Fastening clamp for match grinding of valve ball

Abstract

The utility model discloses a fastening fixture for valve ball match grinding, which comprises a core shaft, a first pressing sleeve, an expansion sleeve, a second pressing sleeve and a nut, the left end of the outer surface of the core shaft is sleeved with the first pressing sleeve, the outer surface of the core shaft is sleeved with the expansion sleeve on the right side of the first pressing sleeve, and the outer surface of the core shaft is sleeved with the second pressing sleeve on the right side of the expansion sleeve. A nut is in threaded connection with the outer surface of the mandrel and located on the right side of the second pressing sleeve, the first pressing sleeve and the second pressing sleeve are the same in size, and the sides, close to the expansion sleeve, of the first pressing sleeve and the second pressing sleeve are of a conical structure. The first pressing sleeve is sleeved on the surface of the mandrel, the expansion sleeve is sleeved on the right side of the first pressing sleeve, the valve ball is sleeved on the surface of the expansion sleeve, the second pressing sleeve is sleeved on the right side of the expansion sleeve, and finally the nut is tightened, so that the expansion sleeve can expand under the matching of the first pressing sleeve and the second pressing sleeve. Therefore, the valve balls with different diameters can be fixed.

Description

TECHNICAL FIELD

[0001] The utility model relates to ball valve technical field, concretely is used for the fastening fixture of valve ball matching grinding. BACKGROUND

[0002] Ball valve is the opening and closing part (ball) is driven by the valve rod, and rotates around the ball valve axis, and is used for the adjustment and control of fluid, and the commercial ball valve needs to pass through the matching grinding process in the manufacturing process to make the valve ball and the valve seat tightly cooperate, reaches the good sealing performance, when matching grinding, in order to make the valve ball fixed on the matching grinding machine, needs to use the fastening fixture to avoid the phenomenon that the valve ball moves and affects the matching grinding accuracy in the matching grinding process, but the existing fastening fixture cannot fix the valve ball of different diameters, and is inconvenient to disassemble, thereby bringing inconvenience for people's use. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims at providing the fastening fixture for valve ball matching grinding to solve the problem in the above background art.

[0004] In order to achieve the above object, the utility model provides the following technical scheme: the fastening fixture for valve ball matching grinding, including mandrel, first pressure cover, expansion sleeve, second pressure cover and nut, the left end of the outer surface of mandrel is sleeved with first pressure cover, the outer surface of mandrel and located the right side of first pressure cover is sleeved with expansion sleeve, the outer surface of mandrel and located the right side of expansion sleeve is sleeved with second pressure cover, the outer surface of mandrel and located the right side of second pressure cover is connected with nut.

[0005] Preferably, the first pressure cover and the second pressure cover are the same size, and the side close to the expansion sleeve of the first pressure cover and the second pressure cover is a tapered structure.

[0006] Preferably, the surface of the mandrel, the first pressure cover, the expansion sleeve, the second pressure cover and the nut is provided with a high-temperature-resistant layer, and the other side of the high-temperature-resistant layer is provided with a wear-resistant layer.

[0007] Preferably, the high-temperature-resistant layer includes an aluminum hydroxide coating and a magnesium hydroxide coating, and the wear-resistant layer includes a tungsten carbide coating and an aluminum oxide coating.

[0008] Preferably, the aluminum hydroxide coating is coated on the surface of the mandrel, the first pressure cover, the expansion sleeve, the second pressure cover and the nut, and the magnesium hydroxide coating is coated on the other side of the aluminum hydroxide coating.

[0009] Preferably, the tungsten carbide coating is coated on the other side of the magnesium hydroxide coating, and the aluminum oxide coating is coated on the other side of the tungsten carbide coating.

[0010] Compared with the prior art, the utility model has the advantages of the following:

[0011] 1. The utility model discloses a first pressure cover is covered in the surface of the mandrel first, then the expansion cover is covered in the right side of first pressure cover, and then the valve ball is covered in the surface of expansion cover, and then the second pressure cover is covered in the right side of expansion cover, finally tight nut, under the cooperation of first pressure cover and second pressure cover expansion cover can expand, thereby can the valve ball of different diameter is fixed and is handled.

