A diaphragm pump structure with a valve plate

Abstract

This utility model discloses a diaphragm pump structure with a valve plate, comprising a valve plate and valve discs. The valve plate has an inlet channel and an outlet channel. The valve plate includes a lower valve plate and an upper valve plate, which are connected vertically. The mating surface of the lower valve plate has a first sealing groove and a second sealing groove respectively located at the outlet channel and the inlet channel. A valve disc is disposed in both the first and second sealing grooves. A column abutting against the center of the corresponding valve disc is provided in the first sealing groove. The bottom surface of the second sealing groove has several annular protrusions concentrically distributed with the inlet channel. The top of each annular protrusion has an arc-shaped top with a circular cross-section. The surface of the valve disc abuts against the arc-shaped top of the annular protrusion to form a seal. This utility model not only has a simple structure but also good sealing stability and can avoid liquid blockage to a certain extent.

Description

Technical Field

[0001] This utility model relates to the field of diaphragm pump technology, and in particular to a diaphragm pump structure with a valve plate. Background Technology

[0002] A diaphragm pump is a type of pump that generates a certain pressure and flow rate. Diaphragm pumps have a wide range of applications, such as the circulation of ink in printers. The main components of a diaphragm pump include a motor, a pump body, and a valve plate. The valve plate has a channel with a valve plate inside to form a one-way valve structure, meaning that ink can only pass through the channel in one direction. The valve plate is usually made up of an upper valve plate and a lower valve plate joined together to facilitate the installation of the valve plate. The connection between the upper and lower valve plates must take into account the sealing problem, that is, the connection of the channel needs to be sealed. Summary of the Invention

[0003] The purpose of this invention is to design a diaphragm pump structure with a valve plate to overcome the shortcomings of the above-mentioned technology.

[0004] This utility model designs a diaphragm pump structure with a valve plate, including a pump body, a valve plate, and valve discs. The valve plate is disposed on the pump body, and the valve discs are disposed within the valve plate. The valve plate has an inlet channel and an outlet channel. The valve plate includes a lower valve plate and an upper valve plate, which are connected vertically. The mating surface of the lower valve plate has a first sealing groove and a second sealing groove respectively located at the outlet channel and the inlet channel. Valve discs are disposed in both the first and second sealing grooves. A column abutting against the center of the corresponding valve disc is provided in the first sealing groove. The bottom surface of the second sealing groove has several annular protrusions concentrically distributed with the inlet channel. The top of the annular protrusion is an arc-shaped top with a longitudinal cross-section, and the surface of the valve plate abuts against the arc-shaped top of the annular protrusion to form a seal; the bottom surface of the second sealing groove is provided with a raised annular protrusion along the opening of the liquid inlet channel, the raised annular protrusion has a longitudinal cross-section of an arc, and the surface of the raised annular protrusion is a smooth surface; the liquid inlet channel on the upper valve plate joint surface corresponds to the liquid outlet channel on the lower valve plate, the liquid outlet channel on the upper valve plate joint surface corresponds to the liquid inlet channel on the lower valve plate, the liquid outlet channel on the upper valve plate is provided with a column consistent with the lower valve plate, and the liquid inlet channel on the upper valve plate is provided with an annular protrusion and a raised annular protrusion consistent with the lower valve plate.

[0005] Preferably, the mating surface of the upper valve plate is provided with a protrusion with the same shape as the surface of the corresponding valve plate. The column, annular protrusion and raised annular protrusion of the upper valve plate are respectively provided on the corresponding protrusion. When the upper valve plate and the lower valve plate are joined together, the protrusion abuts against the surface of the valve plate to press the valve plate into the corresponding sealing groove.

[0006] Further optimization involves a valve plate comprising a main body plate embedded in a first sealing groove and a second sealing groove. A through hole is provided in the center of the main body plate, and an integral elastic sheet is provided on the inner wall of the through hole. The column is located directly above the elastic sheet, and the elastic sheet is located in the center of the main body plate.

[0007] Further optimization involves the edge of the main body plate comprising a semi-circular segment and a square segment, with the square segment connecting to the diameter of the semi-circular segment. The first and second sealing grooves also correspondingly comprise a semi-circular portion and a square portion. The semi-circular segment of the main body plate is embedded in the semi-circular portion of the sealing groove, and the square segment of the main body plate is embedded in the square portion of the sealing groove.

[0008] Preferably, the lower valve plate has a first screw hole around its perimeter, and the upper valve plate has a corresponding second screw hole. The first screw hole and the second screw hole are fixedly connected by fasteners, thereby achieving the joint connection between the lower valve plate and the upper valve plate.

[0009] Preferably, the valve plate is provided with an annular groove that matches the annular protrusion, so that the valve plate and the bottom surface of the second sealing groove form a sealed connection.

