Floating type high-frequency ball valve

Abstract

The utility model provides a floating type high-frequency ball valve which comprises a valve body, a valve ball installed in the valve body, a valve rod driving the valve ball to rotate and valve seats connected to the two sides of the valve ball in an abutting mode, and an elastic piece is axially connected between the valve seat on at least one side and the valve body in an abutting mode. The opposite end faces of the elastic piece and the valve seat are parallel and attached to each other. By arranging the elastic piece parallel to and attached to the outer side of the valve seat, a medium is prevented from entering the space between the elastic piece and the valve seat to affect work of the elastic piece, the function of maintaining stable operation of high-frequency action of the ball valve is achieved, and the problem that the abutting position of the valve seat and the valve ball leaks due to failure of the elastic piece is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a floating high-frequency ball valve. Background Art

[0002] A floating ball valve is a special type of ball valve whose ball can float freely in the valve body. When subjected to medium pressure, the ball can automatically adjust its position to ensure a close fit with the valve seat, thereby achieving an efficient sealing effect. Under some working conditions, the floating ball valve needs to be operated frequently. Its stability and sealing performance under high-frequency operation are conducive to improving the efficiency and quality of medium transportation.

[0003] Chinese patent CN217762161U discloses a floating all-metal hard-to-hard bidirectional sealing cut-off ball valve, including a valve body, a valve seat arranged inside the valve body, a valve ball arranged inside the valve seat, and a valve stem passing through the valve body and arranged above the valve ball. Corresponding fluid channels are provided inside the valve body, the valve seat and the valve ball. The valve body is composed of a main valve body and a sub-valve body fixed to each other. A circle of grooves is provided at the part of the main valve body corresponding to the outer side of the valve seat, and an annular spring is provided in the groove, so that the valve seat can be pushed toward the valve ball by the elastic force of the spring to ensure the sealing performance of the contact surface between the valve ball and the valve seat. The utility model has a structure in which a circle of grooves is provided at the part of the valve body corresponding to the outer side of the valve seat and an annular disc spring is provided, which has good bidirectional sealing performance and can ensure that the leakage level of the valve seat reaches ANSI / FCI Class VI.

[0004] However, this technical solution has the following problems: first, there is a gap between the contact part of the spring and the valve seat. During high-frequency operation, the medium can easily enter the gap, affecting the operation of the spring and causing the medium to leak at the junction of the valve seat and the valve ball; second, a seal is provided between the valve seat and the valve body, which can easily cause the medium to leak at the connection between the valve seat and the valve body. Utility Model Content

[0005] The purpose of the utility model is to provide a floating high-frequency ball valve in view of the shortcomings of the prior art. By arranging an elastic member parallel to and fitted to the outer side of the valve seat, the medium is prevented from entering the space between the elastic member and the valve seat to affect the operation of the elastic member, thereby achieving the function of maintaining the high-frequency operation of the ball valve and stably operating, and solving the problem of leakage at the junction of the valve seat and the valve ball caused by failure of the elastic member.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A floating high-frequency ball valve comprises a valve body, a valve ball installed in the valve body, a valve stem for driving the valve ball to rotate, and valve seats abutting against both sides of the valve ball. An elastic member is axially abutted between the valve seat and the valve body on at least one side. The elastic member and the opposite end faces of the valve seat are parallel and fit each other.

[0008] As a preferred embodiment, the elastic member is a butterfly spring and is in a pre-tightened state.

[0009] As a preference, the outer side surface of the valve seat is arranged closely against the inner wall of the valve body, and a first sealing ring is provided at the position where the outer side surface of the valve seat abuts against the valve ball.

[0010] As a preference, the valve body is provided with a discharge slope on the outer side corresponding to the valve seat, and at least one sealing member is provided at the position where the valve body abuts against the valve seat.

[0011] As a preference, the valve seat is arranged in sections, comprising a valve seat body abutting against the valve ball and a base axially abutting against the outer side of the valve seat.

[0012] Preferably, a groove is provided on the outer end surface of the base in a circumferentially inclined manner, and the elastic member abuts against the groove.

