A one-way check valve for a substation drainage outlet

Abstract

The utility model discloses a one -way check valve for transformer substation drainage outlet of prevent back -in, belong to drainage valve technical field, this valve includes water tank subassembly and prevent back -in subassembly, prevent back -in subassembly includes first outer shell, the first outer shell in slide setting has by spring push to realize one -way seal's valve core, the valve still includes fixed component, fixed component includes the hook fixed in the water tank subassembly peripheral shell, is used for anchoring in the drainage mouth peripheral wall's barb, and is connected in the hook with the barb between the hanging pole, the utility model discloses through the fixed component of additional fixed whole valve and wall firm anchoring, solved the major safety hidden danger problem of the existing check valve when encountering the great back -in water pressure possibly being whole and causing the protection failure, simple and reliable structure has greatly promoted the drainage safety of important facilities such as transformer substation.

Description

Technical Field

[0001] This utility model relates to the field of drainage valve technology, and in particular to a one-way check valve for substation drainage outlets that prevents backflow. Background Technology

[0002] As the core hub of the power system, the safe and stable operation of substations is of paramount importance. To prevent rainwater and accumulated water from damaging internal electrical equipment, one-way check valves are typically installed at the drainage outlets. These valves allow internal water to drain normally while automatically closing when the external water level is higher than the drainage outlet to prevent backflow. They are a fundamental protective facility for ensuring the safety of substations.

[0003] However, when encountering extreme weather such as rainstorms and urban flooding, the technical port of the drainage valve may face instantaneous and huge external water pressure impact. This backflow water pressure not only far exceeds the normal situation, but also generates a strong overall thrust on the entire check valve device.

[0004] Existing check valves are mostly installed by means of flange connection, socket connection or direct installation into the outlet of drainage pipe. These installation methods mainly rely on the strength of the connector or the bonding force between the valve and the pipe to fix the valve. Under normal backflow pressure, this fixing method is effective. However, when the overall thrust formed by the backflow water pressure exceeds the bearing limit of the connector or the bonding force between the valve and the pipe, catastrophic consequences will occur: the entire valve device will be pushed out and washed away from the drain outlet.

[0005] Once the valve is completely detached, the drain outlet will become an unprotected channel, allowing a large amount of external water to rush into the substation instantly, causing devastating damage to expensive electrical equipment and seriously threatening power grid security. Current technology clearly lacks an effective means to ensure the valve's structural stability under extreme water pressure.

[0006] Therefore, this utility model proposes a one-way check valve for substation drainage outlets to prevent backflow, thereby overcoming the shortcomings of the prior art. Utility Model Content

[0007] To overcome the above deficiencies, this utility model provides a one-way check valve for substation drainage outlets that prevents backflow. The aim is to address the significant safety hazard of one-way check valves for substation drainage outlets being pushed out of the drainage outlet and causing complete failure of protection when encountering extremely high backflow water pressure. This utility model aims to provide a one-way check valve for substation drainage outlets with an improved structure that can effectively solve the above problems.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a one-way check valve for a substation drainage outlet to prevent backflow, comprising: a water tank assembly, an anti-backflow assembly, and a valve core structure; the water tank assembly includes an outer shell and a base plate fixed to the bottom of the outer shell; the anti-backflow assembly includes a hollow first outer shell, an inlet pipe fixedly connected to one axial end of the first outer shell and extending upward through the base plate, and an outlet pipe fixedly connected to the other axial end of the first outer shell; a valve core is slidably disposed within the cavity of the first outer shell along the axial direction of the first outer shell, the valve core including a check valve and a second outer shell for sealing the inlet of the inlet pipe; a bracket is fixedly disposed within the cavity of the first outer shell, the bracket being located between the valve core and the outlet pipe, and a spring is disposed inside the valve core, one end of the spring abutting against the valve core and the other end abutting against the bracket.

[0009] The valve also includes a fixing component with anti-dislodgement anchoring function, which includes a hook fixed to the outer wall of the outer shell, barbs with multiple spikes for anchoring to the wall around the drain outlet, and a hanging rod.

[0010] The two ends of the hanging rod are detachably connected to the hook and the barb, respectively, and the valve body is anchored to the installation position by the connecting chain formed by the hook, the hanging rod and the barb.

