Water stop sealing structure and diaphragm pump applying same

Abstract

The utility model discloses a waterstop sealing structure and a diaphragm pump applying the waterstop sealing structure, and belongs to the technical field of water pump sealing, the waterstop sealing structure comprises a pump cavity upper cover, a pump cavity lower cover, a support, a diaphragm and a sealing element, the pump cavity upper cover and the pump cavity lower cover are combined to form a cavity, the support is arranged on the pump cavity lower cover, the diaphragm is arranged on the support, and the sealing element is arranged on the diaphragm. The sealing piece is arranged on the side face of the support, the sealing piece is arranged to abut against the lower end face of the diaphragm, and the pump cavity upper cover extrudes the stacked sealing piece and diaphragm to the pump cavity lower cover. The connecting seam between the pump cavity upper cover and the pump cavity lower cover is sealed through the sealing piece and the diaphragm, and leakage caused by vibration is prevented.

Description

Technical Field

[0001] This utility model relates to the field of water pump sealing technology, specifically to a water-stop sealing structure and a diaphragm pump using the same. Background Technology

[0002] Diaphragm pumps typically include a motor, diaphragm, piston pusher, piston valve body, pump head cover, and a sealing ring between the pump head cover and the piston valve body. Diaphragm pumps often experience leakage after a period of use. This leakage is caused by the gasket inside the pump head cover thinning due to prolonged, high-frequency impact and compression, creating gaps at the sealing surface, and by gaps forming between the side walls of the diaphragm and the pump head cover after a period of interaction. To solve the leakage problem, a stepped groove is usually installed at the opening of the pump head cover. The two walls of the steps apply a horizontal force to the sealing gasket inside the groove, preventing gaps at the sealing surface and achieving a leak-proof effect. However, after prolonged, high-frequency impact and compression, the simple cross-sectional shape of the sealing gasket may still deform, causing it to thin and shrink, resulting in gaps at the sealing surface and leakage still possible. Therefore, a sealing structure that can maintain the stability of the sealing gasket after long-term use is needed. Utility Model Content

[0003] One of the purposes of this invention is to provide a water-stopping sealing structure that solves the problem that existing waterproof sealing structures are prone to gaps due to high-frequency vibrations during long-term use.

[0004] To achieve the above-mentioned objectives, the technical solution adopted by this utility model is as follows:

[0005] A water-stop sealing structure includes a pump chamber upper cover, a pump chamber lower cover, a bracket, a diaphragm, and a sealing element. The pump chamber upper cover and the pump chamber lower cover are combined to form a cavity. The bracket is disposed on the pump chamber lower cover, the diaphragm is disposed on the bracket, and the sealing element is disposed on the side of the bracket and is configured to abut against the lower end face of the diaphragm. The pump chamber upper cover presses the stacked sealing element and the diaphragm onto the pump chamber lower cover, forming a seal at the connection between the pump chamber upper cover and the pump chamber lower cover to prevent leakage caused by vibration.

[0006] Preferably, the middle part of the diaphragm is stacked with the support and pressed into the cavity to prevent the diaphragm from shifting during operation.

[0007] Furthermore, the inner edge of the lower cover of the pump chamber is provided with an inwardly recessed portion, and the inner edge of the upper cover of the pump chamber is provided with an inwardly stepped portion. The recessed portion and the stepped portion are opposite to each other, and the edges of the seal and the diaphragm are disposed between the recessed portion and the stepped portion for applying pressure to the seal and the diaphragm.

[0008] Furthermore, the recessed portion has a first protrusion facing the upper cover of the pump chamber, and a gap groove is provided between the first protrusion and the side wall of the recessed portion. The first protrusion squeezes the seal. The stepped portion has a second protrusion facing the lower cover of the pump chamber, and the second protrusion squeezes the diaphragm to increase the resistance that restricts the movement of the seal and the diaphragm.

[0009] Furthermore, the stepped portion includes a first step and a second step connected together, and the edge of the diaphragm extends downward and then outward to form an overlap, which is inserted into the first step and the second step to restrict the movement of the diaphragm.

[0010] Furthermore, a third protrusion is provided on the lower edge of the diaphragm, which presses against the upper end face of the seal to increase the resistance of the contact surface between the diaphragm and the seal.

[0011] Furthermore, the spacer groove is provided with a plurality of fourth protrusions, which are distributed within the spacer groove. The plurality of fourth protrusions press against the lower end face of the seal to increase the resistance to the movement of the seal.

