A diaphragm metering pump

Abstract

The utility model relates to the technical field of metering pump, and disclose a diaphragm type metering pump, including the shell, the outer wall of shell is installed through welding or bolt fixed mode and has the liquid inlet and outlet part, the outer wall of liquid inlet and outlet part detachably clamps the installation and has the protection component for collecting pipeline connection place leakage liquid, the outer wall of protection component and liquid inlet and outlet part are set up in conjunction with, the utility model discloses a protection component is set up, through the design of two fan -shaped splicing type receiving bin, the key connecting parts of liquid inlet and outlet part can be completely surrounded after combination, realizes the collection to leakage liquid, through the bolt position adaptation of the mounting groove of receiving bin top and flange ring no.

Description

Technical Field

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

[0002] A diaphragm metering pump is a precision positive displacement pump that uses a flexible diaphragm as its working component, and is a special type of positive displacement pump. This type of pump achieves precise fluid delivery and metering through the reciprocating motion of the diaphragm, making it particularly suitable for industrial applications requiring high-precision dosing or delivery of corrosive, toxic, expensive, or high-viscosity media. The diaphragm seal design completely isolates the transported medium from the pump's drive mechanism, thus avoiding leakage and contamination problems. Diaphragm pumps have become an indispensable key piece of equipment in modern process industries. Due to their unique advantages, diaphragm metering pumps are widely used in industries such as water conservancy, chemical, power, and food processing, and are an indispensable piece of equipment in modern industrial production.

[0003] The inlet and outlet of a diaphragm metering pump are key interfaces for media transport, typically using flange connections to achieve a sealed connection with external pipelines. O-rings are pre-installed on the inner side of the flange mating surfaces. The pressure generated by tightening bolts deforms the O-rings, filling tiny gaps in the flange surface and preventing leakage. However, under long-term operation or specific unexpected conditions, liquid may still breach the seal and leak from the gap between the two flanges. If the transported medium is corrosive (such as sulfuric acid or sodium hydroxide), the leaked liquid dripping onto the pump's drive mechanism (such as the servo motor and drive shaft) can corrode metal components, causing short circuits in the motor, jamming of the drive shaft, and sudden pump shutdown. Even when transporting ordinary water-based media, long-term leakage can cause moisture to accumulate in the electrical components around the flange, increasing the risk of electrical leakage and posing a safety hazard to workshop operations.

[0004] Therefore, a diaphragm metering pump was designed. Utility Model Content

[0005] This utility model addresses the shortcomings of existing technologies by providing a diaphragm metering pump. It solves the problems of commonly used flange connections at the inlet and outlet of diaphragm metering pumps, which rely on sealing rings for sealing. Under long-term operation or accidental events, liquid may leak. Corrosive media can corrode the drive mechanism, causing the pump to stop suddenly, and ordinary water-based media can cause surrounding electrical appliances to become damp, increasing the risk of electric leakage.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A diaphragm metering pump includes a housing, on which inlet and outlet components are installed by welding or bolting. A protective component for collecting leakage liquid at pipe connections is detachably snapped onto the outer wall of the inlet and outlet components, and the protective component is fitted into the outer wall of the inlet and outlet components.

[0007] Preferably, the inlet and outlet components include an inlet pipe for conveying the fluid to be metered and an outlet pipe for discharging the metered fluid. Protective components are respectively snapped onto the pipe body connection of the inlet pipe and the pipe body connection of the outlet pipe to protect the critical leakage points of the inlet and outlet channels.

[0008] Preferably, a flange ring one is integrally formed or fixedly installed at the free end of the liquid outlet pipe away from the outer shell. A connecting pipe for extending the liquid outlet channel is correspondingly provided above the flange ring one. A flange ring two that matches the flange ring one is integrally formed or fixedly installed at the bottom end of the connecting pipe. The flange ring one and the flange ring two are fixed through bolts that are evenly distributed around the circumference to ensure the sealing stability of the connection part.

[0009] Preferably, the protective component includes two symmetrical receiving chambers, both of which are fan-shaped with a central angle of degrees. The splicing surfaces of the two receiving chambers fit together to form a complete circular structure, which can completely cover the connection between flange ring one and flange ring two.

[0010] Preferably, arc-shaped mounting grooves are respectively provided at the top edges of the two receiving compartments. The number, position and size of the mounting grooves are adapted to the bolt positions on the outer walls of flange ring one and flange ring two, so that the bolts can pass through the mounting grooves without affecting the installation and fixing of the receiving compartments.

