Locking type hydraulic cylinder for supporting platform of under-pressure operation machine

Abstract

The utility model discloses a locking type hydraulic cylinder for a supporting platform of an under-pressure operation machine, which comprises a cylinder body and a Tr tooth piston rod slidably connected in the cylinder body, one end of the Tr tooth piston rod is connected with a ball head and a locking trunnion assembly, the ball head is connected with a supporting assembly, and the Tr tooth piston rod is connected with a locking trunnion assembly. The inner wall of the end, arranged in the cylinder body, of the Tr tooth piston rod is connected with an inner guide sleeve, the inner guide sleeve is fixed to the end of the Tr tooth piston rod through an inner gland, the inner guide sleeve and the inner gland are both arranged on the inner piston rod in a sliding and sleeving mode, one end of the inner piston rod is fixed to the cylinder body, and the other end of the inner piston rod is connected with an inner piston. The inner piston is connected to the inner wall of the Tr tooth piston rod in a sliding mode, two oil ports are formed in the cylinder body, a lower platform supporting block is installed on the outer wall of the cylinder body, and the cylinder body is connected with the supporting platform through the lower platform supporting block. The hydraulic locking device is simple in structure, can be mechanically locked after being lifted to a proper position, does not need to maintain hydraulic pressure, is high in reliability, and has simple requirements on a hydraulic system.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic cylinders, in particular to a locking hydraulic cylinder for a support platform of a pressure operation machine. Background Art

[0002] When used as a lifting cylinder for pressure operation equipment, it only needs to provide the gravity during equipment and operation, that is, the lifting force. When operating a well, it needs to be lifted to a corresponding height and maintain a support state for a long time until the construction of a well is completed. However, general hydraulic cylinders are prone to pressure drop and other problems due to some factors during long-term lifting, thus unable to maintain the lifting height. Therefore, a hydraulic cylinder that can be applied to the wellhead support of pressure operation equipment, such as for lower platform support, wellhead stabilizer support, etc., is required. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a locking hydraulic cylinder for a support platform of a pressure operation machine to solve the above problems.

[0004] To solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A locking hydraulic cylinder for a support platform of a pressure operation machine of the utility model includes a cylinder body and a Tr-thread piston rod slidably connected inside the cylinder body. One end of the Tr-thread piston rod placed outside is connected with a ball head and a locking trunnion assembly. A support assembly is connected to the ball head. One end of the Tr-thread piston rod placed inside the cylinder body is hollow, and an inner guide sleeve is connected to the inner wall of the end of the Tr-thread piston rod placed inside the cylinder body. The inner guide sleeve is fixed to the end of the Tr-thread piston rod through an inner gland. Both the inner guide sleeve and the inner gland are slidably sleeved on the inner piston rod. One end of the inner piston rod is fixed to the cylinder body, and the other end is connected with an inner piston. The inner piston is slidably connected to the inner wall of the Tr-thread piston rod. Two oil ports are provided on the cylinder body, and a lower platform support block is installed on the outer wall of the cylinder body. The cylinder body is connected to the support platform through the lower platform support block.

[0006] Further, the support assembly includes a support seat. An arc-shaped groove is formed on the top surface of the support seat. The ball head is placed inside the arc-shaped groove. Two symmetrically arranged pressing plates are covered above the arc-shaped groove. The pressing plates are fixed to the support seat.

[0007] Further, semi-circular clamping grooves are formed at one ends of the two pressing plates close to each other. The two semi-circular clamping grooves are spliced into a complete circle. The diameter of the semi-circular clamping groove is smaller than the diameter of the ball head.

[0008] Further, a column is sleeved on the outer wall of the cylinder body. The column is fixed to the lower platform support block.

[0009] Further, a first oil passage is provided on the inner piston rod, and the first oil passage places oil in the space formed between the inner wall of the Tr-thread piston rod, the inner guide sleeve, the inner piston rod, and the inner piston.

[0010] Further, a second oil passage is provided on the cylinder block, and the second oil passage places oil in the space formed between the cylinder block, the inner wall of the Tr-thread piston rod, the inner guide sleeve, and the inner piston rod.

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

[0012] The structure of the present utility model is simple, and it can be mechanically locked after being lifted to an appropriate position, without the need to maintain hydraulic pressure, with high reliability and simple requirements for the hydraulic system. Description of the Drawings

[0013] The following further describes the present utility model with reference to the drawings.

[0014] Figure 1 It is the front view of the locking type hydraulic cylinder for the support platform of the pressure operation machine of the present utility model;

[0015] Figure 2 It is the cross-sectional view of the cylinder block;

[0016] Figure 3 It is the cross-sectional view of the cylinder block when the present utility model is in use;

[0017] Description of the reference numerals: 1. Cylinder block; 2. Tr-thread piston rod; 3. Ball head; 4. Inner guide sleeve; 5. Inner gland; 6. Inner piston rod; 7. Inner piston; 8. Locking trunnion assembly; 9. Lower platform support block; 10. Support seat; 11. Arc-shaped groove; 12. Pressing plate; 13. Column; 14. First oil passage; 15. Second oil passage. Detailed Embodiments

[0018] As Figures 1-3 shown, a locking type hydraulic cylinder for the support platform of a pressure operation machine includes a cylinder block 1 and a Tr-thread piston rod 2 slidably connected inside the cylinder block 1. A ball head 3 and a locking trunnion assembly 8 are connected to one end of the Tr-thread piston rod 2 outside the body, and mechanical locking is performed through the locking trunnion assembly 8.

