A main jaw limiting mechanism of a petroleum hydraulic tong

Abstract

This utility model relates to the field of oil hydraulic clamp technology and discloses a main clamp limiting mechanism for an oil hydraulic clamp. The mechanism includes a main clamp body, with several sets of support components fixedly connected inside the main clamp body. A support shaft is fixedly connected to the bottom of each support component, and rollers are rotatably connected to the surface of the support shaft. Three sets of positioning pins are fixedly connected to the top surface of the main clamp body, and reinforcing components are sleeved on the surface of each positioning pin. Each support component includes a support spring fixedly connected inside the main clamp body, and a positioning rod is sleeved inside the support spring. The reinforcing component includes a stress ring sleeved on the surface of the positioning pin. This main clamp limiting mechanism for an oil hydraulic clamp, through the arrangement of the support components, support shaft, and rollers, reduces friction within the main clamp body, preventing wear caused by friction. Simultaneously, it achieves uniform load distribution among the multiple rollers, avoiding localized stress concentration and increasing the smoothness of the main clamp body's internal rotation.

Description

Technical Field

[0001] This utility model relates to the field of oil hydraulic clamp technology, and in particular to a main clamp limiting mechanism for oil hydraulic clamps. Background Technology

[0002] Hydraulic power tongs are open-end type power tongs, mechanized equipment used in oilfield well workover operations for threading sucker rods, tubing, casing, insulation pipes, drill pipes, and similar tubing strings. Existing power tongs mainly consist of a main tong and a back tong. The back tong clamps the tubing string coupling, while the main tong clamps the tubing string and rotates it to complete the connection and disconnection of pipes. The main tong's limiting mechanism is one of the key components of the hydraulic tong, ensuring that the jaws have an appropriate opening and closing range during operation, preventing excessive closing or opening, thus guaranteeing operational safety and accuracy.

[0003] A main clamp limiting mechanism for a hydraulic oil clamp, disclosed in publication CN210977349U, includes a wheel cover. Connecting plates and jaw plate frames are respectively provided on the upper and lower sides of the wheel cover. A flange is provided on the upper part of the jaw plate frame, passing through the wheel cover and fixedly connected to the connecting plate. A cover plate is provided on the upper side of the connecting plate, and a limiting groove with an arc-shaped trajectory is opened on the lower side of the connecting plate. The rotation axis of the limiting groove coincides with the rotation axis of the wheel cover. A rotatable limiting rod with its upper end extending out of the cover plate is inserted through the middle of the limiting groove. A blind hole is opened on the lower end face of the limiting rod, and a notch is opened at the lower end of the limiting rod. A pin fixed to the wheel cover is provided directly below the blind hole, with its upper end extending into the limiting groove. The diameter of the pin is smaller than both the width of the notch and the diameter of the blind hole. A positioning component fixed to the cover plate is provided at the upper end of the limiting rod. This utility model has a simple structure, provides excellent limiting for the return of the jaw plate frame, improves the service life of the jaw plate frame, and prevents the jaw plate frame from damaging pipes or drilling tools.

[0004] However, the main clamp limiting mechanism of this hydraulic oil clamp has the following disadvantages: during use, the main clamp is prone to friction inside the main clamp housing, which leads to wear on the surface of the main clamp, and uneven load distribution can cause unstable rotation, affecting the clamping force. Utility Model Content

[0005] The purpose of this utility model is to provide a main clamp limiting mechanism for oil hydraulic clamps, which solves the problems mentioned in the background art, such as the main clamp easily generating friction inside the main clamp housing during use, leading to wear on the surface of the main clamp, and uneven load distribution causing unstable rotation, thus affecting the clamping force.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a main clamp limiting mechanism for a hydraulic oil clamp, comprising a main clamp body, wherein several sets of support components are fixedly connected inside the main clamp body, a support shaft is fixedly connected to the bottom of each support component, and rollers are rotatably connected to the surface of the support shaft; three sets of positioning pins are fixedly connected to the top surface of the main clamp body, and reinforcing components are sleeved on the surface of each positioning pin; each support component includes a support spring fixedly connected inside the main clamp body, and a positioning rod is sleeved inside the support spring; the reinforcing component includes a stress ring sleeved on the surface of the positioning pin, and several sets of limiting blocks are fixedly connected to the outer side of the stress ring.

