Perspective high negative pressure filter with differential pressure measurement function

Abstract

The utility model relates to the technical field of filters, and discloses a perspective high negative pressure filter with a differential pressure measuring function, which comprises a filter shell, the top of the filter shell is in threaded connection with a sealing cover, the middle of the top end of the sealing cover is fixedly connected with a negative pressure machine, and the right side of the negative pressure machine is communicated with a liquid discharge pipe. The bottom of the negative pressure machine is communicated with a liquid suction pipe, the bottom of the inner side of the filter shell is fixedly connected with a liquid storage tank, the middle of the liquid storage tank is fixedly connected with a filter screen, the top of the liquid storage tank is in threaded connection with a cover plate, and the right side of the top of the cover plate is communicated with a second connecting pipe. According to the utility model, when the sealing sleeve is opened, the indicating liquid is poured into the U-shaped meter and the pressure in the liquid storage tank is changed, the liquid level change of the indicating liquid in the U-shaped meter can represent the internal pressure difference, so that the magnitude and the change condition of the pressure difference in the liquid storage tank can be intuitively known, and the accuracy and the continuity of pressure difference measurement are ensured.

Description

Technical Field

[0001] This utility model relates to the field of filter technology, and in particular to a transparent high negative pressure filter with differential pressure measurement function. Background Technology

[0002] In the chemical, pharmaceutical, and electronics industries, high-precision filtration of various fluids is required during production. In chemical production, if impurities in the fluid are not effectively filtered during the feeding and discharging stages of the reactor, it will affect product quality and even lead to equipment failure. With increasing environmental awareness and increasingly stringent safety regulations, filtration equipment in industrial production must not only meet filtration performance requirements but also possess good safety and environmental protection capabilities. High negative pressure filters can prevent outside air and impurities from entering the system, avoiding pollution of the production environment. At the same time, through differential pressure measurement and transparent design, potential safety hazards can be detected in a timely manner, and corresponding measures can be taken to ensure the safety of personnel and equipment. In some places with strict environmental requirements, transparent high negative pressure filters can ensure the cleanliness of air and fluids, providing a safe environment for personnel and equipment.

[0003] A high negative pressure filter consists of a shell, filter element, inlet and outlet pipe interfaces, and a differential pressure measuring device. It generates strong negative pressure suction, allowing liquid to pass through the filter medium quickly while effectively intercepting and removing various impurities in the liquid, ensuring the purity of the liquid and meeting the liquid quality requirements of different application scenarios. However, during the filtration process, as impurities are continuously trapped inside the filter, it gradually becomes clogged. Without a differential pressure measuring function, changes in the pressure difference across the filter cannot be detected in time, making it impossible to determine the degree of clogging and affecting the normal operation of the entire system. Existing technology measures differential pressure by utilizing the change in distance between two capacitor plates. When the differential pressure acts on the movable plate, the distance between the plates changes, causing a change in the capacitance value. The differential pressure is calculated by measuring the change in capacitance. However, differential pressure measurement is not highly adaptable to the environment and is sensitive to temperature and humidity. Temperature changes can easily cause zero-point drift and changes in sensitivity, leading to reduced measurement accuracy. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a transparent high negative pressure filter with differential pressure measurement function, aiming to improve the problems of low applicability to the environment when performing differential pressure measurement in the prior art, sensitivity to temperature and humidity, and the tendency of temperature changes to cause zero drift and changes in sensitivity, resulting in reduced measurement accuracy.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a transparent high negative pressure filter with differential pressure measurement function, comprising a filter housing, a sealing cap threaded to the top of the filter housing, a negative pressure unit fixedly connected to the top center of the sealing cap, a drain pipe connected to the right side of the negative pressure unit, a suction pipe connected to the bottom of the negative pressure unit, a storage tank fixedly connected to the bottom inner side of the filter housing, a filter screen fixedly connected to the center of the storage tank, a cover plate threaded to the top of the storage tank, a connecting pipe second connected to the top right side of the cover plate, a U-shaped gauge connected to the bottom right side of the connecting pipe second, a sealing sleeve threaded to the top right side of the U-shaped gauge, and a connecting mechanism provided on the top of the filter housing to improve the sealing performance of the connection.

[0006] As a further description of the above technical solution:

[0007] The connecting mechanism includes an inlet pipe, the bottom of which is connected to the top left side of the filter housing. A connecting sleeve is fixedly connected to the outer wall of the inlet pipe. A threaded sleeve is threadedly connected to the left side of the connecting sleeve. Two positioning holes start from the right side of the threaded sleeve. A connecting pipe is fixedly connected to the inner wall of the threaded sleeve. A sealing ring is slidably connected to the outer wall of the connecting sleeve. Two positioning pins are fixedly connected to the left side of the sealing ring. The left side of the positioning pins engages with the inner wall of the corresponding positioning hole.

