Manual flat valve

Abstract

The utility model discloses a manual flat valve which comprises a valve seat and a valve rod, a valve cover is fixedly arranged at the top of the valve seat, a connecting vertical rod is fixedly arranged at the top of the valve cover, a top plate is fixedly arranged at the upper end of the connecting vertical rod, a bottom plate is fixedly arranged at the lower end of the connecting vertical rod, a rapid moving gap is reserved between the top plate and the bottom plate, and through holes are formed in the centers of the top plate and the bottom plate. The valve rod is arranged in the through hole in a penetrating mode, the valve rod is fixedly sleeved with an external thread cylinder, the external thread cylinder is located in the rapid moving gap, an upper screw hole matched with the external thread cylinder is formed in the bottom face of the top plate, and a lower screw hole matched with the external thread cylinder is formed in the top face of the bottom plate. According to the manual flat valve, the external thread cylinder rapidly moves up and down in the rapid movement gap, so that the valve rod drives the valve plate to move, and the function of rapidly opening and closing the flat valve is achieved.

Description

Technical Field

[0001] The utility model relates to a manual flat valve. Background Art

[0002] Manual flat valves are mainly used in pipelines for transporting natural gas, petroleum, chemicals, environmental protection, urban pipelines, gas pipelines, etc., and in gas storage devices, as opening and closing equipment.

[0003] Based on the above, the inventor found the following problems: when opening and closing a manual flat valve, since the thread on the surface of the valve stem is relatively long, it is necessary to continuously rotate the valve stem to move the valve plate closer to or away from the valve seat. In some special cases, it is necessary to quickly open or close the flat valve, while traditional flat valves do not have the function of quickly opening and closing. Summary of the Invention

[0004] The purpose of the utility model is to provide a manual flat valve, which includes a valve seat and a valve stem. A valve cover is fixedly arranged on the top of the valve seat, a connecting vertical rod is fixedly arranged on the top of the valve cover, a top plate is fixedly arranged at the upper end of the connecting vertical rod, a bottom plate is fixedly arranged at the lower end of the connecting vertical rod, a quick movement gap is left between the top plate and the bottom plate, through holes are arranged at the centers of the top plate and the bottom plate, the valve stem passes through the through holes, an external thread cylinder is fixedly sleeved on the valve stem, the external thread cylinder is located in the quick movement gap, an upper screw hole matching with the external thread cylinder is arranged on the bottom surface of the top plate, and a lower screw hole matching with the external thread cylinder is arranged on the top surface of the bottom plate.

[0005] Preferably, a connecting T-block is arranged at the lower end of the valve stem, the connecting T-block is rotatably connected with a valve plate, the valve plate is located inside the valve seat, and the distance of the quick movement gap is equal to the opening and closing movement distance of the valve plate.

[0006] Preferably, an adjusting handwheel is arranged at the upper end of the valve stem, and anti-slip lines are arranged on the surface of the adjusting handwheel.

[0007] Preferably, a sealing ring is arranged at the penetration part of the valve stem and the valve cover.

[0008] Preferably, the centers of the valve stem, the through hole, the external thread cylinder, the upper screw hole and the lower screw hole are on the same central axis.

[0009] The advantages and beneficial effects of the utility model are as follows: a manual flat valve is provided. By arranging a quick movement gap between the top plate and the bottom plate, when the external thread cylinder of the valve stem is disengaged from the upper screw hole or the lower screw hole, the external thread cylinder can quickly move up and down in the quick movement gap, so that the valve stem drives the valve plate to quickly move up and down, thereby realizing the function of quickly opening and closing the flat valve. Brief Description of the Drawings

[0010] Figure 1 It is a schematic diagram of the utility model. Specific Embodiments

[0011] The following combines the accompanying drawings and embodiments to further describe the specific embodiments of the present utility model. The following embodiments are only used to more clearly illustrate the technical solution of the present utility model and cannot be used to limit the protection scope of the present utility model.

[0012] The technical solution specifically implemented by the present utility model is as follows:

[0013] As Figure 1 shown, a manual flat valve includes a valve seat 1 and a valve stem 2. A valve cover 3 is fixedly provided at the top of the valve seat 1. A connecting vertical rod 4 is fixedly provided at the top of the valve cover 3. A top plate 5 is fixedly provided at the upper end of the connecting vertical rod 4. A bottom plate 6 is fixedly provided at the lower end of the connecting vertical rod 4. A rapid movement gap 7 is left between the top plate 5 and the bottom plate 6. Through holes 8 are provided at the centers of the top plate 5 and the bottom plate 6. The valve stem 2 is inserted into the through holes 8. An external thread cylinder 9 is fixedly sleeved on the valve stem 2. The external thread cylinder 9 is located within the rapid movement gap 7. An upper screw hole 10 matching the external thread cylinder 9 is provided on the bottom surface of the top plate 5. A lower screw hole 11 matching the external thread cylinder 9 is provided on the top surface of the bottom plate 6.

