Metering pump with a buffer structure

Abstract

The utility model provides a kind of metering pump with buffer structure, including metering pump body, liquid inlet pipe, liquid outlet pipe, buffer pipe, tubular shunt component, elastic sealing assembly and sensing early warning component: liquid inlet pipe, liquid outlet pipe are connected respectively in the liquid inlet end and liquid outlet end of metering pump body, buffer pipe is connected in the outer periphery of liquid inlet pipe, overflow shaft is installed in buffer pipe, and overflow shaft is divided into liquid inlet chamber and liquid outlet chamber in buffer pipe, and overflow hole is set in overflow shaft;Elastic sealing assembly is installed in liquid outlet chamber and blocks overflow hole.The utility model provides a kind of metering pump with buffer structure, by elastic sealing assembly and tubular shunt component cooperation, when liquid inlet pipe of metering pump body is blocked, water flow enters buffer pipe under the action of water pressure and opens the overflow hole of elastic sealing assembly, is discharged after shunting, plays the role of buffer pressure relief, avoids liquid inlet end component to be impacted strongly, protects metering pump liquid inlet end component, prolongs service life.

Description

Technical Field

[0001] This utility model relates to the field of metering pump technology, and specifically to a metering pump with a buffer structure. Background Technology

[0002] A metering pump is a reciprocating positive displacement pump that can precisely control the flow rate and pressure of fluids. It drives a plunger or diaphragm in the pump body through a drive device to achieve the intake and discharge of liquids. The main feature of a metering pump is that it maintains a constant flow rate regardless of the discharge pressure. This stability is crucial for maintaining the continuity of the process and the stability of product quality. Furthermore, the flow rate of a metering pump can be adjusted according to actual needs, supporting multiple methods such as manual adjustment, electric adjustment, and frequency conversion adjustment. This flexibility allows the metering pump to adapt to different process requirements and operating conditions. Therefore, metering pumps are widely used in many industrial fields such as petrochemical, pharmaceutical, food, and water treatment.

[0003] During the process of metering pumps transporting liquids, the liquids may contain solid impurities, particulate matter, or crystalline substances. With the long-term operation of the metering pump, these impurities will gradually deposit and adhere to the inner wall of the metering pump, causing the cross-sectional area of ​​the metering pump's delivery channel to gradually decrease. When the channel narrows to a certain extent, it will cause blockage. When blockage occurs, the liquid at the inlet cannot pass smoothly, and the pressure will increase instantly, generating a strong impact on the location of the inlet. This impact will not only obstruct the flow of liquid but may also damage the inlet components of the metering pump. Utility Model Content

[0004] This invention provides a metering pump with a buffer structure, which solves the problem in related technologies where solid impurities, particulate matter, or crystalline substances carried in the liquid will deposit on the inner wall of the metering pump, resulting in a reduction in the cross-sectional area of ​​the delivery channel and eventually causing blockage. After blockage occurs, the liquid at the inlet end cannot pass smoothly, the pressure increases instantaneously, and a strong impact is generated on the inlet end components, thereby damaging the inlet end components.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a metering pump with a buffer structure, comprising a metering pump body, an inlet pipe, an outlet pipe, a buffer pipe, a tubular diversion assembly, an elastic sealing assembly, and a sensing and early warning assembly.

[0006] The inlet pipe and outlet pipe are respectively connected to the inlet end and outlet end of the metering pump body. The buffer pipe is connected to the outer periphery of the inlet pipe. A flow shaft is installed inside the buffer pipe, and the flow shaft divides the buffer pipe into an inlet chamber and an outlet chamber. A through flow hole is opened inside the flow shaft.

[0007] The elastic sealing assembly is installed in the liquid outlet chamber and seals the flow passage, and the end of the elastic sealing assembly passes through the buffer tube away from the liquid inlet pipe. The tubular diversion assembly is connected between the buffer tube and the liquid outlet pipe and is in communication with the liquid outlet chamber. The sensing and early warning assembly is installed at the end of the buffer tube away from the liquid inlet pipe.

[0008] Preferably, the elastic sealing assembly includes a sealing piston and a rod-type elastic element. The rod-type elastic element is installed in the liquid outlet chamber, and one end of the rod-type elastic element slides through the buffer tube away from the end of the liquid inlet tube. The sealing piston is installed at the other end of the rod-type elastic element and presses against the side of the flow shaft.

