Ball valve

Abstract

The utility model provides a ball valve, and belongs to the technical field of ball valves. The technical problem that the connection sealing performance of an existing ball valve and an external pipe is insufficient is solved. The ball valve comprises a valve body, a valve bonnet, a clamping ring, a gasket and a sealing ring, the valve bonnet is cylindrical and is in threaded connection with a port of the valve body in a matched mode, the sealing ring is embedded in the valve body, the clamping ring is arranged in the valve bonnet, the gasket is arranged between the clamping ring and the sealing ring in an abutting mode, and the sealing ring is arranged between the clamping ring and the sealing ring. The gasket is provided with a conical abutting face with the large end facing the side where the sealing ring is located, and the sealing ring abuts against the abutting face. When loss is generated on the inner edge of the sealing ring, the loss can be compensated under the action of radial inward component force so as to guarantee the sealing performance of the sealing ring and an external pipe, and the sealing performance of the sealing ring is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of ball valve relates to a ball valve. BACKGROUND

[0002] Ball valve is mainly used for cutting off, distribution and changing the flow direction of medium in pipeline, it only needs to rotate 90 degrees and small torque to close tightly, it is generally used as on-off or cut-off valve, its characteristics are small fluid resistance and convenient on-off, when installing ball valve, its port often needs to be inserted and fixed with external pipe.

[0003] The patent with the authorized announcement number CN2447590Y discloses an aluminum-plastic pipe ball valve capable of connecting aluminum-plastic composite pipe, the side of the valve body is a connecting pipe, the connecting pipe is provided with a sealing ring and a clamping ring, the outer end of the connecting pipe is provided with a valve cap, the outer side of the valve cap is engraved with external threads, the inner side of the connecting pipe is engraved with internal threads, the connecting pipe and the valve cap are connected through threads, the outer end of the clamping ring is in contact with the inner end of the valve cap, and the outer end of the clamping ring is a conical inclined surface; a gasket is arranged between the clamping ring and the sealing ring.

[0004] The ball valve product can realize quick fastening of the connecting pipe and guarantee sealing effect, but still has the following problems: the sealing ring is affected by vibration and external force during work, and the inner edge of the sealing ring is worn after long-term use, which leads to a decrease in sealing performance. SUMMARY

[0005] The utility model provides a ball valve in view of the above -mentioned problem of prior art, the technical problems that the utility model wants to solve are: how to improve the connection sealing property of ball valve and external pipe.

[0006] The purpose of the utility model can be realized through the following technical schemes:

[0007] A ball valve, including valve body, valve cap, clamping ring, gasket and sealing ring, the valve cap is cylindrical and is screwed and matched at the port of the valve body, the sealing ring is embedded in the valve body, the clamping ring is arranged in the valve cap, the gasket is arranged between the clamping ring and the sealing ring, and the gasket is characterized by having a large end, and the large end is arranged on the gasket and is arranged on the side of the sealing ring and is arranged as a conical surface, and the sealing ring is in abutment with the abutment surface.

[0008] By setting a conical abutment surface with the larger end facing the sealing ring on the side where the gasket and sealing ring abut, when the valve cap is tightened, the valve cap gradually squeezes the retaining ring and the gasket. The retaining ring, due to its circumferential notch, can radially contract under the guidance of the valve cap or gasket, thus securing the outer pipe to the outer periphery and ensuring a stable connection between the outer pipe and the valve body. At the same time, the gasket can also squeeze the sealing ring, and under the action of the abutment surface, it will also generate a radially inward force towards the sealing ring, thereby making the sealing ring tightly hug the outer periphery of the outer pipe and tightly abut against the valve body. Furthermore, when the inner edge of the sealing ring is worn, the radially inward component force can compensate for the loss to ensure the sealing performance with the outer pipe, further improving the sealing performance.

[0009] In the aforementioned ball valve, the cross-section of the gasket is V-shaped with the opening facing outwards radially. This allows the side of the gasket near the retaining ring to guide the radial contraction of the retaining ring, ensuring smooth tightening of the retaining ring when the valve cap is screwed on. Furthermore, it saves gasket material while still achieving the desired function, facilitating low-cost and lightweight gasket design.

[0010] In the aforementioned ball valve, the cross-section of the retaining ring is U-shaped with the opening facing inward along the radial direction of the retaining ring. This saves on the material cost of the retaining ring while allowing it to contact the outer periphery of the outer pipe through its edges when tightened, reducing the contact area and increasing pressure. This also facilitates the retaining ring partially embedding into the surface of the outer pipe when compressed, greatly increasing the stability of the connection.

[0011] In the ball valve described above, the outer edge of the retaining ring is rounded and abuts against the washer. This helps to reduce the frictional area between the retaining ring and the washer during radial retraction, thus ensuring smooth retraction.

