High seal backflow preventing fire pump adapter

Abstract

The utility model discloses a kind of high sealing anti-reflux fire pump adapter, it is related to fire pump adapter technical field, the utility model includes adapter, the top of the adapter is provided with valve stem, one end of the valve stem is fixedly connected with hand wheel, the top of the adapter is provided with check valve, the top of the check valve is provided with interface cover, the side of the adapter is provided with safety valve, the utility model is cooperated between the valve clack, baffle and other components inside the anti-reflux assembly of isolation, realize the combination of valve clack, baffle and form the double anti-reflux structure of initiative closure, passive barrier, both rely on valve clack to block main stream backflow, and additional physical barrier is provided in valve clack side by baffle, substantially reduce the risk of leakage, baffle is automatically reset by spring extension link, can continuously close valve clack side surface, avoid the gap leakage of valve clack due to slight deformation or wear, enhance the sealing stability after long-term use.

Description

Technical Field

[0001] This utility model belongs to the technical field of waterproof pump couplings, and in particular relates to a high-sealing anti-backflow fire pump coupling. Background Technology

[0002] In building fire protection systems, water pump connections are key interfaces for emergency water supply, responsible for connecting external fire trucks to the indoor pipe network to supplement fire-fighting water sources. Traditional connections generally have insufficient sealing performance, making them prone to rainwater and impurities seeping in, causing valves to rust and become stuck. In addition, water backflow is prone to occur during fire water supply, reducing water supply pressure and reliability.

[0003] According to a public disclosure of a high-sealing fire pump connection (publication number: CN215136357U), it includes a pump connection body, a valve, a base, a connecting plate, a water outlet pipe, a cover, a primary closing device, a pressurizing device, and a secondary closing device. The valve passes through the middle of the top of the pump connection body.

[0004] In the aforementioned application, the cooperation between components such as valves and seats makes it difficult to form a dual anti-backflow structure that combines active closure and passive isolation. This structure relies on the valve disc to block the main backflow and also provides an additional physical barrier on the valve disc side through a baffle plate. The baffle plate automatically resets via a spring telescopic rod, ensuring it remains close to the valve disc side. This makes it difficult to form a dual anti-backflow structure that combines active closure and passive isolation, fails to provide an additional physical barrier, makes it difficult to significantly reduce the risk of leakage, and makes it difficult to prevent leakage from gaps caused by slight deformation or wear of the valve disc. This reduces the sealing stability after long-term use and requires improvement. Utility Model Content

[0005] The purpose of this utility model is to provide a high-sealing anti-backflow fire pump connector. By cooperating with the valve disc, baffle plate and other components inside the anti-backflow component, it solves the problem that the existing dual anti-backflow structure cannot form an active closure and passive blocking. It blocks the main backflow by the valve disc and provides an additional physical barrier on the valve disc side by the baffle plate. The baffle plate is automatically reset by the spring telescopic rod and can continuously stay close to the side of the valve disc.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] This utility model relates to a high-sealing anti-backflow fire pump coupling, comprising a coupling, a valve stem at the top of the coupling, a handwheel fixedly connected to one end of the valve stem, a check valve at the top of the coupling, an interface cover at the top of the check valve, a safety valve on the side of the coupling, and an anti-backflow baffle assembly on the inner wall of the check valve. The anti-backflow baffle assembly includes a rotating shaft, the circumferential surface of which is fixedly connected to the inner wall of the check valve, a valve disc rotatably connected to the circumferential surface of the rotating shaft, a support plate rotatably connected to the circumferential surface of the rotating shaft, a baffle plate fixedly connected to the side of the support plate, a connecting rod fixedly connected to the side of the baffle plate, and a spring telescopic rod fixedly connected to the inner wall of the check valve, the telescopic end of which is fixedly connected to one end of the connecting rod.

[0008] Furthermore, there are two connecting rods and spring telescopic rods, which are symmetrical to each other along the vertical central axis of the check valve. The presence of two connecting rods and spring telescopic rods facilitates the stable automatic reset of the baffle plate.

