Throttle valve dismounting auxiliary device with positioning function

Abstract

The utility model discloses a throttle valve dismounting auxiliary device with a positioning function, which comprises a valve body, an auxiliary mechanism is arranged at the top of the valve body, the auxiliary mechanism comprises two groups of supporting cross beams, two groups of pulley blocks are arranged on the supporting cross beams in a sliding mode, and supporting connecting bottom plates are arranged at the bottoms of the four groups of pulley blocks. Limiting bolts are installed on the four pulley blocks, limiting blocks are installed on one sides of the supporting cross beams, stabilizing blocks are installed on the other sides of the supporting cross beams, a rotary connecting sleeve is further installed between the two supporting cross beams, an alignment bearing and a thrust bearing are installed in the rotary connecting sleeve, and the alignment bearing and the thrust bearing are connected with a rotary connecting shaft. A rotary positioning block is installed at the top of the rotary connecting shaft, an upper cover plate is installed at the top of the rotary connecting sleeve, four angle positioning holes are formed in the upper cover plate, a positioning screw is installed in one angle positioning hole, the bottom of the positioning screw is installed on the rotary positioning block in a locking mode, and the lower side of the rotary connecting shaft is connected with a connecting clamp through threads.

Description

Technical Field

[0001] This utility model belongs to the field of throttle valve technology, specifically relating to a throttle valve disassembly and assembly auxiliary device with positioning function. Background Technology

[0002] A throttle valve is a valve that controls fluid flow by changing the throttling cross-section or throttling length. Throttling valves used in oil and gas drilling are key devices for controlling drilling fluid pressure and flow at the wellhead. Their main function is to control fluid pressure and flow by adjusting the opening between the valve core and the valve seat. Because the valve core and seat of a throttle valve are constantly exposed to the scouring of high-speed, sand-laden fluids, their wear rate is accelerated, leading to more frequent maintenance. On-site maintenance of the throttle valve core typically requires multiple people working together. This process is not only labor-intensive, time-consuming, and inefficient, but also prone to damage to throttle valve components, sometimes even causing the valve to malfunction.

[0003] Chinese Patent Publication No. CN207122653U discloses a telescopic throttle valve maintenance bracket, comprising a maintenance bracket body, a telescopic rod, a rotating disk fixed to the telescopic rod via a support frame assembly, a mounting plate fixed to the rotating disk by bolts, a valve body mounted on the mounting plate by bolts, a union joint at one end of the valve body, a cylinder valve cover assembly housed within the union joint, and a rotating support at one end of the maintenance bracket body, with a connecting ring at the bottom of the rotating support, the connecting ring fitting around the outside of the cylinder valve cover assembly. When the throttle valve undergoes on-site maintenance, the union joint is loosened, and the cylinder valve cover assembly is pulled outwards, allowing the valve core sleeve to be pulled out of the valve body. Under the action of the telescopic rod, the cylinder valve cover assembly is suspended in mid-air, and can be rotated 360° around the vertical axis of the rotating support via the rotating support, or rotated horizontally to any position via the rotating disk, facilitating on-site online maintenance of the throttle valve.

[0004] However, the aforementioned patent relies solely on a single beam to suspend the valve core. The single-arm suspended beam has high deflection under stress, low strength, and is not stable enough, making it prone to deformation and damage. Furthermore, after the valve core and other components are pulled out, the whole assembly cannot be fixed, which can easily cause the valve core to move again, resulting in collisions and damage. Moreover, after being pulled out, the valve core is prone to rotation, making subsequent installation or disassembly inconvenient. Therefore, there is an urgent need for a throttle valve disassembly and assembly auxiliary device with positioning function to solve the above problems. Utility Model Content

[0005] In view of the problems mentioned above in the background technology, the purpose of this utility model is to provide an auxiliary device for disassembling and assembling a throttle valve with positioning function.

