Wear-resistant ball valve

Abstract

The utility model discloses a wear-resisting ball valve which comprises a valve body, a flow channel is formed in the valve body, a ball body is arranged in the flow channel, a valve rod connected with the ball body is further arranged in the valve body, an actuator for driving the ball body to rotate is arranged on the valve body, a supporting base is arranged in the valve body, a connecting hole is formed in the supporting base, and the valve rod is connected with the valve rod. A rotating face is formed on one side of the ball body, a connecting rod is arranged on the rotating face in a protruding mode, a rotating ring groove is formed in the supporting base, a plurality of rotating balls are arranged in the rotating ring groove, the rotating balls are arranged in the rotating ring groove and partially located outside, and when the connecting rod is inserted into the connecting hole, the rotating balls are tightly attached to the rotating face. The ball valve has the advantages that friction between the ball body and the valve is changed into rolling friction from static friction, and abrasion of the valve in use can be reduced.

Description

Technical Field

[0001] The utility model relates to the field of valves, and more specifically, it relates to an abrasion-resistant ball valve. Background Art

[0002] A ball valve is a fluid control device with extremely wide applications. Due to its advantages such as simple structure, rapid opening and closing, and good sealing performance, it is widely used in industrial fields such as petroleum, chemical industry, natural gas, electric power, metallurgy, pharmaceuticals, and urban water supply and drainage. Its core working principle is that the driving device drives the valve stem to rotate, and then the ball arranged in the valve cavity rotates.

[0003] In the prior art, when operating the valve, the driving device needs to overcome the static friction force to start the rotation of the ball. This not only increases the operating torque and burdens the driving device, but more importantly, at the moment of overcoming the static friction force, there will be a violent relative slip between the ball and the valve body. Each opening and closing requires a conversion from static friction to dynamic friction, and the instantaneous high shear force in the static friction stage is one of the main factors causing wear on the surface of the ball. This wear will be further aggravated in media containing tiny solid particles.

[0004] Therefore, there is an urgent need for a new ball valve structure that can effectively improve the friction state between the ball and the valve body and reduce the static friction wear during opening and closing. Summary of the Utility Model

[0005] The utility model provides an abrasion-resistant ball valve, aiming to solve the problem that the ball and the valve body in the prior art are prone to large wear and damage.

[0006] To achieve the above object, the utility model provides the following technical solution: An abrasion-resistant ball valve includes a valve body. A flow channel is formed in the valve body. A ball is arranged in the flow channel. A valve stem connecting the ball is also arranged in the valve body. An actuator for driving the ball to rotate is arranged on the valve body. A support base is arranged in the valve body. A connecting hole is formed on the support base. A rotating surface is formed on one side of the ball. A connecting rod protrudes from the rotating surface. A rotating ring groove is arranged on the support base. A number of rotating balls are arranged in the rotating ring groove. The rotating balls are arranged in the rotating ring groove and partially located outside. When the connecting rod is inserted into the connecting hole, the rotating balls are in close contact with the rotating surface.

[0007] The utility model has the following effects: By arranging the rotating ring groove and the rotating balls, the friction between the ball and the valve body is converted from static friction to rolling friction, which can greatly reduce wear. At the same time, the rolling friction makes the valve body easier to open and close during opening and closing. And the cooperation of the connecting rod and the connecting hole is arranged to play a positioning role and facilitate assembly.

[0008] The present utility model further provides that: elastic protrusions are arranged on the support base, the elastic protrusions are arranged at the bottom of the rotating ring groove, several rotating depressions corresponding to the rotating balls are formed on the elastic protrusions, the elastic protrusions include elastic parts, the rotating depressions are arranged on the elastic parts, and a disc spring is arranged at the bottom of the elastic parts.

[0009] The present utility model has the following effects: by arranging the elastic parts and the disc spring, the rotating balls are elastically supported, ensuring that all the rotating balls can closely adhere to the sphere. At the same time, when the rotating sphere wears, it can still closely adhere to the sphere, and there is a certain adjustment space for the size of the rotating balls, enabling spheres with certain differences to still be close to the sphere under elastic support, with a wider applicable range and better applicability and practicality.

[0010] The present utility model further provides that: a detachable bottom cover is arranged on the valve body, a first clamping groove is arranged on the side of the bottom cover facing the inside of the valve body, a clamping block is arranged in the first clamping groove, multiple clamping blocks are arranged and evenly distributed on the bottom cover, a second clamping groove is arranged on the rotating base for cooperation, the bottom cover is fixed to the valve body, the rotating base is clamped in the first clamping groove, and the clamping blocks are inserted and matched with the second clamping groove.

[0011] The present utility model has the following effects: the bottom cover is arranged at the bottom, and when replacing, it can be replaced from the bottom, which is more convenient. And by arranging the clamping blocks to cooperate with the second clamping groove, the bottom cover and the rotating base are relatively fixed and will not rotate, facilitating the rotation of the sphere.