[0009] Preferably, the rod-type elastic element includes an impact rod and a first spring. The impact rod is laterally disposed in the liquid outlet chamber. One end of the impact rod slides through the end of the buffer tube away from the liquid inlet tube and corresponds to the sensing and warning component. The sealing piston is installed on the other end of the impact rod. The first spring is sleeved on the impact rod, and both ends of the first spring are respectively connected to the sealing piston and the inner wall of the end of the buffer tube away from the liquid inlet tube.

[0010] Preferably, the tubular diversion assembly includes a diversion pipe and a one-way component. The diversion pipe is connected to the bottom of the buffer pipe and communicates with the liquid outlet chamber. A plurality of one-way components are arranged at intervals between the diversion pipe and the liquid outlet pipe.

[0011] Preferably, the one-way component includes a one-way tube, and a plurality of one-way tubes are connected between the diversion tube and the outlet tube, and a one-way valve is installed on the one-way tube.

[0012] Preferably, the sensing and warning assembly includes an assembly cylinder, a second spring, a pressure sensor, and an alarm. The assembly cylinder is mounted on the buffer tube via an assembly rod, and the assembly cylinder is located at the end of the buffer tube away from the liquid inlet pipe. The second spring is installed inside the assembly cylinder. The pressure sensor is installed at one end of the second spring and corresponds to the impact rod. The alarm is installed at one end of the assembly cylinder, and the pressure sensor and the alarm are electrically connected.

[0013] Preferably, the buffer tube is equipped with an elastic traction assembly connected to the impact rod; the elastic traction assembly includes a fixing ring and an elastic traction rope, the fixing ring is fixed at the end of the buffer tube away from the liquid inlet tube, and a plurality of circumferentially arranged elastic traction ropes are connected to the fixing ring, and the elastic traction ropes are connected to the outer periphery of the impact rod.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. When a blockage occurs inside the metering pump body, preventing water from flowing smoothly through the inlet pipe, water pressure forces it into the buffer pipe and applies pressure to the elastic sealing component. Under this pressure, the elastic sealing component moves away from the flow axis and opens its internal flow hole. Water then flows through the flow hole into the outlet chamber inside the buffer pipe and is diverted to the outlet pipe via the tubular diversion component before being discharged. This invention, through the combined action of the tubular diversion component and the elastic sealing component, can buffer and relieve pressure when water cannot flow smoothly through the inlet pipe, preventing a strong impact on the inlet components caused by a sudden increase in pressure. This effectively protects the inlet components of the metering pump body and extends its service life.

[0016] 2. When the water pressure impacts the elastic sealing component, causing it to move away from the flow shaft, the elastic sealing component can impact the sensing and early warning component during this process. After being impacted, the sensing and early warning component can issue an early warning in time to remind the staff that the metering pump body is blocked and that measures need to be taken in time to avoid more serious equipment damage or production accidents caused by the blockage not being detected in time.

[0017] 3. When the tubular diversion assembly diverts water to the outlet pipe, the water pressure at the inlet pipe end can be reduced to the minimum due to the presence of several one-way components on the tubular diversion assembly. This rapid pressure relief reduces the pressure accumulation at the blockage point and lowers the possibility of further compaction or accumulation of the blockage, thereby indirectly reducing the risk of further blockage and helping to maintain the normal operation of the metering pump. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of a metering pump with a buffer structure proposed in this utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the buffer tube and tubular diversion assembly of this utility model;

[0021] Figure 3 This is an internal cross-sectional view of the buffer tube of this utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the elastic sealing assembly and the elastic traction assembly of this utility model;

[0023] Figure 5 This is a schematic diagram of the structure of the sensing and early warning component of this utility model;

[0024] The following are the labeling elements in the diagram: 1. Metering pump body; 101. Inlet pipe; 102. Outlet pipe; 2. Buffer pipe; 21. Flow shaft; 211. Flow hole; 22. Assembly rod; 3. Tubular diverter assembly; 31. Diverter pipe; 32. One-way component; 321. One-way pipe; 322. One-way valve; 4. Elastic sealing assembly; 41. Sealing piston; 42. Rod-type elastic component; 421. Impact rod; 422. First spring; 5. Sensor warning assembly; 51. Assembly cylinder; 52. Second spring; 53. Pressure sensor; 54. Alarm; 6. Elastic traction assembly; 61. Fixing ring; 62. Elastic traction rope. Detailed Implementation

[0025] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] according to Figures 1 to 5 As shown, a metering pump with a buffer structure includes a metering pump body 1, an inlet pipe 101, an outlet pipe 102, a buffer pipe 2, a tubular diversion assembly 3, an elastic sealing assembly 4, and a sensing and early warning assembly 5.

