Tubular peristaltic pump

Abstract

The invention relates to a tubless peristaltic pump. Comprising a platform type pump body, a peristaltic pumping unit, a driving unit and a replaceable upper-layer mounting plate or buffer assembly. A positioning connecting part is arranged at the top of the platform type pump body, and a pump cavity is formed in the platform type pump body; the peristaltic pumping unit is arranged in the pump cavity and comprises an annular membrane, the outer side of the annular membrane and the inner wall of the pump cavity form an annular fluid conveying cavity, and an extension part arranged above the annular membrane is in sealing fit with the platform type pump body and is located between the fluid inlet and the fluid outlet; the driving unit is connected with the peristaltic pumping unit; a butt joint structure matched with the positioning connecting part is arranged at the bottom of the replaceable upper-layer mounting plate or the buffer assembly, the replaceable upper-layer mounting plate or the buffer assembly is detachably installed on the top of the platform type pump body, a channel communicated with the fluid inlet and the fluid outlet is formed in the replaceable upper-layer mounting plate or the buffer assembly, and a buffer cavity is formed in the buffer assembly. The detachable connection of the pump body and the upper-layer assembly is realized through the modular design, and the flexibility and the maintenance convenience of the equipment are improved.

Description

Technical Field

[0001] This invention relates to the field of fluid transport equipment technology, and more particularly to a tubeless peristaltic pump. Background Technology

[0002] Existing tubeless peristaltic pump technology has the following shortcomings: First, poor interface compatibility. The interfaces of existing tubeless peristaltic pumps are mostly integrated with the pump body. When adapting to different pipe specifications or interfaces in different locations, the entire pump body often needs to be replaced, which is complex and costly, seriously affecting the equipment's versatility and economy. Second, difficulty in pulsation control. To reduce delivery pulsation, some tubeless peristaltic pumps require the addition of an independent buffer structure outside the pump body. This not only occupies extra space and increases the number of parts, but also significantly increases the user's operating and maintenance costs. Finally, significant vibration issues and diaphragm damage. Without an effective buffering mechanism, fluid pulsation will impact pump body components, easily causing large vibrations and significant axial movement, affecting the user experience. Furthermore, under high-pressure conditions, the diaphragm is easily squeezed to the fluid inlet and outlet positions, causing damage and seriously affecting the equipment's service life and reliability. Summary of the Invention

[0003] This invention aims to overcome the problems of poor interface compatibility, difficulty in integrating buffer structures, large vibration, and structural cost contradictions in existing tubeless peristaltic pumps. It provides a platform-type tubeless peristaltic pump that allows for quick interface adjustment by replacing the upper mounting plate, can integrate a buffer chamber to reduce pulsation without occupying extra space, and does not change the core structure. At the same time, it reduces vibration, lowers costs, and extends service life.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: According to one aspect of the present invention, a tubeless peristaltic pump is provided, comprising: a platform-type pump body having a positioning connection portion at its top and a pump chamber formed therein, wherein a fluid inlet and a fluid outlet are provided at the top of the pump chamber; a peristaltic pumping unit disposed within the pump chamber, the peristaltic pumping unit including an annular diaphragm, the outer side of the annular diaphragm forming an annular fluid delivery cavity with the inner wall of the pump chamber, an extension portion being provided above the annular diaphragm, the extension portion being sealed to the platform-type pump body and located between the fluid inlet and the fluid outlet; a drive unit connected to the peristaltic pumping unit; and a replaceable upper mounting plate or buffer assembly having a docking structure at its bottom matching the positioning connection portion and being detachably mounted to the top of the platform-type pump body via the docking structure, wherein the upper mounting plate or buffer assembly has a channel communicating with the fluid inlet and the fluid outlet; wherein, when it is a buffer assembly, a buffer cavity is formed therein.

[0005] Optionally, a transition groove is provided on the inner wall of the platform pump body at the fluid inlet and fluid outlet, and the transition groove extends axially.

[0006] Optionally, the positioning connection and the docking structure may be one or more combinations of mutually cooperating positioning holes and positioning pins, slots and buckles, or threaded holes and screws.

[0007] Optionally, when it is a buffer assembly, it has an independent inlet buffer chamber and an outlet buffer chamber inside, the inlet buffer chamber being connected to the fluid inlet and the outlet buffer chamber being connected to the fluid outlet.

