Socket type sealing joint for inserting drill rod with central pipe

Abstract

The utility model discloses a socket type sealing joint for inserting a drill rod with a central pipe. The socket type sealing joint consists of a first shell and a second shell, the first shell and the second shell are respectively provided with a first plugging end, a second plugging end, a first screwing end, a second screwing end, a first hexagonal head, a second hexagonal head, a first drainage surface and a second drainage surface; threads are arranged on the surfaces of the first screwing end and the second screwing end; the first hexagonal head and the second hexagonal head are half of a regular hexagon respectively. The first shell and the second shell can be spliced into a cylindrical socket type sealing joint; after splicing, threads on the surface of the screwing end form complete threads, the first hexagonal head and the second hexagonal head are spliced into a complete hexagonal head, and the first drainage face and the second drainage face form a complete inclined annular drainage face. After the screwing end and the inserting end of the socket type sealing joint are respectively inserted into the drill rod male head and the drill rod female head, the socket type sealing joint limits the shrinkage of a center hole of a sealing gasket at the drill rod joint, the flow volume of a drill rod at the joint is protected, and meanwhile, the sealing performance at the drill rod joint is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of a drill rod connection structure applied to a high-pressure rotary jet pile driver, in particular to a spigot-and-socket type sealing joint for plugging a drill rod with a central tube. Background Art

[0002] At present, high-pressure jet grouting piles are widely used in the field of engineering construction. The drill rods of the high-pressure jet grouting pile machine are generally connected through the male and female drill rods. The male drill rod is inserted into the female drill rod, and a ring-shaped sealing gasket with a flow hole in the center is inserted into the joint between the male and female drill rods for sealing. The high-pressure slurry flows from the male drill rod to the female drill rod through the flow hole. However, when the drill rod works vertically, it generally has a large pressure, which will cause the sealing gasket to be compressed, and then the flow hole in the center is compressed, the flow area is reduced, and the normal operation of the high-pressure jet grouting pile machine is affected. At the same time, in actual construction, although the joint between the male and female heads has a sealing gasket, it is still a weak point that is prone to high-pressure slurry seepage. Summary of the invention

[0003] The utility model aims to solve the deficiencies of the prior art and provide a spigot-and-socket sealing joint for plugging a drill rod with a central tube.

[0004] The utility model provides a spigot-and-socket sealing joint for plugging a central tube drill rod, comprising a first shell and a second shell. The first shell is characterized in that: the first shell is provided with a first plug end, a first screw end, a first hexagonal head, and a first drainage surface; the second shell is provided with a second plug end, a second screw end, a second hexagonal head, and a second drainage surface.

[0005] On the basis of the above, the first shell and the second shell can be spliced ​​into a complete hollow cylindrical socket-type sealing joint.

[0006] On the basis of the above, the surfaces of the first screwing end and the second screwing end are provided with threads, and can be screwed into the screw hole after splicing.

[0007] On the basis of the above, the first hexagonal head and the second hexagonal head can be spliced ​​into a complete hexagonal head for tightening the socket-type sealing joint with a wrench.

[0008] Compared with the prior art, the utility model has the following beneficial effects:

[0009] The utility model provides a spigot-and-socket sealing joint for plugging a drill pipe with a center tube. By providing a first and a second shell that can be spliced, and providing a thread on the surface of the screwed end, and providing a hexagonal head, the utility model has the characteristics of easy installation for a drill pipe with a center tube; by inserting the two ends of the spigot-and-socket sealing joint into the drill pipe male head and the drill pipe female head respectively, the compression of the center hole of the sealing gasket at the joint of the drill pipe male head and the drill pipe female head can be limited, the slurry flow at the drill pipe connection can be protected, and the sealing performance of the drill pipe connection can be further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0011] Figure 1 , Figure 2 It is a structural schematic diagram of a spigot-and-socket sealing joint for plugging a drill rod with a central tube according to the utility model;

[0012] Figure 3 This is a schematic diagram of the structure of the first shell of the utility model;

[0013] Figure 4 This is a schematic diagram of the structure of the first shell of the utility model;

[0014] Figure 5 The utility model is a schematic diagram of the installation of a spigot-and-socket sealing joint for splicing a drill rod with a central tube.

