Cantonese ball valve

Abstract

The utility model discloses a wide type ball valve which comprises a valve body, a left valve seat and a right valve seat which are arranged in the valve body, a ball body located between the left valve seat and the right valve seat, a cap which is in threaded connection with the valve body and located on the side, opposite to the ball body, of the left valve seat, a valve rod connected with the ball body and a handle connected with the valve rod. A limiting ring fixedly connected with the valve body is arranged on the side, opposite to the ball body, of the right valve seat, an annular adjusting piece is arranged between the right valve seat and the limiting ring and can stretch out and draw back in the direction from the right valve seat to the limiting ring, and a control assembly used for controlling stretching out and drawing back of the adjusting piece is arranged on the outer side of the valve body. The ball valve has the following advantages and effects that the assembly precision between the ball body and the valve rod can be improved, so that the control force of the handle on the ball body is ensured while convenient assembly is realized, and meanwhile, the processing cost of parts is also reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a valve, in particular to a wide style ball valve. BACKGROUND

[0002] The closing piece of the wide style ball valve is a ball, and the ball rotates around the center line of the valve body to achieve opening and closing. The ball valve is mainly used for cutting off, distributing and changing the flow direction of the medium in the pipeline. The wide style ball valve is a new type of valve widely used in recent years, and the valve is generally installed horizontally.

[0003] The existing wide style ball valve generally comprises a valve body, two valve seats installed in the valve body, a ball located between the two valve seats, a nut cap screw-connected with the valve body and located on the side of the ball opposite to the valve seat, a valve rod connected with the ball, and a handle connected with the valve rod. The nut cap is screw-connected with the valve body to fix the valve seat, the ball and the nut cap, so as to limit the horizontal movement of the three. For some enterprises with low machining precision, if the machining error of the parts is large, and the assembly error between the parts is generated during the assembly process, the nut cap will cause a large deviation between the ball and the valve rod during the process of pressing the ball and the valve seat, thereby affecting the subsequent assembly between the valve rod and the ball, and finally affecting the control force of the handle on the ball. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a wide style ball valve, which can improve the assembly precision between the ball and the valve rod, so as to realize convenient assembly, ensure the control force of the handle on the ball, and reduce the machining cost of the parts.

[0005] The above technical purpose of the utility model is realized by the following technical scheme: a wide style ball valve, comprising a valve body, left and right valve seats arranged in the valve body, a ball located between the left and right valve seats, a nut cap screw-connected with the valve body and located on the side of the ball opposite to the left valve seat, a valve rod connected with the ball, and a handle connected with the valve rod, wherein the side of the right valve seat opposite to the ball is provided with a limiting ring fixedly connected with the valve body, an annular adjusting member is arranged between the right valve seat and the limiting ring, the adjusting member can be telescopic in the direction from the right valve seat to the limiting ring, and a control assembly for controlling the telescopic adjusting member is arranged on the outer side of the valve body.

[0006] By adopting the technical scheme, the cap is threadedly connected with the valve body to drive the left valve seat, the ball and the right valve body to move toward the side of the limiting ring and extrude the adjusting member. When the cap is adjusted to the appropriate position, the adjusting member is controlled by the control assembly to compensate for the assembly tolerance of the left valve seat, the ball, the right valve body and the limiting ring, and extrude the right valve seat against the ball to ensure the sealing. In this way, the ball and the valve rod are precisely connected, which facilitates the assembly of the two in the later stage. By adopting the structure, the machining cost of the parts is reduced while the control force of the handle on the ball is ensured.

[0007] Further, the adjusting member is made of elastic material, and the adjusting member has a closed expansion cavity.

[0008] By adopting the technical scheme, the expansion cavity cooperates with the elastic material to give the adjusting member better elastic expansion function.

[0009] Further, the expansion cavity is formed between the adjusting member and the limiting ring.

[0010] By adopting the technical scheme, the expansion cavity is formed by the structure, which is convenient to process and has low cost.

[0011] Further, the adjusting member has a U-shaped cross section with two ends, and the two ends of the adjusting member are provided with a sealing and fixing structure between the two ends and the limiting ring.

[0012] By adopting the technical scheme, the two ends of the adjusting member are fixed to the limiting ring by the fixing structure, so as to form the expansion cavity feature.

[0013] Further, the sealing and fixing structure comprises an outer fixing sleeve provided on the outer circle of the adjusting member and sealingly and fixedly connected with the adjusting member, an inner fixing sleeve provided on the inner circle of the adjusting member and sealingly and fixedly connected with the adjusting member, and a slot formed in the limiting ring and used for sealingly inserting the outer fixing sleeve and the inner fixing sleeve.

[0014] By adopting the technical scheme, the adjusting member is fixed to the inner fixing sleeve and the outer fixing sleeve, and the inner fixing sleeve and the outer fixing sleeve are inserted into the slot in a strong pressing manner to form the sealing assembly of the adjusting member and the limiting ring. The assembly manner compensates for the poor assembly problem caused by the insufficient material strength of the adjusting member, and makes the assembly operation of the adjusting member more convenient.

[0015] Further, the outer fixing sleeve and the valve body, and the inner fixing sleeve and the limiting ring are provided with reinforcing structure points.

[0016] By adopting the technical scheme, the reinforcing structure points further fix the outer fixing sleeve and the inner fixing sleeve, so that the structure is more stable.

[0017] Further, the control assembly comprises a gas supply channel connected with the expansion cavity and an opening and closing member installed on the gas supply channel.

