High-temperature and high-pressure resistant metal diaphragm metering pump

Abstract

This utility model relates to the field of hydraulic diaphragm metering pump technology, and discloses a high-temperature and high-pressure resistant metal diaphragm metering pump, including a mounting plate. The top of the mounting plate is provided with a drive assembly, a temperature isolation assembly is provided on one side of the drive assembly, and a hydraulic end is provided on one side of the temperature isolation assembly. By using metal material for the diaphragm assembly, the pump's adaptability to high-temperature and high-pressure conditions is improved. Moreover, the three-layer independent metal diaphragm design allows the pump to operate normally even with only two complete diaphragm layers, greatly improving the pump's reliability. By grinding the diaphragm back plate and the pump head together, the fitting accuracy of the clamping surface is increased, as is the friction between the clamping surface and the diaphragm, improving the sealing between the hydraulic chamber and the pump head. This fills the technical gap in domestic metal diaphragm metering pumps for high-temperature and high-pressure conditions, and can adapt to more different market conditions and application scenarios.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic diaphragm metering pump technology, and in particular to a high-temperature and high-pressure resistant metal diaphragm metering pump. Background Technology

[0002] As a core device that enables quantitative fluid delivery, the performance of metering pumps directly determines the stability, safety, and product quality of the production process. Diaphragm metering pumps, due to their structure that uses a diaphragm to isolate the hydraulic chamber and the medium chamber, avoid the risk of dynamic seal leakage and have become the preferred type for conveying high-pressure, toxic, corrosive, or valuable media.

[0003] Existing hydraulic diaphragm metering pumps generally use non-metallic materials as diaphragm materials. When facing high-temperature and high-pressure working conditions, there may be a situation where domestically produced pumps are unavailable. In such cases, our existing domestically produced pumps cannot meet the increasing demands of use, and we can only provide imported products. However, imported products are less competitive in the market due to their high price, long delivery time, and many unstable factors during transportation. Based on this, a high-temperature and high-pressure resistant metal diaphragm metering pump is proposed for improvement. Utility Model Content

[0004] In view of the problem that traditional diaphragm materials and structures are difficult to adapt to high temperature and high pressure conditions, this utility model is proposed.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a high-temperature and high-pressure resistant metal diaphragm metering pump, including a mounting plate, a drive assembly at the top of the mounting plate, a temperature isolation assembly on one side of the drive assembly, a hydraulic end on one side of the temperature isolation assembly, the drive assembly being connected to the hydraulic end through the temperature isolation assembly, a pump head on the hydraulic end, a diaphragm back plate on the hydraulic end, and a diaphragm assembly between the pump head and the diaphragm back plate, the diaphragm assembly including a first metal diaphragm, a second metal diaphragm, and a third metal diaphragm.

[0006] As a preferred embodiment, the diaphragm backplate has a plurality of oil delivery holes on its surface, and the plurality of oil delivery holes are distributed in a circumferential array.

[0007] As a preferred embodiment, a motor is provided above the mounting plate, a speed reducer is provided below the motor, and the output end of the motor is connected to the input end of the speed reducer.

[0008] As a preferred embodiment, the speed reducer is disposed on one side of the drive assembly, and the output end of the speed reducer is connected to the input end of the drive assembly.

[0009] As a preferred embodiment, the mounting plate has a plurality of lifting rings rectangularly distributed at its top end, and the plurality of lifting rings are threadedly connected to the mounting plate.

[0010] As a preferred embodiment, the mounting plate is arranged in a Z-shape, and symmetrical limit grooves are formed at both ends of the mounting plate.

[0011] Compared with the prior art, the present invention has at least the following beneficial effects: 1. This utility model improves the pump's adaptability to high-temperature and high-pressure conditions by using metal materials for the diaphragm assembly. It also adopts a three-layer independent metal diaphragm design, so the pump can still operate normally even with only two complete diaphragm layers, greatly improving the pump's reliability. By grinding the diaphragm back plate and the pump head together, the fitting accuracy of the clamping surface is increased, as is the friction between the clamping surface and the diaphragm, which improves the sealing between the hydraulic chamber and the pump head. This fills the technical gap in metal diaphragm metering pumps under high-temperature and high-pressure conditions in China and can adapt to more different market conditions and application scenarios.

