A plunger pump with a built-in check valve

Abstract

The utility model relates to plunger pump technical field especially for a kind of plunger pump of built-in check valve, including pump body, the front end of the pump body is provided with liquid inlet end, the front end of the liquid inlet end is cooperatively docked with water inlet end, the upper end of the liquid inlet end is integrally provided with water outlet end, the inside of the liquid inlet end and water outlet end is provided with anti-return piece, liquid one-way delivery is realized by anti-return piece, the utility model is provided with anti-return piece in the water inlet cavity of liquid inlet end and the water outlet cavity inside water outlet end, realizes the direct integration of check valve and working cavity, effectively solves the problem of large size, high leakage risk of traditional external check valve and non-cavity mouth built-in check valve flow channel delay.

Description

Technical Field

[0001] This utility model relates to the field of plunger pump technology, specifically a plunger pump with a built-in check valve. Background Technology

[0002] As a type of positive displacement pump that relies on the reciprocating motion of the plunger within the pump body to change the volume of the working chamber to achieve liquid suction and discharge, the plunger pump is widely used in hydraulic transmission, petrochemical, engineering machinery, agricultural machinery, marine power and other fields due to its characteristics such as high pressure, convenient flow regulation and stable operation. It is a core power component in fluid transportation systems.

[0003] In the prior art, some plunger pumps do not integrate an anti-backflow structure inside the pump body in order to simplify the design or reduce costs. In order to achieve unidirectional liquid delivery, such plunger pumps need to connect a check valve in series in the external pipeline. The unidirectional conduction characteristic of the external check valve is used to prevent backflow. The working chamber is only connected to the external pipeline through the inlet and outlet ports. There are no unidirectional control elements inside the pump body. Some simple plunger pumps are not even equipped with any check valve. They rely entirely on the plunger movement speed or external load pressure difference to achieve approximate unidirectional delivery. However, in actual operation, they cannot effectively prevent liquid backflow.

[0004] Therefore, a piston pump with a built-in check valve is needed to improve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a plunger pump with a built-in one-way valve to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A plunger pump with a built-in one-way valve includes a pump body, a liquid inlet end provided at the front end of the pump body, a water inlet end connected to the front end of the liquid inlet end, and a water outlet end integrally provided at the upper end of the liquid inlet end. Both the liquid inlet end and the water outlet end are provided with anti-backflow components, and the liquid is transported in one direction through the anti-backflow components. The front side of the water outlet is provided with several water outlet connectors that communicate with its interior, and each water outlet connector is provided with a valve.

[0007] As a preferred embodiment of this utility model, the liquid inlet end is provided with a plurality of water inlet chambers, and the water outlet end is provided with a plurality of water outlet chambers that communicate with the water inlet chambers. The anti-backflow component includes a first anti-backflow component and a second anti-backflow component.

[0008] As a preferred embodiment of this utility model, the first anti-backflow component includes a plurality of one-way valves a that are limited and disposed inside the plurality of water inlet chambers, and the second anti-backflow component includes a plurality of one-way valves b that are limited and disposed inside the plurality of water outlet chambers.

[0009] As a preferred embodiment of this utility model, each of the water inlet chambers is provided with a plunger assembly, the pump body is provided with a shaft, the end of the shaft is connected to a drive component, and a number of cams are provided on the outside of the shaft. The cams are driven by the rotation of the shaft to abut against the plunger assemblies in sequence to achieve the action.

[0010] As a preferred embodiment of this utility model, a return water end is connected to one side of the upper end of the water outlet, and a regulating valve is installed at the upper end of the return water end.

[0011] As a preferred embodiment of this utility model, an air chamber is installed in the middle of the upper end of the water outlet, and a pressure gauge is installed on the other side of the upper end of the water outlet.

[0012] As a preferred embodiment of this utility model, the front end of the liquid inlet is fixedly connected to a docking end, the two ends of the water inlet are fixedly connected to the docking end by bolts, and a water inlet connector is provided in the middle of the front end of the water inlet.

[0013] As a preferred embodiment of this utility model, a set of mounting bases is provided at the lower end of the pump body.

[0014] Compared with the prior art, the beneficial effects of this utility model are: This invention achieves direct integration of the check valve and the working chamber by installing anti-backflow components inside the inlet chamber at the liquid inlet end and the outlet chamber at the liquid outlet end. This effectively solves the problems of large size, high leakage risk, and flow delay of traditional external check valves and non-cavity built-in check valves. The check valve directly responds to the pressure change of the working chamber, quickly opening to guide liquid in during the liquid suction stage and immediately closing to block backflow during the liquid discharge stage. This significantly improves the timeliness and reliability of unidirectional conduction, while simplifying external pipeline connections, reducing the overall size, and improving the integration and volumetric efficiency of the pump body. Attached Figure Description

[0015] Figure 1 This is a first-view perspective perspective view of the present invention; Figure 2 This is a second-view perspective perspective view of the present invention; Figure 3 This is a cross-sectional view of the present invention.

