Sealing structure for valve body and valve core of ball valve

Abstract

The utility model discloses a sealing structure for a valve body and a valve core of a ball valve, which relates to the technical field of valves and is characterized by comprising the valve body, valve covers arranged on two sides of the valve body, a valve column arranged on the valve body, a rotatable valve rod arranged in the valve column and used for opening and closing the valve, and the valve core arranged at the bottom end of the valve rod. Supporting pieces are arranged in transverse cracks between the valve body and the valve covers on the two sides, sealing pieces are arranged between the supporting pieces and the valve element, and the contact faces of the sealing pieces and the valve element are arc faces, so that the effect is that the inner walls of the valve covers can be squeezed towards the axis positions of the supporting pieces, the protruding ends of the supporting pieces are compressed downwards, and elastic acting force towards the valve element is provided for the sealing pieces; the sealing piece can extrude the valve element under the elastic action of the supporting piece, so that the good sealing effect is achieved, the supporting piece is in the continuously-folded S shape, the use space of the sealing structure in the valve body is saved, the supporting piece is fixed through the ball valve extrusion forming technology, and the efficient sealing effect of the short ball valve is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, and more particularly to a sealing structure of a ball valve body and a valve core. Background Art

[0002] A ball valve is a valve that uses a spherical or hemispherical switching element to control fluid flow. It opens or closes the fluid passageway by rotating the ball. The development of ball valves has evolved from simple to complex, from a single material to multiple materials, and from low performance to high performance. With the emergence of polymer synthetic materials, ball valve seats have begun to be made of soft materials such as polytetrafluoroethylene, rubber, and nylon, which has promoted the industrialization and use of soft-seat ball valves.

[0003] In the existing ball valve structure, for the short ball valve of the heating unit, the short ball valve shortens the valve tubes on both sides of the valve body to save the length of the ball valve itself, so that it can achieve the function of controlling the fluid medium in a smaller space. However, in actual use, due to the structural characteristics of the short ball valve itself, the space between the valve core and the valve body is small, resulting in a smaller space reserved for sealing materials. The existing sealing structure has a small volume in such a small space, and the long-term contact and friction between the valve core and the seal causes material friction loss, which easily reduces the sealing between the valve core and the sealing material, affecting the service life of the ball valve. At the same time, regular inspection, maintenance and replacement of the sealing structure are required to ensure the normal use of the valve.

[0004] Therefore, in order to solve the above technical problems, the present application proposes a sealing structure for a ball valve body and a valve core. Utility Model Content

[0005] In view of the deficiencies in the prior art, the present invention aims to provide a sealing structure for a ball valve body and a valve core.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a sealing structure for a ball valve body and a valve core, comprising a valve body, valve covers on both sides of the valve body, a valve column on the valve body, a rotatable valve stem for opening and closing the valve inside the valve column, a valve core installed at the bottom end of the valve stem, a support member provided in the transverse gap between the valve body and the valve covers on both sides, a sealing member provided between the support member and the valve core, and a contact surface between the sealing member and the valve core being an arc surface.

[0007] Preferably, the contact ends of the valve body and the valve cover are extrusion ends, and the valve body and the valve covers on both sides thereof are extrusion-connected.

[0008] Preferably, the cross-section of the support member is in a continuously folded shape, the lower end of the support member is in a folded S shape, and the upper end of the support member is a convex end.

[0009] Preferably, a cavity is provided on the side of the protruding end, and the cavity is used to prevent the protruding end from being rigidly broken due to the extrusion force when the protruding end is deformed by the extrusion force from top to bottom of the valve cover.

[0010] Preferably, a plurality of mounting holes are provided in a circumferential array on the valve cover, and the valve covers on both sides of the valve body are connected to their respective mounting holes by pins.

