Pump body assembly and pump

Abstract

The utility model belongs to the technical field of pumps, and provides a pump body assembly and a pump, the pump body assembly comprises a pump body, an outer spigot is arranged on the pump body, and the outer spigot is connected with an inner spigot of a machine base through a screw; at least two groups of arc-shaped gaskets are arranged on the upper back part of the pump body along the circumferential direction, and the gap between two adjacent groups of gaskets is not more than 2mm; a gap between every two adjacent groups of gaskets is formed in the position outside the longitudinal section of the water outlet in the pump body, and the central axis of the water outlet and the central axis of the pump body are both located in the longitudinal section; the range of the width dimension D2 of the gasket is 1-5 mm smaller than the size range of the difference value of the inner diameter and the outer diameter of the outer spigot; after the pump body and the machine base are installed, the sum t of the thicknesses of the gasket, the outer spigot and the inner spigot is larger than or equal to P / s, P is the maximum bearing pressure of the joint of the pump body and the machine base and is smaller than or equal to 3 Mbar, and the strength s of the gasket is not lower than 205 Mbar. The gasket, the outer spigot and the machine base are fixedly connected through screws.

Description

Technical Field

[0001] The utility model belongs to the technical field of pumps, and in particular relates to a pump body component and a pump. Background Art

[0002] Existing stainless steel pump bodies are mostly stamped and typically range in thickness from 1.5mm to 3mm. When the pump body is connected to the motor and high pressure builds up inside, the pressure-bearing connection deforms, causing leakage. Existing pump bodies are unable to meet the higher pressure requirements. Increasing the pump body's structural strength by thickening it would significantly increase production costs. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a stainless steel pump body and a pump to solve the problem of deformation of the high-pressure pump body and reduce production costs.

[0004] To achieve this purpose, the present invention adopts the following technical solutions:

[0005] A pump assembly comprising:

[0006] The pump body is provided with an outer stop, which is connected to the inner stop of the base by screws;

[0007] Gaskets: at least two groups of arc-shaped gaskets are circumferentially arranged on the upper back of the pump body, and the gap between two adjacent groups of gaskets does not exceed 2 mm; the gap between two adjacent groups of gaskets is arranged outside the longitudinal section of the water outlet on the pump body, and the central axis of the water outlet and the central axis of the pump body are both located within the longitudinal section;

[0008] The width dimension D2 of the gasket is smaller than the difference between the inner and outer diameters of the outer stop, which is in the range of 1-5 mm;

[0009] After the pump body and the base are installed, the sum of the thicknesses of the gasket, the outer stopper, and the inner stopper t≥P / s, where P is the maximum bearing pressure at the connection between the pump body and the base, P≤3Mbar, and the strength s of the gasket is not less than 205Mbar;

[0010] The gasket, the outer stop and the machine base are fixedly connected by the screws.

[0011] Preferably, the gap between two adjacent groups of gaskets is 0.5 mm, 1 mm or 2 mm.

[0012] Preferably, the diameter D1 of the mating position of the screw installed on the outer stop is in the range of 100 mm to 300 mm.

[0013] Preferably, the number of the screws ranges from 6 to 8 groups.

[0014] Preferably, the outer stopper includes a flange body and a stopper portion connected to an edge of the flange body, and the stopper portion extends in an axial direction of the flange body in a direction away from the pump body;

[0015] The inner stop is inserted into the stop portion.

[0016] Preferably, the thickness of the gasket ranges from 1.5 mm to 3 mm.

[0017] Preferably, the gasket is made of stainless steel.

[0018] Preferably, a screw hole is provided on the outer stop, and a threaded hole is provided on the inner stop, and the screw is passed through the screw hole and threadedly connected to the threaded hole.

[0019] A pump comprises the pump body assembly.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] By setting a gasket on the back of the pump body, fastening the gasket to the pump body and the base with screws, and increasing the strength of the external stop, the pressure-bearing capacity of the pump body after connection with the base is enhanced, thus avoiding water leakage when the pump works under high pressure.

[0022] Because the water outlet on the pump body protrudes from the pump body, at least two sets of gaskets are provided. Separate gaskets facilitate installation of the gaskets to avoid interference during installation. If the gasket is round, it cannot be installed through the water outlet to the outer stop.

