Safety valve for filter

Abstract

The utility model relates to the technical field of valves, in particular to a safety valve for a filter, which comprises a valve block with an adjusting switch, a pressure gauge connector, a liquid inlet connector and a liquid outlet connector are arranged on the valve block, and the liquid inlet connector and the liquid outlet connector are separated from each other. A diaphragm capable of elastically bulging concavely and convexly is arranged between the adjusting switch and the valve block in a sealing manner; a plug, a compression spring and a pressing disc are sequentially and coaxially arranged in the adjusting switch, the pressing disc abuts against the diaphragm, and the diaphragm is used for adjusting communication between the liquid inlet connector and the liquid outlet connector. The pressure gauge connector is communicated with the liquid inlet connector. The safety pressure borne by the diaphragm is adjusted through the plug, the compression spring and the pressure plate to be matched with the filter, and the pressure gauge connector is connected with the pressure gauge, so that the pressure change condition can be observed on site and adjusted; by completely unscrewing the plug, the liquid inlet connector and the liquid outlet connector are communicated under the action of fluid pressure to play a role of a drain valve, so that the overall use convenience is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a safety valve for a filter. Background Art

[0002] After existing single crystal silicon wafers are subjected to mechanical processing such as slicing and grinding, the damaged layer formed on the surface of the wafer due to processing stress is usually removed by chemical corrosion. For example, corrosion A is acidic corrosion, and a mixed acid solution is used to remove the damaged layer, producing hydrogen fluoride, NOX and waste mixed acid; corrosion B is alkaline corrosion, and a sodium hydroxide solution is used to remove the damaged layer, producing waste alkali liquid. These chemical waste liquids need to be pumped out to the filter for filtration using a centrifugal pump. For safety reasons, a diaphragm safety valve is usually installed on the connecting pipeline between the centrifugal pump and the filter to ensure that the filter operates under a safe pressure. The existing diaphragm safety valve generally includes a valve body, a diaphragm arranged in the valve body, and a driving mechanism for driving the movement of the diaphragm. It cannot intuitively reflect the fluid pressure in the valve body on site, nor can it adjust the size of the safety pressure according to the filter model; at the same time, when the filter is blocked, the diaphragm safety valve cannot play a role in draining liquid, which is easy to cause safety accidents such as filter leakage.

[0003] Therefore, it is urgent to design a safety valve that is easy to use and adjust to ensure the safe operation of the filter. Utility Model Content

[0004] The purpose of the utility model is to overcome the defects and shortcomings in the prior art. To this end, the utility model provides a safety valve for a filter, which can be connected to a pressure gauge and adjust the safety pressure according to the filter. At the same time, it can also be used as a drain valve to ensure the safe operation of the filter as a whole.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a safety valve for a filter, comprising a valve block with an adjusting switch, the valve block is provided with a pressure gauge joint and a liquid inlet joint and a liquid outlet joint separated from each other; a diaphragm that can elastically bulge is sealed between the adjusting switch and the valve block; a plug, a compression spring and a pressure plate are coaxially arranged in the adjusting switch in sequence, the pressure plate abuts against the diaphragm, the plug is configured to be threadedly rotated and adjust the size of the safety pressure that the diaphragm bears; the diaphragm is configured to adjust the connection between the liquid inlet joint and the liquid outlet joint; the pressure gauge joint is connected to the liquid inlet joint.

[0006] Furthermore, the regulating switch also includes a seat body bolted to the valve block, the plug, compression spring and pressure plate are all placed in the seat body; the pressure plate is slidably matched with the seat body; the plug is threadedly connected to the seat body; the diaphragm seal is pressed between the seat body and the valve block.

[0007] Furthermore, a guide shaft is integrally provided on the pressure plate, and the guide shaft coaxially slides through the plug; the compression spring is sleeved on the guide shaft.

[0008] Furthermore, a straight keyway is provided at the top of the plug.

[0009] Furthermore, the regulating switch also includes a knob threadedly sleeved on the top of the seat body, and the knob is provided with a flat key boss matching the key slot.

[0010] Furthermore, the diaphragm is a flexible rubber plate or PVDF plate; an annular protrusion is coaxially die-cast on the diaphragm, and the cross-section of the annular protrusion is arc-shaped; the direction of the annular protrusion is away from the plug; the pressure plate abuts against the diaphragm plane; the annular protrusion is located on the outside of the pressure plate.

[0011] Furthermore, the valve block is provided with a countersunk hole A coaxial with the plug, and a countersunk hole B is separated on one side of the countersunk hole A; the liquid inlet joint and the pressure gauge joint are both connected to the countersunk hole A; the liquid outlet joint is connected to the countersunk hole B; the diaphragm is configured so that when it abuts against the top of the countersunk hole A, the liquid inlet joint and the liquid outlet joint are not connected; when it is detached from the top of the countersunk hole A, the liquid inlet joint and the liquid outlet joint are connected.

