Micro pump for extracting strong corrosive medium

Abstract

The utility model relates to a micro pump for extracting strong corrosive media, which belongs to the technical field of micro pumps and comprises a pump body, and the top of the pump body is fixedly connected with a pump cavity component and a pump cover component. Two suction one-way valves and two discharge one-way valves are arranged at the joint of the pump cavity assembly and the pump cover assembly, sealing assemblies used for enhancing the sealing performance are arranged at the tops of the suction one-way valves and the tops of the discharge one-way valves, and a diaphragm is arranged between the pump body and the pump cavity assembly. Clamping assemblies used for clamping and fixing the diaphragm are arranged on the two sides of the diaphragm. According to the micro pump for extracting the strong corrosive medium, the inner-layer sealing ring and the outer-layer sealing ring are respectively arranged on the mounting surfaces of the suction one-way valve and the discharge one-way valve, so that the sealing performance of the pump body can be effectively improved, and the working reliability of the suction one-way valve and the discharge one-way valve can be effectively enhanced; and the advantages of good sealing performance and good working reliability are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to micro pump technical field, concretely is a kind of micro pump for extracting strong corrosive medium. BACKGROUND

[0002] In industrial production, the extraction and treatment of strong corrosive medium has always been an important and complex problem. These media can include various strong acids, strong bases, corrosive gases or liquids, etc., which put high requirements on the corrosion resistance of equipment. When dealing with such media, traditional pump equipment often faces serious corrosion problems, resulting in shortened equipment life, increased maintenance costs, and even possible safety accidents.

[0003] In recent years, with the continuous progress of material science and manufacturing technology, micro pump technology has developed rapidly. Micro pumps have been widely used in many fields due to their small size, light weight, low power consumption, high control precision and other advantages. Especially in situations where precise control of liquid or gas flow is required, micro pumps have shown their unique advantages.

[0004] Currently, there are some micro pump products on the market for extracting corrosive media, which are mostly made of corrosion-resistant materials such as stainless steel and fluoroplastic, and are treated by special processes to improve their corrosion resistance. However, these products still have some shortcomings when dealing with strong corrosive media.

[0005] Since strong corrosion-resistant materials are usually high-molecular polymer materials, it is difficult to process and manufacture small parts, and traditional micro diaphragm pumps are difficult to achieve good sealing while using strong corrosion-resistant materials, limiting their application in extracting strong corrosive media. It cannot meet the use requirements, so a micro pump for extracting strong corrosive media is proposed to solve the problems mentioned above. INVENTION CONTENTS

[0006] In view of the shortcomings of the prior art, the utility model provides a micro pump for extracting strong corrosive medium, which has good sealing performance and good working reliability, solves the problem of poor sealing performance of the existing micro pump and easy leakage of strong corrosive medium.

[0007] To achieve the above purpose, the utility model provides the following technical scheme: a micro pump for extracting strong corrosive medium, comprising a pump body, the top of the pump body is fixedly connected with a pump cavity assembly, the inside of the pump cavity assembly is respectively provided with two suction one-way valves and two discharge one-way valves, the top of the suction one-way valve and the discharge one-way valve is provided with a sealing assembly for enhancing the sealing performance, the pump body and the pump cavity assembly are provided with a diaphragm, the two sides of the diaphragm are provided with clamping assemblies for clamping and fixing it.

[0008] The sealing assembly comprises four inner sealing rings and one outer sealing ring, the four inner sealing rings are clamped on the top of the suction one-way valve and the discharge one-way valve respectively, and the outer sealing ring is sleeved on the outside of the inner sealing ring and clamped on the top of the pump cavity assembly.

[0009] The clamping assembly comprises a diaphragm inner pressing plate, a diaphragm outer pressing plate and a second screw, the diaphragm inner pressing plate is arranged inside the pump cavity assembly and penetrates the diaphragm, the diaphragm outer pressing plate is arranged inside the pump body and located at the bottom of the diaphragm, and the diaphragm is clamped by the second screw extending to the inside of the diaphragm inner pressing plate.