[0011] Preferably, the barb includes a central rod and a plurality of barbs hinged to the periphery of the central rod. A storage groove for accommodating the barbs is provided on the side wall of the central rod. The root of the barb is rotatably connected to the storage groove by a pin, so that the barb can rotate relative to the central rod to fold and store in the storage groove or open outward.

[0012] Preferably, one end of the hanging rod is formed as an L-shaped hook that cooperates with the hook, and the other end of the hanging rod is formed as an insertion part that is inserted into the insertion hole provided on the barb, and the hook is fastened to the edge of the outer shell.

[0013] Preferably, the second housing has a rearwardly opening receiving cavity, one end of the spring extends into the receiving cavity and abuts against the bottom of the receiving cavity, and the other end of the spring abuts against the end face of the bracket.

[0014] Preferably, the inner wall of the first outer shell has a plurality of guide ribs evenly distributed along the axial direction, the outer wall of the second outer shell is slidably fitted with the guide ribs, and a flow channel for water to flow through is formed between adjacent guide ribs.

[0015] Preferably, the water inlet pipe has a bent pipe structure, and its outlet end face located inside the first housing is perpendicular to the axis of the first housing. The front end face of the second housing is provided with a sealing gasket that cooperates with the outlet end face. The sealing gasket is attached to the outlet end face under the preload of the spring.

[0016] Preferably, the top of the outer shell extends outward along its circumference to form a mounting flange, and the top of the hook is hooked onto the upper surface of the mounting flange to transmit the force generated by the backflow water pressure to the hanging rod.

[0017] Preferably, the bracket includes a fixing ring and a support seat disposed at the center of the fixing ring. The fixing ring is fixedly connected to the inner wall of the first housing near the end of the water outlet pipe. The fixing ring has multiple through holes to allow water to flow to the water outlet pipe.

[0018] This utility model has the following beneficial effects: 1. This utility model, by adding a fixing component consisting of hooks, hanging rods and barbs, anchors the valve body to the wall around the drain outlet, solving the problem in the prior art that the check valve may be completely pushed out when encountering extremely high backflow water pressure, resulting in complete failure of protection. It achieves the technical effect of keeping the valve firmly in place under extreme conditions, greatly improving the safety protection level of the drain valve.

[0019] 2. This utility model solves the problems of complex installation and significant damage to the installation surface caused by traditional fixing methods by setting barbs that can switch between retracted and open states, thus achieving the technical effects of convenient installation, strong anchoring force, and minimal impact on the surrounding structure. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of a one-way check valve for preventing backflow in a substation drainage outlet, as proposed in this utility model. Figure 2 This is a schematic diagram of the inlet pipe section of a one-way check valve for preventing backflow in a substation, as proposed in this utility model. Figure 3 This utility model presents a schematic diagram of the check valve portion of a one-way check valve for preventing backflow at a substation drainage outlet. Figure 4 This is a schematic diagram of the hook portion of a one-way check valve for preventing backflow in a substation drainage outlet, as proposed in this utility model.

[0021] Legend: 1. Water tank assembly; 101. Outer shell; 102. Base plate; 2. Anti-backflow assembly; 201. Inlet pipe; 202. First outer shell; 203. Outlet pipe; 204. Check valve; 205. Second outer shell; 206. Spring; 207. Bracket; 3. Fixing assembly; 301. Fixing block; 302. Hanging rod; 303. Barb. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0023] Please refer to Figures 1 to 4 This utility model provides a one-way check valve for substation drainage outlets to prevent backflow. It aims to solve the problem that existing drainage check valves used in substations may be pushed out of the drainage outlet when encountering extremely high backflow water pressure, resulting in complete failure of protection and unreliable sealing structure.

[0024] like Figure 1 and Figure 2 As shown, the substation drainage outlet anti-backflow device is assembled into an organic whole using a one-way check valve. It mainly includes a water tank assembly 1 located at the top, an anti-backflow assembly 2 fixedly connected to the bottom of the water tank assembly 1, and a fixing assembly 3 distributed around the water tank assembly 1 to anchor the entire valve in the installation environment. The water tank assembly 1 is used to collect the water accumulated on the substation ground and vertically guide it into the flow channel below. The anti-backflow assembly 2 is used to construct a physical channel for one-way flow and use its internal structure to achieve automatic opening and closing and reverse shut-off. The fixing assembly 3 is used to rigidly connect the water tank assembly 1 to the wall or soil around the drainage outlet to resist backflow water pressure.

