Quick-opening stop valve

Abstract

A quick-opening stop valve comprises a valve body, a valve cavity is formed in the lower portion of the valve body, and an inlet and an outlet are formed in the two ends, corresponding to the valve cavity, of the valve body respectively. A valve cover is arranged at the top of the valve body; a cylinder is arranged at the top end of the valve cover; a valve rod penetrates through the valve cover and extends into the valve cavity; the top end of the valve rod is connected with the cylinder; the valve cover is fixedly connected with the valve body through an anti-falling structure; the anti-falling structure comprises a fixed sliding groove, a sliding fixing block and an anti-falling screw. The bottom of the valve deck extends outwards to form a fixing face, the fixing face and the top face of the valve body are correspondingly provided with fixing screw holes, and fixing bolts are screwed into the fixing screw holes. The edge of the fixing face fixing screw hole is outwards provided with a fixing sliding groove, a sliding block is arranged at the bottom of the sliding fixing block, and the sliding block is embedded into the fixing sliding groove and can slide along the fixing sliding groove. The sliding fixing block is provided with a clamping groove corresponding to the outline of the top of the bolt and wraps the top of the bolt, and the top of the bolt abuts against the bottom face of the clamping groove. The clamping groove and the side wall of the top of the bolt are correspondingly provided with an anti-disengaging screw hole, and the anti-disengaging screw is screwed into the anti-disengaging screw hole.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a quick-opening stop valve. Background Art

[0002] Pneumatic stop valve uses cylinder as driving element, which is used as control component to cut off, distribute and change the flow direction of medium. It is widely used in pipeline system nowadays because of its advantages such as easy maintenance, long opening and closing time and good sealing.

[0003] The pneumatic quick-opening stop valve in the prior art has no other bolt anti-loosening settings except the gasket. The valve cover and the valve body are fixedly connected with bolts and nuts. However, after long-term use, due to factors such as vibration, the threads between the bolts and nuts are prone to loosening, which in turn affects the firmness and stability of the installation between the valve cover and the valve body. Summary of the invention

[0004] In order to solve the above problems, the utility model provides the following solutions:

[0005] A quick-opening stop valve comprises a valve body, a valve cavity is arranged at the lower part of the valve body, and an inlet and an outlet are respectively arranged at two ends of the valve body corresponding to the valve cavity; a valve seat is arranged in the valve body, a valve cover is arranged on the top of the valve body, a cylinder is arranged on the top of the valve cover, a valve stem passes through the valve cover and extends into the valve cavity, the top of the valve stem is connected with the cylinder, and a valve core is arranged at the bottom of the valve stem; the valve cover and the valve body are fixedly connected by an anti-slip structure; the anti-slip structure comprises a fixed slide groove, a sliding fixing block and an anti-slip screw; a fixing surface is extended outwardly at the bottom of the valve cover, and a fixing screw hole is arranged corresponding to the fixing surface and the top surface of the valve body, and the fixing bolt is screwed into the fixing screw hole; a fixing slide groove is arranged outwardly on the edge of the fixing screw hole of the fixing surface, and a sliding block is arranged at the bottom of the sliding fixing block, the sliding block is embedded in the fixing slide groove and can slide along the fixing slide groove; a slot is arranged on the sliding fixing block corresponding to the top contour of the bolt, the sliding fixing block wraps the top of the bolt and the top of the bolt is against the bottom surface of the slot; anti-slip screw holes are arranged corresponding to the slot and the side wall of the top of the bolt, and the anti-slip screw is screwed into the anti-slip screw hole.

[0006] Furthermore, an embedded block extends downward from the bottom of the valve core corresponding to the center of the valve seat, and sealing rings are arranged between the edge of the embedded block and the valve seat and between the edge of the bottom surface of the valve core and the top surface of the valve seat.

[0007] Furthermore, the valve cavity from the inlet to the valve seat is arranged in an ascending shape, and the outlet center line and the bottom surface of the valve seat are located in the same plane.

[0008] Furthermore, a valve body slot is provided downwardly from the center of the top of the valve body, and a valve cover block is provided on the valve cover corresponding to the valve body slot. When the valve cover is connected to the valve body, the valve cover block is embedded in the valve body slot.