[0006] To achieve the above-mentioned technical objectives, the technical solution adopted by this utility model is as follows:

[0007] A throttle valve assembly / disassembly auxiliary device with positioning function includes a valve body, a locking cover connected to the valve body via threads, a connecting sleeve installed inside the locking cover, a connecting flange installed on the outer side of the connecting sleeve, a valve sleeve installed inside the connecting sleeve, the valve sleeve installed inside the valve body, a valve stem installed inside the valve sleeve, and a valve core locked to the valve stem by a locking screw. An auxiliary mechanism is installed on the top of the valve body, the auxiliary mechanism including two sets of support beams, two sets of pulleys slidably mounted on the support beams, and a support connecting base plate installed at the bottom of the four sets of pulleys. The support connecting base plate is installed on one end face of the valve body, and each of the four sets of pulleys is equipped with a limit pin. The support beams have pin holes at the corresponding limit pin locations. A limit block is installed on one side of the supporting beam, and a stabilizing block is installed on the other side of the supporting beam. A rotating connecting sleeve is also installed between the two sets of supporting beams. The rotating connecting sleeve is located outside the stabilizing block. A centering bearing and a thrust bearing are installed inside the rotating connecting sleeve. The centering bearing and the thrust bearing are connected to a rotating connecting shaft. A rotating positioning block is installed on the top of the rotating connecting shaft. A top cover plate is installed on the top of the rotating connecting sleeve. The top cover plate has four angle positioning holes. A positioning screw is installed in one of the angle positioning holes. The bottom of the positioning screw is locked onto the rotating positioning block. A connecting clamp is threaded to the lower side of the rotating connecting shaft. The connecting clamp is installed on the connecting flange.

[0008] Further specifying, the pulley block includes a pulley frame, with pulleys mounted on its upper and lower sides. The pulleys are nylon, non-metallic rollers, and each roller contains a bearing. The support beam is slidably disposed between the upper and lower pulleys. The pulley frame has positioning holes between the upper and lower pulleys, and the limiting pin is installed in the positioning holes. This structural design ensures the smooth sliding of the support beam, reduces frictional sparks, provides high safety, is quieter and more stable, and also has a limiting effect.

[0009] Furthermore, a positioning connecting screw is installed at the top center of the upper cover plate. The bottom of the positioning connecting screw passes through the rotating positioning block and is locked onto the rotating connecting shaft. The four angle positioning holes are evenly arranged on the upper cover plate at angles of 0°-90°-180°-270°, centered on the positioning connecting screw. This structural design locks the rotating connecting shaft in place and limits and fixes its position after rotation.

[0010] Furthermore, the installation order of the centering bearing and the thrust bearing within the rotating connecting sleeve can be interchanged, and a lower cover plate is also installed at the bottom of the rotating connecting sleeve. This structural design facilitates installation and use, and also prevents the bearings from falling off.

[0011] Furthermore, the outer end of the locking cover is provided with an arc-shaped protrusion. This structural design reduces the contact friction between the valve core and the connecting clamp, while also applying a compressive force to the connecting clamp, causing the valve core to automatically disengage from the valve body axially.

[0012] The beneficial effects of this utility model are as follows: This utility model adopts a double-support crossbeam for guided movement, which minimizes deflection, increases strength, and ensures stable assembly and disassembly. It is also equipped with a pulley system for stable guided movement. After movement, the support crossbeam is limited by inserting a limit pin. After the valve core assembly is extended and removed, it can be locked to limit its forward and backward movement and prevent secondary sliding, which could cause the valve core to collide and be damaged. At the same time, a thrust bearing and a centering bearing are provided to allow the rotating connecting shaft to rotate freely and smoothly. After the valve core is pulled out, the angle positioning hole can also limit the valve core from rotating freely, which is convenient for installing and removing the valve core. Attached Figure Description

[0013] This utility model can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0014] Figure 1 This is a schematic diagram of the axial structure of a throttle valve disassembly and assembly auxiliary device with positioning function according to an embodiment of the present invention;

[0015] Figure 2 This is a cross-sectional view of a throttle valve disassembly and assembly auxiliary device with positioning function according to an embodiment of the present invention.