[0008] As a further description of the above technical solution:

[0009] The outer wall of the U-shaped meter is fixedly connected with graduation lines, and the outer wall of the liquid storage tank is fixedly connected with a transparent sleeve.

[0010] As a further description of the above technical solution:

[0011] An alarm light is fixedly connected to the top rear side of the sealing cover, and a warning sign is fixedly connected to the top front side of the sealing cover.

[0012] As a further description of the above technical solution:

[0013] A support plate is fixedly connected to the bottom of the filter housing, and an anti-slip pad is fixedly connected to the bottom of the support plate.

[0014] As a further description of the above technical solution:

[0015] A sealing ring is fixedly connected to the right side of the filter housing, and an observation window is fixedly connected to the front side of the filter housing.

[0016] As a further description of the above technical solution:

[0017] A support frame is fixedly connected to the left side of the filter housing, and a mounting block is fixedly connected to the middle of the support frame.

[0018] As a further description of the above technical solution:

[0019] A nameplate is fixedly connected to the top front side of the mounting block, and a button is fixedly connected to the front side of the mounting block.

[0020] This utility model has the following beneficial effects:

[0021] 1. In this utility model, the sealing sleeve is opened, and the indicating liquid is poured into the U-shaped gauge. A negative pressure is generated inside the storage tank by a negative pressure machine. After being filtered by the filter screen, the liquid falls to the bottom of the storage tank, is sucked in through the suction pipe, and is discharged from the drain pipe. At this time, the pressure difference inside the U-shaped gauge is displayed by the change in the liquid level of the indicating liquid. The magnitude and change of the pressure difference inside the storage tank can be intuitively understood. It can work normally in various harsh working environments and ensure the accuracy and continuity of pressure difference measurement.

[0022] 2. In this utility model, when connection is required, the positioning pin is engaged with the corresponding positioning hole by sliding the sealing ring one, thus achieving initial connection. Then, as the threaded sleeve rotates, a threaded sealing connection with the connecting sleeve is achieved. The operation is simple. At the same time, after initial positioning, the sealing ring one between the threaded sleeve and the connecting sleeve can further enhance the tightness of the connection, effectively prevent liquid leakage, and meet the sealing performance requirements under different working conditions. Attached Figure Description

[0023] Figure 1 This is a perspective view of the front side of the filter housing of the transparent high negative pressure filter with differential pressure measurement function proposed in this utility model.

[0024] Figure 2 This is a diagram showing the sealing cap of the transparent high negative pressure filter with differential pressure measurement function proposed in this utility model.

[0025] Figure 3 This is a split view of the transparent high negative pressure filter with differential pressure measurement function proposed in this utility model.

[0026] Figure 4 This is a split view of the sealing sleeve of the transparent high negative pressure filter with differential pressure measurement function proposed in this utility model.

[0027] Figure 5 This is a schematic diagram of the connecting sleeve of the transparent high negative pressure filter with differential pressure measurement function proposed in this utility model.

[0028] Legend:

[0029] 1. Filter housing; 2. Connecting mechanism; 201. Inlet pipe; 202. Connecting sleeve; 203. Threaded sleeve; 204. Positioning hole; 205. Connecting pipe one; 206. Sealing ring one; 207. Positioning post; 3. Sealing cover; 4. Negative pressure unit; 5. Drain pipe; 6. Suction pipe; 7. Storage tank; 8. Filter screen; 9. Cover plate; 10. Connecting pipe two; 11. U-shaped gauge; 12. Sealing sleeve; 13. Scale line; 14. Transparent sleeve; 15. Alarm light; 16. Warning sign; 17. Support plate; 18. Anti-slip mat; 19. Sealing ring two; 20. Observation window; 21. Support frame; 22. Mounting block; 23. Nameplate; 24. Button. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Please see the appendix Figure 1 - Appendix Figure 3 An embodiment of this utility model provides a transparent high negative pressure filter with differential pressure measurement function, including a filter housing 1, a sealing cover 3 threadedly connected to the top of the filter housing 1, a negative pressure machine 4 fixedly connected to the top center of the sealing cover 3, a drain pipe 5 connected to the right side of the negative pressure machine 4, a suction pipe 6 connected to the bottom of the negative pressure machine 4, a storage tank 7 fixedly connected to the bottom inside the filter housing 1, a filter screen 8 fixedly connected to the middle of the storage tank 7, a cover plate 9 threadedly connected to the top of the storage tank 7, a connecting pipe 2 10 connected to the top right side of the cover plate 9, a U-shaped gauge 11 connected to the bottom right side of the connecting pipe 2 10, a sealing sleeve 12 threadedly connected to the top right side of the U-shaped gauge 11, and a connecting mechanism 2 provided on the top of the filter housing 1 to improve the sealing performance of the connection.