[0011] Preferably, inclined plates are fixedly installed on the inner bottom walls of the two receiving chambers. The inclined plates are designed to be inclined towards the inside of the receiving chamber, and the top of the inclined plates is in close contact with the bottom edge of the flange ring, which can guide the leakage liquid to the bottom collection area of ​​the receiving chamber along the inclined direction.

[0012] Preferably, drainage pipes are fixedly installed at the bottom of the outer walls of the two receiving chambers. The internal channels of the drainage pipes are connected to the internal collection area of ​​the receiving chambers, and the outer ends of the drainage pipes are fitted with plugs for sealing. The collected leakage liquid can be discharged and treated by removing the plugs.

[0013] Preferably, elastic buckles are symmetrically fixed at the top and bottom edges of the two receiving compartments, with the buckle on one receiving compartment protruding outward and the buckle on the other receiving compartment protruding inward. The buckles on the outer walls of the two receiving compartments face opposite directions, which facilitates mutual locking and fixing.

[0014] Preferably, the top and bottom edges of the two receiving compartments are respectively provided with slots that match the buckles. The position, shape and size of the four slots are respectively matched with the corresponding buckles, and the two receiving compartments can be detachably fixed by the buckles and slots engaging.

[0015] Preferably, a sealing rubber strip is fixedly affixed to the outer wall of the side where one of the receiving compartments interlocks with the other receiving compartment. The sealing rubber strip can fill the gap at the joint of the two receiving compartments and improve the overall sealing performance of the protective component.

[0016] Compared with the prior art, the present invention has the following beneficial effects: This invention utilizes a protective component and a two-fan-shaped, interlocking receiving chamber design. When combined, these chambers completely surround the critical connection points of the inlet and outlet components, effectively collecting leaked liquid. The mounting groove on the top of the receiving chamber aligns with the bolt positions of flange ring one and flange ring two, ensuring both pipeline connection stability and rapid installation, significantly improving operational efficiency. An internally inclined plate tightly abuts against the bottom of the flange ring, efficiently intercepting leaked liquid and guiding it to the bottom of the chamber for centralized treatment. A drainage pipe on the outer wall, combined with a threaded plug, allows for controlled drainage of leaked liquid and sealing of the chamber. The interlocking of oppositely oriented buckles and slots facilitates easy assembly and disassembly of the two receiving chambers, and the sealing rubber strip at the joint effectively fills gaps, significantly improving overall sealing and preventing leaked liquid overflow. Furthermore, the protective component is made of chemically resistant materials, effectively preventing leaked liquid from harming surrounding equipment, personnel, and the environment. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a front cross-sectional view of the outer shell of this utility model; Figure 3 This is a schematic diagram of the overall front cross-sectional structure of this utility model; Figure 4 This utility model Figure 3 A magnified structural diagram of A in the middle; Figure 5 This is an exploded structural diagram of the liquid inlet / outlet component and the protective component of this utility model; Figure 6 This is a schematic diagram of the explosion structure of the protective component of this utility model.

[0019] Drawing number explanation: 1. Housing; 11. Motor mounting base; 12. Ball screw; 13. Drive shaft; 14. Anti-rotation bearing; 15. Solenoid valve; 16. Pump intermediate body; 17. Ceramic bushing; 18. Piston assembly; 19. Piston valve cylinder; 2. Inlet and outlet components; 21. Inlet pipe; 22. Outlet pipe; 221. Flange ring one; 23. Connecting pipe; 231. Flange ring two; 3. Protective components; 30. Receiving chamber; 31. Inclined plate; 32. Mounting groove; 33. Drain pipe; 34. Snap fastener; 35. Slot. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings.

