Protective device for filter screen of back pressure valve

Abstract

The utility model provides a back pressure valve filter screen protection device, which relates to the technical field of back pressure valves and comprises a valve body mechanism, the valve body mechanism comprises a three-way valve, spiral pipes are arranged at two ends of the three-way valve, and a butt joint insertion pipe is arranged at the rest end of the three-way valve. According to the utility model, the outer surface of the butt joint insertion pipe is inserted into the pipe inlet through the buckle, then a worker can insert the outer surface of the filter screen into the inner storage pipe in a nested manner, and then the worker can complete butt joint by placing the buckle on the inner surface of the cover cap at one end of the inner storage pipe; then, a worker only needs to install a mounting bolt to penetrate through a cap to fix the mounting bolt in the inner storage pipe and plug an observation cap on the cap for sealing, and then the worker can connect a liquid pipe to a spiral pipe in a butt joint mode and then enter the inner storage pipe through a butt joint insertion pipe for filtering; and therefore, the practicability of the device in the actual use process is improved.

Description

Technical Field

[0001] This utility model relates to the field of back pressure valve technology, and in particular to a back pressure valve filter screen protection device. Background Technology

[0002] Back pressure valve filter screen protection devices are key components in chemical conveying systems, oil pipeline networks, and water treatment equipment for regulating back pressure and intercepting impurity particles. They purify fluids and protect equipment through the filter screen, requiring reliable sealing and rapid maintenance capabilities even in high-pressure and highly corrosive media environments. Traditional back pressure valve filters often employ a flange-nested structure, connecting the filter screen to the valve body via welding or bolts. When the filter screen becomes clogged or damaged, the entire valve must be disassembled, extending equipment downtime. In media containing fibrous or oily impurities, conventional screens, lacking a multi-stage anti-winding structure, are prone to adhesion and clogging.

[0003] Existing back pressure valve filter designs suffer from the following core defects: filter installation requires specialized tools for flange splicing or welding, resulting in poor applicability to pipelines with varying diameters; filter replacement necessitates damaging the original sealing structure and recalibrating the system; filter chamber covers often employ purely threaded fastening, which can easily lead to loosening of the threaded mesh under high vibration conditions; the single axial compression design of the sealing ring is prone to micro-leakage after thermal cycling; and the lack of an integrated filtration status monitoring interface prevents operators from monitoring filter contamination levels without disassembling the equipment, increasing the risk of unplanned downtime. We provide a back pressure valve filter protection device. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies and provide a back pressure valve filter screen protection device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a back pressure valve filter screen protection device, comprising: a valve body mechanism, wherein the valve body mechanism includes a three-way valve, wherein spiral tubes are provided at both ends of the three-way valve, and a docking insertion tube is provided at the remaining end of the three-way valve, wherein a filter cover mechanism is provided on the outer surface of the docking insertion tube.

[0006] A filter cap mechanism includes a cap, one end of which is provided with an inlet, a mounting pin is provided on the cap, an observation cap is provided between four mounting pins, and a discharge indicator is provided at the end of the cap away from the inlet.

[0007] In a preferred embodiment, the cap is provided with a tube mechanism, the tube mechanism including an inner storage tube, one end of the inner storage tube is provided with a protruding base, and a filter screen is provided in the inner storage tube.

[0008] In a preferred embodiment, one end of the protruding base is cast onto the inner storage tube, the inner surface of the filter screen is nested in the inner storage tube, and one end of the inner storage tube is nested and connected to the cap.

[0009] In a preferred embodiment, one end of the inlet is connected to the cap, and the mounting bolt is fixed to the cap.

[0010] In a preferred embodiment, the observation cap is nested on the cover, one end of the discharge indicator port is fused and welded to the end of the cover away from the inlet, and one end of each of the two spiral tubes is welded to the two ends of the three-way valve respectively.

[0011] In a preferred embodiment, one end of the docking tube is welded and cast onto the remaining end of the three-way valve, and the outer surface of the docking tube is nested and docked into the inlet.

