Lifting type slow-closing one-way valve device

Abstract

The invention relates to the technical field of valves, and provides a lifting type slow-closing one-way valve device which comprises a valve body. Upper and lower openings of the valve body are respectively provided with an upper flange cover plate and a lower flange cover plate; the upper dead center limiter is fixedly mounted on the upper flange cover plate, and a low-resistance reset spring is fixedly mounted at the lower end of the upper dead center limiter; the lifting valve plate is arranged below the low-resistance reset spring; the valve body partition plate is fixedly connected to the interior of the middle main body part; the valve plate guide rod is fixedly installed on the valve body partition plate, and the lifting valve plate is arranged on the valve plate guide rod in a sleeving mode; the piston sleeve is mounted on the valve body partition plate; the piston and the fixed connecting rod are arranged in the piston sleeve; and the shock absorption damping spring is arranged in the piston sleeve and located below the piston, and the bottom end of the piston sleeve is plugged through an open nut. According to the technical scheme, the closing time of the valve plate can be delayed, the impact force of a water hammer on the valve clack is reduced, and the pressure of the pipeline water hammer is reduced.

Description

Technical Field

[0001] The present invention relates to the field of valve technology, in particular to a lifting type slow-closing one-way valve device. Background Art

[0002] Water hammer refers to the shock wave of water flow caused by the inertia of pressurized water flow when there is a sudden power outage or when the valve is closed too quickly. The instantaneous pressure generated by water hammer can reach dozens or even hundreds of times the normal working pressure in the pipeline. This large pressure fluctuation can cause strong vibration and noise in the pipeline system, and may damage the valve joints. It has a great destructive effect on the pipeline system.

[0003] Pressure pumping stations often have multiple pumps running alternately in parallel. A check valve device is installed at the outlet of the pumping station. Sudden power outages and pump stops will cause the check valve to close quickly, which can easily cause serious impact on the pipeline and valve components, affecting pipeline safety. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0005] To this end, the purpose of the present invention is to provide a lifting type slow-closing one-way valve device, which can delay the closing time of the valve plate, reduce the impact force generated by water hammer, reduce the water hammer pressure in the pipeline, and automatically open the slow-closing piston by using the front and rear pressure of the pipeline valve.

[0006] In order to achieve the above-mentioned purpose, the technical solution of the present invention provides a lifting type slow-closing one-way valve device, including: a valve body, the valve body includes an integrally formed intermediate main body, a liquid inlet connection part, and a liquid outlet connection part; the upper and lower openings of the valve body are respectively installed with an upper flange cover plate and a lower flange cover plate; an upper dead point limiter is fixedly installed on the upper flange cover plate, and a low-resistance return spring is fixedly installed on the lower end of the upper dead point limiter; a lifting valve plate is arranged below the low-resistance return spring; a valve body partition plate is fixedly connected to the inside of the intermediate main body, and is located between the connection position of the liquid inlet connection part and the intermediate main body, and the connection position of the liquid outlet connection part and the intermediate main body; a valve plate guide rod is fixedly installed on the valve body partition plate, and the lifting valve plate is sleeved on the valve plate guide rod; a piston sleeve is installed on the valve body partition plate; a piston and a fixed connecting rod are arranged inside the piston sleeve; a shock-absorbing damping spring is built into the piston sleeve and is located below the piston, and the bottom end of the piston sleeve is sealed by a perforated nut.

[0007] Preferably, the liquid inlet connection part is connected to the lower part of the middle main body part, the liquid outlet connection part is connected to the upper part of the middle main body part, and the inner diameter of the pipe openings at which the liquid inlet connection part and the liquid outlet connection part are connected to the pipe is the same, which is recorded as the pipe diameter; The channel sealing convex surface of the valve body partition plate is consistent with the tube bottom of the liquid outlet connection part and is higher than the top surface of the piston sleeve.

[0008] Preferably, the distance between the channel sealing convex surface of the valve body partition plate and the top surface of the piston sleeve is 1 cm, which can further ensure that the lifting valve plate can fully fall and effectively contact and seal with the channel sealing convex surface of the valve body partition plate, avoiding the lifting valve plate falling back and sealing being affected by the top surface of the piston sleeve being too high.

[0009] Preferably, the piston sleeve adopts a double-opening design at the top and the bottom, with a pressure equalizing hole at the top and a diameter of 2 cm to guide the fixed connecting rod, and a pressure blocking and pressure relief hole at the bottom and a diameter of 0.5 cm.

