Anti-siphon on-off type conveying structure and valve

Abstract

The invention provides an anti-siphon on-off type conveying structure and a valve.The anti-siphon on-off type conveying structure comprises a first conveying part, a second conveying part and an on-off body, the first conveying part is provided with a first conveying channel, the second conveying part is provided with a second conveying channel, and a middle conveying channel is arranged in the on-off body; the first end of the on-off body is connected with the first conveying part, and the middle conveying channel is communicated with the first conveying channel; and the on-off body is configured to be driven by elastic force to have a trend of being far away from the second conveying part. The on-off body can achieve breaking isolation and contact communication between the first conveying part and the second conveying part, and siphon backflow of a medium can be prevented. The anti-siphon on-off type conveying structure is reliable in function and simple in structure, normal output of media is not affected, the requirement for production and machining is low, and cost is low; the valve with the anti-siphon on-off type conveying structure can stably prevent the medium from siphon backflow on the basis of low cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medium conveying devices, in particular to a siphon-proof on-off conveying structure and valve. BACKGROUND

[0002] In medium conveying, the bathroom pipe network product needs to prevent the occurrence of medium siphon and backflow phenomenon, for example, it is necessary to prevent the backflow of toilet sewage to the municipal water pipe network. Therefore, such products on the market have a backflow cutoff structure. At present, there are two main types of products:

[0003] One type of product adds a vacuum breaker at a suitable node of the pipe network. When the pipe network system is under negative pressure, the vacuum breaker introduces external atmosphere into the pipe network system to break the negative pressure, thereby avoiding the occurrence of siphon phenomenon leading to medium backflow. However, the structure of the vacuum breaker makes it only be able to be set at a specific structure node, and its application range is limited. Moreover, since the medium pipeline of the pipe network remains connected, when the vacuum breaker fails, there is a siphon risk.

[0004] Another type of product adds a segment of separation distance on the medium pipeline, for example, the backflow cutoff device disclosed in publication No. CN203546865U. The two ends of the separation distance of this type of product are an output nozzle and a receiving hole, respectively. Through the pressure of the medium, the liquid medium is maintained in a bundle shape and sprayed out of the output nozzle, passes through the separation distance and enters the receiving hole, realizing the conveying of the medium. When the medium backflows, the backflowing medium cannot maintain a bundle shape, thereby cannot pass through the separation distance and enter the output nozzle, thereby having high safety in preventing siphon. However, this type of structure is complex. In order to ensure the bundle property of the medium spray, the production and processing requirements of the output nozzle and the receiving hole are extremely high, otherwise the medium scattering fault conveying is easy to occur. Therefore, it is necessary to make improvements. SUMMARY

[0005] In view of this, the present application provides a siphon-proof on-off conveying structure and valve, aiming to solve the problem of medium siphon and backflow by using a simple structure.

[0006] The technical solution of the first aspect of the present application is as follows:

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

[0008] a first conveying part, the first conveying part having a first conveying channel;

[0009] a second conveying part, the second conveying part having a second conveying channel;

[0010] The on-off body is internally provided with an intermediate conveying channel, a first end of the on-off body is connected to the first conveying part, and the intermediate conveying channel is in communication with the first conveying channel; the on-off body is configured to be driven by elastic force and has a tendency to move away from the second conveying part.

[0011] In a natural state, the second end of the on-off body is separated from the second conveying part; when the on-off body is subjected to medium pressure from the first conveying part, the second end of the on-off body is connected to the second conveying part, and the intermediate conveying channel is in communication with 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 on-off body is connected to the second conveying part, the second conveying channel is in an isolated state from the opening; when the second end of the on-off body is separated from the second conveying part, the second conveying channel is in communication with the opening.

[0013] As a further optional solution, the opening is in communication with the external atmosphere.

[0014] As a further optional solution, the first end of the on-off body is slidingly arranged in the first conveying channel, a first sealing ring is provided between the first end of the on-off body and the first conveying part; an elastic member is provided between the second end of the on-off body and the second conveying part, and the elastic member provides the on-off body with elastic force to move away from the second conveying part.

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

[0016] As a further optional solution, the elastic member is a spring, one end of the spring abuts against the on-off body, and the other end of the spring presses the second sealing ring against the second conveying part.

