An intermediate tie rod

Abstract

The utility model relates to pump fit intermediate pull rod technical field especially, it relates to an intermediate pull rod, the intermediate pull rod includes the pole body, is equipped with the built -in cavity in the pole body, and the pole head of pole body is equipped with the threaded hole that opens with built -in cavity intercommunication, install steel ball and fill metal sand in built -in cavity, and install the sealing column for sealing built -in cavity in threaded hole, the utility model provides an intermediate pull rod, when the pole body bears the alternating load, the steel ball in the pole body can be to both sides metal sand under the action of inertial force, because metal sand can carry out plastic deformation and absorb vibration energy, therefore both sides metal sand will take place deformation when being impacted by steel ball, thereby the impact amplitude of steel ball is buffered, effectively reduces the internal stress that pole body bears the alternating load produces, improves the pole body service life and durability.

Description

Technical Field

[0001] This utility model relates to the field of pump intermediate tie rod technology, and in particular to an intermediate tie rod. Background Technology

[0002] The intermediate tie rod, also known as the connecting rod, is an important component connecting the crosshead and the piston rod. It is a key part connecting the power end and hydraulic end of the mud pump, playing a crucial role in transmitting alternating loads. One end is connected to the crosshead, and the other end is connected to the piston rod via a clamp. Traditional intermediate tie rods often use a solid or simple hollow structure, which is prone to fatigue fracture due to stress concentration when subjected to reciprocating tensile and compressive loads over a long period of time.

[0003] Therefore, it is necessary to provide a new intermediate tie rod to solve the above-mentioned technical problems. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides an intermediate tie rod.

[0005] The intermediate tie rod provided by this utility model includes a rod body, the rod body having an internal cavity, and the rod head of the rod body having a threaded hole communicating with the internal cavity.

[0006] The built-in cavity is equipped with steel balls and filled with metal sand, and a sealing post for sealing the built-in cavity is installed in the threaded hole.

[0007] Preferably, the steel ball is in rolling connection with the built-in cavity, and the steel ball is located in the middle of the built-in cavity, while the metal sand fills the built-in cavities on both sides of the steel ball.

[0008] Preferably, a nut is fixedly installed at the end of the sealing column, and the nut is threadedly connected to the threaded hole.

[0009] Preferably, the nut has a cross groove.

[0010] Preferably, the insertion end of the sealing column is fitted with a resiliently connected compression piston, and the compression piston is slidably connected to the built-in cavity and abuts against the metal sand.

[0011] Preferably, a spring is installed between the sealing column and the pressing piston. A rotating ring is fixedly installed at one end of the spring and is rotatably installed at the insertion end of the sealing column. The other end of the spring is fixedly connected to the pressing piston.

[0012] Compared with related technologies, the intermediate tie rod provided by this utility model has the following beneficial effects:

[0013] This utility model features a rod body with built-in steel balls and metal sand. By utilizing the synergistic effect of the inertial impact of the steel balls and the plastic deformation of the metal sand, the kinetic energy of the alternating load is converted into deformation energy, significantly reducing the stress inside the rod. The cross-groove nut facilitates disassembly, and with the elastic compression piston and spring, the metal sand can be adjusted or replaced periodically to maintain the buffering performance. The compression piston is slidably connected to the built-in cavity, and the metal sand is compacted by the spring preload to prevent sand particles from leaking out and extend the service life. Attached Figure Description

[0014] Figure 1 A schematic diagram of a preferred embodiment of the intermediate tie rod provided by this utility model;

[0015] Figure 2 for Figure 1 The diagram shows a cross-sectional view of the structure.

[0016] Figure 3 for Figure 2 A cross-sectional structural schematic diagram of the rod shown;

[0017] Figure 4 for Figure 2 The diagram shows the structure of the sealing column;

[0018] Figure 5 for Figure 4 The diagram shows a cross-sectional view of the sealing column.

[0019] The following are the labels in the diagram: 1. Rod body; 1a. Internal cavity; 1b. Threaded hole; 2. Sealing post; 21. Nut; 21a. Cross groove; 3. Steel ball; 4. Metal sand; 5. Press piston; 6. Spring. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0021] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0022] Example 1:

[0023] Please see Figures 1 to 5 The present invention provides an intermediate tie rod, which includes a rod body 1, a sealing column 2, a steel ball 3, and metal sand 4.

[0024] In the embodiments of this utility model, please refer to Figures 1 to 5The rod body 1 has an internal cavity 1a, and the rod head of the rod body 1 has a threaded hole 1b that communicates with the internal cavity 1a. The internal cavity 1a is equipped with steel balls 3 and filled with metal sand 4. The steel balls 3 are in rolling connection with the internal cavity 1a and are located in the middle of the internal cavity 1a. The metal sand 4 fills the internal cavities 1a on both sides of the steel balls 3. A sealing post 2 for sealing the internal cavity 1a is installed in the threaded hole 1b. A nut 21 is fixedly installed at the end of the sealing post 2 and is threadedly connected to the threaded hole 1b. A cross groove 21a is provided on the nut 21.

