Reciprocating pump flow regulating device

Abstract

The utility model discloses a reciprocating pump flow regulation and control device, include: water outlet pipe, water inlet pipe, backflow pipe, straight -through pipe, connecting pipe, manifold, butt joint pipe, pressure relief tank, water outlet pipe, water inlet pipe connect in the both ends of straight -through pipe, and one end of backflow pipe is closed, and the other end is connected in the side portion of water outlet pipe, and the both sides of straight -through pipe are installed with water inlet valve and water outlet valve respectively, and the one side of backflow pipe connection water outlet pipe is installed with backwater valve, and backflow pipe is located in the lower part of straight -through pipe, and multiple connecting pipes, manifold are connected between straight -through pipe, backflow pipe, and manifold is located in the both sides of connecting pipe, and the top of straight -through pipe is connected pressure relief tank through butt joint pipe, and butt joint pipe is provided with pressure relief valve, and the top of pressure relief tank is provided with the pressure relief pipe that communicates with the inside of pressure relief tank. The utility model can avoid the direct communication of water outlet pipe and water inlet end when bypass control flow, and avoid the mutual influence caused by the high pressure of both ends.

Description

Technical Field

[0001] This utility model belongs to the field of flow control technology, specifically a reciprocating pump flow control device. Background Technology

[0002] A pump room is a specialized facility for storing water pump equipment, primarily serving central or local water supply systems. The pump room not only protects the pump equipment and reduces noise during operation, but also facilitates maintenance and repair. Flow regulation methods for the pumps within the pump room mainly include adjusting the pump speed, regulating the opening of inlet and outlet valves, adjusting the impeller diameter or tilt angle, adjusting the pump's impulse or frequency, and bypass control.

[0003] The impulse or frequency regulation of the pump is for reciprocating pumps. Reciprocating pumps have high pressure and large pressure and flow pulsation. When the flow is directly regulated by bypass, the high pressure at the outlet end will impact the low pressure at the inlet end, which will aggravate the flow pulsation and easily cause the flow to be unstable. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a reciprocating pump flow control device that avoids direct connection between the outlet pipe and the inlet pipe when bypassing flow control, thus preventing mutual interference caused by different high and low pressures at both ends.

[0005] To solve the above problems, this utility model provides the following technical solution: The reciprocating pump flow control device includes: an outlet pipe, an inlet pipe, a return pipe, a straight pipe, a connecting pipe, a manifold, a coupling pipe, and a pressure relief tank. The outlet pipe and the inlet pipe are connected to both ends of the straight pipe. One end of the return pipe is closed, and the other end is connected to the side of the outlet pipe. An inlet valve and an outlet valve are installed on both sides of the straight pipe, and a return valve is installed on the side of the return pipe connected to the outlet pipe. The return pipe is located at the bottom of the straight pipe. Multiple connecting pipes and manifolds are connected between the straight pipe and the return pipe, and the manifolds are located on both sides of the connecting pipe. The top of the straight pipe is connected to the pressure relief tank through the coupling pipe, which is equipped with a pressure relief valve. The top of the pressure relief tank is equipped with a pressure relief pipe that communicates with the inside of the pressure relief tank.

[0006] Furthermore, a connecting pipe is welded to the middle of the upper part of the straight pipe, and the pressure relief pipe is welded to the pressure relief tank, thus connecting the pressure relief pipe to the inside of the pressure relief tank.

[0007] Furthermore, the pressure relief valve is connected to the connecting pipe via a flange, the connecting pipe and the pressure relief tank are connected via a flange, the inlet valve and outlet valve are connected to the straight pipe via flanges, and the return valve is connected to the return pipe via a flange.

[0008] Furthermore, the pressure relief valve, inlet valve, outlet valve, and return valve are all solenoid valves, with the return valve located below the inlet valve.

[0009] Furthermore, the inner diameter of the manifold is smaller than the inner diameter of the connecting pipe, the inner diameter of the connecting pipe is at least five times smaller than the inner diameter of the return pipe, and the inner diameter of the return pipe is equal to the inner diameter of the straight pipe.

[0010] Furthermore, multiple first straight pipe through holes are provided on both sides of the straight pipe, and multiple first return pipe through holes are provided on both sides of the return pipe. The two ends of the manifold are connected to the first straight pipe through holes and the first return pipe through holes, respectively.

[0011] Furthermore, a second straight pipe through hole is provided at the bottom of the straight pipe, and a second return pipe through hole is provided at the top of the return pipe. The two ends of the connecting pipe are respectively connected to the second straight pipe through hole and the second return pipe through hole.

[0012] Furthermore, the outlet pipe is connected to one side of the return pipe and the straight pipe, the inlet pipe is connected to one side of the straight pipe, and the connecting pipe is connected to the return pipe and the straight pipe.

[0013] This utility model has the following advantages compared with the prior art: 1. The reciprocating pump flow control device is equipped with a pressure relief tank and two valves on the straight pipe connecting the outlet pipe and the inlet pipe. When the liquid in the outlet pipe flows back to the inlet pipe through the straight pipe for bypass flow control, the pressure relief tank and valves form a temporary isolation for the backflowing water, avoiding direct connection between the outlet pipe and the inlet pipe, thereby avoiding mutual interference caused by the difference in high and low pressure at both ends.

