Hydroelectric pressure steel pipe service valve air valve group
By designing an air valve group with an air suction valve core and a filter mesh cylinder, the contradiction between exhaust and air suction of the water and electricity pressure steel pipe during water filling and pipe bursting is solved, and the effect of slow exhaust and fast air suction is achieved, protecting the steel pipe and preventing debris from entering.
Patent Information
- Application Number
- CN202423055051.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-11
- Publication Date
- 2025-09-26
- Estimated Expiration
- 2034-12-11
AI Technical Summary
The existing air valve group of the water and electricity pressure steel pipe inspection valve cannot simultaneously achieve slow exhaust and fast intake during water filling and pipe bursting, resulting in damage to the steel pipe or water filling speed not meeting the requirements.
An air valve group including a manual ball valve and an intake valve was designed. The intake valve has a circular intake valve core and valve seat, and is equipped with a gas collecting pipe and a filter cylinder. The sealing and opening of the valve core are controlled by a pre-tightening spring and a limit component. Combined with the valve core pull rod with a thickened outer diameter in the middle section, slow exhaust and fast intake are achieved.
It can achieve both slow exhaust and fast intake under different working conditions, protecting the steel pipe from damage, and preventing debris from entering through the filter cylinder to avoid damage to the steel pipe.
Smart Images
Figure CN223388417U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an air valve group for a water and electricity pressure steel pipe inspection valve. Background Art
[0002] The air valve group of the water and electricity pressure steel pipe inspection valve in the prior art includes an inspection valve and an air valve group installed on the water and electricity pressure steel pipe. The air valve group is located on the water and electricity pressure steel pipe downstream of the inspection valve, and the air valve group includes a manual ball valve and an air valve.
[0003] In a hydropower station, water from the reservoir is introduced into the turbine through a hydraulic pressure pipe, driving the turbine to generate electricity. Installing a service valve on the hydraulic pressure pipe ensures that the water in the pipe does not need to be drained during turbine maintenance, avoiding waste and saving water filling time. The air valve has two functions: first, it vents air when the hydraulic pressure pipe is filling, controlling the filling rate by adjusting the exhaust speed; second, it inflates the pipe when the service valve is quickly closed in the event of a pipe burst downstream of the service valve, preventing a vacuum in the pipe and further damage.
[0004] During the filling process of a hydraulic pressure steel pipe, the exhaust speed of the air valve is used to control the filling speed. Due to the large drop and high head of the hydraulic pressure steel pipe, the filling speed is subject to certain requirements. A slower filling speed requires the exhaust valve to exhaust slowly. Conversely, if the hydraulic pressure steel pipe bursts downstream, water will quickly flow out, resulting in a very large flow rate, necessitating a very fast intake speed. This creates a contradiction in the selection of air valves: larger air valves have faster intake speeds, but also faster exhaust speeds, making it impossible to control the filling speed; smaller air valves cannot meet the intake requirements when the hydraulic pressure steel pipe bursts. Utility Model Content
[0005] The technical problem to be solved by the utility model is to overcome the above-mentioned shortcomings and propose an air valve group for a water-electric pressure steel pipe inspection valve with slow exhaust and fast intake.
[0006] In order to solve the above technical problems, the utility model provides an air valve group of a water and electricity pressure steel pipe inspection valve, comprising an inspection valve and an air valve group installed on the water and electricity pressure steel pipe, the air valve group being located on the water and electricity pressure steel pipe downstream of the inspection valve, the air valve group comprising a manual ball valve and an air valve, the air valve group also comprising an intake valve, the intake valve having a matching circular intake valve core and a circular intake valve seat, the bottom of the intake valve seat being connected to an air collecting pipe, the bottom of the air collecting pipe being connected to the water and electricity pressure steel pipe, the manual ball valve being connected to the lower part of the air collecting pipe through a pipe fitting, when the water and electricity pressure steel pipe located downstream of the air valve group bursts, the intake valve core can be separated from the intake valve seat, and when the pressure in the water and electricity pressure steel pipe is not less than normal pressure, the intake valve core can be sealed and matched with the intake valve seat.
[0007] Furthermore, the intake valve core is located below the intake valve seat, and a guide sleeve is positioned at the center of the intake valve seat. A copper sleeve is interference fit in the guide sleeve, and the bottom end of the valve core pull rod passes through the copper sleeve in the guide sleeve and extends downward and is fixed on the intake valve core. A preload spring is installed on the valve core pull rod above the guide sleeve, and a limiting component is also provided on the upper part of the valve core pull rod to prevent the preload spring from sliding upward. Limiting columns are fixed at intervals on the circumference of the intake valve seat, and a circular top cover is installed on the top of the limiting column. A connected guide cylinder is provided at the axis center of the circular top cover, and the upper part of the valve core pull rod extends into the guide cylinder.
