Anti-siphoning on-off delivery structure and valve

Abstract

The utility model provides a kind of anti-siphon on-off type conveying structure and valve, the anti-siphon on-off type conveying structure includes first conveying part, second conveying part and on-off body, the first conveying part has first conveying passage, the second conveying part has second conveying passage, the on-off body is equipped with intermediate conveying passage, the first end of the on-off body is connected with the first conveying part, the intermediate conveying passage is communicated with the first conveying passage;The on-off body is configured to have the tendency of moving away from the second conveying part by elastic force driving.The on-off body can realize the break isolation and contact communication between the first conveying part and the second conveying part, and can prevent medium siphon backflow;The anti-siphon on-off type conveying structure is reliable in function, simple in structure, does not affect the normal output of medium, has low requirement for production and processing and low cost;The valve with the anti-siphon on-off type conveying structure can stably prevent medium siphon backflow on the basis of low cost.

Description

Technical Field

[0001] This utility model relates to the field of media conveying device technology, and in particular to an anti-siphon on / off conveying structure and valve. Background Technology

[0002] Bathroom pipe network products need to prevent siphoning and backflow during media transportation. For example, they need to prevent toilet wastewater from flowing back into the municipal water supply network. Therefore, these products on the market have a backflow prevention structure. Currently, there are two main types of products:

[0003] One type of product adds a vacuum breaker at a suitable node in the pipeline network. When the pipeline system is under negative pressure, the vacuum breaker introduces outside air into the pipeline system, breaking the negative pressure and thus preventing siphoning that could cause medium backflow. However, the structure of the vacuum breaker limits its application to specific structural nodes. Furthermore, since the medium pipeline in the pipeline network remains connected, there is a risk of siphoning when the vacuum breaker fails.

[0004] Another type of product adds a separation distance to the medium pipeline, such as the backflow stopper with publication number CN203546865U. The two ends of the separation distance of this type of product are the output nozzle and the receiving hole, respectively. The medium pressure keeps the liquid medium in a bundle shape and sprays it out from the output nozzle, passing through the separation distance and entering the receiving hole to realize the medium transportation. When the medium flows back, the backflowing medium cannot maintain a bundle shape, so it cannot cross the separation distance to enter the output nozzle, thus having a high degree of safety against siphoning. However, this type of structure is complex. In order to ensure the uniformity of the medium during spraying, the manufacturing and processing requirements of its output nozzle and receiving hole are extremely high. Otherwise, medium scattering failures may easily occur during transportation. Therefore, it is necessary to make improvements. Utility Model Content

[0005] In view of this, this utility model proposes an anti-siphon on / off conveying structure and valve, aiming to solve the problem of medium siphon backflow using a simple structure.

[0006] The technical solution of the first aspect of this utility model is implemented as follows:

[0007] A siphon-resistant on / off conveying structure, comprising:

[0008] A first conveying unit, the first conveying unit having a first conveying channel;

[0009] A second conveying unit, the second conveying unit having a second conveying channel;

[0010] A switching body is provided with an intermediate conveying channel inside the switching body. The first end of the switching body is connected to the first conveying part, and the intermediate conveying channel is connected to the first conveying channel. The switching body is configured to be driven by elastic force and tend to move away from the second conveying part.

[0011] In its natural state, the second end of the switch body is separated from the second conveying part; when the switch body is subjected to medium pressure from the first conveying part, the second end of the switch body is connected to the second conveying part, and the intermediate conveying channel is connected to the second conveying channel.

[0012] As a further optional solution, an opening is provided between the first conveying part and the second conveying part. When the second end of the switch body is connected to the second conveying part, the second conveying channel is isolated from the opening; when the second end of the switch body is separated from the second conveying part, the second conveying channel is connected to the opening.

[0013] As a further alternative, the opening is connected to the outside atmosphere.

[0014] As a further optional solution, the first end of the switch body is slidably disposed in the first conveying channel, and a first sealing ring is provided between the first end of the switch body and the first conveying part; an elastic element is provided between the second end of the switch body and the second conveying part, and the elastic element provides the switch body with elastic force away from the second conveying part.

[0015] As a further optional solution, a second sealing ring is provided between the second end of the switching body and the second conveying part.

[0016] As a further alternative, the elastic element is a spring, one end of which abuts against the switch body, and the other end of which presses the second sealing ring onto the second conveying part;

[0017] The second end of the switch body is provided with a tapered connecting part, and the outer peripheral wall of the tapered connecting part is formed with a tapered inclined surface.

