An ultra-high pressure metal seal bushing head with self-locking function

Abstract

The application discloses a kind of superhigh pressure metal sealing casing head with self-locking function in the technical field of casing head, including casing body, installation through opening is set in casing body inside;The application in the process of oil drilling, using extrusion ring and sliding groove, when the pressure in installation pipe increases, the upper end of extrusion ring is extruded using sliding groove, so that extrusion ring can increase the clamping force of installation pipe, ensure that installation pipe can be stably clamped by extrusion ring when the pressure in installation pipe is high, avoid the process that installation pipe is used for a long time, high-pressure liquid in installation pipe and installation through opening can cause installation pipe to loosen, so that installation pipe and casing body are damaged, and using fastening block, during the process of conveying after the pressure in installation pipe increases, the ejector rod can be pulled to one side and kept stable under the action of fastening block, avoid the process that installation pipe is conveyed, installation pipe will shake and cause the ejector rod to loosen.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of casing head, in particular to a super-high pressure metal sealing casing head with self-locking function. BACKGROUND

[0002] The casing head is used to fix the wellhead of drilling well, connect the wellhead casing column, support the gravity of the technical casing and the oil layer casing, seal the annular space between the layers, provide transition connection for the blowout preventer, tubing head and Christmas tree, and through two side openings on the casing head body, mud supplement, monitoring and balance liquid injection can be carried out. The casing column is an important part of natural gas exploration and development, and plays an important role in the construction of underground gas storage well. The casing column is a high-pressure container connected by a plurality of casings, and the threaded connection between the adjacent two casings is the casing joint.

[0003] In the process of oil drilling, the casing head is usually installed on the wellhead, and then the conveying pipe is connected with the casing head. The casing head can fix and seal the conveying pipe. However, in the process of drilling, the pressure in the conveying pipe is high, and vibration will occur between the conveying pipe and the casing head due to high pressure during conveying. After a long time of work, a gap will be generated between the conveying pipe and the casing head, which will cause damage to the casing head and the conveying pipe. SUMMARY

[0004] The present application aims to provide a super-high pressure metal sealing casing head with self-locking function to solve the problems in the background.

[0005] To achieve the above purpose, the present application provides the following technical scheme: a super-high pressure metal sealing casing head with self-locking function, comprising a casing body, an installation opening, a flat valve, a pressure gauge, a sealing groove and an installation pipe are arranged on the casing body, a limiting mechanism is arranged on the surface of the casing body, the limiting mechanism is used for limiting the installation pipe, a sealing mechanism is arranged on the surface of the installation pipe, the sealing mechanism is used for sealing between the installation pipe and the casing body, an automatic clamping mechanism is arranged in the casing body, the automatic clamping mechanism is used for clamping the installation pipe when the internal pressure of the casing body increases after the installation pipe is installed and delivered, a positioning mechanism is arranged on the surface of the automatic clamping mechanism, the positioning mechanism is used for limiting the position of the automatic clamping mechanism and the installation pipe, a fastening mechanism is arranged between the automatic clamping mechanism and the limiting mechanism, the fastening mechanism is used for fastening the limiting mechanism when the automatic clamping mechanism clamps the installation pipe.

[0006] As a further scheme of the present application, the limiting mechanism comprises an annular limiting groove, which is arranged on the surface of the mounting pipe, a plurality of threaded holes are arranged on the surface of the sleeve body, and a plurality of top rods are threadedly connected in the threaded holes, and the end of the top rod is located in the limiting groove.

[0007] As a further scheme of the present application, the sealing mechanism comprises an annular fixing strip, which is fixedly connected to the surface of the mounting pipe, and two annular grooves are arranged on the surface of the fixing strip, and a sealing ring is arranged in the annular groove.

[0008] As a further scheme of the present application, the automatic clamping mechanism comprises an annular sliding groove, which is arranged on the inner wall surface of the mounting opening, the top of the sliding groove is beveled, and a pressing ring is slidably connected in the sliding groove, the upper end of the pressing ring is beveled, and the sealing ring is attached to the inner side of the pressing ring.

[0009] As a further scheme of the present application, the positioning mechanism comprises an annular positioning groove, which is arranged on the surface of the mounting pipe, and a positioning strip is fixedly connected to the inner side surface of the pressing ring, and the upper end of the positioning strip is beveled.

