A laminated gas-locking flapper check valve

Abstract

The application discloses a laminated air-locking flaky check valve, which comprises an air channel and a membrane valve core. The air channel is formed by hot-pressing connection of two air channel profile hot-pressing lines of outer membrane A and outer membrane B which are stacked. The membrane valve core is composed of inner membrane A and inner membrane B. The inner membrane A and the inner membrane B are located between the outer membrane A and the outer membrane B and are continuously hot-pressed and connected together from top to bottom in sequence of the outer membrane A, the inner membrane A, the inner membrane B and the outer membrane B through the two air channel profile hot-pressing lines. The membrane valve core is provided with two or more than two membrane valve cores which are distributed along the air channel. The structure of the two or more than two membrane valve cores distributed in the air channel greatly improves the air locking effect and basically realizes the target of zero air leakage. The air inlet protection shunt hot-pressing point is additionally arranged in the air channel, which can effectively buffer the impact of the air flow, avoid the damage of high-frequency vibration caused by the air flow to the air channel and improve the service life of the check valve.

Description

Technical Field

[0001] This invention relates to a check valve, and more particularly to a diaphragm check valve. Background Technology

[0002] Existing diaphragm-type check valves have the following defects: First, after inflation, slight air leakage will occur, and if the inflated gas is left for a long time, gas leakage will be found; second, during the inflation process, the high-pressure gas will vibrate, and the outer diaphragm of the check valve will often be damaged. Summary of the Invention

[0003] The purpose of this invention is to provide a stacked airlock plate-shaped one-way valve with good air-tightness.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A stacked, airlock-type one-way valve includes an air passage and a diaphragm valve core. The air passage is formed by heat-pressing two stacked outer diaphragms A and B together via two air passage contour heat-pressing lines. The diaphragm valve core is composed of inner diaphragms A and B, which are located between outer diaphragms A and B. The outer diaphragms A, B, and C are stacked sequentially from top to bottom and continuously heat-pressed together via the two air passage contour heat-pressing lines. There are two or more diaphragm valve cores distributed along the air passage.

[0005] Furthermore, the diaphragm valve core is provided with a diaphragm valve core air inlet port auxiliary opening hot-press line A and a diaphragm valve core air inlet port auxiliary opening hot-press line B on the diaphragm valve core air inlet port and near the air inlet end of the diaphragm valve core. The diaphragm valve core air inlet port auxiliary opening hot-press line A is used to continuously heat-press the outer diaphragm A and the inner diaphragm A, and the diaphragm valve core air inlet port auxiliary opening hot-press line B is used to continuously heat-press the inner diaphragm B and the outer diaphragm B.

[0006] Furthermore, the distances from the auxiliary opening heat-pressing line A and the auxiliary opening heat-pressing line B of the diaphragm valve core air inlet port to the ends of the inner diaphragm A and inner diaphragm B, respectively, are both 1-5mm. This distance cannot be too long, otherwise the auxiliary opening function of the diaphragm valve core air inlet port will be lost; nor can it be too short, otherwise it will be detrimental to heat-press sealing.

[0007] Furthermore, two heat-resistant zones are arranged side by side on the inner diaphragm A and inner diaphragm B of the diaphragm valve core, near the air inlet end of the diaphragm valve core. Two parallel transverse sealing heat-pressing lines pass through the two heat-resistant zones, continuously heat-pressing the outer diaphragm A, inner diaphragm A, inner diaphragm B and outer diaphragm B together. In the heat-resistant zones, only the outer diaphragm A and inner diaphragm A are heat-pressed together, and the inner diaphragm B and outer diaphragm B are heat-pressed together. The inner diaphragm A and inner diaphragm B are not connected during heat pressing. Two air inlet channels of the diaphragm valve core are formed at the two heat-resistant zones.

[0008] Furthermore, a flow guiding hot pressing block is provided in the middle of the diaphragm valve core. The flow guiding hot pressing block continuously heat-presses the outer diaphragm A, inner diaphragm A, inner diaphragm B and outer diaphragm B together to divide the air inlet port of the diaphragm valve core into two airflow channels, left and right.

[0009] Furthermore, the membrane valve core is provided with two flow guiding hot pressing lines. The two flow guiding hot pressing lines extend in the direction of airflow, starting from the two sides of the end of the flow guiding hot pressing block. The two flow guiding hot pressing lines simultaneously heat-press and connect the outer membrane A, inner membrane A, and inner membrane B, or simultaneously heat-press and connect the inner membrane A, inner membrane B, and outer membrane B.