[0018] As a further optional solution, the switch body is a rubber component, comprising a switch body body, an elastic diaphragm, and a fixing ring; the switch body body is provided with the intermediate conveying channel, the elastic diaphragm is annular, the inner ring of the elastic diaphragm is disposed on the switch body body, and the outer ring of the elastic diaphragm is connected to the fixing ring; the elastic diaphragm provides elastic force to the switch body body away from the second conveying part; the fixing ring is sealed to the first conveying part.

[0019] As a further optional solution, the main body of the switch is cylindrical, and the outer wall of the second end of the main body of the switch has a first conical mating surface, and the inner wall of the end of the second conveying channel has a second conical mating surface for abutting and mating with the first conical mating surface.

[0020] As a further optional solution, auxiliary elastic components are also included;

[0021] The auxiliary elastic element is disposed at the first end of the switch body to apply an elastic force to the switch body to drive it closer to the second conveying part;

[0022] Alternatively, the auxiliary elastic element may be disposed at the second end of the switch body to apply an elastic force to the switch body to drive it away from the second conveying part.

[0023] The second aspect of this utility model is implemented as follows:

[0024] A valve comprising any of the above-mentioned anti-siphon on / off conveying structures.

[0025] The anti-siphon on / off conveying structure and valve of this application have at least the following advantages compared to the prior art:

[0026] This anti-siphon on-off conveying structure can be installed at any position in the medium pipeline. The on-off body can realize the separation and contact connection between the first conveying section and the second conveying section. When the medium siphons back, the on-off body will automatically disconnect from the second conveying section to prevent the medium from siphoning back. This anti-siphon on-off conveying structure is reliable, simple in structure, does not affect the normal output of the medium, has low requirements for production and processing, and is low in cost. Valves with this anti-siphon on-off conveying structure can reliably prevent the medium from siphoning back at a low cost. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0028] Figure 1 This is a schematic diagram of an anti-siphon on / off conveying structure in the connected state according to Embodiment 1 of this utility model;

[0029] Figure 2 This is a schematic diagram of an anti-siphon on / off conveying structure in the off state according to Embodiment 1 of this utility model;

[0030] Figure 3 This is a schematic diagram of an anti-siphon on / off conveying structure in the connected state according to Embodiment 2 of this utility model;

[0031] Figure 4 This is a schematic diagram of an anti-siphon on / off conveying structure in the off state according to Embodiment 2 of this utility model;

[0032] Figure 5 This is a schematic diagram of the structure of the on / off body in Embodiment 2 of this utility model;

[0033] Figure 6 This is a cross-sectional schematic diagram of a valve according to an embodiment of the present utility model.

[0034] In the diagram: 1. First conveying unit; 11. First conveying channel;

[0035] 2. Second conveying section; 21. Second conveying channel; 22. Second conical mating surface;

[0036] 3. Switch body; 31. Intermediate conveying channel; 32. Conical connecting part; 321. Conical inclined surface; 33. Main body of switch body; 331. First conical mating surface; 34. Elastic diaphragm; 35. Fixing ring;

[0037] 4. Opening;

[0038] 5. Elastic components;

[0039] 6. First sealing ring;

[0040] 7. Second sealing ring. Detailed Implementation

[0041] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0042] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0043] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0044] Example 1

[0045] refer to Figure 1-2 This utility model embodiment shows an anti-siphon on / off conveying structure, including a first conveying part 1, a second conveying part 2, and an on / off body 3; the first conveying part 1 has a first conveying channel 11; the second conveying part 2 has a second conveying channel 21; the on / off body 3 has an intermediate conveying channel 31, the first end of the on / off body 3 is connected to the first conveying part 1, and the intermediate conveying channel 31 is connected to the first conveying channel 11; the on / off body 3 is configured to be driven by elastic force and tend to move away from the second conveying part 2.

[0046] When the medium is being transported normally, the flow sequence of the medium is as follows: first transport channel 11, intermediate transport channel 31, and second transport channel 21.

[0047] like Figure 1 As shown, when the medium is being conveyed normally in the first conveying section 1, in order to provide medium pressure to the switch body 3, the medium pressure resists the elastic force on the switch body 3, causing the switch body 3 to move closer to the second conveying section 2. The second end of the switch body 3 is connected to the second conveying section 2, and the intermediate conveying channel 31 is connected to the second conveying channel 21, so that the medium can be output smoothly.

[0048] like Figure 2 As shown, when the medium pressure disappears or decreases, regardless of whether the medium pipeline is in a natural state or a negative pressure state, the switch body 3 moves away from the second conveying part 2 under the drive of the elastic force, and the second end of the switch body 3 separates from the second conveying part 2. Even if the medium flows back from the second conveying channel 21 under negative pressure, it cannot enter the intermediate conveying channel 31 or even the first conveying channel 11.

[0049] It should be noted that the first conveying part 1 and the second conveying part 2 can be two independent components, or they can be two parts of one component.

