A flexible connected plunger pump

Abstract

The utility model discloses a flexible connection's plunger pump, including pump body, plunger rod, motor and and motor through the shaft coupling connection's screw rod, be equipped with the nut of screw rod between threaded connection with screw rod on the screw rod, and the nut top is equipped with nut connection guide seat, and the nut connection guide seat top is equipped with a recess, is equipped with plunger fixed connecting rod in the recess, and the plunger fixed connecting rod is connected with the recess two walls through the spring, and the other end of plunger fixed connecting rod is connected with plunger rod, the utility model technical scheme is not to plunger fixed connecting rod in radial direction completely limit, and the protection plunger rod, and the spring is inwards retraction and holds tightly to realize the connection in axial direction, can realize the quick installation and disassembly of whole pump body valve head subassembly.

Description

Technical Field

[0001] This utility model belongs to the field of plunger pump manufacturing, and more specifically, this utility model relates to a plunger pump with flexible connection. Background Technology

[0002] Currently, during high-pressure environment (above 40 MPa) operation tests, the plunger rod of the plunger pump is prone to breakage under radial force. In addition, the plunger rod may also cause motor stall due to failure of the optocoupler to trigger. Therefore, the plunger rod and its connection method and structure need to allow the plunger rod to float within a small range in the radial direction. It also needs to be able to detach from the pump body when subjected to excessive force to protect its own structure. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a flexible connection plunger pump.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a flexible connection plunger pump, including a pump body, a plunger rod, a motor, and a lead screw connected to the motor via a coupling. The lead screw is provided with a nut that is threadedly connected to the lead screw. The top of the nut is provided with a nut connection guide seat. The top of the nut connection guide seat is provided with a groove. A plunger fixing connection rod is provided in the groove. The plunger fixing connection rod is connected to the two walls of the groove by a spring. The other end of the plunger fixing connection rod is connected to the plunger rod.

[0005] This utility model discloses a flexible-connection plunger pump, wherein the bottom of the plunger fixed connecting rod is spherical.

[0006] This utility model discloses a flexible connection plunger pump, wherein the movable angle of the plunger fixing rod is 0-45°.

[0007] This utility model discloses a flexible piston pump, wherein the spring is a helical coil spring.

[0008] Compared with the prior art, the present invention has the following advantages:

[0009] This utility model's technical solution does not completely limit the piston fixing connecting rod in the radial direction, thus protecting the piston rod; in the axial direction, the connection is achieved by the spring contracting inward and clamping, which can realize the quick installation and disassembly of the entire pump body valve head assembly.

[0010] The present invention will be described in more detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0011] The following is a brief explanation of the contents of each of the accompanying drawings and the markings in the drawings:

[0012] Figure 1 This is a schematic diagram of the present invention;

[0013] Figure 2 This is a cross-sectional view (AA) of the present invention;

[0014] Figure 3 This is a partial enlarged view of the present invention;

[0015] The markings in the diagram are: 1. Motor; 2. Lead screw; 3. Nut; 4. Nut connecting guide seat; 5. Plunger fixing connecting rod; 6. Plunger rod; 7. Inclined coil spring. Detailed Implementation

[0016] The following description, with reference to the accompanying drawings, further details the specific implementation methods of this utility model, including the shape and structure of each component, the relative positions and connections between the parts, the function and working principle of each part, the manufacturing process, and the operation and use methods, so as to help those skilled in the art to have a more complete, accurate, and in-depth understanding of the utility model concept and technical solution.

[0017] like Figure 1 , Figure 2 and Figure 3 The illustrated flexible piston pump includes a pump body, a piston rod 6, a motor 1, and a lead screw 2 connected to the motor 1 via a coupling. The lead screw 2 is threadedly connected to a nut 3. The nut 3 has a nut connection guide seat 4 at its top, and a groove at its top. A piston fixing rod 5 is located within the groove, and the piston fixing rod 5 is connected to the two walls of the groove via a spring. The other end of the piston fixing rod 5 is connected to the piston rod 6. The bottom of the piston fixing rod 5 is spherical. The movable angle of the piston fixing rod 5 is 0-45°. The spring is a helical coil spring 7.

[0018] Working principle and method

[0019] Motor 1 drives lead screw 2 to rotate, thereby driving nut 3 and nut connecting guide 4 to move up and down. Nut connecting guide 4 and plunger fixed connecting rod 5 are connected by inclined coil spring 7. Plunger fixed connecting rod 5 moves up and down together with plunger rod 6 to realize the extraction and discharge of liquid.

[0020] The nut connecting guide seat 4 and plunger fixing connecting rod 5 are connected by a helical coil spring 7. In the radial direction, it is not fully limited to protect the plunger rod 6; in the axial direction, the spring contracts inward to tighten and achieve connection, which can realize the quick installation and disassembly of the entire valve head assembly.

[0021] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A flexible-connection plunger pump, comprising a pump body, a plunger rod, a motor, and a lead screw connected to the motor via a coupling, characterized in that, The lead screw is provided with a nut that is threadedly connected to the lead screw. The top of the nut is provided with a nut connection guide seat. The top of the nut connection guide seat is provided with a groove. A plunger fixing connection rod is provided in the groove. The plunger fixing connection rod is connected to the two walls of the groove by a spring. The other end of the plunger fixing connection rod is connected to the plunger rod.

2. The flexible-connection plunger pump according to claim 1, characterized in that, The bottom of the plunger fixing connecting rod is spherical.

3. The flexible-connection plunger pump according to claim 1, characterized in that, The movable angle of the plunger fixing rod is 0-45°.

4. The flexible-connection plunger pump according to claim 1, characterized in that, The spring is a helical coil spring.

Images