[0008] Optionally, the volumes of the inlet buffer chamber and the outlet buffer chamber are set to be unequal.

[0009] Optionally, the buffer assembly extends in either the height or length direction.

[0010] Optionally, the peristaltic pumping unit further includes a squeezing member disposed inside the annular diaphragm and periodically squeezing the annular diaphragm under the drive of the driving unit.

[0011] Optionally, the elongated portion may be provided with a reinforcing insert, the reinforcing insert having a positioning protrusion, and the platform pump body having a positioning groove that mates with the positioning protrusion; or, an integrally formed gasket may be provided above the elongated portion, and the platform pump body having a sealing plate mounting portion that mates with the gasket.

[0012] Optionally, the drive unit includes a motor and an eccentric wheel, the output shaft of the motor is connected to the eccentric wheel, and the eccentric wheel is connected to the peristaltic pumping unit through a bearing; or, the output shaft of the motor is connected to a synchronous disk, and at least one roller assembly is provided on the synchronous disk, the roller assembly being in contact with the peristaltic pumping unit.

[0013] Optionally, the platform pump body is fixedly connected to the motor via a mounting plate. The advantages of implementing this invention are: 1. High scalability: The interface is flexible and efficient. Different interface specifications can be switched by simply replacing the upper mounting plate. The platform pump body can be adapted to various buffer chamber structures without replacing the entire pump body structure. It is a modular design, which reduces the adaptation cost and greatly improves the equipment's versatility. 2. Low pulsation and minimal axial movement: The buffer chamber can be flexibly superimposed on the pump body without changing the internal design of the pump body. Different volumes of buffer chambers can be installed or replaced according to the conveying requirements to adapt to different pulsation control requirements. After installing the buffer chamber, the vibration is significantly reduced, effectively absorbing the impact of fluid pulsation, reducing the transmission of component vibration, and significantly reducing the vibration amplitude of the pump body. The pump body is fixed together with the mounting plate and motor, resulting in minimal axial movement and greater stability.

[0014] 3. Long diaphragm life: The transition groove on the inner wall of the platform pump body prevents the diaphragm from being squeezed into the port at the fluid inlet and outlet during operation, preventing diaphragm damage after prolonged compression under high pressure and better protecting the diaphragm. At the same time, the appropriate depth setting does not increase the additional dead zone volume. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall assembly of the tubeless peristaltic pump described in this invention; Figure 2 This is a schematic diagram of the overall assembly of another tubeless peristaltic pump described in this invention; Figure 3 This is an exploded view of the tubeless peristaltic pump with an upper mounting plate according to the present invention; Figure 4 This is an exploded view of the tubeless peristaltic pump with buffer assembly described in this invention. Figure 5 This is a schematic diagram of the structure of the buffer cavity described in this invention; Figure 6 This is a schematic diagram of the transition groove described in this invention; Figure 7 This is a schematic diagram of Embodiment 2 of the present invention; Figure 8 This is a schematic diagram of Embodiment 3 of the present invention; Figure 9 This is a schematic diagram of Embodiment 4 of the present invention.

[0017] The components include: 1. Platform pump body; 101. Positioning connection part; 102. Pump chamber; 103. Transition groove; 104. Positioning groove; 105. Sealing plate installation part; 2. Annular diaphragm; 201. Extension part; 2011. Positioning protrusion; 2012. Gasket; 3. Upper mounting plate; 4. Buffer assembly; 401. Inlet buffer chamber; 402. Outlet buffer chamber; 5. Motor; 6. Eccentric wheel; 7. Bearing; 8. Mounting plate. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Example 1 like Figures 1 to 6 As shown, this embodiment provides a tubeless peristaltic pump, including a platform pump body 1, a peristaltic pumping unit, a drive unit, and a replaceable upper mounting plate 3 or a buffer assembly 4.

[0020] The platform-type pump body 1 serves as the core support structure, with a positioning connection part 101 at its top and a pump chamber 102 formed inside. A fluid inlet and a fluid outlet are formed at the top of the pump chamber 102. Transition grooves 103 are provided on the inner wall of the platform-type pump body 1 at the fluid inlet and outlet. These transition grooves 103 extend axially, their length covering the working width of the diaphragm, their depth matching the working extrusion depth of the diaphragm, and they smoothly transition into the pump chamber 102. These transition grooves 103 accommodate the annular diaphragm 2 when it is extruded, preventing the diaphragm from being squeezed into the fluid inlet or outlet, thus protecting the diaphragm from damage. The platform-type pump body 1 is fixedly connected to the motor 5 via a mounting plate 8 to reduce axial movement during operation.

