Diaphragm booster pump

Abstract

The utility model relates to the technical field of pumps, in particular to a diaphragm booster pump which comprises a motor, the motor is provided with a driving shaft extending towards a diaphragm assembly in the first direction, the driving shaft is connected with a transmission part of the diaphragm assembly, and the transmission part acts on a diaphragm. The insulation partition is located in the inner cavity and provided with a penetrating hole allowing the driving shaft to penetrate through, the insulation partition divides the inner cavity into a main cavity and a diaphragm chamber in the first direction, the motor is arranged in the main cavity, the diaphragm assembly is arranged in the diaphragm chamber, and the driving shaft extends to the diaphragm chamber from the main cavity; the sealing piece is arranged at the penetrating hole to seal the penetrating hole; an insulating shell is arranged on the outer surface of the portion, located in the diaphragm chamber, of the driving shaft, and / or an insulating part is arranged between the portion, located in the diaphragm chamber and the main cavity, of the driving shaft, so that the motor is insulated from the diaphragm chamber. The sealing member seals the main chamber and the diaphragm chamber, and the insulating member and / or the insulating member insulates the motor from the diaphragm chamber, so that the potential safety hazard of electric shock caused by water leakage is avoided.

Description

Technical Field

[0001] The present application relates to the field of pump technology, and in particular to a diaphragm booster pump. Background Art

[0002] Water purifiers are becoming increasingly popular. The diaphragm booster pumps used in these products are typically driven by a low-voltage motor, requiring an adapter to convert mains electricity into low-voltage DC power to power the diaphragm booster pump. The higher the flow rate of a water purifier, the greater its current demand, requiring a higher maximum current rating for the adapter, increasing costs.

[0003] At present, the main reason for using low-voltage motors is that the waterproof level of the diaphragm booster pump is low. If high-voltage motors are used, there will be safety hazards such as water leakage and electric shock. Among them, one situation is that the high-voltage motor itself has a short-circuit fault and discharges outward through the motor shaft and the metal motor shell. At this time, once the diaphragm leaks and the motor shaft comes into contact with water, the water flow will be charged, which can easily cause electric shock; another situation is that the high-voltage motor is flooded and causes short-circuit discharge, which will also cause the motor to discharge outward through the motor shaft and the metal motor shell. At this time, if the diaphragm leaks, the motor shaft will also come into contact with water, making the water flow charged, which can easily cause electric shock and pose a safety hazard.

[0004] Therefore, a diaphragm booster pump is urgently needed to solve the above problems. Utility Model Content

[0005] In order to solve the above technical problems, the present application provides a diaphragm booster pump.

[0006] The present application provides a diaphragm booster pump, comprising a pump head end cover, a diaphragm assembly, and a motor, wherein the motor has a drive shaft extending in a first direction toward the diaphragm assembly, the diaphragm assembly comprising a transmission portion and a diaphragm, a booster chamber being formed between the pump head end cover and the diaphragm, the drive shaft being connected to the transmission portion, and the transmission portion acting on the diaphragm, and further comprising:

[0007] an insulating housing having an inner cavity extending along a first direction;

[0008] an insulating partition, located in the inner cavity and having a through hole for the drive shaft to pass through, the insulating partition dividing the inner cavity along the first direction into a main chamber and a diaphragm chamber, the motor being disposed in the main chamber, the diaphragm assembly being disposed in the diaphragm chamber, and the drive shaft extending from the main chamber to the diaphragm chamber;

[0009] a sealing member, disposed at the penetration hole to seal the penetration hole;

[0010] An insulating shell is provided on the outer surface of the driving shaft located in the diaphragm chamber portion and / or an insulating member is provided between the driving shaft located in the diaphragm chamber portion and the main chamber portion, so as to insulate the motor from the diaphragm chamber.

[0011] In some embodiments, the drive shaft includes a main shaft and a slave shaft, the main shaft is located in the main chamber, the slave shaft is partially or completely located in the diaphragm chamber, and the main shaft and the slave shaft are connected through the insulating member to insulate the main shaft from the slave shaft.

[0012] In some embodiments, the slave shaft is passed through the penetration hole, the insulating member is located in the main chamber, and the sealing member is provided between the insulating partition and the slave shaft to seal the penetration hole.

[0013] In some embodiments, the slave shaft is passed through the through hole, the insulating member is located in the main chamber, and the sealing member includes a first sealing member and a second sealing member;

[0014] The first sealing member is provided between the insulating partition and the slave shaft to seal the through hole, and the second sealing member is provided between the insulating partition and the insulating member to assist in sealing.

[0015] In some embodiments, the insulating member is passed through the penetration hole, and the sealing member is disposed between the insulating partition and the insulating member to seal the penetration hole.

[0016] In some embodiments, the outer surface of the drive shaft located in the diaphragm chamber is covered with the insulating shell, and the insulating shell extends from the end of the drive shaft connected to the transmission part to the main chamber to insulate the drive shaft from the diaphragm chamber.

[0017] In some embodiments, the insulating shell passes through the through hole and the sealing member, so that the sealing member and the insulating partition separate the end of the insulating shell from the diaphragm chamber.

[0018] In some embodiments, the outer surface of the slave shaft is covered with the insulating shell, which extends from the end of the slave shaft connected to the transmission part to the insulating member. The insulating shell is connected to the insulating member so that the outer surface of the slave shaft is completely insulated.