[0010] Preferably, the diameter of the lifting valve plate is 10 cm larger than the diameter of the pipe, so as to ensure that the piston and the fixed connecting rod can be supported on the lifting valve plate with damping. When the lifting valve plate falls and contacts the fixed connecting rod, the lifting valve plate is further slowed down. The maximum stroke of the lifting valve plate is 1.01-1.05 times the diameter of the pipe, which is beneficial to ensure that the water flow channel is not smaller than the pipe diameter, thereby ensuring smooth water flow.

[0011] Preferably, the length of the piston sleeve is equal to the diameter of the pipe, the length of the piston and the fixed connecting rod is 0.6 times the diameter of the pipe, and the minimum compression length of the shock-absorbing damping spring is 0.3 times the diameter of the pipe, thereby further ensuring that the lifting valve plate completely falls back to the channel sealing convex surface of the valve body partition plate.

[0012] Preferably, the maximum length of the shock-absorbing damping spring is 0.5 times the diameter of the pipeline, and the maximum elastic force is 0.6-0.7 times the pressure after the lifting valve plate is closed.

[0013] Preferably, the diameter of the channel hole formed by the valve body partition plate is equal to the diameter of the pipeline.

[0014] Preferably, two guide holes are provided on the lift valve plate, the two guide holes are symmetrical about the center of the lift valve plate, and the inner diameter of the guide hole is 1.5 times the diameter of the valve plate guide rod, thereby effectively ensuring that the lift valve plate can fall freely along the guide path without resistance.

[0015] The lifting type slow-closing one-way valve device proposed by the present invention has the following beneficial technical effects: (1) The present invention proposes a lifting type slow-closing one-way valve device, which utilizes the pressure relief of an incompressible fluid orifice to achieve the effect of increasing resistance and slowing down closing, and can effectively delay valve closing and reduce water hammer pressure.

[0016] (2) The present invention proposes a lifting type slow-closing one-way valve device, which, under the action of the inlet water flow and water pressure and the lifting of the sleeve piston and the connecting rod, lifts the valve plate to open the channel, allowing water to flow through the valve in one direction. The lifting pressure of the valve plate when it is opened is small, which reduces the local resistance, requires a smaller water pump head, and has lower operating costs. At the same time, it can effectively prevent backflow.

[0017] (3) The present invention proposes a lifting type slow-closing one-way valve device. When the water inflow to the pipeline stops suddenly and the inlet pressure disappears suddenly, the valve plate quickly falls back under the action of the low-resistance return spring and the return water pressure. When the lifting valve plate contacts the piston connecting rod end, the piston squeezes the water in the piston sleeve to release pressure and drain water downward, thereby reducing the downward return speed of the lifting valve plate and delaying the return time. When the piston further descends and contacts the shock-absorbing damping spring, the resistance is further increased under the action of the spring resistance, and the closing time is further prolonged, thereby reducing the water hammer pressure and ensuring the safety of the valve and pipeline.

[0018] (4) The present invention proposes a lifting type slow-closing one-way valve device, in which the convex sealing surface of the hole of the valve body partition plate is designed to be consistent with the bottom of the pipe of the liquid outlet connection part and 1 cm higher than the top surface of the piston sleeve. While delaying the return time of the lifting valve plate, reducing its return speed and reducing the water hammer pressure, it ensures that the lifting valve plate can fully fall to effectively contact with the convex sealing surface of the hole of the valve body partition plate, avoiding the lifting valve plate The seal is affected by the excessive height of the top surface of the piston sleeve.

[0019] (5) The present invention proposes a lifting type slow-closing one-way valve device, which has a unique design for the diameter and maximum stroke of the lifting valve plate. On the one hand, it can ensure that the water flow channel is not less than the pipe diameter, thereby ensuring smooth water flow. On the other hand, it can ensure that when the lifting valve plate falls to a certain extent, it can contact with the fixed connecting rod, ensuring that the piston and the fixed connecting rod can be supported on the lifting valve plate with damping, thereby further slowing down the return of the lifting valve plate, further reducing the water hammer pressure, and ensuring that it can effectively return and close.

