High-temperature-resistant ball valve

Abstract

The utility model belongs to the technical field of ball valves, and discloses a high-temperature-resistant ball valve which comprises a valve body, a limiting box arranged at the middle end of the top of the valve body, a valve rod arranged at the bottom end in the limiting box, a valve ball arranged at the middle end in the valve body, a telescopic groove formed in the top end of the valve rod, and a telescopic rod movably connected to the top of the limiting box through a sliding sleeve. A disc is fixedly arranged on the inner top wall of the limiting box, a circle of clamping groove is formed in the bottom of the disc around the telescopic rod, and L-shaped clamping plates are fixedly installed on the two sides of the middle of the telescopic rod. And upward jacking force is applied to the telescopic rod, so that the telescopic rod drives the L-shaped clamping plate to be clamped into the clamping groove, the function of clamping and limiting the telescopic rod is achieved, and the stability of the telescopic rod is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of ball valves, and in particular relates to a high-temperature resistant ball valve. Background Art

[0002] Ball valves are widely used in industries such as oil refining, long-distance pipelines, chemicals, papermaking, pharmaceuticals, water conservancy, electric power, municipal administration, and steel, and play a pivotal role in the national economy. They feature a 90-degree rotational motion, a spherical plug body with a circular through-hole or channel running through its axis. Ball valves are one of the most widely used valves. Their operating principle is similar to that of plug valves, opening and closing the valve by rotating the valve core. However, they are lighter and more compact than plug valves, allowing for large-diameter ball valves. Ball valves offer reliable sealing, a simple structure, and easy maintenance. The sealing surface and ball body are always closed, making them less susceptible to erosion by the medium. Consequently, they are widely used in industries such as petroleum, chemicals, and metallurgy.

[0003] At present, most of the existing high-temperature resistant ball valves do not have the function of limiting the valve stem during use. As a result, when the valve stem at the top of the valve stem is accidentally subjected to external force, it is easy to drive the valve stem and valve ball to rotate, thereby causing the valve ball to open or close. For this reason, we propose a high-temperature resistant ball valve. Utility Model Content

[0004] The purpose of the utility model is to provide a high temperature resistant ball valve to solve the existing problems raised in the above background technology.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a high-temperature resistant ball valve, comprising a valve body, a telescopic rod and an L-shaped clamping plate, a limit box being provided at the top middle end of the valve body, a valve stem being provided at the inner bottom end of the limit box, a valve ball being provided at the inner middle end of the valve body, the valve ball being sealed and slidably connected to the inner wall of the valve body through a sealing sleeve, the bottom end of the valve stem being fixedly connected to the top of the valve ball, a telescopic groove being provided inside the top end of the valve stem, the top of the limit box being movably connected to the telescopic rod through a sliding sleeve, the bottom end of the telescopic rod extending to the inside of the telescopic groove and being limitedly slidably connected to the inner wall thereof, a disc being fixedly provided on the inner top wall of the limit box, the disc being sleeved on the outer circumference of the telescopic rod and movably connected to the same through a bearing, a clamping groove being provided around the telescopic rod at the bottom of the disc, and L-shaped clamping plates being fixedly installed on both sides of the middle portion of the telescopic rod.

[0006] Preferably, limiting grooves are provided on both sides of the interior of the telescopic groove, and limiting blocks are fixedly installed on both sides of one end of the telescopic rod extending to the interior of the telescopic groove. The limiting blocks extend to the interior of the limiting groove and are slidably connected to the inner wall of the telescopic rod. The telescopic rod is slidably connected to the valve stem through the provided limiting groove and the limiting block.

[0007] Preferably, a lifting spring is provided at the inner bottom end of the telescopic slot, and both ends of the lifting spring are fixedly connected to the telescopic rod and the valve stem respectively.

[0008] Preferably, a sealing ring is sleeved on the connection between the bottom end of the valve stem and the limit box, and the sealing ring is sleeved on the outer circumference of the limit box.

