Integrated pump shell and diaphragm pump with same

Abstract

The utility model relates to an integrated pump case and a diaphragm pump with the same, the integrated pump case comprises a pump case body, the pump case body is integrally formed by injection molding, and a rotating shaft cavity, a piston cavity and a diaphragm cavity are formed in the pump case body; the rotating shaft cavity is located in the center of the pump shell body and used for containing an eccentric rotating shaft, the rotating shaft cavity is communicated with the piston cavity, the piston cavity is used for containing a connecting rod and a piston, the piston reciprocates in the axis direction of the piston cavity, the piston cavity is communicated with the diaphragm cavity, and the diaphragm cavity is communicated with the rotating shaft cavity. The diaphragm cavity is used for containing a diaphragm piece, and an oil inlet pipeline and an oil outlet pipeline are further formed in the pump shell body. The failure rate of the diaphragm pump can be reduced, and the heat dissipation effect can be improved.

Description

Technical Field

[0001] The utility model relates to the field of diaphragm pumps, in particular to an integrated pump casing and a diaphragm pump having the pump casing. Background Art

[0002] A diaphragm pump is a positive displacement pump that uses a diaphragm to separate the fluid being pumped from the pump cylinder, and utilizes the diaphragm's vibrations to draw in and out the fluid. Diaphragm pumps are primarily categorized as plunger diaphragm pumps, hydraulic diaphragm pumps, and pneumatic diaphragm pumps. In existing plunger diaphragm pumps, the cylinder liner and pump casing are separate components connected by bolts. Currently, at least eight bolts are typically used to secure the connection between the cylinder liner and the pump casing. When a diaphragm pump operates at high speed and pressure, the rotation of the eccentric shaft within the pump generates high-frequency vibrations, which can easily loosen the connecting bolts. Once a bolt becomes loose, the pump must be shut down and repaired, otherwise the cylinder liner and piston will become misaligned, preventing proper and efficient operation. When a diaphragm pump operates at high speed and pressure, it generates a significant amount of heat. This heat is generated by the rotation of the eccentric shaft at the pump's center and by friction between the piston and cylinder liner. Because the cylinder liner and pump housing are separate and the cylinder liner is mostly made of cast iron, the heat conduction efficiency of the cast iron cylinder liner is low. When the diaphragm pump is running at high speed and high pressure, it is very easy for the cylinder liner to overheat due to untimely heat dissipation, thus requiring shutdown for heat dissipation. For example, Chinese utility model patent CN219888226U discloses a diaphragm pump comprising a pump housing, at least two mounting openings provided on the surface of the pump housing, a pump cover mounted on the mounting openings, a water outlet cavity provided on the front side wall of the pump housing, located around the pump housing, the water outlet cavity provided with a water outlet hole, a water inlet cavity provided on the rear side wall of the pump housing, located around the pump housing, the water inlet cavity provided with a water inlet hole, an opening connected to the water inlet cavity and the water outlet cavity at the front and rear ends of the pump cover, respectively, a one-way valve mounted on the opening, a drive shaft mounted on the pump housing, passing through the front and rear surfaces of the pump housing, the drive shaft being sealed to the pump housing, an eccentric structure provided in the middle of the drive shaft, the eccentric structure provided with the same number of piston structures as the pump cover, and the pump housing at the piston structure filled with lubricating oil. Another example is the diaphragm pump disclosed in Chinese invention patent CN114352505B, which includes a support beam, a memory alloy puller, a pump housing, and a diaphragm. The support beam is provided with an elastic plate, the ends of which are slidably connected to the support beam. The ends of the memory alloy puller are connected to the ends of the elastic plate and are arranged on the elastic plate. The pump housing is penetrated by a piston connected to the middle of the elastic plate. The diaphragm is arranged in the pump housing and forms a compression chamber with the pump housing. The diaphragm can be squeezed by the piston to compress the compression chamber. The pump housing and cylinder liner in the aforementioned two patents are split structures, both of which have technical problems such as high failure rate and poor heat dissipation effect.