[0012] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0013] This invention improves practicality by inserting the outer surface of the connecting tube into the inlet using a snap-fit ​​mechanism. Then, the operator can nest the outer surface of the filter screen into the inner storage tube. The inner surface of the cap is then snapped onto one end of the inner storage tube to complete the connection. The operator then secures the cap by inserting a mounting bolt through it and sealing it in the inner storage tube. Finally, an observation cap is placed on top of the cap for sealing. The liquid tube can then be connected to the spiral tube and filtered through the connecting tube into the inner storage tube, thus enhancing its usability in actual use. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a back pressure valve filter screen protection device provided by this utility model.

[0015] Figure 2 An exploded view of the structure of a back pressure valve filter screen protection device provided by this utility model.

[0016] Figure 3 This utility model provides a schematic diagram of the valve body mechanism and filter cover mechanism of a back pressure valve filter screen protection device.

[0017] Figure 4 A schematic diagram of the tube body structure of a back pressure valve filter screen protection device provided by this utility model.

[0018] Legend:

[0019] 1. Valve body mechanism; 11. Three-way valve; 12. Spiral tube; 13. Connecting tube;

[0020] 2. Filter cover mechanism; 21. Cap; 22. Inlet; 23. Mounting plug; 24. Observation cap; 25. Discharge indicator port;

[0021] 3. Tube body structure; 31. Inner storage tube; 32. Protruding base; 33. Filter screen. Detailed Implementation

[0022] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings and examples.

[0023] It should be noted that many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0024] Furthermore, it should be understood in the description of this utility model that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral unit; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. However, specifying a direct connection indicates that the two main bodies at the connection point are not connected by an intermediate structure, but are simply connected to form a whole through a connecting structure. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0026] In this utility model, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0027] Example 1

[0028] like Figure 1-4 As shown, this utility model provides a technical solution: a back pressure valve filter screen protection device, including: a valve body mechanism 1, the valve body mechanism 1 including a three-way valve 11, the two ends of the three-way valve 11 are provided with spiral tubes 12, the remaining end of the three-way valve 11 is provided with a docking tube 13, and the outer surface of the docking tube 13 is provided with a filter cover mechanism 2.

[0029] The filter cover mechanism 2 includes a cap 21, an inlet 22 at one end of the cap 21, a mounting bolt 23 on the cap 21, an observation cap 24 between the four mounting bolts 23, a discharge indicator port 25 at the end of the cap 21 away from the inlet 22, and a tube body mechanism 3 inside the cap 21. The tube body mechanism 3 includes an inner storage tube 31, a protruding base 32 at one end of the inner storage tube 31, and a filter screen 33 inside the inner storage tube 31.

[0030] One end of the protruding base 32 is cast onto the inner storage tube 31. The inner surface of the filter screen 33 is nested in the inner storage tube 31. One end of the inner storage tube 31 is nested and connected to the cap 21. One end of the inlet 22 is connected to the cap 21. The mounting bolt 23 is installed and fixed on the cap 21. The observation cap 24 is nested and installed on the cap 21. One end of the discharge indicator port 25 is cast and connected to the end of the cap 21 away from the inlet 22. One end of the two spiral tubes 12 is welded to the two ends of the three-way valve 11. One end of the connecting tube 13 is welded and cast onto the remaining end of the three-way valve 11. The outer surface of the connecting tube 13 is nested and connected to the inlet 22.

[0031] In this embodiment, when using this filter protection device to protect the filter, the operator can insert the outer surface of the connecting tube 13 into the inlet 22 using a snap fastener. Then, the operator can insert the outer surface of the filter 33 into the inner storage tube 31. The operator can then place the inner surface of the cap 21 onto one end of the inner storage tube 31 to complete the connection. The operator only needs to install the mounting bolt 23 through the cap 21 and fix it in the inner storage tube 31. Then, the operator can insert the observation cap 24 onto the cap 21 to seal it. The operator can then connect the liquid tube to the spiral tube 12 and then enter the inner storage tube 31 through the connecting tube 13 for filtration, thereby improving its practicality in actual use.