[0010] The technical advantages of this invention are as follows: the valve plate is pressed into the sealing groove of the lower valve plate by the upper valve plate. The lower valve plate has two sealing grooves, each equipped with a valve plate, thus forming two one-way valves. The upper or lower valve plate has annular protrusions on the surface facing the liquid inlet channel. Several annular protrusions are distributed concentrically at intervals. When the valve plate is pressed into the sealing groove, the annular protrusions abut against the surface of the valve plate to form a seal, thus forming a multi-layered, spaced seal. This not only has a simple structure but also good sealing stability. The upper or lower valve plate has a raised annular protrusion at the liquid inlet. The surface of the raised annular protrusion is a smooth, arc-shaped surface. This prevents the residual ink from sticking to the valve plate after ink enters the sealing groove. Especially when not in use for a long time, the ink dries easily, and the adhesion between the valve plate and the raised annular protrusion can easily cause ink blockage in the channel. Attached Figure Description

[0011] Figure 1 This is a three-dimensional view of the overall structure of the valve plate.

[0012] Figure 2 This is a three-dimensional structural diagram of the upper and lower valve plates.

[0013] Figure 3 It is an exploded view of the structure of the valve upper plate, valve plate and valve lower plate.

[0014] Figure 4 This is a cross-sectional view of the valve plate.

[0015] Figure 5This is an exploded view of the overall structure of a diaphragm pump.

[0016] In the diagram: 1. Valve plate; 11. Lower valve plate; 12. Upper valve plate; 2. Valve disc; 21. Main body plate; 211. Semicircular segment; 212. Square segment; 22. Through hole; 23. Elastic sheet; 3. Liquid inlet channel; 4. Liquid outlet channel; 5. First sealing groove; 6. Second sealing groove; 8. Column; 9. Annular protrusion; 10. Raised annular protrusion; 13. Protrusion; 14. First screw hole; 15. Second screw hole; 16. Pump body. Detailed Implementation

[0017] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0018] This utility model includes a pump body 16, a valve plate 1, and a valve disc 2. The valve plate 1 is located on the top of the pump body 16, and the valve disc 2 is located inside the valve plate 1. The valve plate 1 has an inlet channel 3 and an outlet channel 4. The valve plate 1 includes a lower valve plate 11 and an upper valve plate 12, which are connected vertically. The inlet channel 3 and the outlet channel 4 pass through the lower valve plate 11 and the upper valve plate 12. The mating surface of the lower valve plate 11 has a first sealing groove 5 and a second sealing groove 6 at the outlet channel 4 and the inlet channel 3, respectively. The first sealing groove 5 and the second sealing groove 6 are arranged side by side, and each of the first sealing groove 5 and the second sealing groove 6 is provided with a valve disc 2. That is, the two valve discs 2 are separate and independent, which is different from the conventional one-piece valve disc 2 on the market. This is more conducive to the single valve disc 2 in each sealing groove. The system features independent control to prevent interference between the two sealing grooves. The first sealing groove 5 contains a column 8 positioned at the center of the corresponding valve plate 2. The bottom of the column 8 is integrally connected to the first sealing groove 5, and the top of the column 8 extends above the corresponding valve plate 2. After liquid enters the first sealing groove 5 from the outlet channel 4, it pushes open the valve plate 2 located at the outlet of the channel 4. The top of the column 8 blocks the valve plate 2, limiting its movement. When the column 8 is shorter, the valve plate 2 deforms more due to liquid impact, resulting in a larger flow rate of liquid entering the first sealing groove 5. Conversely, when the column 8 is longer, the valve plate 2 deforms less due to liquid impact, resulting in a smaller flow rate of liquid entering the first sealing groove 5. Therefore, by changing the length of the column 8, the flow rate of liquid entering the first sealing groove 5 can be controlled.

[0019] The bottom surface of the second sealing groove 6 is provided with annular protrusions 9 that are concentrically distributed with the liquid inlet channel 3. Several annular protrusions 9 are arranged concentrically and parallel to each other. The top of the annular protrusions 9 is an arc-shaped top with a longitudinal section. In this way, the surface of the valve plate 2 abuts against the arc-shaped top of the annular protrusions 9 to form a line contact. The multiple annular protrusions 9 are distributed at intervals, thereby forming multiple spaced line contacts. In this way, the valve plate 2 and the opening of the liquid inlet channel 3 form multiple seals, and the structure is simple and easy to implement.

[0020] Furthermore, the valve plate 2 is provided with an annular groove that matches the annular protrusion 9. The annular protrusion 9 is embedded into the annular groove one by one, so that the valve plate 2 and the bottom surface of the second sealing groove 6 form a sealing connection. This makes the valve plate 2 and the bottom surface of the second sealing groove 6 form a positioning, and the valve plate 2 is not easy to shift, thereby ensuring the sealing effect.