[0009] Preferably, a rotating rod is provided on one side of the top of the telescopic rod, and the rotating rod is fixedly connected to the top of the telescopic rod.

[0010] Preferably, the outer periphery of the rotating rod is provided with a heat-insulating sleeve, and the heat-insulating sleeve is provided on the outer periphery of the rotating rod through a sealing rubber sleeve and is fixedly connected thereto.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] 1. By designing the traditional valve stem into a two-end structure and extending the telescopic rod at the upper end to the inside of the lower valve stem, an upward force is applied to the telescopic rod under the action of the lifting spring, so that it drives the L-shaped card to fit into the inside of the card slot, thereby realizing the function of clamping and limiting the telescopic rod to ensure its stability.

[0013] 2. By opening limit grooves on both sides of the telescopic groove, cooperating with the limit block provided at the bottom end of the telescopic rod, the limit grooves and the limit block are used to realize the limited sliding connection between the telescopic rod and the valve stem, so that while realizing the retractability of the telescopic rod, the valve stem can be driven to rotate synchronously through the telescopic rod, thereby realizing the driving of the valve ball and ensuring that the valve ball can be stably opened and closed. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the internal structure of the limit box of the present utility model;

[0016] Figure 3 This is a schematic diagram of the internal cross-sectional structure of the limit box of the present utility model.

[0017] In the figure: 1. Valve body; 2. Limit box; 3. Valve stem; 4. Sealing ring; 5. Valve ball; 6. Telescopic slot; 7. Lifting spring; 8. Limit slot; 9. Telescopic rod; 10. Limit block; 11. L-shaped clamping plate; 12. Disc; 13. Clamping slot; 14. Rotating rod; 15. Insulation sleeve. DETAILED DESCRIPTION

[0018] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] See also Figure 1-3 The utility model provides a technical solution of high temperature resistant ball valve: it includes a valve body 1, a telescopic rod 9 and an L-shaped clamping plate 11. The top middle end of the valve body 1 is provided with a limit box 2, the internal bottom end of the limit box 2 is provided with a valve stem 3, and the internal middle end of the valve body 1 is provided with a valve ball 5. The valve ball 5 is sealed and slidably connected to the inner wall of the valve body 1 through a sealing sleeve. The bottom end of the valve stem 3 is fixedly connected to the top of the valve ball 5. The top of the valve stem 3 is provided with a telescopic slot 6. The top of the limit box 2 is movably connected to the telescopic rod 9 through a sliding sleeve. The bottom end of the telescopic rod 9 extends to the inside of the telescopic slot 6 and is limitedly slidably connected to its inner wall. The internal top wall of the limit box 2 is fixedly provided with a disc 12. The disc 12 is sleeved on the outer circumference of the telescopic rod 9 and is movably connected to it through a bearing. The bottom of the disc 12 is provided with a clamping groove 13 around the telescopic rod 9. L-shaped clamping plates 11 are fixedly installed on both sides of the middle of the telescopic rod 9.

[0020] Specifically, limiting grooves 8 are provided on both sides of the interior of the telescopic groove 6, and limiting blocks 10 are fixedly installed on both sides of one end of the telescopic rod 9 extending to the interior of the telescopic groove 6. The limiting block 10 extends to the interior of the limiting groove 8 and is slidably connected to its inner wall. The telescopic rod 9 is slidably connected to the valve stem 3 through the limiting groove 8 and the limiting block 10.

[0021] Specifically, a lifting spring 7 is provided at the inner bottom end of the telescopic slot 6 , and two ends of the lifting spring 7 are fixedly connected to the telescopic rod 9 and the valve stem 3 respectively.

[0022] Specifically, a sealing ring 4 is sleeved on the connection between the bottom end of the valve stem 3 and the limit box 2 , and the sealing ring 4 is sleeved on the outer periphery of the limit box 2 .