[0050] In some embodiments, an opening 4 is provided between the first conveying section 1 and the second conveying section 2. When the second end of the switching body 3 is connected to the second conveying section 2, the second conveying channel 21 is isolated from the opening 4; when the second end of the switching body 3 is separated from the second conveying section 2, the second conveying channel 21 is connected to the opening 4. The medium returning from the second conveying section 2 can flow into the opening 4 through the gap between the switching body 3 and the second conveying section 2.

[0051] The opening 4 can be connected to a container (not shown). When a medium siphon backflow occurs, the medium flows back to the opening 4 and is transported into the container.

[0052] The opening 4 can be connected to the outside atmosphere. The outside atmospheric pressure is introduced into the medium pipeline through the opening 4, which can prevent siphoning.

[0053] In this embodiment, as Figure 1 and Figure 2 As shown, the first end of the switch body 3 is slidably disposed in the first conveying channel 11, and a first sealing ring 6 is provided between the first end of the switch body 3 and the first conveying part 1 to ensure that the medium will not leak from the gap between the switch body 3 and the first conveying part 1; an elastic element 5 is provided between the second end of the switch body 3 and the second conveying part 2, and the elastic element 5 provides the switch body 3 with an elastic force away from the second conveying part 2.

[0054] In addition, a second sealing ring 7 is provided between the second end of the switch body 3 and the second conveying part 2. When the second end of the switch body 3 is connected to the second conveying part 2, the second sealing ring 7 ensures a sealed connection between the two to prevent the medium from leaking between the switch body 3 and the second conveying part 2.

[0055] Specifically, in the above scheme, the elastic element 5 is a spring, one end of the spring abuts against the switch body 3, and the other end of the spring presses the second sealing ring 7 onto the second conveying part 2.

[0056] Preferably, to reduce machining accuracy, the second end of the switch body 3 is provided with a tapered connecting portion 32, and the outer peripheral wall of the tapered connecting portion 32 is formed with a tapered inclined surface 321. Thus, by providing the tapered connecting portion 32, even if the switch body 3 vibrates or shakes during sliding under medium pressure, the tapered connecting portion 32 on the switch body 3 can still be inserted into the second sealing ring 7, ensuring stable contact between the switch body 3 and the second sealing ring 7.

[0057] In summary, the anti-siphon on-off conveying structure of this embodiment can be set at any position in the medium pipeline. The on-off body 3 can realize the separation and contact connection between the first conveying part 1 and the second conveying part 2. When the medium siphons back, the on-off body 3 will automatically disconnect from the second conveying part 2 to prevent the medium from siphoning back. This anti-siphon on-off conveying structure is reliable, simple in structure, does not affect the normal output of the medium, has low requirements for production and processing, and is low in cost.

[0058] Example 2

[0059] refer to Figure 3-5 This utility model embodiment shows an anti-siphon on / off conveying structure, including a first conveying part 1, a second conveying part 2, and an on / off body 3; the first conveying part 1 has a first conveying channel 11; the second conveying part 2 has a second conveying channel 21; the on / off body 3 has an intermediate conveying channel 31, the first end of the on / off body 3 is connected to the first conveying part 1, and the intermediate conveying channel 31 is connected to the first conveying channel 11; the on / off body 3 is configured to be driven by elastic force and tend to move away from the second conveying part 2.

[0060] Example 2 works on the same principle as Example 1, except that: the switch body 3 in Example 2 is a rubber component, which includes a switch body body 33, an elastic diaphragm 34, and a fixing ring 35; the switch body body 33 is provided with the intermediate conveying channel 31, the elastic diaphragm 34 is annular, the inner ring of the elastic diaphragm 34 is disposed on the switch body body 33, and the outer ring of the elastic diaphragm 34 is connected to the fixing ring 35; the elastic diaphragm 34 provides elasticity to the switch body body 33 away from the second conveying part 2; the fixing ring 35 is sealed to the first conveying part 1.

[0061] Thus, the first end of the switch body 3 can form a sealed connection with the first conveying part 1, and the second end of the switch body 3 can form a sealed connection with the second conveying part 2, eliminating the need for sealing components such as the first sealing ring 6 and the second sealing ring 7 as in Embodiment 1, making the structure simpler.

[0062] Furthermore, since the elastic diaphragm 34 provides elasticity, compared to Embodiment 1, the elastic element 5 can be omitted, resulting in a more optimized structure.

[0063] In some embodiments, an auxiliary elastic element (not shown) may also be provided.