[0021] The bottom surface of the second sealing groove 6 is provided with an raised annular protrusion 10 along the opening of the liquid inlet channel 3. The raised annular protrusion 10 has a longitudinal section with an arc shape and a smooth surface. In this way, after the liquid enters the second sealing groove 6, the residual liquid will not cause the valve plate 2 to stick to the raised annular protrusion 10. Especially in the case of long-term non-flow, such as ink-like liquids, it is very easy to dry, which will cause the valve plate 2 to stick to the raised annular protrusion 10 and become blocked.

[0022] The inlet channel 3 on the mating surface of the upper valve plate 12 corresponds to the outlet channel 4 on the lower valve plate 11, and the outlet channel 4 on the mating surface of the upper valve plate 12 corresponds to the inlet channel 3 on the lower valve plate 11. The outlet channel 4 of the upper valve plate 12 is provided with a column 8 consistent with that of the lower valve plate 11. The inlet channel 3 of the upper valve plate 12 is provided with an annular protrusion 9 and a raised annular protrusion 10 consistent with that of the lower valve plate 11. That is to say, the first sealing groove 5 and the second sealing groove 6 are set on the lower valve plate 11. For ease of description, the inlet channel 3 and the outlet channel 4 are also relative to the lower valve plate 11. That is, after the upper valve plate 12 and the lower valve plate 11 are joined, the first sealing groove 5 of the lower valve plate 11 and the protrusion 13 of the upper valve plate 12, and the second sealing groove 6 of the lower valve plate 11 and the upper valve plate 11 are respectively located between the first sealing groove 5 of the lower valve plate 11 and the protrusion 13 of the upper valve plate 12, and between the second sealing groove 6 of the lower valve plate 11 and the upper valve plate 12. The other protrusion 13 of 12 encloses a cavity to accommodate the gasket. The two cavities, together with the corresponding valve plate 2, form two one-way valve structures. After the upper valve plate 12 and the lower valve plate 11 are separated, an annular protrusion 9 is provided on the protrusion 13 of the upper valve plate 12 in the cavity where the first sealing groove 5 is located, and a column 8 is provided in the first sealing groove 5 of the lower valve plate 11. In the cavity where the second sealing groove 6 is located, a column 8 is provided on the protrusion 13 of the upper valve plate 12, and an annular protrusion 9 is provided in the second sealing groove 6 of the lower valve plate 11. Therefore, the liquid inlet channel 3 and the liquid outlet channel 4 are distinguished relative to the direction of the column 8 and the annular protrusion 9. That is, the direction of the annular protrusion 9 is the liquid inlet direction, so that both the liquid inlet channel 3 and the liquid outlet channel 4 form one-way channels.

[0023] Furthermore, the mating surface of the upper valve plate 12 is provided with a protrusion 13 that has the same shape as the surface of the corresponding valve plate 2. The column 8, the annular protrusion 9 and the raised annular protrusion 10 of the upper valve plate 12 are respectively provided on the corresponding protrusion 13. When the upper valve plate 12 and the lower valve plate 11 are joined together, the protrusion 13 abuts against the surface of the valve plate 2 to press the valve plate 2 into the corresponding sealing groove, thereby reinforcing the valve plate 2.

[0024] Furthermore, the valve plate 2 includes a main body plate 21 embedded in the first sealing groove 5 and the second sealing groove 6. A through hole 22 is provided in the center of the main body plate 21, and an integral elastic sheet 23 is provided on the inner wall of the through hole 22. The column 8 is located directly above the elastic sheet 23, and the elastic sheet 23 is located in the center of the main body to form a one-way valve structure, so that the elastic sheet 23 can deform quickly, thus making the liquid flow control response faster and more precise.

[0025] Furthermore, the edge of the main body plate 21 includes a semi-circular segment 211 and a square segment 212. The square segment 212 is connected to the diameter of the semi-circular segment 211. The first sealing groove 5 and the second sealing groove 6 also include a semi-circular part and a square part respectively. The semi-circular segment 211 of the main body plate 21 is embedded in the semi-circular part of the sealing groove, and the square segment 212 of the main body plate 21 is embedded in the square part of the sealing groove. That is, the square part and the square segment 212 form a limiting fit, while the semi-circular segment 211 and the semi-circular part serve as a buffer zone, allowing for a certain degree of deformation. After deformation, it will not affect the installation and limiting of the valve plate 2.