[0023] The gap between two adjacent sets of gaskets is located outside the longitudinal section of the water outlet on the pump body. The center axis of the water outlet and the center axis of the pump body are both located within the longitudinal section. The pressure at the water outlet is higher than the pressure elsewhere within the pump body. Therefore, the water pressure at the water outlet is transmitted to the connection between the pump body and the base. The water pressure extends along the longitudinal section to the connection between the pump body and the base, where it is subjected to greater pressure. If the gap between the gaskets is located in the longitudinal section of the water outlet, water leakage is likely to occur there, and the requirement that the pump assembly can withstand high pressure cannot be met. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a structural diagram of the stainless steel pump body assembly and the base from a first angle in the present invention;

[0025] Figure 2 This is a front view of the stainless steel pump body assembly and the base in the present utility model;

[0026] Figure 3 This is a structural diagram of the stainless steel pump body assembly and the base from a second angle in the present invention;

[0027] Figure 4 This is a structural diagram of the stainless steel pump body assembly in the present invention from a first angle;

[0028] Figure 5 This is a structural diagram of the stainless steel pump body assembly in the present invention from a second angle;

[0029] Figure 6 This is a schematic structural diagram of the first angle of the base in the present invention.

[0030] Among them, 1. Pump body; 10. Water outlet; 11. External stop; 111. Flange body; 112. Stop part; 2. Gasket; 3. Screw; 4. Machine base; 41. Internal stop. DETAILED DESCRIPTION

[0031] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0033] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0034] In the description of the present utility model, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0035] It should also be noted that, in the description of this utility model, unless otherwise specified or limited, the terms "disposed" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0036] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0037] The following describes in detail embodiments of the present invention. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0038] like Figures 1-6 As shown, a pump body assembly is provided in this embodiment, which can be applied to a booster water pump.

[0039] The above-mentioned pump body assembly includes a pump body 1 and a gasket 2, wherein the pump body 1 is provided with an outer stop 11, and the outer stop 11 is connected to the base 4. The base 4 here is a motor base. Specifically, the outer stop and the inner stop 41 are connected by screws 3 after being matched. More specifically, a screw hole is provided on the outer stop, and a threaded hole is provided on the inner stop 41, and the screws 3 are threadedly fixed to the threaded holes through the screw holes. Preferably, the above-mentioned pump body 1 is made of stainless steel. Precisely because the pump body 1 is made of stainless steel, if the overall thickness of the pump body 1 is increased to enhance the connection strength of the outer stop 11, the processing difficulty of the pump body 1 will be greatly increased, and the production cost will also be greatly increased. Therefore, in this embodiment, a gasket 2 is installed on the pump body 1.

[0040] Preferably, if Figure 4 and Figure 5 As shown, the specific structure of the outer stop 11 includes a flange body 111 and a stop portion 112 connected to the edge of the flange body 111 , and the stop portion 112 extends along the axial direction of the flange body 111 in a direction away from the pump body 1 .

[0041] At least two groups of gaskets 2 are provided on the back of the pump body 1. The gaskets 2 are in an arc shape. The two groups of gaskets 2 are evenly distributed along the circumference of the outer stop 11, and the gap between two adjacent groups of gaskets 2 does not exceed 2 mm. By providing gaskets 2 on the back of the pump body 1, the gaskets 2 are fastened together with the pump body 1 and the machine base 4 by screws 3. By increasing the strength of the outer stop 11, the pressure bearing capacity of the pump body 1 after being connected to the machine base 4 is increased, thereby avoiding water leakage when the pump is working under high pressure. If the gap between two adjacent groups of gaskets 2 exceeds 2 mm, the connection strength between the outer stop 11 and the machine base 4 at the gap will be insufficient, thus causing water leakage. Preferably, the gap between two adjacent groups of gaskets 2 is 0.5 mm, 1 mm, or 2 mm.

[0042] Because the water outlet 10 on the pump body 1 protrudes from the pump body 1, the outer stop 11 is located on one side of the water outlet, and the diameter of the outer stop 11 is larger than the diameter of the pump body 1, the gasket 2 needs to pass through the water outlet 10 and be installed on the outer stop 11 during installation. Therefore, at least two sets of gaskets 2 are provided, and the separate gaskets 2 facilitate installation of the gaskets 2 and avoid interference during installation. If the gasket 2 is round, the gasket 2 will be installed on the pump body 1 and cannot be assembled through the water outlet 10 and the outer stop 11.