[0016] Figure 3 This is a schematic cross-sectional view of the connecting clamp structure of a throttle valve disassembly and assembly auxiliary device with positioning function according to an embodiment of the present invention;

[0017] Figure 4 This is a cross-sectional structural diagram of the disassembly state of a throttle valve disassembly and assembly auxiliary device with positioning function according to an embodiment of the present invention;

[0018] Figure 5 This is a schematic diagram of the axonal structure of an auxiliary mechanism for a throttle valve disassembly and assembly auxiliary device with positioning function according to an embodiment of the present invention;

[0019] Figure 6 This is a schematic cross-sectional view of the support beam structure of a throttle valve disassembly and assembly auxiliary device with positioning function according to an embodiment of the present invention;

[0020] The symbols for the main components are explained below:

[0021] 1. Valve body; 2. Locking gland; 3. Arc protrusion; 4. Connecting sleeve; 5. Connecting flange; 6. Valve stem; 7. Valve core; 8. Auxiliary mechanism; 9. Support beam; 10. Pulley block; 11. Support connecting base plate; 12. Limiting pin; 13. Pin hole; 14. Limiting block; 15. Stabilizing block; 16. Rotating connecting sleeve; 17. Centering bearing; 18. Thrust bearing; 19. Rotating connecting shaft; 20. Rotating positioning block; 20. Upper cover plate; 21. Angle positioning hole; 22. Positioning screw; 33. Connecting clamp; 44. Pulley bracket; 5. Pulley; 6. Positioning hole; 7. Positioning connecting screw; 85. Lower cover plate; 86. Detailed Implementation

[0022] To enable those skilled in the art to better understand this utility model, the technical solution of this utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0023] Example 1, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a throttle valve disassembly and assembly auxiliary device with positioning function is disclosed. A valve body 1 is threadedly connected to a locking cover 2. A connecting sleeve 3 is installed inside the locking cover 2. A connecting flange 4 is installed on the outer side of the connecting sleeve 3. A valve sleeve 5 is installed inside the connecting sleeve 3 and is installed within the valve body 1. A valve stem 6 is installed inside the valve sleeve 5. A valve core 7 is locked to the valve stem 6 by a locking screw. An auxiliary mechanism 8 is installed on the top of the valve body 1. The auxiliary mechanism 8 includes two sets of supporting beams 801. Two sets of pulley groups 802 are slidably mounted on the supporting beams 801. A supporting connecting base plate 803 is installed at the bottom of the four sets of pulley groups 802. The supporting connecting base plate 803 is installed on one end face of the valve body 1. Limiting pins 804 are installed on each of the four sets of pulley groups 802. The supporting beams 801 have pin holes 805 at the corresponding limiting pins 804. A limiting block 806 is installed on one side of the supporting beams 801. A stabilizing block 807 is installed on the other side of the crossbeam 801. A rotating connecting sleeve 808 is also installed between the two sets of supporting crossbeams 801. The rotating connecting sleeve 808 is located outside the stabilizing block 807. A centering bearing 809 and a thrust bearing 8010 are installed inside the rotating connecting sleeve 808. The centering bearing 809 and the thrust bearing 8010 are connected to a rotating connecting shaft 8011. A rotating positioning block 8012 is installed on the top of the rotating connecting shaft 8011. A top cover plate 8013 is installed on the top of the rotating connecting sleeve 808. The top cover plate 8013 has four angle positioning holes 8014. A positioning screw 8015 is installed in one of the angle positioning holes 8014. The bottom of the positioning screw 8015 is locked onto the rotating positioning block 8012. A connecting clamp 8016 is threadedly connected to the lower side of the rotating connecting shaft 8011. The connecting clamp 8016 is installed on the connecting flange 4.

