Eccentric C-shaped ball valve structure

Abstract

The utility model relates to the field of ball valve sealing, in particular to an eccentric C-shaped ball valve structure. Comprising a valve body, a valve seat sealing structure, a C-shaped ball body, an upper valve rod, a lower valve rod, a support and a gearbox. The valve body is provided with a valve channel, the C-shaped ball body is arranged in the valve channel, and a ball shaft of the C-shaped ball body and the valve channel of the valve body are eccentrically arranged; a valve seat sealing structure is arranged between the valve channel of the valve body and the C-shaped ball body, the valve seat sealing structure comprises a valve seat, and the valve seat abuts against the C-shaped ball body; the sealing ring, the baffle ring and the valve seat spring are sequentially pressed in a valve channel through the threaded pressing ring and can be placed in the valve channel from the side face of the valve body to be assembled. When the valve is opened, the pressing ring presses the valve seat, and the ball is separated from the valve seat. When the valve is closed, the ball body presses the valve seat to achieve sealing. The problems that in an existing conventional ball valve, under the temperature alternating working condition, leakage risks exist, a valve rod is prone to abrasion, and precision and sealing performance are reduced are solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of ball valve sealing, concretely relates to an eccentric C type ball valve structure. BACKGROUND

[0002] The conventional ball valve generally only has two positions of always opening and always closing, and the half opening is easy to wash the ball and the valve seat. The body cover is connected by bolts, and there is a risk of external leakage under temperature alternating conditions. The torque of the two valve seats is relatively large, and there is a problem of difficult operation, and even it is difficult to complete the opening and closing of the valve. The excessive torque can generate a large stress on the valve rod, and the valve rod is prone to wear, which reduces the precision and sealing performance. The eccentric C type ball valve is mainly applied in the industries of petroleum, chemical industry, papermaking and power, adopts the C type ball structure to reduce the torque, and the ball rotates with the valve rod to achieve the purpose of opening and closing. SUMMARY

[0003] In order to make up for the problems of the prior art, the utility model aims at providing an eccentric C type ball valve structure, which reduces the torque by adopting the C type ball structure, and realizes the purpose of opening and closing by rotating the ball with the valve rod.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] An eccentric C type ball valve structure, comprising a valve body, a valve seat sealing structure, a C type ball, an upper valve rod, a lower valve rod, a support and a gear box.

[0006] The valve body has a valve passage, the C type ball is arranged in the valve passage, and the ball shaft of the C type ball is arranged eccentrically with the valve passage of the valve body. The valve seat sealing structure is arranged between the valve passage of the valve body and the C type ball, the valve seat sealing structure comprises a valve seat, and the valve seat abuts against the C type ball. A threaded compression ring sequentially compresses a sealing ring, a blocking ring and a valve seat spring in the valve passage.

[0007] The ball C type ball is fixedly connected with the lower valve rod through a pin, the lower valve rod is connected with the bottom bearing of the valve body through a lower bearing, and the C type ball is connected with the upper valve rod through a spline.

[0008] The top of the valve body is fixedly connected with the support.

[0009] The top of the upper valve rod is connected with the gear box.

[0010] Further, the upper valve rod is sequentially provided with an upper bearing, a split ring, a packing pad, packing and a pressing sleeve from the connection position with the C-shaped ball to the middle part of the upper valve rod; the upper valve rod is connected with the valve body bearing through the upper bearing; the split ring is used for providing elastic support between the upper valve rod and the valve body; the packing is used for reducing the abrasion between the upper valve rod and the valve body; the packing pad is used for ensuring the effectiveness and uniformity of the packing seal; and the pressing sleeve is used for providing pre-tightening force, pressing the packing and compensating the abrasion between the upper valve rod and the valve body.

[0011] The application has the following beneficial effects:

[0012] The application adopts the whole valve body structure and has no external leakage point; the C-shaped eccentric ball is arranged, so that the flow can be adjusted;

[0013] The C-shaped ball is arranged, the eccentricity is arranged between the ball shaft and the valve body channel, the torque is reduced, the quick opening and closing of the ball and the valve seat can be realized, and the flow can be adjusted through the opening angle;

[0014] The valve seat is fixed in the valve body channel through the threaded pressing ring and is sequentially provided with a valve seat, a sealing ring and a valve seat spring; these parts can be put into assembly from the side of the valve body. When the valve is opened, the pressing ring presses the valve seat, and the ball is separated from the valve seat; when the valve is closed, the ball presses the valve seat to realize sealing. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structural schematic view of the application;

[0016] Figure 2 It is a structural schematic view of the valve seat;

[0017] Figure 3 It is a structural schematic view of the ball and the upper valve rod;

[0018] Figure 4 It is a structural schematic view of the ball and the lower valve rod;

[0019] Figure 5 It is Figure 1 a side view.