[0015] Description of Figure Numbers:

[0016] First shell 1, second shell 2, first screwing end 101, first hexagonal head 102, first plugging end 103, first drainage surface 104, second screwing end 201, second hexagonal head 202, second plugging end 203, second drainage surface 204, drill pipe male head 3, drill pipe female head 4, annular sealing ring 5, center tube 6.

[0017] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on 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.

[0019] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0020] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 The utility model comprises a first shell 1 and a second shell 2. The first shell 1 is provided with a first screwing end 101, a first hexagonal head 102, a first plugging end 103, and a first drainage surface 104; the second shell 2 is provided with a second screwing end 201, a second hexagonal head 202, a second plugging end 203, and a second drainage surface 204.

[0021] Reference Figure 1 The structure of the first embodiment of the present invention is as follows:

[0022] The connector is composed of a first shell 1 and a second shell 2. The first shell 1 is provided with a first screwing end 101, a first hexagonal head 102, a first plugging end 103, and a first drainage surface 104; the second shell 2 is provided with a second screwing end 201, a second hexagonal head 202, a second plugging end 203, and a second drainage surface 204; the first screwing end 101 and the second screwing end 201 are provided with threads on their surfaces; the first hexagonal head 102 and the second hexagonal head 202 are respectively half of a regular hexagon. After the first shell 1 and the second shell 2 are buckled together, a complete hollow cylindrical socket-type sealing joint can be formed; the threads on the surfaces of the first screwing end 101 and the second screwing end 201 form a complete annular thread; the first hexagonal head 102 and the second hexagonal head 202 form a complete hexagonal head; the first plugging end 103 and the second plugging end 203 form a complete cylindrical plugging end; the first drainage surface 104 and the second drainage surface 204 form an inclined annular drainage surface.

[0023] Reference Figure 1 , Figure 5 The installation method of the first embodiment of the present invention is as follows:

[0024] The first shell 1 and the second shell 2 are buckled onto the central tube 6 and combined into an integral socket-type sealing joint;

[0025] Use a wrench to screw the first screw-on end 101 and the second screw-on end 201 of the socket-type sealing joint into the drill pipe male head 3;

[0026] Insert the annular sealing gasket 5 into the drill pipe female head 4;

[0027] Insert the drill pipe male end 3 into the drill pipe female end 4, and the first plug end 103 and the second plug end 203 of the socket-type sealing joint are combined into a plug end that passes through the central flow hole of the annular sealing gasket 5 and is inserted into the flow pipe of the drill pipe female end 4 located at the rear of the sealing gasket.

[0028] At this time, the socket-type sealing joint limits the reduction of the center hole of the sealing gasket, protects the flow of the drill pipe at the joint, and at the same time, the deep connection between the drill pipe male head and the drill pipe female head through the socket-type sealing joint further improves the sealing performance of the drill pipe joint; the inclined annular drainage surface at the screwed end of the socket-type sealing joint can improve the flow state of the high-pressure slurry in the drill pipe at the connection.

Claims

1. A spigot-and-socket sealing joint for connecting a drill pipe with a central tube, characterized in that: It includes a first shell and a second shell. The first shell is provided with a first plug-in end, a first screw-on end, a first hexagonal head, and a first drainage surface. The second shell is provided with a second plug-in end, a second screw-on end, a second hexagonal head, and a second drainage surface.

2. A spigot-and-socket sealing joint for connecting a central tube drill pipe as claimed in claim 1, characterized in that: The first shell and the second shell can be spliced ​​into a complete hollow cylindrical socket-type sealing joint.

3. A spigot-and-socket sealing joint for connecting a central tube drill pipe as claimed in claim 1, characterized in that: The surfaces of the first screw-on end and the second screw-on end are provided with threads, and can be screwed into the screw hole after being spliced.

4. A spigot-and-socket sealing joint for connecting a central tube drill pipe as claimed in claim 1, characterized in that: The first hexagonal head and the second hexagonal head can be spliced ​​into a complete hexagonal head, which is used for tightening the socket-type sealing joint with a wrench.

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