[0019] In some embodiments, the transmission part includes an insulating eccentric wheel, which has a connecting hole in the middle, the drive shaft is matched and connected to the connecting hole, the insulating shell is formed by extending the insulating eccentric wheel, and the opening of the connecting hole facing the side of the diaphragm is insulated and sealed.

[0020] In some embodiments, the insulating partition forms a bearing chamber and at least one sealing chamber in sequence along the first direction, the sealing member is arranged in the sealing chamber, a first bearing is arranged in the bearing chamber, and the first bearing sleeve is fixed on the drive shaft or the insulating member.

[0021] The technical solution provided by the embodiments of the present application has the following advantages compared with the prior art:

[0022] The diaphragm booster pump adopts an insulating shell and an insulating partition to prevent the motor from discharging outwards when leakage occurs. The main chamber and the diaphragm chamber are isolated by providing a seal to prevent water entering the diaphragm chamber from entering the main chamber, and to prevent water from entering the main chamber and causing water to enter the motor and short circuit. At the same time, an insulating member is provided between the driving shaft located in the diaphragm chamber and the driving shaft located in the main chamber, or an insulating shell is provided on the outer surface of the driving shaft located in the diaphragm chamber, so that the motor and the diaphragm chamber are insulated. When leakage occurs in the motor, the insulating member or the insulating shell can prevent the current from being transferred to the diaphragm chamber and coming into contact with water, thereby avoiding the safety hazard of electric shock due to leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0025] Figure 1 A schematic structural diagram of the diaphragm booster pump provided in Example 1 of the present application;

[0026] Figure 2 for Figure 1 A schematic cross-sectional view of a diaphragm booster pump;

[0027] Figure 3 for Figure 1 Schematic diagram of the structure of the insulating shell of the diaphragm booster pump Figure 1 ;

[0028] Figure 4 for Figure 1 Schematic diagram of the structure of the insulating shell of the diaphragm booster pump Figure 2 ;

[0029] Figure 5 for Figure 1 A schematic structural diagram of the insulating component of the diaphragm booster pump;

[0030] Figure 6 for Figure 5 A schematic cross-sectional view of an insulating member in FIG.

[0031] Figure 7 for Figure 1 A schematic cross-sectional view of the insulating housing of the diaphragm booster pump;

[0032] Figure 8 for Figure 1 A schematic structural diagram of a baffle of a diaphragm booster pump;

[0033] Figure 9 A schematic cross-sectional view of a diaphragm booster pump provided in Example 2 of the present application;

[0034] Figure 10 A schematic cross-sectional view of a diaphragm booster pump provided in Example 3 of the present application;

[0035] Figure 11 A schematic cross-sectional view of a diaphragm booster pump provided in Example 4 of the present application;

[0036] Figure 12 for Figure 11 A partial enlarged schematic diagram;

[0037] Figure 13 A schematic cross-sectional view of a diaphragm booster pump provided in Example 5 of the present application;

[0038] Figure 14 This is a schematic diagram of an insulating shell formed by an insulating eccentric wheel in a fourth embodiment of the present application;

[0039] Figure 15 This is a schematic diagram of the insulating shell formed by the insulating eccentric wheel in Example 6 of the present application.

[0040] Among them, 1. Insulating shell; 111. First sealing groove; 112. Threaded hole; 113. Second sealing groove; 2. Insulating partition; 21. Through hole; 3. Motor; 31. Drive shaft; 311. Main shaft; 312. Slave shaft; 32. Rotor; 33. Stator; 331. Inner shell; 332. Magnetic tile; 4. Diaphragm assembly; 41. Insulating eccentric wheel; 42. Transmission bearing; 5. First sealing member; 6. Insulating member; 61. Plug hole; 7. Insulating shell; 8. First bearing; 9. Pump head end cover; 10. Back cover; 11. Second bearing; 12. Second sealing member; 13. Baffle; 14. Insulating membrane;

[0041] 100, diaphragm chamber; 200, main chamber; 201, first sealed chamber; 202, second sealed chamber; 203, bearing chamber; 204, baffle chamber; 205, rotor chamber; 300, boost chamber. DETAILED DESCRIPTION

[0042] In order to more clearly understand the above-mentioned objectives, features and advantages of the present application, the scheme of the present application will be further described below. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other.

[0043] In the following description, many specific details are set forth to facilitate a full understanding of the present application, but the present application can also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present application, not all of the embodiments.

[0044] Example 1

[0045] like Figures 1 to 8 As shown, this embodiment provides a diaphragm booster pump, which includes a pump head end cover 9, a diaphragm assembly 4 and a motor 3. The motor 3 has a drive shaft 31 extending toward the diaphragm assembly 4 along a first direction. The diaphragm assembly 4 includes a transmission part and a diaphragm. A boosting chamber 300 is formed between the pump head end cover 9 and the diaphragm. The drive shaft 31 is connected to the transmission part, and the transmission part acts on the diaphragm.