[0012] 2. This utility model, through its dense and uniformly distributed oil delivery holes in a circumferential array, ensures that the pressure of the hydraulic chamber is evenly applied to the surface of the diaphragm assembly, avoiding premature damage to the diaphragm due to excessive local stress caused by uneven pressure distribution. It also ensures the stability of the diaphragm's reciprocating deformation, thereby achieving precise quantitative delivery of fluid. The temperature isolation component effectively protects the motor, reducer, and drive assembly at the drive end from high temperatures, reducing the probability of key components failing due to high temperatures, minimizing equipment downtime for maintenance, and further improving the pump's adaptability to high-temperature conditions. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is an enlarged structural schematic diagram of the hydraulic end and pump head in this utility model; Figure 3 This is a schematic cross-sectional view of the hydraulic end and pump head in this utility model; Figure 4 This is an enlarged structural schematic diagram of the diaphragm backplate in this utility model; Figure 5 This is a side view of the diaphragm assembly of this utility model.

[0014] Explanation of reference numerals in the attached figures: 1. Mounting plate; 11. Lifting ring; 12. Limiting groove; 2. Motor; 3. Reducer; 4. Drive assembly; 5. Temperature isolation assembly; 6. Hydraulic end; 7. Pump head; 8. Diaphragm back plate; 81. Oil delivery through hole; 9. Diaphragm assembly; 91. First metal diaphragm; 92. Second metal diaphragm; 93. Third metal diaphragm. Detailed Implementation

[0015] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0016] Reference Figures 1-5 This is the first embodiment of the present invention, which provides a high temperature and high pressure resistant metal diaphragm metering pump, including a mounting plate 1. The top of the mounting plate 1 is provided with a drive assembly 4. A temperature isolation assembly 5 is provided on one side of the drive assembly 4. A hydraulic end 6 is provided on one side of the temperature isolation assembly 5. The drive assembly 4 is connected to the hydraulic end 6 through the temperature isolation assembly 5. A pump head 7 is provided on the hydraulic end 6. A diaphragm back plate 8 is also provided on the hydraulic end 6. A diaphragm assembly 9 is provided between the pump head 7 and the diaphragm back plate 8. The diaphragm assembly 9 includes a first metal diaphragm 91, a second metal diaphragm 92 and a third metal diaphragm 93. The surface of the diaphragm backplate 8 is provided with a number of oil delivery holes 81, which are arranged in a circumferential array. A motor 2 is located above the mounting plate 1, and a reducer 3 is located below the motor 2. The output end of the motor 2 is connected to the input end of the reducer 3. The reducer 3 is located on one side of the drive assembly 4, and the output end of the reducer 3 is connected to the input end of the drive assembly 4.

[0017] Specifically, after the motor 2 starts, it transmits power to the reducer 3 connected to the input end. The reducer 3 reduces the motor power and increases the torque, and then transmits the appropriate power to the drive assembly 4 to provide the basic power source for the operation of the entire pump body. After receiving power, the drive assembly 4 transmits the power to the hydraulic end 6 through the temperature isolation assembly 5. During this process, the temperature isolation assembly 5 can effectively block the heat generated by the hydraulic end 6 in contact with the high temperature medium from spreading to the drive assembly 4, avoiding damage to precision components such as the drive assembly 4, motor 2 and reducer 3 due to high temperature, and ensuring the stability of power transmission and the service life of the equipment. After the hydraulic end 6 obtains power, the internal hydraulic chamber generates pressure changes. Since the surface of the diaphragm back plate 8 has several oil delivery holes 81 arranged in a circular array, the pressure of the hydraulic chamber can be smoothly applied to the diaphragm assembly 9 through these evenly distributed oil delivery holes 81. The diaphragm assembly 9 is composed of a first metal diaphragm 91, a second metal diaphragm 92 and a third metal diaphragm 93. Under pressure, it undergoes reciprocating deformation, thereby driving the fluid in the pump head 7 to achieve quantitative delivery. This design, by using metal for the diaphragm assembly 9, significantly improves the pump's resistance to high-temperature and high-pressure conditions, reducing the likelihood of leaks caused by diaphragm damage. Furthermore, the use of a three-layer independent metal diaphragm design ensures the pump can still operate normally even with only two intact diaphragms, greatly enhancing its reliability. The diaphragm backplate 8 and pump head 7 are ground together to improve their fit and increase friction with the diaphragm assembly 9, effectively enhancing the seal between the hydraulic chamber and pump head 7, reducing the risk of fluid leakage, and ensuring accurate metering and delivery.