[0010] As a further scheme of the present application, the fastening mechanism comprises a plurality of hole expansions, which are respectively arranged on the inner side of the threaded hole close to the mounting opening, a fastening block is elastically and slidably connected in the hole expansion, the side away from the mounting opening of the fastening block is conical, the top rod penetrates through the fastening block and is threadedly connected with the fastening block, an extension groove is arranged on the inner wall bottom of the hole expansion, the extension groove extends downward and communicates with the sliding groove, a fastening plate is elastically and slidably connected in the extension groove, the upper end of the fastening plate is arc-shaped, the upper end of the fastening plate is attached to the end surface of the fastening block, a telescopic pushing block is fixedly connected to the surface of the pressing ring, and the pushing block is located below the fastening plate.

[0011] As a further scheme of the present application, a plurality of inclined communication holes are arranged on the bottom of the sliding groove, and the communication holes communicate with the mounting opening.

[0012] As a further scheme of the present application, a plurality of arc-shaped grooves are arranged on the inner wall surface of the mounting opening at equal angles, the inner wall of the arc-shaped groove is beveled, a plurality of positioning blocks are slidably connected in the arc-shaped grooves, a through hole is arranged on the surface of the positioning block, and the through hole is located below the communication hole.

[0013] As a further scheme of the present application, a plurality of extrusion grooves are arranged on the upper end surface of the pressing ring at equal angles, and the bottom of the mounting pipe is beveled.

[0014] As a further scheme of the present application, a recess is arranged on the inner wall away from the mounting opening of the sliding groove.

[0015] Compared with the prior art, the present application has the beneficial effects that:

[0016] 1. The present application utilizes the extrusion ring and the sliding groove to extrude the upper end of the extrusion ring when the pressure in the installation pipe increases, so that the extrusion ring can increase the clamping force on the installation pipe, ensuring that the installation pipe can be stably clamped by the extrusion ring when the pressure in the installation pipe is high, avoiding the loosening of the installation pipe caused by the high-pressure liquid in the installation port, which can damage the installation pipe and the casing body, and the use of the fastening block can keep the ejector rod stable under the action of the fastening block during transportation after the internal pressure of the installation pipe increases, avoiding the loosening of the ejector rod caused by the shaking of the installation pipe during transportation, which affects the positioning of the ejector rod on the installation pipe.

[0017] 2. During the transportation of the installation pipe, the pressure in the installation port and the installation pipe will increase, the pressure in the installation port will act on the bottom of the extrusion ring through the communication hole, and the extrusion ring will move upward under the action of the pressure in the installation port, which can increase the upward force of the extrusion ring when the pressure in the installation port increases, ensuring that the extrusion ring can quickly clamp the installation pipe after the pressure in the installation port increases.

[0018] 3. When the installation pipe is moved into the installation port, the installation pipe will move between the plurality of positioning blocks, which can keep the installation pipe in the middle position of the installation port, and the positioning blocks can keep the installation pipe stable, and when the pressure in the installation port increases during subsequent use of the installation pipe, the liquid in the installation pipe will act on the positioning blocks to move upward in the arc-shaped groove, the upward movement of the positioning blocks will move the installation pipe to the side of the installation pipe under the action of the arc-shaped groove, which can extrude and clamp the installation pipe, keeping the installation pipe stable during transportation and reducing the vibration of the installation pipe during work. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a schematic view of the overall structure of the present application;

[0020] Figure 2 is a schematic view of the overall structure of the present application after being cut open;

[0021] Figure 3 is Figure 2 is a schematic view of the structure at point A in the present application;

[0022] Figure 4 is Figure 2 is a schematic view of the structure at point B in the present application;

[0023] Figure 5It is a structure schematic diagram of the sleeve body and the installation pipe after being cut open in the application;

[0024] Figure 6 It is a structure schematic diagram of the inside of the sleeve body and the automatic clamping mechanism in the application;

[0025] Figure 7 It is a structure schematic diagram of the inside of the sleeve body and the automatic clamping mechanism in the application; Figure 6 It is a structure schematic diagram of the inside of the sleeve body and the automatic clamping mechanism in the application;

[0026] Figure 8 It is a structure schematic diagram of the inside of the sleeve body and the automatic clamping mechanism in the application; Figure 6 It is a structure schematic diagram of the inside of the sleeve body and the automatic clamping mechanism in the application;

