Diaphragm valve
By designing a diaphragm valve that uses elastic diaphragm and sealing ring, the leakage problem caused by foreign matter is solved, and the sealing property is maintained through the restoration of the elastic material, avoiding the stickiness of the pinch valve.
Patent Information
- Application Number
- CN202421624725.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-10
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-07-10
AI Technical Summary
Existing diaphragm valves are prone to leakage problems when foreign objects exist, and the pinch valves have problems with the pipeline sticking after a long time.
A diaphragm valve is designed, which uses a combination of elastic diaphragm and sealing ring. The elastic diaphragm is driven downward through the driving device, and the sealing ring is crimped to close the runner. When the diaphragm valve is turned on again, the remaining foreign matter will be washed away, and the sealing component will return to its original state and maintain its sealing properties.
It effectively avoids leakage problems caused by foreign objects, and maintains sealing through the restoration of elastic materials, avoiding stickiness of pinch valves.
Smart Images
Figure CN222880402U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of valves, in particular to a diaphragm valve. Background Art
[0002] Valves are control components in fluid delivery systems, with functions such as shutoff, regulation, flow diversion, backflow prevention, pressure stabilization, flow diversion or overflow pressure relief. Valves used in fluid control systems come in a wide variety of varieties and specifications, from the simplest shutoff valve to the various valves used in extremely complex automatic control systems. Valves can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media, while diaphragm valves are shutoff valves that use elastic diaphragms as opening and closing parts to close the flow channel, cut off the fluid, and separate the inner cavity of the valve body from the inner cavity of the valve cover.
[0003] In the prior art, the connection between the valve seat and the valve body sealing part in a diaphragm valve is usually composed of plastic materials such as metal and resin, and the crimping seal is driven by a driving device. When foreign matter harder than the plastic material enters the valve seat, the plastic material will undergo plastic deformation. Even if the foreign matter is removed, the deformation at the connection will cause certain leakage, affecting the normal use of the valve. As for the pinch valve, although it has strong resistance to foreign matter, there is a problem of pipeline sticking after a long time. Utility Model Content
[0004] In order to overcome the above disadvantages, the purpose of the present invention is to provide a diaphragm valve to solve the problems caused by the above background technology.
[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is a diaphragm valve, comprising:
[0006] The driving part extends along the axial direction and includes a driving device.
[0007] The valve seat portion is arranged below the driving portion, and is provided with an inlet end and an outlet end on both sides along the radial direction.
[0008] The reserved interval is arranged between the driving part and the valve seat part, and is respectively connected with the inlet end through an inlet pipe and connected with the outlet end through an outlet pipe, so as to allow the fluid to flow from the inlet end through the reserved interval and out from the outlet end.
[0009] The sealing assembly comprises a first sealing ring, a second sealing ring and an elastic diaphragm. The first sealing ring is sleeved on the top of the inlet pipe, the second sealing ring is sleeved on the top of the outlet pipe, the elastic diaphragm extends along the radial direction and is arranged in the reserved interval, and is used to drive the elastic diaphragm to move downward along the axial direction relative to the valve seat portion through the driving device, so as to be pressed with the first sealing ring and the second sealing ring to close the inlet pipe and the outlet pipe, and the radial direction is perpendicular to the axial direction.
[0010] The diaphragm valve provided by the utility model, when the diaphragm valve is turned on, the fluid containing foreign matter flows through the reserved interval, and when the diaphragm valve is turned off, the driving device drives the elastic diaphragm to move downward to be crimped with the first sealing ring and the second sealing ring, and part of the foreign matter remains on the sealing surface between the elastic diaphragm and the first sealing ring and the second sealing ring, and when the diaphragm valve is turned on again, the remaining foreign matter will be washed away, and the traces of the foreign matter are restored to their original shapes due to the use of elastic materials, and the first sealing ring, the second sealing ring and the elastic diaphragm are restored to their original shapes, and the sealing performance after the foreign matter is removed will not be affected, thereby avoiding leakage.
[0011] In some embodiments, the driving device is an electromagnet, and the electromagnet includes a moving iron core and a solenoid valve coil. The moving iron core extends along the axial direction, and the bottom is connected to the elastic diaphragm. The solenoid valve coil is arranged around the moving iron core, and is used to attract the moving iron core upward along the axial direction when the solenoid valve coil is energized.
[0012] By adopting the above technical solution, the power supply of the electromagnet driver is turned on and off, so that the moving iron core performs corresponding adsorption and release actions: when the solenoid valve coil is energized, the moving iron core is magnetized, and the moving iron core drives the elastic diaphragm to be attracted upward at the same time, and the diaphragm valve is turned on; when the solenoid valve coil is de-energized, the moving iron core and the diaphragm move downward at the same time until they are crimped with the first sealing ring and the second sealing ring, and the diaphragm valve is closed.