[0010] Furthermore, the membrane valve core is provided with two closing heat-pressing lines at the position of the membrane valve core outlet port. The two closing heat-pressing lines are in a figure-eight shape, and at the same time, the inner membrane A and the inner membrane B are continuously heat-pressed together.

[0011] Furthermore, an intake protection diversion hot pressing point is provided in the middle of the air passage and near the intake end, which heat-presses the outer membrane A and the outer membrane B together.

[0012] Furthermore, the outer membranes A and B, located in the middle of the air passage and between the intake protection diversion hot pressing point and the diaphragm valve core, are provided with heat-resistant zones. A transverse closed hot pressing line passes through the heat-resistant zone, continuously hot-pressing the outer membranes A and B together. At the location of the heat-resistant zone, the outer membranes A and B are not connected, forming an airflow confluence channel at the heat-resistant zone.

[0013] Furthermore, an exhaust protection diversion hot pressing point is provided in the middle of the air passage and near the air outlet, which heat-presses the outer membrane A and the outer membrane B together.

[0014] The beneficial effects of this invention are as follows: 1. This patent features a structure with two or more diaphragm valve cores distributed in the airway, which greatly improves the air-tightness. If the leakage rate of one diaphragm valve core is 1%, then the leakage rate of the second diaphragm valve core is 1%*1%, which basically achieves the goal of zero leakage. 2. This patent adds an intake protection diversion thermal pressure point in the air passage, which divides a large airflow into smaller airflows on both sides. This effectively buffers the impact of the large airflow, avoids damage to the air passage caused by high-frequency vibrations caused by the large airflow, and improves the service life of this one-way valve. 3. This patent adds an air inlet port for the membrane valve core to assist in opening the hot press line. When air is supplied to the air passage, the gas expands the air passage, and the outer membrane A and outer membrane B of the air passage will respectively drive one end of the inner membrane A and one end of the inner membrane B to move outward, thereby opening the air inlet port of the membrane valve core to ensure smooth air intake. 4. This patent has two heat-resistant zones on the inner membrane A and inner membrane B near the air inlet end of the diaphragm valve core. Since they will not be connected during hot pressing at the heat-resistant zones, only one hot pressing is needed to connect the outer membrane A and inner membrane A, and the inner membrane B and outer membrane B, which greatly simplifies the production process. Attached Figure Description

[0015] The present invention will be further described with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present invention. For those skilled in the art, other drawings can be obtained based on the following drawings without creative effort: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 for Figure 1 The sectional view shown is along line A-A. Figure 3 for Figure 2 An enlarged view of point B shown; Figure 4 for Figure 1 The diagram shows a second embodiment of the transverse seal of the diaphragm valve core inlet port.

[0016] In the diagram: 1. Air passage; 2. Diaphragm valve core; 3. Outer diaphragm A; 4. Outer diaphragm B; 5. Air passage contour heat-pressed line; 6. Inner diaphragm A; 7. Inner diaphragm B; 8. Auxiliary opening heat-pressed line A for the diaphragm valve core inlet port; 9. Auxiliary opening heat-pressed line B for the diaphragm valve core inlet port; 10. Guide heat-pressed block; 11. Guide heat-pressed line; 12. Closing heat-pressed line; 13. Inlet protection diversion heat-pressed point; 14. Heat-resistant zone; 15. Lateral sealing heat-pressed line; 16. Exhaust protection diversion heat-pressed point; 17. Heat-resistant zone; 18. Heat-resistant zone; 19. Lateral sealing heat-pressed line. Detailed Implementation

[0017] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0018] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper surface," "lower surface," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "forward," "reverse," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to 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 invention.

[0019] like Figure 1 , 2 As shown in Figure 3, a stacked airlock plate-shaped one-way valve includes an air passage 1 and a diaphragm valve core 2. The air passage 1 is formed by heat-pressing two stacked outer diaphragms A3 and B4 together via two air passage contour heat-pressing lines 5. The diaphragm valve core 2 is composed of inner diaphragms A6 and B7, which are located between outer diaphragms A3 and B4. The outer diaphragms A3, A6, B7, and B4, stacked sequentially from top to bottom, are continuously heat-pressed together via the two air passage contour heat-pressing lines 5. Two diaphragm valve cores 2 are provided, distributed along the air passage 1. This two-diaphragm valve core structure greatly improves the airtightness. If the leakage rate of one diaphragm valve core is 1%, then the leakage rate of the second diaphragm valve core is 1% * 1%, essentially achieving the goal of zero leakage.

