Magnetic conduction back pressure valve

Abstract

The utility model discloses a magnetic conduction back pressure valve which comprises a valve body and further comprises a magnetic conduction device detachably and fixedly connected to the upper portion of the valve body, and a movable valve plug is arranged in the valve body. The magnetic conduction device comprises an upper magnet and a lower magnet which mutually keep magnetic repulsive force, and the lower magnet is connected with the valve plug through a transmission rod; and when the pressure of the liquid flowing through the valve body is greater than the magnetic repulsive force applied to the valve plug by the magnetic conduction device, the valve body realizes circulation. According to the spring back pressure valve, the strong magnetic disk is adopted for pressure conduction, the problem that the precision of the spring back pressure valve is not accurate when high-temperature media are transmitted is solved, and high-precision operation in a high-temperature environment can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, and more specifically to a magnetic conduction back pressure valve. Background Art

[0002] Back-pressure valves are usually used to stabilize the flow rate of water pumps. If the flow rate of a pump varies significantly with pressure, a back-pressure valve is installed at the pump outlet to stabilize the pump's output flow rate. In addition, siphoning often occurs at the pump outlet due to gravity or other effects. In this case, a back-pressure valve can reduce the flow and pressure fluctuations caused by siphoning.

[0003] Existing back-pressure valves operate through the elastic force of a built-in spring. When the pipeline pressure is lower than the set pressure, the diaphragm blocks the pipeline under the action of the spring force. When the system pressure is higher than the set pressure, the diaphragm compresses the spring, connecting the pipeline and allowing liquid to flow through the back-pressure valve. When the pressure in the pipeline or equipment container is unstable, the back-pressure valve can maintain the required pressure in the pipeline, allowing the pump to output the normal flow rate. However, during daily operation, the flow of the transmission medium in the pipeline often causes vibration, causing the back-pressure valve to resonate and cause damage or increased wear. When transmitting high-temperature media, the pressure inside the back-pressure valve is mainly transmitted by the spring. However, prolonged high-temperature conditions will cause the spring's elastic potential energy to decrease, and the pressure accuracy of the back-pressure valve will lose control.

[0004] The existing publication number CN117108764A discloses a pressure-controlled back-pressure valve and its control method, in which a damping member is used to provide a magnetic attraction force and act on the valve core to push the valve plug against the valve body and close the liquid flow hole. The pressure regulating structure is used to adjust the magnitude of the magnetic attraction force on the valve core to adjust the closing pressure of the valve plug to close the liquid flow hole. The damping member provides a stable magnetic attraction force, thereby providing a stable closing pressure. The closing pressure effect can be adjusted under the action of the pressure regulating structure. The structure of the damping member and the valve core in the above-mentioned back-pressure valve is complex, the cost is high, and the assembly is inconvenient. For different use environments and pressure ranges of the fluid outlet, the models of the damping member and the valve core need to be replaced, which is very inconvenient.

[0005] Now we need a low-cost, easy-to-install, high-temperature-resistant, high-precision magnetic conduction back pressure valve to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide a magnetic conduction back pressure valve to overcome the above-mentioned defects in the prior art.

[0007] The technical solution for achieving the purpose of the utility model is: a magnetic conduction back pressure valve, including a valve body, and also including a magnetic conduction device that is detachably fixedly connected to the top of the valve body, and a movable valve plug is provided in the valve body; the magnetic conduction device includes an upper magnet and a lower magnet that maintain magnetic repulsion between each other, and the lower magnet is connected to the valve plug through a transmission rod; when the pressure of the liquid flowing through the valve body is greater than the magnetic repulsion exerted by the magnetic conduction device on the valve plug, the valve body achieves circulation.

[0008] As a preferred embodiment, the valve body is provided with an inner cavity, an inlet channel and an outlet channel, the inlet channel is connected to the bottom of the inner cavity, the bottom of the inner cavity is provided with a raised pipe mouth that cooperates with the valve plug, and the pipe mouth is connected to the outlet channel.

[0009] As a preferred embodiment, the magnetic conduction device further comprises a shell, and an adjustment component fixedly connected to the upper magnet is provided on the top of the shell, and the adjustment component can adjust the distance between the upper magnet and the lower magnet.

[0010] As a preferred embodiment, the shell is a non-magnetic metal shell.

[0011] As a preferred embodiment, the adjustment component is an adjustment screw.

[0012] As a preferred embodiment, a sleeve is provided on the outside of the transmission rod, and the sleeve is threadedly connected to the valve body and the housing respectively.