[0012] The present utility model further provides that: a third clamping groove for cooperating with the second clamping groove is arranged on the valve body. When the rotating base is fixed, a clamping gap is formed relatively between the second clamping groove and the third clamping groove.

[0013] The present utility model has the following effects: a fixation is formed between the rotating base and the valve body, and the fixation is more stable.

[0014] The present utility model further provides that: a sealing ring is arranged in the valve body, and a sealing spring for connecting the sealing ring is arranged in the valve body.

[0015] The present utility model has the following effects: by arranging the sealing ring, the gap between the rotating base and the valve body is sealed to prevent leakage. At the same time, by arranging the sealing spring, it ensures that the sealing ring closely adheres to the rotating base, guaranteeing the stable sealing performance.

[0016] The present utility model further provides that: a limiting protrusion is arranged in the valve body, and a sealing gap for arranging the sealing ring is formed between the limiting protrusion and the valve body.

[0017] The utility model has the following effects: a limiting protrusion is provided. After the rotating base is installed in place from the lower end, a sealing ring is placed, and the limiting protrusion can limit it, facilitating to know whether the installation is in place.

[0018] The utility model has the following effects: the rotating surface is a curved surface, and a rotating recess is provided on the rotating base to cooperate with it.

[0019] The utility model has the following effects: the rotating surface is set as a curved surface, which can better position the sphere and the rotating base and prevent deviation between the two. Description of the Drawings

[0020] Figure 1 is a structural diagram of an embodiment of the utility model;

[0021] Figure 2 is an enlarged view of part A;

[0022] Figure 3 is a three-dimensional view of the support base of the utility model.

[0023] In the figure: 1, valve body; 2, flow channel; 3, sphere; 31, rotating surface; 32, connecting rod; 4, support base; 41, rotating ring groove; 42, rotating ball; 5, elastic protrusion; 51, rotating recess; 52, disc spring; 6, bottom cover; 61, first clamping groove; 62, clamping block; 63, second clamping groove; 64, third clamping groove; 7, sealing ring; 71, sealing spring; 8, limiting protrusion. Detailed Description of the Invention

[0024] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0025] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0026] Refer to Figures 1 to 3 for further description of the embodiments of the present utility model.

[0027] A wear-resistant ball valve, comprising a valve body 1, a flow channel 2 is formed inside the valve body 1, a ball 3 is arranged inside the flow channel 2, a valve stem connecting the ball 3 is further arranged inside the valve body 1, an actuator for driving the ball 3 to rotate is arranged on the valve body 1, a support base 4 is arranged inside the valve body 1, a connection hole is formed on the support base 4, a rotating surface 31 is formed on one side of the ball 3, a connecting rod 32 protrudes from the rotating surface 31, a rotating ring groove 41 is arranged on the support base 4, a plurality of rotating balls 42 are arranged inside the rotating ring groove 41, the rotating balls 42 are arranged inside the rotating ring groove 41 and partially located outside, when the connecting rod 32 is inserted into the connection hole, the rotating balls 42 are in close contact with the rotating surface 31. By providing the rotating ring groove 41 and the rotating balls 42, the friction between the ball 3 and the valve body 1 is converted from static friction to rolling friction, which can greatly reduce wear. At the same time, the rolling friction enables the valve body 1 to be opened and closed more easily during opening and closing, and the cooperation of the connecting rod 32 and the connection hole is provided to play a positioning role and facilitate assembly.

[0028] An elastic protrusion 5 is arranged on the support base 4, the elastic protrusion 5 is arranged at the bottom of the rotating ring groove 41, a plurality of rotating depressions 51 corresponding to the rotating balls 42 are formed on the elastic protrusion 5, the elastic protrusion 5 includes an elastic part, the rotating depressions 51 are arranged on the elastic part, and a disc spring 52 is arranged at the bottom of the elastic part. The provision of the elastic part and the disc spring 52 enables the rotating balls 42 to obtain elastic support, ensuring that all the rotating balls 42 can be in close contact with the ball 3. At the same time, when the ball 3 is worn, the rotating balls 42 can still be in close contact with the ball 3, and the size of the rotating balls 42 has a certain adjustment space, so that balls 3 with certain differences can still be close to the ball 3 under elastic support, with a wider adaptation range and better applicability and practicability.