[0009] Furthermore, a valve stem sealing ring installation groove is provided in the valve body slot, a valve stem sealing ring is sleeved on the valve stem corresponding to the valve body slot position, the valve stem sealing ring is arranged in the valve stem sealing ring installation groove, and the thickness of the valve stem sealing ring is greater than the valve stem sealing ring installation groove.

[0010] Furthermore, the anti-slip screw is a countersunk screw

[0011] The beneficial effects of the utility model are:

[0012] The anti-slipping screw in the anti-slipping structure fixes the fixing bolt axially to prevent the fixing bolt from being sloughed out due to slight rotation caused by vibration when the stop valve is running. The bottom surface of the slot of the sliding fixing block can act as a gasket to protect the valve body and increase the firmness of the fixing bolt. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 It is a schematic diagram of the anti-slip structure;

[0015] Figure 3 Schematic diagram of the connection between the valve core and the valve seat.

[0016] 1. Valve body; 2. Valve cover; 3. Anti-slip structure; 4. Inlet; 5. Outlet; 6. Valve seat; 7. Valve stem; 8. Valve core; 9. Cylinder; 10. Fixing bolt; 11. Sliding fixed block; 12. Fixed slide groove; 13. Sliding block; 14. Anti-slip screw; 15. Embedded block; 16. Sealing ring; 17. Valve body slot; 18. Valve cover block; 19. Valve stem sealing ring. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantages of the present application clearer, the present invention is further described in detail below in conjunction with the embodiments. In order to thoroughly understand the present invention, some specific details will be involved in the following description. In the absence of these specific details, the invention of the present invention can still be realized, that is, the description and statement herein can more effectively introduce the nature of their work to other technicians in the field. In addition, it should be noted that it should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the actual protection scope. All raw materials used in the following examples are commercially available products.

[0018] Example 1: Figure 1-Figure 3As shown, a quick-opening stop valve comprises a valve body 1, a valve cavity is arranged at the lower part of the valve body 1, an inlet 4 and an outlet 5 are arranged at the two ends of the valve cavity of the valve body 1 respectively; a valve seat 6 is arranged in the valve body 1, a valve cover 2 is arranged on the top of the valve body 1, a cylinder 9 is arranged on the top of the valve cover 2, a valve stem 7 passes through the valve cover 2 and extends into the valve cavity, the top of the valve stem 7 is connected to the cylinder 9, and a valve core 8 is arranged on the bottom of the valve stem 7; the valve cover 2 is fixedly connected to the valve body 1 by an anti-slip structure 3; the anti-slip structure 3 comprises a fixed slide groove 12, a sliding fixed block 11 and an anti-slip screw 14; a fixing surface is extended outward from the bottom of the valve cover 2, A fixing screw hole is provided corresponding to the fixing surface and the top surface of the valve body 1, and the fixing bolt 10 is screwed into the fixing screw hole; a fixing groove 12 is provided outwardly at the edge of the fixing screw hole of the fixing surface, and a slider 13 is provided at the bottom of the sliding fixing block 11, and the slider 13 is embedded in the fixing groove 12 and can slide along the fixing groove 12; a slot is provided in the sliding fixing block 11 corresponding to the top contour of the fixing bolt 10, and the sliding fixing block 11 wraps the top of the fixing bolt 10 and the top of the fixing bolt 10 is against the bottom surface of the slot; anti-slip screw holes are provided corresponding to the side walls of the slot and the top of the fixing bolt 10, and the anti-slip screw 14 is screwed into the anti-slip screw hole.

[0019] An embedded block 15 extends downward from the bottom of the valve core 8 corresponding to the center of the valve seat 6, and a sealing ring 16 is arranged between the edge of the embedded block 15 and the valve seat 1, and between the edge of the bottom surface of the valve core 8 and the top surface of the valve seat 6. The valve cavity from the inlet 4 to the valve seat 6 is arranged in an ascending shape, and the center line of the outlet 5 and the bottom surface of the valve seat 6 are located in the same plane.

[0020] The valve body 1 has a valve body slot 17 downwardly provided at the center of the top of the valve body 1, and the valve cover 2 is provided with a valve cover block 18 corresponding to the valve body slot 17. When the valve cover 2 is connected to the valve body 1, the valve cover block 18 is embedded in the valve body slot 17. A valve stem sealing ring installation groove is provided in the valve body slot 17, and a valve stem sealing ring 19 is sleeved at the position of the valve stem 7 corresponding to the valve body slot 17. The valve stem sealing ring 19 is provided in the valve stem sealing ring installation groove, and the thickness of the valve stem sealing ring 19 is greater than the valve stem sealing ring installation groove.