[0009] Furthermore, the baffle is located on the side of the valve disc and on the displacement trajectory of the valve disc. This design is beneficial because when the valve disc is impacted by water flow, it can automatically squeeze against the baffle and open automatically.

[0010] Furthermore, there are two check valves, which are symmetrical to each other along the vertical central axis of the connector. A connecting rope is provided on the side of the interface cover. The design of the connecting rope is conducive to connecting the two interface covers and preventing the two interface covers from being lost.

[0011] Furthermore, an embedded sealing assembly is provided on the inner wall of the check valve. The embedded sealing assembly includes a sealing strip, the circumferential surface of which is fixedly connected to the inner wall of the check valve. An embedded strip is fixedly connected to the side of the baffle plate. A connecting groove is provided on the side of the sealing strip. The sealing strip is embedded into the connecting groove through the embedded strip, so that the sealing strip is tightly connected to the baffle plate, further preventing water backflow.

[0012] Furthermore, the connecting groove is located on the side of the embedding strip and on the displacement trajectory of the embedding strip. This design allows the embedding strip to be directly embedded into the connecting groove when it moves.

[0013] Furthermore, the embedding strip is set in a semi-circular arc shape, and the connecting groove is also set in a semi-circular arc shape. This design helps to make the embedding strip and the connecting groove correspond to each other, resulting in a better connection and sealing effect.

[0014] This utility model has the following beneficial effects:

[0015] 1. This utility model achieves a dual anti-backflow structure by cooperating with the valve disc, baffle, and other components inside the anti-backflow assembly. The combination of the valve disc and baffle forms an active closure and passive blocking structure. The valve disc blocks the main backflow, while the baffle provides an additional physical barrier on the valve disc side, significantly reducing the risk of leakage. The baffle automatically resets via a spring telescopic rod, continuously keeping close to the side of the valve disc to prevent leakage from gaps caused by slight deformation or wear of the valve disc, thus enhancing the sealing stability after long-term use.

[0016] 2. This utility model achieves a mating structure between the embedded sealing strip and connecting groove through the mutual cooperation between the components such as the sealing strip and the connecting groove. This allows the baffle plate and the sealing strip to form a physical mating and tight fit, creating a double seal that eliminates gaps between them, prevents minor leakage, and achieves a higher level of sealing effect. Even when the pipeline pressure fluctuates, it can maintain a tight shielding state, reducing the risk of seal failure caused by vibration and pressure changes.

[0017] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional appearance structure diagram of the present utility model;

[0020] Figure 2 This is a three-dimensional top view of the safety valve structure of this utility model;

[0021] Figure 3 This is a three-dimensional side sectional view of the connector of this utility model;

[0022] Figure 4 This is a three-dimensional side sectional view of the valve disc of this utility model;

[0023] Figure 5 This is a three-dimensional side sectional view of the baffle plate of this utility model.

[0024] The attached diagram lists the components represented by each number as follows:

[0025] 1. Connector; 2. Valve stem; 3. Interface cover; 4. Handwheel; 5. Check valve; 6. Safety valve; 7. Backflow prevention assembly; 71. Shaft; 72. Valve disc; 73. Support plate; 74. Baffle plate; 75. Connecting rod; 76. Spring telescopic rod; 8. Embedded sealing assembly; 81. Sealing strip; 82. Embedded strip; 83. Connecting groove. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figures 1-5 As shown, this utility model is a high-sealing anti-backflow fire pump connector, including a connector 1, a valve stem 2 at the top of the connector 1, a handwheel 4 fixedly connected to one end of the valve stem 2, a check valve 5 at the top of the connector 1, an interface cover 3 at the top of the check valve 5, a safety valve 6 on the side of the connector 1, and an anti-backflow baffle assembly 7 on the inner wall of the check valve 5. The anti-backflow baffle assembly 7 includes a rotating shaft 71, the circumferential surface of the rotating shaft 71 is fixedly connected to the inner wall of the check valve 5, a valve disc 72 is rotatably connected to the circumferential surface of the rotating shaft 71, a support plate 73 is rotatably connected to the circumferential surface of the rotating shaft 71, a baffle plate 74 is fixedly connected to the side of the support plate 73, a connecting rod 75 is fixedly connected to the side of the baffle plate 74, and a spring telescopic rod 76 is fixedly connected to the inner wall of the check valve 5, with the telescopic end of the spring telescopic rod 76 fixedly connected to one end of the connecting rod 75.