[0013] As a preference, a second sealing ring is provided between the base and the elastic member, and the second sealing ring abuts against the inner wall of the valve body.

[0014] As a preference, the valve body is arranged in sections and is sealed and connected.

[0015] As a preference, the lower end of the valve stem is connected to the valve ball, and the upper end extends out of the valve body and is sealedly connected to the valve body.

[0016] Preferably, a packing assembly is provided between the valve stem and the valve body, and the packing assembly comprises a packing box and a pressure cover for pressing the packing in the packing box downward.

[0017] The beneficial effects of the utility model are:

[0018] (1) The utility model arranges the elastic member in parallel with the valve seat or base and arranges a discharge shoe surface on the outside thereof to prevent external media from entering between the elastic member and the valve seat or base and affecting the operation of the elastic member, and avoids the accumulation of media outside the elastic member, so that the elastic member can maintain stability when the ball valve is operated at a high frequency, thereby extending the service life of the elastic member and improving the sealing effect.

[0019] (2) The utility model improves the sealing effect between the valve seat and the valve ball by providing a first sealing ring in cooperation with the elastic member to exert pressure on the valve seat. When the ball valve is operated at a high frequency, leakage is less likely to occur at the abutment between the ball valve and the valve seat.

[0020] (3) The utility model improves the sealing effect between the valve seat and the valve body by setting the outer side surface of the valve seat in close contact with the inner wall of the valve body, and cooperates with the sealing member arranged therebetween, thereby preventing the medium from entering the middle cavity of the ball valve from the connection between the valve seat and the valve body.

[0021] (4) The utility model provides a heat-resistant second sealing ring between the valve seat and the valve body, so that the utility model can maintain the seal between the valve seat and the valve body even under high temperature conditions, thereby expanding the scope of application of the utility model.

[0022] In summary, the utility model has the advantages of good sealing effect, wide application range, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of the first embodiment of the utility model;

[0024] Figure 2 For this utility model Figure 1 The local enlarged schematic diagram of point I in the middle;

[0025] Figure 3 This is a schematic diagram of the overall structure of the second embodiment of the utility model;

[0026] Figure 4 For this utility model Figure 3 A partial enlarged schematic diagram of point II in the middle. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the equipment or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0029] Embodiment 1

[0030] like Figure 1-4 As shown, this embodiment provides a floating high-frequency ball valve, including a valve body 1, a valve ball 2 installed in the valve body 1, a valve stem 3 driving the valve ball 2 to rotate, and a valve seat 4 abutting against both sides of the valve ball 2. An elastic member 5 is axially abutted between the valve seat 4 and the valve body 1 on at least one side, and the elastic member 5 is parallel to the opposite end surface of the valve seat 4 and fits each other. It should be noted that in normal use, the side where the elastic member 5 is provided is generally the upstream of the pipeline. When the valve is closed, the upstream medium pressure is consistent with the direction of the force of the elastic member 5, so that the valve remains sealed. The elastic member 5 is a butterfly spring and is in a pre-tightened state.

[0031] The elastic member 5 is arranged parallel to the valve seat 4 to prevent external media from entering between the elastic member 5 and the valve seat 4 to affect the operation of the elastic member 5, so that the elastic member 5 can maintain stability during high-frequency operation of the ball valve, thereby improving the sealing effect.

[0032] like Figure 1 , 2 As shown, the outer side surface of the valve seat 4 is arranged tightly against the inner wall of the valve body 1 to improve the sealing effect between the valve seat 4 and the valve body 1. A first sealing ring 6 is provided at the abutment between the valve seat 4 and the valve ball 2, and the pressure given to the valve seat 4 by the elastic member 5 further improves the sealing effect between the valve seat 4 and the valve ball 2.

[0033] like Figure 2 , 4As shown, the valve body 1 is provided with a discharge slope 11 corresponding to the outer side of the valve seat 4, and at least one sealing member 12 is provided at the abutment between the valve body 1 and the valve seat 4. The discharge slope 11 is provided to prevent the medium from accumulating between the valve seat 4 and the valve body 1 and affecting the action of the elastic member 5, and the sealing member 12 is provided to prevent the medium from entering the middle cavity of the ball valve from the connection between the valve seat 4 and the valve body 1.