[0012] Preferably, the seal includes multiple rings connected end to end and arranged around the center of the pump chamber lower cover. Adjacent rings are smoothly connected with a smooth transition, and the distance of each part of the ring from the center of the pump chamber lower cover changes periodically from far to near, to prevent the seal from moving in the recessed groove during vibration.

[0013] More preferably, it also includes a plug, which is integrally connected to the diaphragm and used to form a sealed cavity after the diaphragm is connected.

[0014] The second objective of this utility model is to provide a diaphragm pump that solves the problem of easy leakage after long-term use of existing diaphragm pumps.

[0015] To achieve the above-mentioned objectives, the technical solution adopted by this utility model is as follows:

[0016] A diaphragm pump includes the aforementioned water-stop sealing structure, which seals the internal connection seams of the diaphragm pump to prevent leakage caused by vibration.

[0017] The beneficial effects of this utility model are as follows:

[0018] (1) The water-stop sealing structure is provided with a support, a diaphragm and a sealing element in the cavity formed by the upper cover and the lower cover of the pump chamber. The edge of the sealing element overlaps with the edge of the diaphragm and is squeezed by the upper cover and the lower cover of the pump chamber to form a sealing structure. The sealing element is set on the outside of the support and the support and the middle of the diaphragm are stacked. The high-frequency vibration is absorbed by the flexible contact between the diaphragm and the sealing element, so that the sealing structure can maintain its function for a long time.

[0019] (2) The diaphragm overlap of the water-stop sealing structure is matched with the stepped part of the pump chamber cover. A protrusion is provided on the stepped part to sink into the diaphragm to prevent the diaphragm from moving due to vibration. A protrusion is provided on the contact surface between the diaphragm and the seal to prevent relative sliding between the diaphragm and the seal. A protrusion is provided on the recessed part of the pump chamber cover to prevent relative sliding between the seal and the pump chamber cover. A protrusion is provided on each contact surface of the sealing structure to prevent vibration and prevent loosening and leakage. Attached Figure Description

[0020] Figure 1 An exploded view of the water-stopping sealing structure provided by this utility model;

[0021] Figure 2 The isometric view of the water-stop sealing structure provided by this utility model Figure 1 ;

[0022] Figure 3 The isometric view of the water-stop sealing structure provided by this utility model Figure 2 ;

[0023] Figure 4 This is a top view of the water-stop sealing structure provided by this utility model;

[0024] Figure 5 for Figure 4 Cross-sectional view along the upper AA line;

[0025] Figure 6 A top view of the bracket provided by this utility model;

[0026] Figure 7 for Figure 6 Cross-sectional view along the upper BB line;

[0027] Figure 8 This is a cross-sectional structural diagram provided for Embodiment 2 of this utility model.

[0028] Figure label:

[0029] 1. Pump chamber lower cover; 11. Recess; 12. First protrusion; 13. Spacing groove; 2. Seal; 21. Ring; 3. Bracket; 4. Plug; 5. Diaphragm; 51. Overlap; 6. Pump chamber upper cover; 61. Stepped portion; 62. Second protrusion; 63. First step; 64. Second step; 65. Third protrusion; 66. Fourth protrusion. 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 in the application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0031] Example 1

[0032] like Figures 1-7 As shown, this embodiment discloses a water-stop sealing structure, including a pump chamber upper cover 6, a pump chamber lower cover 1, a bracket 3, a diaphragm 5, and a sealing element 2. The pump chamber upper cover 6 and the pump chamber lower cover 1 are combined to form a cavity, which is used to accommodate internal components to complete the suction action. The bracket 3 is disposed on the pump chamber lower cover 1 and installed in the cavity. The diaphragm 5 is disposed on the bracket 3, and the edge of the diaphragm 5 surrounds the side of the bracket 3. The sealing element 2 is disposed on the side of the bracket 3 and is configured to abut against the lower end face of the diaphragm 5. The pump chamber upper cover 6 presses the stacked sealing element 2 and diaphragm 5 onto the pump chamber lower cover 1, forming a seal at the connection between the pump chamber upper cover 6 and the pump chamber lower cover 1. The pressure generated by the abutment between the diaphragm 5 and the sealing element 2 fills the joint between the pump chamber upper cover 6 and the pump chamber lower cover 1, preventing water leakage from this point.

[0033] The bracket 3 has multiple chambers that connect the upper cover 6 and the lower cover 1 of the pump chamber for use in suction.