[0024] In this embodiment, when disassembly is required, the locking cover 2 is rotated, causing it to move outward along the threads on the valve body 1 until it presses against the connecting clamp 8016, applying pressure to it. This causes the connecting clamp 8016 to move the connecting flange 4, which in turn moves the connecting sleeve 3. The connecting sleeve 3 then moves the valve sleeve 5, which in turn moves the valve stem 6. The valve stem 6 then moves the valve core 7 out of the valve body 1. Simultaneously, the connecting clamp 8016 moves the rotating connecting shaft 8011, which in turn moves the rotating connecting sleeve 808 outward. The rotating connecting sleeve 808 then moves the supporting beams 801 on both sides to slide within the pulley system 802, providing smooth guidance. After the valve core 7 is detached from the valve body 1, the limiting pin 804 on the pulley block 802 is inserted into the pin hole 805 on the support beam 801 to limit the support beam 801 and prevent it from moving again. Then, the positioning screw 8015 is released, and the rotating connecting shaft 8011 is rotated. The rotating connecting shaft 8011 rotates smoothly under the effect of the straightening bearing 809 and the thrust bearing 8010. This allows the rotating connecting shaft 8011 to drive the connecting clamp 8016, which in turn drives the connecting flange 4 to change direction easily. This facilitates the disassembly and replacement of the valve core 7, which has changed direction. After the rotating connecting shaft 8011 has changed direction, the positioning screw 8015 is locked again to prevent rotation during the disassembly and replacement of the valve core 7.

[0025] During installation, the connecting clamp 8016 is first installed on the connecting flange 4, and then the rotating connecting shaft 8011 is locked and installed on the connecting clamp 8016. This allows for fine-tuning of the valve core assembly suspension height on-site according to actual conditions, reducing assembly errors.

[0026] Example 2, as Figure 1 , Figure 5 and Figure 6 As shown, this embodiment adds the following structure based on embodiment 1: the pulley block 802 includes a pulley frame 8017, pulleys 8018 are installed on the upper and lower sides of the pulley frame 8017, the pulleys 8018 are nylon non-metallic rollers, and bearings are provided inside the rollers. The support beam 801 is slidably disposed between the upper and lower pulleys 8018. The pulley frame 8017 is provided with a positioning hole 8019 between the upper and lower pulleys 8018, and the limiting pin 804 is installed in the positioning hole 8019.

[0027] In this embodiment, during use, when the support beams 801 on both sides slide on the pulley frame 8017, they move smoothly guided by the pulleys 8018 on both sides. The pulleys 8018 are made of nylon and are non-metallic, which reduces frictional sparks during sliding, ensuring high safety, quietness, and stability. After sliding into position, the pin hole 805 on the support beam 801 is aligned with the positioning hole 8019, and finally the limiting pin 804 is inserted, so that the limiting pin 804 passes through the positioning hole 8019 and the pin hole 805, thereby limiting the support beam 801.

[0028] Example 3, as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, this embodiment adds the following structure based on embodiment 1: a positioning connecting screw 8020 is installed at the top center of the upper cover plate 8013, the bottom of the positioning connecting screw 8020 passes through the rotating positioning block 8012 and is locked on the rotating connecting shaft 8011, and four angle positioning holes 8014 are evenly arranged on the upper cover plate 8013 with the positioning connecting screw 8020 as the center in the range of 0°-90°-180°-270°.

[0029] In this embodiment, during installation, the positioning connecting screw 8020 can be used to position the rotating connecting shaft 8011. At the same time, four limiting holes of 0°, 90°, 180° and 270° are designed on the upper cover plate 8013, which are fixed with positioning screws 8015 to limit the position of the connecting shaft 8011 after rotation, so that the valve core assembly will not rotate at will, so as to facilitate the installation and disassembly of the valve core.

[0030] Example 4, as Figure 3 As shown, this embodiment adds the following structure to embodiment 1: the installation order of the centering bearing 809 and the thrust bearing 8010 within the rotating connecting sleeve 808 can be interchanged, and a lower cover plate 8021 is also installed at the bottom of the rotating connecting sleeve 808. This structural design facilitates installation and use.

[0031] In this embodiment, during installation, the centering bearing 809 and the thrust bearing 8010 can be easily installed into the rotating connecting sleeve 808. After installation, the centering bearing 809 can be positioned below and the thrust bearing 8010 above, or the centering bearing 809 can be positioned above and the thrust bearing 8010 below. Finally, the lower cover plate 8021 can prevent the bearings from falling off.

