Adjustable flow chemical delivery pump

Abstract

The utility model relates to chemical industry conveying pump technical field discloses a kind of flow-adjustable chemical industry conveying pumps, including base, connecting portion, shaft coupling and main pump, the top of base is fixedly connected main pump, the rear end of adjusting pipe is fixedly connected extension, the front end of main pump is provided with notch and fixedly connected sealing ring, extension is inserted in the notch of the front end of main pump and extrudes sealing ring, the threaded column on the flange plate one of adjusting pipe front end is threadedly connected with the fixed screw on the flange plate two of the front end of main pump, the rotating column in the top of adjusting pipe is rotatably connected lead screw.The utility model is driven adjusting ball lifting by hand wheel drive screw rod to change through-flow area to realize flow regulation, extrude sealing ring and flange locking by extension to build double leakproof barrier, effectively solve the problem of inconvenient flow regulation and poor sealing at connecting portion in prior art.

Description

Technical Field

[0001] This utility model relates to the field of fluid transport machinery technology, and in particular to a chemical transport pump with adjustable flow rate. Background Technology

[0002] As a core power equipment in the chemical industry production process, chemical transfer pumps are widely used in the pressurization and transportation of various acid and alkali solutions, organic solvents and other liquid chemical raw materials. The continuity of their operation and the reliability of their sealing are directly related to the efficiency of the chemical production line and the safety of the on-site working environment.

[0003] However, existing chemical transfer pumps have revealed shortcomings in practical applications, such as limited structural functionality and insufficient sealing. Typically, the pump primarily provides fluid power. When the production process requires real-time adjustment of the medium's flow rate according to the reaction progress, it is often necessary to install an independent regulating valve in series on the external pipeline. This traditional approach not only increases the complexity and space required for the pipeline system, but more importantly, for scenarios involving the frequent transport of corrosive, toxic, and volatile chemical media, the introduction of external valves and the use of conventional flat flange connections increase the risk of system leakage. Especially under conditions of continuous vibration from long-term high-speed pump operation, simple flange connections can lead to loose fasteners, resulting in sealing interface failure and potential media leakage. Currently, the market lacks a device that integrates flow regulation functionality into the pump inlet structure and can significantly improve the vibration-resistant sealing performance of the connection through structural innovation.

[0004] Therefore, this utility model proposes an adjustable flow rate chemical transfer pump to overcome the shortcomings of the prior art. Utility Model Content

[0005] In view of the problems existing in the chemical transfer pump technology, such as poor sealing performance at the connection between the pump body and the external pipeline, leakage of high-risk chemical media due to equipment vibration or medium pressure fluctuations, difficulty in directly and accurately adjusting the medium flow rate during the transfer process, and the need to rely on external independent valves, which leads to complex structure and inconvenient installation, this utility model aims to provide a chemical transfer pump with an improved structure that can effectively solve the above problems and has an adjustable flow rate.

[0006] This utility model provides an adjustable flow chemical transfer pump, comprising: a base, a connecting part, a coupling, and a main pump. The top of the base is fixedly connected to the connecting part, and the front side of the top of the base is fixedly connected to the main pump. The front end of the coupling is rotatably connected to the interior of the main pump. The pump also includes an adjusting pipe, a rotating column, a handwheel, a lead screw, an adjusting ball, a first flange, a threaded column, a sealing ring, a fixing screw, an extension, and a second flange.

[0007] The front end of the main pump is fixedly connected to the second flange, and the front end of the main pump has a slot adapted to the extension, with the sealing ring fixedly connected inside the slot; the front end of the regulating pipe is fixedly connected to the first flange, and the rear end of the regulating pipe is fixedly connected to the extension.

[0008] Furthermore, the extension is inserted into the slot at the front end of the main pump and compresses the sealing ring, forming a radial seal through the compression fit between the outer wall of the extension and the sealing ring; the fixing screw is fixedly connected in the slot of the second flange, and the threaded post is rotatably connected in the slot of the first flange. The end faces of the second flange and the first flange are kept in close contact and aligned. The threaded post is threadedly connected to the fixing screw, and the threaded connection provides axial locking force, thereby maintaining the compression state of the extension on the sealing ring.

[0009] Meanwhile, the top of the regulating tube is connected to the rotating column, the inside of the rotating column is rotatably connected to the lead screw, the top of the lead screw is fixedly connected to the handwheel, the bottom of the lead screw is fixedly connected to the regulating ball, and the regulating ball is movably disposed inside the regulating tube, so that the flow rate can be adjusted by changing the position of the regulating ball.