[0046] Furthermore, the above-mentioned diaphragm booster pump also includes an insulating shell 1, an insulating partition 2 and a sealing member. Among them, the insulating shell 1 has an inner cavity extending along a first direction. The insulating partition 2 is located in the inner cavity and has a through hole 21 for the drive shaft 31 to pass through. The insulating partition 2 divides the inner cavity along the first direction to form a main chamber 200 and a diaphragm chamber 100. The motor 3 is arranged in the main chamber 200, the diaphragm assembly 4 is arranged in the diaphragm chamber 100, and the drive shaft 31 extends from the main chamber 200 to the diaphragm chamber 100. The sealing member is arranged at the through hole 21 to seal the through hole 21. An insulating member 6 is provided between the portion of the drive shaft 31 located in the diaphragm chamber 100 and the portion located in the main chamber 200 to insulate the motor 3 from the diaphragm chamber 100.

[0047] It can be understood that the diaphragm booster pump can prevent the motor 3 from discharging outward when leakage occurs by adopting an insulating shell 1 and an insulating partition 2, and by setting a seal, the main chamber 200 and the diaphragm chamber 100 are isolated, so as to prevent water entering the diaphragm chamber 100 from entering the main chamber 200, and to prevent water from entering the main chamber 200 and causing water to enter the motor 3 and short circuit. At the same time, an insulating member 6 is set between the part of the drive shaft 31 located in the diaphragm chamber 100 and the part of the drive shaft 31 located in the main chamber 200 to insulate the two parts of the drive shaft 31. When leakage occurs in the motor 3, the insulating member 6 can prevent the current from being transmitted to the diaphragm chamber 100 and coming into contact with water, thereby avoiding the safety hazard of water leakage and electric shock.

[0048] In addition, the design of the diaphragm booster pump allows the motor 3 to adopt a high-voltage motor 3, so that the electrical appliance using the diaphragm booster pump does not need to be equipped with an adapter, reducing the cost of the electrical appliance and improving the competitiveness of the electrical appliance.

[0049] Reference Figures 2 to 4 The above-mentioned diaphragm booster pump further includes a rear cover 10. The pump head end cover 9 and the rear cover 10 are respectively arranged at both ends of the insulating shell 1 in the first direction to form a pump shell.

[0050] Furthermore, the pump head end cover 9 and the insulating housing 1 are sealed. Figure 2 and Figure 3 The insulating housing 1 and the pump head end cover 9 are connected by screws. A through hole for the screws is provided on the insulating housing 1, and a threaded hole 112 is provided on the insulating housing 1 to cooperate with the screws. The insulating housing 1 and the pump head end cover 9 are detachably connected by the screws, which facilitates assembly and disassembly of the insulating housing 1 and the pump head end cover 9.

[0051] For example, referring to Figure 3 Six threaded holes 112 are provided on the end face of the insulating shell 1 along its circumference. Correspondingly, six through holes are provided on the pump head end cover 9. The pump head end cover 9 and the insulating shell 1 are connected and fixed by six screws.

[0052] It should be noted that the pump head end cover 9 is also an insulating structure, that is, the pump head end cover 9 is made of an insulating material to provide insulation. The insulating material can be selected according to actual needs and is not specifically limited here. For example, the pump head end cover 9 and the insulating housing 1 are made of the same insulating material.

[0053] Furthermore, a first sealing groove 111 for accommodating a sealing ring is provided on the end surface of the insulating housing 1. A sealing ring is provided between the end surface of the insulating housing 1 and the pump head end cover 9, thereby further achieving sealing between the insulating housing 1 and the pump head end cover 9.

[0054] Furthermore, the back cover 10 and the insulating housing 1 are sealed. Figure 2 and Figure 4 A second sealing groove 113 for accommodating a sealing ring is defined on the end face of the insulating housing 1. A sealing ring is disposed between the end face of the insulating housing 1 and the rear cover 10. The sealing ring is received in the second sealing groove 113, thereby achieving a seal between the insulating housing 1 and the rear cover 10. The rear cover 10 and the insulating housing 1 may be connected by laser welding, far-infrared welding, or other methods, which are not specifically limited herein.

[0055] It should be noted that the rear cover 10 is also an insulating structure, that is, the rear cover 10 is made of an insulating material to provide insulation. The insulating material can be selected according to actual needs and is not specifically limited here. For example, the rear cover 10 and the insulating housing 1 are made of the same insulating material.

[0056] In addition, the pump housing can be coated with an insulating film to further improve insulation performance. That is, after the insulating outer shell 1, pump head end cover 9 and rear cover 10 are assembled to form the pump housing, a layer of insulating film is coated on the outside of the pump housing to further improve the insulation performance of the diaphragm booster pump and reduce the risk of leakage.

[0057] Reference Figures 2 to 4 The above-mentioned insulating partition 2 and insulating shell 1 are integrally formed, so that there is no seam between the insulating partition 2 and the insulating shell 1, thereby preventing water from entering the main chamber 200 through the seam between the insulating partition 2 and the insulating shell 1 when water leaks in the diaphragm chamber 100, thereby improving the sealing performance.

[0058] It is understandable that if the insulating partition 2 and the insulating shell 7 are set separately, the insulating partition 2 needs to be installed inside the insulating shell 7 and sealed by means of sealant, sealing ring, etc., but there is a risk of sealing failure. In this way, when the seal fails, if the diaphragm chamber 100 leaks, water enters the main chamber 200 through the joint between the insulating partition 2 and the insulating shell 1, causing the motor 3 to short-circuit and leak.

[0059] Preferably, the insulating partition 2 and the insulating shell 1 are integrally injection-molded.

