Self-adaptive structure of valve sealing surface

Abstract

The utility model discloses a self-adaptive structure of a valve sealing surface, which comprises a motor output shaft, a plane thrust ball bearing, a spring, a rotating shaft, a base plate, a valve moving plate, a valve fixed plate and a valve fixing seat, and an arc-shaped structure is arranged at the center of the rotating shaft; an output shaft of the motor is matched and connected with the rotating shaft; a plane thrust ball bearing, a spring and a rotating shaft are sequentially mounted on the motor output shaft from bottom to top; the rotating shaft is connected with the base plate and the valve moving plate in a matched mode. And the valve fixed plate is attached and fixed to the valve moving plate attaching surface through the valve fixing seat. The utility model discloses can carry out the self-adaptation to the two fitting plane of valve stator plate and valve rotor plate, guarantee two fitting plane complete fit, prevent liquid leakage, also have pressure resistance simultaneously, the pressure can reach 0.8 Mpa.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of multichannel rotary valve, specifically relates to a valve sealing surface self -adaptation structure. BACKGROUND

[0002] In biological, chemical analysis instrument, often use a kind of switch different liquid multichannel rotary switch valve, however in these chemical analysis instruments, there is higher requirement to the sealing property, high temperature and high pressure resistance of valve. To make multichannel rotary valve have good sealing property and pressure resistance, the two adhering surfaces of valve need to be well adhered, but in the valve rotation process, due to the limitation of manufacturing process, the two adhering surfaces of valve cannot reach ideal plane, cannot be completely adhered, to cause valve face to leak or valve not pressure-resistant. SUMMARY

[0003] The utility model discloses in order to solve the deficiency in the prior art, provide a valve sealing surface self -adaptation structure, including motor output shaft, plane thrust ball bearing, spring, rotating shaft, backing plate, valve moving piece, valve fixed piece, valve fixed seat composition, be provided with one arc structure on the rotating shaft;The motor output shaft is connected with rotating shaft in pairs;The motor output shaft is installed with plane thrust ball bearing, spring, rotating shaft from below to top in proper order;The rotating shaft is connected with backing plate, valve moving piece cooperation;The valve fixed piece is again fixed with valve moving piece adhering surface by valve fixed seat and adhering.

[0004] Further, the spring is a butterfly spring or a compression spring.

[0005] Further, the arc structure on the rotating shaft is an upwardly convex arc structure, which is formed by an adapted steel ball cooperating with the arc-shaped groove on the rotating shaft, or the top end of the rotating shaft is an upwardly convex arc structure.

[0006] The beneficial effects of the present application are as follows:

[0007] The utility model can carry out self -adaptation to the two adhering planes of valve fixed piece and valve moving piece, guarantee that two adhering surfaces are completely adhered, prevent liquid leakage, and also have pressure resistance, and pressure can reach 0.8Mpa. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 Structure diagram of valve sealing surface of the utility model Figure 1 ;

[0009] Figure 2 Structure diagram of valve sealing surface of the utility model Figure 2 ;

[0010] Figure 3This is a schematic diagram of the valve sealing surface of this utility model. Figure 3 ;

[0011] In the diagram, 1—motor, 2—flat thrust ball bearing, 3—disc spring, 4—motor output shaft, 5—rotating shaft, 6—steel ball, 7—valve support hole, 8—valve stationary plate, 9—valve moving plate fixing seat, 10—arc-shaped groove, 11—valve moving plate, 12—steel ball pad, 13—compression spring, 14—integrated rotating shaft, 15—arc-shaped protrusion structure Detailed Implementation

[0012] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. However, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without any creative effort are within the scope of protection of the present invention.

[0013] Example 1

[0014] Reference Figure 1 This is the first embodiment of the present invention, which provides a valve sealing surface adaptive structure, comprising a motor output shaft 4, a planar thrust ball bearing 2, a spring 3, a rotating shaft 5, a pad 12, a valve moving plate 11, a valve stationary plate 8, and a valve moving plate fixing seat 9. The rotating shaft 5 has an arc-shaped groove 10. The motor output shaft 4 is connected to the rotating shaft 5. The motor output shaft 4 is sequentially mounted with the planar thrust ball bearing 2, the butterfly spring 3, and the rotating shaft 5 from bottom to top. The rotating shaft 5 is connected to the steel ball pad 12 and the valve moving plate 11. The valve stationary plate 8 is then fixed to the valve moving plate 11 through the valve fixing seat 9, allowing the two contact surfaces of the valve stationary plate 8 and the valve moving plate 11 to self-adapt, ensuring complete contact between the two contact surfaces and preventing leakage.

[0015] Example 2

[0016] Reference Figure 2 In the second embodiment of this utility model, the motor output shaft 4 is a hollow structure, and the rotating shaft 5 is embedded in the compression spring 13 and fixed in the motor output shaft 4. The rotating shaft 5 is also provided with an arc-shaped groove 10. The rotating shaft 5 is connected to the steel ball pad 12 and the valve moving plate 11. The valve stationary plate 8 is then fixed to the valve moving plate 11 through the valve fixing seat 9, so that the two mating planes of the valve stationary plate 8 and the valve moving plate 11 are self-adaptive, ensuring that the two mating surfaces are completely mated and preventing leakage.

[0017] Example 3

[0018] Reference Figure 3In the third embodiment of this utility model, the motor output shaft 4 is a hollow structure, and the integrated rotating shaft 14 is embedded in the compression spring 13 and fixed in the motor output shaft 4. The integrated rotating shaft 14 is provided with an arc-shaped protrusion structure 15. The integrated rotating shaft 14 is connected to the steel ball pad 12 and the valve moving plate 11. The valve stationary plate 8 is then fixed to the valve moving plate 11 through the valve fixing seat 9, so that the two mating planes of the valve stationary plate 8 and the valve moving plate 11 are self-adaptive, ensuring that the two mating surfaces are completely mated and preventing leakage.

Claims

1. A valve sealing surface adaptive structure, characterized in that: It comprises a motor output shaft, a flat thrust ball bearing, a spring, a rotating shaft, a pad, a moving valve plate, a stationary valve plate, and a valve fixing seat. The rotating shaft has an arc-shaped structure. The motor output shaft is connected to the rotating shaft. The flat thrust ball bearing, spring, and rotating shaft are installed sequentially from bottom to top on the motor output shaft. The rotating shaft is connected to the pad and the moving valve plate. The stationary valve plate is then fixed to the moving valve plate by the valve fixing seat.

2. The valve sealing surface adaptive structure according to claim 1, characterized in that: The spring is a disc spring or a compression spring.

3. The valve sealing surface adaptive structure according to claim 1, characterized in that: The arc-shaped structure on the rotating shaft is an upwardly convex arc-shaped structure. It is formed by setting an arc-shaped groove on the rotating shaft and a matching steel ball cooperating with the arc-shaped groove to form a convex arc-shaped structure, or by having an upwardly convex arc-shaped structure at the top of the rotating shaft.

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