Diaphragm pump

Abstract

The utility model relates to a diaphragm pump which comprises an end cover, a liquid inlet, a liquid flowing cavity and a liquid outlet, and one-way valves are arranged on the liquid inlet and the liquid outlet. The diaphragm assembly comprises a diaphragm body and a heat insulation medium, the diaphragm body is provided with a heat insulation cavity, and the heat insulation cavity is filled with the heat insulation medium; the hydraulic assembly comprises a hydraulic cylinder, a piston and hydraulic oil, the hydraulic cylinder comprises a hydraulic cavity with the two ends communicated, the diaphragm assembly is connected between the liquid flowing cavity and an opening in one side of the hydraulic cavity, and the piston is inserted into the hydraulic cavity from an opening in the other side of the hydraulic cavity and is in sliding connection with the hydraulic cylinder. A closed cavity defined by the diaphragm assembly, the hydraulic cylinder and the piston is filled with the hydraulic oil. A motor; and the transmission mechanism is respectively connected with the motor and the piston. By means of the diaphragm pump, the diaphragm assembly in the diaphragm pump isolates heat carried by the liquid to be conveyed from being transmitted to the hydraulic oil, so that viscosity reduction of the hydraulic oil is not prone to being caused, and the conveying capacity of the diaphragm pump can be guaranteed.

Description

Technical Field

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

[0002] In recent years, diaphragm pumps, as a type of conveying machinery, have seen rapid development and widespread application in industries such as coal chemical, non-ferrous metallurgy, mining, and environmental protection. Diaphragm pumps are highly effective for conveying various corrosive liquids, liquids containing solid particles, and volatile and flammable liquids, and are suitable for low-flow-rate applications. Therefore, diaphragm pumps can be used in a wide variety of industries, such as the sludge treatment industry in environmental technology, for conveying sludge at various stages of the sludge treatment process.

[0003] Diaphragm pumps typically use a motor-driven transmission mechanism, which in turn moves a piston to transport liquids. One possible transmission mechanism is a motor-driven crank that rotates, which in turn moves a slider, which in turn moves a piston, thus transporting the liquid. Alternatively, the transmission mechanism can be a motor-driven eccentric wheel that rotates, which in turn moves a rocker arm, which in turn moves a piston, thus transporting the liquid.

[0004] Currently, diaphragm pumps commonly used in the market are divided into gas-filled diaphragm pumps and hydraulic oil-filled diaphragm pumps according to the filling medium. Among them, gas-filled diaphragm pumps have limited delivery capacity for high-pressure conditions. For high-pressure conditions, hydraulic oil-filled diaphragm pumps are required.

[0005] However, in the process of realizing this utility model, the inventors discovered that for the current diaphragm pump filled with hydraulic oil, when the liquid to be transported has a temperature, the heat carried by the liquid to be transported is easily transferred to the hydraulic oil. When the temperature of the liquid to be transported exceeds a certain value, the heat transferred to the hydraulic oil can easily cause the viscosity and pressure of the hydraulic oil to decrease, thereby affecting the transport capacity of the diaphragm pump. Utility Model Content

[0006] In view of the above problems, this utility model provides a diaphragm pump that overcomes or at least partially solves the above problems.

[0007] According to one aspect of the present invention, a diaphragm pump is provided, comprising: an end cap having a liquid inlet, a liquid flow chamber, and a liquid outlet, wherein both the liquid inlet and the liquid outlet are provided with one-way valves; a diaphragm assembly having a diaphragm body and a heat insulation medium, the diaphragm body having a heat insulation chamber, the heat insulation medium filling the heat insulation chamber; a hydraulic assembly having a hydraulic cylinder, a piston, and hydraulic oil, the hydraulic cylinder having a hydraulic chamber extending through both ends, the diaphragm assembly being connected between the liquid flow chamber and an opening on one side of the hydraulic chamber, the piston being inserted into the hydraulic chamber from the other opening of the hydraulic chamber and slidably connected to the hydraulic cylinder, the hydraulic oil filling a closed cavity formed by the diaphragm assembly, the hydraulic cylinder, and the piston; a motor; and a transmission mechanism connected to the motor and the piston respectively, the motor driving the transmission mechanism to move, thereby causing the piston to slide, and thus pressurizing the diaphragm assembly through the hydraulic oil, so that the liquid to be transported entering the liquid flow chamber from the liquid inlet flows out from the liquid outlet.