[0060] Reference Figure 2 The motor 3 further includes a rotor portion 32 and a stator portion 33. The drive shaft 31 is disposed through the rotor portion 32, and the drive shaft 31 rotates synchronously with the rotor portion 32. The stator portion 33 surrounds the rotor portion 32 and is disposed on the insulating housing 1.

[0061] Specifically, the stator portion 33 comprises an inner shell 331 and magnetic tiles 332, both of which surround the rotor portion 32. The inner shell 331 is a metal component. During injection molding of the insulating outer shell 1, the inner shell 331 is partially embedded within the insulating outer shell 1. This insulates the inner shell 331 and prevents electrical leakage. The magnetic tiles 332 are located inside the inner shell 331, securing the tiles 332 and creating a magnetic circuit for them, reducing magnetic flux leakage and thus preventing any impact on electrical performance.

[0062] It should be noted that the rotor portion 32 is located in the rotor chamber 205 , and the rotor chamber 205 is a part of the main chamber 200 .

[0063] Reference Figure 2 The above-mentioned driving shaft 31 includes a main shaft 311 and a slave shaft 312. The main shaft 311 is located in the main chamber 200, and the slave shaft 312 is partially or completely located in the diaphragm chamber 100. The main shaft 311 and the slave shaft 312 are connected through an insulating member 6 to insulate the main shaft 311 from the slave shaft 312.

[0064] That is, the drive shaft 31 includes a main shaft 311 and a slave shaft 312, which are separately provided. This facilitates the provision of an insulating member 6 between the main shaft 311 and the slave shaft 312, thereby achieving insulation between the main shaft 311 and the slave shaft 312. Furthermore, the slave shaft 312 can be entirely located in the diaphragm chamber 100, or a portion of the slave shaft 312 can be located in the diaphragm chamber 100 and the other portion can be located in the main chamber 200.

[0065] Furthermore, there are two ways to set the slave shaft 312. The first is that the slave shaft 312 is completely located in the diaphragm chamber 100. The second is that part of the slave shaft 312 is located in the diaphragm chamber 100 and the other part is located in the main chamber 200. In this case, the insulating member 6 is located in the main chamber 200.

[0066] In the first case, the slave shaft 312 is completely located within the diaphragm chamber 100. The insulating member 6 is disposed through the through-hole 21, and the sealing member is disposed between the insulating partition 2 and the insulating member 6 to seal the through-hole 21. It is understood that the sealing member is sleeved on the insulating member 6 and can be disposed within the through-hole 21 or within the main chamber 200.

[0067] When the seal is located in the main chamber 200, the inner side of the seal contacts the outer peripheral surface of the insulating member 6 to form a seal, and the outer side of the seal contacts the inner side of the insulating partition 2 to form a seal. At this time, the insulating partition 2 can be a cylindrical structure, and the inner cavity of the cylindrical structure constitutes a part of the main chamber 200.

[0068] When the sealing member is located in the penetration hole 21 , the inner side surface of the sealing member contacts the outer peripheral surface of the insulating member 6 to form a seal, and the outer side surface of the sealing member contacts the wall surface of the penetration hole 21 to form a seal.

[0069] It should be noted that at least one sealing member is provided. When multiple sealing members are provided, some sealing members may be provided in the through hole 21 and others may be provided in the main chamber 200 .

[0070] In the second case, the slave shaft 312 is inserted into the through-hole 21, the insulating member 6 is located in the main chamber 200, and the sealing member is disposed between the insulating partition 2 and the slave shaft 312 to seal the through-hole 21. It is understood that the sealing member is sleeved on the slave shaft 312 and can be disposed in the through-hole 21 or in the main chamber 200.

[0071] When the seal is located within the main chamber 200, refer to Figure 2 The inner side of the seal contacts the outer circumference of the slave shaft 312 to form a seal, and the outer side of the seal contacts the inner side of the insulating partition 2 to form a seal. In this case, the insulating partition 2 can be a cylindrical structure, and the inner cavity of the cylindrical structure constitutes a part of the main chamber 200. Among them, there is one seal provided, which can be defined as the first seal 5.

[0072] When the seal is located in the penetration hole 21 , the inner side of the seal contacts the outer peripheral surface of the slave shaft 312 to form a seal, and the outer side of the seal contacts the wall surface of the penetration hole 21 to form a seal.

[0073] It should be noted that the above-mentioned sealing member may be provided in plurality. When the sealing member is provided in plurality, some of the sealing members may be provided in the through hole 21 , and the other sealing members may be provided in the main chamber 200 .

[0074] Exemplarily, the above-mentioned seal can be selected as an oil seal, and the outer wall of the oil seal is assembled with the inner side surface of the insulating partition 2 or the wall surface of the penetration hole 21 by interference fit. The shaft 312 is penetrated into the inner hole of the oil seal by interference fit, so that the penetration hole 21 can be sealed and a waterproof effect can be achieved.

[0075] Reference Figure 5 and Figure 6 The insulating member 6 has insertion holes 61 at both ends of its axial direction. The main shaft 311 and the slave shaft 312 are inserted into the two insertion holes 61 to connect with the insulating member 6. Both the main shaft 311 and the slave shaft 312 have an interference fit with the corresponding insertion holes 61 to ensure connection strength. Furthermore, to ensure good insulation, the distance D between the bottom walls of the two insertion holes 61 is greater than 1.5 mm.