[0010] Preferably, the rear top side of the base is used to fix the motor, the connecting part is fixed to the middle position of the top of the base to provide support, and the rear end of the coupling is used to fix the motor, thereby constructing a complete power drive structure.

[0011] Preferably, an impeller is fixedly connected to the front end of the coupling. The impeller is located inside the main pump and rotates synchronously with the coupling. The rotation of the impeller is used to pressurize and transport the medium entering the pump body.

[0012] Preferably, the regulating tube and the extension are integrally formed to ensure the strength of the connection. The outer diameter of the extension is adapted to the inner diameter of the front end slot of the main pump to ensure alignment during insertion.

[0013] Preferably, the threaded post can rotate relative to the first flange to adjust the angle of the threaded post and align it with the fixing screw on the second flange for locking. This design facilitates quick location of the locking position during flange docking.

[0014] Preferably, the rotating column is vertically fixed to the top of the regulating tube, and a through hole is provided inside the rotating column. The lead screw passes through the rotating column and extends into the internal flow channel of the regulating tube.

[0015] Preferably, the lead screw and the rotating column are connected by a threaded connection. Rotating the handwheel can drive the lead screw to move up and down relative to the rotating column, thereby converting the rotational motion into linear adjustment motion.

[0016] Preferably, the adjusting ball moves up or down inside the adjusting tube along with the lead screw, and the adjusting ball is located in the internal channel of the adjusting tube, serving as a flow-blocking element suspended in the flow channel.

[0017] Preferably, the up-and-down movement of the regulating ball can change the flow area between the regulating ball and the internal channel of the regulating tube, thereby achieving linear flow rate regulation by changing the size of the flow cross section.

[0018] This utility model has the following beneficial effects: 1. This utility model solves the problem that existing chemical conveying pumps are difficult to directly and conveniently adjust the flow rate during the conveying process by setting a flow adjustment mechanism consisting of a rotating column, a lead screw, a handwheel, and an adjusting ball at the top of the regulating pipe. It achieves the effect that the operator only needs to turn the handwheel to drive the lead screw to rotate, which can drive the internal adjusting ball to move up and down, thereby changing the flow area inside the pipe and realizing linear fine adjustment of the flow rate of the chemical medium. Moreover, it has a compact structure and does not require the installation of an additional independent regulating valve.

[0019] 2. This utility model solves the problem of poor sealing performance at the connection between the pump body and the pipeline, which can lead to leakage of high-risk chemical media due to equipment vibration or medium pressure fluctuations. It achieves a double leak-proof barrier by using the radial interference seal formed by the extension and the sealing ring and the axial clamping force provided by the flange locking assembly. This significantly improves the sealing reliability and safety of the equipment when conveying corrosive or hazardous media.

[0020] 3. This utility model solves the problems of cumbersome disassembly and assembly and difficulty in centering in narrow spaces in the traditional flange connection method by using the matching connection structure between the threaded post on flange one and the fixing screw on flange two. It achieves a fast and stable connection and locking between the regulating pipe and the main pump body, which not only ensures the overall rigidity and vibration resistance of the connection structure, but also greatly facilitates the subsequent inspection and maintenance of the impeller or seals inside the pump body. Attached Figure Description

[0021] Figure 1 A perspective view of an adjustable flow rate chemical transfer pump proposed in this utility model; Figure 2 This is a front view of an adjustable flow chemical transfer pump proposed in this utility model; Figure 3 This is a cross-sectional view of the regulating pipe in an adjustable flow chemical transfer pump proposed in this utility model. Figure 4 This is a split view of flange two in an adjustable flow chemical transfer pump proposed in this utility model.

[0022] Legend: 1. Base; 2. Connecting part; 3. Coupling; 4. Main pump; 5. Adjusting pipe; 6. Rotating column; 7. Handwheel; 8. Lead screw; 9. Adjusting ball; 10. Flange one; 11. Threaded column; 12. Sealing ring; 13. Fixing screw; 14. Extension part; 15. Flange two. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0024] Example: Please refer to Figures 1 to 4 This utility model provides an adjustable flow rate chemical transfer pump, which aims to solve the structural defects in existing chemical transfer pump technology, such as poor sealing performance at the connection between the pump body and the pipeline leading to media leakage, and difficulty in accurately and conveniently adjusting the flow rate during the transfer process.