[0043] The gap between two adjacent groups of gaskets 2 is set at a position outside the longitudinal section of the water outlet 10 on the pump body 1. The central axis of the water outlet 10 and the central axis of the pump body 1 are both located in the longitudinal section. The pressure at the water outlet 10 is higher than the pressure at other positions in the pump body 1. Therefore, the water pressure at the water outlet 10 is transmitted to the connection between the pump body 1 and the machine base 4, and the water pressure extends along the above longitudinal section to the connection between the pump body 1 and the machine base 4, which is under greater pressure. If the gap between the above-mentioned gaskets 2 is located in the longitudinal section of the water outlet 10, water leakage is likely to occur there, and the requirement that the pump body assembly can withstand high pressure cannot be met. Specifically, the gap between the above-mentioned two adjacent groups of gaskets 2 cannot be symmetrically set on both sides of the longitudinal section of the water outlet 10, or the distance between the gap between the above-mentioned two adjacent groups of gaskets 2 and the longitudinal section of the water outlet 10 should not be too close.

[0044] For the above reasons, based on the consideration of easy installation of the gaskets 2 and the consideration that the greater the number of gaskets 2, the greater the number of gaps between the gaskets 2, the more likely water leakage will occur, preferably, the gaskets 2 are provided in two groups, and the gaps between the two groups of gaskets 2 are located outside the longitudinal section of the water outlet 10.

[0045] The width D2 of the gasket 2 is smaller than the difference between the inner and outer diameters of the outer stop 11, which is 1-5 mm. Preferably, the thickness of the gasket 2 is in the range of 1.5 mm to 3 mm. If the thickness of the gasket 2 is less than 1.5 mm, the pressure-bearing capacity of the pump body 1 will still be poor. If the thickness of the gasket 2 exceeds 3 mm, the gasket 2 is too thick. Since the gasket 2 is stamped, the processing cost of the gasket 2 is significantly increased, making the cost too high.

[0046] Preferably, the material of the gasket 2 is stainless steel, and the material strength of the gasket 2 is not less than 205 Mbar. When selecting the material of the gasket 2, a safety factor is selected according to the yield strength of the selected material, and the range of the safety factor is 0.2-0.5.

[0047] The thickness of gasket 2 is related to the diameter of the pump body and the maximum pressure the pump body can withstand. Specifically, in actual applications, the wall thickness t is calculated based on the established pressure tolerance standard, where t is the sum of the thickness of the stopper portion 112 of the outer stopper where the pump body meets the pump body and the thickness of the gasket.

[0048] The maximum bearing pressure of the connection between the pump body 1 and the base 4 is P=2st / D1, where s is the relative yield strength of the material. Normally, the relative yield strength is the product of the yield strength of the material and the safety factor, and D1 is the diameter of the fitting position of the screw 3 installed on the outer stop.

[0049] After the pump body 1 and the base 4 are installed, the sum of the thicknesses of the gasket 2, the outer stop 11 and the inner stop 41 is t≥(0.1-0.15)P / s, where P is the maximum bearing pressure at the connection between the pump body 1 and the base 4, P≤3Mbar, and the strength s of the gasket (2) is not less than 205Mbar.

[0050] In a specific embodiment, the thickness of the pump body 1 is 1.5 mm, the diameter of the mating position of the screw 3 installed on the outer stop 11 of the pump body 1 is 200 mm, the thickness of the gasket used is 2 mm, and the maximum pressure bearing capacity of the pump body after installation is 3 Mbar.

[0051] If the gap between two adjacent sets of gaskets 2 is located along the longitudinal section of the water outlet 10, and particularly if the gap between two adjacent sets of gaskets 2 is symmetrically located on both sides of the longitudinal section of the water outlet 10, the thickness of the gaskets 2 should be in the range of 3mm-4mm. If the thickness of the gaskets 2 is less than 3mm, the gap strength will be insufficient after installation, and water leakage will still occur in the gaps on both sides of the gaskets 2. If the thickness of the gaskets 2 is greater than 4mm, the processing of the gaskets 2 will be significantly increased due to the stamping process, thereby increasing production costs.

[0052] More preferably, Figure 2 As shown, the width D2 of the gasket 2 ranges from 13 mm to 20 mm, so as to facilitate the installation of the screws 3 that fix the outer stop 11 and the inner stop 41 of the base 4 .