[0012] In the ball valve described above, the valve cap is screwed onto the outer periphery of the valve body port. This allows the operator to use tools such as a wrench to unscrew the valve cap from the outside, preventing misalignment of the force applied during screwing with the screwed part and thus avoiding deformation and damage to the valve cap.

[0013] In the ball valve described above, the inner wall of the valve cap has a circumferentially arranged conical guide surface, with the larger end of the guide surface facing the side where the sealing ring is located. This allows the retaining ring to be guided by the guide surface when the valve cap is tightened, causing both sides of the retaining ring to retract radially inward simultaneously, resulting in a smoother and more reliable connection operation.

[0014] Compared with the prior art, the advantages of this utility model are as follows:

[0015] Under the action of the contact surface, this ball valve will also generate a radial inward force toward the sealing ring. When the inner edge of the sealing ring is damaged, the radial inward component force can compensate for the loss to ensure the sealing performance with the external pipe and improve the sealing performance of the sealing ring. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of this embodiment.

[0017] Figure 2 This is a side view structural diagram of this embodiment.

[0018] Figure 3 yes Figure 2 A schematic diagram of the AA cross-sectional structure.

[0019] Figure 4 yes Figure 3 Enlarged view of part B in the image.

[0020] Figure 5 This is a schematic diagram of the three-dimensional exploded structure of this embodiment.

[0021] Figure 6 This is a three-dimensional exploded structure diagram from another angle in this embodiment.

[0022] In the diagram, 1 is the valve body; 2 is the valve cap; 21 is the guide surface; 3 is the retaining ring; 4 is the gasket; 41 is the abutment surface; and 5 is the sealing ring. Detailed Implementation

[0023] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0024] like Figures 1-6 As shown, this ball valve includes a valve body 1, a valve cap 2, a retaining ring 3, a washer 4, and a sealing ring 5. The valve cap 2 is cylindrical and screwed onto the port of the valve body 1. The sealing ring 5 is embedded inside the valve body 1. The retaining ring 3 is located inside the valve cap 2. The washer 4 is positioned between the retaining ring 3 and the sealing ring 5. The washer 4 has a conical abutment surface 41 with its larger end facing the sealing ring 5. The sealing ring 5 abuts against the abutment surface 41. Further, the cross-section of the washer 4 is V-shaped with the opening radially outward. The cross-section of the retaining ring 3 is U-shaped with the opening radially inward. The outer edge of the retaining ring 3 is rounded and abuts against the washer 4. The valve cap 2 is screwed onto the outer periphery of the port of the valve body 1. The inner wall of the valve cap 2 has a circumferentially arranged conical guide surface 21, with the larger end of the guide surface 21 facing the sealing ring 5.

[0025] The outer pipe passes through the valve cap 2, retaining ring 3, washer 4, and sealing ring 5, and abuts against the valve body 1. Then, the valve cap 2 is tightened, and the valve cap 2 gradually presses the retaining ring 3 and washer 4, and the washer 4 and sealing ring 5 abut against each other, pressing the sealing ring 5 against the valve body 1. At this time, the abutting surface 41 on the washer 4 squeezes the sealing ring 5, so that it is subjected to radial inward force, and it continues to press against the outer periphery of the outer pipe to achieve a seal. At the same time, the two sides of the retaining ring 3 gradually shrink radially inward under the guidance of the guide surface 21 and the side of the washer 4, and then the stirrups achieve connection and seal on the outer periphery of the outer pipe.

[0026] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A ball valve comprising a valve body (1), a bonnet (2), a snap ring (3), a gasket (4) and a seal ring (5), the bonnet (2) being cylindrical and screw fitted to the valve body (1) at a port, the seal ring (5) being embedded in the valve body (1), the snap ring (3) being provided in the bonnet (2), and the gasket (4) being provided against the snap ring (3) and the seal ring (5), characterized in that, The gasket (4) has an abutting surface (41) in the shape of a taper surface on the side facing the sealing ring (5).

2. The ball valve according to claim 1, characterized in that The gasket (4) has a V-shaped cross section with an opening facing outward in the radial direction of the gasket (4).

3. Ball valve according to claim 1 or 2, characterized in that The clamping ring (3) has a U-shaped cross section with an opening facing inward in the radial direction of the clamping ring (3).

4. The ball valve according to claim 3, characterized in that The edges of the clamping ring (3) are rounded and abut against the gasket (4).

5. The ball valve according to claim 1 or 2, characterized in that The bonnet (2) is screwed onto the outer periphery of the valve body (1) at the port.

6. The ball valve according to claim 1 or 2, characterized in that The inner wall of the bonnet (2) has a guide surface (21) in the shape of a taper surface arranged around the circumference, the large end of the guide surface (21) facing the side where the sealing ring (5) is located.

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