[0027] Figure 9 It is a structure schematic diagram of the inside of the sleeve body and the automatic clamping mechanism in the application; Figure 6 It is a structure schematic diagram of the inside of the sleeve body and the automatic clamping mechanism in the application;

[0028] Figure 10 It is a structure schematic diagram of the sleeve body after being cut open in the application;

[0029] Figure 11 It is a structure schematic diagram of the inside of the sleeve body and the automatic clamping mechanism in the application; Figure 10 It is a structure schematic diagram of the inside of the sleeve body and the automatic clamping mechanism in the application;

[0030] Figure 12 It is a structure schematic diagram of the inside of the sleeve body and the automatic clamping mechanism in the application; Figure 10 It is a structure schematic diagram of the inside of the sleeve body and the automatic clamping mechanism in the application;

[0031] Figure 13 It is a structure schematic diagram of the installation pipe in the application.

[0032] In the drawings, the components represented by each reference numeral are listed as follows:

[0033] 1-sleeve body, 2-installation opening, 3-flat valve, 4-pressure gauge, 5-sealing groove, 6-installation pipe, 7-limiting groove, 8-thread hole, 9-jacking rod, 10-fixing strip, 11-annular groove, 12-sealing ring, 13-sliding groove, 14-extrusion ring, 15-positioning groove, 16-positioning strip, 17-enlarged hole, 18-fastening block, 19-extended groove, 20-fastening plate, 21-pushing block, 22-communication hole, 23-arc-shaped groove, 24-positioning block, 25-through hole, 26-extrusion slot, 27-clearance groove. DETAILED DESCRIPTION

[0034] The embodiments of the present application will be described in detail by specific examples. Those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in the specification. The present application can also be implemented or applied by different specific embodiments, and the details in the specification can be modified or changed based on different views and applications without departing from the spirit of the present application. It should be noted that the following examples and features in the examples can be combined with each other without conflict.

[0035] It should be noted that the drawings provided in the following embodiments only illustrate the basic concept of the present application in a schematic manner, and only the components related to the present application are shown in the drawings, not the number, shape and size of the components when actually implemented. The actual implementation of each component may be a random change, and the component layout may be more complex.

[0036] Please refer to Figures 1-13 The present application provides a technical solution: a self-locking ultra-high pressure metal sealing sleeve head, comprising a sleeve body 1, an installation opening 2 is formed in the inside of the sleeve body 1, flat valves 3 are communicated with the left and right sides of the surface of the sleeve body 1, a pressure gauge 4 is communicated with the surface of the rightmost flat valve 3, a plurality of sealing grooves 5 are arranged in the inside of the sleeve body 1, an installation pipe 6 is arranged in the inside of the sleeve body 1, a limiting mechanism is arranged on the surface of the sleeve body 1, the limiting mechanism is used for limiting the installation pipe 6, a sealing mechanism is arranged on the surface of the installation pipe 6, the sealing mechanism is used for sealing between the installation pipe 6 and the sleeve body 1, an automatic clamping mechanism is arranged in the inside of the sleeve body 1, the automatic clamping mechanism is used for clamping the installation pipe 6 when the internal pressure of the sleeve body 1 increases during transportation after the installation of the installation pipe 6, a positioning mechanism is arranged on the surface of the automatic clamping mechanism, the positioning mechanism is used for limiting the position of the automatic clamping mechanism and the installation pipe 6, and a fastening mechanism is arranged between the automatic clamping mechanism and the limiting mechanism, the fastening mechanism is used for fastening the limiting mechanism when the automatic clamping mechanism clamps the installation pipe 6.

[0037] The limiting mechanism comprises an annular limiting groove 7, the limiting groove 7 is formed on the surface of the installation pipe 6, a plurality of threaded holes 8 are formed on the surface of the sleeve body 1, a top rod 9 is threadedly connected in each of the threaded holes 8, and the end of the top rod 9 is located in the limiting groove 7.

[0038] The sealing mechanism comprises an annular fixing strip 10, the fixing strip 10 is fixedly connected to the surface of the installation pipe 6, two annular grooves 11 are formed on the surface of the fixing strip 10, and a sealing ring 12 is arranged in each of the annular grooves 11.