[0023] Specifically, a rotating rod 14 is provided on one side of the top of the telescopic rod 9 , and the rotating rod 14 is fixedly connected to the top of the telescopic rod 9 .

[0024] Specifically, the outer periphery of the rotating rod 14 is provided with a heat insulating sleeve 15 , and the heat insulating sleeve 15 is provided on the outer periphery of the rotating rod 14 through a sealing rubber sleeve and is fixedly connected thereto.

[0025] When the valve ball 5 needs to be opened or closed, the rotating rod 14 can be pressed down to make the rotating rod 14 drive the telescopic rod 9 to move downward, thereby driving the top end of the L-shaped card plate 11 to disengage from the card slot 13 and release the card connection state. Then, the rotating rod 14 is rotated again to drive the telescopic rod 9 to rotate, and the telescopic rod 9 cooperates with the limiting groove 8 and the limiting block 10 to drive the valve stem 3 to rotate, thereby realizing the driving of the valve ball 5. After the adjustment is completed, the rotating rod 14 is released, and the telescopic rod 9 is reset under the action of the lifting spring 7, so that it drives the L-shaped card plate 11 to be stuck in the inside of the card slot 13, realizing the positioning function.

[0026] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high temperature resistant ball valve, comprising a valve body (1), a telescopic rod (9) and an L-shaped clamping plate (11), characterized in that: A limit box (2) is provided at the top middle end of the valve body (1), a valve stem (3) is provided at the inner bottom end of the limit box (2), a valve ball (5) is provided at the inner middle end of the valve body (1), the valve ball (5) is sealed and slidably connected to the inner wall of the valve body (1) through a sealing sleeve, the bottom end of the valve stem (3) is fixedly connected to the top of the valve ball (5), a telescopic groove (6) is provided inside the top end of the valve stem (3), the top of the limit box (2) is movably connected to the telescopic rod (9) through a sliding sleeve, the bottom end of the telescopic rod (9) extends to the inside of the telescopic groove (6) and is limitedly slidably connected to the inner wall thereof, a disc (12) is fixedly provided on the inner top wall of the limit box (2), the disc (12) is sleeved on the outer circumference of the telescopic rod (9), the bottom of the disc (12) is provided with a clamping groove (13) around the telescopic rod (9), and L-shaped clamping plates (11) are fixedly installed on both sides of the middle of the telescopic rod (9).

2. A high temperature resistant ball valve according to claim 1, characterized in that: Limiting grooves (8) are provided on both sides of the interior of the telescopic groove (6); limiting blocks (10) are fixedly installed on both sides of one end of the telescopic rod (9) extending to the interior of the telescopic groove (6); the limiting blocks (10) extend to the interior of the limiting groove (8) and are slidably connected to the inner wall of the limiting groove (8); the telescopic rod (9) is slidably connected to the valve stem (3) through the provided limiting groove (8) and the limiting blocks (10).

3. The high temperature resistant ball valve according to claim 1, characterized in that: A lifting spring (7) is provided at the inner bottom end of the telescopic slot (6), and both ends of the lifting spring (7) are fixedly connected to the telescopic rod (9) and the valve stem (3), respectively.

4. The high temperature resistant ball valve according to claim 1, characterized in that: A sealing ring (4) is sleeved on the connection between the bottom end of the valve stem (3) and the limit box (2), and the sealing ring (4) is sleeved on the outer circumference of the limit box (2).

5. The high temperature resistant ball valve according to claim 1, characterized in that: A rotating rod (14) is provided on one side of the top of the telescopic rod (9), and the rotating rod (14) is fixedly connected to the top of the telescopic rod (9).

6. A high temperature resistant ball valve according to claim 5, characterized in that: The outer periphery of the rotating rod (14) is provided with a heat-insulating sleeve (15), and the heat-insulating sleeve (15) is arranged on the outer periphery of the rotating rod (14) through a sealing rubber sleeve and is fixedly connected thereto.

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