[0008] In one alternative embodiment, the diaphragm body includes a first diaphragm and a second diaphragm, the edges of the first diaphragm and the second diaphragm are connected, and the middle portions of the first diaphragm and the second diaphragm form the heat insulation cavity; the first diaphragm is disposed near the liquid flow cavity, and the second diaphragm is open on the side near the hydraulic cavity, and the hydraulic oil fills the closed cavity formed by the second diaphragm, the hydraulic cylinder and the piston.

[0009] In one alternative embodiment, at least one of the first diaphragm and the second diaphragm is a fluororubber sheet.

[0010] In one alternative embodiment, at least one of the first and second diaphragms is a polytetrafluoroethylene (PTFE) elastic sheet.

[0011] In one alternative embodiment, the first diaphragm is a polytetrafluoroethylene elastic sheet, and the second diaphragm is a fluororubber sheet.

[0012] In one alternative embodiment, the diaphragm pump further includes a heat-insulating gasket disposed between the end cap and the hydraulic cylinder.

[0013] In one alternative, the heat insulation pad is integrally formed with the diaphragm body.

[0014] In one alternative, the end cap extends toward the liquid flow chamber with a limiting stage for abutting against the diaphragm assembly.

[0015] In one alternative embodiment, the hydraulic cylinder is provided with a limiting member located at the opening of the hydraulic chamber on the side near the diaphragm assembly. The limiting member has multiple hydraulic holes that communicate with the hydraulic chamber, and the limiting member is used to abut against the diaphragm assembly.

[0016] The beneficial effects of this utility model embodiment include: providing a diaphragm pump, including an end cap, a liquid inlet, a liquid flow chamber, and a liquid outlet, both the liquid inlet and the liquid outlet being equipped with one-way valves; a diaphragm assembly, including a diaphragm body and a heat insulation medium, the diaphragm body having a heat insulation chamber, the heat insulation medium filling the heat insulation chamber; a hydraulic assembly, including a hydraulic cylinder, a piston, and hydraulic oil, the hydraulic cylinder including a hydraulic chamber extending through both ends, the diaphragm assembly connected between the liquid flow chamber and one side opening of the hydraulic chamber, the piston inserted into the hydraulic chamber from the other side opening of the hydraulic chamber and slidably connected to the hydraulic cylinder, the hydraulic oil filling the closed cavity formed by the diaphragm assembly, the hydraulic cylinder, and the piston; a motor; a transmission mechanism, the transmission mechanism being connected to the motor and the piston respectively, the motor driving the transmission mechanism to move, thereby driving the piston to slide, and then pressurizing the diaphragm assembly through the hydraulic oil, so that the liquid to be transported entering the liquid flow chamber from the liquid inlet flows out from the liquid outlet. The diaphragm pump described above isolates the heat carried by the liquid being transported from the hydraulic oil. Even if the temperature of the liquid being transported exceeds the normal range, the heat carried by the liquid will be isolated by the diaphragm assembly, thus preventing the viscosity of the hydraulic oil from decreasing. This ensures the pumping capacity of the diaphragm pump. In other words, the diaphragm pump provided in this embodiment is suitable for high-pressure and high-temperature operating conditions. Attached Figure Description

[0017] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0018] Figure 1 This is a schematic diagram of a diaphragm pump provided in an embodiment of the present invention;

[0019] Figure 2 The embodiment of this utility model provides the following... Figure 1 A partial sectional view of AA;

[0020] Figure 3 This is a schematic diagram of a diaphragm assembly provided in an embodiment of the present invention.