[0034] Preferably, the middle part of the diaphragm 5 is stacked with the support 3 and pressed into the cavity. A flange is provided on the lower end face of the middle part of the diaphragm 5, and a groove is provided on the upper end face of the support 3. The flange falls into the groove, so that the diaphragm 5 and the support 3 are relatively fixed, preventing the diaphragm 5 from shifting during operation, playing a limiting role, and preventing the vibration of the diaphragm 5 from being transmitted to the edge and affecting the sealing of the pump chamber upper cover 6 and the pump chamber lower cover 1.

[0035] Furthermore, the inner edge of the pump chamber lower cover 1 is provided with an inwardly facing recessed portion 11, and the inner edge of the pump chamber upper cover 6 is provided with an inwardly facing stepped portion 61. The recessed portion 11 and the stepped portion 61 are opposite each other. The edges of the sealing element 2 and the diaphragm 5 are disposed between the recessed portion 11 and the stepped portion 61. The combined pressure between the pump chamber lower cover 1 and the pump chamber upper cover 6 presses the edges of the sealing element 2 and the diaphragm 5 together to form a pressure seal, which also serves to fix the diaphragm 5.

[0036] Furthermore, the recessed portion 11 is provided with a first protrusion 12 in the direction of the upper cover 6 of the pump chamber, and a spacer groove 13 is provided between the first protrusion 12 and the side wall of the recessed portion 11. The first protrusion 12 squeezes the sealing member 2, and the stepped portion 61 is provided with a second protrusion 62 in the direction of the lower cover 1 of the pump chamber. The second protrusion 62 squeezes the diaphragm 5. The first protrusion 12 and the second protrusion 62 respectively apply local pressure to the sealing member 2 and the diaphragm 5, thereby improving the stability of the sealing member 2 and the diaphragm 5.

[0037] Preferably, the first protrusion 12 is arranged in an annular shape around the pump chamber cover 6. The cross-section of the first protrusion 12 is semi-circular, which has a large contact area with the seal 2 and will not damage the surface of the seal 2, thereby increasing the friction force on the seal 2 and preventing the seal 2 from loosening due to long-term vibration.

[0038] Furthermore, the stepped portion 61 includes a first step 63 and a second step 64 connected to each other. The first step 63 and the second step 64 extend sequentially into the pump chamber cover 6. The edge of the diaphragm 5 extends downward and then outward to form an overlap portion 51. The overlap portion 51 falls onto the first step 63 and the second step 64 to limit the movement of the diaphragm 5 along the axis of the pump chamber cover 6 and increase the upper limit of the degree of stretching deformation of the diaphragm 5.

[0039] Furthermore, a third protrusion 65 is provided on the lower edge of the diaphragm 5. The third protrusion 65 presses against the upper end face of the seal 2. The third protrusion 65 is located on the contact surface between the diaphragm 5 and the seal 2, which increases the resistance to relative sliding after the two come into contact, thereby improving the sealing performance.

[0040] Preferably, the seal 2 includes multiple rings 21 connected end to end and arranged around the center of the pump chamber lower cover 1. Adjacent rings 21 are smoothly connected, and the distance from each part of the ring 21 to the center of the pump chamber lower cover 1 changes periodically from far to near. The seal 2 is made of flexible material and is configured as a non-rotating body. Through the contact between each ring 21 and the recess 11 on the pump chamber lower cover 1, the seal 2 can be prevented from moving around the center of the pump chamber lower cover 1, thereby improving its resistance to vibration.

[0041] More preferably, it also includes a plunger 4, which is connected to the diaphragm 5 to form an integral part, and the plunger 4 is used to seal the diaphragm 5 and connect to the drive mechanism to complete the suction action.

[0042] The working process of this water-stop sealing structure is as follows:

[0043] The seal 2 is installed into the recess 11 of the lower cover 1 of the pump chamber. The diaphragm 5 is fixed to the bracket 3 by the plug 4. The bracket 3 is installed on the lower cover 1 of the pump chamber. The upper cover 6 of the pump chamber is installed on the lower cover 1 of the pump chamber. The overlapping part 51 of the edge of the diaphragm 5 falls into the stepped part 61. The stepped part 61 applies downward pressure to press the diaphragm 5 and the seal 2 together. The second protrusion 62 on the stepped part 61 is inserted into the seal 2. The third protrusion 65 on the stepped part 61 is inserted into the upper end face of the seal 2. The first protrusion 12 on the recess 11 is inserted into the lower end face of the seal 2, so that the diaphragm 5 and the seal 2 are fixed. When subjected to vibration, each protrusion restricts the relative movement of the connecting parts and prevents gaps from appearing on the contact surfaces.