[0011] Preferably, the folded portion at the bottom end of the support member is connected to the sealing member, and a number of telescopic springs are provided at the folded portions adjacent to the bottom end of the support member. The ends of the telescopic springs are each equipped with a support seat that directly contacts the isolation spring and the support member, and the support seat is fixedly connected to the support member.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. In the utility model, when the valve body and the valve cover are squeezed, the inner wall of the valve cover will be squeezed toward the axis of the support member, so that the raised end of the support member is compressed downward to provide an elastic force for the seal member toward the valve core. Under the elastic action of the support member, the seal member will squeeze the valve core, thereby achieving a good sealing effect. The support member is in a continuously folded S shape, which saves the use space of the sealing structure inside the valve body. The extrusion molding process of the ball valve also enables the support member to be fixed, thereby achieving an efficient sealing effect of the short ball valve.

[0014] 2. In the present invention, after a long period of contact and friction between the valve core and the seal, a portion of the edge of the seal is worn away. The telescopic elastic force of the telescopic spring assists the support member, so that the elastic plastic support member, which originally has reduced elasticity due to a long period of time, can still provide a large elastic force for the seal, so that the edge of the seal always fits the valve core, thereby ensuring the service life of the ball valve, reducing the frequency of replacing the sealing structure, and saving the use cost of the ball valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a cross-sectional schematic diagram of the interior of the utility model;

[0018] Figure 3 for Figure 2 A magnified schematic diagram of point A in the middle;

[0019] Figure 4 This is a schematic structural diagram of the second embodiment of the present utility model;

[0020] Figure 5 for Figure 4 Enlarged schematic diagram of point B in the middle.

[0021] 1. Valve body; 101. Extrusion end; 2. Valve cover; 3. Mounting hole; 4. Orifice pin; 5. Valve column; 6. Valve stem; 7. Valve core; 8. Support member; 801. Raised end; 802. Cavity; 9. Seal; 10. Support seat; 11. Telescopic spring. DETAILED DESCRIPTION Example

[0022] like Figure 1-5 As shown, the utility model provides a sealing structure of a ball valve body 1 and a valve core 7, comprising a valve body 1, with valve covers 2 provided on both sides of the valve body 1, the contact ends of the valve body 1 and the valve covers 2 being extrusion ends 101, and the valve body 1 and the valve covers 2 on both sides thereof are extrusion-connected;

[0023] It should be noted that when the short ball valve is produced, the valve covers 2 on both sides of the valve body 1 together with the top of the raised end 801 of the support member 8 are clamped on the extrusion end 101 of the valve body 1, and are extruded and shaped by an external device that can apply mechanical force, such as an extruder, so that the valve covers 2 on both sides of the valve body 1 are fixed;

[0024] A support member 8 is provided in the transverse gap between the valve body 1 and the valve covers 2 on both sides, a sealing member 9 is provided between the support member 8 and the valve core 7, the folded bottom end of the support member 8 is connected to the sealing member 9, the contact surface between the sealing member 9 and the valve core 7 is an arc surface, the cross-section of the support member 8 is a continuous folded shape, the lower end of the support member 8 is a folded S-shape, the upper end of the support member 8 is a raised end 801, and a cavity 802 is provided on the side of the raised end 801. The cavity 802 is used to prevent the raised end 801 from being rigidly broken due to the extrusion force when the raised end 801 is subjected to the extrusion force from top to bottom of the valve cover 2 and is deformed.

[0025] like Figure 2 、 Figure 3 As shown, the support member 8 can be made of elastic metal. Elastic metal usually has good hardness and compressive strength, can withstand large loads, and the elastic metal has high toughness, which can provide elastic force for the seal 9 for a long time. When the valve body 1 and the valve cover 2 are squeezed, the inner wall of the valve cover 2 will be squeezed toward the axis of the support member 8, so that the raised end 801 of the support member 8 is compressed downward to provide the seal 9 with an elastic force toward the valve core 7. Under the elastic action of the support member 8, the seal 9 will squeeze the valve core 7, thereby achieving a better sealing effect. The support member 8 is in a continuously folded S shape, which saves the use space of the internal sealing structure of the valve body 1. The extrusion molding process of the ball valve also enables the support member 8 to be fixed, thereby achieving an efficient sealing effect of the short ball valve.