[0027] The inlet pipe 101 and the outlet pipe 102 are respectively connected to the inlet end and the outlet end of the metering pump body 1. The buffer pipe 2 is connected to the outer periphery of the inlet pipe 101. The buffer pipe 2 is equipped with a flow shaft 21, and the flow shaft 21 divides the buffer pipe 2 into an inlet chamber and an outlet chamber. The flow shaft 21 has a through flow hole 211.

[0028] The elastic sealing component 4 is installed in the liquid outlet chamber and blocks the flow hole 211. The end of the elastic sealing component 4 passes through the buffer tube 2 and is away from the end of the inlet tube 101. The tubular diversion component 3 is connected between the buffer tube 2 and the liquid outlet tube 102 and is connected to the liquid outlet chamber. The sensing and early warning component 5 is installed in the buffer tube 2 and is away from the end of the inlet tube 101.

[0029] When the metering pump body 1 is working normally, liquid enters the metering pump body 1 from the inlet pipe 101 and is discharged from the outlet pipe 102. Once the metering pump body 1 is blocked, the liquid in the inlet pipe 101 cannot pass smoothly. At this time, the pressure increases and the liquid will enter the buffer pipe 2. The flow shaft 21 in the buffer pipe 2 divides it into an inlet chamber and an outlet chamber. After the liquid enters the inlet chamber, it will exert pressure on the elastic sealing component 4. Under the action of pressure, the elastic sealing component 4 opens the flow hole 211, and the liquid can enter the outlet chamber through the flow hole 211. Then, it flows into the outlet pipe 102 through the tubular diversion component 3 and is discharged. The sensing and early warning component 5 monitors the situation in the buffer pipe 2 in real time. If there is any abnormality, it can give an early warning in time. This design can buffer the pressure at the inlet pipe 101 when the metering pump is blocked, protect the inlet end components, and also notify the staff to deal with the blockage problem in time.

[0030] In a specific embodiment, the elastic sealing assembly 4 includes a sealing piston 41 and a rod-type elastic element 42. The rod-type elastic element 42 is installed in the liquid outlet chamber, and one end of the rod-type elastic element 42 slides through the end of the buffer tube 2 away from the liquid inlet tube 101. The sealing piston 41 is installed at the other end of the rod-type elastic element 42 and presses against the side of the flow shaft 21. When the pressure in the buffer tube 2 increases, the rod-type elastic element 42 will deform under force, pushing the sealing piston 41 away from the flow shaft 21, thereby opening the flow hole 211. This structural design ensures that the elastic sealing assembly 4 can reliably open and close the flow hole 211 under pressure, effectively control the flow of liquid, and ensure the stable operation of the buffering and pressure relief functions.

[0031] In a specific embodiment, the rod-type elastic element 42 includes an impact rod 421 and a first spring 422. The impact rod 421 is horizontally disposed in the liquid outlet chamber. One end of the impact rod 421 slides through the end of the buffer tube 2 away from the liquid inlet tube 101 and corresponds to the sensing and warning component 5. The sealing piston 41 is installed on the other end of the impact rod 421. The first spring 422 is sleeved on the impact rod 421, and both ends of the first spring 422 are respectively connected to the inner wall of the sealing piston 41 and the end of the buffer tube 2 away from the liquid inlet tube 101. When the liquid pressure pushes the sealing piston 41, the impact rod 421 moves synchronously, compressing the first spring 422, causing the sealing piston 41 to move away from the flow shaft 21, and the flow hole 211 opens. At the same time, the movement of the impact rod 421 will impact the sensing and warning component 5, triggering an alarm. The first spring 422 can provide a restoring force for the sealing piston 41, so that the sealing piston 41 returns to its original position after the pressure disappears, closing the flow hole 211, ensuring that the device can be reused, and improving the reliability and stability of the metering pump in the event of blockage.

