Composite valve core for V-shaped ball valve

Abstract

The utility model discloses a combined type valve core for a V-shaped ball valve, which relates to the technical field of V-shaped ball valves and comprises a valve body, a valve rod and a hemispherical sleeve, the hemispherical sleeve is arranged inside a ball cavity of the valve body through the valve rod, a sealing piece is arranged at one end of the valve body corresponding to the inside of the ball cavity, and turbine blades are arranged at the position of the valve rod corresponding to the inside of the hemispherical sleeve. The two turbine blades are arranged in the vertical direction, a fluid block is arranged between the two turbine blades, and backflow arc plates are rotationally installed on the two sides of the fluid block. According to the overall structure, the fluid block is additionally arranged on the basis of the hemispherical sleeve, the fluid block has high freedom degree in the ball cavity of the valve body, specifically, the deflection direction can be switched along with the flowing state of fluid, the outer wall angle of the fluid block corresponding to the flowing direction of the fluid is further limited, and in this way, the fluid block is freely deflected on the basis of adapting to fluid pressure; and the burden on the whole sealing structure is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of V-type ball valves, in particular to a composite valve core for a V-type ball valve. Background Art

[0002] The inner cavity of the ball of the V-type ball valve is V-shaped, and a V-shaped groove is formed between the surface of the ball and the sealing surface. This structure enables the V-type ball valve to achieve better sealing performance when closed and reduces the risk of leakage. It should be noted that there is only one sealing structure corresponding to the arc surface of the ball in the V-type ball valve, and this sealing structure is mainly arranged at the inlet position of the V-type ball valve, so that it has better sealing performance.

[0003] What needs to be further explained is that: based on the V-type valve adjusting the angle to switch the fluid on and off and the flow rate, at the moment the angle of the ball changes, the fluid will produce a large instantaneous impact force on the ball, which in turn increases the workload of the ball and the sealing structure. In particular, the direction of the instantaneous impact force is uncertain. Under repeated impacts during long-term operation, the sealing structure or the ball will be damaged, thereby reducing the sealing performance.

[0004] To this end, this application proposes a solution. Utility Model Content

[0005] The utility model aims to provide a composite valve core for a V-type ball valve, which is used to solve the problem that the existing V-type ball valve generates instantaneous impact force when the ball angle is switched during long-term operation, and further because the direction of the instantaneous impact force is uncertain, its density structure is damaged and the sealing performance is reduced.

[0006] The purpose of the utility model can be achieved through the following technical solutions: a composite valve core for a V-type ball valve, comprising a valve body, a valve stem and a semi-spherical sleeve, wherein the semi-spherical sleeve is arranged inside a ball cavity of the valve body through the valve stem, a sealing member is arranged at one end of the valve body corresponding to the inner position of the ball cavity, a turbine blade is arranged at an inner position of the valve stem corresponding to the semi-spherical sleeve, the turbine blade is arranged in a vertical direction and the number of the turbine blades is two, and a fluid block is arranged between the two turbine blades;

[0007] Reverse flow arc plates are rotatably installed on both sides of the fluid block, the outer curved surface of the reverse flow arc plate has the same curvature as the outer curved surface of the fluid block, the fluid block is respectively provided with a rear inclined portion and a front inclined portion along its length direction, and an inner inclined portion is provided at the inner position of the fluid block corresponding to the reverse flow arc plate.

[0008] It is further configured as follows: the turbine blades are rotationally connected at the center point of the valve stem, and the fluid block and the turbine blades are rotationally connected.

[0009] It is further configured as follows: the cross section of the rear oblique portion from top to bottom is conical, the cross section of the front oblique portion from top to bottom is round head-shaped, and the width of the front oblique portion along the width direction of the fluid block is greater than the width of the rear oblique portion along the width direction of the body block.

[0010] It is further configured as follows: the front end of the anti-flow arc plate matches the outer curved surface of the front oblique portion, and a gap is provided at the position where the two anti-flow arc plates contact each other.

[0011] It is further configured that: the inner inclined portion is in a bidirectional cone shape along a cross section from top to bottom, and the inclination angle of the outer wall of the inner inclined portion corresponding to the front inclined portion is greater than the inclination angle of the outer wall of the inner inclined portion corresponding to the rear inclined portion.

