Mud pump middle pull rod with protection structure

Abstract

The utility model relates to the technical field of slurry pump middle pull rods, in particular to a slurry pump middle pull rod with a protection structure, which comprises a middle pull rod, threads are arranged at two ends of the middle pull rod, protection caps are arranged at two ends of the middle pull rod, threads are arranged on the inner walls of the protection caps, and an upper flat plate is arranged at the top end of each protection cap. An upper screw hole is formed in the surface of the upper flat plate, a lower flat plate is arranged at the bottom end of the protective cap, and a lower screw hole is formed in the surface of the lower flat plate; the middle pull rod conveying device has the beneficial effects that when a plurality of groups of middle pull rods are conveyed in batches, the two ends of the middle pull rods are connected and provided with the protective caps through threads, the protective caps directly protect the threads of the middle pull rods, meanwhile, after the groups of middle pull rods are stacked together, the groups of middle pull rods are stacked to form a pile and then put down, and the conveying efficiency is improved. After multiple stacks of middle pull rods are formed, the multiple stacks of middle pull rods are stacked to finally form a matrix, and therefore the multiple sets of middle pull rods can be prevented from colliding with one another, and the protection effect on the middle pull rods is achieved.

Description

Technical Field

[0001] The utility model relates to the field of a middle pull rod of a mud pump, in particular to a middle pull rod of a mud pump with a protection structure. Background Art

[0002] The intermediate rod of the mud pump, also known as the intermediate rod, is a key part in the mud pump. It is located at the boundary between the power end and the hydraulic end. Its main function is to transmit power to the hydraulic end. It is an important component connecting the crosshead and the piston rod.

[0003] In the prior art, the middle pull rod of the mud pump is a round rod structure, and threads are provided at both ends thereof, and the piston rod and the cross head can be conveniently connected through threaded connection.

[0004] However, the middle tie rod of the mud pump in the prior art lacks a protective structure. When the middle tie rods are transported in batches, the round rod-shaped middle tie rods of the mud pump are easy to roll around and collide with each other, which poses a risk of collision and wear on the threads, resulting in the mud pump being unable to be installed smoothly when it arrives at the site. Utility Model Content

[0005] The utility model aims to provide a mud pump intermediate pull rod with a protection structure to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a middle pull rod of a mud pump with a protective structure, comprising: a middle pull rod, both ends of which are provided with threads, both ends of the middle pull rod are provided with protective caps, the inner wall of the protective cap is provided with threads, the top of the protective cap is provided with an upper plate, the surface of the upper plate is provided with upper screw holes, the bottom end of the protective cap is provided with a lower plate, the surface of the lower plate is provided with lower screw holes.

[0007] Preferably, the intermediate pull rods are arranged in several groups, wherein one group of intermediate pull rods is arranged above another group of intermediate pull rods, and the same group of screws are screwed into the lower screw holes arranged on the surface of one group of intermediate pull rods and the upper screw holes arranged on the surface of the other group of intermediate pull rods.

[0008] Preferably, a push rod mounting groove is opened on the surface of the intermediate pull rod, and several groups of push rod mounting grooves are arranged. One end of the push rod is movably connected in the push rod mounting groove. Several groups of push rods are arranged, and the same group of gaskets are fixed to one end of the push rod mounting groove, and the other end of the gasket rests on the surface of the protective cap.

[0009] Preferably, a plurality of groups of grooves are formed on the surface of one end of the gasket close to the protective cap, and the plurality of groups of grooves are evenly distributed on the surface of the gasket.

[0010] Preferably, a spring is fixed to one end of the tappet extending into the tappet mounting groove, and the other end of the spring is fixed to the inner wall of the tappet mounting groove, and the spring is in a compressed state.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The utility model provides a mud pump intermediate tie rod with a protective structure. When a plurality of groups of intermediate tie rods are transported in batches, protective caps are installed on both ends of the intermediate tie rods through threaded connection. The protective caps directly protect the threads of the intermediate tie rods. At the same time, after the groups of intermediate tie rods are stacked together, the lower screw holes on the surfaces of the upper intermediate tie rods and the upper screw holes on the surfaces of the lower intermediate tie rods are connected through screws, so that the lower plate on the surface of the upper intermediate tie rods and the upper plate on the surface of the lower intermediate tie rods are limited together. Therefore, a plurality of groups of intermediate tie rods are stacked up to form a pile and then laid down. After forming a plurality of piles, the plurality of piles of intermediate tie rods are stacked to finally form a matrix. This can prevent the plurality of groups of intermediate tie rods from colliding with each other, thereby protecting the intermediate tie rods. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model;

[0015] Figure 3 for Figure 2 A schematic diagram of the enlarged structure in the middle.