[0010] Further, the inside of the pump cavity assembly is provided with installation grooves matched with the suction one-way valve and the discharge one-way valve respectively, and the outer diameter of the inner sealing ring is matched with the inner diameter of the installation groove.

[0011] Further, the top of the pump cavity assembly is provided with an opening, and the outer sealing ring is matched with the opening.

[0012] Further, the inside of the diaphragm is provided with a central perforation matched with the diaphragm inner pressing plate, and the inside of the diaphragm outer pressing plate is provided with a placing groove matched with the diaphragm inner pressing plate.

[0013] Further, the top of the pump cavity assembly is fixedly connected with a pump cover assembly, and the outer diameters of the pump body, the pump cavity assembly and the pump cover assembly are matched with each other.

[0014] Further, the pump cover assembly is fixed by a third screw penetrating the pump cavity assembly and extending to the inside of the pump body.

[0015] Compared with the prior art, the micro pump for pumping strong corrosive medium has the following advantages:

[0016] 1. The micro pump for pumping strong corrosive medium, by arranging two suction one-way valves and two discharge one-way valves in the inside of the pump cavity assembly, and arranging two sealing rings of the inner sealing ring and the outer sealing ring on the installation surface of the suction one-way valve and the discharge one-way valve respectively, the sealing performance of the pump body can be effectively improved, and the reliability of the suction one-way valve and the discharge one-way valve can be effectively enhanced, so that the sealing performance and the working reliability are good.

[0017] 2. The micro pump for extracting strong corrosive medium, by setting the diaphragm between the inner diaphragm pressing plate and the outer diaphragm pressing plate, and then connecting the metal parts of the inner diaphragm pressing plate and the outer diaphragm pressing plate by the second screw, the diaphragm is clamped and fixed, the reliability and the sealing performance of the diaphragm connection are effectively ensured, the clamping stability and the sealing performance are good, and in addition, the inner diaphragm pressing plate is made of the metal framework wrapped by the high polymer material resistant to strong corrosion, the problems of the poor sealing performance of the existing micro pump and the easy leakage of the strong corrosive medium are solved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 It is a sectional view of the utility model structure;

[0019] Fig. 2 It is an installation structure explosion drawing of the one-way valve of the utility model.

[0020] In the drawing: 1, pump body;2, pump cavity assembly;3, pump cover assembly;4, suction one-way valve;5, discharge one-way valve;6, inner sealing ring;7, outer sealing ring;8, diaphragm;9, inner diaphragm pressing plate;10, outer diaphragm pressing plate;11, motor;12, eccentric wheel;13, connecting rod;14, first screw;15, second screw;16, third screw. DETAILED DESCRIPTION

[0021] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, instead of all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skill in the art without creative labor belong to the protection scope of the utility model.

[0022] Embodiment one:

[0023] Please refer to Figs. 1-2The micro pump for extracting strong corrosive medium in the embodiment comprises a pump body 1, a pump cavity assembly 2 is fixedly connected to the top of the pump body 1, two suction one-way valves 4 and two discharge one-way valves 5 are arranged in the pump cavity assembly 2 respectively, and a sealing assembly for enhancing the sealing performance is arranged at the top of the suction one-way valves 4 and the discharge one-way valves 5. The sealing assembly comprises four inner sealing rings 6 and one outer sealing ring 7, the four inner sealing rings 6 are clamped at the top of the suction one-way valves 4 and the discharge one-way valves 5 respectively, and the outer sealing ring 7 is sleeved outside the inner sealing rings 6 and clamped at the top of the pump cavity assembly 2. By arranging two suction one-way valves 4 and two discharge one-way valves 5 in the pump cavity assembly 2, and arranging two sealing rings, i.e., the inner sealing rings 6 and the outer sealing ring 7, on the installation surfaces of the suction one-way valves 4 and the discharge one-way valves 5, the sealing performance of the pump body 1 can be effectively improved, and the working reliability of the suction one-way valves 4 and the discharge one-way valves 5 can be effectively enhanced, thereby achieving the advantages of good sealing performance and good working reliability.