[0032] Specifically, a sealing cap 3 is threadedly connected to the top of the filter housing 1, ensuring the filter's sealing performance under high pressure. A negative pressure unit 4 is fixedly installed at the top center of the sealing cap 3, responsible for providing the necessary negative pressure environment for the entire filtration process. The right side of the negative pressure unit 4 is connected to the drain pipe 5, which can discharge the filtered liquid and avoid the risk of liquid backflow and contamination. At the same time, the bottom of the negative pressure unit 4 is also connected to the suction pipe 6, ensuring that the liquid can be stably and efficiently drawn into the filtration system, thereby improving the filtration efficiency. The liquid storage tank 7 serves as a temporary storage space for the liquid, and its internal filter screen 8 intercepts and filters out impurities in the liquid. The U-shaped gauge 11 achieves accurate measurement of liquid pressure through its U-shaped structure, and the sealing sleeve 12 further ensures the sealing performance of the filter.

[0033] Please see the appendix Figure 3 - Appendix Figure 5 The connecting mechanism 2 includes an inlet pipe 201. The bottom of the inlet pipe 201 is connected to the top left side of the filter housing 1. A connecting sleeve 202 is fixedly connected to the outer wall of the inlet pipe 201. A threaded sleeve 203 is threadedly connected to the left side of the connecting sleeve 202. Two positioning holes 204 start from the right side of the threaded sleeve 203. A connecting pipe 205 is fixedly connected to the inner wall of the threaded sleeve 203. A sealing ring 206 is slidably connected to the outer wall of the connecting sleeve 202. Two positioning pins 207 are fixedly connected to the left side of the sealing ring 206. The left side of the positioning pins 207 engages with the inner wall of the corresponding positioning hole 204.

[0034] Specifically, the bottom of the inlet pipe 201 is connected to the top left side of the filter housing 1, forming a liquid transmission channel. To enhance the stability of the connection, a connecting sleeve 202 is fixedly connected to the outer wall of the inlet pipe 201. The connecting sleeve 202 is tightly connected to the threaded sleeve 203 through its inner thread, ensuring a sealing effect. A connecting pipe 205 is fixedly connected to the inner wall of the threaded sleeve 203, ensuring the stability of the liquid flow and thus improving the filtration efficiency. To further ensure the sealing of the connection, a sealing ring 206 is slidably connected to the outer wall of the connecting sleeve 202. Two positioning posts 207 are fixedly connected to the left side of the sealing ring 206. The left sides of these two positioning posts 207 engage with the inner wall of the corresponding positioning hole 204, which not only ensures the stability of the connection but also ensures that the connecting mechanism 2 can maintain its sealing performance and prevent liquid leakage under various working environments.

[0035] Please see the appendix Figure 1 - Appendix Figure 3 An alarm light 15 is fixedly connected to the top rear side of the sealing cover 3, a warning sign 16 is fixedly connected to the top front side of the sealing cover 3, a nameplate 23 is fixedly connected to the top front side of the mounting block 22, a button 24 is fixedly connected to the front side of the mounting block 22, a support plate 17 is fixedly connected to the bottom of the filter housing 1, and an anti-slip pad 18 is fixedly connected to the bottom of the support plate 17.

[0036] Specifically, the alarm light 15 ensures that a clear warning signal can be emitted when needed, the warning sign 16 is used to remind people of the risks and warning information, the nameplate 23 will be marked with important information about the equipment for easy identification and tracking, and the button 24 is used to control the on / off of the equipment.

[0037] Please see the appendix Figure 1 - Appendix Figure 3 A sealing ring 19 is fixedly connected to the right side of the filter housing 1. An observation window 20 is fixedly connected to the front side of the filter housing 1. A scale line 13 is fixedly connected to the outer wall of the U-shaped meter 11. A transparent sleeve 14 is fixedly connected to the outer wall of the liquid storage tank 7. A support frame 21 is fixedly connected to the left side of the filter housing 1. An installation block 22 is fixedly connected to the middle of the support frame 21.

[0038] Specifically, sealing ring 29 ensures the sealing performance of the filter, observation window 20 allows for easy observation of the filtration process, scale line 13 is fixedly connected to the outer wall of U-shaped gauge 11 to provide measurement reference for the operator, and transparent sleeve 14 allows direct observation of the liquid level in storage tank 7.