[0013] In some embodiments, a fixing block is provided at the bottom of the moving iron core, and a groove corresponding to the position of the fixing block is provided at the top of the elastic diaphragm for being clamped and fixed with the fixing block.
[0014] In some embodiments, along the radial direction, the projection of the fixing block and the projection of the groove are both in an inverted T shape.
[0015] Using the above technical solution, unlike the pinch valve, the elastic diaphragm in the device is synchronously driven with the moving iron core, so even if the elastic diaphragm is combined with the sealing surface of the first sealing ring and the second sealing ring, the elastic diaphragm can be physically peeled off by the strong adsorption force of the electromagnet. Furthermore, the elastic diaphragm is also connected to the bottom of the moving iron core by hook connection, adhesive material connection or thread connection to enhance the fixing effect.
[0016] In some embodiments, a spring is provided inside the moving iron core for elastically contracting when the moving iron core moves upward, and when the solenoid valve coil is powered off, the iron core is pushed downward by elastic potential energy.
[0017] In some embodiments, the first sealing ring and the second sealing ring are both embedded in the top of the valve seat portion.
[0018] In some embodiments, the first sealing ring, the second sealing ring and the elastic diaphragm are made of one of silicone, fluororubber or EPDM.
[0019] With the above technical solution, the sealing components are made of elastic materials such as silicone, fluororubber or EPDM. Even if foreign matter enters the diaphragm valve, the sealing performance can still be maintained because the shape of the sealing component can be elastically restored. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 This is a cross-sectional view of an embodiment of a diaphragm valve of the utility model, wherein the first sealing ring is not shown;
[0021] Figure 2 for Figure 1 The enlarged view of point A in the middle;
[0022] In the figure:
[0023] 1- diaphragm valve; 2- driving part; 20- driving device; 21- moving iron core; 22- electromagnetic valve coil; 23- spring; 24- fixing block; 3- valve seat; 30- inlet end; 31- outlet end; 32- inlet pipe; 33- outlet pipe; 4- reserved interval; 50- first sealing ring; 51- elastic diaphragm. DETAILED DESCRIPTION
[0024] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.
[0025] refer to Figure 1 and Figure 2 , Figure 1 A cross-sectional view of a diaphragm valve 1 provided by an embodiment of the utility model is shown, wherein the first sealing ring 50 is not shown; Figure 2 for Figure 1 Enlarged view of point A in the middle.
[0026] like Figure 1 and Figure 2 As shown, the technical solution adopted by the utility model is a diaphragm valve 1, including a drive part 2, a valve seat part 3, a reserved interval 4 and a sealing component, wherein:
[0027] The driving part 2 is axially ( Figure 1 The valve seat portion 3 is arranged below the driving portion 2 and extends in the radial direction ( Figure 1 The reserved interval 4 is provided between the driving part 2 and the valve seat part 3, and is respectively connected with the inlet end 30 through the inlet pipe 32 and the outlet end 31 through the outlet pipe 33, so that the fluid flows from the inlet end 30 through the reserved interval 4 and out of the outlet end 31.
[0028] The sealing assembly includes a first sealing ring 50, a second sealing ring and an elastic diaphragm 51. The first sealing ring 50 is sleeved on the top of the inlet pipe 32, the second sealing ring is sleeved on the top of the outlet pipe 33, and the elastic diaphragm 51 extends radially and is arranged in the reserved interval 4, and is used to drive the elastic diaphragm 51 to move downward in the axial direction relative to the valve seat portion 3 through the driving device 20, so as to press the first sealing ring 50 and the second sealing ring to close the inlet pipe 32 and the outlet pipe 33, and the radial direction is perpendicular to the axial direction.
[0029] The diaphragm valve 1 provided in the present application, when the diaphragm valve 1 is turned on, the fluid containing foreign matter flows through the reserved interval 4, and when the diaphragm valve 1 is turned off, the driving device 20 drives the elastic diaphragm 51 to move downward to be crimped with the first sealing ring 50 and the second sealing ring, and some foreign matter remains on the sealing surface between the elastic diaphragm 51 and the first sealing ring 50 and the second sealing ring. When the diaphragm valve 1 is turned on again, the remaining foreign matter will be washed away. Due to the use of elastic materials, the first sealing ring 50, the second sealing ring and the elastic diaphragm 51 return to their original shapes, and the sealing performance after the foreign matter is removed will not be affected, thereby avoiding leakage.
[0030] In some embodiments, reference Figure 1 and Figure 2 The driving device 20 is an electromagnet, which includes a moving iron core 21 and a solenoid valve coil 22. The moving iron core 21 extends axially, and the bottom is connected to the elastic diaphragm 51. The solenoid valve coil 22 is arranged around the moving iron core 21, and is used to attract the moving iron core 21 axially upward when the solenoid valve coil 22 is energized.