[0021] The attached figures are labeled as follows:

[0022] Diaphragm pump 100;

[0023] End cap 10, diaphragm assembly 20, hydraulic assembly 30, motor 40, heat insulation pad 50;

[0024] Liquid inlet 101, liquid flow chamber 102, liquid outlet 103, limiting platform 104;

[0025] 201 diaphragm body; 202 heat insulation medium;

[0026] First diaphragm 2011, second diaphragm 2012;

[0027] Hydraulic cylinder 301, piston 302, hydraulic oil 303;

[0028] Hydraulic chamber 3011, limiting component 3012, hydraulic hole 3013, oil injection hole 3014, mounting hole 3015. Detailed Implementation

[0029] To facilitate understanding of this utility model, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected" to another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "vertical," "horizontal," "left," "right," "inner," "outer," and similar expressions used in this specification are for illustrative purposes only.

[0030] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0031] This invention aims to solve the problem of reduced conveying capacity of traditional diaphragm pumps due to heat transfer of the liquid to be conveyed to the hydraulic oil. It proposes a diaphragm pump with a diaphragm assembly containing a heat insulation chamber and heat insulation medium. By blocking the heat transfer path, the performance of the hydraulic oil is guaranteed, and stable conveying of the liquid to be conveyed is achieved under high pressure and high temperature conditions.

[0032] Please see Figure 1 and Figure 2The diaphragm pump 100 includes: an end cap 10, a diaphragm assembly 20, a hydraulic assembly 30, a motor 40, a transmission mechanism (not shown), and a heat insulation pad 50. The diaphragm assembly 20 and the heat insulation pad 50 are both connected between the end cap 10 and the hydraulic assembly 30. The motor 40 is connected to the transmission mechanism and drives the transmission mechanism to move, thereby pressurizing the diaphragm assembly 20 to transport the liquid to be conveyed in the liquid flow chamber of the end cap 10.

[0033] It is worth noting that in some embodiments, the heat insulation pad 50 may not be provided, and the functions of this utility model embodiment can still be achieved.

[0034] The end cap 10 is provided with a liquid inlet 101, a liquid flow chamber 102, a liquid outlet 103, and a limiting platform 104. The liquid inlet 101 is used for the liquid to be transported to enter, and is equipped with a one-way valve (not shown) to allow only the liquid to be transported to enter. The liquid flow chamber 102 is used for the flow of the liquid to be transported. The liquid outlet 103 is used for the outflow of the liquid to be transported, and is equipped with a one-way valve (not shown) to allow only the liquid to be transported to flow out. The limiting platform 104 is a component extending from the end cap 10 toward the liquid flow chamber 102. The limiting platform 104 abuts against the diaphragm assembly 20, thereby preventing excessive deformation of the diaphragm assembly 20 and enhancing the squeezing effect of the diaphragm assembly 20 on the liquid to be transported.

[0035] It is worth noting that in some embodiments, the aforementioned limiting platform 104 may not be provided, and the functions of this utility model embodiment can still be achieved.

[0036] It is worth noting that in some embodiments, the limiting platform 104 and the end cap 10 are integrally formed.

[0037] For the aforementioned diaphragm assembly 20, please refer to [the relevant documentation / reference]. Figure 2 and Figure 3The diaphragm assembly 20 includes a diaphragm body 201 and a heat insulation medium 202. The diaphragm body 201 has a heat insulation cavity (not shown), and the heat insulation medium 202 fills the heat insulation cavity. The diaphragm assembly 20 is used to connect the end cap 10 and the hydraulic cylinder 301. The diaphragm assembly 20 is used to squeeze the liquid to be transported in the liquid flow cavity 102 of the end cap 10 under the push of the hydraulic oil 303 in the hydraulic cylinder 301, and to make the liquid to be transported flow out from the liquid outlet 103. In addition, the diaphragm assembly 20 is provided with a heat insulation medium 202, which can isolate the heat carried by the liquid to be transported flowing in the end cap 10 from being transferred to the hydraulic cylinder 301, protect the hydraulic oil 303 in the hydraulic cylinder 301 from the influence of heat, ensure the effectiveness of the hydraulic oil 303, and thus ensure the transport effect of the diaphragm pump 100 provided in this embodiment of the present invention.

