Wear-resistant valve ball

Abstract

The utility model discloses a wear-resistant valve ball which comprises a ball body, a medium channel formed in the ball body and two supporting shafts fixedly arranged on the two opposite sides of the ball body, and the outer surface of the ball body is wrapped with a wear-resistant shell matched with the shape of the outer surface of the ball body. The wear-resistant shell is formed by splicing a plurality of wear-resistant shell pieces, and when the wear-resistant shell pieces are spliced to form the wear-resistant shell, fixing assemblies used for fixing the wear-resistant shell pieces are formed between the wear-resistant shell pieces and the supporting shafts. The utility model has the following advantages and effects: the processing is convenient and fast, and the processing period is short, so that the production efficiency of the ball body is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a valve ball, especially a wear-resistant valve ball. BACKGROUND

[0002] The valve ball is a key component of the valve, usually in the shape of a sphere, and its channel is formed in the middle of the ball. The ball controls the opening and closing of the valve flow passage by rotation, thereby controlling the flow of medium. The ball is usually made of stainless steel, copper, cast iron and other materials, which have good corrosion resistance and mechanical properties. The types of ball include fixed ball, three-way ball, half ball and handle ball, etc.

[0003] The sealing performance of the valve mainly depends on the sealing fit between the ball and the valve seat. Since the hard sealing fit between the two will cause mutual wear between the two components, in order to prolong the service life of the valve, a wear-resistant layer is usually welded on the ball to prolong the service life of the sealing surface of the ball. However, this kind of welding processing method is complicated and has a long processing time, which greatly prolongs the processing cycle of the ball and reduces the production efficiency of the ball. SUMMARY

[0004] The utility model aims to provide a wear-resistant valve ball, which is convenient to process and has a short processing cycle, thereby improving the production efficiency of the ball.

[0005] The above technical purpose of the utility model is achieved by the following technical scheme: a wear-resistant valve ball, comprising a ball body, a medium channel formed in the ball body, and two support shafts fixedly arranged on opposite sides of the ball body, the outer surface of the ball body is covered with a wear-resistant shell which is matched with the shape of the outer surface of the ball body, the wear-resistant shell is assembled by a plurality of wear-resistant shell pieces, and a fixing assembly for fixing each wear-resistant shell piece is formed between each wear-resistant shell piece and the support shaft when the wear-resistant shell pieces are assembled to form the wear-resistant shell.

[0006] By adopting the above technical scheme, the wear-resistant shell pieces are assembled and covered on the outer surface of the ball body to form a wear-resistant shell layer, and then the fixing assembly is arranged to cooperate with the support shaft to fix each wear-resistant shell piece in the assembled state. In this way, the processing of the ball with a wear-resistant layer on the outer surface is completed, the processing of the ball is more convenient and has a short processing cycle, thereby improving the production efficiency of the ball.

[0007] Further provided is that the outer surface of the ball body forms a closed area between the two ends of the medium channel, and the assembly gap of the wear-resistant shell pieces and the closed area are arranged in a staggered manner in the orthographic projection direction.

[0008] By adopting the technical scheme, the assembly gap and the closed area are arranged in a staggered manner to ensure the sealing between the ball and the valve seat in the closed state and avoid leakage.

[0009] Further, when the wear-resistant shell pieces are assembled to form the wear-resistant shell, a positioning assembly for positioning the position of the wear-resistant shell piece is formed between each wear-resistant shell piece and the ball body.

[0010] By adopting the technical scheme, the positioning assembly can realize the pre-positioning of the position of the wear-resistant shell piece during assembly, making the assembly operation more convenient, and better positioning the position of the assembled wear-resistant shell piece, improving the structural stability of the assembled wear-resistant shell piece.

[0011] Further, the fixing assembly includes a fixing portion formed on the wear-resistant shell piece and extending to the outside of the outer peripheral wall of the support shaft, a fixing sleeve sleeved on the outer circle of all the fixing portions on the same support shaft, and a locking structure for locking the fixing sleeve on the fixing portion.