[0025] The water tank assembly 1 includes an outer shell 101 and a base plate 102 fixed to the bottom of the outer shell 101. The outer shell 101 has an upward-opening rectangular trough structure to form a water collection area. The top of the outer shell 101 extends horizontally outward along the circumference of the outer shell 101 to form a mounting flange. This mounting flange is not only used to support the edge of the pre-drilled hole in the ground for the entire device, but also serves as the main force-bearing connection point for fixing the assembly 3, and is used to withstand and transmit the upward thrust generated by the backflow water pressure. The base plate 102 closes the bottom of the outer shell 101 and provides a connection base for the components below.

[0026] The anti-backflow component 2 includes a hollow first outer shell 202, which serves as the main shell of the valve body. Inside the first outer shell 202, there is a cavity for accommodating the valve core and through which water flows. One axial end of the first outer shell 202 is fixedly connected to a water inlet pipe 201. The water inlet pipe 201 has a bent pipe structure and its inlet end passes vertically upward through the bottom plate 102 and extends into the interior of the outer shell 101, so that the water collected by the water tank component 1 can directly enter the water inlet pipe 201. The other axial end of the first outer shell 202 is fixedly connected to a water outlet pipe 203, which is used to guide the water flowing through the first outer shell 202 to the external drainage system.

[0027] To achieve the anti-dislodgement function of the device under extreme working conditions, the fixing component 3 includes a fixing block 301 fixedly installed or fastened to the outer wall of the outer shell 101 and the mounting flange, a barb 303 for deep embedding and anchoring to the wall around the drain outlet and having multiple barbs, and a hanging rod 302 connecting the fixing block 301 and the barb 303. The hanging rod 302 serves as an intermediate force transmission component, with its two ends detachably connected to the fixing block 301 and the barb 303, respectively. Through this split connection structure, the barb 303 can be pre-embedded in the wall and then tightened to the main structure through the hanging rod 302, thereby effectively transmitting the huge water pressure thrust of the valve body to the depth of the wall and using the reaction force of the wall to lock the device in place.

[0028] The valve core located inside the first housing 202 includes a check valve 204 and a second housing 205 that is fixedly connected to or integrally formed with the check valve 204. The second housing 205 has a rearward-opening receiving cavity that accommodates and protects part of the main body of a spring 206. One end of the spring 206 extends into the receiving cavity and abuts against the bottom of the cavity, while the other end extends out of the second housing 205 and abuts against a bracket 207 fixed to the rear end of the first housing 202. The bracket 207 is fixed inside the first housing 202 near the end of the outlet pipe 203. A through hole is provided on 207 for water to flow through. Through this embedded spring mounting structure, the side wall of the second housing 205 restricts the lateral bending of the spring 206, ensuring that the spring 206 always applies a stable thrust along the axial direction. A plane perpendicular to the axis is formed on the outlet end face of the water inlet pipe 201 located inside the first housing 202. An annular sealing gasket is fixed on the front end face of the second housing 205 facing the water inlet pipe 201. In the absence of water pressure or back pressure, the spring 206 pushes the second housing 205 and the annular sealing gasket to fit tightly against the outlet end face of the water inlet pipe 201 to form an initial seal.

[0029] Meanwhile, multiple raised guide ribs are evenly distributed along the axial direction on the inner wall of the first outer shell 202. The outer wall surface of the second outer shell 205 and the top surface of the guide ribs form a sliding fit. In the assembled state, the valve core moves back and forth along the axis of the first outer shell 202 under the constraint of the guide ribs through the second outer shell 205. This line contact support structure constructed by the guide ribs not only reduces the frictional resistance when the valve core moves, preventing the valve core from rotating circumferentially or getting stuck, but also the gap between two adjacent guide ribs directly forms a flow channel, so that when the water pressure of the inlet pipe 201 opens the valve core, the water flow can smoothly flow along the flow channel around the second outer shell 205 to the outlet pipe 203 behind.