[0016] In the figure: middle tie rod 1, protective cap 2, tappet mounting groove 3, spring 4, tappet 5, gasket 6, groove 7, upper plate 8, upper screw hole 9, lower plate 10, lower screw hole 11. DETAILED DESCRIPTION

[0017] In order to make the purpose and technical solution of the utility model clearly and completely described, and the advantages more clearly understood, the embodiments of the utility model are further described in detail in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are part of the embodiments of the utility model, not all of the embodiments, and are only used to explain the embodiments of the utility model, and are not used to limit the embodiments of the utility model. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] Embodiment 1

[0019] See also Figure 1-Figure 3The utility model provides a technical solution: an intermediate pull rod of a mud pump with a protective structure, comprising: an intermediate pull rod 1, threads are provided at both ends of the intermediate pull rod 1, protective caps 2 are provided at both ends of the intermediate pull rod 1, threads are provided on the inner wall of the protective cap 2, an upper plate 8 is provided at the top of the protective cap 2, upper screw holes 9 are provided on the surface of the upper plate 8, a lower plate 10 is provided at the bottom end of the protective cap 2, lower screw holes 11 are provided on the surface of the lower plate 10, several groups of intermediate pull rods 1 are provided, one group of intermediate pull rods 1 is provided above another group of intermediate pull rods 1, and the same group of screws are screwed in the lower screw holes 11 provided on the surface of one group of intermediate pull rods 1 and the upper screw holes 9 provided on the surface of the other group of intermediate pull rods 1.

[0020] In actual use, when transporting several groups of intermediate tie rods 1 in batches, the two ends of the intermediate tie rods 1 are installed with protective caps 2 through threaded connections. The protective caps 2 directly protect the threads of the intermediate tie rods 1. At the same time, after stacking each group of intermediate tie rods 1 together, the lower screw hole 11 on the surface of the upper intermediate tie rod 1 is connected with the upper screw hole 9 on the surface of the lower intermediate tie rod 1 through screws, so that the lower plate 10 on the surface of the upper intermediate tie rod 1 and the upper plate 8 on the surface of the lower intermediate tie rod 1 are limited together, so that several groups of intermediate tie rods 1 are stacked up to form a stack and then laid down. After forming multiple stacks, the multiple stacks of intermediate tie rods 1 are stacked to finally form a matrix, which can prevent several groups of intermediate tie rods 1 from colliding with each other and protect the intermediate tie rods 1.

[0021] Embodiment 2

[0022] On the basis of embodiment 1, in order to prevent the protective cap 2 from loosening, a push rod mounting groove 3 is opened on the surface of the middle pull rod 1, and the push rod mounting groove 3 is arranged in several groups. One end of the push rod 5 is movably connected in the push rod mounting groove 3, and the push rod 5 is arranged in several groups. The same group of gaskets 6 are fixed to one end of the push rod mounting groove 3 extending out of the push rod mounting groove 3, and the other end of the gasket 6 is against the surface of the protective cap 2.

[0023] After the protective cap 2 is tightened on the end of the intermediate tie rod 1 through a threaded connection, the gasket 6 is pressed against the surface of the intermediate tie rod 1, and one end of the push rod 5 extends into the push rod mounting groove 3 to prevent the gasket 6 from rotating, thereby generating friction between the gasket 6 and the protective cap 2. The friction prevents the protective cap 2 from rotating, thereby preventing the protective cap 2 from loosening.

[0024] Embodiment 3

[0025] On the basis of the second embodiment, in order to increase the friction between the gasket 6 and the protective cap 2 , a plurality of groups of grooves 7 are formed on the surface of one end of the gasket 6 close to the protective cap 2 , and the plurality of groups of grooves 7 are evenly distributed on the surface of the gasket 6 .

[0026] The surface of the gasket 6 is provided with a plurality of grooves 7, so that the surface of the gasket 6 is very rough, thereby increasing the friction coefficient of the gasket 6. The friction force between the gasket 6 and the protective cap 2 is increased through the friction force formula: friction force = pressure × friction coefficient.

[0027] Embodiment 4

[0028] On the basis of the third embodiment, in order to further increase the friction between the gasket 6 and the protective cap 2, a spring 4 is fixed to one end of the push rod 5 extending into the push rod mounting groove 3, and the other end of the spring 4 is fixed to the inner wall of the push rod mounting groove 3, and the spring 4 is in a compressed state.