[0020] The diaphragm valve core 2 is provided with an auxiliary opening heat-pressing line A8 and a auxiliary opening heat-pressing line B9 near the air inlet end. The auxiliary opening heat-pressing line A8 is used to continuously heat-press the outer diaphragm A3 and the inner diaphragm A6, and the auxiliary opening heat-pressing line B9 is used to continuously heat-press the inner diaphragm B7 and the outer diaphragm B4. With this design, when air is introduced into the air passage, the gas expands the air passage, and the outer diaphragm A3 and the outer diaphragm B4 will respectively drive one end of the inner diaphragm A6 and one end of the inner diaphragm B7 to move outward, thereby opening the air inlet port of the diaphragm valve core to ensure unobstructed air intake.

[0021] The distances from the auxiliary opening heat-pressing line A8 and B9 of the diaphragm valve core air inlet port to the ends of the inner diaphragm A6 and B7, respectively, are both 1-5mm. This distance cannot be too long, otherwise the auxiliary opening function of the diaphragm valve core air inlet port will be lost; nor can it be too short, as this will hinder heat-press sealing.

[0022] An intake protection diversion thermocompression point 13 is provided in the middle of the air passage 1, near the intake end. The intake protection diversion thermocompression point 13 heat-compresses the outer membrane A3 and the outer membrane B4 together. The intake protection diversion thermocompression point divides a large airflow into smaller airflows on both sides, which can effectively buffer the impact of the large airflow and avoid high-frequency vibration caused by the large airflow from damaging the air passage.

[0023] A heat-resistant zone 14 is provided on the outer membrane A3 and outer membrane B4 in the middle of the air passage 1 and in the area between the intake protection diversion hot pressing point 13 and the membrane valve core 2. A transverse closed hot pressing line 15 passes through the heat-resistant zone 14 and continuously heat-presses the outer membrane A3 and outer membrane B4 together. At the position of the heat-resistant zone 14, the outer membrane A3 and outer membrane B4 are not connected, and an airflow confluence channel is formed at the heat-resistant zone 14.

[0024] A flow-guiding hot-pressing block 10 is provided in the middle of the diaphragm valve core 2. The flow-guiding hot-pressing block 10 continuously heat-presses the outer diaphragm A3, inner diaphragm A6, inner diaphragm B7, and outer diaphragm B4 together to divide the air inlet port of the diaphragm valve core into two airflow channels, left and right. This achieves secondary airflow diversion. The flow-guiding hot-pressing block 10 divides the large airflow into smaller airflows flowing on both sides, effectively buffering the impact of the large airflow and providing good protection for the diaphragm valve core 2.

[0025] Two flow guiding hot pressing lines 11 are provided on the diaphragm valve core 2. The two flow guiding hot pressing lines 11 extend in the direction of airflow, starting from the two sides of the end of the flow guiding hot pressing block 10. The two flow guiding hot pressing lines 11 simultaneously heat-press the outer diaphragm A3, inner diaphragm A6, and inner diaphragm B7, or simultaneously heat-press the inner diaphragm A6, inner diaphragm B7, and outer diaphragm B4.

[0026] In this embodiment, two flow-guiding hot-pressing lines 11 continuously heat-press the inner membrane A6, inner membrane B7, and outer membrane B4 together. The two flow-guiding hot-pressing lines 11 serve two functions: first, they guide gas flow; second, they continuously heat-press the inner membrane A6, inner membrane B7, and outer membrane B4 together. When inflation stops, some gas enters between the outer membrane A3 and the inner membrane A6, thus tightly pressing the inner membrane A6 and inner membrane B7 together, which also improves the air-tightening effect of the membrane valve core.

[0027] Two heat-pressing lines 12 are provided on the diaphragm valve core 2 at the position of the diaphragm valve core outlet port. The two heat-pressing lines 12 are in a figure-eight shape and continuously heat-press the inner diaphragm A6 and the inner diaphragm B7 together.

[0028] An exhaust protection diversion thermocompression point 16 is provided in the middle of the airway 1, near the outlet end. The exhaust protection diversion thermocompression point 16 heat-compresses the outer membrane A3 and the outer membrane B4 together. The function of the exhaust protection diversion thermocompression point is to effectively buffer the impact of large airflow and prevent high-frequency vibrations caused by large airflow from damaging the airway.