[0028] There are two connecting rods 75 and spring telescopic rods 76, which are symmetrical to each other along the vertical central axis of the check valve 5. The presence of two connecting rods 75 and spring telescopic rods 76 facilitates the stable automatic reset of the baffle plate 74.

[0029] The baffle 74 is located on the side of the valve disc 72 and on the displacement trajectory of the valve disc 72. This design is beneficial because when the valve disc 72 is impacted by water flow, it can automatically squeeze the baffle 74 and open the baffle 74 automatically.

[0030] There are two check valves 5, which are symmetrical to each other along the vertical central axis of the connector 1. A connecting rope is provided on the side of the interface cover 3. The design of the connecting rope is conducive to connecting the two interface covers 3 and preventing the two interface covers 3 from being lost.

[0031] An embedded sealing assembly 8 is provided on the inner wall of the check valve 5. The embedded sealing assembly 8 includes a sealing strip 81. The circumferential surface of the sealing strip 81 is fixedly connected to the inner wall of the check valve 5. An embedded strip 82 is fixedly connected to the side of the baffle plate 74. A connecting groove 83 is opened on the side of the sealing strip 81. The sealing strip 82 is embedded into the connecting groove 83, so that the sealing strip 81 and the baffle plate 74 are tightly connected, further preventing water backflow.

[0032] The connecting groove 83 is located on the side of the embedded strip 82 and on the displacement trajectory of the embedded strip 82. This design is advantageous because the embedded strip 82 can be directly embedded into the connecting groove 83 when it moves.

[0033] The embedded strip 82 is set in a semi-circular arc shape, and the connecting groove 83 is also set in a semi-circular arc shape. This design helps to make the embedded strip 82 and the connecting groove 83 correspond to each other, so as to make the connection and sealing effect better.

[0034] One specific application of this embodiment is as follows: The connector 1 serves as the core carrier integrating all components. Under normal conditions, the interface cover 3 seals the interface and isolates impurities. The valve stem 2, linked to the interface cover 3 via a cable, ensures operational compliance. In emergency water supply situations, the interface cover 3 is first opened to connect the fire truck's water pipe. The handwheel 4 is then turned to open the internal passage. The external water source pressure pushes open the valve disc 72 of the check valve 5, allowing unidirectional water flow into the indoor pipe network. Simultaneously, the check valve 5 blocks the reverse flow of water to prevent backflow. The safety valve 6 monitors the pipe network pressure in real time. The system automatically releases pressure when overpressure occurs to prevent damage to connector 1 or the pipeline network. Through the coordinated operation of interface protection, on / off control, unidirectional flow restriction, and safe pressure relief, each component completes a closed-loop function of emergency water supply and safety protection, ensuring stable equipment operation. External water pressure opens the valve disc 72 of check valve 5. The baffle plate 74 is located on the side of valve disc 72 and along its movement trajectory. When valve disc 72 is opened by water flow, it squeezes against the baffle plate 74, causing the baffle plate 74 to move along the rotating shaft 71. Rotate upwards, moving away from the valve opening to expose it and allow water to enter. When no water source is connected, valve disc 72 is not impacted by water flow and continues to block the valve opening along the rotating shaft 71. Simultaneously, valve disc 72 stops pressing against baffle plate 74, which automatically resets via spring telescopic rod 76, moving closer to the side of valve disc 72. The baffle plate 74 provides additional clearance for valve disc 72, preventing backflow while simultaneously using valve disc 72 to prevent backflow. Continuous blocking enhances the backflow prevention effect. The combination of valve disc 72 and baffle 74 forms a dual backflow prevention structure that combines active closure and passive blocking. Valve disc 72 blocks the main backflow, while baffle 74 provides an additional physical barrier on the side of valve disc 72, significantly reducing the risk of leakage. Baffle 74 automatically resets via spring telescopic rod 76, continuously remaining close to the side of valve disc 72 to prevent leakage from gaps caused by slight deformation or wear of valve disc 72, thus enhancing the sealing stability after long-term use.