[0007] As a further embodiment of this utility model, the surface of the roller is slidably connected to the main clamp housing, and the inside of the main clamp housing is provided with a sliding groove adapted to the roller. The sliding groove facilitates the rotation of the roller inside.

[0008] As a further embodiment of this utility model, a drive motor is fixedly connected to the top of one side of the main clamp housing, and a transmission gear set is provided at the output end of the drive motor. The transmission gear set serves to transmit the power of the drive motor.

[0009] As a further embodiment of this utility model, a back clamp housing is provided at the bottom of the main clamp housing. Three sets of clamping pads are rotatably connected to the inner top walls of both the main clamp housing and the back clamp housing. Protective pads are fixedly connected to the surface of the clamping pads. This arrangement increases the protective capability of the clamping pad surface.

[0010] As a further embodiment of this utility model, two sets of positioning plates are fixedly connected to one side of both the main clamp housing and the back clamp housing. A connecting shaft is rotatably connected inside the positioning plate, and the connecting shaft plays a role in transmission.

[0011] As a further embodiment of this utility model, a hook is fixedly connected to the top surface of one side of the main clamp housing, and a connecting ring is fixedly connected to one side of the main clamp housing. The connecting ring facilitates the connection of external devices.

[0012] As a further embodiment of this utility model, a sliding groove is provided on one side of the main clamp body, and a sliding rod is slidably connected inside the sliding groove. The sliding rod drives the main clamp body to rotate.

[0013] As a further embodiment of this utility model, the main clamp body has a groove inside that matches the clamp seat, and the main clamp body has an opening around its periphery that matches the support shaft. The opening facilitates the sliding of the support shaft inside.

[0014] This utility model provides a main clamp limiting mechanism for oil hydraulic clamps, which has the following beneficial effects:

[0015] 1. The main clamp limiting mechanism of this hydraulic oil clamp, through the arrangement of support components, support shafts and rollers, allows the transmission mechanism inside the main clamp housing to drive the slide rod to slide in the slide groove on the main clamp body during use. This, in turn, pushes the main clamp body to rotate within the main clamp housing. The rotation of the main clamp body causes the rollers to roll within the main clamp housing. Simultaneously, the support spring contracts under force, and the positioning rod extends and retracts within the cavity of the main clamp body. This causes the support spring to generate elastic force to offset part of the rolling compression impact, thereby reducing friction of the main clamp body within the main clamp housing and preventing wear caused by friction. At the same time, it achieves uniform load distribution among the multiple rollers, avoids local stress concentration, and increases the smoothness of the main clamp body's internal rotation.

[0016] 2. The main clamp limiting mechanism of this hydraulic oil clamp, through the setting of reinforced components, is designed to prevent the opening of the main clamp body from being subjected to turning pressure during the clamping process. The stress ring increases the supporting stress on the surface of the main clamp body, and the pressure is transmitted to the positioning pin through the stress ring, providing turning support for the stress ring. At the same time, the limiting block also supports the surface of the stress ring, thereby strengthening the supporting capacity of the main clamp body surface, preventing excessive turning clamping pressure from causing deformation or breakage of the main clamp body surface, and improving the supporting strength of the main clamp. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the disassembled structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the reinforcing component and main clamp body structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the support component, support shaft, and roller structure of this utility model.