[0014] A connecting T-block 12 is provided at the lower end of the above-mentioned valve stem 2. The connecting T-block 12 is rotatably connected to a valve plate 13. The valve plate 13 is located inside the valve seat 1. The distance of the rapid movement gap 7 is equal to the opening and closing movement distance of the valve plate 13.

[0015] An adjusting handwheel 14 is provided at the upper end of the above-mentioned valve stem 2. The surface of the adjusting handwheel 14 is provided with anti-slip lines.

[0016] A sealing ring 15 is provided at the penetration of the above-mentioned valve stem 2 and the valve cover 3.

[0017] The centers of the above-mentioned valve stem 2, through holes 8, external thread cylinder 9, upper screw hole 10, and lower screw hole 11 are on the same central axis.

[0018] The specific use process of a manual flat valve of the present utility model: When it is necessary to open the manual flat valve, the operator tightly holds the adjusting handwheel 14 with both hands and rotates the adjusting handwheel 14 in the positive direction. When the external thread cylinder 9 of the valve stem 2 is disengaged from the lower screw hole 11 of the bottom plate 6, at this time, the operator pulls up the adjusting handwheel 14 to make the external thread cylinder 9 move rapidly upward within the rapid movement gap 7, thereby driving the valve plate 13 to move rapidly upward through the valve stem 2, and then realizing the function of rapid opening. When the external thread cylinder 9 abuts against the upper screw hole 10 of the top plate 5, continue to rotate the adjusting handwheel 14 in the positive direction to make the external thread cylinder 9 threadedly connected to the upper screw hole 10, and fix the valve plate 13 of the manual flat valve in the open state;

[0019] Similarly, when it is necessary to close the manual flat valve, the operator tightly holds the adjusting handwheel 14 with both hands and rotates the adjusting handwheel 14 in the reverse direction. After the external thread cylinder 9 of the valve stem 2 is disengaged from the upper screw hole 10 of the top plate 5, the operator then pushes the adjusting handwheel 14 downward, causing the external thread cylinder 9 to quickly move downward within the rapid movement gap 7. Thus, the valve plate 13 is driven by the valve stem 2 to quickly move downward, thereby achieving the function of rapid closing. After the external thread cylinder 9 abuts against the lower screw hole 11 of the bottom plate 6, continue to rotate the adjusting handwheel 14 in the reverse direction to thread-connect the external thread cylinder 9 with the lower screw hole 11, fixing the valve plate 13 of the manual flat valve in the closed state.

[0020] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art of this technology, without departing from the technical principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A manual flat valve, comprising a valve seat and a valve stem, characterized in that: A valve cover is fixedly provided on the top of the valve seat, a connecting vertical rod is fixedly provided on the top of the valve cover, a top plate is fixedly provided on the upper end of the connecting vertical rod, a bottom plate is fixedly provided on the lower end of the connecting vertical rod, a quick-moving gap is reserved between the top plate and the bottom plate, through holes are provided at the centers of the top plate and the bottom plate, the valve stem is passed through the through holes, an externally threaded barrel is fixedly sleeved on the valve stem, the externally threaded barrel is located in the quick-moving gap, an upper screw hole matching the externally threaded barrel is provided on the bottom surface of the top plate, and a lower screw hole matching the externally threaded barrel is provided on the top surface of the bottom plate.

2. A manual flat valve according to claim 1, characterized in that: A connecting T-block is provided at the lower end of the valve stem, and the connecting T-block is rotatably connected to a valve plate. The valve plate is located inside the valve seat, and the spacing of the quick-moving gap is equal to the switch moving distance of the valve plate.

3. A manual flat valve according to claim 2, characterized in that: An adjusting hand wheel is arranged at the upper end of the valve stem, and an anti-skid pattern is arranged on the surface of the adjusting hand wheel.

4. A manual flat valve according to claim 3, characterized in that: A sealing ring is provided at the penetration point between the valve stem and the valve cover.

5. A manual flat valve according to claim 4, characterized in that: The centers of the valve stem, the through hole, the external threaded barrel, the upper screw hole and the lower screw hole are on the same central axis.

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