A diaphragm pump

Abstract

This utility model relates to the field of fluid transport equipment technology, specifically to a diaphragm pump. The piston cylinder contains a piston head with an annular protrusion in the middle. A sealing support ring is tightly fitted against the protrusion on the piston head. A sealing piston ring is located on the side of the sealing support ring near the end of the piston head. A sealing pressure ring is located on the side of the piston sealing ring near the end of the piston head. A sealing pressure cap, L-shaped, is located at the end of the piston head. One side of the sealing pressure cap presses against the sealing pressure ring, and the other side presses against the end face of the piston head. The sealing pressure cap is fixed to the piston head by clamping bolts. This utility model employs a multi-layer sealing structure, forming multiple sealing barriers to effectively prevent leakage of the working fluid. The protrusion on the piston head provides stable support for the piston sealing ring, reducing vibration and impact caused by piston movement.

Description

Technical Field

[0001] This utility model relates to the field of fluid transport equipment technology, specifically to a diaphragm pump. Background Technology

[0002] In the field of fluid transfer and processing, diaphragm pumps are an important type of pump widely used in industries such as chemical, pharmaceutical, and food processing. Traditional diaphragm pump designs typically include key components such as the pump body, piston cylinder, piston head, and sealing assemblies. Because the piston head reciprocates within the piston cylinder, the sealing assemblies must withstand significant pressure and wear, making them prone to leakage. This not only affects the diaphragm pump's efficiency but can also adversely impact the working environment and product quality. Furthermore, the sealing assembly structure of traditional diaphragm pumps is relatively complex, making installation and maintenance difficult. For example, the fixing methods for components such as sealing rings and pressure rings are often not secure enough, easily leading to loosening or damage after prolonged operation. This not only increases maintenance costs but may also affect the pump's lifespan. Utility Model Content

[0003] In view of the problems of complex sealing component structure, difficult installation and maintenance, and easy leakage in the above-mentioned existing technology, this utility model provides a diaphragm pump.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows:

[0005] A diaphragm pump includes a pump body, a piston cylinder, a piston cylinder mounting cover, a clamping screw, a piston rod, a piston head, and a sealing assembly. The pump body has an inlet. One end of the piston cylinder is connected to the inlet, and the other end of the piston cylinder has the piston cylinder mounting cover, which has a hole through which the piston rod can pass. One end of the clamping screw passes through the piston cylinder mounting cover and is fixed to the pump body. The piston head is located inside the piston cylinder, and the piston head has an annular protrusion in the middle. The piston head is connected to the piston rod. The piston head has the... A sealing assembly; the sealing assembly includes a sealing support ring, a piston sealing ring, a sealing pressure ring, and a sealing cap. The sealing support ring is in close contact with a protrusion on the piston head. The piston sealing ring is located on the side of the sealing support ring near the end of the piston head. The sealing pressure ring is located on the side of the piston sealing ring near the end of the piston head. The end of the piston head is provided with the sealing cap, which is L-shaped. One side of the sealing cap presses against the sealing pressure ring, and the other side presses against the end face of the piston head. The sealing cap is fixed to the piston head by clamping bolts.

[0006] Furthermore, the inner diameter of the piston cylinder is 270-310 cm.

[0007] Furthermore, the piston sealing ring is a double-lip sealing ring.

[0008] Furthermore, the piston rod and the piston head are connected by threads or pins.

[0009] Furthermore, there are at least two clamping screws, evenly distributed on the piston rod mounting cover.

[0010] Furthermore, the piston head is provided with two sets of sealing assemblies.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] This invention provides a diaphragm pump employing a multi-layer sealing structure, including a sealing support ring, a piston sealing ring, a sealing pressure ring, and a sealing gland, forming multiple sealing barriers to effectively prevent leakage of the working fluid. The double-lip piston sealing ring tightly conforms to the inner wall of the piston cylinder, ensuring good sealing performance even under high pressure or high-speed operation. The sealing support ring closely adheres to the protrusion on the piston head, providing stable support for the piston sealing ring and reducing vibration and impact caused by piston movement, thereby extending the service life of the sealing assembly. Simultaneously, the sealing gland is securely fixed to the piston head with clamping bolts, further enhancing the stability of the entire sealing assembly. The sealing assembly structure of this invention is relatively simple, with clear and straightforward connections and fixation methods between components, facilitating installation and disassembly. This not only reduces installation difficulty but also facilitates subsequent maintenance and replacement, lowering maintenance costs and time. Attached Figure Description

[0013] The embodiments of this utility model will be further described below with reference to the accompanying drawings, wherein:

[0014] Figure 1 A schematic diagram of an embodiment of the diaphragm pump is shown;

[0015] Figure 2 A structural schematic diagram of an embodiment of the sealing assembly is shown;