[0019] A support assembly is connected to the ball head 3. The support assembly includes a support base 10. An arc-shaped groove 11 is formed on the top surface of the support base 10. The ball head 3 is placed in the arc-shaped groove 11. Two symmetrically arranged pressing plates 12 are covered above the arc-shaped groove 11, and the pressing plates 12 are fixed on the support base 10. Semi-circular card slots are formed at one ends of the two pressing plates 12 close to each other. The two semi-circular card slots are spliced into a complete circle, and the diameter of the semi-circular card slot is smaller than the diameter of the ball head 3. The spherical end of the ball head 3 is clamped in the arc-shaped groove 11 by the two pressing plates 12.

[0020] A column 13 is sleeved on the outer wall of the cylinder block 1, and the column 13 is fixed on the lower platform support block 9.

[0021] One end of the Tr-thread piston rod 2 placed in the cylinder block 1 is hollow. An inner guide sleeve 4 is connected to the inner wall of the end of the Tr-thread piston rod 2 placed inside the cylinder block 1. The inner guide sleeve 4 is fixed to the end of the Tr-thread piston rod 2 through an inner gland 5. Both the inner guide sleeve 4 and the inner gland 5 are slidably sleeved on the inner piston rod 6. One end of the inner piston rod 6 is fixed to the cylinder block 1, and the other end is connected to an inner piston 7. The inner piston 7 is slidably connected to the inner wall of the Tr-thread piston rod 2. Two oil ports are provided on the cylinder block 1.

[0022] A first oil passage 14 is formed on the inner piston rod 6. The first oil passage 14 places oil in the space formed between the inner wall of the Tr-thread piston rod 2, the inner guide sleeve 4, the inner piston rod 6, and the inner piston 7.

[0023] A second oil passage 15 is formed on the cylinder block 1. The second oil passage 15 places oil in the space formed between the cylinder block 1, the inner wall of the Tr-thread piston rod 2, the inner guide sleeve 4, and the inner piston rod 6.

[0024] A lower platform support block 9 is installed on the outer wall of the cylinder block 1. The cylinder block 1 is connected to the support platform through the lower platform support block 9.

[0025] The above-described embodiments are only descriptions of the preferred modes of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A locking hydraulic cylinder for a support platform of a belt pressure working machine, characterized in that: The invention comprises a cylinder body (1) and a Tr-thread piston rod (2) slidably connected to the inside of the cylinder body (1); the end of the Tr-thread piston rod (2) placed outside is connected to a ball head (3) and a locking ear shaft assembly (8); the ball head (3) is connected to a support assembly; the end of the Tr-thread piston rod (2) placed in the cylinder body (1) is hollow; the inner wall of the end of the Tr-thread piston rod (2) placed inside the cylinder body (1) is connected to an inner guide sleeve (4); the inner guide sleeve (4) is fixed to the cylinder body through an inner pressure cover (5). At the end of the Tr tooth piston rod (2), the inner guide sleeve (4) and the inner pressure cover (5) are both slidably sleeved on the inner piston rod (6); one end of the inner piston rod (6) is fixed on the cylinder body (1), and the other end is connected to the inner piston (7); the inner piston (7) is slidably connected to the inner wall of the Tr tooth piston rod (2); two oil ports are provided on the cylinder body (1); a lower platform support block (9) is installed on the outer wall of the cylinder body (1); the cylinder body (1) is connected to the support platform through the lower platform support block (9).

2. The locking hydraulic cylinder for the support platform of the belt pressure working machine according to claim 1 is characterized in that: The support assembly comprises a support seat (10), an arc-shaped groove (11) is provided on the top surface of the support seat (10), the ball head (3) is placed in the arc-shaped groove (11), and two symmetrically arranged pressure plates (12) are covered above the arc-shaped groove (11), and the pressure plates (12) are fixed on the support seat (10).

3. The locking hydraulic cylinder for the support platform of the belt pressure working machine according to claim 2 is characterized in that: A semicircular groove is provided on one end of the two pressing plates (12) close to each other. The two semicircular grooves are spliced ​​into a complete circle. The diameter of the semicircular groove is smaller than the diameter of the ball head (3).

4. The locking hydraulic cylinder for the support platform of the belt pressure working machine according to claim 1 is characterized in that: A column (13) is sleeved on the outer wall of the cylinder body (1), and the column (13) is fixed on the lower platform support block (9).

5. The locking hydraulic cylinder for the support platform of the belt pressure working machine according to claim 1 is characterized in that: The inner piston rod (6) is provided with a first oil passage (14), and the first oil passage (14) places oil in a space formed between the inner wall of the threaded piston rod (2), the inner guide sleeve (4), the inner piston rod (6) and the inner piston (7).

6. The locking hydraulic cylinder for the support platform of the belt pressure working machine according to claim 1, characterized in that: The cylinder body (1) is provided with a second oil passage (15), and the second oil passage (15) places oil in a space formed between the cylinder body (1), the inner wall of the threaded piston rod (2), the inner guide sleeve (4) and the inner piston rod (6).

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