[0053] Preferably, the number of screws 3 is in the range of 6-8 groups, and the screws 3 are evenly distributed along the circumference of the outer stop 11. Specifically, as shown in Table 1, the relationship between the diameter D1 of the screws 3 installed on the outer stop 11 of the pump body 1, the number of screws 3 installed on the gasket 2, the specifications of the screws 3, and the width D2 of the gasket 2.

[0054] Table 1

[0055]

[0056] Table 1 further preferably shows the relationship between the diameter D1 of the mating position of the screws 3 installed on the outer stop 11, the number of screws 3, the specifications of the screws, and the width D2 of the gasket. When the above four parameters meet the corresponding conditions, the performance of the pump assembly reaches the optimal effect.

[0057] The pump body in this embodiment is made of stainless steel, and the material strength of the stainless steel is not less than 205Mbar. The diameter D1 of the mating position of the screw installed on the above-mentioned outer stop is in the range of 100mm-300mm. Preferably, the diameter D1 of the mating position of the screw 3 installed on the outer stop 11 is in the range of 100mm-200mm, the thickness of the gasket 2 is in the range of 1.5mm-3mm, the width D2 of the gasket 2 is in the range of 13mm-15mm, and the number of screws corresponding to this embodiment is 6-8 groups. The diameter D1 of the mating position of the screw 3 installed on the outer stop 11 is in the range of 200mm-250mm, the thickness of the gasket 2 is in the range of 1.5mm-3mm, the width D2 of the gasket 2 is in the range of 16mm-20mm, and the number of screws corresponding to this embodiment is 6-8 groups. When the above selection is made, the pressure bearing capacity is optimal when the pump is working.

[0058] This embodiment also provides a pump, which includes the above-mentioned pump body assembly. During use, the pump significantly improves the pressure-bearing capacity, allowing the pump body assembly to meet the high-pressure design requirements at a low cost.

[0059] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A pump assembly, characterized in that: include: The pump body (1) is provided with an outer stop (11), and the outer stop (11) is connected to the inner stop (41) of the machine base (4) via screws (3); Gaskets (2), at least two groups of arc-shaped gaskets (2) are arranged on the upper back of the pump body (1) along the circumferential direction, and the gap between two adjacent groups of gaskets (2) does not exceed 2 mm; the gap between the two adjacent groups of gaskets (2) is arranged at a position outside the longitudinal section of the water outlet (10) on the pump body (1), and the central axis of the water outlet (10) and the central axis of the pump body (1) are both located within the longitudinal section; The width dimension D2 of the gasket (2) is smaller than the difference between the inner and outer diameters of the outer stop (11) by 1-5 mm; After the pump body (1) and the machine base (4) are installed, the sum of the thicknesses of the gasket (2), the outer stop (11) and the inner stop (41) is t≥(0.1-0.15)P / s, where P is the maximum bearing pressure at the connection between the pump body (1) and the machine base (4), P≤3Mbar, and the strength s of the gasket (2) is not less than 205Mbar; The gasket (2), the outer stop (11) and the machine base (4) are fixedly connected by the screws (3).

2. The pump assembly according to claim 1, characterized in that The gap between two adjacent groups of gaskets (2) is 0.5 mm, 1 mm or 2 mm.

3. The pump assembly according to claim 2, characterized in that: The diameter D1 of the matching position of the screw (3) installed on the outer stop (11) ranges from 100 mm to 300 mm.

4. The pump assembly according to claim 3, characterized in that The number of the screws (3) ranges from 6 to 8 groups.

5. The pump assembly according to claim 4, characterized in that The outer stop (11) comprises a flange body (111) and a stop portion (112) connected to the edge of the flange body (111), wherein the stop portion (112) extends in an axial direction of the flange body (111) in a direction away from the pump body (1); The inner stop (41) is inserted into the stop portion (112).

6. The pump assembly according to any one of claims 1 to 5, characterized in that: The thickness of the gasket (2) ranges from 1.5 mm to 3 mm.

7. The pump assembly according to any one of claims 1 to 5, characterized in that: The gasket (2) is made of stainless steel.

8. The pump assembly according to any one of claims 1 to 5, characterized in that: The outer stop (11) is provided with a screw hole, the inner stop (41) is provided with a threaded hole, and the screw (3) is passed through the screw hole and is threadedly connected to the threaded hole.

9. A pump, characterized in that: The pump body assembly comprises the pump body assembly according to any one of claims 1 to 8.

Images