[0003] In view of this, the present invention provides an integrated pump casing and a diaphragm pump having the pump casing, wherein the pump casing body is integrally formed by injection molding and a piston cavity is formed in the pump casing body during the injection molding to replace the cylinder sleeve in the prior art, thereby eliminating the need to use bolts to connect the cylinder sleeve and the pump casing to solve the technical problem of the high failure rate of the diaphragm pump in the prior art; at the same time, an integrally formed pump casing body and a piston cavity formed by injection molding in the pump casing body are adopted and the pump casing body is made of aluminum alloy material, thereby improving the thermal conductivity and heat dissipation effect to solve the technical problem of poor heat dissipation effect in the prior art. Utility Model Content

[0004] The present invention aims to provide an integrated pump casing and a diaphragm pump having the pump casing to solve the deficiencies in the prior art. The technical problems to be solved by the present invention are achieved through the following technical solutions.

[0005] A one-piece pump casing, including a pump casing body, the improvement of which is that: the pump casing body is formed as a whole by injection molding, and a rotating shaft cavity, a piston cavity and a diaphragm cavity are formed inside the pump casing body; the rotating shaft cavity is located at the center of the pump casing body, the rotating shaft cavity is used to accommodate an eccentric rotating shaft, the rotating shaft cavity is connected to the piston cavity, the piston cavity is used to accommodate a connecting rod and a piston, the piston reciprocates along the axial direction of the piston cavity, the piston cavity is connected to the diaphragm cavity, the diaphragm cavity is used to accommodate a diaphragm, and an oil inlet pipeline and an oil outlet pipeline are also formed inside the pump casing body.

[0006] Preferably, a gland connection portion is formed at the end of the diaphragm cavity away from the rotating shaft cavity, and a gland is connected to the gland connection portion to compress and seal the diaphragm sheet located in the diaphragm cavity.

[0007] Preferably, a shaft connection portion and a cover connection portion are formed on both sides of the shaft cavity respectively, the shaft connection portion is used to be connected to an external power device, and the cover is connected to the cover connection portion to seal the shaft cavity.

[0008] Preferably, an oil inlet plugging cavity is formed at the end of the oil inlet pipeline away from the rotating shaft cavity, and the oil inlet plugging cavity is used to accommodate an oil inlet plug.

[0009] Preferably, an oil outlet plugging cavity is formed at the end of the oil outlet pipeline away from the rotating shaft cavity, and the oil outlet plugging cavity is used to accommodate an oil outlet plug.

[0010] Preferably, the pump casing body is integrally formed by injection molding of aluminum alloy.

[0011] Preferably, the piston chambers and the diaphragm chambers are multiple groups corresponding one to one.

[0012] Preferably, the piston chambers and the diaphragm chambers are in groups of four, six or eight.

[0013] The utility model also provides a diaphragm pump, comprising a pump housing and a piston, wherein the improvement is that the pump housing is an integrated pump housing as described above.

[0014] Preferably, the piston is made of cast iron, and the piston reciprocates along the axis of the piston chamber.

[0015] In the present invention, the pump casing body is integrally formed by injection molding, and a shaft cavity, a piston cavity, and a diaphragm cavity are integrally formed inside the pump casing body during the injection molding process. The piston cavity of the pump casing body is used to accommodate the piston, thereby replacing the cylinder sleeve in the prior art. Therefore, there is no need to use bolts to connect the pump casing and the cylinder sleeve. In this way, the bolts will not loosen under high-frequency vibration of the diaphragm pump, thereby reducing the failure rate of the diaphragm pump. The integrally formed pump casing body and piston cavity are also conducive to heat conduction. The thermal conductivity of aluminum alloy materials is higher than that of cast iron cylinder sleeves, thereby improving the heat dissipation effect of the diaphragm pump itself. The diaphragm pump using the present invention can have an operating temperature 20°C lower than that of the diaphragm pump in the prior art under the same conditions, and has obvious heat dissipation and cooling effects. In short, the present invention can reduce the failure rate of the diaphragm pump and improve the heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 This is a side structural diagram of the present utility model;

[0018] Figure 3 This is a schematic cross-sectional view of the utility model;

[0019] The reference numerals in the accompanying drawings are: 1. pump casing body, 2. rotating shaft cavity, 3. piston cavity, 4. diaphragm cavity, 5. gland connection part, 6. rotating shaft connection part, 7. oil inlet pipeline, 8. oil outlet pipeline, 9. oil inlet plugging cavity, 10. oil outlet plugging cavity. DETAILED DESCRIPTION