[0039] The automatic clamping mechanism comprises an annular sliding groove 13, the sliding groove 13 is formed on the inner wall surface of the installation opening 2, the top of the sliding groove 13 is beveled, an extrusion ring 14 is slidably connected in the sliding groove 13, the upper end of the extrusion ring 14 is beveled, and the sealing ring 12 is attached to the inner side of the extrusion ring 14.

[0040] The positioning mechanism comprises an annular positioning groove 15, the positioning groove 15 is formed on the surface of the installation pipe 6, a positioning strip 16 is fixedly connected to the inner side surface of the extrusion ring 14, and the upper end of the positioning strip 16 is beveled.

[0041] The fastening mechanism comprises a plurality of reamers 17 respectively formed on the inner side of the threaded hole 8 close to one side of the mounting opening 2, an elastic fastening block 18 is elastically and slidably connected in the reamer 17, the fastening block 18 is tapered away from one side of the mounting opening 2, the ejector rod 9 penetrates through the fastening block 18 and is threadedly connected with the fastening block 18, an extension groove 19 is formed on the inner wall bottom of the reamer 17, the extension groove 19 downwardly extends and communicates with the sliding groove 13, an elastic fastening plate 20 is elastically and slidably connected in the extension groove 19, the upper end of the fastening plate 20 is arc-shaped, the upper end of the fastening plate 20 is in abutment with the end surface of the fastening block 18, the surface of the extrusion ring 14 is fixedly connected with an extensible pushing block 21, and the pushing block 21 is located below the fastening plate 20;

[0042] In the process of oil drilling, the casing body 1 needs to be installed on the surface of the well, and the end of the well is sealed by the sealing groove 5, and then one end of the installation pipe 6 needs to be moved into the installation opening 2 after the installation of the casing body 1 is completed, and the installation pipe 6 will drive the fixing strip 10 and the sealing ring 12 to move into the installation opening 2, and the fixing strip 10 and the sealing ring 12 will first move to the position of the extrusion ring 14, and the sealing ring 12 will be attached to the inside of the extrusion ring 14 to seal between the extrusion ring 14 and the installation pipe 6, and when the installation pipe 6 moves into the installation opening 2, the positioning strip 16 will move into the positioning groove 15, and then the position of the installation pipe 6 is adjusted so that the limiting groove 7 is located at the position of the jacking rod 9, and then the jacking rod 9 is rotated one by one, and the end of the jacking rod 9 is moved into the limiting groove 7, and the plurality of jacking rods 9 can limit the installation pipe 6 from multiple positions, and then during the transportation of the installation pipe 6, the pressure in the installation opening 2 and the installation pipe 6 gradually increases, and the installation pipe 6 will move upward under the action of the pressure, and the installation ring will drive the extrusion ring 14 to move upward together, and during the upward movement of the extrusion ring 14, the upper end of the extrusion ring 14 will move to the top of the sliding groove 13, and the upper end of the extrusion ring 14 will be extruded to the side close to the installation pipe 6 under the action of the inclined surface at the top of the sliding groove 13, and the extrusion ring 14 can extrude the upper end of the extrusion ring 14 by using the sliding groove 13 when the pressure in the installation pipe 6 increases, so that the extrusion ring 14 can increase the clamping force of the installation pipe 6, so that the installation pipe 6 can be stably clamped by the extrusion ring 14 when the pressure in the installation pipe 6 is high, and the installation pipe 6 is prevented from loosening due to the high-pressure liquid in the installation pipe 6 and the installation opening 2 during long-term use of the installation pipe 6, so that the installation pipe 6 and the casing body 1 are damaged, and during the upward movement of the extrusion ring 14, the extrusion ring 14 will drive the push block 21 to move upward together, and the push block 21 will first move to the bottom position of the fastening plate 20, and then the upward movement of the push block 21 will push the fastening plate 20 upward, and the fastening plate 20 will move upward under the action of the push block 21, and the upper end of the fastening plate 20 will extrude the fastening block 18 to one side, and the fastening block 18 will pull the jacking rod 9 through the threaded connection between the jacking rod 9 and the fastening block 18, which is conducive to the transportation of the installation pipe 6 after the internal pressure of the installation pipe 6 increases, so that the jacking rod can be pulled to one side and kept stable under the action of the fastening block 18, so that the jacking rod 9 is prevented from loosening and the installation pipe 6 is prevented from shaking during the transportation of the installation pipe 6, thereby affecting the limiting of the installation pipe 6 by the jacking rod 9.