[0012] By adopting the technical scheme, the fixing sleeve is sleeved on the outer circle of all the fixing portions to lock and fix each wear-resistant shell piece on the outer surface of the ball body, and the fixing sleeve is fixed by the cooperatively arranged locking structure, so that the fixing operation of the wear-resistant shell piece on the ball body is completed.

[0013] Further, the locking structure includes a locking ring threadedly connected with the support shaft.

[0014] By adopting the technical scheme, the locking ring is threadedly connected with the support shaft to lock the fixing sleeve.

[0015] Further, the fixing sleeve and the fixing portion form a pressing structure driven by the locking structure to cover the ball body with the wear-resistant shell piece.

[0016] By adopting the technical scheme, the pressing structure is arranged to improve the tightness between the assembled wear-resistant shell pieces and between the wear-resistant shell piece and the ball body, thereby further improving the stability of the assembled structure.

[0017] Further, the pressing structure includes a pressing inclined surface arranged on the inner peripheral wall of the fixing sleeve and gradually flared toward the side of the ball body, and a cooperating inclined surface formed on each fixing portion and cooperating with the pressing inclined surface.

[0018] By adopting the technical scheme, the cooperation of the pressing inclined surface and the cooperating inclined surface changes the direction of the force and realizes tight extrusion, thereby improving the tightness of the assembly.

[0019] Further, the positioning assembly includes a positioning column fixedly arranged on the wear-resistant shell piece and a positioning groove arranged on the ball body and into which the positioning column is inserted.

[0020] By adopting the technical scheme, the positioning column and the positioning groove cooperate to position the installation position of the wear-resistant shell piece.

[0021] To sum up, the utility model has the following beneficial effects: the utility model is convenient to process and has short processing period, thereby improving the production efficiency of the sphere. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a structure schematic view of the embodiment;

[0023] Figure 2 It is a sectional view of the embodiment;

[0024] Figure 3 It is Figure 2 It is an enlarged view of the middle A part;

[0025] Figure 4 It is an explosion view of the embodiment.

[0026] In the drawing: 1, sphere body; 2, medium channel; 3, support shaft; 4, wear-resistant shell piece; 5, fixed assembly; 51, fixed part; 52, fixed sleeve; 53, locking ring; 6, closed area; 7, assembly gap; 8, abutting structure; 81, abutting inclined surface; 82, matching inclined surface; 9, positioning assembly; 91, positioning column; 92, positioning groove. DETAILED DESCRIPTION

[0027] The utility model will be further explained in detail in combination with the drawings.

[0028] Reference Figures 1 to 4 A wear-resistant valve sphere, comprising a sphere body 1, a medium channel 2 arranged on the sphere body 1 and two support shafts 3 integrally arranged on opposite sides of the sphere body 1. The outer surface of the sphere body 1 is covered with a wear-resistant shell matched with the shape of the outer surface of the sphere body 1, and the wear-resistant shell is assembled by a plurality of wear-resistant shell pieces 4, and the number of wear-resistant shell pieces 4 is preferably two. When the wear-resistant shell pieces 4 are assembled to form the wear-resistant shell, the two wear-resistant shell pieces 4 and the two support shafts 3 are formed with a fixed assembly 5 for fixing each wear-resistant shell piece 4.

[0029] The position of the outer surface of the sphere body 1 between the two ends of the medium channel 2 forms a closed area 6, and the assembly gap 7 assembled by the wear-resistant shell pieces 4 is arranged in a staggered manner in the orthographic projection direction with the closed area 6. When the wear-resistant shell pieces 4 are assembled to form the wear-resistant shell, the positioning assembly 9 for positioning the position of the wear-resistant shell piece 4 is formed between each wear-resistant shell piece 4 and the sphere body 1. The positioning assembly 9 comprises a positioning column 91 integrally arranged on the wear-resistant shell piece 4 and a positioning groove 92 arranged on the sphere body 1 and inserted into the positioning column 91. The wear-resistant shell piece 4 is a nickel-based alloy.