[0016] In the diagram: 1. Pump body; 2. Liquid inlet; 3. Connecting end; 4. Water inlet; 5. Water inlet connector; 6. Water outlet; 7. Water outlet connector; 8. Pressure gauge; 9. Air chamber; 10. Regulating valve; 11. Return water end; 12. Mounting base; 13. Water inlet chamber; 14. Check valve a; 15. Water outlet chamber; 16. Check valve b. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0018] To facilitate understanding of this utility model, a more comprehensive description of it will be provided below with reference to relevant embodiments. Several embodiments of this utility model are given. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0019] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0021] Please see Figure 1-3 This utility model provides a technical solution: For an example, please refer to... Figure 1 , 2 3. A plunger pump with a built-in one-way valve includes a pump body 1. A set of mounting seats 12 is provided at the lower end of the pump body 1. A liquid inlet end 2 is provided at the front end of the pump body 1. A water inlet end 4 is connected to the front end of the liquid inlet end 2. A water outlet end 6 is integrally provided at the upper end of the liquid inlet end 2. Both the liquid inlet end 2 and the water outlet end 6 are provided with anti-backflow components, which realize one-way liquid delivery. Several water outlet connectors 7 are provided on the front side of the water outlet end 6, which communicate with its interior, and each water outlet connector 7 is provided with a valve.

[0022] The pump body 1 serves as the basic structural element, with a shaft inside. The end of the shaft is connected to a drive component, and several cams are fixed to the outside of the shaft. When the drive component rotates the shaft, the cams rotate synchronously with the shaft. Through the periodic changes in the cam profile, a contact force is generated on the plunger assemblies in several water inlet chambers 13 in the liquid inlet end 2. When the cam protrusions contact the plunger assemblies, they push the plungers into the water inlet chambers 13. After the non-protruding part of the cam rotates away, the plunger assembly moves to the outside of the water inlet chamber 13 under the action of the reset force. Through the continuous rotation of the shaft, the cam cyclically abuts against each plunger assembly, realizing the continuous reciprocating motion of multiple sets of plungers, providing the power basis for liquid suction and discharge.

[0023] Please refer to Figure 1 , 2 The inlet end 2 has several inlet chambers 13, and the outlet end 6 has several outlet chambers 15 that communicate with the inlet chambers 13. The anti-backflow component includes a first anti-backflow component and a second anti-backflow component. The first anti-backflow component includes several one-way valves a14 that are limited and disposed inside the several inlet chambers 13. The second anti-backflow component includes several one-way valves b16 that are limited and disposed inside the several outlet chambers 15.

[0024] The liquid inlet 2 and the water outlet 6 are designed as an integrated unit. The liquid inlet 2 has several water inlet chambers 13 inside, and the water outlet 6 has several water outlet chambers 15 connected to the water inlet chambers 13 inside. The water inlet chamber 13 is equipped with a first anti-backflow component, and the water outlet chamber 15 is equipped with a second anti-backflow component. The two work together to achieve unidirectional liquid transport. When the non-protruding part of the cam rotates to the corresponding plunger assembly, the plunger moves to the outside of the water inlet chamber 13 under the action of the reset force, the volume of the water inlet chamber 13 increases instantaneously, and a negative pressure is formed inside. The one-way valve a14 opens, and the negative pressure in the water inlet chamber 13 directly acts on the one-way valve a14, which is limited inside the water inlet chamber 13, to overcome the valve disc resistance and open it. The external liquid enters through the water inlet connector 5 of the water inlet end 4, flows into the liquid inlet end 2 through the docking end 3 at the front end of the liquid inlet end 2, and then enters the water inlet chamber 13 through the opened one-way valve a14 to complete the liquid suction. The one-way valve a14 is built into and limited inside the water inlet chamber 13, that is, it is directly set at the opening of the water inlet chamber 13 where the liquid enters. It can quickly respond to changes in negative pressure, avoid the flow delay problem of traditional external one-way valves, and prevent the liquid from flowing back to the water inlet end 4 when the liquid is drawn. When the cam protrusion rotates to the corresponding plunger assembly, it pushes the plunger to move into the inlet chamber 13, reducing the volume of the inlet chamber 13 and creating positive pressure inside. At this time, the one-way valve a14 closes and the one-way valve b16 opens. Under the action of positive pressure, the valve disc of the one-way valve a14 is closed by pressure, and the liquid in the inlet chamber 13 is squeezed and enters the outlet chamber 15 through the internal flow channel. The one-way valve b16 in the outlet chamber 15 opens under the action of liquid pressure, and the liquid enters the outlet end 6 through the opened one-way valve b16, and is finally discharged through several outlet connectors 7 on the front side of the outlet end 6. Each outlet connector 7 is equipped with a valve, which can independently control the on / off of a single output. The one-way valve b16 is "limited inside the outlet chamber 15", that is, it is set at the cavity where the liquid enters the outlet end 6 from the inlet chamber 13, and can respond to the positive pressure change in real time to prevent the liquid from flowing back from the outlet end 6 to the inlet chamber 13, ensuring the one-way discharge.