[0012] Furthermore, the liquid inlet connector and the liquid outlet connector are coaxial with each other.

[0013] Furthermore, O-rings are provided between the diaphragm, the seat body and the valve block respectively.

[0014] Compared with the prior art, the utility model has the following beneficial effects: through the plug, compression spring and pressure plate, the safety size of the diaphragm can be adjusted in real time to match the corresponding filter; by loosening the plug, the inlet joint and the outlet joint are connected and the liquid is discharged, avoiding safety accidents caused by filter blockage; by connecting the pressure gauge through the pressure gauge joint, the pressure change can be observed on site and the pressure can be adjusted. The whole can not only realize the role of a safety valve, but also play the role of a liquid discharge valve, improving the overall convenience and adjustability of use, and ensuring the safe operation of the filter. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0016] Figure 2 It is a cross-sectional schematic diagram of the utility model.

[0017] Figure 3 It is a directional view of the plug in the utility model.

[0018] Among them: 1. Valve block; 2. Adjustment switch; 11. Liquid inlet connector; 12. Liquid outlet connector; 13. Pressure gauge connector; 14. Countersunk hole A; 15. Countersunk hole B; 21. Seat; 22. Knob; 23. Plug; 24. Guide shaft; 25. Compression spring; 26. Keyway. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element 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.

[0021] Example

[0022] See also Figures 1 to 3 The utility model provides a safety valve for a filter, comprising a valve block 1 with an adjusting switch 2, the valve block 1 being provided with a pressure gauge joint 13 and a liquid inlet joint 11 and a liquid outlet joint 12 separated from each other; a diaphragm 3 which can be elastically bulged is sealed between the adjusting switch 2 and the valve block 1; a plug 23, a compression spring 25 and a pressure plate are coaxially arranged in the adjusting switch 2 in sequence, and the pressure plate abuts against the diaphragm 3; the pressure gauge joint 13 is communicated with the liquid inlet joint 11.

[0023] The plug 23 is threadedly connected in the regulating switch 2. By rotating the thread of the plug 23, the elastic force of the compression spring 25 can be adjusted according to the filter model during use, so that the safety pressure of the filter matches the elastic force of the compression spring 25, and then the safety pressure borne by the diaphragm 3 can be adjusted; and the diaphragm 3, under the action of the regulating switch 2 and the fluid pressure, can adjust the connection between the liquid inlet connector 11 and the liquid outlet connector 12 through the concave-convex deformation movement; the pressure gauge connector 13 is used to connect the pressure gauge, and the pressure value can be observed on site for adjustment. When the filter is blocked and fails, the plug 23 is loosened, the compression spring 25 has no force on the pressure plate, and the fluid in the liquid inlet connector 11 pushes up the diaphragm 3 and is discharged from the liquid outlet connector 12, playing the role of a drain valve, thereby ensuring the safe operation of the filter.

[0024] The regulating switch 2 here may also include a seat body 21 bolted to the valve block 1. Accordingly, the plug 23, the compression spring 25 and the pressure plate are all placed in the seat body 21; the pressure plate is slidably matched with the seat body 21; the plug 23 is threadedly connected to the seat body 21; and the diaphragm 3 is sealed and pressed between the seat body 21 and the valve block 1.

[0025] The diaphragm 3 here is preferably a flexible rubber plate, a PVDF plate or other similar materials, wherein PVDF is the abbreviation of polyvinylidene fluoride; accordingly, an annular protrusion is coaxially die-casted on the diaphragm 3, and the cross-section of the annular protrusion is arc-shaped; the direction of the annular protrusion is away from the plug 23; the pressure plate abuts against the plane of the diaphragm 3; the annular protrusion is located on the outside of the pressure plate. The annular protrusion can realize the concave-convex elastic change of the middle part of the diaphragm 3. When the fluid pressure in the liquid inlet joint 11 is greater than the force of the compression spring 25 on the pressure plate, the diaphragm 3 can push the pressure plate under the fluid pressure, thereby connecting the liquid inlet joint 11 and the liquid outlet joint 12; conversely, when the fluid pressure in the liquid inlet joint 11 is less than the force of the compression spring 25 on the pressure plate, the pressure plate acts on the diaphragm 3, so that the diaphragm 3 can make the liquid inlet joint 11 and the liquid outlet joint 12 disconnected.