[0025] like Figure 1 and Figure 2 As shown, an adjustable flow chemical transfer pump includes a base 1, a connecting part 2, a coupling 3, and a main pump 4. The base 1 serves as the mounting foundation for the entire device, supporting all components and ensuring the stability of the equipment during operation. The connecting part 2 is fixedly connected to the top center of the base 1 to provide an intermediate support structure. The main pump 4 is fixedly connected to the top front side of the base 1. The main pump 4, as the core working component, is used to pressurize and transport chemical media through centrifugal force or thrust generated internally. The coupling 3 is located behind the main pump 4. The front end of the coupling 3 is rotatably connected to the internal cavity of the main pump 4, and the rear end of the coupling 3 is fixedly connected to the output shaft of an external motor. The motor transmits rotational power to the inside of the main pump 4 through the coupling 3. An impeller is fixedly connected to the front end of the coupling 3. The impeller is located inside the main pump 4 and rotates synchronously with the coupling 3. The rotation of the impeller directly performs work on the medium inside the main pump 4 to complete the high-pressure transport of the chemical medium.

[0026] To achieve flow regulation during the chemical medium transportation process and a reliable sealing connection at the feed end, the system also includes a regulating pipe 5, a rotating column 6, a handwheel 7, a lead screw 8, a regulating ball 9, a flange 10, a threaded column 11, a sealing ring 12, a fixing screw 13, an extension 14, and a flange 2 15. These components together constitute the flow regulation system and the reinforced sealing connection system of the chemical transfer pump. The regulating pipe 5 serves as the channel carrier before the medium enters the main pump 4, and integrates the flow regulation mechanism inside. It also achieves a leak-proof connection with the main pump 4 through a special connection structure.

[0027] To effectively address the problem of high-risk media leakage caused by insufficient sealing at the connection between the pump body and pipeline during chemical media transportation, as well as the structural defects of traditional connection methods that loosen under long-term vibration, the adjustable flow chemical transfer pump in this embodiment is specially designed with a connection assembly containing multiple sealing guarantees. The connection assembly is mainly composed of flange 10, threaded column 11, sealing ring 12, fixing screw 13, extension 14, and flange 2 15.

[0028] Please refer to Figure 3 and Figure 4 The front end of the main pump 4 is fixedly connected to a flange 15. A groove is opened on the side of the flange 15 and a fixing screw 13 is fixedly connected in the groove. In order to accommodate the insertion and installation of the regulating pipe 5, a groove of a specific size is specially opened at the center of the front end of the main pump 4. A sealing ring 12 is fixedly connected inside the groove. The sealing ring 12 is made of corrosion-resistant and highly resilient rubber material to adapt to harsh chemical environments. The regulating pipe 5 is the conveying channel of the main pump 4 as the medium. The front end of the regulating pipe 5 is fixedly connected to a flange 10. A groove is opened on the side of the flange 10 at the corresponding position and a threaded post 11 is rotatably connected in the groove. The rear end of the regulating pipe 5 is integrally formed with an extension 14. The outer diameter of the extension 14 is precisely matched with the inner diameter of the groove at the front end of the main pump 4.

[0029] During assembly, the extension 14 is inserted axially into the slot at the front end of the main pump 4. The end surface of the extension 14 directly contacts and forcefully presses the sealing ring 12 located in the slot. This pressing fit formed by the extension 14 and the sealing ring 12 creates the first anti-leakage barrier at the connection interface between the regulating pipe 5 and the main pump 4. At the same time, the flange 10 on the regulating pipe 5 and the flange 2 15 on the main pump 4 are aligned end to end. The threaded post 11 on the flange 10 is adjusted to engage with the fixing screw 13 on the flange 2 15. The stable threaded connection formed between the threaded post 11 and the fixing screw 13 tightly locks the flange 10 and the flange 2 15. The locking force of the flange 10 and the flange 2 15 acts directly on the regulating pipe 5, forcing the extension 14 at the rear end of the regulating pipe 5 to continuously press the sealing ring 12, thereby effectively preventing loosening of the connection and failure of the seal due to equipment vibration or medium pressure fluctuation.

[0030] Based on the above embodiments, the present invention may also include the following preferred technical solutions to further refine the specific structural details of power transmission and flow regulation.