[0035] When the valve disc 72 is impacted by water flow, a sealing strip 81 is provided at the bottom of the sliding mechanism. When the baffle 74 moves closer to the side of the valve disc 72, it will drive the embedded strip 82 to move closer to the sealing strip 81. A corresponding connecting groove 83 is opened on the side of the sealing strip 81. When the embedded strip 82 moves closer to the sealing strip 81, it will be embedded into the connecting groove 83, so that the baffle 74 and the sealing strip 81 are tightly connected. This allows the baffle 74 to tightly cover the valve disc 72, further improving the backflow prevention effect. The fitting structure of the embedded strip 82 and the connecting groove 83 allows the baffle 74 and the sealing strip 81 to form a double seal of physical fitting and tight fit, eliminating gaps between the two, avoiding minor leakage, and achieving a higher level of sealing effect. The fitting structure makes the sealing connection between the baffle 74 and the valve disc 72 more secure. Even when the pipeline pressure fluctuates, it can maintain a tight covering state, reducing the risk of seal failure caused by vibration and pressure changes.

[0036] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0037] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A high-sealing anti-backflow fire pump coupling, comprising a coupling (1), characterized in that: The top of the connector (1) is provided with a valve stem (2), one end of which is fixedly connected to a handwheel (4). The top of the connector (1) is provided with a check valve (5), the top of the check valve (5) is provided with an interface cover (3), the side of the connector (1) is provided with a safety valve (6), and the inner wall of the check valve (5) is provided with a backflow prevention assembly (7). The backflow prevention assembly (7) includes a rotating shaft (71), the circumferential surface of which is fixedly connected to the inner wall of the check valve (5), a valve disc (72) is rotatably connected to the circumferential surface of the rotating shaft (71), a support plate (73) is rotatably connected to the circumferential surface of the rotating shaft (71), a baffle plate (74) is fixedly connected to the side of the support plate (73), a connecting rod (75) is fixedly connected to the side of the baffle plate (74), a spring telescopic rod (76) is fixedly connected to the inner wall of the check valve (5), and the telescopic end of the spring telescopic rod (76) is fixedly connected to one end of the connecting rod (75).

2. The high-sealing anti-backflow fire pump coupling according to claim 1, characterized in that, There are two connecting rods (75) and spring telescopic rods (76), which are symmetrical to each other along the vertical central axis of the check valve (5).

3. A high-sealing anti-backflow fire pump coupling according to claim 2, characterized in that, The baffle (74) is located on the side of the valve disc (72) and is located on the displacement trajectory of the valve disc (72).

4. A high-sealing anti-backflow fire pump coupling according to claim 3, characterized in that, Two check valves (5) are provided and are symmetrical to each other along the vertical central axis of the connector (1). A connecting rope is provided on the side of the interface cover (3).

5. A high-sealing anti-backflow fire pump coupling according to claim 4, characterized in that, An embedded sealing assembly (8) is provided on the inner wall of the check valve (5). The embedded sealing assembly (8) includes a sealing strip (81). The circumferential surface of the sealing strip (81) is fixedly connected to the inner wall of the check valve (5). An embedded strip (82) is fixedly connected to the side of the baffle plate (74). A connecting groove (83) is provided on the side of the sealing strip (81).

6. A high-sealing anti-backflow fire pump coupling according to claim 5, characterized in that, The connecting groove (83) is located on the side of the embedded strip (82), and the connecting groove (83) is located on the displacement trajectory of the embedded strip (82).

7. A high-sealing anti-backflow fire pump coupling according to claim 6, characterized in that, The embedded strip (82) is set in a semi-circular arc shape, and the connecting groove (83) is opened in a semi-circular arc shape.

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