[0044] Example 2

[0045] like Figure 8 As shown, this embodiment also discloses a water-stop sealing structure. Multiple fourth protrusions 66 are provided in the interval groove 13 of the recessed portion 11. The multiple fourth protrusions 66 are distributed in the interval groove 13. The multiple fourth protrusions 66 squeeze the lower end face of the seal 2, causing it to be partially deformed inward. The deformation increases the contact area and friction between the seal 2 and the lower cover 1 of the pump chamber, thereby making it less likely for the seal 2 to develop gaps and leak under vibration.

[0046] Preferably, the fourth protrusion 66 is configured as a dot, which is hemispherical. When it comes into contact with the seal 2, it will not damage the surface of the seal 2. Moreover, the contact area is large, which will not weaken the elasticity of the seal 2 and extend the service life of the seal 2.

[0047] Example 3

[0048] This embodiment also discloses a diaphragm pump, including a water-stop sealing structure and a motor. The motor is connected to the upper cover 6 of the pump chamber and is used to drive the diaphragm 5 to reciprocate to complete the suction action.

[0049] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments disclosed and described above, and any modifications and changes to this utility model should also fall within the protection scope of the claims of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model.

Claims

1. A water stop sealing structure comprising a pump cavity upper cover (6), a pump cavity lower cover (1), a bracket (3), a diaphragm (5) and a sealing member (2), the pump cavity upper cover (6) and the pump cavity lower cover (1) combine to form a cavity, the bracket (3) is arranged on the pump cavity lower cover (1), the diaphragm (5) is arranged on the bracket (3), the sealing member (2) is arranged on the side of the bracket (3), and the sealing member (2) is arranged to abut against the lower end surface of the diaphragm (5), characterized in that: The upper cover (6) of the pump cavity extrudes the stacked sealing element (2) and diaphragm (5) onto the lower cover (1) of the pump cavity, forming a seal at the junction of the upper cover (6) and lower cover (1) of the pump cavity.

2. The water sealing structure according to claim 1, characterized in that: The middle part of the diaphragm (5) is extruded into the cavity after being stacked with the support (3).

3. The water sealing structure according to claim 1, characterized in that: The inner edge of the lower cover (1) of the pump cavity is provided with an inward recess (11), the inner edge of the upper cover (6) of the pump cavity is provided with an inward stepped portion (61), the recess (11) is opposite to the stepped portion (61), and the edges of the sealing element (2) and diaphragm (5) are arranged between the recess (11) and stepped portion (61).

4. The water sealing structure according to claim 3, characterized in that: The recess (11) is provided with a first protrusion (12) in the direction of the upper cover (6) of the pump cavity, a spacing groove (13) is arranged between the first protrusion (12) and the side wall of the recess (11), the first protrusion (12) extrudes the sealing element (2), and the stepped portion (61) is provided with a second protrusion (62) in the direction of the lower cover (1) of the pump cavity, the second protrusion (62) extrudes the diaphragm (5).

5. The water sealing structure according to claim 4, characterized in that: The stepped portion (61) comprises a first step (63) and a second step (64) connected in series, the edge of the diaphragm (5) extends downward and then outward to form an overlapping portion (51), and the overlapping portion (51) falls onto the first step (63) and second step (64).

6. The water sealing structure according to claim 5, characterized in that: A third protrusion (65) is arranged on the lower wall of the edge of the diaphragm (5), and the third protrusion (65) extrudes the upper end surface of the sealing element (2).

7. The water sealing structure according to claim 6, characterized in that: A plurality of fourth protrusions (66) are arranged in the spacing groove (13), the plurality of fourth protrusions (66) are distributed in the spacing groove (13), and the plurality of fourth protrusions (66) extrude the lower end surface of the sealing element (2).

8. The water sealing structure according to claim 7, characterized in that: The sealing element (2) comprises a plurality of ring bands (21), the plurality of ring bands (21) are arranged around the center of the lower cover (1) of the pump cavity in series, the adjacent two ring bands (21) are connected in a smooth transition, and the distances from the ring bands (21) to the center of the lower cover (1) of the pump cavity periodically change from far to near.

9. The water sealing structure according to claim 1, characterized in that: It further comprises a plug column (4) connected to the diaphragm (5) as a whole.

10. A diaphragm pump characterized by: It comprises the water sealing structure according to any one of claims 1-9.

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