[0030] As a preferred embodiment, to address the technical problem that the barb 303 needs to shrink during installation to facilitate insertion into the pre-drilled hole and needs to open in the working state to provide anchoring force, please refer to... Figure 4 The barb 303 includes a central rod and several spikes hinged to the periphery of the central rod. A storage groove for accommodating the spikes is provided on the side wall of the central rod. The root of the spike is rotatably connected to the storage groove by a pin. The spike can rotate relative to the central rod to fold and store in the storage groove or open outward. During installation, storing the spike in the storage groove reduces the overall radial dimension of the barb 303, making it easier for the barb 303 to penetrate into the pre-drilled hole in the wall. When the barb 303 is in place, the spike rotates outward around the pin under gravity or external operation and opens and penetrates into the wall medium, forming a self-locking anchoring effect similar to an expansion bolt.

[0031] As another preferred embodiment, in order to facilitate the installation and disassembly of the fixing component 3 and ensure the reliability of force transmission, one end of the hanging rod 302 is formed as an L-shaped hook that cooperates with the fixing block 301, and the other end of the hanging rod 302 is formed as a plug-in part that plugs into the plug hole provided on the barb 303. The top end of the fixing block 301 is hooked onto the mounting flange of the outer shell 101. During installation, it is only necessary to hook the hook of the hanging rod 302 onto the fixing block 301 and insert the plug-in part into the plug hole of the barb 303 to complete the connection. This structure uses the mounting flange as the bearing surface and forms a complete mechanical transmission chain through the fixing block 301, the hanging rod 302, and the barb 303, which converts the backflow water pressure into tensile force and is ultimately borne by the wall.

[0032] As another preferred embodiment, in order to enhance the overall strength and consistency of the valve core structure, the check valve 204 and the second housing 205 are integrally formed, avoiding the risk of loose connection that may exist in the separate structure. Moreover, the check valve 204 and the second housing 205 slide as a whole within the first housing 202. This integrated design simplifies the assembly process and improves the reliability of moving parts.

[0033] As a further preferred embodiment, in order to ensure that the spring 206 can stably apply axial thrust and reduce flow resistance, the bracket 207 includes a fixing ring and a support seat disposed at the center of the fixing ring. The fixing ring is fixedly connected to the inner wall of the first housing 202 near the end of the water outlet pipe 203. The fixing ring has multiple through holes to allow water to flow to the water outlet pipe 203. The support seat provides a support base surface for the spring 206 facing the center of the valve core, ensuring that the spring force is always transmitted along the axis.

[0034] As an optimized sealing performance solution, an annular sealing gasket is fixed on the end face of the check valve 204 facing the water inlet pipe 201. The annular sealing gasket is preferably made of elastic rubber material to ensure a good watertight seal with the inlet of the water inlet pipe 201 when the valve is closed. The water inlet pipe 201 has a bent pipe structure, and the outlet end face of the bent pipe inside the first housing 202 is perpendicular to the axis of the first housing 202, providing a flat pressing surface for the annular sealing gasket.

[0035] Working principle: Under normal drainage conditions, the accumulated water in the substation flows into the outer shell 101 of the water tank assembly 1 and enters the lower water inlet pipe 201 through the opening on the bottom plate 102. When the thrust generated by the water pressure in the water inlet pipe 201 is greater than the preload of the spring 206 on the valve core, the water flow pushes the valve core, including the check valve 204 and the second shell 205, to overcome the resistance of the spring 206 and slide backward along the guide rib on the inner wall of the first shell 202. At this time, the spring 206 is compressed and housed in the receiving cavity of the second shell 205. The annular sealing gasket at the front end of the second shell 205 separates from the opening of the water inlet pipe 201, the valve opens, and the water flows through the flow passage between the adjacent guide ribs and around the valve core, and finally is discharged from the outlet pipe 203. When backflow of water occurs from the outside, the water flows in reverse from the outlet pipe 203 into the cavity of the first outer shell 202. The backflow water pressure acts directly on the back surface of the valve core. This pressure, combined with the reset elastic force of the spring 206, pushes the valve core forward and reset quickly along the guide rib, so that the annular sealing gasket on the second outer shell 205 is pressed tightly against the vertical end face of the inlet pipe 201. The high-pressure seal is formed by the water pressure self-locking effect, which effectively prevents water from flowing back into the substation. When encountering extreme backflow water pressure that generates a huge thrust sufficient to push the entire valve device upward, the fixing component 3 plays an anchoring role. The huge upward thrust acts on the outer shell 101 and the mounting flange, and is transmitted to the hanging rod 302 through the fixing block 301. The hanging rod 302 further transmits the tension to the barbs 303 that have been anchored in the wall around the drain outlet by multiple barbs. Since the barbs 303 have deeply penetrated into the wall medium, the wall provides a strong reaction tension through the barbs 303. This tension counteracts the upward thrust generated by the backflow water pressure, firmly locking the entire valve device in its original installation position and preventing the device from being washed away due to excessive water pressure.