[0014] 2. The reciprocating pump flow control device, by additionally configuring a return pipe and connecting it to the manifold using multiple small-diameter connecting pipes, can cause some of the water in the outlet pipe to flow back into the inlet pipe under limited water pressure reduction, thereby reducing the impact of water pressure fluctuations at the outlet.

[0015] 3. The reciprocating pump flow control device, through the cooperation of the pressure relief tank and the pressure relief pipe, can return more water at once, and at the same time has a good pressure relief and balancing effect for some liquids with high viscosity. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the reciprocating pump flow control device in this utility model; Figure 2 yes Figure 1 A schematic diagram of the cross-sectional structure; Figure 3 This is a schematic diagram showing the connection status of the return pipe and the straight pipe in this utility model; Figure 4 yes Figure 3 A schematic diagram of the cross-sectional structure. Detailed Implementation

[0017] The following description fully illustrates specific embodiments of the present invention to enable those skilled in the art to practice and reproduce it. To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0018] like Figure 1 The diagram shown is a structural schematic of the reciprocating pump flow control device of this utility model; as shown... Figure 2 As shown, is Figure 1 A schematic diagram of the cross-sectional structure; such as Figure 3 The diagram shown is a schematic representation of the connection status of the return pipe 3 and the straight pipe 4 in this utility model; as shown... Figure 4 As shown, is Figure 3 A schematic diagram of the cross-sectional structure.

[0019] The reciprocating pump flow control device includes: an outlet pipe 1, an inlet pipe 2, a return pipe 3, a straight pipe 4, a connecting pipe 5, a manifold 6, a connecting pipe 7, and a pressure relief tank 8. The outlet pipe 1 and the inlet pipe 2 are connected to both ends of the straight pipe 4. One end of the return pipe 3 is closed, and the other end is connected to the side of the outlet pipe 1. An inlet valve 41 and an outlet valve 42 are installed on both sides of the straight pipe 4, respectively. A return valve 31 is installed on the side of the return pipe 3 connected to the outlet pipe 1. The return pipe 3 is located at the lower part of the straight pipe 4. Multiple connecting pipes 5 and manifolds 6 are connected between the straight pipe 4 and the return pipe 3. The manifolds 6 are located on both sides of the connecting pipe 5. The top of the straight pipe 4 is connected to the pressure relief tank 8 through the connecting pipe 7. The connecting pipe 7 is equipped with a pressure relief valve 71. The top of the pressure relief tank 8 is equipped with a pressure relief pipe 81 that communicates with the inside of the pressure relief tank 8.

[0020] The connecting pipe 7 is welded to the middle position of the straight pipe 4. The pressure relief valve 71 is connected to the connecting pipe 7 through a flange. The connecting pipe 7 and the pressure relief tank 8 are connected through a flange. The pressure relief pipe 6, which communicates with the inside of the pressure relief tank 5, is welded and installed on the top of the pressure relief tank 5. The inlet valve 41 and the outlet valve 42 are connected to the straight pipe 4 through flanges. The return valve 31 is connected to the return pipe 3 through a flange.

[0021] The pressure relief valve 71, the inlet valve 41, the outlet valve 42, and the return valve 31 are all solenoid valves.

[0022] The inner diameter of manifold 6 is smaller than the inner diameter of connecting pipe 5. The inner diameter of connecting pipe 5 is at least five times smaller than the inner diameter of return pipe 3. The inner diameter of return pipe 3 is equal to the inner diameter of straight pipe 4.

[0023] Multiple first straight pipe through holes 43 are provided on both sides of the straight pipe 4, and multiple first return pipe through holes 32 are provided on both sides of the return pipe 3. The manifold 6 is connected to the first straight pipe through hole 43 and the first return pipe through hole 32 at both ends.

[0024] The bottom of the straight pipe 4 is provided with a second straight pipe through hole 44, the top of the return pipe 3 is provided with a second return pipe through hole 33, and the two ends of the connecting pipe 5 are respectively connected to the second straight pipe through hole 44 and the second return pipe through hole 33.

[0025] The outlet pipe 1 is connected to one side of the return pipe 3 and the straight pipe 4, and one side of the inlet pipe 2 is connected to the straight pipe 4. The connecting pipe 5 is connected to the return pipe 3 and the straight pipe 4. The return valve 31 is located below the inlet valve 41.