[0032] In a specific embodiment, the tubular diversion assembly 3 includes a diversion pipe 31 and a one-way component 32. The diversion pipe 31 is connected to the bottom of the buffer pipe 2 and communicates with the liquid outlet chamber. Several one-way components 32 are arranged at intervals between the diversion pipe 31 and the liquid outlet pipe 102. When liquid enters the liquid outlet chamber, it will flow through the diversion pipe 31. The one-way component 32 ensures that the liquid can only flow from the diversion pipe 31 to the liquid outlet pipe 102, preventing liquid backflow. This can efficiently guide the liquid in the buffer pipe 2 to the liquid outlet pipe 102, realize diversion and pressure relief, reduce the pressure in the liquid inlet pipe 101, reduce the pressure accumulation at the blockage point, and reduce the risk of blockage aggravation.

[0033] In a specific embodiment, the one-way component 32 includes a one-way pipe 321. Several one-way pipes 321 are connected between the diversion pipe 31 and the outlet pipe 102. A one-way valve 322 is installed on the one-way pipe 321. The one-way valve 322 further enhances the one-way conduction function. It will only open when the liquid pressure reaches a certain value and the flow direction is correct, effectively preventing the liquid in the outlet pipe 102 from flowing back to the diversion pipe 31, ensuring that the liquid flows stably from the buffer pipe 2 to the outlet pipe 102, and improving the diversion and pressure relief effect and stability.

[0034] In a specific embodiment, the sensing and early warning component 5 includes an assembly cylinder 51, a second spring 52, a pressure sensor 53, and an alarm 54. The assembly cylinder 51 is mounted on the buffer tube 2 via an assembly rod 22, and the assembly cylinder 51 is located at the end of the buffer tube 2 away from the inlet pipe 101. The second spring 52 is installed inside the assembly cylinder 51, and the pressure sensor 53 is installed at one end of the second spring 52 and corresponds to the impact rod 421. The alarm 54 is installed at one end of the assembly cylinder 51, and the pressure sensor 53 and the alarm 54 are electrically connected. When the impact rod 421 is subjected to pressure and moves to impact the pressure sensor 53, the pressure sensor 53 detects the pressure change and transmits a signal to the alarm 54, which then sounds an alarm. The second spring 52 acts as a buffer and reset mechanism, preventing the impact rod 421 from excessively impacting the pressure sensor 53 and causing damage. At the same time, it allows the pressure sensor 53 to return to its initial state in a timely manner for the next detection, thus realizing the function of timely reminding staff to deal with blockage problems.

[0035] In a specific embodiment, an elastic traction assembly 6 connected to the impact rod 421 is installed on the buffer tube 2. The elastic traction assembly 6 includes a fixing ring 61 and an elastic traction rope 62. The fixing ring 61 is fixed at the end of the buffer tube 2 away from the liquid inlet pipe 101. Several circumferentially arranged elastic traction ropes 62 are connected to the fixing ring 61, and the elastic traction ropes 62 are connected to the outer periphery of the impact rod 421. When the impact rod 421 moves, the elastic traction ropes 62 will generate a certain tension on it, limiting the movement range of the impact rod 421, preventing the impact rod 421 from moving excessively due to excessive pressure, avoiding excessive separation between the sealing piston 41 and the flow shaft 21, ensuring the sealing effect and the stability of the device, and also assisting the impact rod 421 to reset.

[0036] The specific working principle of this utility model is as follows:

[0037] During normal operation, liquid enters the metering pump body 1 through the inlet pipe 101 and is discharged from the outlet pipe 102. Once the metering pump body 1 is blocked, the pressure in the inlet pipe 101 increases, and the liquid enters the inlet chamber of the buffer pipe 2. The pressure pushes the sealing piston 41 in the elastic sealing assembly 4, and the impact rod 421 of the rod elastic element 42 compresses the first spring 422, causing the sealing piston 41 to move away from the flow shaft 21, opening the flow hole 211, and the liquid enters the outlet chamber.

[0038] The liquid flows through the diversion pipe 31 of the tubular diversion assembly 3 in the outlet chamber, and the one-way pipe 321 and one-way valve 322 in the one-way component 32 ensure that the liquid flows unidirectionally to the outlet pipe 102, thereby achieving diversion and pressure relief and reducing the pressure in the inlet pipe 101.