[0012] 2. The utility model discloses set up wear -resisting layer, its including alumina coating can carry out first layer wear -resisting protection handling to mandrel, first pressure cover, expansion cover, second pressure cover and nut, and tungsten carbide coating can carry out second layer wear -resisting protection handling to mandrel, first pressure cover, expansion cover, second pressure cover and nut after alumina coating damage, set up high temperature resistance layer, its including magnesium hydroxide coating can carry out first layer high temperature resistance protection handling to mandrel, first pressure cover, expansion cover, second pressure cover and nut, and aluminium hydroxide coating can carry out second layer high temperature resistance protection handling to mandrel, first pressure cover, expansion cover, second pressure cover and nut. ACCURACY

[0013] Figure 1 It is the utility model structure schematic drawing;

[0014] Figure 2 It is the utility model explosion structure schematic drawing;

[0015] Figure 3 It is the utility model high temperature resistance layer and wear -resisting layer and mandrel between connection schematic drawing;

[0016] Figure 4 It is the utility model high temperature resistance layer structure schematic drawing;

[0017] Figure 5 It is the utility model wear -resisting layer structure schematic drawing.

[0018] In the drawing: mandrel 1, first pressure cover 2, expansion cover 3, second pressure cover 4, nut 5, high temperature resistance layer 6, aluminium hydroxide coating 61, magnesium hydroxide coating 62, wear -resisting layer 7, tungsten carbide coating 71, alumina coating 72. SPECIFIC IMPLEMENTATION

[0019] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model and not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0020] The mandrel 1, the first pressing sleeve 2, the expansion sleeve 3, the second pressing sleeve 4, the nut 5, the high-temperature-resistant layer 6, the aluminum hydroxide coating 61, the magnesium hydroxide coating 62, the wear-resistant layer 7, the tungsten carbide coating 71, and the aluminum oxide coating 72 of the present application are all general standard parts or parts known to those skilled in the art, and their structures and principles can be known by technical personnel through technical manuals or through conventional experimental methods. EMBODIMENT

[0021] Please refer to Figure 1 and Figure 2 , the following technical solutions are provided, specifically disclosed: including the mandrel 1, the first pressing sleeve 2, the expansion sleeve 3, the second pressing sleeve 4 and the nut 5, the left end of the outer surface of the mandrel 1 is sleeved with the first pressing sleeve 2, the outer surface of the mandrel 1 and located on the right side of the first pressing sleeve 2 is sleeved with the expansion sleeve 3, the outer surface of the mandrel 1 and located on the right side of the expansion sleeve 3 is sleeved with the second pressing sleeve 4, the outer surface of the mandrel 1 and located on the right side of the second pressing sleeve 4 is threadedly connected with the nut 5, the first pressing sleeve 2 and the second pressing sleeve 4 are the same size, and the side of the first pressing sleeve 2 and the second pressing sleeve 4 close to the expansion sleeve 3 is a conical structure, first, the first pressing sleeve 2 is sleeved on the surface of the mandrel 1, then the expansion sleeve 3 is sleeved on the right side of the first pressing sleeve 2, then the valve ball is sleeved on the surface of the expansion sleeve 3, then the second pressing sleeve 4 is sleeved on the right side of the expansion sleeve 3, and finally the nut 5 is tightened. The expansion sleeve 3 can be expanded under the cooperation of the first pressing sleeve 2 and the second pressing sleeve 4, so that the valve ball of different diameters can be fixed and treated. EMBODIMENT

[0022] Please refer to Figures 3-5 , the following technical solutions are provided, specifically disclosed: the surface of the mandrel 1, the first pressing sleeve 2, the expansion sleeve 3, the second pressing sleeve 4 and the nut 5 is provided with a high-temperature-resistant layer 6, and the other side of the high-temperature-resistant layer 6 is provided with a wear-resistant layer 7, the high-temperature-resistant layer 6 includes an aluminum hydroxide coating 61 and a magnesium hydroxide coating 62, and the wear-resistant layer 7 includes a tungsten carbide coating 71 and an aluminum oxide coating 72, the aluminum hydroxide coating 61 is coated on the surface of the mandrel 1, the first pressing sleeve 2, the expansion sleeve 3, the second pressing sleeve 4 and the nut 5, and the magnesium hydroxide coating 62 is coated on the other side of the aluminum hydroxide coating 61, the tungsten carbide coating 71 is coated on the other side of the magnesium hydroxide coating 62, and the aluminum oxide coating 72 is coated on the other side of the tungsten carbide coating 71, the wear-resistant layer 7 is provided, which includes the aluminum oxide coating 72 and can provide the first layer of wear-resistant protection for the mandrel 1, the first pressing sleeve 2, the expansion sleeve 3, the second pressing sleeve 4 and the nut 5, and the tungsten carbide coating 71 can provide the second layer of wear-resistant protection for the mandrel 1, the first pressing sleeve 2, the expansion sleeve 3, the second pressing sleeve 4 and the nut 5 after the aluminum oxide coating 72 is damaged. The high-temperature-resistant layer 6 is provided, which includes the magnesium hydroxide coating 62 and can provide the first layer of high-temperature-resistant protection for the mandrel 1, the first pressing sleeve 2, the expansion sleeve 3, the second pressing sleeve 4 and the nut 5, and the aluminum hydroxide coating 61 can provide the second layer of high-temperature-resistant protection for the mandrel 1, the first pressing sleeve 2, the expansion sleeve 3, the second pressing sleeve 4 and the nut 5.