[0026] Before use, connect one end of the outlet pipe 1 and the inlet pipe 2 to the inlet and outlet of the reciprocating pump in the pump room, and connect the other end of the outlet pipe 1 and the inlet pipe 2 using the existing pipeline. During use, the return valve 31, the inlet valve 41, the outlet valve 42, and the pressure relief valve 71 are all kept closed. At this time, the outlet pipe 1 and the inlet pipe 2 can provide the maximum flow rate. When the flow rate needs to be reduced, first open the return valve 31. At this time, the outlet pipe 1 is connected to the return pipe 3 as the return valve 31 is opened. Some of the water in the outlet pipe 1 flows into the return pipe 3. Through the connecting pipe 5 and the manifold 6, the return pipe 3 and the straight pipe 4 are fixedly connected. Under the limitation of the small diameter of the connecting pipe 5 and the manifold 6, a limited flow rate enters the straight pipe 4. Due to the small diameter setting, the water flow will not quickly and in large quantities enter the straight pipe 4, and the water pressure reduction in the outlet pipe 1 is limited. After the set backflow time is reached, the return valve 31 closes; then the pressure relief valve 71 opens, and after a delay of 1-2 seconds, the outlet valve 42 opens. At this time, the water in the straight pipe 4 can re-enter the inlet pipe 2 through the opened outlet valve 42, which is equivalent to reducing the actual outflow of the outlet pipe 1, thus creating a flow reduction effect. At the same time, the backflow of water from the outlet pipe 1 and the inlet pipe 2 is interrupted by the valve through the straight pipe 4, avoiding the instability of the inlet water caused by the high pressure at the outlet end directly connecting to the low pressure at the inlet end. After the outflow time is reached, all valves close, and the return valve 31 opens again for the next backflow. When further flow reduction is needed, the return valve 31, outlet valve 42, and pressure relief valve 71 remain closed. The inlet valve 41 is opened, allowing water from outlet pipe 1 to enter straight pipe 4. After the set time is reached, the inlet valve 41 is closed, and the pressure relief valve 71 is opened. After a delay of 1-2 seconds, the outlet valve 42 is opened, allowing water from straight pipe 4 to enter inlet pipe 2. After the set out time is reached, all valves are closed, and the inlet valve 41 is reopened for the next return flow. Due to the large diameter of straight pipe 4, the return flow is greater, thus the flow reduction effect is more obvious. In addition, valves can be installed on each connecting pipe 5 or manifold 6. By controlling the number of valves opened, the return flow can be controlled more specifically, thereby controlling the actual output flow.

[0027] The terminology used in this invention is descriptive and exemplary, and not restrictive. Since this invention can be embodied in various forms without departing from the spirit or essence of the technical solution, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A reciprocating pump flow rate control device, characterized in that, include: The system includes an outlet pipe, an inlet pipe, a return pipe, a straight pipe, a connecting pipe, a manifold, a coupling pipe, and a pressure relief tank. The outlet and inlet pipes are connected to both ends of the straight pipe. One end of the return pipe is closed, and the other end is connected to the side of the outlet pipe. An inlet valve and an outlet valve are installed on both sides of the straight pipe, and a return valve is installed on the side of the return pipe connected to the outlet pipe. The return pipe is located at the bottom of the straight pipe. Multiple connecting pipes and manifolds are connected between the straight pipe and the return pipe. The manifolds are located on both sides of the connecting pipe. The top of the straight pipe is connected to the pressure relief tank through the coupling pipe, which is equipped with a pressure relief valve. The top of the pressure relief tank is equipped with a pressure relief pipe that communicates with the inside of the pressure relief tank.

2. The reciprocating pump flow control device as described in claim 1, characterized in that, The connecting pipe is welded to the middle of the upper part of the straight pipe, and the pressure relief pipe is welded to the pressure relief tank, and the pressure relief pipe is connected to the inside of the pressure relief tank.

3. The reciprocating pump flow control device as described in claim 1, characterized in that, The pressure relief valve is connected to the connecting pipe via a flange. The connecting pipe and the pressure relief tank are connected via flanges. The inlet valve and outlet valve are connected to the straight pipe via flanges. The return valve is connected to the return pipe via a flange.

4. The reciprocating pump flow control device as described in claim 1, characterized in that, The pressure relief valve, inlet valve, outlet valve, and return valve are all solenoid valves, with the return valve located below the inlet valve.

5. The reciprocating pump flow control device as described in claim 1, characterized in that, The inner diameter of the manifold is smaller than the inner diameter of the connecting pipe, the inner diameter of the connecting pipe is at least five times smaller than the inner diameter of the return pipe, and the inner diameter of the return pipe is equal to the inner diameter of the straight pipe.

6. The reciprocating pump flow control device as described in claim 1, characterized in that, Multiple first straight pipe through holes are provided on both sides of the straight pipe, and multiple first return pipe through holes are provided on both sides of the return pipe. The two ends of the manifold are connected to the first straight pipe through holes and the first return pipe through holes, respectively.

7. The reciprocating pump flow control device as described in claim 1, characterized in that, The bottom of the straight pipe is provided with a second straight pipe through hole, the top of the return pipe is provided with a second return pipe through hole, and the two ends of the connecting pipe are respectively connected to the second straight pipe through hole and the second return pipe through hole.

8. The reciprocating pump flow control device as described in claim 1, characterized in that, The outlet pipe is connected to one side of the return pipe and the straight pipe, the inlet pipe is connected to one side of the straight pipe, and the connecting pipe is connected to the return pipe and the straight pipe.

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