[0076] For example, referring to Figure 5 and Figure 6 The radial boundary of the above-mentioned plug-in hole 61 forms a D-shape, a regular polygon, etc., that is, a part of the wall surface of the plug-in hole 61 is set to a plane, so that the main shaft 311 and the slave shaft 312 are both provided with a plane that fits with the plane of the corresponding plug-in hole 61. In this way, an anti-rotation design can be performed between the main shaft 311 and the insulating member 6, and between the slave shaft 312 and the insulating member 6, so that the main shaft 311, the insulating member 6 and the slave shaft 312 maintain synchronous rotation, avoiding relative rotation between the main shaft 311 and the insulating member 6 or the slave shaft 312 and the insulating member 6, which affects the power transmission.

[0077] It should be noted that the depth L of the two plug holes 61 is set to be the same, so as to avoid uneven force on both sides of the driving shaft 31 in the axial direction of the insulating member 6 and cause large deformation, thereby improving the stability of the transmission between the main shaft 311 and the slave shaft 312.

[0078] Reference Figure 2 and Figure 7The insulating partition 2 forms a bearing chamber 203 and at least one sealing chamber in sequence along a first direction. The sealing member is disposed in the sealing chamber. The first bearing 8 is disposed in the bearing chamber 203. The insulating member 6 is disposed through the bearing chamber 203 or through the bearing chamber 203 and the at least one sealing chamber.

[0079] The first bearing 8 can be fixedly mounted on the drive shaft 31 or fixedly mounted on the insulating member 6. Figure 2 The first bearing 8 is sleeved on the insulating member 6. At this time, the first bearing 8 can support the insulating member 6, thereby reducing the deformation and swing of the insulating member 6 when it is rotated under force, thereby reducing the vibration and noise of the diaphragm booster pump.

[0080] As can be understood, the configuration of the insulating partition 2 with the bearing chamber 203 and the sealing chamber provides space for the installation of the first bearing 8 and the seal, facilitating the installation and positioning of the seal and the first bearing 8. It should be noted that the sealing chamber is closer to the perforation 21 relative to the bearing chamber 203, thereby preventing water leakage from the diaphragm chamber 100 from entering the bearing chamber 203 through the perforation 21 and affecting the first bearing 8.

[0081] It should be noted that the length of the above-mentioned insulating part 6 in the axial direction of the drive shaft 31 is set to be more than 1.5 times the thickness of the first bearing 8 in the axial direction of the drive shaft 31. This can further ensure the uniformity of the force on the insulating part 6 and avoid deformation of the insulating part 6 during rotation.

[0082] Further, refer to Figure 2 The diaphragm booster pump further includes a second bearing 11 disposed on the rear housing. The second bearing 11 is sleeved on the main shaft 311 to support the main shaft 311 .

[0083] Furthermore, the number of the sealed chambers can be set according to actual needs, and at least one sealing element can be placed in each sealed chamber. Figure 2 and Figure 7 There are two sealed chambers, which are defined as a first sealed chamber 201 and a second sealed chamber 202. The first sealed chamber 201 is closer to the through hole 21 than the second sealed chamber 202. At this time, the above-mentioned sealing member is only provided in the first sealed chamber 201. Of course, the number of sealing members can also be increased according to actual needs.

[0084] Furthermore, the inner diameter of the bearing chamber 203 is larger than the inner diameter of the sealing chamber, so that the insulating partition 2 has a stepped structure.

[0085] It can be understood that the inner diameter of the bearing chamber 203 is set to be larger than the inner diameter of the sealing chamber, so that the bearing chamber 203 and the sealing chamber form a step surface, through which the first bearing 8 can be limited in the axial direction of the drive shaft 31, which is not only conducive to improving the stability of the first bearing 8 during rotation, but also facilitates the installation of the first bearing 8 in place.

[0086] Furthermore, the inner diameter of the sealing chamber is larger than that of the through-hole 21, thereby forming a stepped surface that limits the position of the seal in the axial direction of the drive shaft 31, facilitating the installation of the seal. It should be noted that when two or more sealing chambers are provided, the inner diameters of two adjacent sealing chambers are different, and the inner diameter of the sealing chamber closer to the bearing chamber 203 is larger than that of the other sealing chambers. In this way, the stepped surface can limit the position of each seal in the axial direction of the drive shaft 31.

[0087] Further, refer to Figure 2 、 Figure 7 and Figure 8 The insulating barrier 2 further includes a baffle chamber 204, with the bearing chamber 203 located between the baffle chamber 204 and the sealing chamber. The baffle chamber 204 accommodates the baffle 13, which is connected to the insulating barrier 2 and presses against the first bearing 8. This applies a certain preload force to the first bearing 8 in the axial direction, reducing the noise generated by the rotation of the first bearing 8 and increasing its service life.

[0088] The contact surface of the baffle 13 with the first bearing 8 is a concave surface, ensuring that the baffle 13 contacts the outer ring of the first bearing 8 and preventing the baffle 13 from interfering with the rotation of the inner ring of the first bearing 8 .

[0089] It should be noted that, referring to Figure 7 The bearing chamber 203 , at least one sealing chamber, the baffle chamber 204 and the rotor chamber 205 constitute the main chamber 200 .