[0021] The peristaltic pumping unit is disposed within the pump chamber 102 of the platform pump body 1, and includes an annular diaphragm 2 and a squeezing member. The outer side of the annular diaphragm 2 forms an annular fluid delivery chamber with the inner wall of the pump chamber 102. An extension 201 is disposed above the annular diaphragm 2, which is sealed to the platform pump body 1 and located between the fluid inlet and the fluid outlet to prevent fluid from flowing directly from the fluid inlet to the fluid outlet. The squeezing member is disposed inside the annular diaphragm 2 and periodically squeezes the annular diaphragm 2 under the drive of the drive unit.

[0022] The drive unit includes a motor 5 and an eccentric wheel 6. The output shaft of the motor 5 is connected to the eccentric wheel 6, and the eccentric wheel 6 is connected to the extrusion component of the peristaltic pump unit via a bearing 7. After the motor 5 starts, it drives the eccentric wheel 6 to rotate around the output shaft. The bearing 7 on the eccentric wheel 6 periodically extrudes the annular diaphragm 2, causing the extrusion component to periodically extrude the annular diaphragm 2, forming a continuous peristaltic wave and realizing the directional transport of fluid. The motor can be a stepper motor, a brushed / brushless motor, etc., and a gearbox mechanism can also be provided.

[0023] The replaceable upper mounting plate 3 or buffer assembly 4 has a mating structure at its bottom that matches the positioning connection part 101, and is detachably mounted to the top of the platform pump body 1 via the mating structure. The positioning connection part 101 and the mating structure are one or more combinations of mutually cooperating positioning holes and positioning pins, slots and buckles, or threaded holes and screws. The upper mounting plate 3 or buffer assembly 4 has a channel inside that communicates with the fluid inlet and fluid outlet.

[0024] When the upper mounting plate 3 is installed, its side is provided with interfaces for connecting external pipelines (such as pagoda interfaces, threaded interfaces, quick-connect interfaces, etc.). By replacing the upper mounting plate 3 with different interface specifications, it can be adapted to different pipelines.

[0025] When buffer assembly 4 is installed, a buffer cavity is formed inside it. Specifically, buffer assembly 4 has two independent inlet buffer cavity 401 and outlet buffer cavity 402. Inlet buffer cavity 401 is connected to the fluid inlet, and outlet buffer cavity 402 is connected to the fluid outlet. The volumes of inlet buffer cavity 401 and outlet buffer cavity 402 can be unequal to accommodate different buffering requirements. Buffer assembly 4 extends in either the height or length direction. The buffer cavity located in the length direction not only facilitates manufacturing but also reduces the overall volume while achieving better pulse buffering effect.

[0026] During operation, fluid is drawn into the pump chamber 102 through the upper mounting plate 3 or buffer assembly 4 via the fluid inlet. Under the periodic squeezing action of the extruder, the fluid is pushed circumferentially within the annular fluid delivery chamber formed by the annular diaphragm 2 and the inner wall of the pump chamber 102 until it is delivered to the fluid outlet, and then flows out from the outlet of the upper mounting plate 3 or buffer assembly 4, completing the fluid delivery. When the buffer assembly 4 is installed, the fluid enters the buffer chamber, and the buffer chamber, through the elastic volume adjustment of its internal cavity, counteracts the fluid pulsation impact and reduces the vibration transmission of the fluid to the pipeline and pump body.

[0027] Example 2 like Figure 7 As shown, this embodiment is basically the same as embodiment one, except that the positioning structure of the annular diaphragm 2 has been improved.

[0028] In this embodiment, a reinforcing insert is embedded in the elongated portion 201, and a positioning protrusion 2011 is provided on the reinforcing insert. The platform pump body 1 is provided with a positioning groove 104 that mates with the positioning protrusion 2011. Through the cooperation between the positioning protrusion 2011 and the groove, the relative position of the diaphragm will not change after long-term operation, based on the original screw fixation, thereby ensuring the stable operation of the pump and reducing the size of the pump.