[0024] Specifically, installation grooves matched with the suction one-way valves 4 and the discharge one-way valves 5 are arranged in the pump cavity assembly 2, and the outer diameter of the inner sealing ring 6 is matched with the inner diameter of the installation groove.

[0025] Specifically, an opening is arranged at the top of the pump cavity assembly 2, and the outer sealing ring 7 is attached to the opening.

[0026] In the embodiment, a diaphragm 8 is arranged between the pump body 1 and the pump cavity assembly 2, and clamping assemblies for clamping and fixing the diaphragm 8 are arranged on both sides of the diaphragm 8. The clamping assemblies comprise a diaphragm inner pressing plate 9, a diaphragm outer pressing plate 10 and a second screw 15, the diaphragm inner pressing plate 9 is arranged inside the pump cavity assembly 2 and penetrates the diaphragm 8, the diaphragm outer pressing plate 10 is arranged inside the pump body 1 and located at the bottom of the diaphragm 8, and the diaphragm outer pressing plate 10 is internally threadedly connected with the second screw 15 extending into the diaphragm inner pressing plate 9. By arranging the diaphragm 8 between the diaphragm inner pressing plate 9 and the diaphragm outer pressing plate 10, and connecting the metal parts of the diaphragm outer pressing plate 10 and the diaphragm inner pressing plate 9 through the second screw 15, the diaphragm 8 can be clamped and fixed, the reliability and the sealing performance of the connection of the diaphragm 8 can be effectively ensured, and the advantages of stable clamping and good sealing performance are achieved.

[0027] Specifically, a central through hole matched with the diaphragm inner pressing plate 9 is arranged in the diaphragm 8, and a placing groove matched with the diaphragm inner pressing plate 9 is arranged in the diaphragm outer pressing plate 10.

[0028] In the embodiment, a motor 11 extending into the pump body 1 is fixedly installed on the right side of the pump body 1, an eccentric wheel 12 is fixedly installed on the output shaft of the motor 11, and the motor 11 is fixedly connected with the pump body 1 through a first screw 14.

[0029] In this embodiment, a connecting rod 13 extending into the pump body 1 is fixedly connected inside the diaphragm inner pressure plate 9. The end of the connecting rod 13 away from the diaphragm inner pressure plate 9 is connected to the eccentric wheel 12 through a bearing.

[0030] It should be noted that the inner pressure plate 9 of the diaphragm is movably installed inside the pump chamber assembly 2, and the outer pressure plate 10 of the diaphragm is movably installed inside the pump body 1.

[0031] It should be noted that the pump body 1 and the pump chamber assembly 2 are both made of highly corrosion-resistant materials; the suction check valve 4 and the discharge check valve 5 are both made of highly corrosion-resistant materials; the diaphragm 8 is made of highly corrosion-resistant materials; the inner sealing ring 6 and the outer sealing ring 7 are both made of highly corrosion-resistant materials; and the inner pressure plate 9 of the diaphragm is made of a metal skeleton wrapped with highly corrosion-resistant materials.

[0032] Example 2:

[0033] Please see Figs. 1-2 Based on Embodiment 1, the pump cover assembly 3 is fixedly connected to the top of the pump chamber assembly 2, and the outer diameters of the pump body 1, the pump chamber assembly 2, and the pump cover assembly 3 are mutually compatible. The pump cover assembly 3 is fixed by a third screw 16 that penetrates the pump chamber assembly 2 and extends into the pump body 1.

[0034] Specifically, both the pump chamber assembly 2 and the pump body 1 have threaded holes that are compatible with the third screw 16.

[0035] Specifically, the opening at the top of the pump chamber assembly 2 is adapted to the bottom surface of the pump cover assembly 3, which facilitates the clamping and fixing of the outer sealing ring 7.

[0036] It should be noted that the pump cover assembly 3 is made of a highly corrosion-resistant material.