[0025] Please refer to Figure 1 , 2 In pump body 1, each inlet chamber 13 is equipped with a plunger assembly, and the pump body 1 is equipped with a shaft. The end of the shaft is connected to a drive component, and several cams are provided on the outside of the shaft. The cams are driven by the rotation of the shaft to abut against several plunger assemblies in sequence to achieve the action. The upper end of the outlet 6 is connected to the return end 11, and the upper end of the return end 11 is equipped with a regulating valve 10. The upper middle part of the outlet 6 is equipped with an air chamber 9, and the other upper side of the outlet 6 is equipped with a pressure gauge 8. The front end of the liquid inlet 2 is fixedly connected to the docking end 3. The two ends of the inlet 4 are fixedly connected to the docking end 3 by bolts, and the front middle part of the inlet 4 is equipped with an inlet connector 5.

[0026] Both the liquid inlet end 2 and the water outlet end 6 are provided with several water inlet chambers 13 and several water outlet chambers 15. When the shaft rotates, the cam drives each plunger assembly to alternately perform the liquid suction / discharge stroke. When one group of plungers is in the liquid suction stage, another group of plungers is in the liquid discharge stage. Through the coordinated action of multiple groups, the continuous and stable output of liquid is achieved, avoiding the flow pulsation problem of single plunger pump and improving the overall output uniformity.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A plunger pump with a built-in one-way valve, comprising a pump body (1), wherein the pump body (1) has an inlet end (2) at its front end, and a water inlet end (4) is fitted to the front end of the inlet end (2), and a water outlet end (6) is integrally provided at the upper end of the inlet end (2), characterized in that: Both the liquid inlet (2) and the water outlet (6) are equipped with anti-backflow components, which enable unidirectional liquid transport. The front side of the water outlet (6) is provided with several water outlet connectors (7) that communicate with its interior, and each water outlet connector (7) is provided with a valve.

2. The plunger pump with a built-in one-way valve according to claim 1, characterized in that: The liquid inlet end (2) has several water inlet chambers (13) inside, and the water outlet end (6) has several water outlet chambers (15) inside that communicate with the water inlet chambers (13). The anti-backflow component includes a first anti-backflow component and a second anti-backflow component.

3. The plunger pump with a built-in one-way valve according to claim 2, characterized in that: The first anti-backflow component includes several one-way valves a (14) that are limited inside several of the water inlet chambers (13), and the second anti-backflow component includes several one-way valves b (16) that are limited inside several of the water outlet chambers (15).

4. The plunger pump with a built-in one-way valve according to claim 3, characterized in that: Each of the water inlet chambers (13) is equipped with a plunger assembly, and the pump body (1) is equipped with a shaft. The end of the shaft is connected to a drive component, and several cams are provided on the outside of the shaft. The cams abut against several plunger assemblies in sequence under the rotation of the shaft to achieve the action.

5. The plunger pump with a built-in one-way valve according to claim 4, characterized in that: The upper end of the outlet (6) is connected to the return end (11), and the upper end of the return end (11) is equipped with a regulating valve (10).

6. The plunger pump with a built-in one-way valve according to claim 5, characterized in that: An air chamber (9) is installed in the middle of the upper end of the water outlet (6), and a pressure gauge (8) is installed on the other side of the upper end of the water outlet (6).

7. The plunger pump with a built-in check valve according to any one of claims 1-6, characterized in that: The front end of the liquid inlet (2) is fixedly connected to the docking end (3), and the two ends of the water inlet (4) are fixedly connected to the docking end (3) by bolts. The water inlet (4) is provided with a water inlet connector (5) in the middle of the front end.

8. The plunger pump with a built-in one-way valve according to claim 7, characterized in that: A set of mounting bases (12) is provided at the lower end of the pump body (1).

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