[0016] Attached diagram labels: 1-Pump body, 2-Piston cylinder, 3-Piston cylinder mounting cover, 4-Clamping screw, 5-Piston rod, 6-Piston head, 7-Sealing support ring, 8-Piston sealing ring, 9-Sealing pressure ring, 10-Sealing cover, 11-Clamping bolt. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0018] Reference Appendix Figure 1-2 A diaphragm pump includes a pump body 1, a piston cylinder 2, a piston cylinder mounting cover 3, a clamping screw 4, a piston rod 5, a piston head 6, and a sealing assembly. The pump body 1 has an inlet. One end of the piston cylinder 2 is connected to the inlet, and the other end of the piston cylinder 2 has the piston cylinder mounting cover 3, which has a hole through which the piston rod 5 can pass. One end of the clamping screw 4 passes through the piston cylinder mounting cover 3 and is fixed to the pump body 1. The piston cylinder 2 contains the piston head 6, which has an annular protrusion in the middle and is connected to the piston rod 5. The piston head 6 has a sealing assembly. The sealing assembly includes a sealing support ring 7, a piston sealing ring 8, a sealing pressure ring 9, and a sealing gland 10. The sealing support ring 7 is in close contact with the protrusion on the piston head 6. The piston sealing ring 8 is located on the side of the sealing support ring 7 near the end of the piston head 6. The sealing pressure ring 9 is located on the side of the piston sealing ring 8 near the end of the piston head 6. The end of the piston head 6 is provided with a sealing gland 10, which is L-shaped. One side of the sealing gland 10 presses against the sealing pressure ring 9, and the other side presses against the end face of the piston head 6. The sealing gland 10 is fixed to the piston head 6 by a clamping bolt 11.

[0019] In one embodiment of this utility model, the inner diameter of the piston cylinder 2 is 270-310cm.

[0020] In one embodiment of this utility model, the piston sealing ring 8 is a double-lip sealing ring, which can form an effective sealing contact with the inner wall of the piston cylinder 2 to prevent leakage of working fluid.

[0021] In one embodiment of this utility model, the piston rod 5 and the piston head 6 are connected by threads or pins to ensure that the piston rod 5 can drive the piston head 6 to reciprocate within the piston cylinder 2.

[0022] In one embodiment of this utility model, there are at least two clamping screws 4, which are evenly distributed on the piston rod mounting cover 3.

[0023] In one embodiment of this utility model, the piston head 6 is provided with two sets of sealing components.

[0024] This invention provides a diaphragm pump employing a multi-layer sealing structure, including a sealing support ring, a piston sealing ring, a sealing pressure ring, and a sealing gland, forming multiple sealing barriers to effectively prevent leakage of the working fluid. The double-lip piston sealing ring tightly conforms to the inner wall of the piston cylinder, ensuring good sealing performance even under high pressure or high-speed operation. The sealing support ring closely adheres to the protrusion on the piston head, providing stable support for the piston sealing ring and reducing vibration and impact caused by piston movement, thereby extending the service life of the sealing assembly. Simultaneously, the sealing gland is securely fixed to the piston head with clamping bolts, further enhancing the stability of the entire sealing assembly. The sealing assembly structure of this invention is relatively simple, with clear and straightforward connections and fixation methods between components, facilitating installation and disassembly. This not only reduces installation difficulty but also facilitates subsequent maintenance and replacement, lowering maintenance costs and time.

[0025] The foregoing description describes some exemplary embodiments of this utility model. It is understood that the above embodiments are only used to explain this utility model and do not constitute a limitation on the scope of protection of this utility model. The features in these embodiments can be recombine in a suitable manner, and the resulting solutions are still within the scope of protection claimed by this utility model. Based on the above embodiments, all other embodiments obtained by those skilled in the art without inventive effort, that is, all modifications, equivalent substitutions, and improvements made within the spirit and principles of this application, fall within the scope of protection claimed by this utility model.

Claims

1. A diaphragm pump characterized in that, The pump body (1) includes a piston cylinder (2), a piston cylinder mounting cap (3), a clamping screw (4), a piston rod (5), a piston head (6), and a sealing assembly. The pump body (1) has an inlet, one end of the piston cylinder (2) is connected to the inlet, and the other end of the piston cylinder (2) has the piston cylinder mounting cap (3), which has a hole through which the piston rod (5) can pass. One end of the clamping screw (4) passes through the piston cylinder mounting cap (3) and is fixed to the pump body (1). The piston head (6) is located inside the piston cylinder (2), and the piston head (6) has an annular protrusion in the middle, connecting to the piston rod (5). The sealing assembly is located on the piston head (6). The sealing assembly includes a sealing support ring (7), a piston sealing ring (8), a sealing pressure ring (9), and a sealing cap (10). The sealing support ring (7) is close to the protrusion on the piston head (6). The piston sealing ring (8) is located on the side of the sealing support ring (7) near the end of the piston head (6). The sealing pressure ring (9) is located on the side of the piston sealing ring (8) near the end of the piston head (6). The end of the piston head (6) is provided with the sealing cap (10). The sealing cap (10) is L-shaped. One side of the sealing cap (10) presses on the sealing pressure ring (9), and the other side presses on the end face of the piston head (6). The sealing cap (10) is fixed on the piston head (6) by a clamping bolt (11).

2. A membrane pump according to claim 1, characterized in that The inner diameter of the piston cylinder (2) is 270-310cm.

3. A membrane pump according to claim 1, characterized in that The piston sealing ring (8) is a double-lip sealing ring.

4. A membrane pump according to claim 1, characterized in that The piston rod (5) and the piston head (6) are connected by threads or pins.

5. A membrane pump according to claim 1, characterized in that There are at least two clamping screws (4), which are evenly distributed on the piston rod mounting cover (3).

6. A membrane pump according to claim 1, characterized in that The piston head (6) is provided with two sets of sealing components.

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