[0025] It should be noted that when installing steel ball 3 and metal sand 4, half of the metal sand 4 is first filled into the inner cavity 1a through the threaded hole 1b, then steel ball 3 is inserted, and the remaining metal sand 4 is filled into the inner cavity 1a. Finally, the sealing post 2 is inserted into the inner cavity 1a through the threaded hole 1b, and the nut 21 is driven to slide along the threaded hole 1b by a Phillips screwdriver, thereby pressing the steel ball 3 and metal sand 4 together.

[0026] It should also be noted that when the rod 1 is subjected to alternating loads (such as reciprocating tension and compression), the steel balls 3 inside the rod 1 can absorb vibration energy from the metal sand 4 on both sides under the action of inertial force. Therefore, the metal sand 4 on both sides will deform when impacted by the steel balls 3, thereby buffering the impact amplitude of the steel balls 3, effectively reducing the internal stress generated by the alternating loads (such as reciprocating tension and compression) on the rod 1, and improving the service life and durability of the rod 1.

[0027] Example 2:

[0028] Based on the above embodiment one, a spring 6 is added to the embodiment of this utility model. Please refer to [link / reference]. Figure 2 , Figure 4 and Figure 5 The sealing column 2 is installed with an elastically connected compression piston 5 at its insertion end. Specifically, a spring 6 is installed between the sealing column 2 and the compression piston 5. A rotating ring is fixedly installed at one end of the spring 6 and is rotatably installed at the insertion end of the sealing column 2. The other end of the spring 6 is fixedly connected to the compression piston 5, and the compression piston 5 is slidably connected to the internal cavity 1a and abuts against the metal sand 4.

[0029] It should be noted that when the nut 21 is fixed by sliding along the threaded hole 1b, the pressing piston 5 is driven by the spring force of the spring 6 to compact the metal sand 4. When the steel ball 3 continuously presses the metal sand 4 on both sides of the rod 1 under the alternating load (such as reciprocating motion), the spring 6 will also continuously extend and retract. Therefore, the metal sand 4, together with the resistance spring 5, further weakens the alternating load in the middle.

[0030] In this embodiment, the press-fit piston 5 can prevent the metal sand 4 from leaking out of the threaded hole 1b.

[0031] In this application, the rod body 1 contains steel balls 3 and metal sand 4. By utilizing the synergistic effect of the inertial impact of the steel balls 3 and the plastic deformation of the metal sand 4, the kinetic energy of the alternating load is converted into deformation energy, which greatly reduces the internal stress of the rod body 1. The nut 21 with the cross groove 21a is easy to disassemble. With the help of the elastic pressing piston 5 and the spring 6, the metal sand 4 can be adjusted or replaced periodically to maintain the buffering performance. The pressing piston 5 is slidably connected to the inner cavity 1a and the metal sand 4 is compacted by the pre-tightening force of the spring 6 to prevent sand particles from leaking out and extend the service life.

[0032] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A middle tie rod, characterized in that, It includes a rod body (1), the rod body (1) has an internal cavity (1a) and the rod head of the rod body (1) has a threaded hole (1b) that communicates with the internal cavity (1a); The built-in cavity (1a) is equipped with steel balls (3) and filled with metal sand (4), and a sealing post (2) for sealing the built-in cavity (1a) is installed in the threaded hole (1b).

2. The intermediate tie rod according to claim 1, characterized in that, The steel ball (3) is rolledly connected to the inner cavity (1a), and the steel ball (3) is located in the middle of the inner cavity (1a). The metal sand (4) fills the inner cavities (1a) on both sides of the steel ball (3).

3. The intermediate tie rod according to claim 1, characterized in that, The end of the sealing column (2) is fixedly installed with a nut (21), and the nut (21) is threadedly connected to the threaded hole (1b).

4. The intermediate tie rod according to claim 3, characterized in that, The nut (21) has a cross groove (21a).

5. The intermediate tie rod according to claim 1, characterized in that, The insertion end of the sealing column (2) is fitted with a press-fit piston (5) that is elastically connected, and the press-fit piston (5) is slidably connected to the inner cavity (1a) and abuts against the metal sand (4).

6. The intermediate tie rod according to claim 1, characterized in that, A spring (6) is installed between the sealing column (2) and the pressing piston (5). A rotating ring is fixedly installed at one end of the spring (6), and the rotating ring is rotatably installed at the insertion end of the sealing column (2). The other end of the spring (6) is fixedly connected to the pressing piston (5).

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