[0039] When the elastic sealing assembly 4 is activated, the impact rod 421 moves the pressure sensor 53 in the impact sensing and early warning assembly 5. The pressure sensor 53 transmits a signal to the alarm 54 to issue an alarm, reminding the staff to deal with the blockage. The elastic traction rope 62 of the elastic traction assembly 6 limits the movement of the impact rod 421, assists in its reset, ensures the stable operation of the entire device, protects the liquid inlet end component of the metering pump body 1, and extends the service life of the metering pump body 1.

[0040] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A metering pump with a buffer structure, characterized in that... It includes a metering pump body (1), an inlet pipe (101), an outlet pipe (102), a buffer pipe (2), a tubular diversion assembly (3), an elastic sealing assembly (4), and a sensing and early warning assembly (5): The inlet pipe (101) and outlet pipe (102) are respectively connected to the inlet end and outlet end of the metering pump body (1). The buffer pipe (2) is connected to the outer periphery of the inlet pipe (101). A flow shaft (21) is installed inside the buffer pipe (2), and the flow shaft (21) divides the buffer pipe (2) into an inlet chamber and an outlet chamber. A through flow hole (211) is opened inside the flow shaft (21). The elastic sealing assembly (4) is installed in the liquid outlet chamber and blocks the flow passage (211). The end of the elastic sealing assembly (4) passes through the buffer tube (2) and is away from the end of the inlet tube (101). The tubular diversion assembly (3) is connected between the buffer tube (2) and the liquid outlet tube (102) and is in communication with the liquid outlet chamber. The sensing and warning assembly (5) is installed in the buffer tube (2) and is away from the inlet tube (101).

2. A metering pump with a buffer structure according to claim 1, characterized in that: The elastic sealing assembly (4) includes a sealing piston (41) and a rod-type elastic element (42). The rod-type elastic element (42) is installed in the liquid outlet chamber, and one end of the rod-type elastic element (42) slides through the buffer tube (2) away from the end of the liquid inlet tube (101). The sealing piston (41) is installed at the other end of the rod-type elastic element (42) and presses against the side of the flow shaft (21).

3. A metering pump with a buffer structure according to claim 2, characterized in that: The rod-type elastic element (42) includes an impact rod (421) and a first spring (422). The impact rod (421) is arranged laterally in the liquid outlet chamber. One end of the impact rod (421) slides through the buffer tube (2) away from the liquid inlet tube (101) and corresponds to the sensing and warning component (5). The sealing piston (41) is installed on the other end of the impact rod (421). The first spring (422) is sleeved on the impact rod (421), and the two ends of the first spring (422) are respectively connected to the sealing piston (41) and the inner wall of the buffer tube (2) away from the liquid inlet tube (101).

4. A metering pump with a buffer structure according to claim 3, characterized in that: The tubular diversion assembly (3) includes a diversion pipe (31) and a one-way component (32). The diversion pipe (31) is connected to the bottom of the buffer pipe (2) and communicates with the liquid outlet chamber. A number of one-way components (32) are arranged at intervals between the diversion pipe (31) and the liquid outlet pipe (102).

5. A metering pump with a buffer structure according to claim 4, characterized in that: The one-way component (32) includes a one-way tube (321), and a plurality of one-way tubes (321) are connected between the diversion tube (31) and the outlet tube (102). A one-way valve (322) is installed on the one-way tube (321).

6. A metering pump with a buffer structure according to claim 5, characterized in that: The sensing and warning assembly (5) includes an assembly cylinder (51), a second spring (52), a pressure sensor (53), and an alarm (54). The assembly cylinder (51) is mounted on the buffer tube (2) via an assembly rod (22), and the assembly cylinder (51) is located at the end of the buffer tube (2) away from the liquid inlet pipe (101). The second spring (52) is installed inside the assembly cylinder (51). The pressure sensor (53) is installed at one end of the second spring (52) and corresponds to the impact rod (421). The alarm (54) is installed at one end of the assembly cylinder (51), and the pressure sensor (53) and the alarm (54) are electrically connected.

7. A metering pump with a buffer structure according to claim 5, characterized in that: The buffer tube (2) is equipped with an elastic traction assembly (6) connected to the impact rod (421); The elastic traction assembly (6) includes a fixing ring (61) and an elastic traction rope (62). The fixing ring (61) is fixed at one end of the buffer tube (2) away from the liquid inlet tube (101). Several circumferentially arranged elastic traction ropes (62) are connected to the fixing ring (61), and the elastic traction ropes (62) are connected to the outer periphery of the impact rod (421).

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