[0029] A second embodiment of the transverse sealing of the diaphragm valve core inlet port, as shown below. Figure 4 As shown, heat-resistant zones 17 and 18 are arranged side-by-side on the inner diaphragm A6 and inner diaphragm B7 of the diaphragm valve core 2, near the air inlet end of the diaphragm valve core. Two parallel transverse sealing heat-pressing lines 19 pass through the heat-resistant zones 17 and 18, continuously heat-pressing the outer diaphragm A3, inner diaphragm A6, inner diaphragm B7, and outer diaphragm B4 together. At the positions of heat-resistant zones 17 and 18, only the outer diaphragm A3 and inner diaphragm A6, and the inner diaphragm B7 and outer diaphragm B4 are heat-pressed together; the inner diaphragm A6 and inner diaphragm B7 are not connected during heat pressing. Two air inlet channels for the diaphragm valve core are formed on the heat-resistant zones 17 and 18. This design facilitates product manufacturing, as only two parallel transverse sealing heat-pressing lines are needed to continuously heat-press the outer diaphragm A3, inner diaphragm A6, inner diaphragm B7, and outer diaphragm B4 together, greatly simplifying the production process.

[0030] Furthermore, those skilled in the art can combine and integrate the different embodiments or examples described herein, as well as the features of those embodiments or examples, without contradiction. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A stacked, airlock-type check valve, characterized in that: The device includes an air passage and a diaphragm valve core. The air passage is formed by heat-pressing two stacked outer membranes A and B together via two air passage contour heat-pressing lines. The diaphragm valve core is composed of an inner membrane A and an inner membrane B, which are located between the outer membranes A and B. The outer membrane A, inner membrane A, inner membrane B, and outer membrane B, stacked sequentially from top to bottom, are continuously heat-pressed together via the two air passage contour heat-pressing lines. There are two or more diaphragm valve cores distributed along the air passage. A flow-guiding heat-pressing block is provided in the middle of the diaphragm valve core. The flow-guiding heat-pressing block continuously heat-presses the outer membrane A, inner membrane A, inner membrane B, and outer membrane B together, thereby dividing the air inlet port of the diaphragm valve core into two airflow channels, left and right. The membrane valve core is provided with a membrane valve core air inlet port auxiliary opening hot pressing line A and a membrane valve core air inlet port auxiliary opening hot pressing line B on the membrane valve core. The membrane valve core air inlet port auxiliary opening hot pressing line A is used to continuously heat press the outer membrane A and the inner membrane A, and the membrane valve core air inlet port auxiliary opening hot pressing line B is used to continuously heat press the inner membrane B and the outer membrane B. The inner membrane A and inner membrane B of the diaphragm valve core are each provided with two heat-resistant zones arranged side by side at positions close to the air inlet end of the diaphragm valve core. Two parallel transverse sealing heat-pressing lines pass through the two heat-resistant zones, continuously heat-pressing the outer membrane A, inner membrane A, inner membrane B and outer membrane B together. At the position of the heat-resistant zone, only the outer membrane A and inner membrane A are heat-pressed together and the inner membrane B and outer membrane B are heat-pressed together. The inner membrane A and inner membrane B are not connected during heat pressing. Two air inlet channels of the diaphragm valve core are formed at the two heat-resistant zones. The diaphragm valve core is provided with two flow guiding hot pressing lines. The two flow guiding hot pressing lines start from the two sides of the end of the flow guiding hot pressing block and extend in the direction of airflow. The two flow guiding hot pressing lines simultaneously heat-press the outer diaphragm A, inner diaphragm A, and inner diaphragm B continuously, or simultaneously heat-press the inner diaphragm A, inner diaphragm B, and outer diaphragm B continuously. An intake protection diversion hot pressing point is provided in the middle of the air passage and near the intake end. The intake protection diversion hot pressing point heat-presses the outer membrane A and the outer membrane B together. The outer membranes A and B, located in the middle of the air passage and between the intake protection diversion hot pressing point and the diaphragm valve core, are provided with heat-resistant zones. A transverse closed hot pressing line passes through the heat-resistant zone, continuously hot-pressing the outer membranes A and B together. At the location of the heat-resistant zone, the outer membranes A and B are not connected, forming an airflow confluence channel at the heat-resistant zone.

2. The stacked airlock plate-shaped one-way valve according to claim 1, characterized in that: The distances from the auxiliary opening heat-pressing line A and the auxiliary opening heat-pressing line B of the diaphragm valve core air inlet port to the ends of the inner diaphragm A and inner diaphragm B, respectively, are 1-5 mm.

3. The stacked airlock plate-shaped one-way valve according to claim 1, characterized in that: The membrane valve core is provided with two closing heat-pressing lines at the air outlet port of the membrane valve core. The two closing heat-pressing lines are in a figure-eight shape and simultaneously heat-press the inner membrane A and the inner membrane B together.

4. The stacked airlock plate-shaped one-way valve according to claim 1, characterized in that: An exhaust protection diversion hot-pressing point is provided in the middle of the air passage and near the air outlet. The exhaust protection diversion hot-pressing point heat-presses the outer membrane A and the outer membrane B together.

Images