Check valve body with bypass

Abstract

The utility model provides a check valve body with a bypass. The check valve body comprises a valve cavity, a valve port, a control cavity, a bypass channel and a control port. The valve port is communicated between one end face of the valve body and the valve cavity and can be opened or closed. The bypass channel is communicated between the valve port and the control cavity; the control port is communicated between one end of the control cavity and the valve cavity and can be opened or closed; wherein the liquid medium is provided with two flow guide paths in the valve body; in the first flow guide path, the valve port is opened, the control port is closed, and a liquid medium flows to the downstream of the valve body from the valve cavity; and in the second flow guide path, the valve port is closed, the control port is opened, and the liquid medium flows to the downstream of the valve body sequentially through the bypass channel, the control cavity and the valve cavity. The bypass channel is directly added to the valve body, the purpose of unloading the pressure of an upstream water hammer of the check valve is achieved, and a pipeline system is protected.

Description

Technical Field

[0001] The utility model relates to a check valve component, in particular to a check valve body with a bypass. Background Art

[0002] A check valve is a valve that automatically opens and closes the valve disc depending on the flow of the medium itself to prevent the medium from flowing back. It is widely used in suction devices such as water pumps.

[0003] When a check valve is used in a water pump, the pressure upstream of the check valve suddenly increases when the water pump stops, and the resulting water hammer effect poses a risk of damaging the check valve; or when the pipeline system is in a low-temperature environment such as in cold areas, the medium stops flowing when the water pump stops, causing the medium upstream of the check valve to freeze, posing a risk of damaging the pipeline system. Summary of the invention

[0004] In view of the deficiencies in the prior art, the utility model provides a check valve body with bypass, which directly adds a bypass channel on the valve body, which is conducive to combining the structure of the check valve with the switch valve, achieving the purpose of unloading the water hammer pressure upstream of the check valve, protecting the pipeline system, and at the same time, no additional separate valve body or pipeline is required, simplifying the pipeline system structure. The technical solution adopted by the utility model is:

[0005] A check valve body with bypass, used for guiding liquid medium, comprises a valve body, wherein the valve body comprises a valve cavity, a valve port, a control cavity, a bypass channel and a control port;

[0006] The valve port is connected between one end surface of the valve body and the valve cavity and can be opened or closed;

[0007] The bypass channel is connected between the valve port and the control chamber;

[0008] The control port is connected between one end of the control chamber and the valve chamber and can be opened or closed;

[0009] Wherein, the liquid medium has two flow-guiding paths in the valve body;

[0010] In the first flow-guiding path, the valve port is opened, the control port is closed, and the liquid medium flows from the valve cavity to the downstream of the valve body;

[0011] In the second flow guide path, the valve port is closed and the control port is opened, and the liquid medium flows to the downstream of the valve body through the bypass channel, the control chamber, and the valve chamber in sequence.

[0012] Further, the valve cavity extends along a first direction, the control cavity extends along a second direction, and the first direction is perpendicular to the second direction.

[0013] Advantages of the utility model:

[0014] The valve body adds a bypass channel and a control chamber to facilitate the combination of the switch valve and the check valve structure, realize the common valve body structure, unload the water hammer pressure generated upstream of the check valve without adding a new valve body or pipeline, prevent the medium upstream of the check valve from freezing, and achieve effective and low-cost protection of the entire piping system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structural composition of the utility model.

[0016] In the figure: 100 - valve body, 110 - valve chamber, 110a - first axis, 120 - valve port, 130 - control chamber, 130a - second axis, 140 - bypass channel, 150 - control port. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0018] Please see attached Figure 1 The utility model provides a check valve body with bypass, which is used for guiding liquid medium, including a valve body 100, wherein the valve body 100 includes a valve cavity 110, a valve port 120, a control cavity 130, a bypass channel 140 and a control port 150; the valve port 120 is connected between one end surface of the valve body 100 and the valve cavity 110 and can be opened or closed; the bypass channel 140 is connected between the valve port 120 and the control cavity 130; the control port 150 is connected between one end of the control cavity 130 and the The valve cavity 110 can be opened or closed; wherein the liquid medium has two flow guide paths in the valve body 100; in the first flow guide path, the valve port 120 is opened and the control port 150 is closed, and the liquid medium flows from the valve cavity 110 to the downstream of the valve body 100; in the second flow guide path, the valve port 120 is closed and the control port 150 is opened, and the liquid medium flows to the downstream of the valve body 100 through the bypass channel 140, the control cavity 130, and the valve cavity 110 in sequence.