[0039] Working principle: Open the sealing sleeve 12 and pour the indicating liquid into the U-shaped gauge 11. When measuring a small pressure difference, water can be used as the indicating liquid. When measuring a large pressure difference and requiring high accuracy, mercury can be used. The negative pressure is generated inside the storage tank 7 by the negative pressure machine 4. After the liquid is filtered by the filter screen 8, it falls to the bottom of the storage tank 7, is sucked in through the suction pipe 6, and is discharged from the drain pipe 5. At this time, the pressure inside the storage tank 7 will change. The pressure difference inside the U-shaped gauge 11 is displayed by the change in the liquid level of the indicating liquid. The magnitude and change of the pressure difference inside the storage tank 7 can be intuitively understood without the need for complex instruments. At the same time, the structure is relatively simple, without complex electronic components and mechanical transmission devices. It is not easily affected by electromagnetic interference and mechanical failure factors, and has high reliability and stability. It can work normally in various harsh working environments, ensuring the accuracy and continuity of pressure difference measurement.

[0040] When connection is required, the positioning pin 207 engages with the corresponding positioning hole 204 by sliding the sealing ring 206, achieving initial connection. Then, with the rotation of the threaded sleeve 203, a threaded sealing connection with the connecting sleeve 202 is achieved. The operation is simple. After initial positioning, the sealing ring 206 between the threaded sleeve 203 and the connecting sleeve 202 can further enhance the tightness of the connection, effectively preventing liquid leakage and meeting the sealing performance requirements under different working conditions.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A transparent high negative pressure filter with differential pressure measurement function, comprising a filter housing (1), characterized in that: The top of the filter housing (1) is threaded with a sealing cap (3), and a negative pressure machine (4) is fixedly connected to the top center of the sealing cap (3). A drain pipe (5) is connected to the right side of the negative pressure machine (4), and a suction pipe (6) is connected to the bottom of the negative pressure machine (4). A storage tank (7) is fixedly connected to the bottom of the inner side of the filter housing (1). A filter screen (8) is fixedly connected to the middle of the storage tank (7). A cover plate (9) is threadedly connected to the top of the storage tank (7). A connecting pipe (10) is connected to the top right side of the cover plate (9). A U-shaped gauge (11) is connected to the bottom right side of the connecting pipe (10). A sealing sleeve (12) is threadedly connected to the top right side of the U-shaped gauge (11). A connecting mechanism (2) is provided on the top of the filter housing (1). The connecting mechanism (2) is used to improve the sealing of the connection.

2. The transparent high negative pressure filter with differential pressure measurement function according to claim 1, characterized in that: The connecting mechanism (2) includes an inlet pipe (201), the bottom of which is connected to the top left side of the filter housing (1). A connecting sleeve (202) is fixedly connected to the outer wall of the inlet pipe (201). A threaded sleeve (203) is threadedly connected to the left side of the connecting sleeve (202). Two positioning holes (204) are located on the right side of the threaded sleeve (203). A connecting pipe (205) is fixedly connected to the inner wall of the threaded sleeve (203). A sealing ring (206) is slidably connected to the outer wall of the connecting sleeve (202). Two positioning pins (207) are fixedly connected to the left side of the sealing ring (206). The left side of the positioning pins (207) engages with the inner wall of the corresponding positioning hole (204).

3. The transparent high negative pressure filter with differential pressure measurement function according to claim 1, characterized in that: The outer wall of the U-shaped gauge (11) is fixedly connected with a scale line (13), and the outer wall of the liquid storage tank (7) is fixedly connected with a transparent sleeve (14).

4. The transparent high negative pressure filter with differential pressure measurement function according to claim 1, characterized in that: An alarm light (15) is fixedly connected to the rear top of the sealing cover (3), and a warning sign (16) is fixedly connected to the front top of the sealing cover (3).

5. The transparent high negative pressure filter with differential pressure measurement function according to claim 1, characterized in that: A support plate (17) is fixedly connected to the bottom of the filter housing (1), and an anti-slip pad (18) is fixedly connected to the bottom of the support plate (17).

6. The transparent high negative pressure filter with differential pressure measurement function according to claim 1, characterized in that: A sealing ring 2 (19) is fixedly connected to the right side of the filter housing (1), and an observation window (20) is fixedly connected to the front side of the filter housing (1).

7. The transparent high negative pressure filter with differential pressure measurement function according to claim 1, characterized in that: A support frame (21) is fixedly connected to the left side of the filter housing (1), and a mounting block (22) is fixedly connected to the middle of the support frame (21).

8. The transparent high negative pressure filter with differential pressure measurement function according to claim 7, characterized in that: A nameplate (23) is fixedly connected to the top front side of the mounting block (22), and a button (24) is fixedly connected to the front side of the mounting block (22).

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