[0090] Example 2

[0091] The structure of the diaphragm booster pump provided in this embodiment is substantially the same as that of the diaphragm booster pump in the first embodiment, wherein the insulating member 6 is located in the main chamber 200, the slave shaft 312 is passed through the through hole 21, the above-mentioned sealing member is located in the main chamber 200, and the insulating partition 2 is sequentially formed with a bearing chamber 203 and at least one sealing chamber along the first direction. The difference is that: in a specific implementation, referring to Figure 9 The sealing member includes a first sealing member 5 and a second sealing member 12. The first sealing member 5 is provided between the insulating partition 2 and the slave shaft 312 to seal the through hole 21, and the second sealing member 12 is provided between the insulating partition 2 and the insulating member 6 to assist in sealing.

[0092] Understandably, compared with the first embodiment, two seals are provided in this embodiment. The first seal 5 is used to seal the penetration hole 21 , and the second seal 12 is used to assist in sealing and enhance the sealing effect.

[0093] Specifically, the insulating partition 2 has two sealed chambers, which are defined as a first sealed chamber 201 and a second sealed chamber 202 . The first sealed chamber 201 is closer to the through hole 21 than the second sealed chamber 202 .

[0094] The first seal 5 is located in the first sealed chamber 201 and sleeved on the slave shaft 312. The second seal 12 is located in the second sealed chamber 202 and sleeved on the insulating member 6. The second seal 12 is disposed between the insulating partition 2 and the insulating member 6. The outer surface of the second seal 12 contacts the wall of the second sealed chamber 202 to form a seal, and the inner surface of the second seal 12 contacts the outer surface of the insulating member 6 to form a seal.

[0095] Alternatively, in another specific implementation, the second seal 12 may be further disposed between the slave shaft 312 and the insulating barrier 2. That is, both the first seal 5 and the second seal 12 are sleeved on the slave shaft 312, with the first seal 5 being closer to the through-hole 21 than the second seal 12. The first seal 5 seals the through-hole 21, while the second seal 12 provides auxiliary sealing.

[0096] It should be noted that the second sealing member 12 may also be an oil seal.

[0097] Example 3

[0098] The structure of the diaphragm booster pump provided in this embodiment is basically the same as that of the diaphragm booster pump in the first embodiment. In particular, the insulating member 6 is located in the main chamber 200, and the slave shaft 312 is penetrated through the penetration hole 21. The above-mentioned sealing member is located in the main chamber 200, and the insulating partition 2 is sequentially formed with a bearing chamber 203 and at least one sealing chamber along the first direction. The difference is that: in a specific implementation, referring to Figure 10 The sealing member can be defined as a first sealing member 5 , which is disposed between the insulating member 6 and the insulating partition 2 to seal the through hole 21 .

[0099] Understandably, compared with the first embodiment, the first sealing member 5 of this embodiment is sleeved on the insulating member 6, which can shorten the length of the shaft 312 or reduce the number of sealing chambers in the insulating partition 2, making the structure more compact.

[0100] Specifically, refer to Figure 10The insulating partition 2 has a sealed chamber, the above-mentioned insulating member 6 is arranged through the sealed chamber and the bearing chamber 203, the first sealing member 5 is located in the sealed chamber, the outer side surface of the first sealing member 5 contacts the wall surface of the sealed chamber to form a seal, and the inner side surface of the first sealing member 5 contacts the outer surface of the insulating member 6 to form a seal.

[0101] Example 4

[0102] like Figure 11 and Figure 12 As shown, the structure of the diaphragm booster pump provided in this embodiment is basically the same as that of the diaphragm booster pump in Example 1, except that the drive shaft 31 is a whole, rather than being divided into a main shaft 311 and a slave shaft 312, and the diaphragm booster pump in this embodiment does not include an insulating member 6, and the insulation between the drive shaft 31 and the diaphragm chamber 100 is not achieved by the insulating member 6. Instead, an insulating shell 7 is provided on the outer surface of the portion of the drive shaft 31 located in the diaphragm chamber 100 to insulate the motor 3 from the diaphragm chamber 100.

[0103] It can be understood that the diaphragm booster pump of this embodiment achieves insulation between the drive shaft 31 and the diaphragm chamber 100 through the insulating shell 1, and can prevent the current from being transmitted to the diaphragm chamber 100 and coming into contact with water through the insulating shell 7 when leakage occurs in the motor 3, thereby reducing the leakage risk of the diaphragm booster pump and avoiding the safety hazard of electric shock caused by leakage.

[0104] Specifically, refer to Figure 11 and Figure 12 The outer surface of the driving shaft 31 located in the diaphragm chamber 100 is covered with an insulating shell 7, and the insulating shell 7 extends from one end of the driving shaft 31 connected to the transmission part to the main chamber 200 to insulate the driving shaft 31 from the diaphragm chamber 100.

[0105] It can be understood that the above-mentioned insulating shell 7 covers one end of the drive shaft 31 connected to the transmission part and extends into the main chamber 200, so as to ensure that the part of the drive shaft 31 located in the diaphragm chamber 100 is completely covered, and the part of the drive shaft 31 located in the main chamber 200 is also covered, thereby avoiding the transmission to the diaphragm chamber 100 and contact with water when the motor 3 leaks electricity.