[0064] For example, when the elastic force provided by the elastic diaphragm 34 is too strong, a relatively large medium pressure is required to connect the second end of the switch body 33 to the second conveying part 2. In this case, an auxiliary elastic element can be provided at the first end of the switch body 3. The auxiliary elastic element applies an elastic force to the switch body 3 to drive it closer to the second conveying part 2, thereby reducing the required medium pressure. The auxiliary elastic element can be a spring.

[0065] For example, when the elastic force provided by the elastic diaphragm 34 is insufficient, the separation between the switch body 3 and the second conveying part 2 will be unstable. In this case, an auxiliary elastic element can be provided at the second end of the switch body 3. The auxiliary elastic element applies an elastic force to the switch body 3 to drive it away from the second conveying part 2, thereby strengthening the power of the switch body 3 to move away from the second conveying part 2.

[0066] Specifically, to facilitate a stable and sealed connection between the switch body 33 and the second conveying section 2, the switch body 33 is cylindrical. A first conical mating surface 331 is formed on the outer wall of the second end of the switch body 33, and a second conical mating surface 22 is formed on the inner wall of the end of the second conveying channel 21 for abutting against the first conical mating surface 331. Thus, even if the switch body 33 vibrates or shakes under medium pressure, the first conical mating surface 331 ensures that the second end of the switch body 33 is stably inserted into the second conveying channel 21.

[0067] In addition, refer to Figure 6 This utility model also provides a valve, which includes any of the above-mentioned anti-siphon on / off conveying structures; the valve with the anti-siphon on / off conveying structure can reliably prevent the medium from siphoning back at a low cost.

[0068] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0069] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A siphon-proof on-off delivery structure, characterized by, include: A first conveying unit, the first conveying unit having a first conveying channel; A second conveying unit, the second conveying unit having a second conveying channel; A switching body is provided with an intermediate conveying channel inside the switching body. The first end of the switching body is connected to the first conveying part, and the intermediate conveying channel is connected to the first conveying channel. The switching body is configured to be driven by elastic force and tend to move away from the second conveying part. In its natural state, the second end of the switch body is separated from the second conveying part; when the switch body is subjected to medium pressure from the first conveying part, the second end of the switch body is connected to the second conveying part, and the intermediate conveying channel is connected to the second conveying channel.

2. The anti-siphon on / off conveying structure according to claim 1, characterized in that: An opening is provided between the first conveying part and the second conveying part. When the second end of the switch body is connected to the second conveying part, the second conveying channel is isolated from the opening. When the second end of the switch body is separated from the second conveying part, the second conveying channel is connected to the opening.

3. The anti-siphon on / off conveying structure according to claim 2, characterized in that: The opening is connected to the outside atmosphere.

4. The anti-siphon on / off conveying structure according to any one of claims 1-3, characterized in that: The first end of the switch body is slidably disposed in the first conveying channel, and a first sealing ring is provided between the first end of the switch body and the first conveying part; an elastic element is provided between the second end of the switch body and the second conveying part, and the elastic element provides the switch body with elastic force away from the second conveying part.

5. The anti-siphon on / off conveying structure according to claim 4, characterized in that: A second sealing ring is provided between the second end of the switch body and the second conveying part.

6. The anti-siphon on / off conveying structure according to claim 5, characterized in that: The elastic element is a spring, one end of which abuts against the switch body, and the other end of which presses the second sealing ring onto the second conveying part; The second end of the switch body is provided with a tapered connecting part, and the outer peripheral wall of the tapered connecting part is formed with a tapered inclined surface.

7. The anti-siphon on / off conveying structure according to any one of claims 1-3, characterized in that: The switch body is a rubber component, comprising a switch body body, an elastic diaphragm, and a fixing ring; the switch body body is provided with the intermediate conveying channel, the elastic diaphragm is annular, the inner ring of the elastic diaphragm is disposed on the switch body body, and the outer ring of the elastic diaphragm is connected to the fixing ring; the elastic diaphragm provides elastic force to the switch body body away from the second conveying part; the fixing ring is sealed and connected to the first conveying part.

8. The anti-siphon on / off conveying structure according to claim 7, characterized in that: The main body of the switch is cylindrical, and a first conical mating surface is formed on the outer wall of the second end of the main body of the switch. A second conical mating surface is formed on the inner wall of the end of the second conveying channel for abutting and mating with the first conical mating surface.

9. The anti-siphon on / off conveying structure according to claim 7, characterized in that: It also includes auxiliary elastic components; The auxiliary elastic element is disposed at the first end of the switch body to apply an elastic force to the switch body to drive it closer to the second conveying part; Alternatively, the auxiliary elastic element may be disposed at the second end of the switch body to apply an elastic force to the switch body to drive it away from the second conveying part.

10. A valve characterized by, It includes any one of the anti-siphon on / off conveying structures according to claims 1-9.

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