[0034] like Figure 1 , 3 As shown, the valve body 1 is arranged in sections and sealed. The lower end of the valve stem 3 is connected to the valve ball 2, and the upper end extends out of the valve body 1 and is sealed to the valve body 1. A packing assembly 8 is also arranged between the valve stem 3 and the valve body 1, and the packing assembly 8 includes a packing box 81 and a gland 82 that presses the packing in the packing box 81 downward to prevent the medium from leaking from the valve stem.

[0035] Embodiment 2

[0036] like Figure 3 , 4 As shown, the components identical or corresponding to those in the first embodiment are marked with the corresponding reference numerals in the first embodiment. For the sake of simplicity, only the differences from the first embodiment are described below. The second embodiment is different from the first embodiment in that the valve seat 4 is arranged in sections, and includes a valve seat body 41 abutting against the valve ball 2 and a base 42 axially abutting against the outer side of the valve seat 4.

[0037] like Figure 4 As shown, a groove 421 is circumferentially inclined on the outer end surface of the base 42 , the elastic member 5 abuts against the groove 421 , and the inner side surface of the elastic member 5 and the surface opposite to the groove 421 are tightly fitted with the groove 421 .

[0038] By providing the groove 421 to cooperate with the elastic member 5 , there is no gap between the elastic member 5 and the base 42 , and the medium cannot enter, so that the elastic member 5 moves more stably and the service life of the elastic member 5 is extended.

[0039] like Figure 4 As shown, a second sealing ring 7 is provided between the base 42 and the valve seat body 42 , and the second sealing ring 7 abuts against the inner wall of the valve body 1 . The second sealing ring 7 is made of a heat-resistant material, preferably graphite.

[0040] By providing the heat-resistant second sealing ring 7, the utility model can maintain the seal between the valve seat 4 and the valve body 1 even under high temperature conditions, thereby expanding the application scope of the utility model.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A floating high-frequency ball valve, comprising a valve body, a valve ball installed in the valve body, a valve stem for driving the valve ball to rotate, and valve seats abutting against both sides of the valve ball, characterized in that: An elastic member is axially abutted between the valve seat and the valve body on at least one side, and the elastic member and the opposite end surface of the valve seat are parallel and fit each other.

2. A floating high-frequency ball valve according to claim 1, characterized in that: The elastic member is a butterfly spring and is in a pre-tightened state.

3. A floating high-frequency ball valve according to claim 1, characterized in that: The outer side surface of the valve seat is arranged closely against the inner wall of the valve body, and a first sealing ring is arranged at the position where the outer side surface of the valve seat abuts against the valve ball.

4. A floating high-frequency ball valve according to claim 1, characterized in that: The valve body is provided with a discharge inclined surface on the outer side corresponding to the valve seat, and at least one sealing member is provided at the position where the valve body abuts against the valve seat.

5. A floating high-frequency ball valve according to claim 1, characterized in that: The valve seat is arranged in sections, and comprises a valve seat body abutting against the valve ball and a base axially abutting against the outer side of the valve seat.

6. A floating high-frequency ball valve according to claim 5, characterized in that: The outer end surface of the base is provided with a groove which is inclined in the circumferential direction, and the elastic member abuts against the groove.

7. A floating high-frequency ball valve according to claim 6, characterized in that: A second sealing ring is arranged between the base and the elastic member, and the second sealing ring abuts against the inner wall of the valve body.

8. The floating high-frequency ball valve according to claim 1, characterized in that: The valve body is arranged in sections and is sealed and connected.

9. The floating high-frequency ball valve according to claim 1, characterized in that: The lower end of the valve stem is connected to the valve ball, and the upper end extends out of the valve body and is sealed and connected to the valve body.

10. The floating high-frequency ball valve according to claim 1, characterized in that: A packing assembly is also arranged between the valve stem and the valve body, and the packing assembly includes a packing box and a gland for pressing the packing in the packing box downwards.

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