[0020] In the drawing: 1. valve body, 2. lower valve rod, 21. pin, 3. lower bearing, 4. retainer ring, 5. valve seat, 6. C-shaped ball, 7. sealing ring, 8. valve seat spring, 9. pressing ring, 10. upper bearing, 11. upper valve rod, 12. split ring, 13. packing pad, 14. packing, 15. pressing sleeve, 16. support, 17. gear box. DETAILED DESCRIPTION

[0021] The present application will be described in detail below with reference to the drawings, but it should be understood that these descriptions are only exemplary, and the specific embodiments described herein are only used to illustrate and explain the present application, and are not intended to limit the scope of the present application. In addition, in the following description, the description of the structure and technical common knowledge is omitted to avoid unnecessary confusion of the concept of the present application.

[0022] Embodiment 1: combined with the Figures 1-5 The present application discloses a structure of eccentric C-type ball valve, comprising a valve body 1, a valve seat sealing structure, a C-type ball 6, an upper valve rod 11, a lower valve rod 2, a bracket 16, a gear box 17;

[0023] The valve body 1 has a valve passage, the C-type ball 6 is arranged in the valve passage, and the ball shaft of the C-type ball 6 is arranged eccentrically with the valve passage of the valve body 1; a valve seat sealing structure is arranged between the valve passage of the valve body 1 and the C-type ball 6, the valve seat sealing structure comprises a valve seat 5, the valve seat 5 abuts against the C-type ball 6; a sealing ring 7, a blocking ring 4 and a valve seat spring 8 are pressed into the valve passage in sequence by a threaded compression ring 9;

[0024] The ball C-type ball 6 is fixedly connected with the lower valve rod 2 through a pin 21; the lower valve rod 2 is connected with the bottom bearing of the valve body 1 through a lower bearing 3; the C-type ball 6 is connected with the upper valve rod 11 through a spline;

[0025] The top of the valve body 1 is fixedly connected with the bracket 16;

[0026] The top of the upper valve rod 11 is connected with the gear box 17.

[0027] Further, the upper valve rod 11 is sequentially provided with an upper bearing 10, a split ring 12, a packing pad 13, a packing 14 and a compression sleeve 15 from the connection position of the upper valve rod 11 and the C-type ball 6 to the middle part of the upper valve rod 11; the upper valve rod 11 is connected with the bearing of the valve body 1 through the upper bearing 10; the split ring 12 is used to provide elastic support between the upper valve rod 11 and the valve body 1; the packing 14 is used to reduce the wear between the upper valve rod 11 and the valve body 1; the packing pad 13 is used to ensure the effectiveness and uniformity of the packing seal; the compression sleeve 15 is used to provide pre-tightening force, compress the packing 14, compensate the wear between the upper valve rod 11 and the valve body 1, and delay the service life.

[0028] The above embodiments are only for illustrating the technical concept and characteristics of the present application, the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit and essence of the present application should be covered within the protection scope of the present application.

Claims

1. An eccentric C-type ball valve structure, characterized in that: It includes a valve body (1), a valve seat sealing structure, a C-shaped ball (6), an upper valve stem (11), a lower valve stem (2), a bracket (16), and a gearbox (17); The valve body (1) has a valve passage, and the C-shaped ball (6) is disposed in the valve passage. The ball shaft of the C-shaped ball (6) is eccentrically disposed with respect to the valve passage of the valve body (1). A valve seat sealing structure is provided between the valve passage of the valve body (1) and the C-shaped ball (6). The valve seat sealing structure includes a valve seat (5), which abuts against the C-shaped ball (6). A threaded pressure ring (9) presses the sealing ring (7), the retaining ring (4), and the valve seat spring (8) into the valve passage in sequence. The C-shaped ball (6) is fixedly connected to the lower valve stem (2) by a pin (21); the lower valve stem (2) is connected to the bottom bearing of the valve body (1) by a lower bearing (3); the C-shaped ball (6) is connected to the upper valve stem (11) by a spline. The top of the valve body (1) is fixedly connected to the bracket (16); The top of the upper valve stem (11) is connected to the gearbox (17).

2. The eccentric C-type ball valve structure according to claim 1, characterized in that: The upper valve stem (11) is provided with an upper bearing (10), a split ring (12), a packing pad (13), a packing (14), and a pressure sleeve (15) in sequence from the connection point with the C-shaped ball (6) to the middle of the upper valve stem (11); the upper valve stem (11) is connected to the valve body (1) bearing through the upper bearing (10); the split ring (12) is used to provide elastic support between the upper valve stem (11) and the valve body (1); the packing (14) is used to reduce wear between the upper valve stem (11) and the valve body (1); the packing pad (13) is used to ensure the effectiveness and uniformity of the packing seal; the pressure sleeve (15) is used to provide preload, press the packing (14), and compensate for wear between the upper valve stem (11) and the valve body (1).

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