[0020] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0021] Example 1:

[0022] Reference Figures 1 to 3As shown, an integrated pump casing includes a pump casing body 1, and its improvement is that: the pump casing body 1 is formed as a whole by injection molding, and a rotating shaft cavity 2, a piston cavity 3 and a diaphragm cavity 4 are formed inside the pump casing body 1; the rotating shaft cavity 2 is located at the center of the pump casing body 1, and the rotating shaft cavity 2 is used to accommodate an eccentric rotating shaft, and the rotating shaft cavity 2 is connected to the piston cavity 3, and the piston cavity 3 is used to accommodate a connecting rod and a piston, and the piston reciprocates along the axial direction of the piston cavity 3, and the piston cavity 3 is connected to the diaphragm cavity 4, and the diaphragm cavity 4 is used to accommodate a diaphragm, and an oil inlet pipeline 7 and an oil outlet pipeline 8 are also formed inside the pump casing body 1, and the pump casing body 1 is formed as a whole by injection molding of aluminum alloy.

[0023] In this embodiment, the pump casing body 1 is integrally formed by injection molding, and the shaft cavity 2, piston cavity 3 and diaphragm cavity 4 are integrally formed inside the pump casing body 1 during the injection molding. The piston cavity 3 of the pump casing body 1 is used to accommodate the piston, thereby replacing the cylinder sleeve in the prior art. Therefore, there is no need to use bolts to connect the pump casing and the cylinder sleeve. In this way, the bolts will not loosen under the high-frequency vibration of the diaphragm pump, thereby reducing the failure rate of the diaphragm pump. The integrally formed pump casing body 1 and piston cavity 3 are also conducive to heat conduction. The thermal conductivity of aluminum alloy material is higher than that of the cylinder sleeve made of cast iron material, thereby improving the heat dissipation effect of the diaphragm pump itself. The diaphragm pump using this embodiment can have an operating temperature 20°C lower than that of the diaphragm pump in the prior art under the same conditions, and has obvious heat dissipation and cooling effects.

[0024] Furthermore, a gland connection portion 5 is formed at the end of the diaphragm cavity 4 away from the rotating shaft cavity 2. After the gland is connected to the gland connection portion 5, it compresses and seals the diaphragm located in the diaphragm cavity 4. In this embodiment, the gland connection portion 5 is used to connect to the gland. After the diaphragm is installed in the diaphragm cavity 4, the gland is connected to the gland connection portion 5, thereby compressing and sealing the diaphragm.

[0025] Furthermore, a shaft connection portion 6 and a cover connection portion are formed on both sides of the shaft cavity 2 respectively. The shaft connection portion 6 is used to connect to an external power device, and the cover is connected to the cover connection portion to seal the shaft cavity 2.

[0026] Furthermore, the end of the oil inlet pipeline 7 away from the rotating shaft cavity 2 forms an oil inlet plugging cavity 9, and the oil inlet plugging cavity 9 is used to accommodate the oil inlet plug; the end of the oil outlet pipeline 8 away from the rotating shaft cavity 2 forms an oil outlet plugging cavity 10, and the oil outlet plugging cavity 10 is used to accommodate the oil outlet plug.

[0027] In this embodiment, the shaft connection part 6 is used to connect to an external power device, which can be an electric motor or a diesel engine. The output shaft of the external power device is connected to the eccentric shaft, and the external power device is connected to the shaft connection part 6, thereby sealing the connection between the pump housing body 1 and the external power device. After the cover connection part is installed with the cover, the shaft cavity 2 and the piston cavity 3 are sealed, and then the oil cavity is formed through the diaphragm. Oil is added to the oil cavity through the oil inlet line 7 to lubricate the piston, eccentric shaft and other components. When the oil needs to be replaced, the oil is released through the oil outlet line 8, and then new oil is added through the oil inlet line 7. The oil inlet blocking cavity 9 and the oil outlet blocking cavity 10 are used to block the oil inlet line 7 and the oil outlet line 8.

[0028] Furthermore, the piston chambers 3 and the diaphragm chambers 4 are in a one-to-one correspondence in a plurality of groups. Still further, the piston chambers 3 and the diaphragm chambers 4 are in a four-group, six-group or eight-group.

