Reverse installation prevention structure of ball valve

Abstract

The utility model discloses an anti-reverse-installation structure of a ball valve. The anti-reverse-installation structure comprises a valve body, a valve ball; the valve seat comprises a first contact surface and a second contact surface which have the same structure, and the first contact surface and / or the second contact surface are / is matched with the valve ball; the valve seat is installed in the valve body through a limiting piece. The first contact face and the second contact face which are of the same structure are adopted in the ball valve, when a worker assembles the ball valve, the front face and the back face of the valve seat do not need to be confirmed, each contact face can be matched with the valve ball, and the assembling efficiency of the ball valve is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to ball valve technical field relates to a ball valve anti -reversal structure. BACKGROUND

[0002] Ball valve is a very common technology, often used in petroleum refining, long -distance pipeline, chemical industry, papermaking, pharmaceutical, water conservancy, electric power, municipal, iron and steel industry, for cutting off or connecting medium in pipeline.

[0003] The sealing principle of ball valve is mainly through the valve body inside setting a valve ball, the valve is in the open state, the through -hole in the valve middle and the inlet and outlet of valve seat two ends are led through, form the pipeline. When closing, only need through the valve rod drive valve ball rotation 90 degrees, utilize the valve ball's spherical surface and close the pipeline. The traditional valve seat is installed due to the single contact surface, often appears the worker assembly after finding the valve seat installs reverse phenomenon, leads to re -work situation, seriously influence ball valve assembly efficiency.

[0004] To solve the above problems, the utility model provides a ball valve anti -reversal structure. UTILITY MODEL CONTENTS

[0005] To solve the problems in the background art, the utility model provides a ball valve anti -reversal structure.

[0006] In order to realize the above -mentioned purpose, the utility model adopts the technical scheme as follows: a ball valve anti -reversal structure, including valve body,

[0007] Valve ball,

[0008] Valve seat, including the first contact surface and the second contact surface with same structure, the first contact surface and / or the second contact surface are adapted with the valve ball;The valve seat is installed in the valve body through the limiting piece.

[0009] Further, the limiting piece includes a limiting ring, the limiting ring includes an installation part and a limiting part, the limiting ring is installed on the valve body by cooperating with the installation part through the fastening bolt, and the valve seat is installed in the valve body through the limiting part.

[0010] Further, a first movable gap is arranged between the valve seat and the valve body, and a second movable gap is arranged between the valve seat and the limiting ring.

[0011] Further, a first O-shaped sealing ring is arranged in the first movable gap, and the first O-shaped sealing ring abuts against the valve body and the valve seat.

[0012] Further, a second O-shaped sealing ring is arranged in the second movable gap, and the second O-shaped sealing ring abuts against the valve seat and the limiting ring.

[0013] Further, the valve seat further comprises a first mounting surface and a second mounting surface with the same structure, and the first mounting surface and the second mounting surface are provided with annular grooves for mounting the first O-shaped sealing ring or the second O-shaped sealing ring.

[0014] Further, the mounting portion is provided with mounting holes.

[0015] Compared with the prior art, the utility model has the advantages that: in the utility model, the first contact surface and the second contact surface have the same structure, so that the worker does not need to confirm the front and back surfaces of the valve seat when assembling, and each contact surface can be matched with the valve ball, thereby improving the assembly efficiency of the ball valve. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic view of the utility model;

[0017] Figure 2 is Figure 1 an enlarged view of A part in the utility model;

[0018] Figure 3 is a structural schematic view of the valve ball and the limiting ring in the utility model.

[0019] In the figure: 1, valve body; 2, valve ball; 3, valve seat; 31, first contact surface; 32, second contact surface; 33, first mounting surface; 34, second mounting surface; 35, annular groove; 4, limiting ring; 41, mounting portion; 411, mounting hole; 42, limiting portion; 5, fastening bolt; 6, first O-shaped sealing ring; 7, second O-shaped sealing ring. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, rather than 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 protection scope of the utility model.

[0021] As Figures 1-3 shown, the technical scheme adopted by the utility model is as follows: a ball valve anti-reverse assembly structure, comprising a valve body 1, a valve ball 2 and a valve seat 3, the valve seat 3 and the valve ball 2 are both installed in the valve body 1.

[0022] In the embodiment, the valve seat 3 comprises the first contact surface 31 and the second contact surface 32 with the same structure, and the first contact surface 31 and / or the second contact surface 32 are adapted to the valve ball 2. When the workers assemble, the first contact surface 31 and the second contact surface 32 with the same structure can be adapted to the valve ball 2 without confirming the front and back of the valve seat 3, and the assembly efficiency of the ball valve is improved.

