Exhaust structure suitable for multi-stage diaphragm pump

Abstract

The utility model discloses an exhaust structure suitable for a multistage diaphragm pump, which comprises a driving shaft and an eccentric connecting rod arranged on the driving shaft, the top end of the eccentric connecting rod is sleeved with a diaphragm assembly, and the upper end part of the eccentric connecting rod is provided with an air inlet channel, an air supply channel and an exhaust channel. The air inlet channel is transversely arranged at the upper end of the eccentric connecting rod and located below the diaphragm assembly, and the exhaust channel is transversely arranged on the eccentric connecting rod and located below the air inlet channel. The eccentric connecting rod is simple in structure and convenient and fast to use, the exhaust structure and the protective membrane are arranged at the upper end of the eccentric connecting rod, when the eccentric connecting rod moves, internal gas can be exhausted and sent out through the exhaust structure, the central end face of the protective membrane abuts against the gas inlet channel, a closed state is formed, and the service life of the eccentric connecting rod is prolonged. When the eccentric connecting rod moves upwards, the air inlet channel is far away from the protective diaphragm, so that air flows in and is discharged outwards, a stable vacuum state is kept in the cavity, and use of the diaphragm pump is prevented from being affected by the air.

Description

Technical Field

[0001] The utility model relates to the technical field of diaphragm pumps, in particular to an exhaust structure suitable for a multi-stage diaphragm pump. Background Art

[0002] Diaphragm pumps, also known as control pumps, are the main type of actuators. They receive control signals output by the control unit and use power to change the fluid flow rate. Their biggest advantages are small size, oil-free and pollution-free, which enables them to be widely used in all walks of life. Diaphragm pumps mainly use motors to drive the connecting rod to move up and down, and the changes in internal volume produce changes in pressure, forming a process of suction and exhaust, so that the cavity and the container connected to it form a closed vacuum state.

[0003] However, during long-term use, gas will seep into the diaphragm pump, causing damage to the diaphragm during operation. Therefore, it is necessary to discharge the internal gas to the outside in time to avoid affecting the normal use of the diaphragm pump.

[0004] Therefore, it is necessary to study a new technical solution to solve the above problems. Utility Model Content

[0005] In view of this, the present invention aims to solve the deficiencies in the prior art, and its main purpose is to provide an exhaust structure suitable for a multi-stage diaphragm pump.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] The eccentric connecting rod is controlled by the driving shaft to rotate, so that the eccentric connecting rod realizes up and down reciprocating motion, and the air inlet duct moves upward and away from the center end of the protective diaphragm, so that the gas in the diaphragm assembly enters into the diaphragm assembly, flows into the diaphragm assembly and discharges the gas.

[0008] As a preference, the protective film sheet has a bowl-shaped structure, and a through hole that penetrates up and down and through which the eccentric connecting rod passes is provided at the central end thereof. The inner central edge of the protective film sheet abuts against the air inlet passage, and the upper end portion of the protective film sheet abuts against the lower end surface of the diaphragm assembly, so as to form a sealed cavity inside. The eccentric connecting rod moves upward, so that the air inlet passage is away from the protective film sheet, so that the internal gas enters the air inlet passage and is discharged outward.

[0009] As a preference, an exhaust insertion pipe and an exhaust valve are installed on the exhaust passage. One end of the exhaust insertion pipe is inserted into the exhaust passage, and the other end is for the exhaust valve to be installed and fixed and to discharge gas outward.

[0010] As a preference, the number of the eccentric connecting rods is set to be plural. The lower ends of the plural eccentric connecting rods are sleeved on the driving shaft and drive the eccentric connecting rods to perform reciprocating up and down movements. The number of the diaphragm assemblies and the protective film sheets is the same as the number of the eccentric connecting rods.

[0011] As a preference, the upper ends of the plural eccentric connecting rods are respectively distributed in four different directions. The four eccentric connecting rods facing different directions are set as a group, and plural groups of eccentric connecting rods are provided on the driving shaft.

[0012] As a preference, a pump body frame is further included. A plurality of openings corresponding to the facing positions of the eccentric connecting rods are provided on the pump body frame. The diaphragm assembly at the upper end of the eccentric connecting rod is located at the lower inner end of the opening of the pump body frame, and the upper edge surface of the diaphragm assembly abuts against the lower inner end surface of the opening. An end cover is further provided at the outer end of the pump body frame. The end cover is installed and fixed at the opening of the pump body frame, and a chamber is formed inside the pump body frame.