[0043] During the transportation of the installation pipe 6, the extrusion ring 14 can only move under the driving action of the installation pipe 6, and as a further scheme of the present application, a plurality of inclined communication holes 22 are formed in the bottom of the sliding groove 13, and the communication holes 22 are communicated with the installation opening 2.

[0044] In the process of conveying the installation pipe 6, the pressure in the installation port 2 and the installation pipe 6 increases, the pressure in the installation port 2 acts on the bottom of the extrusion ring 14 through the communication hole 22, the extrusion ring 14 moves upward under the pressure in the installation port 2, and the upward force of the extrusion ring 14 can be increased when the pressure in the installation port 2 increases, so that the extrusion ring 14 can quickly clamp the installation pipe 6 after the pressure in the installation port 2 increases.

[0045] When the installation pipe 6 moves into the installation port 2, the installation pipe 6 cannot move to the middle position of the installation port 2, and as a further scheme of the present application, a plurality of arc-shaped grooves 23 are arranged at equal angles on the inner wall surface of the installation port 2, the inner wall of the arc-shaped groove 23 is a slope, a plurality of positioning blocks 24 are slidably connected in the arc-shaped grooves 23, and a through hole 25 is formed in the surface of the positioning block 24 and located below the communication hole 22.

[0046] When the installation pipe 6 moves into the installation port 2, the installation pipe 6 moves between the plurality of positioning blocks 24, the plurality of positioning blocks 24 can make the installation pipe 6 be in the middle position of the installation port 2, and the positioning block 24 can make the installation pipe 6 stable, and when the pressure in the installation port 2 increases in the subsequent use of the installation pipe 6, the liquid in the installation pipe 6 acts on the positioning block 24 to move upward in the arc-shaped groove 23, the upward movement of the positioning block 24 moves to the side close to the installation pipe 6 under the action of the arc-shaped groove 23, so as to extrude and clamp the installation pipe 6, so that the installation pipe 6 can be stable during conveying and reduce the vibration of the installation pipe 6 during work.

[0047] In the process of conveying the installation pipe 6, the extrusion ring 14 moves upward to clamp the installation pipe 6 under the action of the sliding groove 13, the annular extrusion ring 14 moves inward by a small amount under the action of the sliding groove 13, and it is difficult to well clamp the installation pipe 6, and as a further scheme of the present application, a plurality of extrusion grooves 26 are arranged at equal angles on the upper end surface of the extrusion ring 14, and the bottom of the installation pipe 6 is a slope.

[0048] In the process of conveying the installation pipe 6, the extrusion ring 14 moves upward under the action of the pressure in the installation port 2, the upper end of the extrusion ring 14 clamps the installation pipe 6 under the action of the sliding groove 13, the extrusion groove 26 can provide space when the upper end of the extrusion ring 14 moves inward to clamp, so as to stably clamp the installation pipe 6 by the upper end of the extrusion ring 14.

[0049] When the installation pipe 6 moves into the installation port 2, the installation pipe 6 moves the positioning strip 16, and the positioning strip 16 is difficult to move into the positioning groove 15, and as a further scheme of the present application, a recess 27 is formed in the inner wall of the sliding groove 13 away from the installation port 2.

[0050] When the installation pipe 6 is moved into the installation opening 2, the installation pipe 6 will press the positioning strip 16, the upper end of the pressing ring 14 will move together, the upper end of the pressing ring 14 will be pressed to move into the accommodation groove 27, and then when the positioning strip 16 moves into the positioning groove 15, the pressing ring 14 returns to the original position, which is beneficial to the outward movement of the upper end of the pressing ring 14, facilitates the movement of the positioning strip 16 into the positioning groove 15, and ensures the installation of the installation pipe 6.

[0051] The above embodiments only exemplarily illustrate the principles and effects of the present application, and are not used to limit the present application. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought disclosed by the present application should be covered by the claims of the present application.