[0029] After the push rod 5 is completely retracted into the push rod mounting groove 3, the spring 4 is compressed, so that the spring 4 generates a thrust on the push rod 5. The thrust of the spring 4 on the push rod 5 is transmitted to the gasket 6, thereby increasing the pressure between the gasket 6 and the protective cap 2. Through the friction formula: friction force = pressure × friction coefficient, the friction force is further increased.

[0030] In actual use, when transporting several groups of intermediate tie rods 1 in batches, the two ends of the intermediate tie rods 1 are installed with protective caps 2 through threaded connections. The protective caps 2 directly protect the threads of the intermediate tie rods 1. At the same time, after stacking the groups of intermediate tie rods 1 together, the lower screw holes 11 on the surface of the upper intermediate tie rod 1 are connected with the upper screw holes 9 on the surface of the lower intermediate tie rod 1 through screws, so that the lower plate 10 on the surface of the upper intermediate tie rod 1 and the upper plate 8 on the surface of the lower intermediate tie rod 1 are limited together, so that several groups of intermediate tie rods 1 are stacked up to form a stack and then laid down. After forming multiple stacks, the multiple stacks of intermediate tie rods 1 are stacked to finally form a matrix, which can prevent several groups of intermediate tie rods 1 from colliding with each other and protect the intermediate tie rods 1. After the protective caps 2 are tightened on the ends of the intermediate tie rods 1 through threaded connections, , the gasket 6 is pressed against the surface of the middle pull rod 1, and one end of the push rod 5 extends into the push rod mounting groove 3 to prevent the gasket 6 from rotating, thereby generating friction between the gasket 6 and the protective cap 2, and the friction prevents the protective cap 2 from rotating, thereby preventing the protective cap 2 from loosening; a plurality of groups of grooves 7 are provided on the surface of the gasket 6, so that the surface of the gasket 6 is very rough, so that the friction coefficient of the gasket 6 is increased, and the friction between the gasket 6 and the protective cap 2 is increased through the friction formula: friction = pressure × friction coefficient; after the push rod 5 is completely retracted into the push rod mounting groove 3, the spring 4 is compressed, so that the spring 4 generates a thrust on the push rod 5, and the thrust of the spring 4 on the push rod 5 is transmitted to the gasket 6, thereby increasing the pressure between the gasket 6 and the protective cap 2, and the friction formula: friction = pressure × friction coefficient is used to further increase the friction.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mud pump intermediate pull rod with a protective structure, comprising: An intermediate pull rod (1) is provided with threads at both ends of the intermediate pull rod (1), and is characterized in that: protective caps (2) are provided at both ends of the intermediate pull rod (1), threads are provided on the inner wall of the protective cap (2), an upper plate (8) is provided at the top end of the protective cap (2), an upper screw hole (9) is provided on the surface of the upper plate (8), and a lower plate (10) is provided at the bottom end of the protective cap (2), and a lower screw hole (11) is provided on the surface of the lower plate (10).

2. The intermediate pull rod of a mud pump with a protective structure according to claim 1, characterized in that: The intermediate pull rods (1) are provided in a plurality of groups, wherein one group of intermediate pull rods (1) is provided above another group of intermediate pull rods (1), and the same group of screws are screwed into the lower screw holes (11) provided on the surface of one group of intermediate pull rods (1) and the upper screw holes (9) provided on the surface of the other group of intermediate pull rods (1).

3. The intermediate pull rod of a mud pump with a protective structure according to claim 1, characterized in that: A push rod installation groove (3) is provided on the surface of the intermediate pull rod (1), and the push rod installation groove (3) is provided in a plurality of groups. One end of a push rod (5) is movably connected in the push rod installation groove (3), and the push rod (5) is provided in a plurality of groups. One end of the push rod (5) extending out of the push rod installation groove (3) is fixed with the same group of gaskets (6), and the other end of the gasket (6) is against the surface of the protective cap (2).

4. The intermediate pull rod of a mud pump with a protective structure according to claim 3, characterized in that: A plurality of groups of grooves (7) are formed on the surface of one end of the gasket (6) close to the protective cap (2), and the plurality of groups of grooves (7) are evenly distributed on the surface of the gasket (6).

5. The intermediate pull rod of a mud pump with a protective structure according to claim 3, characterized in that: A spring (4) is fixed to one end of the push rod (5) extending into the push rod installation groove (3), and the other end of the spring (4) is fixed to the inner wall of the push rod installation groove (3). The spring (4) is in a compressed state.

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