[0029] A detachable bottom cover 6 is arranged on the valve body 1, a first clamping groove 61 is arranged on the side of the bottom cover 6 facing the inside of the valve body 1, a clamping block 62 is arranged inside the first clamping groove 61, a plurality of clamping blocks 62 are arranged and evenly arranged on the bottom cover 6, a second clamping groove 63 is arranged on the rotating base and is matched with it, the bottom cover 6 is fixed to the valve body 1, the rotating base is clamped in the first clamping groove 61, and the clamping block 62 is inserted and matched with the second clamping groove 63. The bottom cover 6 is arranged at the bottom, and when replacing, it can be replaced from the bottom, which is more convenient. And the cooperation of the clamping block 62 and the second clamping groove 63 is provided, so that the bottom cover 6 and the rotating base are relatively fixed and will not rotate, facilitating the rotation of the ball 3.

[0030] A third clamping groove 64 for cooperating with the second clamping groove 63 is formed on the valve body 1. When the rotating base is fixed, the second clamping groove 63 and the third clamping groove 64 are opposite to form a clamping gap, so as to form a fixation between the rotating base and the valve body 1, and the fixation is more stable.

[0031] A sealing ring 7 is arranged inside the valve body 1, and a sealing spring 71 connecting the sealing ring 7 is arranged inside the valve body 1. The sealing ring 7 is provided to seal between the rotating base and the valve body 1 to prevent leakage. At the same time, the sealing spring 71 is provided to ensure that the sealing ring 7 closely adheres to the rotating base, ensuring the stability of the sealing performance. Also, a sealing ring 7 is provided on the bottom cover 6, which can ensure the sealing performance between the bottom cover 6 and the valve.

[0032] A limiting protrusion 8 is arranged inside the valve body 1, and a sealing gap for arranging the sealing ring 7 is formed between the limiting protrusion 8 and the valve body 1. The limiting protrusion 8 is provided. After the rotating base is installed in place from the lower end and the sealing ring 7 is placed, the limiting protrusion 8 can limit it, facilitating knowing whether it is installed in place.

[0033] The rotating surface 31 is a curved surface, and a rotating recess 51 matching therewith is arranged on the rotating base. The rotating surface 31 is set as a curved surface, which can better position the sphere 3 and the rotating base, preventing deviation between the two. According to the actual situation, there are two different cases, one is a plane and the other is a curved surface. The curved surface is more convenient for installation and positioning, while the plane is easier to process and is convenient for adjustment according to the actual situation.

[0034] This specific embodiment is only an explanation of the present invention, and it is not a limitation of the present invention. After reading this specification, those skilled in the art can make modifications to this embodiment without creative contributions as needed, but as long as it is within the scope of the claims of the present invention, it is protected by the patent law.

Claims

1. A wear-resistant ball valve, comprising a valve body, a flow passage is formed in the valve body, a ball is arranged in the flow passage, a valve stem connecting the ball is further arranged in the valve body, and an actuator for driving the ball to rotate is arranged on the valve body, and the characteristics are as follows: A support base is arranged inside the valve body. A connection hole is formed on the support base. A rotating surface is formed on one side of the sphere. A connecting rod protrudes from the rotating surface. A rotating ring groove is arranged on the support base. A number of rotating balls are arranged in the rotating ring groove. The rotating balls are arranged in the rotating ring groove and partially located outside. When the connecting rod is inserted into the connection hole, the rotating balls are in close contact with the rotating surface.

2. The wear-resistant ball valve according to claim 1, wherein: An elastic protrusion is arranged on the support base. The elastic protrusion is arranged at the bottom of the rotating ring groove. A number of rotating depressions corresponding to the rotating balls are formed on the elastic protrusion. The elastic protrusion includes an elastic part. The rotating depressions are arranged on the elastic part. A disc spring is arranged at the bottom of the elastic part.

3. The wear-resistant ball valve according to claim 1, characterized in that: A detachable bottom cover is arranged on the valve body. A first clamping groove is arranged on the side of the bottom cover facing the inside of the valve body. A clamping block is arranged in the first clamping groove. A plurality of clamping blocks are arranged and evenly arranged on the bottom cover. A second clamping groove for cooperation is arranged on the rotating base. The bottom cover is fixed to the valve body. The rotating base is clamped in the first clamping groove. The clamping blocks are inserted and matched with the second clamping groove.

4. The wear-resistant ball valve according to claim 3, characterized in that: A third clamping groove for cooperation with the second clamping groove is formed on the valve body. When the rotating base is fixed, the second clamping groove and the third clamping groove are opposite to form a clamping gap.

5. A wear-resistant ball valve according to claim 4, characterized in that: A sealing ring is arranged inside the valve body. A sealing spring for connecting the sealing ring is arranged inside the valve body.

6. The wear-resistant ball valve according to claim 5, characterized in that: A limiting protrusion is arranged inside the valve body. A sealing gap for arranging the sealing ring is formed between the limiting protrusion and the valve body.

7. A wear-resistant ball valve according to claim 5, characterized in that: The rotating surface is a curved surface. A rotating depression for cooperation is arranged on the rotating base.

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