[0017] The second end of the on-off body is provided with a tapered connecting part, and a tapered slope is formed on the outer peripheral wall of the tapered connecting part.

[0018] As a further optional solution, the on-off body is a rubber member, which includes an on-off body main part, an elastic diaphragm, and a fixing ring; the on-off body main part is provided with the intermediate conveying channel, the elastic diaphragm is annular, an inner ring of the elastic diaphragm is arranged in the on-off body main part, and an outer ring of the elastic diaphragm is connected to the fixing ring; the elastic diaphragm provides the on-off body main part with elastic force to move away from the second conveying part; and the fixing ring is sealingly connected to the first conveying part.

[0019] As a further optional solution, the on-off body is in a cylindrical shape, and an outer wall of the second end of the on-off body is formed with a first tapered matching surface, and an inner wall of an end portion of the second conveying channel is formed with a second tapered matching surface for abutting matching with the first tapered matching surface.

[0020] As a further optional solution, an auxiliary elastic member is further included;

[0021] The auxiliary elastic member is arranged at the first end of the on-off body to apply an elastic force to the on-off body to drive it to be close to the second conveying portion;

[0022] Or, the auxiliary elastic member is arranged at the second end of the on-off body to apply an elastic force to the on-off body to drive it to be away from the second conveying portion.

[0023] The technical solution of the second aspect of the present application is implemented as follows:

[0024] A valve including the anti-siphon on-off conveying structure of any one of the above.

[0025] The anti-siphon on-off conveying structure and the valve of the present application have at least the following beneficial effects relative to the prior art:

[0026] The anti-siphon on-off conveying structure can be arranged at any position in a medium pipeline, and the on-off body can realize the disconnection and isolation and the contact communication between the first conveying portion and the second conveying portion. When the medium siphons back, the on-off body is automatically disconnected from the second conveying portion to prevent the medium from siphoning back. The anti-siphon on-off conveying structure is reliable in function, simple in structure, does not affect the normal output of the medium, has low requirements on production and processing, and is low in cost. The valve with the anti-siphon on-off conveying structure can stably prevent the medium from siphoning back at a low cost. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0028] Figure 1 A schematic view of an anti-siphon on-off conveying structure in a connected state according to Embodiment One of the present application;

[0029] Figure 2 A schematic view of an anti-siphon on-off conveying structure in a disconnected state according to Embodiment One of the present application;

[0030] Figure 3A schematic view of a siphon-preventing on-off conveying structure in a connected state according to Embodiment Two of the present application;

[0031] Figure 4 A schematic view of a siphon-preventing on-off conveying structure in a disconnected state according to Embodiment Two of the present application;

[0032] Figure 5 A schematic view of a structure of an on-off body according to Embodiment Two of the present application;

[0033] Figure 6 A schematic view of a cross section of a valve according to Embodiment One of the present application.

[0034] In the figure: 1, first conveying part; 11, first conveying channel;

[0035] 2, second conveying part; 21, second conveying channel; 22, second conical matching surface;

[0036] 3, on-off body; 31, intermediate conveying channel; 32, conical connecting part; 321, conical inclined surface; 33, on-off body main body; 331, first conical matching surface; 34, elastic diaphragm; 35, fixing ring;

[0037] 4, opening;

[0038] 5, elastic member;

[0039] 6, first sealing ring;

[0040] 7, second sealing ring. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0042] In the description of the present application, it should be understood that the terms “upper”, “lower”, “front”, “back”, “vertical”, “horizontal”, “inner”, “outer” and the like indicate the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0043] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0044] Embodiment one

[0045] Reference Figures 1-2 The embodiment of the present application shows a siphon-proof on-off conveying structure, comprising 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 is provided with 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 communicates with the first conveying channel 11; the on-off body 3 is configured to be driven by elastic force and have a tendency to move away from the second conveying part 2.

[0046] Wherein, when the medium is normally conveyed, the flow sequence of the medium is in turn the first conveying channel 11, the intermediate conveying channel 31 and the second conveying channel 21.