[0026] Specifically, the valve block 1 is provided with a countersunk hole A14 coaxial with the plug 23, and a countersunk hole B15 is separated on one side of the countersunk hole A14; the liquid inlet joint 11 and the pressure gauge joint 13 are both connected to the countersunk hole A14; the liquid outlet joint 12 is connected to the countersunk hole B15; when the diaphragm 3 abuts against the top of the countersunk hole A14, the liquid inlet joint 11 and the liquid outlet joint 12 are not connected; when the diaphragm 3 is separated from the top of the countersunk hole A14, the liquid inlet joint 11 and the liquid outlet joint 12 are connected.

[0027] The liquid inlet connector 11 and the liquid outlet connector 12 here can be coaxially arranged with each other, and the details are not repeated here.

[0028] As an embodiment of the utility model, a guide shaft 24 is integrally provided on the pressure plate, and the guide shaft 24 coaxially slides through the plug 23; the compression spring 25 is sleeved on the guide shaft 24 to further improve the stability of the pressure plate movement and ensure that the pressure plate acts in the middle of the diaphragm 3.

[0029] As an embodiment of the present utility model, a straight keyway 26 is provided at the top of the plug 23 , and the plug 23 is easily rotated through the keyway 26 .

[0030] A knob 22 threadedly connected to the top of the seat body 21 may be provided above the plug 23 , and a flat key boss matching the key slot 26 may be provided on the knob 22 , so as to further improve the convenience of use.

[0031] The utility model can be summarized in other specific forms that do not violate the spirit or main features of the utility model. Therefore, no matter from which point of view, the above embodiments of the utility model can only be regarded as an explanation of the utility model and cannot limit the utility model. The claims indicate the scope of the utility model, while the above description does not indicate the scope of the utility model. Therefore, any changes within the meaning and scope equivalent to the claims of the utility model should be considered to be included in the scope of the claims of the utility model.

Claims

1. A safety valve for a filter, characterized in that: The invention comprises a valve block (1) with an adjusting switch (2), wherein the valve block (1) is provided with a pressure gauge joint (13) and mutually separated liquid inlet joints (11) and liquid outlet joints (12); a diaphragm (3) which can be elastically bulged is sealed between the adjusting switch (2) and the valve block (1); a plug (23), a compression spring (25) and a pressure plate are coaxially arranged in the adjusting switch (2) in sequence, the pressure plate abuts against the diaphragm (3), the plug (23) is configured to be threadedly rotated and adjust the safety pressure borne by the diaphragm (3); the diaphragm (3) is configured to adjust the communication between the liquid inlet joint (11) and the liquid outlet joint (12); the pressure gauge joint (13) is in communication with the liquid inlet joint (11).

2. The safety valve for a filter according to claim 1, characterized in that: The regulating switch (2) further comprises a seat body (21) bolted to the valve block (1); the plug (23), the compression spring (25) and the pressure plate are all placed in the seat body (21); the pressure plate and the seat body (21) are slidably matched; the plug (23) and the seat body (21) are threadedly connected; and the diaphragm (3) is sealed and pressed between the seat body (21) and the valve block (1).

3. The safety valve for a filter according to claim 2, characterized in that: The pressure plate is integrally provided with a guide shaft (24), and the guide shaft (24) coaxially slides through the plug (23); the compression spring (25) is sleeved on the guide shaft (24).

4. The safety valve for a filter according to claim 2 or 3, characterized in that: A straight keyway (26) is provided at the top of the plug (23).

5. The safety valve for a filter according to claim 4, characterized in that: The regulating switch (2) further comprises a knob (22) threadedly sleeved on the top of the seat body (21), and the knob (22) is provided with a flat key boss matching the key slot (26).

6. The safety valve for a filter according to claim 1, characterized in that: The diaphragm (3) is a flexible rubber plate or a PVDF plate; an annular protrusion is coaxially die-cast on the diaphragm (3), and the cross-section of the annular protrusion is arc-shaped; the direction of the annular protrusion is away from the plug (23); the pressure plate is in contact with the plane of the diaphragm (3); and the annular protrusion is located on the outside of the pressure plate.

7. The safety valve for a filter according to claim 1, characterized in that: The valve block (1) is provided with a counterbore A (14) coaxial with the plug (23), and a counterbore B (15) is separated from one side of the counterbore A (14); the liquid inlet joint (11) and the pressure gauge joint (13) are both in communication with the counterbore A (14); the liquid outlet joint (12) is in communication with the counterbore B (15); the diaphragm (3) is configured such that when it abuts against the top of the counterbore A (14), the liquid inlet joint (11) and the liquid outlet joint (12) are not in communication; when it is detached from the top of the counterbore A (14), the liquid inlet joint (11) and the liquid outlet joint (12) are in communication.

8. The safety valve for a filter according to claim 7, characterized in that: The liquid inlet joint (11) and the liquid outlet joint (12) are coaxial with each other.

9. The safety valve for a filter according to claim 2, characterized in that: O-type sealing rings are respectively provided between the diaphragm (3), the seat body (21) and the valve block (1).

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