[0038] In some embodiments, the diaphragm body 201 includes a first diaphragm 2011 and a second diaphragm 2012, the edges of the first diaphragm 2011 and the second diaphragm 2012 are connected, and the middle portions of the first diaphragm 2011 and the second diaphragm 2012 form the heat insulation cavity. The first diaphragm 2011 is disposed near the liquid flow cavity 102, and the second diaphragm 2012 is disposed near the hydraulic cylinder 301. By providing the first diaphragm 2011 and the second diaphragm 2012, it is convenient for the heat insulation medium 202 to be filled into the heat insulation cavity, and it is also convenient for the processing and forming of the diaphragm body 201.

[0039] In some embodiments, at least one of the first diaphragm 2011 and the second diaphragm 2012 is a fluororubber sheet. The fluororubber sheet has certain heat resistance and heat insulation properties, thereby enhancing the heat insulation effect of the diaphragm assembly 20.

[0040] In some embodiments, at least one of the first diaphragm 2011 and the second diaphragm 2012 is a polytetrafluoroethylene elastic sheet, thereby enhancing the heat insulation effect of the diaphragm assembly 20.

[0041] In some embodiments, the first diaphragm 2011 is a polytetrafluoroethylene elastic sheet and the second diaphragm 2012 is a fluororubber sheet, which can also enhance the heat insulation effect of the diaphragm assembly 20.

[0042] It is worth noting that the aforementioned insulation medium 202 can be of various types, such as one or more of polystyrene foam, polyurethane foam, polyvinyl chloride foam, glass wool, asbestos, and porous concrete.

[0043] The hydraulic assembly 30 includes a hydraulic cylinder 301, a piston 302, and hydraulic oil 303. The hydraulic cylinder 301 includes a hydraulic chamber 3011 extending through both ends. A diaphragm assembly 20 is connected between the liquid flow chamber 102 and one side opening of the hydraulic chamber 3011. The piston 302 is inserted into the hydraulic chamber 3011 through the other side opening and is slidably connected to the hydraulic cylinder 301. The hydraulic oil 303 fills the closed cavity formed by the diaphragm assembly 20, the hydraulic cylinder 301, and the piston 302. When the piston 302 slides relative to the hydraulic cylinder 301, it pushes the hydraulic oil 303 and the diaphragm assembly 20, thereby pressurizing the liquid to be transported that enters the liquid flow chamber 102 from the liquid inlet 101 of the end cap 10, causing the liquid to flow out from the liquid outlet 103, thus realizing the transport of the liquid.

[0044] It is worth noting that when the diaphragm body 201 includes a first diaphragm 2011 and a second diaphragm 2012, the first diaphragm 2011 is disposed near the liquid flow chamber 102, and the second diaphragm 2012 is disposed with an opening on one side near the hydraulic chamber 3011. The hydraulic oil 303 fills the closed cavity formed by the second diaphragm 2012, the hydraulic cylinder 301 and the piston 302.

[0045] In some embodiments, the hydraulic cylinder 301 is provided with a limiting member 3012. The limiting member 3012 is located at the opening of the hydraulic chamber 3011 near the diaphragm assembly 20. The limiting member 3012 has multiple hydraulic holes 3013, which communicate with the hydraulic chamber 3011. The limiting member 3012 is used to abut against the diaphragm assembly 20. By providing the limiting member 3012, excessive deformation of the diaphragm assembly 20 toward the hydraulic cylinder 301 can be prevented, thereby extending the service life of the diaphragm assembly 20.

[0046] In some embodiments, the limiting member 3012 is integrally formed with the hydraulic cylinder 301.

[0047] In some embodiments, the hydraulic cylinder 301 is also provided with an oil injection hole 3014 for replacing the hydraulic oil 303, thereby ensuring the conveying effect of the diaphragm pump 100 on the liquid to be conveyed.

[0048] In some embodiments, the hydraulic cylinder 301 is further provided with a mounting hole 3015 for installing a safety valve, thereby ensuring the proper operation of the diaphragm pump 100.