[0013] As a preference, the number of the end covers is set to be plural. The plural end covers are installed and fixed at the openings of the pump body frame and are spaced apart and distributed on the four faces of the pump body frame.

[0014] As a preference, a through hole that penetrates up and down is provided on the end cover. A trachea is further connected to the outer end of the end cover. One end of the trachea is connected to the through hole of the end cover, and the other end extends to the tail end of the pump body frame for collecting and processing. The gas inside the pump body frame is discharged outward through the through hole by the trachea and is collected and processed uniformly.

[0015] As a preference, a driving motor is further included. The driving motor is arranged at one side end of the driving shaft and is connected thereto for controlling the driving shaft to rotate.

[0016] As a preference, the diaphragm assembly includes a support disk, an upper diaphragm and a shock-absorbing disk. The support disk is installed at the top end of the eccentric connecting rod. The shock-absorbing disk is installed and fixed at the center of the support disk. The upper diaphragm is arranged between the support disk and the shock-absorbing disk.

[0017] Compared with the prior art, the utility model has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solutions:

[0018] The utility model has a simple structure and is convenient and fast to use. By providing an exhaust structure and a protective diaphragm at the upper end of the eccentric connecting rod, when the eccentric connecting rod moves, the gas inside can be discharged outwards through the exhaust structure, and the central end face of the protective diaphragm abuts against the air inlet passage to form a sealed state. When the eccentric connecting rod moves upwards, the air inlet passage moves away from the protective diaphragm, so as to facilitate the inflow and outward discharge of gas, thereby keeping a stable vacuum state in the cavity and avoiding the influence of gas on the use of the diaphragm pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 is a schematic diagram of the overall structure of the utility model.

[0021] Figure 2 is a schematic diagram of the overall structure of the utility model from another perspective.

[0022] Figure 3 is a schematic diagram of the internal disassembled structure of the utility model.

[0023] Figure 4 is a schematic diagram of the assembled structure of the internal eccentric connecting rod of the utility model.

[0024] Figure 5 is a schematic diagram of the structure of the eccentric connecting rod of the utility model.

[0025] Figure 6 is a schematic diagram of the partial sectional structure of the eccentric connecting rod of the utility model.

[0026] Among them, the reference numerals in the drawings:

[0027] 100, drive shaft; 200, eccentric connecting rod; 210, air inlet passage; 220, air delivery passage; 230, exhaust passage; 231, exhaust insertion tube; 232, exhaust valve; 300, diaphragm assembly; 310, support plate; 320, upper diaphragm; 330, shock absorption plate; 400, protective diaphragm; 410, through hole; 500, pump body frame; 510, opening; 520, end cover; 521, air pipe; 600, drive motor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clear and understandable, the following further details the present application in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0029] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0030] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0031] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more unless otherwise specifically defined.

[0032] In order to make the purpose, technical solutions and advantages of the present utility model more clear and understandable, the following further details the present utility model in conjunction with the accompanying drawings and embodiments.

[0033] Refer to the attached Figure 1-6As shown: An exhaust structure applicable to a multi-stage diaphragm pump, including a drive shaft 100 and an eccentric connecting rod 200 arranged on the drive shaft 100. A diaphragm assembly 300 is sleeved on the top end of the eccentric connecting rod 200. An air inlet passage 210, an air delivery passage 220, and an exhaust passage 230 are provided at the upper end of the eccentric connecting rod 200. The air inlet passage 210 is horizontally arranged at the upper end of the eccentric connecting rod 200 and is located below the diaphragm assembly 300. The exhaust passage 230 is horizontally arranged on the eccentric connecting rod 200 and is located below the air inlet passage 210. The air delivery passage 220 is longitudinally arranged at the inner end of the eccentric connecting rod 200 and communicates with the air inlet passage 210 and the exhaust passage 230 at both ends respectively. A protective diaphragm 400 is further provided on the outer side of the upper end of the eccentric connecting rod 200. The central end of the protective diaphragm 400 is located outside the air inlet passage 210 and abuts to form a sealed state. The eccentric connecting rod 200 is controlled by the drive shaft 100 to rotate, so that the eccentric connecting rod 200 realizes up-and-down reciprocating motion, and the air inlet passage 210 moves upward away from the central end of the protective diaphragm 400, enabling the gas in the diaphragm assembly 300 to enter the air inlet passage 210, flow along the air delivery passage 220, and then be discharged outward through the exhaust passage 230.