[0012] The utility model has the following beneficial effects:

[0013] 1. The overall structure is based on the hemispherical sleeve of the V-type ball valve, and a fluid block is added. The fluid block has a high degree of freedom on the basis of non-interference with the hemisphere, which is manifested as: free deflection according to the flow state of the fluid. In order to further adapt to the fluid state, the outer wall angle of the fluid block corresponding to the flow direction of the fluid is designed to better adapt to the flow state of the fluid, so that the fluid block can "consume" the instantaneous pressure of the fluid on the basis of free deflection;

[0014] 2. On the basis of the above, a reverse flow arc plate is further arranged in the fluid block, and the reverse flow arc plate further restricts the fluid block according to the flow state of the fluid. Its main purpose is: when there is a state of fluid recoil, the reverse flow arc plate is prompted to open by the pressure of the fluid itself, thereby further reducing the impact of fluid recoil on the sealing structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 This is a structural schematic diagram of a composite valve core for a V-type ball valve proposed by the utility model;

[0017] Figure 2 This is a cross-sectional view of a valve body of a composite valve core for a V-type ball valve proposed in the utility model;

[0018] Figure 3 This is a structural schematic diagram of a semi-ball sleeve in a composite valve core for a V-type ball valve proposed by the utility model;

[0019] Figure 4A composite valve core for a V-type ball valve proposed in the utility model Figure 3 Split diagram of ;

[0020] Figure 5 The utility model discloses a cross-sectional view of a fluid block in a composite valve core for a V-type ball valve.

[0021] In the figure: 1, valve body; 2, valve stem; 3, hemispherical sleeve; 4, reverse flow arc plate; 5, turbine blade; 6, fluid block; 601, rear oblique part; 602, front oblique part; 603, inner oblique part. DETAILED DESCRIPTION

[0022] The technical solution of the utility model will be described clearly and completely in conjunction with the embodiments below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. 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.

[0023] Embodiment 1

[0024] For V-type valves, at the moment when the ball angle changes, the fluid will generate a large instantaneous impact force on the ball, which in turn increases the workload of the ball and the sealing structure. In particular, the direction of the instantaneous impact force is uncertain. Under repeated impacts during long-term operation, the sealing structure or ball is damaged, thereby reducing the sealing performance. The following technical solutions are proposed:

[0025] Reference Figures 1 to 5 In this embodiment, a composite valve core for a V-type ball valve includes a valve body 1, a valve stem 2 and a semi-spherical sleeve 3. The semi-spherical sleeve 3 is arranged inside the ball cavity of the valve body 1 through the valve stem 2. A sealing member is arranged at one end of the valve body 1 corresponding to the inner position of the ball cavity. A turbine blade 5 is arranged at an inner position of the valve stem 2 corresponding to the semi-spherical sleeve 3. The turbine blade 5 is arranged in a vertical direction and the number of the turbine blades is two. A fluid block 6 is arranged between the two turbine blades 5.

[0026] Reverse flow arc plates 4 are rotatably installed on both sides of the fluid block 6. The curvature of the outer curved surface of the reverse flow arc plate 4 is equal to that of the outer curved surface of the fluid block 6. The fluid block 6 is provided with a rear inclined portion 601 and a front inclined portion 602 along its length direction, and an inner inclined portion 603 is provided at the inner position of the fluid block 6 corresponding to the reverse flow arc plate 4. The turbine blade 5 is rotatably connected at the center point of the valve stem 2, and the fluid block 6 and the turbine blade 5 are rotatably connected.

[0027] The rear oblique portion 601 is conical in cross section from top to bottom, the front oblique portion 602 is rounded in cross section from top to bottom, and the width of the front oblique portion 602 along the width direction of the fluid block 6 is greater than the width of the rear oblique portion 601 along the width direction of the body block 6.

[0028] Technical principle: The location where the seal is set is the water inlet. Figure 2 To explain, when the fluid enters from the right side of the valve body 1 and the hemispherical sleeve 3 opens, when the opening angle of the hemispherical sleeve 3 increases, resulting in an increase in flow rate, the instantaneous fluid pressure will first cause the turbine blade 5 to accelerate its rotation until the fluid pressure stabilizes and the turbine blade 5 maintains a uniform rotation. The purpose of this method is to use the simple structure of the turbine blade 5 to "consume" a part of the fluid pressure;

[0029] The fluid block 6 is the key structure, refer to Figure 5 Specifically, when the fluid is in a flowing state, due to the action of the rear inclined portion 601 and the front inclined portion 602, the fluid block 6 is forced to set the overall direction from right to left along the rear inclined portion 601 and the front inclined portion 602 under the action of the fluid. The overall structure has a high degree of freedom. Then, when the fluid pressure changes, the fluid block 6 is freely deflected by the fluid flow state, but it will always maintain the direction from right to left. Under the action of the free deflection of the fluid block 6, a part of the fluid pressure is further "consumed", thereby reducing the influence of the fluid pressure on the seal.