[0037] The working principle of the above embodiments is as follows:

[0038] During installation, the diaphragm 8 is placed between the inner pressure plate 9 and the outer pressure plate 10, and the metal parts of the outer pressure plate 10 and the inner pressure plate 9 are connected by the second screw 15 to clamp and fix the diaphragm 8. Then, the two suction check valves 4 and the two discharge check valves 5 are placed inside the pump chamber assembly 2. The inner sealing ring 6 and the outer sealing ring 7 are then fitted onto the mounting surfaces of the suction check valve 4 and the discharge check valve 5, respectively. After the inner sealing ring 6 and the outer sealing ring 7 are installed, the pump cover assembly 3 is snapped onto the top surface of the pump chamber assembly 2 to lock the outer sealing ring 7. Finally, the pump cover assembly 3, the pump chamber assembly 2, and the pump body 1 are installed and fixed by the third screw 16.

[0039] In use, the controller starts the motor 11 to drive the eccentric wheel 12 to rotate. The rotation of the eccentric wheel 12 drives the connecting rod 13 to move up and down. The up and down movement of the connecting rod 13 causes the diaphragm 8 to reciprocate. Then, under the action of the one-way valve, the gas or liquid is drawn into the pump chamber and then discharged, thus realizing the transportation of the medium.

[0040] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods. Any method that can achieve its beneficial effect can be implemented. In addition, the electrical components in this embodiment are all electrically connected to the main controller and the power supply. The main controller can be a conventional known device such as a computer that plays a control role. Those skilled in the art can control the electrical components through simple programming. Moreover, the existing disclosed power connection technology is also common knowledge in the field. Therefore, the specific structural composition and working principle will not be described in detail in this embodiment.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A miniature pump for pumping highly corrosive media, comprising a pump body (1), characterized in that: The top of the pump body (1) is fixedly connected to the pump chamber assembly (2) and the pump cover assembly (3). The joint surfaces of the pump chamber assembly (2) and the pump cover assembly (3) are respectively provided with two suction check valves (4) and two discharge check valves (5). The top of the suction check valves (4) and the discharge check valves (5) are provided with sealing components to enhance sealing performance. A diaphragm (8) is provided between the pump body (1) and the pump chamber assembly (2). Clamping components for clamping and fixing the diaphragm (8) are provided on both sides of the diaphragm (8). The sealing assembly includes four inner sealing rings (6) and one outer sealing ring (7). The four inner sealing rings (6) are respectively snapped onto the top of the suction check valve (4) and the discharge check valve (5). The outer sealing ring (7) is sleeved on the outside of the inner sealing rings (6) and snapped onto the top of the pump chamber assembly (2). The clamping assembly includes an inner diaphragm pressure plate (9), an outer diaphragm pressure plate (10), and a second screw (15). The inner diaphragm pressure plate (9) is disposed inside the pump chamber assembly (2) and penetrates the diaphragm (8). The outer diaphragm pressure plate (10) is disposed inside the pump body (1) and located at the bottom of the diaphragm (8). The outer diaphragm pressure plate (10) clamps the diaphragm (8) by the second screw (15) extending into the inner diaphragm pressure plate (9).

2. A micro pump for pumping highly corrosive media according to claim 1, characterized in that: The pump chamber assembly (2) has mounting grooves that are adapted to the suction check valve (4) and the discharge check valve (5) respectively. The outer diameter of the inner sealing ring (6) is adapted to the inner diameter of the mounting groove.

3. A micro pump for pumping highly corrosive media according to claim 1, characterized in that: The pump chamber assembly (2) has an opening at its top, and the outer sealing ring (7) fits into the opening.

4. A micro pump for pumping highly corrosive media according to claim 1, characterized in that: The diaphragm (8) has a central perforation that matches the inner pressure plate (9) of the diaphragm, and the outer pressure plate (10) of the diaphragm has a placement groove that matches the inner pressure plate (9) of the diaphragm.

5. A micro pump for pumping highly corrosive media according to claim 1, characterized in that: The top of the pump chamber assembly (2) is fixedly connected to the pump cover assembly (3), and the outer diameters of the pump body (1), the pump chamber assembly (2) and the pump cover assembly (3) are adapted to each other.

6. A micro pump for pumping highly corrosive media according to claim 5, characterized in that: The pump cover assembly (3) is secured by a third screw (16) that penetrates the pump chamber assembly (2) and extends into the pump body (1).

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