[0031] In a preferred embodiment, to ensure that the power source can stably provide rotational torque to the pump body and guarantee the coaxiality of the transmission system, a motor mounting hole is provided on the top rear side plane of the base 1 for fixing and connecting an external drive motor. The connecting part 2 is fixedly installed at the top center of the base 1 as an intermediate support. The rear end of the coupling 3 is fixedly connected to the output shaft of the motor by a key connection or flange connection. The front end of the coupling 3 extends through the pump cover into the internal cavity of the main pump 4 and is fixedly connected to an impeller. The impeller, as the core working component of the fluid machinery, is placed inside the pump casing of the main pump 4. When the motor starts, it drives the coupling 3 to rotate, and the coupling 3 drives the impeller to rotate synchronously at high speed. The centrifugal force generated by the rotation of the impeller is used to pressurize and transport the chemical medium entering from the regulating pipe 5.

[0032] As a preferred embodiment of the flow regulating mechanism, in order to achieve mechanical manual fine adjustment of the flow rate of the medium in the pipeline, the rotating column 6 is vertically welded or integrally cast and fixed to the top outer wall of the regulating pipe 5. The central axis of the rotating column 6 is perpendicular to the axis of the regulating pipe 5. The rotating column 6 has a through hole with internal threads. The outer surface of the lead screw 8 is machined with an external thread that matches the internal thread of the rotating column 6. The lead screw 8 passes through the rotating column 6 and extends into the internal flow channel of the regulating pipe 5. A handwheel 7 is fixedly connected to the top of the lead screw 8 for easy gripping by the operator. A threaded transmission engagement is formed between the lead screw 8 and the rotating column 6. By manually turning the handwheel 7, the lead screw 8 can be driven to make a vertical spiral lifting and lowering motion relative to the rotating column 6.

[0033] As a preferred embodiment of the flow regulation actuator, in order to accurately control the medium flow area and reduce fluid resistance, the regulating ball 9 is fixedly connected to the bottom end of the lead screw 8 located inside the regulating tube 5. The regulating ball 9 is suspended in the internal channel of the regulating tube 5. The regulating ball 9 moves vertically towards or away from the bottom of the inner wall of the regulating tube 5 as the lead screw 8 rises and falls. The outer surface of the regulating ball 9 is processed into a smooth spherical surface. The different height positions of the regulating ball 9 inside the regulating tube 5 directly determine the size of the annular flow gap formed between the regulating ball 9 and the inner wall of the regulating tube 5. By changing the area of ​​this gap, the continuous regulation of the flow rate of the chemical medium can be achieved.

[0034] As a preferred embodiment of the connection structure optimization, in order to improve the fault tolerance of installation alignment and ensure the compression effect of the sealing components, the regulating pipe 5 and the extension 14 are integrally molded from corrosion-resistant materials to ensure structural strength. The outer diameter of the extension 14 and the inner diameter of the front end slot of the main pump 4 are fitted with clearance or transition fit. The threaded post 11 on the flange 10 is rotatably connected to the slot on the side of the flange 10 through a pin structure. The threaded post 11 can swing around the pin at a certain angle. During the installation process, the operator can rotate and adjust the angle of the threaded post 11 so that the threaded post 11 can be smoothly inserted into the fixing screw 13 position on the flange 2 15. Then, the flange 10 and the flange 2 15 are locked and fixed by tightening the nut.

[0035] Working principle: When the equipment starts to transport chemical media, the external motor installed on the rear side of the base 1 starts and outputs rotational power. The motor drives the coupling 3 to rotate at high speed through the output shaft. The coupling 3 drives the impeller located inside the main pump 4 to rotate synchronously. The rotation of the impeller does work on the chemical media entering the cavity of the main pump 4. The media is pressurized under the action of centrifugal force and is transported out from the main pump 4. During this process, the base 1 and the connecting part 2 provide a stable support for the entire power transmission system, ensuring mechanical stability during high-speed operation. To ensure sealing during transport and prevent media leakage, the extension 14 at the rear end of the regulating pipe 5 is inserted into the groove at the front end of the main pump 4. The outer wall of the extension 14 directly presses the sealing ring 12 in the groove to form the first seal. At the same time, the threaded post 11 on the flange 10 is rotated to make it threadedly fastened to the fixing screw 13 on the flange 2. The axial tension generated by the threaded connection makes the extension 14 continuously press the sealing ring 12. This structure utilizes the interference fit between the extension 14 and the sealing ring 12 and the mechanical locking between the flange 10 and the flange 2 to achieve a highly reliable sealing connection between the regulating pipe 5 and the main pump 4. When the flow rate of the chemical medium needs to be adjusted according to process requirements, the operator manually turns the handwheel 7, which drives the lead screw 8 to rotate. Since there is a threaded connection between the lead screw 8 and the rotating column 6 fixed on the regulating pipe 5, the rotational motion of the lead screw 8 is converted into linear motion in the vertical direction. The lead screw 8 drives the regulating ball 9 at the bottom to move up or down inside the regulating pipe 5. When the regulating ball 9 moves downward, the flow gap between the regulating ball 9 and the inner wall of the regulating pipe 5 decreases, thereby reducing the flow rate. When the regulating ball 9 moves upward, the flow gap increases, thereby increasing the flow rate. By controlling the lifting and lowering position of the regulating ball 9, precise control of the conveying flow rate can be achieved.