[0106] Furthermore, the insulating shell 7 is passed through the penetration hole 21 and the seal, so that the seal and the insulating partition 2 separate the end of the insulating shell 7 from the diaphragm chamber 100 .

[0107] As can be understood, the seal is sleeved on the insulating housing 7, which not only ensures insulation between the drive shaft 31 and the diaphragm chamber 100, but also reduces the length of the insulating housing 7, thereby reducing costs. At this time, the outer side of the seal contacts the wall of the sealing chamber to form a seal, and the inner side of the seal contacts the outer surface of the insulating housing 7 to form a seal.

[0108] For example, in a specific implementation, referring to Figure 12 The above-mentioned sealing member is defined as a first sealing member 5. The first sealing member 5 is sleeved on the insulating shell 7. The first sealing member 5 plays the role of sealing the penetration hole 21 to prevent water from entering the main chamber 200 through the penetration hole 21 when water leaks in the diaphragm chamber 100.

[0109] In some embodiments, the transmission part includes an insulating eccentric wheel 41, a transmission bearing 42 and a balance wheel. The insulating eccentric wheel 41 has a connecting hole in the middle. The driving shaft 31 is connected to the insulating eccentric wheel 41 through the connecting hole. The balance wheel is driven by the insulating eccentric wheel 41, and the balance wheel acts on the diaphragm. The insulating eccentric wheel 41 is usually made of plastic and therefore has insulating properties.

[0110] Therefore, in this embodiment, the insulating shell 7 can be a separate component, that is, the outer surface of the driving shaft 31 located in the diaphragm chamber 100 is covered with an insulating shell, and then connected to the insulating eccentric wheel 41 through the connecting hole. Figure 14 In this embodiment, the insulating shell 7 can also be directly formed by the insulating eccentric wheel 41. Specifically, the portion of the drive shaft 31 located in the diaphragm chamber 100 is directly connected to the connecting hole of the insulating eccentric wheel 41, and the insulating eccentric wheel 41 extends from the end of the drive shaft 31 connected to the transmission part toward the motor 3 until it extends into the main chamber 200. In this way, the insulating eccentric wheel 41 forms an insulating shell 7 that covers the portion of the drive shaft 31 located in the diaphragm chamber 100, and the opening of the connecting hole facing the diaphragm side is insulated and sealed, and the end face of the drive shaft 31 facing the diaphragm side is insulated and covered.

[0111] Example 5

[0112] The structure of the diaphragm booster pump provided in this embodiment is basically different from that of the diaphragm booster pump in the fourth embodiment. Figure 13 The difference is that the diaphragm booster pump of this embodiment is coated with an insulating film 14 on the outside of the pump housing to further improve insulation performance. In other words, after the insulating outer shell 1, pump head end cover 9, and rear cover 10 are assembled into the pump housing, a layer of insulating film 14 is coated on the outside of the pump housing to further improve the insulation performance of the diaphragm booster pump and reduce the risk of leakage.

[0113] Example 6

[0114] The diaphragm booster pump provided in this embodiment has a substantially identical structure to that of the diaphragm booster pump in the first embodiment, with the difference being that an insulating housing is further provided on the outer surface of the portion of the drive shaft located in the diaphragm chamber. This means that the insulating housing and the insulating member simultaneously insulate the drive shaft from the diaphragm chamber.

[0115] Specifically, the outer surface of the portion of the drive shaft located in the diaphragm chamber is covered with an insulating shell, and the insulating shell extends from one end of the drive shaft connected to the transmission part to the main chamber to insulate the drive shaft from the diaphragm chamber. In this case, the number of seals can be set to one or more. When the number of seals is set to one, the seal is sleeved on the insulating shell; when the number of seals is set to multiple, a part of the seals can be sleeved on the insulating shell, and the other part of the seals can be directly sleeved on the portion of the slave shaft located in the diaphragm chamber and not covered by the insulating shell, or sleeved on the insulating member. Alternatively, a part of the seals can be sleeved on the insulating shell, a part of the seals can be directly sleeved on the portion of the slave shaft located in the diaphragm chamber and not covered by the insulating shell, and the remaining part of the seals can be sleeved on the insulating member.

[0116] One implementation of this embodiment is that the outer surface of the slave shaft 312 is covered with an insulating shell 7, the insulating shell 7 extends from the end of the slave shaft 312 connected to the transmission part to the insulating part 6, and the insulating shell 7 is connected to the insulating part 6, so that the outer surface of the slave shaft 312 is completely insulated and covered, wherein there is no space between the insulating shell 7 and the insulating part 6 so that the slave shaft is exposed, so that the slave shaft 312 is completely covered, and the insulating shell 7 and the insulating part 6 can be an integral injection molding structure.

[0117] In some embodiments, the transmission part includes an insulating eccentric wheel 41, a transmission bearing 42 and a balance wheel. The insulating eccentric wheel 41 has a connecting hole in the middle. The driving shaft 31 is connected to the insulating eccentric wheel 41 through the connecting hole. The balance wheel is driven by the insulating eccentric wheel 41, and the balance wheel acts on the diaphragm. The insulating eccentric wheel 41 is usually made of plastic and therefore has insulating properties.