[0029] Example 2:

[0030] This embodiment provides a diaphragm pump, including a pump housing and a piston, and the improvement thereof is that the pump housing is the integrated pump housing described in Example 1.

[0031] Furthermore, the piston is made of cast iron, and the piston reciprocates along the axis direction of the piston chamber 3.

[0032] This embodiment forms the pump casing body as a whole through injection molding and forms a piston cavity in the pump casing body during the injection molding to replace the cylinder liner in the prior art, thereby eliminating the need to use bolts to connect the cylinder liner and the pump casing, thereby reducing the failure rate of the diaphragm pump; at the same time, the pump casing body is formed as a whole and the piston cavity is formed by injection molding in the pump casing body, and the pump casing body is made of aluminum alloy material, thereby improving the thermal conductivity and heat dissipation effect.

[0033] It should be noted that the above detailed description is exemplary and is intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the art to which this application belongs.

[0034] It should be noted that the terms used herein are intended only to describe specific embodiments and are not intended to limit the exemplary embodiments described herein. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0035] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, such that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0036] In addition, the terms "comprises" and "comprising" and any variations thereof are intended to cover a non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, product, or apparatus.

[0037] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be subsequently positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways, such as rotated 90 degrees or in other orientations, and the spatially relative descriptions used herein are interpreted accordingly.

[0038] In the above detailed description, reference is made to the accompanying drawings, which form a part hereof. In the drawings, similar symbols typically identify similar components, unless the context dictates otherwise. The illustrated embodiments described in the detailed description, drawings, and claims are not meant to be limiting. Other embodiments may be used, and other changes may be made, without departing from the spirit or scope of the subject matter presented herein.

[0039] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An integrated pump casing, comprising a pump casing body (1), characterized in that: The pump housing body (1) is integrally formed by injection molding, and a rotating shaft cavity (2), a piston cavity (3) and a diaphragm cavity (4) are formed inside the pump housing body (1); the rotating shaft cavity (2) is located at the center of the pump housing body (1), the rotating shaft cavity (2) is used to accommodate an eccentric rotating shaft, the rotating shaft cavity (2) is connected to the piston cavity (3), the piston cavity (3) is used to accommodate a connecting rod and a piston, and the piston reciprocates along the axial direction of the piston cavity (3), the piston cavity (3) is connected to the diaphragm cavity (4), and the diaphragm cavity (4) is used to accommodate a diaphragm. An oil inlet pipeline (7) and an oil outlet pipeline (8) are also formed inside the pump housing body (1).

2. The integrated pump casing according to claim 1, characterized in that: The end of the diaphragm cavity (4) away from the rotating shaft cavity (2) forms a gland connection portion (5), and the gland is connected to the gland connection portion (5) to compress and seal the diaphragm sheet located in the diaphragm cavity (4).

3. The integrated pump casing according to claim 1, characterized in that: A rotating shaft connection portion (6) and a cover connection portion are respectively formed on both sides of the rotating shaft cavity (2); the rotating shaft connection portion (6) is used to be connected to an external power device; and the cover is connected to the cover connection portion to seal the rotating shaft cavity (2).

4. The integrated pump casing according to claim 1, characterized in that: An oil inlet plugging cavity (9) is formed at the end of the oil inlet pipeline (7) away from the rotating shaft cavity (2), and the oil inlet plugging cavity (9) is used to accommodate an oil inlet plug.

5. The integrated pump casing according to claim 1, characterized in that: An oil outlet plugging cavity (10) is formed at the end of the oil outlet pipeline (8) away from the rotating shaft cavity (2), and the oil outlet plugging cavity (10) is used to accommodate an oil outlet plug.

6. The integrated pump casing according to claim 1, characterized in that: The pump casing body (1) is integrally formed by injection molding of aluminum alloy.

7. The integrated pump casing according to claim 1, characterized in that: The piston chamber (3) and the diaphragm chamber (4) are multiple groups corresponding to each other.

8. The integrated pump casing according to claim 7, characterized in that: The piston chambers (3) and the diaphragm chambers (4) are in groups of four, six or eight.

9. A diaphragm pump comprising a pump housing and a piston, characterized in that: The pump casing is an integrated pump casing as described in any one of claims 1-8.

10. A diaphragm pump according to claim 9, characterized in that: The piston is made of cast iron and reciprocates along the axis of the piston chamber (3).

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