[0023] In the embodiment, the valve seat 3 is installed in the valve body 1 through the limiting piece. The valve body 1 is provided with a design allowance for the close fit of the valve seat 3 and the valve ball 2.

[0024] In the embodiment, the limiting piece comprises the limiting ring 4, the limiting ring 4 comprises the mounting part 41 and the limiting part 42, the limiting ring 4 is installed on the valve body 1 through the fastening bolt 5 cooperating with the mounting part 41, and the valve seat 3 is installed in the valve body 1 through the limiting part 42.

[0025] In the embodiment, the first movable gap is arranged between the valve seat 3 and the valve body 1, and the second movable gap is arranged between the valve seat 3 and the limiting ring 4. The first movable gap and the second movable gap are arranged to ensure the close fit of the valve seat 3 and the valve ball 2.

[0026] In the embodiment, the first O-shaped sealing ring 6 is arranged in the first movable gap, and the first O-shaped sealing ring 6 abuts against the valve body 1 and the valve seat 3 to ensure the sealing between the valve body 1 and the valve seat 3.

[0027] In the embodiment, the second O-shaped sealing ring 7 is arranged in the second movable gap, and the second O-shaped sealing ring 7 abuts against the valve seat 3 and the limiting ring 4 to ensure the sealing between the valve seat 3 and the limiting ring 4.

[0028] In the embodiment, the first O-shaped sealing ring 6 and the second O-shaped sealing ring 7 are double-sealing structures to ensure the sealing of the ball valve, and the first O-shaped sealing ring 6 and the second O-shaped sealing ring 7 provide a fit allowance for the fit of the valve seat 3 and the valve ball 2.

[0029] In the embodiment, the valve seat 3 further comprises the first mounting surface 33 and the second mounting surface 34 with the same structure, and the ring-shaped recess 35 for mounting the first O-shaped sealing ring 6 or the second O-shaped sealing ring 7 is arranged on the first mounting surface 33 and the second mounting surface 34. The ring-shaped recess 35 ensures the accurate mounting of the first O-shaped sealing ring 6 or the second O-shaped sealing ring 7.

[0030] In the embodiment, the mounting hole 411 is arranged on the mounting part 41, and the fastening bolt 5 passes through the mounting hole 411 and fixes the limiting ring 4 on the valve body 1.

[0031] Although the utility model has been explained in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A ball valve anti-reverse installation structure, characterized in that, The utility model relates to a valve seat and valve body assembly, which comprises: a valve body (1); a valve ball (2); a valve seat (3) comprising a first contact surface (31) and a second contact surface (32) with the same structure, the first contact surface (31) and / or the second contact surface (32) being matched with the valve ball (2); the valve seat (3) being installed in the valve body (1) through a limiting part.

2. The anti-installation structure of the ball valve according to claim 1, characterized in that: The limiting part comprises a limiting ring (4) comprising an installation part (41) and a limiting part (42), the limiting ring (4) being matched with the installation part (41) and installed on the valve body (1) through a fastening bolt (5), and the valve seat (3) being installed in the valve body (1) through the limiting part (42).

3. The anti-installation structure of the ball valve according to claim 2, characterized in that: A first movable gap is arranged between the valve seat (3) and the valve body (1), and a second movable gap is arranged between the valve seat (3) and the limiting ring (4).

4. The anti-installation structure of the ball valve according to claim 3, characterized in that: A first O-shaped sealing ring (6) is arranged in the first movable gap, and the first O-shaped sealing ring (6) abuts against the valve body (1) and the valve seat (3).

5. The anti-installation structure of the ball valve according to claim 4, characterized in that: A second O-shaped sealing ring (7) is arranged in the second movable gap, and the second O-shaped sealing ring (7) abuts against the valve seat (3) and the limiting ring (4).

6. The anti-installation structure of the ball valve according to claim 5, characterized in that: The valve seat (3) further comprises a first installation surface (33) and a second installation surface (34) with the same structure, and a ring-shaped recess (35) for installing the first O-shaped sealing ring (6) or the second O-shaped sealing ring (7) is arranged on the first installation surface (33) and the second installation surface (34).

7. The anti-installation structure of the ball valve according to claim 2, characterized in that: An installation hole (411) is arranged on the installation part (41).

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