[0034] In this embodiment, the protective diaphragm 400 has a bowl-shaped structure, and a through hole 410 that penetrates up and down and allows the eccentric connecting rod 200 to pass through is provided at its central end. The central inner edge of the protective diaphragm 400 abuts against the air inlet passage 210, and the upper end of the protective diaphragm 400 abuts against the lower end face of the diaphragm assembly 300, thereby forming a sealed cavity inside. The eccentric connecting rod 200 moves upward, so that the air inlet passage 210 moves away from the protective diaphragm 400, enabling the internal gas to enter the air inlet passage 210 and be discharged outward.

[0035] In this embodiment, an exhaust insertion tube 231 and an exhaust valve 232 are installed on the exhaust passage 230. One end of the exhaust insertion tube 231 is inserted into the exhaust passage 230, and the other end is for installing and fixing the exhaust valve 232 and discharging gas outward.

[0036] In this embodiment, the number of the eccentric connecting rods 200 is set to be plural. The lower ends of the plural eccentric connecting rods 200 are sleeved on the drive shaft 100 and drive the eccentric connecting rods 200 to perform up-and-down reciprocating motion. The number of the diaphragm assemblies 300 and the protective diaphragms 400 is the same as that of the eccentric connecting rods 200.

[0037] In this embodiment, the upper ends of the plural eccentric connecting rods 200 are respectively distributed in four different directions. The four eccentric connecting rods 200 facing different directions are set as a group, and plural groups of eccentric connecting rods 200 are provided on the drive shaft 100.

[0038] In the present embodiment, a pump body frame 500 is further included, and a plurality of openings 510 corresponding to the orientation of the eccentric connecting rod 200 are formed on the pump body frame 500. The diaphragm assembly 300 at the upper end of the eccentric connecting rod 200 is located at the lower inner end of the opening 510 of the pump body frame 500, and the upper end edge surface of the diaphragm assembly 300 is abutted against the lower inner end surface of the opening 510. An end cover 520 is also provided at the outer end of the pump body frame 500. The end cover 520 is installed and fixed at the opening 510 of the pump body frame 500 to form a chamber in the pump body frame 500.

[0039] In this embodiment, the number of the end covers 520 is set to be plural, and the plural end covers 520 are installed and fixed at the opening 510 of the pump body frame 500 and are distributed at intervals on the four surfaces of the pump body frame 500.

[0040] In this embodiment, the end cover 520 is provided with an air hole that runs through from top to bottom, and the outer end of the end cover 520 is also connected to an air pipe 521. One end of the air pipe 521 is connected to the air hole of the end cover 520, and the other end extends to the tail end of the pump body frame 500 for collection and processing. The gas in the pump body frame 500 is discharged outward through the air hole and the air pipe 521 for unified collection and processing.

[0041] In this embodiment, a driving motor 600 is further included. The driving motor 600 is disposed at one side end of the driving shaft 100 and connected thereto, and is used to control the driving shaft 100 to rotate.

[0042] In this embodiment, the diaphragm assembly 300 includes a support plate 310, an upper diaphragm 320 and a shock-absorbing plate 330. The support plate 310 is installed on the top of the eccentric connecting rod 200, and the shock-absorbing plate 330 is installed and fixed at the center of the support plate 310. The upper diaphragm 320 is arranged between the support plate 310 and the shock-absorbing plate 330.

[0043] The above are only preferred embodiments of the present invention, and only specifically describe the technical principles of the present invention. These descriptions are only for the purpose of explaining the principles of the present invention, and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanation here, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention, and other specific implementation methods of the present invention that can be associated with by technicians in this field without creative labor, should be included in the scope of protection of the present invention.