[0018] By the above technical scheme, the elastic member is controlled to extend and retract by the gas flowing into the expansion cavity.

[0019] In conclusion, the utility model has the advantages that the utility model can improve the assembly precision between the ball and the valve rod, so that convenient assembly is realized, the control force of the handle on the ball is ensured, and the machining cost of parts is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structural schematic view of an embodiment;

[0021] Figure 2 It is Figure 1 It is an enlarged view of the A part in the middle.

[0022] In the figure: 1, valve body; 2, left valve seat; 3, right valve seat; 4, ball; 5, cap; 6, valve rod; 7, handle; 8, limiting ring; 9, elastic member; 101, gas supply channel; 102, opening and closing member; 11, expansion cavity; 12, outer fixing sleeve; 13, inner fixing sleeve; 14, insertion slot; 15, reinforcing structure point. DETAILED DESCRIPTION

[0023] The utility model will be further described in detail in combination with the drawings.

[0024] Reference Figure 1 And Figure 2 A Cantonese ball valve, comprising a valve body 1, a left valve seat 2 and a right valve seat 3 arranged in the valve body 1, a ball 4 between the left valve seat 2 and the right valve seat 3, a cap 5 threadedly connected with the valve body 1 and located on the side of the left valve seat 2 opposite to the ball 4, a valve rod 6 connected with the ball 4, and a handle 7 connected with the valve rod 6 and capable of driving the valve rod 6 to rotate. The right valve seat 3 is integrally provided with a limiting ring 8 connected with the valve body 1 on the side opposite to the ball 4, an annular elastic member 9 is arranged between the right valve seat 3 and the limiting ring 8 and capable of extending and retracting from the right valve seat 3 to the limiting ring 8, and a control assembly for controlling the extension and retraction of the elastic member 9 is arranged on the outer side of the valve body 1.

[0025] The elastic member 9 is made of elastic material, specifically rubber, and has a closed expansion cavity 11. The expansion cavity 11 is formed between the elastic member 9 and the limiting ring 8. The cross section of the elastic member 9 is in the shape of U with two ends, and a sealing and fixing structure is arranged between the two ends of the elastic member 9 and the limiting ring 8.

[0026] The sealing fixing structure comprises an outer fixing sleeve 12 arranged on the outer ring of the adjusting member 9 and sealingly and fixedly bonded with the adjusting member 9, an inner fixing sleeve 13 arranged on the inner ring of the adjusting member 9 and sealingly and fixedly bonded with the adjusting member 9, and a slot 14 formed in the limiting ring 8 and used for sealingly inserting the outer fixing sleeve 12 and the inner fixing sleeve 13. The outer fixing sleeve 12 and the inner fixing sleeve 13 are inserted into the slot 14 in a strong pressing manner to form a sealing fit.

[0027] The outer fixing sleeve 12 and the valve body 1 and the inner fixing sleeve 13 and the limiting ring 8 are both provided with reinforcing structure points 15, which are welding points. The control assembly comprises a gas supply channel 101 communicating with the expansion cavity 11 and the outside and an opening and closing member 102 installed on the gas supply channel 101. The gas supply channel 101 is arranged on the valve body 1 and the limiting ring 8, and the opening and closing member 102 is a valve core fixedly installed on the outer end of the gas supply channel 101.

[0028] 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 wide-type ball valve, comprising a valve body (1), a left valve seat (2) and a right valve seat (3) arranged in the valve body (1), a ball (4) between the left valve seat (2) and the right valve seat (3), a nut cap (5) threadedly connected with the valve body (1) and located on the side of the ball (4) away from the left valve seat (2), a valve stem (6) connected with the ball (4), and a handle (7) connected with the valve stem (6), wherein the right valve seat (3) is provided with a limiting ring (8) fixedly connected with the valve body (1) on the side of the ball (4) away from the right valve seat (3). The right valve seat (3) and the limiting ring (8) are provided with an annular adjusting member (9) which can be extended and retracted along the direction from the right valve seat (3) to the limiting ring (8), and a control assembly is arranged outside the valve body (1) for controlling the extension and retraction of the adjusting member (9).

2. The wafer valve of claim 1, wherein: The adjusting member (9) is made of elastic material and has a closed expansion cavity (11).

3. The wafer valve of claim 2, wherein: The expansion cavity (11) is formed between the adjusting member (9) and the limiting ring (8).

4. The wafer valve of claim 3, wherein: The adjusting member (9) has a U-shaped cross section with two ends, and sealing and fixing structures are arranged between the two ends of the adjusting member (9) and the limiting ring (8).

5. The wafer valve of claim 4, wherein: The sealing and fixing structures comprise an outer fixing sleeve (12) arranged on the outer ring of the adjusting member (9) and sealingly and fixedly connected with the adjusting member (9), an inner fixing sleeve (13) arranged on the inner ring of the adjusting member (9) and sealingly and fixedly connected with the adjusting member (9), and an insertion slot (14) formed in the limiting ring (8) and used for sealingly inserting the outer fixing sleeve (12) and the inner fixing sleeve (13).

6. The wafer valve of claim 5, wherein: The outer fixing sleeve (12) and the valve body (1) and the inner fixing sleeve (13) and the limiting ring (8) are provided with reinforcing structure points (15).

7. The wafer valve of claim 1, wherein: The control assembly comprises a gas supply channel (101) which is connected with the expansion cavity (11) and the outside, and an opening and closing member (102) which is installed on the gas supply channel (101).

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