[0021] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious modifications will be apparent to those skilled in the art. The basic principles of the present invention defined in the following description can be used in other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0022] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal", "lateral", "up", "down", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or position based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this utility model and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0023] It is understood that the term "a" should be understood as "at least one" or "one or more," that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0024] Example 1: Please see Figure 1-6 A diaphragm metering pump includes a housing 1 made of a high-strength, corrosion-resistant material. An inlet / outlet component 2 is securely mounted on the outer wall of the housing 1 using welding, bolting, or other methods. A protective component 3 for collecting leaked liquid is snap-fitted onto the outer wall of the inlet / outlet component 2. The protective component 3 is typically made of a chemically resistant material and effectively collects any leaked liquid, preventing it from entering the surrounding environment and thus protecting surrounding equipment, personnel, and the environment, ensuring the safe and stable operation of the entire pump. The inlet / outlet component 2 includes an inlet pipe 21 and an outlet pipe 22. The inlet pipe 21 is responsible for introducing external fluid into the diaphragm metering pump. Protective components 3 are respectively snap-fitted onto the inlet pipe 21 and the outlet pipe 22. These components protect against potential leakage during the inlet and outlet processes, preventing fluid from leaking into the surrounding environment. Whether it's liquid seepage due to loose pipe connections during the inlet stage or leakage due to pressure fluctuations during the outlet stage, the protective components 3 can collect the leaks promptly and effectively, improving the reliability and safety of the entire metering pump system. A flange ring 221 is fixedly installed at the free end of the outlet pipe 22. This flange ring 221 is connected to the outlet pipe 22 by welding. A connecting pipe 23 is installed above the flange ring 221. The connecting pipe 23 connects the outlet pipe 22 to other equipment or pipelines to achieve fluid transmission. Its material is compatible with the outlet pipe 22 to meet the requirements of fluid transport. A flange ring 231 is fixedly installed at the bottom end of the connecting pipe 23. The flange ring 221 and flange ring 231 are fixed together by bolts. This bolted connection allows for a detachable connection between the outlet pipe 22 and the connecting pipe 23. The protective component 3 includes two receiving chambers 30, which are designed in a fan shape and together form a complete circle. The two fan-shaped receiving chambers 30 combined into a circle can tightly surround the outer wall of the inlet / outlet component 2, forming a complete collection space to ensure effective collection of leaked liquid and effectively prevent liquid from leaking from gaps.

[0025] Each of the two receiving chambers 30 has a mounting groove 32 on its top. The position of the mounting groove 32 is adapted to the bolt positions on the outer walls of flange ring 221 and flange ring 231. The mounting groove 32 allows the protective component 3 to be installed around flange ring 221 and flange ring 231. By adapting to the bolt positions, the installation accuracy of the protective component 3 is ensured, allowing it to be stably fixed to the inlet / outlet liquid component 2. During equipment installation, the operator only needs to align the mounting groove 32 of the protective component 3 with the bolts to quickly complete the installation, greatly improving installation efficiency and reducing the problem of poor protective effect caused by inaccurate installation. Each of the two receiving chambers 30 is equipped with an inclined plate 31. The inclined plate 31 is designed to be tilted, and its top end abuts against the bottom of the flange ring 221. The tilted design of the inclined plate 31 guides the leaking liquid along the inclined plate 31 to the bottom of the receiving chamber 30. At the same time, the abutment against the bottom of the flange ring 221 ensures effective interception and diversion of the leaking liquid at the flange connection. When leaking liquid occurs, the inclined plate 31 can promptly guide the liquid to the bottom of the receiving chamber 30 for subsequent centralized treatment.

[0026] Two drainage pipes 33 are fixedly installed on the outer walls of the two receiving chambers 30. The drainage pipes 33 are connected to the receiving chambers 30 and have plugs threaded onto their outer ends. The drainage pipes 33 facilitate the drainage of the leachate collected in the receiving chambers 30, making subsequent treatment and discharge convenient. The plugs are threaded onto the outer ends of the drainage pipes 33, effectively sealing them when drainage is not required, preventing liquid leakage and the entry of external impurities. The top and bottom of the two receiving chambers 30 are respectively fixedly installed with buckles 34, and the buckles 34 on the outer walls of the two receiving chambers 30 are oriented in opposite directions. The design of the buckles 34 in opposite directions allows the two receiving chambers 30 to cooperate with each other to form a connection when they are snapped together. In the actual installation process, the operator only needs to align the buckles 34 of the two receiving chambers 30 with each other and snap them together to complete the installation of the protective component 3. The top and bottom of each of the two receiving chambers 30 are provided with slots 35, and the four slots 35 are respectively engaged with the corresponding buckles 34. The engagement of the slots 35 and the buckles 34 allows the protective component 3 to be installed on the liquid inlet / outlet component 2. A sealing rubber strip is fixedly installed on the outer wall of the side where one of the receiving chambers 30 interlocks with the other. The sealing rubber strip can effectively fill the gap when the two receiving chambers 30 are interlocked, improve the sealing performance of the protective component 3, prevent leakage from overflowing from the interlocking point, further enhance the collection effect of leakage, and ensure the safety of the surrounding environment of the equipment.

[0027] The outer casing 1 mainly consists of a rear drive assembly, a pump intermediate body 16, a pump head 120, a piston assembly 18, and a solenoid valve 15. The back-end drive components are mainly divided into two categories: pneumatic drive components and servo-controlled drive components. This product is mainly a servo-driven control component. The component mounts the servo motor through the motor mounting bracket 11 and uses a coupling to connect the ball screw 12 to the motor spindle. When the motor starts, it drives the rotation of the ball screw 12.