[0021] In the diagram: 1. Main clamp body; 2. Support assembly; 201. Support spring; 202. Positioning rod; 3. Support shaft; 4. Roller; 5. Positioning post; 6. Reinforcing assembly; 601. Stress ring; 602. Limiting block; 7. Main clamp housing; 8. Drive motor; 9. Back clamp housing; 11. Cladle seat; 12. Protective pad; 13. Positioning plate; 14. Connecting shaft; 15. Hook; 16. Connecting ring; 17. Slide rod. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0023] Please see Figures 1 to 4 This utility model provides a technical solution: a main clamp limiting mechanism for a hydraulic oil clamp, including a main clamp body 1. Several sets of support components 2 are fixedly connected inside the main clamp body 1. Through the arrangement of the support components 2, support shafts 3, and rollers 4, friction of the main clamp body 1 within the main clamp housing 7 is reduced, preventing wear caused by friction. Simultaneously, the load is evenly distributed among the multiple rollers 4, avoiding localized stress concentration and increasing the smoothness of rotation of the main clamp body 1 inside. A support shaft 3 is fixedly connected to the bottom of the support components 2, and rollers 4 are rotatably connected to the surface of the support shaft 3. Three sets of positioning posts 5 are fixedly connected to the top surface of the main clamp body 1. The surface of the positioning posts 5 is fitted with a reinforcing component 6. By setting the reinforcing component 6, the support capacity of the surface of the main clamp body 1 is enhanced, preventing excessive turning and clamping pressure from causing deformation or breakage of the surface of the main clamp body 1, and improving the support strength of the main clamp. The support component 2 includes a support spring 201 fixedly connected inside the main clamp body 1. The inside of the support spring 201 is fitted with a positioning rod 202. The reinforcing component 6 includes a stress ring 601 fitted on the surface of the positioning posts 5. Several sets of limiting blocks 602 are fixedly connected to the outside of the stress ring 601.

[0024] The surface of the roller 4 is slidably connected to the main clamp housing 7. The inside of the main clamp housing 7 is provided with a sliding groove that is compatible with the roller 4. The sliding groove facilitates the rotation of the roller 4 inside.

[0025] A drive motor 8 is fixedly connected to the top of one side of the main clamp housing 7. The output end of the drive motor 8 is equipped with a transmission gear set, which transmits the power of the drive motor 8.

[0026] The bottom of the main clamp housing 7 is provided with a back clamp housing 9. The inner top walls of the main clamp housing 7 and the back clamp housing 9 are rotatably connected with three sets of clamp seats 11. The surface of the clamp seats 11 is fixedly connected with a protective pad 12. The arrangement of the pads increases the protective capability of the surface of the clamp seats 11.

[0027] Two sets of positioning plates 13 are fixedly connected to one side of both the main clamp housing 7 and the back clamp housing 9. A connecting shaft 14 is rotatably connected inside the positioning plate 13, and the connecting shaft 14 plays a role in transmission.

[0028] A hook 15 is fixedly connected to the top surface of one side of the main clamp housing 7, and a connecting ring 16 is fixedly connected to one side of the main clamp housing 7. The connecting ring 16 facilitates the connection of external equipment.

[0029] A sliding groove is provided on one side of the main clamp body 1, and a sliding rod 17 is slidably connected inside the sliding groove. The sliding rod 17 drives the main clamp body 1 to rotate.

[0030] The main clamp body 1 has a groove inside that matches the clamp seat 11, and the main clamp body 1 has an opening around its periphery that matches the support shaft 3. The opening facilitates the sliding of the support shaft 3 inside.

[0031] In this invention, the working steps of the device are as follows:

[0032] First step: When in use, the transmission mechanism inside the main clamp housing 7 drives the slide bar 17 to slide in the slide groove on the main clamp body 1, thereby pushing the main clamp body 1 to rotate inside the main clamp housing 7, and the rotation of the main clamp body 1 causes the roller 4 to roll inside the main clamp housing 7.