[0031] A spring 23 is provided inside the moving iron core 21 for elastically contracting when the moving iron core 21 moves upward. When the electromagnetic valve coil 22 is powered off, the iron core is pushed downward by elastic potential energy.
[0032] Exemplarily, by turning the power of the electromagnet driver on and off, the moving iron core 21 performs corresponding adsorption and release actions: the solenoid valve coil 22 is energized, the moving iron core 21 is magnetized, the moving iron core 21 drives the elastic diaphragm 51 to be attracted upward at the same time, and the diaphragm valve 1 is turned on; the solenoid valve coil 22 is de-energized, the elastic potential energy of the spring 23 inside the moving iron core 21 acts on the moving iron core 21, the moving iron core 21 and the diaphragm move downward at the same time until they are crimped with the first sealing ring 50 and the second sealing ring, and the diaphragm valve 1 is closed.
[0033] In some embodiments, reference Figure 1 and Figure 2 A fixing block 24 is provided at the bottom of the moving iron core 21 , and a groove corresponding to the position of the fixing block 24 is provided at the top of the elastic diaphragm 51 for being clamped and fixed with the fixing block 24 .
[0034] Along the radial direction, the projection of the fixing block 24 and the projection of the groove are both in an inverted T shape.
[0035] For example, unlike the pinch valve, the elastic diaphragm 51 in the present device is synchronously driven with the moving iron core 21, so even if the elastic diaphragm 51 is combined with the sealing surface of the first sealing ring 50 and the second sealing ring, the strong adsorption force of the electromagnet can physically peel off the elastic diaphragm 51. Furthermore, the elastic diaphragm 51 is also connected to the bottom of the moving iron core 21 by hook connection, adhesive material connection or threaded connection to enhance the fixing effect.
[0036] In some embodiments, reference Figure 1 and Figure 2 The first sealing ring 50 and the second sealing ring are both embedded in the top of the valve seat portion 3 .
[0037] In some embodiments, the first sealing ring 50 , the second sealing ring and the elastic diaphragm 51 are made of one of silicone, fluororubber or EPDM (Ethylene Propylene Diene Monomer).
[0038] For example, the sealing components are made of elastic materials such as silicone, fluororubber or EPDM. Even if foreign matter enters the diaphragm valve 1, the sealing performance can still be maintained because the shape of the sealing components can be elastically restored.
[0039] The above implementation modes are only for illustrating the technical concept and features of the utility model, and their purpose is to allow people familiar with this technology to understand the content of the utility model and implement it. It cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.
Claims
1. A diaphragm valve, characterized in that: include: A driving portion extending in the axial direction and comprising a driving device; A valve seat portion is disposed below the driving portion and is provided with an inlet end and an outlet end on both sides along the radial direction; A reserved interval is provided between the driving portion and the valve seat portion, and is respectively connected to the inlet end through an inlet pipe and to the outlet end through an outlet pipe, so that the fluid flows from the inlet end through the reserved interval and out of the outlet end; A sealing assembly comprises a first sealing ring, a second sealing ring and an elastic diaphragm; the first sealing ring is sleeved on the top of the inlet pipe, the second sealing ring is sleeved on the top of the outlet pipe, the elastic diaphragm extends along the radial direction and is arranged in the reserved interval, and is used to drive the elastic diaphragm to move downward along the axial direction relative to the valve seat portion through the driving device, so as to be crimped with the first sealing ring and the second sealing ring to close the inlet pipe and the outlet pipe, and the radial direction is perpendicular to the axial direction.
2. The diaphragm valve according to claim 1, characterized in that: The driving device is an electromagnet, which includes a moving iron core and a solenoid valve coil; the moving iron core extends along the axial direction, and the bottom is connected to the elastic diaphragm; the solenoid valve coil is arranged around the moving iron core, and is used to attract the moving iron core upward along the axial direction when the solenoid valve coil is energized.
3. The diaphragm valve according to claim 2, characterized in that: A fixing block is provided at the bottom of the moving iron core, and a groove corresponding to the position of the fixing block is provided at the top of the elastic diaphragm for being clamped and fixed with the fixing block.
4. The diaphragm valve according to claim 3, characterized in that: Along the radial direction, the projection of the fixing block and the projection of the groove are both in an inverted T shape.
5. The diaphragm valve according to claim 2, characterized in that: A spring is arranged inside the moving iron core for elastically contracting when the moving iron core moves upward, and when the solenoid valve coil is powered off, the iron core is pushed downward by elastic potential energy.
6. The diaphragm valve according to claim 1, characterized in that: The first sealing ring and the second sealing ring are both embedded in the top of the valve seat portion.
7. The diaphragm valve according to claim 1, characterized in that: The first sealing ring, the second sealing ring and the elastic diaphragm are made of one of silicone, fluororubber or EPDM.