[0026] Furthermore, the lower valve plate 11 has first screw holes 14 around its perimeter, and the upper valve plate 12 has corresponding second screw holes 15. The first screw holes 14 and the second screw holes 15 are fixedly connected by fasteners, thereby realizing the joint connection between the lower valve plate 11 and the upper valve plate 12.

[0027] The valve upper plate 12 is provided with an inlet and an outlet. One end of the inlet channel 3 and the outlet channel 4 are connected to the inlet and the outlet, respectively, and the other end of the inlet channel 3 and the outlet channel 4 are connected to the diaphragm pump body, thereby realizing unidirectional inlet and outlet flow.

[0028] This utility model is not limited to the above-described preferred embodiments. Anyone can derive other forms of products under the guidance of this utility model. However, regardless of any changes made in their shape or structure, any technical solution that is the same as or similar to this application falls within the protection scope of this utility model.

Claims

1. A diaphragm pump structure with a valve plate, characterized in that, The pump includes a pump body (16), a valve plate (1), and a valve disc (2). The valve plate (1) is mounted on the pump body (16), and the valve disc (2) is mounted inside the valve plate (1). The valve plate (1) has an inlet channel (3) and an outlet channel (4). The valve plate (1) includes a lower valve plate (11) and an upper valve plate (12). The lower valve plate (11) and the upper valve plate (12) are connected vertically. The mating surface of the lower valve plate (11) has a first sealing groove (5) and a second sealing groove (6) located at the outlet channel (4) and the inlet channel (3), respectively. A valve disc (2) is provided in both the first sealing groove (5) and the second sealing groove (6). A column (8) is provided in the first sealing groove (5) and abuts the center of the corresponding valve disc (2). The bottom surface of the second sealing groove (6) has several annular protrusions (9) that are concentrically distributed with the inlet channel (3). The top of (9) is an arc-shaped top with a longitudinal section of circular arc. The surface of the valve plate (2) abuts against the arc-shaped top of the annular protrusion (9) to form a seal. The bottom surface of the second sealing groove (6) is provided with a raised annular protrusion (10) along the opening of the liquid inlet channel (3). The raised annular protrusion (10) has a longitudinal section of circular arc and the surface of the raised annular protrusion (10) is a smooth surface. The liquid inlet channel (3) on the joint surface of the upper valve plate (12) corresponds to the liquid outlet channel (4) of the lower valve plate (11). The liquid outlet channel (4) on the joint surface of the upper valve plate (12) corresponds to the liquid inlet channel (3) of the lower valve plate (11). The liquid outlet channel (4) of the upper valve plate (12) is provided with a column (8) consistent with the lower valve plate (11). The liquid inlet channel (3) of the upper valve plate (12) is provided with an annular protrusion (9) and a raised annular protrusion (10) consistent with the lower valve plate (11).

2. The diaphragm pump structure with valve plate according to claim 1, characterized in that, The upper valve plate (12) has a protrusion (13) with the same shape as the surface of the corresponding valve plate (2) on its mating surface. The column (8), annular protrusion (9) and raised annular protrusion (10) of the upper valve plate (12) are respectively provided on the corresponding protrusion (13). When the upper valve plate (12) and the lower valve plate (11) are joined together, the protrusion (13) abuts against the surface of the valve plate (2) to press the valve plate (2) into the corresponding sealing groove.

3. The diaphragm pump structure with valve plate according to claim 2, characterized in that, The valve plate (2) includes a main plate (21) embedded in the first sealing groove (5) and the second sealing groove (6). A through hole (22) is provided in the center of the main plate (21). An integral elastic sheet (23) is provided on the inner wall of the through hole (22). The column (8) is located directly above the elastic sheet (23). The elastic sheet (23) is located in the center of the main plate.

4. The diaphragm pump structure with valve plate according to claim 3, characterized in that, The edge of the main plate (21) includes a semi-circular segment (211) and a square segment (212). The square segment (212) is connected to the diameter of the semi-circular segment (211). The first sealing groove (5) and the second sealing groove (6) also include a semi-circular part and a square part respectively. The semi-circular segment (211) of the main plate (21) is embedded in the semi-circular part of the sealing groove, and the square segment (212) of the main plate (21) is embedded in the square part of the sealing groove.

5. The diaphragm pump structure with valve plate according to claim 1, characterized in that, The lower valve plate (11) has a first screw hole (14) around its perimeter, and the upper valve plate (12) has a second screw hole (15) at the corresponding location. The first screw hole (14) and the second screw hole (15) are fixedly connected by fasteners, thereby realizing the joint connection between the lower valve plate (11) and the upper valve plate (12).

6. The diaphragm pump structure with valve plate according to claim 1, characterized in that, The valve plate (2) has an annular groove that matches the annular protrusion (9), so that the valve plate (2) and the bottom surface of the second sealing groove (6) form a sealed connection.

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