[0013] As a preferred embodiment, at least one support pad is provided in the sleeve, and the support pad can support the transmission rod to move axially in the sleeve.

[0014] As a preferred embodiment, the valve plug includes a soft diaphragm and a pipe plug, the soft diaphragm divides the inner cavity into an upper inner cavity and a lower inner cavity, and the pipe plug is matched with the size of the pipe orifice.

[0015] By adopting the above technical solution, the utility model has the following beneficial effects:

[0016] (1) The utility model uses a magnetic conduction device to conduct magnetic force, thereby realizing the opening and closing of the water inlet and outlet under different pressures of the valve body. The mechanical spring of the back pressure valve is eliminated, thereby avoiding the wear of the back pressure valve caused by vibration during the flow of pipeline media, and ensuring the stability of system operation.

[0017] (2) The utility model has an ingenious structure, is easy to install, and has a low installation cost.

[0018] (3) The utility model solves the problem of inaccurate precision of the spring back pressure valve when transmitting high-temperature media by adopting a strong magnetic disk as the pressure conductor, and can achieve high-precision operation in a high-temperature environment.

[0019] (4) The utility model realizes adjustment under different pressures through the adjustment component, and the operation is also relatively convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings, wherein

[0021] Figure 1 This is a plan view of the utility model.

[0022] Figure 2 It is a three-dimensional diagram of the upper magnet.

[0023] Figure 3 It is a three-dimensional diagram of the lower magnet.

[0024] Figure 4 A perspective view of the valve plug.

[0025] Figure 5 Exploded view between the lower magnet and the valve body.

[0026] The numbers in the accompanying drawings are: 1. valve body, 1-1. inner cavity, 1-2. water inlet channel, 1-3. water outlet channel, 1-4. pipe mouth; 2. magnetic conduction device, 2-1. upper magnet, 2-2. lower magnet, 2-3. shell, 2-4. adjusting assembly, 2-5. connecting rod, 2-6. upper magnet gasket; 3. valve plug, 3-1. soft diaphragm, 3-2. pipe plug; 4. transmission rod, 4-1. lower magnet gasket; 5. sleeve, 5-1. support pad. DETAILED DESCRIPTION

[0027] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0028] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0031] In the description of the embodiments of the present invention, it should be understood that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "setting", "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The present invention is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the scope of protection of the present invention.

[0033] (Example 1)

[0034] See Figure 1 and Figure 5 A magnetic conduction back pressure valve comprises a valve body 1, a magnetic conduction device 2 detachably fixedly connected to the top of the valve body 1, and a movable valve plug 3 is arranged in the valve body 1.

[0035] The valve body 1 is provided with an inner cavity 1-1, an inlet channel 1-2 and an outlet channel 1-3. The inlet channel 1-2 is connected to the bottom of the inner cavity 1-1. The bottom of the inner cavity 1-1 is provided with a raised pipe mouth 1-4 that cooperates with the valve plug 3. The pipe mouth 1-4 is connected to the outlet channel 1-3.

[0036] The magnetic conduction device 2 includes an upper magnet 2-1 and a lower magnet 2-2 that maintain magnetic repulsion against each other. The lower magnet 2-2 is connected to the valve plug 3 through a transmission rod 4. When the pressure of the liquid flowing through the valve body 1 is greater than the magnetic repulsion exerted by the magnetic conduction device 2 on the valve plug 3, the valve body 1 achieves circulation.

[0037] Furthermore, the magnetic conduction device 2 also includes a shell 2-3, and an adjustment component 2-4 fixedly connected to the upper magnet 2-1 is provided on the top of the shell 2-3. The adjustment component 2-4 can adjust the distance between the upper magnet 2-1 and the lower magnet 2-2.

[0038] Furthermore, the housing 2-3 is a non-magnetic metal shell, and the upper magnet 2-1 and the lower magnet 2-2 are made of neodymium iron boron permanent magnet material, which can maintain its performance at a high temperature of 400 degrees Celsius. The upper magnet 2-1 and the lower magnet 2-2 are placed with the same polarity to ensure that there is a mutual repulsive magnetic force between the upper magnet 2-1 and the lower magnet 2-2.

[0039] Furthermore, the adjustment component 2-4 can be an adjustment screw, which can be adjusted manually or by a motor or a drive device. The adjustment component 2-4 can also be a cylinder or a push rod to adjust the distance between the upper magnet 2-1 and the lower magnet 2-2.