Claims

1. An exhaust structure applicable to a multi-stage diaphragm pump, characterized in that: It includes a drive shaft and an eccentric connecting rod arranged on the drive shaft. A diaphragm assembly is sleeved on the top end of the eccentric connecting rod. An air inlet channel, an air delivery channel and an exhaust channel are arranged at the upper end of the eccentric connecting rod. The air inlet channel is horizontally arranged at the upper end of the eccentric connecting rod and is located below the diaphragm assembly. The exhaust channel is horizontally arranged on the eccentric connecting rod and is located below the air inlet channel. The air delivery channel is longitudinally arranged at the inner end of the eccentric connecting rod and connects the two ends to the air inlet channel and the exhaust channel respectively. A protective diaphragm is also arranged on the outer side of the upper end of the eccentric connecting rod. The central end of the protective diaphragm is located outside the air inlet channel and abuts to form a sealed state. The eccentric connecting rod is controlled by the drive shaft to rotate, so that the eccentric connecting rod realizes up-and-down reciprocating motion, and the air inlet channel moves upward away from the central end of the protective diaphragm, so that the gas in the diaphragm assembly enters the air inlet channel, flows along the air delivery channel, and is discharged outward through the exhaust channel.

2. The exhaust structure applicable to a multi-stage diaphragm pump according to claim 1, characterized in that: The protective diaphragm has a bowl-shaped structure, and a through hole that penetrates up and down and through which the eccentric connecting rod passes is arranged at its central end. The central inner edge of the protective diaphragm abuts against the air inlet channel. The upper end of the protective diaphragm abuts against the lower end face of the diaphragm assembly, so as to form a sealed cavity inside. The eccentric connecting rod moves upward, so that the air inlet channel moves away from the protective diaphragm, so that the internal gas enters the air inlet channel and is discharged outward.

3. The exhaust structure applicable to a multi-stage diaphragm pump according to claim 2, characterized in that: An exhaust insertion pipe and an exhaust valve are installed on the exhaust channel. One end of the exhaust insertion pipe is inserted into the exhaust channel, and the other end is for the exhaust valve to be installed and fixed and discharge gas outward.

4. The exhaust structure applicable to a multi-stage diaphragm pump according to claim 3, characterized in that: The number of the eccentric connecting rods is set to be plural. The lower ends of the plural eccentric connecting rods are sleeved on the drive shaft and drive the eccentric connecting rods to perform up-and-down reciprocating motion. The number of the diaphragm assemblies and the protective diaphragms is the same as that of the eccentric connecting rods.

5. The exhaust structure applicable to a multi-stage diaphragm pump according to claim 4, characterized in that: The upper ends of the plural eccentric connecting rods are respectively distributed in four different directions. The four eccentric connecting rods facing different directions are set as a group, and plural groups of eccentric connecting rods are arranged on the drive shaft.

6. The exhaust structure applicable to a multi-stage diaphragm pump according to claim 5, characterized in that: It further includes a pump body frame. A plurality of openings corresponding to the facing positions of the eccentric connecting rods are formed on the pump body frame. The diaphragm assembly at the upper end of the eccentric connecting rod is located at the lower inner end of the opening of the pump body frame, and the upper edge surface of the diaphragm assembly abuts against the lower inner end surface of the opening. An end cover is also arranged at the outer end of the pump body frame. The end cover is installed and fixed at the opening of the pump body frame, and a chamber is formed inside the pump body frame.

7. The exhaust structure applicable to a multi-stage diaphragm pump according to claim 6, characterized in that: The number of the end covers is set to be plural. The plural end covers are installed and fixed at the openings of the pump body frame and are spaced apart and distributed on the four faces of the pump body frame.

8. The exhaust structure applicable to a multi-stage diaphragm pump according to claim 7, wherein: A through hole that penetrates up and down is arranged on the end cover. A trachea is also connected to the outer end of the end cover. One end of the trachea is connected to the through hole of the end cover, and the other end extends to the tail end of the pump body frame for collection processing. The gas inside the pump body frame is discharged outward through the through hole by the trachea and is collected and processed uniformly.

9. The exhaust structure applicable to a multi-stage diaphragm pump according to claim 1, characterized in that: It further includes a drive motor. The drive motor is arranged at one side end of the drive shaft and is connected to it, and is used to control the drive shaft to rotate.

10. The exhaust structure applicable to a multi-stage diaphragm pump according to claim 1, characterized in that: The diaphragm assembly includes a support disc, an upper diaphragm and a shock-absorbing disc. The support disc is installed at the top end of the eccentric connecting rod. The shock-absorbing disc is installed and fixed at the center of the support disc. The upper diaphragm is arranged between the support disc and the shock-absorbing disc.

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