[0047] As shown in Figure 1 When the medium is normally conveyed in the first conveying part 1, in order to provide the on-off body 3 with medium pressure, the medium pressure resists the elastic force received by the on-off body 3, so that the on-off body 3 is close to the second conveying part 2, the second end of the on-off body 3 is connected to the second conveying part 2, the intermediate conveying channel 31 communicates with the second conveying channel 21, so that the medium can be smoothly output.

[0048] As shown in Figure 2 When the medium pressure disappears or decreases, whether the medium pipeline is in a natural state or a negative pressure state, the on-off body 3 moves away from the second conveying part 2 under the driving of the elastic force, the second end of the on-off body 3 is separated 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 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 parts, or two parts in one part.

[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 the embodiment can be arranged at any position in the medium pipeline, the on-off body 3 can realize the disconnection and isolation and the contact communication between the first conveying part 1 and the second conveying part 2, when the medium siphon backflow occurs, the on-off body 3 is automatically disconnected with the second conveying part 2, thereby preventing the medium siphon backflow; the anti-siphon on-off conveying structure is reliable in function, simple in structure, does not affect the normal output of the medium, and is low in requirement for production and processing and cost.

[0058] Embodiment two

[0059] With reference to Figures 3-5 , the embodiment of the present application shows an anti-siphon on-off conveying structure, which comprises 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 is internally provided with an intermediate conveying channel 31, the first end of the on-off body 3 is connected with the first conveying part 1, and the intermediate conveying channel 31 is in communication with the first conveying channel 11; the on-off body 3 is configured to be driven by elastic force and has a tendency to move away from the second conveying part 2.

[0060] Embodiment two has the same working principle as embodiment one, and the difference lies in that the on-off body 3 in embodiment two is a rubber piece, which comprises an on-off body main body 33, an elastic diaphragm 34 and a fixing ring 35; the on-off body main 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 arranged on the on-off body main body 33, and the outer ring of the elastic diaphragm 34 is connected with the fixing ring 35; the elastic diaphragm 34 provides elastic force for the on-off body main body 33 to move away from the second conveying part 2; and the fixing ring 35 is sealingly connected with the first conveying part 1.

[0061] In this way, the first end of the on-off body 3 can be sealingly connected with the first conveying part 1, and the second end of the on-off body 3 can be sealingly connected with the second conveying part 2, without the need to arrange sealing components such as the first sealing ring 6 and the second sealing ring 7 in embodiment one, so that the structure is simpler.

[0062] In addition, the elastic force is provided by the elastic diaphragm 34, and compared with embodiment one, the elastic piece 5 can be omitted, and the structure is more optimized.

[0063] In some embodiments, an auxiliary elastic piece (not shown) can also be arranged.

[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 on-off body main part 33 to the second conveying part 2. In this case, an auxiliary elastic member can be arranged at the first end of the on-off body 3, which applies an elastic force to the on-off body 3 to drive it to approach the second conveying part 2, so as to reduce the required medium pressure. The auxiliary elastic member can be a spring.

[0065] 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 on-off body main part 33 to the second conveying part 2. In this case, an auxiliary elastic member can be arranged at the first end of the on-off body 3, which applies an elastic force to the on-off body 3 to drive it to approach the second conveying part 2, so as to reduce the required medium pressure. The auxiliary elastic member can be a spring.

[0066] In the above-mentioned solution, in order to stably seal and connect the on-off body main part 33 and the second conveying part 2, the on-off body main part 33 is in a cylindrical shape, and the outer wall of the second end of the on-off body main part 33 is formed with a first tapered matching surface 331, and the inner wall of the end of the second conveying channel 21 is formed with a second tapered matching surface 22 for abutting and matching with the first tapered matching surface 331. In this way, even if the on-off body main part 33 vibrates or shakes under the medium pressure, the first tapered matching surface 331 can stably insert the second end of the on-off body main part 33 into the second conveying channel 21.

[0067] In addition, with reference to Figure 6 The valve with the anti-siphon on-off conveying structure can stably prevent medium siphon backflow at a low cost.

[0068] In the above-mentioned embodiments, the description of each embodiment focuses on different aspects, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0069] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A siphon-resistant on-off conveying structure, characterized in that, 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 in that, It includes any one of the anti-siphon on / off conveying structures according to claims 1-9.

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