[0008] As an improvement of the present invention, a filter cylinder capable of filtering air is fixed between the circular top cover and the circular air intake valve seat.
[0009] As a further improvement of the present invention, the limiting component includes an adjusting nut and a clamping washer, the adjusting nut is screwed on the upper part of the valve core pull rod, and the clamping washer is located on the valve core pull rod between the adjusting nut and the top of the preload spring.
[0010] As a further improvement of the present invention, the valve core pull rod has a middle thick rod section with a thicker outer diameter, and the outer diameter of the thick rod section is larger than the inner diameter of the copper sleeve.
[0011] The utility model has the following beneficial technical effects: First, the utility model can realize both slow exhaust and rapid intake, which can avoid damage to the steel pipe caused by a large vacuum degree generated inside when the downstream water and electricity pressure steel pipe bursts; second, when a large amount of air is inhaled, there is a filter cylinder for protection, which can prevent larger debris from entering the water and electricity pressure steel pipe; third, after the valve core pull rod is provided with a middle thick rod section, the stroke of the intake valve core can be controlled, which can avoid damage to the pre-tightening spring caused by excessive compression. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] The present invention will be described in further detail below with reference to the accompanying drawings.
[0013] Figure 1 The utility model is a schematic diagram of the structure of an air valve group of a water and electric pressure steel pipe inspection valve.
[0014] Figure 2 yes Figure 1 Enlarged schematic diagram of the air valve group.
[0015] Figure 3 yes Figure 2 Enlarged schematic diagram of the middle suction valve. DETAILED DESCRIPTION
[0016] See also Figure 1 - Figure 3The utility model relates to an air valve group of a water and electricity pressure steel pipe inspection valve, comprising a inspection valve 200 and an air valve group 300 installed on the water and electricity pressure steel pipe 100. The air valve group is located on the water and electricity pressure steel pipe downstream of the inspection valve. The air valve group comprises a manual ball valve 310 and an air valve 320, characterized in that: the air valve group 300 also includes an intake valve 330, which has a matching circular intake valve core 331 and a circular intake valve seat 332. The bottom of the intake valve seat is connected to an air collecting pipe 333, and the bottom of the air collecting pipe is connected to the water and electricity pressure steel pipe 100. The manual ball valve 310 is connected to the lower part of the air collecting pipe 333 through a pipe fitting 311. When the water and electricity pressure steel pipe located downstream of the air valve group 300 bursts, the intake valve core can be separated from the intake valve seat. When the pressure in the water and electricity pressure steel pipe is not less than normal pressure, the intake valve core can be sealed and matched with the intake valve seat. The intake valve core 331 is positioned below the intake valve seat 332. A guide sleeve 334 is positioned at the center of the intake valve seat. A copper sleeve 335 is installed within the guide sleeve for an interference fit. The bottom end of a valve core pull rod 336 extends downward through the copper sleeve within the guide sleeve and is fixed to the intake valve core. The valve core pull rod can slide up and down within the copper sleeve. A preload spring 337 is installed on the valve core pull rod above the guide sleeve. A limit member 338 is also provided on the upper portion of the valve core pull rod to prevent the preload spring from sliding upward. Limiting posts 339 are fixed at intervals around the circumference of the intake valve seat. A circular top cover 340 is installed on the top of the limiting posts. A guide cylinder 341 is connected to the axis of the circular top cover 340. The upper portion of the valve core pull rod 336 extends into this guide cylinder. A filter screen cylinder 342 for filtering air is also fixed between the circular top cover 340 and the circular intake valve seat 332. The limiting member 338 includes an adjusting nut 3381 and a compression washer 3382. The valve stem pull rod has a threaded upper portion, onto which the adjusting nut is screwed. The compression washer is located on the valve stem pull rod between the adjusting nut and the top of the preload spring 337. The outer diameter of the compression washer is slightly smaller than the inner diameter of the guide cylinder 341. The valve stem pull rod 336 includes a thicker intermediate section 3361 with a gradually thicker outer diameter. The outer diameter of the thicker section is larger than the inner diameter of the copper sleeve 335.
[0017] In the present invention, an intake valve core and an intake valve seat of appropriate caliber can be selected according to the water pressure in the water pressure steel pipe, and an air collecting pipe of appropriate caliber can be selected to meet the intake requirements when the water pressure steel pipe bursts. In the present invention, the intake valve core is pressed against the intake valve seat by a pre-tightening spring through a valve core pull rod. At this time, the intake valve core and the intake valve seat are in a sealed state. As the pressure in the water pressure steel pipe rises, the intake valve core will be pressed tighter and tighter to ensure that there will be no leakage. The pre-tightening force of the pre-tightening spring on the intake valve core can be adjusted by the adjusting nut. In order to prevent external debris from entering the water pressure steel pipe during intake, a filter screen cylinder is set at the top. The filter screen cylinder is a stainless steel cylinder with small holes that allows air to pass through while preventing larger debris from passing through.
