Straight-through stop valve

Abstract

The utility model discloses a straight-through stop valve which is applied to the field of valve equipment, solves the technical problem that a spherical valve clack in a straight-through stop valve is poor in working stability and reliability, and adopts the technical scheme that the straight-through stop valve comprises a valve part main body, a valve cavity is formed in the middle of the valve part main body, and straight-through pipes are arranged at the two ends of the valve cavity; a valve cavity is formed in the valve part main body, a spherical valve clack block is arranged in the valve cavity, and a rotating handle for driving the spherical valve clack block is arranged on the valve part main body, and is characterized in that an auxiliary external member is arranged between the spherical valve clack block and the valve cavity and comprises a rotating fastening external member and a sealing external member; the rotary fastening suite comprises a limiting supporting rod fixed to the bottom of the spherical valve clack block, an auxiliary fastening cavity formed in the bottom of the valve cavity and a fastening clamping block movably connected to the interior of the auxiliary fastening cavity, and the sealing suite comprises an arc groove formed in the side portion of the spherical valve clack block and an arc clamping block movably connected to the side portion of the valve cavity. The technical effect that the stability of repeated opening and closing use of the valve body can be improved is achieved.

Description

Technical Field

[0001] This utility model relates to the field of valve equipment, and in particular to a straight-through shut-off valve. Background Technology

[0002] Gate valves, also known as stop valves, are one of the most widely used types of valves. Straight-through gate valves are a common type of valve. They rely on the pressure of the valve stem to make the valve disc sealing surface and the valve seat sealing surface tightly fit together, thus preventing the flow of media.

[0003] Chinese Patent Publication No. CN220980376U discloses a straight-through shut-off valve, relating to the field of shut-off valve technology. The valve includes a valve seat body, an opening / closing control unit, and an installation and sealing unit. A horizontal straight-through pipe is connected to both sides of the lower end of the valve seat body. The opening / closing control unit includes a mounting hole, a flow control chamber, a spherical valve disc, a connecting shaft, a screwing block, and a connecting seat. A spherical valve disc is tightly rotatably connected inside the flow control chamber. A circular channel is horizontally opened in the middle of the spherical valve disc, and the diameter and height of the channel are consistent with the straight-through pipe. The installation and sealing unit is installed on the outside of the connecting shaft.

[0004] This gate valve achieves sealing and opening / closing through the cooperation of a spherical valve disc and a flow control chamber. However, during the opening and closing process of this type of valve disc, the valve disc is subjected to a large pressure from the medium passing through it. The operation of opening and closing requires overcoming resistance, which leads to excessive pressure on the connecting shaft. After long-term use, the connecting shaft is prone to local damage, resulting in the inability to guarantee the stability and sealing reliability of the valve body. Utility Model Content

[0005] The purpose of this invention is to provide a straight-through shut-off valve, which has the advantage of improving the stability and reliability of the valve body during repeated opening and closing.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a straight-through shut-off valve includes a valve body, a valve cavity in the middle of the valve body, straight-through pipes at both ends of the valve cavity, a spherical valve disc block inside the valve cavity, a rotating handle for driving the spherical valve disc block on the valve body, an auxiliary assembly between the spherical valve disc block and the valve cavity, the auxiliary assembly including a rotating fastening assembly and a sealing assembly, the rotating fastening assembly including a limiting support rod fixed to the bottom of the spherical valve disc block, an auxiliary fastening cavity at the bottom of the valve cavity, and a movable connection. The auxiliary fastening cavity has a fastening block in the auxiliary fastening cavity. The side of the auxiliary fastening cavity is provided with a guide groove for the fastening block to slide. The limiting support rod is provided with a threaded section. The middle of the fastening block is provided with a threaded locking hole. The fastening block is also provided with a limiting lug. The inner wall of the top of the auxiliary fastening cavity is provided with a limiting insertion hole for the limiting lug to engage. The sealing kit includes an arc groove on the side of the spherical valve disc and an arc-shaped locking block movably connected to the side of the valve cavity. The cavity of the valve cavity is provided with a groove for the arc-shaped locking block to elastically expand and contract and fit. The bottom of the groove is provided with a telescopic compression spring.

[0007] Furthermore, the bottom of both ends of the arc groove is provided with positioning slots.