[0021] When the valve cover 2 is installed with the valve body 1, first partially screw the fixing bolt 10 into the fixing screw hole, then move the sliding fixing block 11 along the fixing slide groove 12 toward the fixing bolt 10 until the bottom surface of the slot moves below the top of the fixing bolt 10, and the top of the fixing bolt 10 can still rotate in the slot. At this time, continue to screw in the fixing bolt 10 to tighten the fixing bolt 10, and finally screw the anti-slip screw 14 into the anti-slip screw hole to complete the fixing of the anti-slip structure 3 and the connection between the valve body 1 and the valve cover 2.

[0022] The anti-slipping screw 14 in the anti-slipping structure 3 of the utility model fixes the fixing bolt 10 axially to prevent the fixing bolt 10 from slipping out due to slight rotation caused by vibration when the stop valve is in operation, and the bottom surface of the slot of the sliding fixing block 11 can act as a gasket to protect the valve body 1 and increase the firmness of the fixing bolt 10 being screwed in.

[0023] Finally, it should be noted that the above examples are only specific embodiments of the present invention. Obviously, the present invention is not limited to the above examples, and there are many variations. All variations that can be directly derived or associated with the content disclosed by a person skilled in the art from the present invention should be considered as the protection scope of the present invention.

Claims

1. A quick-opening stop valve, characterized in that: The closure of the valve body is provided with a valve cavity at the bottom of the valve body, and an inlet and an outlet are respectively provided at two ends of the valve cavity corresponding to the valve body; a valve seat is provided in the valve body, a valve cover is provided on the top of the valve body, a cylinder is provided on the top of the valve cover, a valve stem passes through the valve cover and extends into the valve cavity, the top of the valve stem is connected with the cylinder, and a valve core is provided at the bottom of the valve stem; the valve cover and the valve body are fixedly connected by an anti-slip structure; the anti-slip structure includes a fixed slide groove, a sliding fixed block and an anti-slip screw; a fixed surface is extended outward from the bottom of the valve cover, and a fixed screw hole is provided on the fixed surface corresponding to the top surface of the valve body, and the fixing bolt is screwed into the fixed screw hole; a fixed slide groove is provided outwardly from the edge of the fixed screw hole of the fixing surface, and a sliding block is provided at the bottom of the sliding fixed block, the sliding block is embedded in the fixed slide groove and can slide along the fixed slide groove; a slot is provided on the sliding fixed block corresponding to the top contour of the bolt, the sliding fixed block wraps the top of the bolt and the top of the bolt is against the bottom surface of the slot; anti-slip screw holes are provided on the side wall of the slot and the top of the bolt, and the anti-slip screw is screwed into the anti-slip screw hole.

2. A quick-opening stop valve as claimed in claim 1, characterized in that: An embedded block is extended downwardly from the bottom of the valve core corresponding to the center of the valve seat, and sealing rings are arranged between the edge of the embedded block and the valve seat and between the edge of the bottom surface of the valve core and the top surface of the valve seat.

3. A quick-opening stop valve as claimed in claim 1, characterized in that: The valve cavity from the inlet to the valve seat is arranged in an ascending shape, and the outlet center line and the bottom surface of the valve seat are located in the same plane.

4. A quick-opening stop valve as claimed in claim 1, characterized in that: A valve body slot is downwardly provided at the center of the top of the valve body, and a valve cover block is provided on the valve cover corresponding to the valve body slot. When the valve cover is connected to the valve body, the valve cover block is embedded in the valve body slot.

5. A quick-opening stop valve as claimed in claim 4, characterized in that: A valve stem sealing ring installation groove is arranged in the valve body slot, a valve stem sealing ring is sleeved on the valve stem corresponding to the valve body slot position, the valve stem sealing ring is arranged in the valve stem sealing ring installation groove, and the thickness of the valve stem sealing ring is greater than the valve stem sealing ring installation groove.

6. A quick-opening stop valve as claimed in claim 1, characterized in that: The anti-drop screw is a countersunk screw.

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