[0040] Furthermore, a sleeve 5 is provided on the outside of the transmission rod 4, and the sleeve 5 is threadedly connected to the valve body 1 and the housing 2-3, respectively, making the installation of the device more convenient. At least one support pad 5-1 is provided inside the sleeve 5, and the support pad 5-1 can support the transmission rod 4 to move axially within the sleeve 5.

[0041] For further information, see Figure 4 The valve plug 3 includes a soft diaphragm 3-1 and a pipe plug 3-2. The soft diaphragm 3-1 separates the inner cavity 1-1 into an upper inner cavity and a lower inner cavity. The pipe plug 3-2 is matched with the size of the pipe mouth 1-4.

[0042] For further information, see Figure 2 and Figure 3 A connecting rod 2-5 is fixed above the upper magnet 2-1, and an upper magnet gasket 2-6 is fixedly connected to the top of the connecting rod. The lower magnet 2-2 includes a lower magnetic disk, a transmission rod 4, and a lower magnet gasket 4-1 fixedly connected to the bottom of the transmission rod 4; the lower end of the adjusting screw is connected to the upper magnet gasket, and the bottom of the lower magnet gasket 4-1 is connected to the upper end of the transmission rod 4.

[0043] The working principle of this embodiment is as follows:

[0044] The back-pressure valve's pressure is controlled by adjusting the adjusting screw at the top of the valve. As the adjusting screw is tightened, it exerts pressure on the upper magnet's gasket. This pressure is then transferred to the lower magnet through the repulsive force of like-pole magnets. The lower magnet, under pressure, transmits this pressure to the valve plug via a transmission rod. This interconnected pressure transmission is achieved from the upper adjusting screw to the lower valve plug.

[0045] When the back pressure valve adjusts the pressure greater than the pressure of the liquid, the soft diaphragm cannot be deformed. At this time, the back pressure valve is in an off-circuit state.

[0046] When the back pressure valve's regulating pressure is lower than the liquid's pressure, the soft diaphragm slowly bulges under the pressure of the liquid. At this time, the piston below the soft diaphragm deforms with the soft diaphragm, separating the pipe plug from the pipe mouth and opening the channel in the back pressure valve.

[0047] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A magnetic conduction back pressure valve, comprising a valve body (1), characterized in that: It also includes a magnetic conduction device (2) that is detachably fixedly connected to the upper part of the valve body (1), and a movable valve plug (3) is provided in the valve body (1); the magnetic conduction device (2) includes an upper magnet (2-1) and a lower magnet (2-2) that maintain a magnetic repulsion force against each other, and the lower magnet (2-2) is connected to the valve plug (3) via a transmission rod (4); when the pressure of the liquid flowing through the valve body (1) is greater than the magnetic repulsion force applied by the magnetic conduction device (2) to the valve plug (3), the valve body (1) is ventilated; The magnetic conduction device (2) further comprises a shell (2-3), the top of which is provided with an adjustment component (2-4) fixedly connected to the upper magnet (2-1), and the adjustment component (2-4) can adjust the distance between the upper magnet (2-1) and the lower magnet (2-2).

2. The magnetic conduction back pressure valve according to claim 1, characterized in that: The valve body (1) is provided with an inner cavity (1-1), a water inlet flow channel (1-2) and a water outlet flow channel (1-3); the water inlet flow channel (1-2) is communicated with the bottom of the inner cavity (1-1); the bottom of the inner cavity (1-1) is provided with a raised pipe mouth (1-4) that matches the valve plug (3); the pipe mouth (1-4) is communicated with the water outlet flow channel (1-3).

3. The magnetic conduction back pressure valve according to claim 1, characterized in that: The shell (2-3) is a non-magnetic metal shell.

4. The magnetic conduction back pressure valve according to claim 1, characterized in that: The adjusting component (2-4) is an adjusting screw.

5. The magnetic conduction back pressure valve according to claim 1, characterized in that: A sleeve (5) is provided on the outside of the transmission rod (4), and the sleeve (5) is threadedly connected to the valve body (1) and the housing (2-3) respectively.

6. The magnetic conduction back pressure valve according to claim 5, characterized in that: At least one support pad (5-1) is provided in the sleeve (5), and the support pad (5-1) can support the transmission rod (4) to move axially in the sleeve (5).

7. The magnetic conduction back pressure valve according to claim 2, characterized in that: The valve plug (3) comprises a soft diaphragm (3-1) and a pipe plug (3-2); the soft diaphragm (3-1) separates the inner cavity (1-1) into an upper inner cavity and a lower inner cavity; the pipe plug (3-2) is matched in size to the pipe orifice (1-4).

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