[0008] Furthermore, the surface of the arc-shaped card block is provided with wear-resistant pads.

[0009] Furthermore, a protective spring is also provided inside the auxiliary fastening cavity, and the protective spring is sleeved on the limiting support rod between the fastening block and the bottom of the auxiliary fastening cavity.

[0010] Furthermore, the bottom of the fastening block is provided with a limiting and correcting groove.

[0011] Furthermore, the bottom of the auxiliary fastening cavity is also provided with a sleeve ring block for the limiting support rod to rotate and engage.

[0012] In summary, this utility model has the following beneficial effects:

[0013] 1. The rotating fastening kit and sealing kit on the ball valve disc can improve the reliability and stability of the valve body during repeated opening and closing. The rotating fastening kit can improve the stress stability of the valve core in the valve body in the locked and normally open states, and improve the reliability of the ball valve disc rotation and working process. The sealing kit can effectively improve the relative sealing state fixation of the ball valve disc after the switching of the open and closed states, further restrict the movement of the valve core, and ensure the sealing stability. Attached Figure Description

[0014] Figure 1 This is a schematic cross-sectional view of a portion of the valve body structure in the embodiment.

[0015] Figure 2This is a schematic diagram used to show the position of the arc groove on the surface of the spherical valve disc;

[0016] Figure 3 This is a schematic diagram used to show the position of the wear-resistant pad in the embodiment.

[0017] Reference numerals in the attached drawings: 1. Valve body; 2. Valve cavity; 3. Straight pipe; 4. Ball valve disc; 5. Rotating handle; 6. Limiting support rod; 61. Auxiliary fastening cavity; 62. Fastening block; 7. Guide vertical groove; 8. Threaded locking hole; 9. Limiting lug; 10. Limiting insertion hole; 11. Arc groove; 12. Arc-shaped locking block; 13. Embedded groove; 14. Telescopic compression spring; 15. Positioning slot; 16. Wear-resistant pad; 17. Protective spring; 18. Limiting and correcting slot; 19. Connecting ring block. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the accompanying drawings.

[0019] Example: A straight-through shut-off valve, such as Figure 1 As shown, the device includes a valve body 1, a valve chamber 2 in the middle of the valve body 1, straight pipes 3 at both ends of the valve chamber 2, and a spherical valve disc 4 inside the valve chamber 2. A rotating handle 5 on the valve body 1 drives the spherical valve disc 4, allowing for adjustment of the opening and closing of the spherical valve disc 4 within the valve chamber 2. An auxiliary assembly is provided between the spherical valve disc 4 and the valve chamber 2, including a rotation fastening assembly and a sealing assembly, which effectively improves the stability and sealing reliability of the spherical valve disc 4 during its opening and closing rotation.

[0020] The rotating fastening assembly includes a limiting support rod 6 fixed to the bottom of the spherical valve disc block 4, an auxiliary fastening cavity 61 located at the bottom of the valve cavity 2, and a fastening block 62 movably connected to the auxiliary fastening cavity 61. The bottom of the auxiliary fastening cavity 61 is also provided with a sleeve ring block 19 for the limiting support rod 6 to rotate and engage. The end of the limiting support rod 6 is rotatably engaged with the sleeve ring block 19. The side of the auxiliary fastening cavity 61 is provided with a guide groove 7 for the fastening block 62 to slide. The limiting support rod 6 has a threaded section, and the fastening block 62 has a threaded locking hole 8 in the middle. That is, as the handle 5 rotates, driving the limiting support rod 6 to rotate, the fastening block 62 can move vertically along the guide groove 7. A limiting lug 9 is also provided on the fastening block 62. The inner wall of the top of the auxiliary fastening cavity 61 is provided with a limiting insertion hole 10 for the limiting lug 9 to engage. After the operator rotates to complete the locking and closing of the ball valve disc 4, the limiting lug 9 remains engaged and locked with the limiting insertion hole 10, which can achieve stable pressure bearing of the ball valve disc 4 under the impact pressure of the conveying medium, and maintain the reliable fastening and closing stability of the ball valve disc 4. In order to further improve the fastening effect of the fastening block 62, a protective spring 17 is also provided in the cavity of the auxiliary fastening cavity 61. The protective spring 17 is sleeved on the limiting support rod 6 between the fastening block 62 and the bottom of the auxiliary fastening cavity 61, so that the protective spring 17 can be synchronously extended and retracted during the vertical adjustment of the fastening block 62, and always maintain continuous pressure on the fastening block 62, which can improve the fastening stability of the fastening block 62 in the closed state of the valve body. The bottom of the fastening block 62 is also provided with a limit correction groove 18, which can reduce the instability of the force caused by excessive deformation of the protective spring 17.