[0030] Embodiment 2

[0031] This embodiment optimizes and improves the fluid block:

[0032] The front end of the reverse flow arc plate 4 matches the outer curved surface of the front inclined portion 602, and a gap is provided at the position where the two reverse flow arc plates 4 contact each other. The inner inclined portion 603 is in a bidirectional cone shape along the cross section from top to bottom, and the inclination angle of the outer wall of the inner inclined portion 603 corresponding to the front inclined portion 602 is greater than the inclination angle of the outer wall of the inner inclined portion 603 corresponding to the rear inclined portion 601.

[0033] Technical principle: as shown in Example 1 and refer to Figure 5 When the fluid flows from right to left, the anti-flow arc plate 4 is contracted on the fluid block 6 by the action of the fluid. This structure can also "consume" part of the fluid pressure based on the first embodiment, but its key role is reflected in the process of the fluid switching from a large flow rate to a small flow rate. The fluid will generate a recoil pressure from left to right. In this process, the fluid first enters the inner oblique portion 603 in the fluid block 6 through the gap between the two anti-flow arc plates 4, and the anti-flow arc plate 4 opens in the direction close to the rear oblique portion 601, so as to withstand the recoil pressure with a larger area, thereby reducing the impact of the recoil pressure on the seal.

[0034] On the basis of the above, the fluid generating the recoil pressure will also cause the fluid block 6 to freely deflect again through the inner inclined portion 603, and simultaneously drive the reverse flow arc plate 4 to freely deflect. In this process, the recoil pressure can be greatly "consumed".

[0035] In summary: a fluid block is added based on the hemispherical sleeve. The fluid block has a high degree of freedom inside the ball cavity of the valve body. Specifically, the deflection direction can be switched according to the flow state of the fluid. The outer wall angle of the fluid block corresponding to the flow direction of the fluid is further limited. In this way, the fluid block can be freely deflected based on the adaptation of the fluid pressure to reduce the burden on the overall sealing structure.

[0036] The above contents are merely examples and explanations of the structure of the utility model. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of the utility model.

[0037] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0038] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is only limited by the claims and their full scope and equivalents.

Claims

1. A composite valve core for a V-type ball valve, comprising a valve body (1), a valve stem (2) and a hemispherical sleeve (3), It is characterized in that The hemispherical sleeve (3) is arranged inside the spherical cavity of the valve body (1) through the valve stem (2); a sealing member is arranged at an inner end position of the valve body (1) corresponding to the spherical cavity; a turbine blade (5) is arranged at an inner position of the hemispherical sleeve (3) corresponding to the valve stem (2); the turbine blade (5) is arranged in a vertical direction and is arranged in two pieces; and a fluid block (6) is arranged between the two turbine blades (5); Reverse flow arc plates (4) are rotatably mounted on both sides of the fluid block (6); the curvature of the outer curved surface of the reverse flow arc plate (4) is equal to that of the outer curved surface of the fluid block (6); the fluid block (6) is provided with a rear inclined portion (601) and a front inclined portion (602) along its length direction; and an inner inclined portion (603) is provided at an inner position of the fluid block (6) corresponding to the reverse flow arc plate (4).

2. A composite valve core for a V-type ball valve according to claim 1, It is characterized in that The turbine blade (5) is rotatably connected at the center point of the valve stem (2), and the fluid block (6) and the turbine blade (5) are rotatably connected.

3. A composite valve core for a V-type ball valve according to claim 1, It is characterized in that The rear oblique portion (601) is conical in shape along a cross section from top to bottom, the front oblique portion (602) is rounded in shape along a cross section from top to bottom, and the width of the front oblique portion (602) along the width direction of the fluid block (6) is greater than the width of the rear oblique portion (601) along the width direction of the body block (6).

4. A composite valve core for a V-type ball valve according to claim 1, It is characterized in that The front end of the anti-flow arc plate (4) matches the outer curved surface of the front inclined portion (602), and a gap is provided at the position where the two anti-flow arc plates (4) are in contact.

5. A composite valve core for a V-type ball valve according to claim 1, It is characterized in that The inner inclined portion (603) is in a bidirectional cone shape along the cross section from top to bottom, and the outer wall inclination angle of the inner inclined portion (603) corresponding to the front inclined portion (602) is greater than the outer wall inclination angle of the inner inclined portion (603) corresponding to the rear inclined portion (601).

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