which can further prevent the PTFE skeleton from moving left and right and improve the sealing stability of the PTFE skeleton and the O-ring.

[0010] A further technical solution is that the inner side of the PTFE skeleton is inclined along the left and right sides of the ring. When the valve skeleton moves left and right and contacts the inner side of the PTFE skeleton, the small contact area can reduce the resistance to the movement of the valve skeleton.

[0011] The beneficial effects of the utility model are:

[0012] The utility model provides a rigid valve sealing structure. The PTFE skeleton and O-ring assembly method replaces the existing process of rubber vulcanization on the metal lip seal skeleton, simplifies the production process, and is faster to assemble. After assembly with the static core, the O-ring compresses and fits the PTFE skeleton to achieve a sealing effect. During the reciprocating motion of the metal valve skeleton, the PTFE skeleton has better corrosion resistance and wear resistance than rubber, and has higher strength. In addition, PTFE has a certain self-lubricating effect, so the product is more stable and more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 It is a schematic diagram of the original stiffness valve sealing structure;

[0015] Figure 2 This is a structural diagram of a rigidity valve sealing structure of the utility model;

[0016] Figure 3 This is a schematic diagram of a rigidity valve sealing structure installed on a rigidity valve according to the present invention.

[0017] Figure 1-3 Middle: 1-static core, 2-valve stem, 3-valve frame, 4-O-ring, 5-PTFE frame, 6-flange, 7-bevel, 8-slot. DETAILED DESCRIPTION

[0018] The preferred embodiments of the present invention are described in detail below so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention.

[0019] See Figures 2 to 3 As shown, a rigid valve sealing structure includes a static core 1, a valve stem 2 and a valve skeleton 3. The valve stem 2 passes through the static core 1. The valve skeleton 3 is installed at the end of the valve stem 2. A PTFE skeleton 5 and an O-ring 4 are placed between the valve skeleton 3 and the static core 1. The O-ring 4 is relatively fixed on the outer circumferential side of the PTFE skeleton 5.

[0020] The outer circumference of the PTFE skeleton 5 is provided with a slot 8, and the O-ring 4 is sleeved within the slot 8 for easy installation and removal. The outer circumference of the O-ring 4 extends to the outside of the slot 8 on the PTFE skeleton 5. The extended portion can be squeezed and slightly deformed, which not only increases the friction with the inner circumference of the static core 1 to prevent the PTFE skeleton 5 from moving left and right, but also cooperates with the PTFE skeleton 5 to completely prevent gas from passing through, achieving an excellent sealing effect. The static core 1 is also provided with a flange 6 extending inward along the annular edge and located on the right side of the PTFE skeleton 5. This further prevents the PTFE skeleton 5 from moving left and right, and improves the sealing stability of the PTFE skeleton 5 and the O-ring 4. The inner end of the PTFE skeleton 5 has inclined surfaces 7 along the left and right sides of the ring. When the valve skeleton 3 moves left and right and contacts the inner end of the PTFE skeleton 5, the small contact area can reduce the resistance to the movement of the valve skeleton 3.

[0021] In this embodiment, the PTFE (polytetrafluoroethylene) skeleton plus O-ring assembly method replaces the existing process of rubber vulcanization on the metal lip seal skeleton, which simplifies the production process and makes assembly faster. After assembly with the static core, the O-ring compresses and fits the PTFE skeleton to achieve a sealing effect. During the reciprocating motion of the metal valve skeleton, the PTFE skeleton has better corrosion resistance and wear resistance than rubber, and has higher strength. PTFE also has a certain self-lubricating effect, so the product is more stable and more reliable.

[0022] The above is only a specific implementation method of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or replacements that are not conceived through creative work should be included in the protection scope of the present invention.

Claims

1. A rigid valve sealing structure, comprising a static core, a valve stem and a valve frame, wherein the valve stem passes through the static core and the valve frame is mounted on the end of the valve stem, characterized in that: A PTFE frame and an O-ring are placed between the valve frame and the static core, and the O-ring is relatively fixed on the outer circumference of the PTFE frame.

2. A rigid valve sealing structure according to claim 1, characterized in that: The outer circumference of the PTFE skeleton is provided with clamping grooves, and the O-ring is sleeved in the clamping grooves.

3. A rigid valve sealing structure according to claim 2, characterized in that: The outer circumference of the O-ring extends to the outside of the clamping groove on the PTFE skeleton.

4. The rigidity valve sealing structure according to claim 1, characterized in that: A flange extending inward is distributed in a ring shape on the upper edge of the static core and is located at the right end of the PTFE skeleton.

5. The rigidity valve sealing structure according to claim 1, characterized in that: The inner side end of the PTFE skeleton is inclined along the left and right sides of the ring.

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