Claims

1. An adjustable flow chemical transfer pump, comprising a base (1), a connecting part (2), a coupling (3) and a main pump (4), wherein the top of the base (1) is fixedly connected to the connecting part (2), the front side of the top of the base (1) is fixedly connected to the main pump (4), and the front end of the coupling (3) is rotatably connected to the interior of the main pump (4). Its features are, It also includes an adjusting pipe (5), a rotating column (6), a handwheel (7), a lead screw (8), an adjusting ball (9), a flange one (10), a threaded column (11), a sealing ring (12), a fixing screw (13), an extension (14), and a flange two (15). The front end of the main pump (4) is fixedly connected to the flange two (15), and the front end of the main pump (4) is provided with a slot adapted to the extension part (14), and the sealing ring (12) is fixedly connected in the slot; the front end of the regulating pipe (5) is fixedly connected to the flange one (10), and the rear end of the regulating pipe (5) is fixedly connected to the extension part (14), and the extension part (14) is inserted into the slot at the front end of the main pump (4) and squeezes the sealing ring (12). The fixing screw (13) is fixedly connected in the groove of the second flange (15), and the threaded column (11) is rotatably connected in the groove of the first flange (10). The second flange (15) is aligned with the first flange (10), and the threaded column (11) is threadedly connected to the fixing screw (13). The top of the adjusting tube (5) is connected to the rotating column (6), the inside of the rotating column (6) is rotatably connected to the lead screw (8), the top of the lead screw (8) is fixedly connected to the handwheel (7), the bottom of the lead screw (8) is fixedly connected to the adjusting ball (9), and the adjusting ball (9) is movably disposed inside the adjusting tube (5).

2. The adjustable flow rate chemical transfer pump according to claim 1, characterized in that, The rear top of the base (1) is used to fix the motor, the connecting part (2) is fixed to the middle of the top of the base (1), and the rear end of the coupling (3) is used to fix the motor.

3. The adjustable flow rate chemical transfer pump according to claim 1, characterized in that, An impeller is fixedly connected to the front end of the coupling (3). The impeller is located inside the main pump (4) and rotates with the coupling (3).

4. The adjustable flow rate chemical transfer pump according to claim 1, characterized in that, The regulating pipe (5) and the extension (14) are integrally formed, and the outer diameter of the extension (14) is adapted to the inner diameter of the front end slot of the main pump (4).

5. The adjustable flow rate chemical transfer pump according to claim 1, characterized in that, The threaded post (11) is rotatable relative to the first flange (10) to adjust the angle of the threaded post (11) and align it with the fixing screw (13) on the second flange (15) for locking.

6. The adjustable flow rate chemical transfer pump according to claim 1, characterized in that, The rotating column (6) is vertically fixed to the top of the adjusting tube (5), and the lead screw (8) passes through the rotating column (6) and extends into the interior of the adjusting tube (5).

7. The adjustable flow rate chemical transfer pump according to claim 1, characterized in that, The lead screw (8) and the rotating column (6) are connected by a threaded connection. Rotating the handwheel (7) can drive the lead screw (8) to move up and down relative to the rotating column (6).

8. A chemical transfer pump with adjustable flow rate according to claim 7, characterized in that, The adjusting ball (9) moves up or down inside the adjusting tube (5) along with the lead screw (8), and the adjusting ball (9) is located in the internal channel of the adjusting tube (5).

9. A chemical transfer pump with adjustable flow rate according to claim 8, characterized in that, The up-and-down movement of the regulating ball (9) can change the flow area between the regulating ball (9) and the internal channel of the regulating tube (5).

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