[0029] Example 3 like Figure 8As shown, this embodiment is basically the same as embodiment one, except that the sealing structure of the annular diaphragm 2 has been improved.

[0030] In this embodiment, an integrally formed gasket 2012 is provided above the elongated portion 201, and a sealing plate mounting portion 105 that mates with the gasket 2012 is provided on the platform pump body 1. Through the cooperation between the integrally formed gasket 2012 and the sealing plate mounting portion 105, the relative position of the diaphragm is further ensured to remain unchanged after long-term operation, based on the original screw fixing, thereby ensuring stable pump operation and further reducing the pump's size. Simultaneously, a reinforcing insert is embedded within the elongated portion 201 to ensure good rigidity of the diaphragm after long-term operation, ensuring a seal and preventing deflection.

[0031] Example 4 like Figure 9 As shown, this embodiment is basically the same as embodiment one, except for the way the buffer component 4 is set.

[0032] To achieve better pulsation reduction, the height of the buffer cavity is often increased, but this increases the overall volume. In this embodiment, the buffer component 4 extends along the length direction, forming a buffer cavity along the length direction. This arrangement not only facilitates manufacturing but also reduces the overall volume while achieving better pulse buffering.

[0033] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A tubeless peristaltic pump, characterized in that, include: A platform-type pump body is provided with a positioning connection part on the top and a pump chamber is formed inside it. A fluid inlet and a fluid outlet are opened on the top of the pump chamber. A peristaltic pumping unit is disposed in the pump chamber. The peristaltic pumping unit includes an annular diaphragm. The outer side of the annular diaphragm and the inner wall of the pump chamber form an annular fluid delivery chamber. An extension is provided above the annular diaphragm. The extension is sealed to the platform pump body and is located between the fluid inlet and the fluid outlet. A drive unit is connected to the peristaltic pumping unit; A replaceable upper mounting plate or buffer assembly is provided at its bottom with a docking structure that matches the positioning connection part, and is detachably installed on the top of the platform pump body through the docking structure. The upper mounting plate or buffer assembly is provided with a channel communicating with the fluid inlet and the fluid outlet. When it is a buffer component, a buffer cavity is formed inside it.

2. The tubeless peristaltic pump according to claim 1, characterized in that, A transition groove is provided on the inner wall of the platform pump body at the fluid inlet and fluid outlet, and the transition groove extends axially.

3. The tubeless peristaltic pump according to claim 1, characterized in that, The positioning connection and the docking structure are one or more combinations of mutually cooperating positioning holes and positioning pins, slots and buckles, or threaded holes and screws.

4. The tubeless peristaltic pump according to claim 1, characterized in that, When it is a buffer assembly, it has an independent inlet buffer chamber and an outlet buffer chamber inside. The inlet buffer chamber is connected to the fluid inlet, and the outlet buffer chamber is connected to the fluid outlet.

5. The tubeless peristaltic pump according to claim 4, characterized in that, The volumes of the inlet buffer chamber and the outlet buffer chamber are set to be unequal.

6. The tubeless peristaltic pump according to claim 1 or 4, characterized in that, The buffer assembly extends in either the height or length direction.

7. The tubeless peristaltic pump according to claim 1, characterized in that, The peristaltic pumping unit further includes a squeezing member disposed inside the annular diaphragm and periodically squeezing the annular diaphragm under the drive of the driving unit.

8. The tubeless peristaltic pump according to claim 1, characterized in that, The elongated portion is embedded with a reinforcing insert, the reinforcing insert is provided with a positioning protrusion, and the platform pump body is provided with a positioning groove that mates with the positioning protrusion; or, an integrally formed gasket is provided above the elongated portion, and the platform pump body is provided with a sealing plate mounting part that mates with the gasket.

9. The tubeless peristaltic pump according to claim 1, characterized in that, The drive unit includes a motor and an eccentric wheel. The output shaft of the motor is connected to the eccentric wheel, and the eccentric wheel is connected to the peristaltic pumping unit through a bearing. Alternatively, the output shaft of the motor is connected to a synchronization disk, and at least one roller assembly is provided on the synchronization disk, the roller assembly being in contact with the peristaltic pumping unit.

10. The tubeless peristaltic pump according to claim 9, characterized in that, The platform-type pump body is fixedly connected to the motor via a mounting plate.

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