[0018] Reference Figures 1-5 This is the third embodiment of the present utility model. The difference between this embodiment and the second embodiment is that: a plurality of lifting rings 11 are rectangularly distributed at the top of the mounting plate 1, and the plurality of lifting rings 11 are threadedly connected to the mounting plate 1. Mounting plate 1 is arranged in a Z-shape, and limit grooves 12 are symmetrically opened at both ends of mounting plate 1.

[0019] Specifically, the lifting ring 11 and the mounting plate 1 are connected by threads. On the one hand, this ensures the connection strength during hoisting and can withstand the overall weight of the pump body, preventing the lifting ring 11 from falling off during hoisting and causing equipment damage. On the other hand, the lifting ring 11 can be disassembled when hoisting is not required, reducing the protruding structure at the top of the mounting plate 1 and avoiding interference with the layout of surrounding equipment or operating space. The mounting plate 1 is shaped like a "Z" and has symmetrically opened limiting grooves 12 at both ends. These grooves can be precisely matched with the positioning structure on the on-site installation foundation to quickly achieve the installation and positioning of the pump body and avoid positional deviation during installation.

[0020] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A high-temperature and high-pressure resistant metal diaphragm metering pump, comprising a mounting plate (1), characterized in that: The top of the mounting plate (1) is provided with a drive assembly (4), a temperature isolation assembly (5) is provided on one side of the drive assembly (4), a hydraulic end (6) is provided on one side of the temperature isolation assembly (5), the drive assembly (4) is connected to the hydraulic end (6) through the temperature isolation assembly (5), a pump head (7) is provided on the hydraulic end (6), a diaphragm back plate (8) is also provided on the hydraulic end (6), a diaphragm assembly (9) is provided between the pump head (7) and the diaphragm back plate (8), and the diaphragm assembly (9) includes a first metal diaphragm (91), a second metal diaphragm (92) and a third metal diaphragm (93).

2. The high-temperature and high-pressure resistant metal diaphragm metering pump according to claim 1, characterized in that: The diaphragm backplate (8) has several oil delivery holes (81) on its surface, and the several oil delivery holes (81) are arranged in a circular array.

3. The high-temperature and high-pressure resistant metal diaphragm metering pump according to claim 1, characterized in that: A motor (2) is provided above the mounting plate (1), and a speed reducer (3) is provided below the motor (2). The output end of the motor (2) is connected to the input end of the speed reducer (3).

4. The high-temperature and high-pressure resistant metal diaphragm metering pump according to claim 3, characterized in that: The speed reducer (3) is located on one side of the drive assembly (4), and the output end of the speed reducer (3) is connected to the input end of the drive assembly (4).

5. The high-temperature and high-pressure resistant metal diaphragm metering pump according to claim 1, characterized in that: The top of the mounting plate (1) has a rectangular distribution of several lifting rings (11), and the lifting rings (11) are threadedly connected to the mounting plate (1).

6. The high-temperature and high-pressure resistant metal diaphragm metering pump according to claim 1, characterized in that: The mounting plate (1) is arranged in a Z-shape, and the mounting plate (1) has symmetrical limit grooves (12) at both ends.

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