[0032] Example 5, as Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, this embodiment adds the following structure to the embodiment 1: the outer end of the locking cover 2 is also provided with an arc protrusion 201.

[0033] In this embodiment, by setting an arc protrusion 201 at the outer end of the locking cover 2, the contact friction between the cover and the connecting clamp 8016 is reduced, and the connecting clamp 8016 can be squeezed by the thread rotation, so that the valve core assembly can automatically disengage from the valve body 1 along the axial direction.

[0034] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A throttle valve disassembly and assembly auxiliary device with positioning function, comprising a valve body (1), a locking cover (2) connected to the valve body (1) by a thread, a connecting sleeve (3) installed inside the locking cover (2), a connecting flange (4) installed on the outside of the connecting sleeve (3), a valve sleeve (5) installed inside the connecting sleeve (3), the valve sleeve (5) installed inside the valve body (1), a valve stem (6) installed inside the valve sleeve (5), the valve stem (6) having a valve core (7) locked in place by a locking screw, and an auxiliary mechanism (8) installed on the top of the valve body (1), characterized in that: The auxiliary mechanism (8) includes two sets of supporting beams (801). Two sets of pulley groups (802) are slidably mounted on the supporting beams (801). A supporting connecting base plate (803) is installed at the bottom of the four sets of pulley groups (802). The supporting connecting base plate (803) is installed on the end face of one side of the valve body (1). Limiting pins (804) are installed on each of the four sets of pulley groups (802). The supporting beams (801) have pin holes (805) at the corresponding limiting pins (804). A limiting block (806) is installed on one side of the supporting beams (801), and a stabilizing block (807) is installed on the other side of the supporting beams (801). A rotating connecting sleeve (808) is also installed between the two sets of supporting beams (801). The rotating connecting sleeve (808) is located outside the stabilizing block (807). The rotating connecting sleeve (808) is equipped with a centering bearing (809) and a thrust bearing (8010). The centering bearing (809) and the thrust bearing (8010) are connected to a rotating connecting shaft (8011). A rotating positioning block (8012) is installed on the top of the rotating connecting shaft (8011). A top cover plate (8013) is installed on the top of the rotating connecting sleeve (808). The top cover plate (8013) is provided with four angle positioning holes (8014). A positioning screw (8015) is installed in one of the angle positioning holes (8014). The bottom of the positioning screw (8015) is locked onto the rotating positioning block (8012). A connecting clamp (8016) is threadedly connected to the lower side of the rotating connecting shaft (8011). The connecting clamp (8016) is installed on the connecting flange (4).

2. The throttle valve disassembly and assembly auxiliary device with positioning function according to claim 1, characterized in that: The pulley assembly (802) includes a pulley frame (8017), on which pulleys (8018) are installed on the upper and lower sides. The pulleys (8018) are nylon, non-metallic rollers, and bearings are provided inside the rollers. The support beam (801) is slidably disposed between the upper and lower pulleys (8018). The pulley frame (8017) is provided with a positioning hole (8019) between the upper and lower pulleys (8018). The limiting pin (804) is installed in the positioning hole (8019).

3. The throttle valve disassembly and assembly auxiliary device with positioning function according to claim 2, characterized in that: A positioning connecting screw (8020) is installed at the top center of the upper cover plate (8013). The bottom of the positioning connecting screw (8020) passes through the rotating positioning block (8012) and is locked on the rotating connecting shaft (8011). The four angle positioning holes (8014) are evenly arranged on the upper cover plate (8013) with the positioning connecting screw (8020) as the center, in the range of 0°-90°-180°-270°.

4. The throttle valve disassembly and assembly auxiliary device with positioning function according to claim 3, characterized in that: The installation order of the centering bearing (809) and the thrust bearing (8010) in the rotating connecting sleeve (808) can be changed, and a lower cover plate (8021) is also installed at the bottom of the rotating connecting sleeve (808).

5. The throttle valve disassembly and assembly auxiliary device with positioning function according to claim 4, characterized in that: The outer end of the locking cover (2) is also provided with an arc protrusion (201).

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