[0032] Working principle:

[0033] like Figure 1-4 As shown, when using this filter protection device to protect the filter, the operator first inserts the outer surface of the connecting tube 13 into the inlet 22 using a snap-fit ​​method to ensure a secure connection. This design allows the inlet pipe to be easily connected to the device, providing a stable liquid flow channel for subsequent operations.

[0034] Next, the staff carefully inserts the outer surface of the filter screen 33 into the inner storage tube 31, ensuring a tight fit between the filter screen 33 and the inner wall of the tube for effective liquid filtration. Then, the staff places the inner surface clip of the cap 21 onto one end of the inner storage tube 31, completing the connection between the cap 21 and the inner storage tube 31. This clip design allows the staff to complete the installation quickly and accurately, ensuring the stability and sealing of the filter screen protection device.

[0035] To further secure and ensure a tight seal, the operator then passes the mounting bolt 23 through the cap 21 and fixes it in the inner reservoir 31. This makes the connection between the cap 21 and the inner reservoir 31 more secure, preventing any liquid leakage or loosening of the filter. Subsequently, the operator inserts the inspection cap 24 onto the cap 21 to complete the sealing operation, ensuring that the filter protection device is not contaminated or damaged by the external environment during use.

[0036] Building upon this, the staff connected the liquid pipe to the spiral tube 12 and introduced the liquid into the inner storage tube 31 for filtration via the connecting tube 13. Through this series of operations, the liquid can be effectively filtered by the filter screen, thereby ensuring the high efficiency and reliability of the device during use.

[0037] Staff can easily install and protect the filter screen, ensuring it maintains its filtering effect and avoids contamination during actual use. The simplicity and efficiency of this design greatly enhance the practicality of the filter screen protection device, ensuring stable operation over extended periods in various scenarios.

[0038] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0039] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A back pressure valve filter screen protection device, characterized in that, include: Valve body mechanism (1), the valve body mechanism (1) includes a three-way valve (11), the two ends of the three-way valve (11) are provided with spiral tubes (12), the remaining end of the three-way valve (11) is provided with a docking tube (13), and the outer surface of the docking tube (13) is provided with a filter cover mechanism (2); The filter cover mechanism (2) includes a cap (21), one end of which is provided with an inlet (22), a mounting bolt (23) is provided on the cap (21), an observation cap (24) is provided between the four mounting bolts (23), and a discharge indicator port (25) is provided at the end of the cap (21) away from the inlet (22).

2. The back pressure valve filter screen protection device according to claim 1, characterized in that: The cap (21) is provided with a tube body mechanism (3), which includes an inner storage tube (31). One end of the inner storage tube (31) is provided with a protruding base (32), and a filter screen (33) is provided in the inner storage tube (31).

3. The back pressure valve filter screen protection device according to claim 2, characterized in that: One end of the protruding base (32) is fused onto the inner storage tube (31), the inner surface of the filter screen (33) is nested in the inner storage tube (31), and one end of the inner storage tube (31) is nested and connected to the cap (21).

4. The back pressure valve filter screen protection device according to claim 1, characterized in that: One end of the inlet (22) is connected to the cap (21), and the mounting bolt (23) is installed and fixed on the cap (21).

5. The back pressure valve filter screen protection device according to claim 1, characterized in that: The observation cap (24) is nested on the cap (21), one end of the discharge indicator port (25) is fused and cast to the end of the cap (21) away from the inlet (22), and one end of each of the two spiral tubes (12) is welded to the two ends of the three-way valve (11) respectively.

6. The back pressure valve filter screen protection device according to claim 1, characterized in that: One end of the docking tube (13) is welded and cast onto the remaining end of the three-way valve (11), and the outer surface of the docking tube (13) is nested and docked into the inlet (22).

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