[0028] Inside the pump intermediate body 16, the drive shaft 13 is connected to the ball screw 12. The drive shaft 13, ceramic bushing 17 and piston assembly 18 are connected. When the motor drives the ball screw 12 to rotate, the anti-rotation bearing 14 restricts the rotation of the ball screw 12 nut mounting seat, so the ball screw 12 will move back and forth with the drive shaft 13. At the same time, the drive shaft 13 will also move with the piston assembly 18.

[0029] A piston valve cylinder 19 is fixedly installed on the outer casing 1 near the pump head 120. The pump head 120 has two connectors: an inlet pipe 21 and an outlet pipe 22. The pump is sealed by a diaphragm, and the material inlet and outlet are controlled by the opening and closing of the diaphragm. It mainly adopts a bottom-inlet, top-outlet configuration, with the material inlet pipe 21 located below the pump head 120 and the outlet pipe 22 located above the pump head 120.

[0030] In the initial state, the motor drives the ball screw 12 nut mounting seat forward at low speed. When the mounting seat touches the mechanical limit block, the servo motor detects the torque change, stops moving forward, and retracts 0-1mm as the zero position.

[0031] After the servo motor starts, the plunger retracts from the zero position, the solenoid valve 15 is energized, and the inlet diaphragm opens, creating a pressure difference between the inside and outside of the pump body, drawing the material into the pump body cavity. The plunger's stroke can be changed by controlling the servo motor. At the same time, the program controls the opening and closing of the inlet and outlet diaphragms according to the movement state of the piston assembly 18, thereby changing the injection volume. The greater the plunger's stroke, the greater the injection volume.

[0032] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the stated principles, the implementation of the present invention may have any variations or modifications.

Claims

1. A diaphragm metering pump, characterized in that, Includes an outer shell (1), on which an inlet / outlet component (2) is installed by welding or bolting. On the outer wall of the inlet / outlet component (2), a protective component (3) for collecting leakage liquid at the pipe connection is detachably snapped on. The protective component (3) is fitted to the outer wall of the inlet / outlet component (2).

2. The diaphragm metering pump according to claim 1, characterized in that: The liquid inlet and outlet component (2) includes an inlet pipe (21) for conveying the fluid to be metered and an outlet pipe (22) for discharging the metered fluid. Protective components (3) are respectively snapped onto the pipe body connection of the inlet pipe (21) and the pipe body connection of the outlet pipe (22).

3. A diaphragm metering pump according to claim 2, characterized in that: The free end of the outlet pipe (22) away from the outer shell (1) is integrally formed or fixedly installed with a flange ring one (221). A connecting pipe (23) for extending the outlet channel is provided above the flange ring one (221). The bottom end of the connecting pipe (23) is integrally formed or fixedly installed with a flange ring two (231) that matches the flange ring one (221). The flange ring one (221) and the flange ring two (231) are fixed through bolts that are evenly distributed in the circumference.

4. A diaphragm metering pump according to claim 3, characterized in that: The protective component (3) includes two symmetrical receiving chambers (30), and the splicing surfaces of the two receiving chambers (30) fit together to form a complete circular structure.

5. A diaphragm metering pump according to claim 4, characterized in that: The top edges of the two receiving chambers (30) are respectively provided with arc-shaped mounting grooves (32), and the number, position and size of the mounting grooves (32) are adapted to the bolt positions on the outer walls of flange ring one (221) and flange ring two (231).

6. A diaphragm metering pump according to claim 5, characterized in that: Inclined plates (31) are fixedly installed on the inner bottom walls of the two receiving chambers (30), and the top of the inclined plates (31) is in close contact with the bottom edge of the flange ring (221).

7. A diaphragm metering pump according to claim 6, characterized in that: Drainage pipes (33) are fixedly installed at the bottom of the outer walls of the two receiving chambers (30). The internal channels of the drainage pipes (33) are connected to the internal collection area of ​​the receiving chambers (30), and a plug for sealing is installed at the outer end of the drainage pipes (33) through threaded connection.

8. A diaphragm metering pump according to claim 7, characterized in that: Two receiving chambers (30) are symmetrically fixed with elastic buckles (34) at their top and bottom edges respectively. The buckle (34) on one receiving chamber (30) protrudes outward, and the buckle (34) on the other receiving chamber (30) protrudes inward. The buckles (34) on the outer walls of the two receiving chambers (30) are in opposite directions.

9. A diaphragm metering pump according to claim 8, characterized in that: The top and bottom edges of the two receiving compartments (30) are respectively provided with slots (35) that match the buckles (34). The position, shape and size of the four slots (35) are respectively matched with the corresponding buckles (34).

10. A diaphragm metering pump according to claim 9, characterized in that: A sealing rubber strip is fixedly pasted on the outer wall of the side where one of the receiving chambers (30) and the other receiving chamber (30) interlock.

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