[0049] For the aforementioned motor 40 and transmission mechanism, the transmission mechanism is connected to the motor 40 and the piston 302 in the hydraulic assembly 30, respectively. The motor 40 is used to drive the transmission mechanism to move, thereby causing the piston 302 to slide, and then pressurizing the diaphragm assembly 20 through the hydraulic oil 303, thereby squeezing the liquid to be transported from the liquid inlet 101 into the liquid flow chamber 102, so that the liquid to be transported flows out from the liquid outlet 103.

[0050] It is worth noting that the transmission mechanism can adopt existing structures. For example, the transmission mechanism can be a crank-slider structure, whereby the motor 40 drives the crank to rotate, the crank drives the slider to move, and the slider then drives the piston 302 to move, thereby realizing the transportation of the liquid to be transported. Alternatively, the transmission mechanism can also include an eccentric wheel and a rocker arm, whereby the motor 40 drives the eccentric wheel to rotate, the eccentric wheel drives the rocker arm to move, and finally the rocker arm drives the piston 302 to move, thus realizing the transportation of the liquid to be transported.

[0051] The heat insulation gasket 50 is disposed between the end cap 10 and the hydraulic cylinder 301. The heat insulation gasket 50 can be a fluororubber sheet or a polytetrafluoroethylene sheet, thereby isolating heat transfer between the end cap 10 and the hydraulic cylinder 301. This prevents the heat carried by the liquid to be transported from being transferred to the hydraulic oil 303 through the end cap 10 and the hydraulic cylinder 301, thus ensuring the good performance of the hydraulic oil 303 and the good operating performance of the diaphragm pump 100 provided in this embodiment of the invention.

[0052] In some embodiments, the heat insulation pad 50 is integrally formed with the diaphragm body 201.

[0053] In this embodiment of the utility model, the diaphragm pump 100 conveys the liquid to be conveyed in the following manner: the motor 40 drives the transmission mechanism to move, and the transmission mechanism drives the piston 302 to slide. When the piston 302 slides toward the end cover 10, the piston 302 pushes the hydraulic oil 303, and the hydraulic oil 303 pushes the diaphragm assembly 20, thereby squeezing the liquid to be conveyed from the liquid inlet 101 of the end cover 10 into the liquid flow chamber 102. Since both the liquid inlet 101 and the liquid outlet 103 are equipped with one-way valves, the squeezed liquid to be conveyed will flow out from the liquid outlet 103, thus realizing the conveying of the liquid to be conveyed.

[0054] In this embodiment of the utility model, a diaphragm pump 100 is provided, including an end cap 10, a liquid inlet 101, a liquid flow chamber 102, and a liquid outlet 103, both of which are equipped with one-way valves; a diaphragm assembly 20, including a diaphragm body 201 and a heat insulation medium 202, wherein the diaphragm body 201 has a heat insulation chamber, and the heat insulation medium 202 fills the heat insulation chamber; and a hydraulic assembly 30, including a hydraulic cylinder 301, a piston 302, and hydraulic oil 303, wherein the hydraulic cylinder 301 includes a hydraulic chamber 3011 extending through both ends, and the diaphragm assembly 20 is connected to the liquid flow chamber 102 and the hydraulic chamber 3011. Between the openings on one side, the piston 302 is inserted into the hydraulic chamber 3011 from the other side opening and is slidably connected to the hydraulic cylinder 301. The hydraulic oil 303 fills the closed cavity formed by the diaphragm assembly 20, the hydraulic cylinder 301, and the piston 302. The motor 40 and the transmission mechanism are connected to the motor 40 and the piston 302 respectively. The motor 40 is used to drive the transmission mechanism to move, thereby driving the piston 302 to slide, and then pressurizing the diaphragm assembly 20 through the hydraulic oil 303, so that the liquid to be transported in the liquid flow chamber 102 flows out from the liquid outlet 103. Through the diaphragm pump 100 described above, the diaphragm assembly 20 in the diaphragm pump 100 isolates the heat carried by the conveying liquid from being transferred to the hydraulic oil 303. Even if the temperature of the conveying liquid is higher than the normal range, the heat carried by the conveying liquid is isolated by the diaphragm assembly 20, so that it is not easy to cause the viscosity of the hydraulic oil 303 to decrease, thereby ensuring the conveying capacity of the diaphragm pump 100. In other words, the diaphragm pump 100 provided by this utility model embodiment is suitable for high pressure and high temperature working conditions.