[0020] (6) The lifting type slow-closing one-way valve device proposed in the present invention has a unique design for the length of the piston sleeve, the length of the piston and the fixed connecting rod, and the compression parameters of the shock-absorbing damping. On the one hand, it ensures the damping slow-closing effect and reduces the water hammer pressure. On the other hand, it can ensure that the lifting valve plate can completely fall back to the channel sealing convex surface of the valve body partition plate to ensure the sealing closure of the one-way valve.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description and, in part, will be obvious from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 A schematic diagram of the top view of the structure of a lifting slow-closing one-way valve device according to the present invention in a non-use state is shown; Figure 2 Shown along Figure 1 A schematic diagram of the longitudinal section along the 1-1 direction; Figure 3 Shown along Figure 1 A schematic diagram of the longitudinal section along the 2-2 direction; Figure 4 It shows a structural schematic diagram of a lifting type slow-closing one-way valve device according to the present invention when the lifting valve plate is in an open state; Figure 5 A schematic structural diagram of a lift type slow-closing one-way valve device according to the present invention is shown in a lift valve plate closed state.

[0023] in, Figures 1 to 5 The corresponding relationship between the reference numerals and the components is as follows: 102 valve body, 1021 middle main body, 1022 liquid inlet connection part, 1023 liquid outlet connection part, 104 upper flange cover plate, 106 lower flange cover plate, 108 top dead center stopper, 110 low resistance return spring, 112 lifting valve plate, 1121 guide hole, 114 valve body partition plate, 1141 channel sealing convex surface, 1142 channel hole, 116 valve plate guide rod, 118 piston sleeve, 1181 pressure equalizing hole, 1182 pressure blocking and pressure relief hole, 120 piston, 122 fixed connecting rod, 124 shock absorbing damping spring, 126 hole nut. DETAILED DESCRIPTION

[0024] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0025] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0026] Combine the following Figures 1 to 5 A lifting type slow-closing one-way valve device according to an embodiment of the present invention is described in detail.

[0027] like Figures 1 to 5As shown, a lifting slow-closing one-way valve device according to an embodiment of the present invention comprises: a valve body 102, an upper flange cover plate 104, a lower flange cover plate 106, an upper dead point stopper 108, a lifting valve plate 112, a valve body partition plate 114, a valve plate guide rod 116, a piston sleeve 118, a piston 120 and a fixed connecting rod 122, a shock-absorbing damping spring 124, a perforated nut 126, etc. The valve body 102 comprises an integrally formed intermediate main body 1021, a liquid inlet connection part 1022, and a liquid outlet connection part 1023. The upper and lower openings of the valve body 102 are respectively installed with the upper flange cover plate 104 and the lower flange cover plate 106, and are connected by blind flange sealing, which is convenient for maintenance and disassembly. The valve body 102 is made of stainless steel. Taking a DN300 one-way valve device as an example, the diameter of the intermediate main body 1021 is DN500, and the diameters of the liquid inlet connection part 1022 and the liquid outlet connection part 1023 are DN300. The upper stop stopper 108 is fixedly installed on the upper flange cover plate 104, and the upper stop stopper 108 is welded to the upper flange cover plate 104. The low resistance return spring 110 is fixedly installed at the lower end to facilitate the closing and resetting of the one-way valve. The lifting valve plate 112 is arranged below the low resistance return spring 110, and the valve body partition plate 114 is fixedly connected to the inside of the middle main body 1021, and is located between the connection position of the liquid inlet connection part 1022 and the middle main body 1021, and the connection position of the liquid outlet connection part 1023 and the middle main body 1021. The valve plate guide rod 116 is fixedly installed on the valve body partition plate 114, and the lifting valve plate 112 is sleeved on the valve plate guide rod 116, so that the lifting valve plate 112 can move up and down. A piston sleeve 118 is installed on the valve body partition plate 114, and a piston 120 and a fixed connecting rod 122 are arranged inside the piston sleeve 118. The diameters of the piston 120 and the piston sleeve 118 match each other and can slide freely in the piston sleeve 118. The cylinder diameter of the piston 120 can adopt a 4cm aperture, and the diameter of the fixed connecting rod 122 can adopt a 1cm diameter. A shock-absorbing damping spring 124 is built in the piston sleeve 118, and the shock-absorbing damping spring 124 is located below the piston 120. The bottom end of the piston sleeve 118 is blocked by a perforated nut 126. When water enters the pipeline, water enters the piston sleeve 118 through the hole of the perforated nut 126. In this way, when the pipeline suddenly stops entering water, the incompressible fluid small hole can be used to release pressure based on the "syringe" principle, so as to achieve the purpose of increasing resistance and slowing down closing, delay valve closing, reduce water hammer pressure, and cooperate with the shock-absorbing damping spring 124 to achieve step-by-step pressure reduction and reduce valve impact force.