[0026] The valve body 1 is provided with a valve column 5, within which is a rotatable valve stem 6 for opening and closing the valve. A valve core 7 is mounted at the bottom end of the valve stem 6. A plurality of mounting holes 3 are formed in a circumferential array on the valve cover 2. The valve covers 2 on both sides of the valve body 1 are connected to their respective mounting holes 3 via orifice pins 4.

[0027] The staff rotates the valve stem 6, thereby driving the valve core 7 to rotate. The rotation of the valve core 7 controls the opening and closing of the valve as a whole for the fluid medium. The installation hole 3 and the hole pin 4 can further reduce the installation space of the short ball valve, thereby reducing the space occupancy rate of the short ball valve. Example

[0028] like Figure 1-5 As shown, the utility model provides a sealing structure of a ball valve body 1 and a valve core 7, including a plurality of telescopic springs 11 provided at the folded portion adjacent to the bottom end of the support member 8, and the ends of the telescopic springs 11 are each installed with a support seat 10 that is in direct contact with the support member 8 through which the isolation spring is located, and the support seat 10 is fixedly connected to the support member 8.

[0029] It should be noted that the support member 8 can be made of elastic plastic. The hardness and toughness of elastic plastic are usually lower than those of elastic metal. The elastic force of elastic plastic will weaken over time. However, its weight and cost are lower than those of elastic metal. It is suitable for small heating units that require more flexible use.

[0030] like Figure 4 、 Figure 5 As shown, after a long period of contact and friction between the valve core 7 and the sealing member 9, a portion of the edge of the sealing member 9 is worn away, and the telescopic elastic force of the telescopic spring 11 assists the support member 8, so that the elastic plastic support member 8, which originally had its elasticity reduced due to a long time, can still provide a large elastic force for the sealing member 9, so that the edge of the sealing member 9 always fits the valve core 7, thereby ensuring the service life of the ball valve, reducing the frequency of replacing the sealing structure, and saving the use cost of the ball valve.

[0031] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Any ordinary technician in this industry can smoothly implement the present invention as shown in the drawings and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with this profession without departing from the scope of the technical solution of the present invention using the technical content disclosed above are all equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the scope of protection of the technical solution of the present invention.

Claims

1. A sealing structure for a ball valve body and a valve core, comprising a valve body (1), characterized in that: Valve covers (2) are provided on both sides of the valve body (1), a valve column (5) is provided on the valve body (1), a rotatable valve stem (6) for opening and closing the valve is provided inside the valve column (5), a valve core (7) is installed at the bottom end of the valve stem (6), a support member (8) is provided in the transverse gap between the valve body (1) and the valve covers (2) on both sides, a sealing member (9) is provided between the support member (8) and the valve core (7), and the contact surface between the sealing member (9) and the valve core (7) is an arc surface; The cross-section of the support member (8) is in a continuously folded shape, the lower end of the support member (8) is in a folded S-shape, and the upper end of the support member (8) is a raised end (801).

2. The sealing structure of a ball valve body and a valve core according to claim 1, characterized in that: The contact ends of the valve body (1) and the valve cover (2) are extrusion ends (101), and the valve body (1) and the valve covers (2) on both sides thereof are all extrusion-connected.

3. The sealing structure of a ball valve body and a valve core according to claim 1, characterized in that: A cavity (802) is provided on the side of the raised end (801), and the cavity (802) is used to prevent the raised end (801) from being rigidly broken due to the extrusion force when the raised end (801) is deformed by the extrusion force from the valve cover (2) from top to bottom.

4. The sealing structure of a ball valve body and a valve core according to claim 1, characterized in that: A plurality of mounting holes (3) are provided in a circumferential array on the valve cover (2), and the valve covers (2) on both sides of the valve body (1) are connected to their respective mounting holes (3) via hole pins (4).

5. The sealing structure of a ball valve body and a valve core according to claim 3, characterized in that: The folded portion at the bottom end of the support member (8) is connected to the sealing member (9), and a plurality of telescopic springs (11) are provided at the folded portion adjacent to the bottom end of the support member (8). The ends of the telescopic springs (11) are all provided with support seats (10) that are in direct contact with the barrier spring and the support member (8), and the support seat (10) is fixedly connected to the support member (8).

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