[0030] The fixing assembly 5 comprises fixing portions 51 integrally formed on the wear-resistant shell 4 and extending to the outside of the outer wall of the support shaft 3, a fixing sleeve 52 sleeved on the outer circle of all the fixing portions 51 on the same support shaft 3, and a locking structure for locking the fixing sleeve 52 on the fixing portions 51. The locking structure is a locking ring 53 threadedly connected with the support shaft 3.

[0031] The fixing sleeve 52 and the fixing portions 51 form a pressing structure 8 driven by the locking ring 53 to cover the spherical body 1 with the wear-resistant shell 4. The pressing structure 8 comprises a pressing inclined surface 81 formed on the inner wall of the fixing sleeve 52 and gradually flared towards the side of the spherical body 1, and a matching inclined surface 82 formed on each fixing portion 51 and matched with the pressing inclined surface 81.

[0032] The specific embodiment is only an explanation of the utility model, and is not a limitation of the utility model. Those skilled in the art can make modifications to the embodiment without creative contribution after reading the specification, as long as the modifications are within the scope of the claims of the utility model and are protected by the patent law.

Claims

1. A wear-resistant valve ball, comprising a ball body (1), a medium passage (2) formed in the ball body (1), and two support shafts (3) fixedly arranged on opposite sides of the ball body (1), characterized in that: The outer surface of the spherical body (1) is coated with a wear-resistant shell which is matched with the shape of the outer surface of the spherical body (1), the wear-resistant shell is assembled by a plurality of wear-resistant shell pieces (4), and a fixing assembly (5) for fixing each wear-resistant shell piece (4) is formed between each wear-resistant shell piece (4) and each support shaft (3) when the wear-resistant shell pieces (4) are assembled to form the wear-resistant shell.

2. The wear resistant valve ball of claim 1, wherein: The outer surface of the spherical body (1) is located between the two ends of the medium channel (2) to form a closed area (6), and the assembly gap (7) formed by assembling the wear-resistant shell pieces (4) is arranged in a staggered manner in the direction of the orthographic projection with the closed area (6).

3. The wear resistant valve ball of claim 1, wherein: When the wear-resistant shell pieces (4) are assembled to form the wear-resistant shell, a positioning assembly (9) for positioning the position of the wear-resistant shell piece (4) is formed between each wear-resistant shell piece (4) and the spherical body (1).

4. The wear resistant valve ball of claim 1, wherein: The fixing assembly (5) includes a fixing part (51) formed on the wear-resistant shell piece (4) and extending to the outside of the peripheral wall of the support shaft (3), a fixing sleeve (52) sleeved on the outer circle of all fixing parts (51) on the same support shaft (3), and a locking structure for locking the fixing sleeve (52) on the fixing part (51).

5. The wear resistant valve ball of claim 4, wherein: The locking structure includes a locking ring (53) which is threadedly connected with the support shaft (3).

6. The wear resistant valve ball of claim 4, wherein: The fixing sleeve (52) and the fixing part (51) form a abutting structure (8) which is driven by the locking structure to make the wear-resistant shell piece (4) cover the spherical body (1).

7. The wear resistant valve ball of claim 6, wherein: The abutting structure (8) includes an abutting inclined surface (81) provided on the inner peripheral wall of the fixing sleeve (52) and gradually flared towards the side of the spherical body (1), and a matching inclined surface (82) formed on each fixing part (51) and matched with the abutting inclined surface (81).

8. The wear resistant valve ball of claim 3, wherein: The positioning assembly (9) includes a positioning column (91) fixedly provided on the wear-resistant shell piece (4) and a positioning groove (92) provided on the spherical body (1) and inserted by the positioning column (91).

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