Claims

1. A self-locking ultra-high pressure metal sealing bushing head, comprising a bushing body (1), characterized in that: The sleeve body (1) has an installation port (2) inside. Flat plate valves (3) are connected to both the left and right sides of the sleeve body (1). A pressure gauge (4) is connected to the surface of the rightmost flat plate valve (3). Multiple sealing grooves (5) are provided inside the sleeve body (1). An installation tube (6) is provided inside the sleeve body (1). A limiting mechanism is provided on the surface of the sleeve body (1) to limit the installation tube (6). A sealing mechanism is provided on the surface of the installation tube (6) to seal the connection between the installation tube (6) and the sleeve body (1). The sleeve body (1) is provided with an automatic clamping mechanism. The automatic clamping mechanism is used to automatically clamp the installation tube (6) when the pressure inside the sleeve body (1) increases after the installation of the installation tube (6) is completed and transported. The automatic clamping mechanism is provided with a positioning mechanism on its surface. The positioning mechanism is used to limit the position between the automatic clamping mechanism and the installation tube (6). The automatic clamping mechanism and the limiting mechanism are provided with a fastening mechanism. The fastening mechanism is used to fasten the limiting mechanism when the automatic clamping mechanism clamps the installation tube (6). The automatic clamping mechanism includes an annular sliding groove (13), which is formed on the inner wall surface of the mounting port (2). The top of the sliding groove (13) is inclined, and a compression ring (14) is slidably connected inside the sliding groove (13). The upper end of the compression ring (14) is inclined. The fastening mechanism includes multiple expansion holes (17), which are respectively opened on the surface of the sleeve body (1). A fastening block (18) is elastically slidably connected in the expansion hole (17). The fastening block (18) is tapered on the side away from the installation port (2). An extension groove (19) is opened at the bottom of the inner wall of the expansion hole (17). The extension groove (19) extends downward and communicates with the sliding groove (13). A fastening plate (20) is elastically slidably connected in the extension groove (19). The upper end of the fastening plate (20) is arc-shaped. The upper end of the fastening plate (20) is in contact with the inclined surface of the end of the fastening block (18). A retractable push block (21) is fixedly connected to the surface of the compression ring (14). The push block (21) is located below the fastening plate (20).

2. The ultra-high pressure metal sealing sleeve head with self-locking function according to claim 1, characterized in that: The limiting mechanism includes an annular limiting groove (7), which is opened on the surface of the mounting tube (6). A plurality of the enlarged holes (17) are provided with threaded holes (8), and a push rod (9) is threadedly connected to each of the plurality of threaded holes (8). The push rod (9) passes through the fastening block (18) and is threadedly connected to the fastening block (18).

3. The ultra-high pressure metal sealing sleeve head with self-locking function according to claim 2, characterized in that: The sealing mechanism includes an annular fixing strip (10), which is fixedly connected to the surface of the mounting tube (6). Two annular grooves (11) are opened on the surface of the fixing strip (10), and a sealing ring (12) is provided in the annular groove (11). The sealing ring (12) is in contact with the inner side of the compression ring (14).

4. The ultra-high pressure metal sealing sleeve head with self-locking function according to claim 1, characterized in that: The positioning mechanism includes an annular positioning groove (15), which is formed on the surface of the mounting tube (6). A positioning strip (16) is fixedly connected to the inner surface of the extrusion ring (14), and the upper end of the positioning strip (16) is an inclined surface.

5. The ultra-high pressure metal sealing sleeve head with self-locking function according to claim 1, characterized in that: The bottom of the sliding groove (13) is provided with a plurality of inclined connecting holes (22), which are connected to the mounting port (2).

6. The ultra-high pressure metal sealing sleeve head with self-locking function according to claim 5, characterized in that: The inner wall surface of the installation port (2) is provided with a plurality of arc-shaped grooves (23) arranged at equal angles. The inner wall of the arc-shaped grooves (23) is inclined. A positioning block (24) is slidably connected in the plurality of arc-shaped grooves (23). A through hole (25) is provided on the surface of the positioning block (24). The through hole (25) is located below the position of the connecting hole (22).

7. The ultra-high pressure metal sealing sleeve head with self-locking function according to claim 1, characterized in that: The upper surface of the extrusion ring (14) is provided with multiple extrusion slots (26) arranged at equal angles, and the bottom of the mounting tube (6) is a slope.

8. The ultra-high pressure metal sealing sleeve head with self-locking function according to claim 1, characterized in that: The sliding groove (13) has a clearance groove (27) on the inner wall of the side away from the installation port (2).

Images