Claims

1. A one-way check valve for a substation drainage outlet to prevent backflow, comprising: A water tank assembly (1) includes an outer shell (101) and a bottom plate (102) fixed to the bottom of the outer shell (101). Anti-backflow assembly (2), the anti-backflow assembly (2) includes a hollow first shell (202), one axial end of the first shell (202) is fixedly connected to an inlet pipe (201) that passes upward through the base plate (102), and the other axial end of the first shell (202) is fixedly connected to an outlet pipe (203). A valve core is slidably disposed in the cavity of the first housing (202) along the axial direction of the first housing (202). The valve core includes a check valve (204) and a second housing (205) for sealing the inlet of the water inlet pipe (201). A bracket (207) is fixedly disposed within the cavity of the first outer casing (202). The bracket (207) is located between the valve core and the water outlet pipe (203). A spring (206) is disposed inside the valve core, with one end of the spring (206) abutting against the valve core and the other end abutting against the bracket (207). The characteristic feature is that... The valve also includes a fixing component (3), which includes a fixing block (301) fixed to the outer wall of the outer shell (101), barbs (303) for anchoring to the wall around the drain outlet and having multiple barbs, and a hanging rod (302). The two ends of the hanging rod (302) are detachably connected to the fixing block (301) and the barbs (303), respectively.

2. A one-way check valve for a substation drainage outlet to prevent backflow, as described in claim 1, is characterized in that... The barb (303) includes a central rod and a plurality of barbs hinged to the periphery of the central rod. A storage groove for accommodating the barbs is provided on the side wall of the central rod. The root of the barb is rotatably connected to the storage groove by a pin, so that the barb can rotate relative to the central rod to fold and store in the storage groove or open outward.

3. A one-way check valve for a substation drainage outlet to prevent backflow, as described in claim 1, is characterized in that... One end of the hanging rod (302) is formed as a hook that cooperates with the fixing block (301), and the other end of the hanging rod (302) is formed as a plug-in part that plugs into the plug-in hole provided on the barb (303).

4. A one-way check valve for a substation drainage outlet to prevent backflow, as described in claim 1, characterized in that, The second housing (205) has a rearward-opening receiving cavity inside, one end of the spring (206) extends into the receiving cavity and abuts against the bottom of the receiving cavity, and the other end of the spring (206) abuts against the end face of the bracket (207).

5. A one-way check valve for a substation drainage outlet to prevent backflow, as described in claim 1, characterized in that, The inner wall of the first outer shell (202) is evenly distributed with a number of guide ribs along the axial direction. The outer wall of the second outer shell (205) is slidably engaged with the guide ribs, and a flow channel for water to flow through is formed between adjacent guide ribs.

6. A one-way check valve for a substation drainage outlet to prevent backflow, as described in claim 1, characterized in that, The water inlet pipe (201) has a bent pipe structure, and its outlet end face located inside the first housing (202) is perpendicular to the axis of the first housing (202). The front end face of the second housing (205) is provided with a sealing gasket that cooperates with the outlet end face. The sealing gasket is attached to the outlet end face under the pre-tightening force of the spring (206).

7. A one-way check valve for a substation drainage outlet to prevent backflow, as described in claim 1, characterized in that, The top of the outer shell (101) extends outward along its circumference to form a mounting flange, and the top of the fixing block (301) is hooked onto the upper surface of the mounting flange to transmit the force generated by the backflow water pressure to the hanging rod (302).

8. A one-way check valve for a substation drainage outlet to prevent backflow, as described in claim 1, characterized in that, The bracket (207) includes a fixing ring and a support seat disposed at the center of the fixing ring. The fixing ring is fixedly connected to the inner wall of the first outer shell (202) near the end of the water outlet pipe (203). The fixing ring has multiple through holes to allow water to flow to the water outlet pipe (203).

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