[0028] Furthermore, if Figures 1 to 5As shown, the liquid inlet connection part 1022 is connected to the lower part of the middle main body part 1021, and the liquid outlet connection part 1023 is connected to the upper part of the middle main body part 1021. The inner diameter of the pipe opening to which the liquid inlet connection part 1022 and the liquid outlet connection part 1023 are connected is the same, which is recorded as the pipe diameter. Thus, the water pressure in the pipe can be used as the lifting power of the lifting valve plate 112, reducing local resistance, reducing operating costs, and meeting the backflow prevention requirements. The channel sealing convex surface 1141 of the valve body partition plate 114 is consistent with the pipe bottom of the liquid outlet connection part 1023, and is higher than the top surface of the piston sleeve 118, so as to facilitate the lifting valve plate 112 to fall back and close the seal.

[0029] Furthermore, if Figure 2 As shown, the distance between the pore sealing convex surface 1141 of the valve body partition plate 114 and the top surface of the piston sleeve 118 is 1 cm. Thus, while delaying the return time of the lift valve plate 112, reducing its return speed, and reducing the water hammer pressure, it is ensured that the lift valve plate 112 can fully fall to effectively contact the pore sealing convex surface of the valve body partition plate 114, avoiding the impact of the lift valve plate 112 return seal due to the excessive height of the top surface of the piston sleeve 118.

[0030] Furthermore, if Figure 2 As shown, the piston sleeve 118 adopts a double-opening design at the top and bottom, and a pressure equalizing hole 1181 is provided at the top. The diameter of the pressure equalizing hole 1181 is 2 cm, which can guide the fixed connecting rod 122 to ensure the up and down movement path of the piston 120 and the fixed connecting rod 122. A pressure-blocking and pressure-relieving hole 1182 is provided at the bottom of the piston sleeve 118. The diameter of the pressure-blocking and pressure-relieving hole 1182 is 0.5 cm, which can achieve step-by-step pressure reduction and reduce the impact force of the valve.

[0031] Furthermore, the diameter of the lifting valve plate 112 is 10 cm larger than the diameter of the pipe, and the maximum stroke of the lifting valve plate 112 is 1.01-1.05 times the diameter of the pipe. On the one hand, it can ensure that the water flow channel is not less than the diameter of the pipe, ensuring smooth water flow, and on the other hand, it can ensure that when the lifting valve plate 112 falls to a certain extent, it can contact with the fixed connecting rod 122, ensuring that the piston 120 and the fixed connecting rod 122 can be supported on the lifting valve plate 112 with damping, realizing further slowing down of the lifting valve plate 112, further reducing the water hammer pressure, and ensuring that it can effectively fall back and close.

[0032] Furthermore, the length of the piston sleeve 118 is equal to the pipe diameter, the length of the piston 120 and the fixed connecting rod 122 is 0.6 times the pipe diameter, and the minimum compression length of the shock-absorbing damping spring 124 is 0.3 times the pipe diameter, thereby further ensuring that the lifting valve plate completely falls back onto the duct sealing convex surface of the valve body partition plate. Furthermore, the maximum length of the shock-absorbing damping spring 124 is 0.5 times the pipe diameter, and the maximum elastic force is 0.6-0.7 times the pressure after the lifting valve plate 112 is closed. Thus, the closing time of the lifting valve plate 112 can be reasonably delayed to reduce the harm of water hammer. At the same time, the lifting valve plate 112 can be reasonably lifted and lowered in coordination with the water inlet pressure or the return water pressure, thereby realizing the one-way check and anti-backflow functions.

[0033] Furthermore, the diameter of the channel hole 1142 formed by the valve body partition plate 114 is equal to the diameter of the pipeline, thereby ensuring the stability of the water flow when the pipeline is normally filled with water.

[0034] Furthermore, two guide holes 1121 are provided on the lifting valve plate 112, and the two guide holes 1121 are symmetrical about the center of the lifting valve plate 112, and the inner diameter of the guide hole 1121 is 1.5 times the diameter of the valve plate guide rod 116. Therefore, it is convenient for the lifting valve plate 112 to move up and down, and the moving path remains unchanged, which is conducive to ensuring the closed sealing effect, and at the same time, effectively ensuring that the lifting valve plate can fall freely along the guide path without resistance.