[0021] like Figure 1 and Figure 2 As shown, to improve the tightness of the fit between the spherical valve disc 4 and the valve cavity 2, and to reduce the potential instability in sealing caused by frictional gaps, the sealing kit in the valve body includes an arc groove 11 located on the side of the spherical valve disc 4 and an arc-shaped locking block 12 movably connected to the side of the valve cavity 2. The valve cavity 2 has a groove 13 for the arc-shaped locking block 12 to elastically extend and retract into place. A telescopic spring 14 is located at the bottom of the groove 13. As the spherical valve disc 4 rotates, the arc-shaped locking block 12 maintains elastic compression against the groove wall of the arc groove 11, creating a limiting effect on the opposite side of the spherical valve disc 4. This helps reduce skewed movement during rotation and maintains a consistent fit during rotation. Furthermore, positioning slots 15 are located at the bottom of both ends of the arc groove 11. When the spherical valve disc 4 is rotated to the locked and open positions, the arc-shaped locking block 12 engages with the positioning slots 15, assisting in maintaining the stability of the spherical valve disc 4's position. Meanwhile, with prolonged opening and closing, the surface of the arc-shaped locking block 12 is provided with wear-resistant pads 16 (such as...). Figure 3 As shown in the figure, it can effectively ensure the stable and reliable performance of valves during long-term operation.

[0022] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A straight-through shut-off valve, comprising a valve body (1), a valve cavity (2) in the middle of the valve body (1), straight-through pipes (3) at both ends of the valve cavity (2), a spherical valve disc (4) inside the valve cavity (2), and a rotating handle (5) for driving the spherical valve disc (4) on the valve body (1), characterized in that: An auxiliary assembly is provided between the spherical valve disc (4) and the valve cavity (2), the auxiliary assembly including a rotation fastening assembly and a sealing assembly. The rotating fastening kit includes a limiting support rod (6) fixed to the bottom of the spherical valve disc (4), an auxiliary fastening cavity (61) located at the bottom of the valve cavity (2), and a fastening block (62) movably connected in the auxiliary fastening cavity (61). The side of the auxiliary fastening cavity (61) is provided with a guide groove (7) for the fastening block (62) to slide. The limiting support rod (6) is provided with a threaded section. The fastening block (62) is provided with a threaded locking hole (8) in the middle. The fastening block (62) is also provided with a limiting ear block (9). The inner wall of the top of the auxiliary fastening cavity (61) is provided with a limiting insertion hole (10) for the limiting ear block (9) to engage. The sealing kit includes an arc groove (11) on the side of the spherical valve disc (4) and an arc-shaped locking block (12) movably connected to the side of the valve cavity (2). The valve cavity (2) is provided with a groove (13) for the arc-shaped locking block (12) to elastically extend and retract. The bottom of the groove (13) is provided with a telescopic compression spring (14).

2. A straight-through shut-off valve according to claim 1, characterized in that: The bottom of both ends of the arc groove (11) is provided with positioning slots (15).

3. A straight-through shut-off valve according to claim 2, characterized in that: The surface of the arc-shaped card block (12) is provided with wear-resistant pads (16).

4. A straight-through shut-off valve according to claim 1, characterized in that: The auxiliary fastening cavity (61) is also provided with a protective spring (17), which is sleeved on the limiting support rod (6) between the fastening block (62) and the bottom of the auxiliary fastening cavity (61).

5. A straight-through shut-off valve according to claim 4, characterized in that: The bottom of the fastening block (62) is provided with a limiting and correcting groove (18).

6. A straight-through shut-off valve according to claim 1, characterized in that: The bottom of the auxiliary fastening cavity (61) is also provided with a sleeve ring block (19) for the limiting support rod (6) to rotate and engage.

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