[0023] The working principle of the present application is that the first pressing sleeve 2 is first sleeved on the surface of the mandrel 1, then the expanding sleeve 3 is sleeved on the right side of the first pressing sleeve 2, then the valve ball is sleeved on the surface of the expanding sleeve 3, then the second pressing sleeve 4 is sleeved on the right side of the expanding sleeve 3, and finally the nut 5 is tightened, the expanding sleeve 3 can be expanded under the cooperation of the first pressing sleeve 2 and the second pressing sleeve 4, so that the valve ball of different diameters can be fixed and treated, the wear-resistant layer 7 is arranged, the aluminum oxide coating 72 included in the wear-resistant layer 7 can perform first layer wear-resistant protection treatment on the mandrel 1, the first pressing sleeve 2, the expanding sleeve 3, the second pressing sleeve 4 and the nut 5, and the tungsten carbide coating 71 can perform second layer wear-resistant protection treatment on the mandrel 1, the first pressing sleeve 2, the expanding sleeve 3, the second pressing sleeve 4 and the nut 5 after the aluminum oxide coating 72 is damaged, the high-temperature-resistant layer 6 is arranged, the magnesium hydroxide coating 62 included in the high-temperature-resistant layer 6 can perform first layer high-temperature-resistant protection treatment on the mandrel 1, the first pressing sleeve 2, the expanding sleeve 3, the second pressing sleeve 4 and the nut 5, and the aluminum hydroxide coating 61 can perform second layer high-temperature-resistant protection treatment on the mandrel 1, the first pressing sleeve 2, the expanding sleeve 3, the second pressing sleeve 4 and the nut 5.

[0024] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and modifications can be made to the embodiments without departing from the principles and spirits of the present application, the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A fastening fixture for valve ball fitting, comprising a mandrel (1), a first pressure sleeve (2), a shrink sleeve (3), a second pressure sleeve (4), and a nut (5), characterized in that: A first pressure sleeve (2) is sleeved on the left end of the outer surface of the mandrel (1), an expansion sleeve (3) is sleeved on the outer surface of the mandrel (1) and on the right side of the first pressure sleeve (2), a second pressure sleeve (4) is sleeved on the outer surface of the mandrel (1) and on the right side of the expansion sleeve (3), and a nut (5) is threadedly connected to the outer surface of the mandrel (1) and on the right side of the second pressure sleeve (4).

2. The fastening fixture for valve ball grinding according to claim 1, characterized in that: The first pressure sleeve (2) and the second pressure sleeve (4) have the same size, and the side of the first pressure sleeve (2) and the second pressure sleeve (4) near the expansion sleeve (3) is tapered.

3. The fastening fixture for valve ball mating grinding according to claim 1, characterized in that: The surfaces of the mandrel (1), the first pressure sleeve (2), the expansion sleeve (3), the second pressure sleeve (4) and the nut (5) are all provided with a high temperature resistant layer (6), and the other side of the high temperature resistant layer (6) is provided with a wear-resistant layer (7).

4. The fastening fixture for valve ball mating grinding according to claim 3, characterized in that: The high-temperature resistant layer (6) includes an aluminum hydroxide coating (61) and a magnesium hydroxide coating (62), and the wear-resistant layer (7) includes a tungsten carbide coating (71) and an aluminum oxide coating (72).

5. The fastening fixture for valve ball mating grinding according to claim 4, characterized in that: The aluminum hydroxide coating (61) is applied to the surface of the mandrel (1), the first pressure sleeve (2), the expansion sleeve (3), the second pressure sleeve (4) and the nut (5), and the magnesium hydroxide coating (62) is applied to the other side of the aluminum hydroxide coating (61).

6. The fastening fixture for valve ball mating grinding according to claim 4, characterized in that: The tungsten carbide coating (71) is applied to the other side of the magnesium hydroxide coating (62), and the aluminum oxide coating (72) is applied to the other side of the tungsten carbide coating (71).

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