[0035] The working process of a lifting type slow-closing one-way valve device proposed by the present invention is as follows: The lifting slow-closing one-way valve device is installed horizontally and connected to the pipeline; when water enters the pipeline, the lifting valve plate 112 is lifted under the action of the inlet water flow and water pressure, and the water flows through the valve device in one direction, such as Figure 4 As shown; when the water inflow to the pipeline stops suddenly and the inlet pressure disappears suddenly, the outlet water flows back quickly. Under the action of the low-resistance return spring 110 and the return water pressure, the lift valve plate 112 falls back quickly. When the lift valve plate 112 falls back to contact the end of the fixed connecting rod 122 connected to the piston 120, the water in the piston sleeve 118 is squeezed by the piston 120 to release pressure and drain water downward, thereby reducing the downward falling speed of the lift valve plate 112 and delaying the falling time; when the piston 120 further descends and contacts the shock-absorbing damping spring 124 inside the piston 120, the resistance is further increased under the action of the spring resistance, and the closing time is further extended, thereby achieving the effect of reducing the water hammer pressure, until the lift valve contacts the channel sealing convex surface 1141 of the valve body partition plate 114 to achieve closed sealing, as shown in FIG. Figure 5 As shown; when the pipeline resumes normal water inflow and the water inlet pressure is greater than the upper pressure, the self-weight resistance of the lifting valve plate 112 and the upper pressure are overcome, the lifting valve plate 112 is lifted, the shock-absorbing damping spring 124 is reset upward, and the lifting valve plate 112 moves upward until the force is balanced, opening the one-way water flow.

[0036] In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “front” and “back” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the present invention.

[0038] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A lifting type slow closing one-way valve device, characterized in that: include: The valve body comprises an integrally formed intermediate main body, a liquid inlet connection part and a liquid outlet connection part; the upper and lower openings of the valve body are respectively mounted with an upper flange cover plate and a lower flange cover plate; the top dead center limiter is fixedly mounted on the upper flange cover plate, and a low resistance return spring is fixedly mounted on the lower end of the top dead center limiter; a lifting valve plate is arranged below the low resistance return spring; a valve body partition plate is fixedly connected to the inside of the intermediate main body, and is located between the connection position of the liquid inlet connection part and the intermediate main body, and the connection position of the liquid outlet connection part and the intermediate main body; a valve plate guide rod is fixedly mounted on the valve body partition plate, and the lifting valve plate is sleeved on the valve plate guide rod; a piston sleeve is mounted on the valve body partition plate; the piston and the fixed connecting rod are arranged inside the piston sleeve; a shock-absorbing damping spring is built into the piston sleeve and is located below the piston, and the bottom end of the piston sleeve is sealed by a perforated nut.

2. The lifting type slow closing one-way valve device according to claim 1, characterized in that: The liquid inlet connection part is connected to the lower part of the middle main body part, and the liquid outlet connection part is connected to the upper part of the middle main body part. The inner diameter of the pipe orifice connected to the liquid inlet connection part and the liquid outlet connection part is the same, which is recorded as the pipe diameter; the channel sealing convex surface of the valve body partition plate is consistent with the bottom of the pipe of the liquid outlet connection part, and is higher than the top surface of the piston sleeve.

3. The lifting type slow closing one-way valve device according to claim 2, characterized in that: The distance between the channel sealing convex surface of the valve body partition plate and the top surface of the piston sleeve is 1 cm.

4. The lifting type slow closing one-way valve device according to claim 1, characterized in that: The piston sleeve adopts a double-opening design at the top and the bottom, with a pressure equalizing hole at the top and a diameter of 2 cm to guide the fixed connecting rod, and a pressure blocking and pressure relief hole at the bottom and a diameter of 0.5 cm.

5. The lifting type slow closing one-way valve device according to claim 2, characterized in that: The diameter of the lifting valve plate is 10 cm larger than the diameter of the pipeline, and the maximum stroke of the lifting valve plate is 1.01-1.05 times the diameter of the pipeline.

6. The lifting type slow closing one-way valve device according to claim 2, characterized in that: The length of the piston sleeve is equal to the diameter of the pipe, the length of the piston and the fixed connecting rod is 0.6 times the diameter of the pipe, and the minimum compression length of the shock-absorbing damping spring is 0.3 times the diameter of the pipe.

7. The lifting type slow closing one-way valve device according to claim 6, characterized in that: The maximum length of the shock-absorbing damping spring is 0.5 times the diameter of the pipeline, and the maximum elastic force is 0.6-0.7 times the pressure after the lifting valve plate is closed.

8. The lifting type slow closing one-way valve device according to claim 2, characterized in that: The diameter of the passage hole formed by the valve body partition plate is equal to the diameter of the pipeline.

9. The lifting type slow closing one-way valve device according to claim 1, characterized in that: Two guide holes are arranged on the lifting valve plate, and the two guide holes are symmetrical about the center of the lifting valve plate. The inner diameter of the guide hole is 1.5 times the diameter of the valve plate guide rod.

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