[0033] Second step: At the same time, the support spring 201 is compressed by force, and the positioning rod 202 extends and retracts in the cavity of the main clamp body 1, so that the support spring 201 generates elastic force to offset part of the rolling compression impact.

[0034] Third step: During the clamping process, the opening of the main clamp body 1 is easily subjected to turning pressure. The stress ring 601 increases the supporting stress on the surface of the main clamp body 1, and the pressure is transmitted to the positioning post 5 through the stress ring 601, and provides turning support for the stress ring 601. At the same time, the limiting block 602 also supports the surface of the stress ring 601.

[0035] It should be noted that the device structure and accompanying drawings of this utility model mainly describe the principle of this utility model. In terms of the technical aspects of this design principle, the setting of the power mechanism, power supply system and control system of the device is not fully described. However, under the premise that those skilled in the art understand the principle of the above utility model, the specific details of its power mechanism, power supply system and control system can be clearly understood. The control method in the application document is automatic control through a controller. The control circuit of the controller can be implemented by those skilled in the art through simple programming.

[0036] All standard parts used can be purchased from the market, and can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the existing technology. The machinery, parts and equipment adopt conventional models in the existing technology, and the structure and principle of the components known to those skilled in the art can be known by those skilled in the art through technical manuals or conventional experimental methods.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A main clamp limiting mechanism for oil hydraulic clamps, comprising a main clamp body (1), characterized in that: The main clamp body (1) is internally fixedly connected to several sets of support components (2), the bottom of the support components (2) is fixedly connected to a support shaft (3), the surface of the support shaft (3) is rotatably connected to a roller (4), the top surface of the main clamp body (1) is fixedly connected to three sets of positioning posts (5), and the surface of the positioning posts (5) is sleeved with a reinforcing component (6). The support assembly (2) includes a support spring (201) fixedly connected inside the main clamp body (1), and a positioning rod (202) is sleeved inside the support spring (201). The reinforcing component (6) includes a stress ring (601) sleeved on the surface of the positioning post (5), and a number of limiting blocks (602) are fixedly connected to the outside of the stress ring (601).

2. The main clamp limiting mechanism of a hydraulic oil clamp according to claim 1, characterized in that: The surface of the roller (4) is slidably connected to the main clamp housing (7), and the inside of the main clamp housing (7) is provided with a sliding groove that is compatible with the roller (4).

3. The main clamp limiting mechanism of a hydraulic oil clamp according to claim 2, characterized in that: A drive motor (8) is fixedly connected to the top of one side of the main clamp housing (7), and a transmission gear set is provided at the output end of the drive motor (8).

4. The main clamp limiting mechanism of a hydraulic oil clamp according to claim 3, characterized in that: The bottom of the main clamp housing (7) is provided with a back clamp housing (9). The inner top walls of the main clamp housing (7) and the back clamp housing (9) are rotatably connected with three sets of slip seats (11). The surface of the slip seats (11) is fixedly connected with a protective pad (12).

5. The main clamp limiting mechanism of a hydraulic oil clamp according to claim 2, characterized in that: Two sets of positioning plates (13) are fixedly connected to one side of the main clamp housing (7) and the back clamp housing (9), and a connecting shaft (14) is rotatably connected inside the positioning plate (13).

6. The main clamp limiting mechanism of a hydraulic oil clamp according to claim 2, characterized in that: A hook (15) is fixedly connected to the top surface of one side of the main clamp housing (7), and a connecting ring (16) is fixedly connected to one side of the main clamp housing (7).

7. The main clamp limiting mechanism of a hydraulic oil clamp according to claim 1, characterized in that: A sliding groove is provided on one side of the main clamp body (1), and a sliding rod (17) is slidably connected inside the sliding groove.

8. The main clamp limiting mechanism of a hydraulic oil clamp according to claim 1, characterized in that: The main clamp body (1) has a slot inside that is compatible with the clamp seat (11), and the main clamp body (1) has an opening around its periphery that is compatible with the support shaft (3).

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