[0018] The air valve assembly in the present invention has two working states. First, when the water pressure steel pipe is filled with water, the air inside the pipe is discharged outward through the air valve. At this time, the air intake valve core is closed under the action of the spring. The caliber of the air valve is selected according to the speed of water filling to meet the water filling requirements. Second, when the downstream water pressure steel pipe bursts, the inspection valve is quickly closed. Due to the loss of downstream water, the liquid level in the air valve drops, and the air valve quickly opens to suck air into the water pressure steel pipe. Because the water flow rate is very high when the pipe bursts, the air passing through the air valve cannot fully meet the replenishment needs. Negative pressure is generated in the water pressure steel pipe. The negative pressure causes the air intake valve core on the upper part of the gas collecting pipe to open, allowing a large amount of air to enter the water pressure steel pipe, avoiding the formation of a vacuum in the pipe and causing harm. The air valve assembly in the present invention can exhaust air slowly or quickly, meeting the needs of different working conditions. The air valve is of an integrated type, integrating large exhaust and micro exhaust functions. The large exhaust meets the requirements of pipeline filling, and the micro exhaust can discharge gas that appears in the steel pipe at any time. The preload force of the intake valve core in this utility model can be adjusted, thereby controlling the opening pressure of the intake valve core and meeting the need for rapid opening and intake. During large-volume intake, the filter cartridge provides protection, preventing large debris from entering the water and electricity pressure steel pipe and adversely affecting downstream flow. The adjusting nut also adjusts the preload force of the preload spring, thereby adjusting the opening pressure of the circular intake valve core.
[0019] It can be understood that the above specific description of the present invention is only used to illustrate the present invention and is not limited to the technical solutions described in the embodiments of the present invention. Any modification or equivalent replacement of the present invention to achieve the same technical effect is within the scope of protection of the present invention.
Claims
1. A water-pressure steel pipe inspection valve air valve assembly, comprising an inspection valve (200) and an air valve assembly (300) mounted on the water-pressure steel pipe (100), the air valve assembly being located on the water-pressure steel pipe downstream of the inspection valve, the air valve assembly comprising a manual ball valve (310) and an air valve (320), characterized in that: The air valve group (300) further includes an air intake valve (330), which has a matching circular air intake valve core (331) and a circular air intake valve seat (332). The bottom of the air intake valve seat is connected to an air collecting pipe (333), and the bottom of the air collecting pipe is connected to the water and electricity pressure steel pipe (100). The manual ball valve (310) is connected to the lower part of the air collecting pipe (333) through a pipe fitting (311). When the water and electricity pressure steel pipe located downstream of the air valve group (300) bursts, the air intake valve core can be separated from the air intake valve seat. When the pressure in the water and electricity pressure steel pipe is not less than normal pressure, the air intake valve core can be sealed and matched with the air intake valve seat.
2. The air valve assembly for the hydraulic pressure steel pipe inspection valve according to claim 1, characterized in that: The suction valve core (331) is located below the suction valve seat (332), and a guide sleeve (334) is positioned at the center of the suction valve seat. A copper sleeve (335) is interference-fitted in the guide sleeve. The bottom end of the valve core pull rod (336) passes through the copper sleeve in the guide sleeve and extends downward to be fixed on the suction valve core. A preload spring (337) is installed on the valve core pull rod above the guide sleeve. A limiting component (338) is also provided on the upper part of the valve core pull rod to prevent the preload spring from sliding upward. Limiting columns (339) are fixed at intervals on the circumference of the suction valve seat, and a circular top cover (340) is installed on the top of the limiting column. A connected guide cylinder (341) is provided at the axis of the circular top cover (340), and the upper part of the valve core pull rod (336) extends into the guide cylinder.
3. The air valve assembly for the hydraulic pressure steel pipe inspection valve according to claim 2, characterized in that: A filter cylinder (342) capable of filtering air is also fixed between the circular top cover (340) and the circular air intake valve seat (332).
4. The air valve assembly for the hydraulic pressure steel pipe inspection valve according to claim 2, characterized in that: The limiting member (338) includes an adjusting nut (3381) and a compression washer (3382), wherein the adjusting nut is screwed onto the upper portion of the valve core pull rod, and the compression washer is located on the valve core pull rod between the adjusting nut and the top of the preload spring (337).
5. The air valve assembly for the hydraulic pressure steel pipe inspection valve according to claim 2, characterized in that: The valve core pull rod (336) has a middle thick rod section (3361) with a thickened outer diameter in the middle section, and the outer diameter of the thick rod section is larger than the inner diameter of the copper sleeve (335).