[0019] In a specific embodiment, the opening or closing of the valve port 120 is passively achieved by opening the valve plate due to the pressure of the liquid medium itself, that is, the valve port 120 cooperates with the valve cavity 110 and the valve plate to form a check valve structure; when the water pump suddenly stops, the pressure of the liquid medium is 0, and the valve plate closes the valve port 120 by the reaction of the spring, and at this time the water hammer effect in the pipeline will act on the valve plate and the valve body 100.

[0020] The opening or closing of the control port requires active operation, that is, the control port 150, the control chamber 130, the valve chamber 110, the valve stem, and the sealing ring cooperate to form the structure of the switch valve; when it is necessary to eliminate the water hammer effect, just open the control port 150, thereby effectively protecting the pipeline system and the valve structure.

[0021] Furthermore, the cross-sectional size of the bypass channel 140 is smaller than that of the control chamber 130 , and the cross-sectional size of the control port 150 is smaller than that of the control chamber 130 , so that when the liquid medium enters the control chamber 130 from the bypass channel 140 , a buffer is achieved and then it is accelerated to flow into the valve chamber 110 through the control port 150 .

[0022] As an embodiment of the present application, in order to better arrange the components to be installed in the valve body 100, the valve cavity 110 extends along a first direction, and the control cavity 130 extends along a second direction, and the first direction is perpendicular to the second direction.

[0023] Specifically, the first direction is the front-to-back direction, and the first axis 110a of the valve chamber 110 is along the first direction; the second direction is the left-to-right direction, and the second axis 130a of the control chamber 130 is along the second direction; the space inside the valve chamber 110 is used to install components such as valve plates, springs, and valve stems, and the space inside the control chamber 130 is used to install components such as valve shafts and sealing pistons.

[0024] It should be noted that the position where the control port 150 is connected to the valve cavity 110 should be located downstream of the valve plate in the valve cavity 110 to ensure that the valve plate does not interfere with the control port 150 when it is open and does not affect the discharge of the liquid medium when it is closed.

[0025] In summary, the bypass channel and the control chamber are added to the valve body to realize the common structure of the valve body, and the water hammer pressure generated upstream of the check valve is unloaded without adding a new valve body or pipeline, thereby preventing the medium upstream of the check valve from freezing.

[0026] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to examples, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A check valve body with bypass, used for guiding liquid medium, comprising a valve body (100), characterized in that: The valve body (100) comprises a valve chamber (110), a valve port (120), a control chamber (130), a bypass channel (140) and a control port (150); The valve port (120) is connected between an end surface of the valve body (100) and the valve cavity (110) and can be opened or closed; The bypass channel (140) is connected between the valve port (120) and the control chamber (130); The control port (150) is connected between one end of the control chamber (130) and the valve chamber (110) and can be opened or closed; The liquid medium has two flow-guiding paths in the valve body (100); In the first flow-guiding path, the valve port (120) is opened, the control port (150) is closed, and the liquid medium flows from the valve cavity (110) to the downstream of the valve body (100); In the second flow guide path, the valve port (120) is closed and the control port (150) is opened, and the liquid medium flows to the downstream of the valve body (100) through the bypass channel (140), the control chamber (130), and the valve chamber (110) in sequence.

2. The check valve body with bypass according to claim 1, characterized in that: The valve chamber (110) extends along a first direction, and the control chamber (130) extends along a second direction, and the first direction is perpendicular to the second direction.

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