[0118] Therefore, in this embodiment, the insulating shell 7 can be a separate component, that is, after the outer surface of the shaft 312 is covered with the insulating shell 7, the insulating eccentric wheel 41 is connected through the connecting hole. Figure 15 In this embodiment, the insulating shell 7 can also be directly formed by the insulating eccentric wheel 41. Specifically, the slave shaft 312 is directly connected to the connecting hole of the insulating eccentric wheel 41, and then the insulating eccentric wheel 41 extends from the end of the slave shaft 312 connected to the transmission part toward the motor 3 until the insulating eccentric wheel 41 is connected to the insulating member 6. In this way, the insulating eccentric wheel 41 forms an insulating shell 7 covering the slave shaft 312, and the opening of the connecting hole facing the diaphragm side is insulated and sealed, and the end face of the slave shaft 312 facing the diaphragm side is insulated and covered.

[0119] 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 entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0120] The foregoing description is intended only to provide specific embodiments of the present application, which will enable those skilled in the art to understand and implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments described herein, but is intended to be construed in the broadest manner consistent with the principles and novel features disclosed herein.

Claims

1. A diaphragm booster pump, comprising a pump head end cover (9), a diaphragm assembly (4) and a motor (3), wherein the motor (3) has a drive shaft (31) extending along a first direction toward the diaphragm assembly (4), the diaphragm assembly (4) comprises a transmission part and a diaphragm, a boosting chamber (300) is formed between the pump head end cover (9) and the diaphragm, the drive shaft (31) is connected to the transmission part, and the transmission part acts on the diaphragm, characterized in that Also includes: An insulating housing (1) having an inner cavity extending along a first direction; an insulating partition (2), located in the inner cavity and having a through hole (21) for the drive shaft (31) to pass through, the insulating partition (2) dividing the inner cavity along the first direction into a main chamber (200) and a diaphragm chamber (100), the motor (3) being arranged in the main chamber (200), the diaphragm assembly (4) being arranged in the diaphragm chamber (100), and the drive shaft (31) extending from the main chamber (200) to the diaphragm chamber (100); A sealing member is provided at the penetration hole (21) to seal the penetration hole (21); An insulating shell (7) is provided on the outer surface of the portion of the drive shaft (31) located in the diaphragm chamber (100) and / or an insulating member (6) is provided between the portion of the drive shaft (31) located in the diaphragm chamber (100) and the portion located in the main chamber (200), so as to insulate the motor (3) from the diaphragm chamber (100).

2. The diaphragm booster pump according to claim 1, characterized in that: The driving shaft (31) includes a main shaft (311) and a slave shaft (312), wherein the main shaft (311) is located in the main chamber (200), and the slave shaft (312) is partially or completely located in the diaphragm chamber (100), and the main shaft (311) and the slave shaft (312) are connected through the insulating member (6) to insulate the main shaft (311) from the slave shaft (312).

3. The diaphragm booster pump according to claim 2, characterized in that: The slave shaft (312) is inserted into the insertion hole (21), the insulating member (6) is located in the main chamber (200), and the sealing member is provided between the insulating partition (2) and the slave shaft (312) to seal the insertion hole (21).

4. The diaphragm booster pump according to claim 2, characterized in that: The slave shaft (312) is inserted into the insertion hole (21), the insulating member (6) is located in the main chamber (200), and the sealing member includes a first sealing member (5) and a second sealing member (12); The first sealing member (5) is provided between the insulating partition (2) and the slave shaft (312) to seal the penetration hole (21), and the second sealing member (12) is provided between the insulating partition (2) and the insulating member (6) to assist in sealing.

5. The diaphragm booster pump according to claim 2, characterized in that: The insulating member (6) is inserted into the insertion hole (21), and the sealing member is provided between the insulating partition (2) and the insulating member (6) to seal the insertion hole (21).

6. The diaphragm booster pump according to claim 1, characterized in that: The outer surface of the driving shaft (31) located in the diaphragm chamber (100) is covered with the insulating shell (7), and the insulating shell (7) extends from the end of the driving shaft (31) connected to the transmission part to the main chamber (200) to insulate the driving shaft (31) from the diaphragm chamber (100).

7. The diaphragm booster pump according to claim 6, characterized in that: The insulating shell (7) passes through the penetration hole (21) and the sealing member, so that the sealing member and the insulating partition (2) separate the end of the insulating shell (7) from the diaphragm chamber (100).

8. The diaphragm booster pump according to claim 2, characterized in that: The outer surface of the slave shaft (312) is covered with the insulating shell (7), and the insulating shell (7) extends from one end of the slave shaft (312) connected to the transmission part to the insulating member (6). The insulating shell (7) is connected to the insulating member (6) so that the outer surface of the slave shaft (312) is completely covered with insulation.

9. The diaphragm booster pump according to any one of claims 6 to 8, characterized in that: The transmission part includes an insulating eccentric wheel (41), a connecting hole is provided in the middle of the insulating eccentric wheel (41), the driving shaft (31) is matched and connected with the connecting hole, the insulating shell (7) is formed by extending the insulating eccentric wheel (41), and the opening of the connecting hole toward the side of the diaphragm is insulated and sealed.

10. The diaphragm booster pump according to claim 1, characterized in that: The insulating partition (2) sequentially forms a bearing chamber (203) and at least one sealing chamber along the first direction, the sealing member is arranged in the sealing chamber, a first bearing (8) is arranged in the bearing chamber (203), and the first bearing (8) is sleeved and fixed on the drive shaft (31) or the insulating member (6).

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