[0055] In summary, the diaphragm pump of this invention effectively blocks heat transfer between the liquid to be transported and the hydraulic oil through a diaphragm assembly with a heat insulation cavity and a heat insulation medium, thus preventing the hydraulic oil performance from degrading due to high temperature. At the same time, the closed cavity of the hydraulic assembly ensures pressure transmission to adapt to high-pressure working conditions. Furthermore, a limiting structure is added to improve durability, ultimately achieving stable and efficient liquid transport under high temperature and high pressure.

[0056] It should be noted that while the preferred embodiments of this utility model are provided in the specification and accompanying drawings, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are not intended to impose additional limitations on the content of this utility model; their purpose is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Furthermore, the above-described technical features can be combined with each other to form various embodiments not listed above, all of which are considered to be within the scope of this utility model specification. Moreover, those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A diaphragm pump, characterized in that, include: The end cap is provided with a liquid inlet, a liquid flow chamber and a liquid outlet, and both the liquid inlet and the liquid outlet are equipped with one-way valves. A diaphragm assembly includes a diaphragm body and a heat insulation medium, wherein the diaphragm body has a heat insulation cavity and the heat insulation medium is filled in the heat insulation cavity; A hydraulic assembly includes a hydraulic cylinder, a piston, and hydraulic oil. The hydraulic cylinder includes a hydraulic chamber that extends through both ends. A diaphragm assembly is connected between the liquid flow chamber and an opening on one side of the hydraulic chamber. The piston is inserted into the hydraulic chamber from the other opening and is slidably connected to the hydraulic cylinder. The hydraulic oil fills a closed cavity formed by the diaphragm assembly, the hydraulic cylinder, and the piston. Electric motor; A transmission mechanism is connected to the motor and the piston respectively. The motor drives the transmission mechanism to move, thereby causing the piston to slide. In turn, the hydraulic oil pressurizes the diaphragm assembly, so that the liquid to be transported, which enters the liquid flow chamber from the liquid inlet, flows out from the liquid outlet.

2. The diaphragm pump according to claim 1, characterized in that, The diaphragm body includes a first diaphragm and a second diaphragm, the edges of the first diaphragm and the second diaphragm are connected, and the middle part of the first diaphragm and the middle part of the second diaphragm form the heat insulation cavity; The first diaphragm is disposed near the liquid flow chamber, and the second diaphragm is open on the side near the hydraulic chamber. The hydraulic oil fills the closed cavity formed by the second diaphragm, the hydraulic cylinder, and the piston.

3. The diaphragm pump according to claim 2, characterized in that, At least one of the first diaphragm and the second diaphragm is a fluororubber sheet.

4. The diaphragm pump according to claim 2, characterized in that, At least one of the first diaphragm and the second diaphragm is a polytetrafluoroethylene elastic sheet.

5. The diaphragm pump according to claim 2, characterized in that, The first diaphragm is a polytetrafluoroethylene elastic sheet, and the second diaphragm is a fluororubber sheet.

6. The diaphragm pump according to claim 1, characterized in that, The diaphragm pump also includes a heat insulation pad, which is disposed between the end cap and the hydraulic cylinder.

7. The diaphragm pump according to claim 6, characterized in that, The heat insulation pad is integrally formed with the diaphragm body.

8. The diaphragm pump according to claim 1, characterized in that, The end cap extends toward the liquid flow chamber with a limiting stage, which is used to abut against the diaphragm assembly.

9. The diaphragm pump according to claim 1, characterized in that, The hydraulic cylinder is provided with a limiting member, which is located on the side of the hydraulic cavity near the diaphragm assembly. The limiting member has multiple hydraulic holes that communicate with the hydraulic cavity, and the limiting member is used to abut against the diaphragm assembly.

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