High-precision intelligent inching type electric control oil gas stop valve

Abstract

The invention relates to the technical field of stop valves, in particular to a high-precision intelligent inching type electric control oil gas stop valve which comprises a valve shell, a valve element is installed in the valve shell and movably arranged on the outer wall of a rotating lead screw in a sleeving mode through a guide structure, and a butt joint rod is clamped to the top end of the rotating lead screw through a positioning structure; the top end of the butt joint rod is used for being connected with a motor and driving the butt joint rod and the rotating lead screw to rotate, the monitoring part comprises a first fluted disc coaxially fixed to the outer wall of the rotating lead screw, the outer wall of the first fluted disc is meshed with a second fluted disc, and the second fluted disc is rotationally installed at the top end of the valve shell. In the process that the rotating lead screw rotates to drive the valve element to ascend and descend, through synchronous rotation between the first fluted disc and the second fluted disc, the monitoring plate synchronously ascends and descends along with the valve element, and the effect of indirectly observing the distance between the monitoring plate and the valve seat is achieved; the problem that a traditional valve depends on experience to be closed, and a sealing face is excessively abraded easily is solved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of stop valves, in particular to a high-precision intelligent point-driving electric control oil-gas stop valve. BACKGROUND

[0002] The high-precision intelligent point-driving electric control oil-gas stop valve is a new type of valve with precise control, which increases the opening and closing control precision through a screw rod and the like mechanical mechanism, adjusts the opening and closing of the valve through point-driving small incremental operation of manual control, and realizes electric control operation by taking a servo motor or a stepping motor as a core drive, and is more used in oil-gas pipeline transportation.

[0003] The stop valve is usually controlled by lifting the valve core through a motor or manually rotating the valve rod, and the opening and closing state of the stop valve is controlled by adjusting the distance between the valve core and the valve seat. However, since the valve core is in the valve, the operator cannot directly observe whether the valve core and the valve seat are completely attached to realize effective stop during the rotation of the valve rod. At present, the operator can only judge whether the valve is closed by continuously rotating the valve rod until it cannot be rotated. This operation mode is easy to cause the sealing surface of the valve core to bear excessive pressure of the valve seat, which not only affects the sealing reliability of the valve, but also significantly reduces the service life of the sealing surface of the valve core, increases the maintenance cost and potential leakage risk. SUMMARY

[0004] The application aims to provide a high-precision intelligent point-driving electric control oil-gas stop valve to solve the problem that the operator cannot observe the distance between the valve core and the valve seat during the rotation of the valve rod in the background technology.

[0005] To achieve the above-mentioned purpose, the application provides the following technical scheme: a high-precision intelligent point-driving electric control oil-gas stop valve, comprising: A valve housing is internally provided with a valve core, the valve core is movably sleeved on the outer wall of a rotating screw rod through a guide structure, the top end of the rotating screw rod is connected with a butt joint rod through a positioning structure, the top end of the butt joint rod is used for connecting a motor, and the butt joint rod and the rotating screw rod are driven to rotate; A monitoring member comprises a first tooth disc coaxially fixed on the outer wall of the rotating screw rod, the outer wall of the first tooth disc is engaged with a second tooth disc, and the second tooth disc is rotatably installed at the top end of the valve housing, the top end center position of the second tooth disc is coaxially fixed with a threaded column, a monitoring plate is movably sleeved on the threaded column, and the monitoring plate is used for monitoring the position of the valve core; A stand column penetrates through the monitoring plate and is fixed at the top end of the valve housing, and is used for limiting the monitoring plate to only vertically lift, and a balancing member is installed at the top end of the stand column; When the motor drives the butt joint rod to rotate clockwise, the positioning structure drives the rotating screw rod to rotate, and the valve core moves upward along the rotating screw rod, at this time, the first tooth disc, the second tooth disc and the threaded column rotate synchronously with the rotating screw rod, the monitoring plate on the outer wall of the threaded column moves vertically upward under the restriction of the stand column, and the interval between the monitoring plate and the valve housing is observed to detect the position of the valve core in the valve housing.

[0006] The balancing piece includes a lifting rod arranged on the top end of the stand column and capable of lifting movement, a horizontal plate fixedly arranged on the outer wall of the lifting rod, and an insertion rod capable of being connected to the threaded column through insertion and arranged on the horizontal plate to balance the lifting torque of the monitoring plate.

[0007] The top end of the threaded column is fixedly provided with a fixed plate, two connecting screw rods are symmetrically arranged on the fixed plate, and the bottom ends of the two connecting screw rods are connected to a limiting ring to limit the maximum vertical lifting height of the monitoring plate on the outer wall of the threaded column.

[0008] The outer wall of the stand column is fixedly provided with a first positioning ring, which is in the same horizontal plane as the top end of the second tooth disc, to assist in defining the axial position of the second tooth disc.

[0009] The outer wall of the rotating screw rod is fixedly provided with a first bevel gear, the first bevel gear is externally meshed with a second bevel gear, the second bevel gear is fixedly provided with a vertical shaft, the vertical shaft is rotatably arranged on the top end of the valve housing, and the top end of the second bevel gear is provided with a counting assembly.

[0010] The counting assembly includes a mounting frame fixedly arranged on the top end of the valve housing, the mounting frame locally extends above the second bevel gear, an installation cavity is arranged above the second bevel gear, the top end of the vertical shaft extends through the second bevel gear and into the installation cavity, a permanent magnet strip is fixedly arranged on the outer wall of the vertical shaft, and a counting member is fixedly arranged in the installation cavity and below the permanent magnet strip.

[0011] The counting member is made of a mechanical point press counter.

[0012] The positioning structure includes a positioning plug fixedly arranged on the bottom end of the butt joint rod, and the top end of the rotating screw rod is provided with a positioning slot matched with the rotating screw rod.

[0013] When the monitoring plate is attached to the top end of the second tooth disc, the valve core is tightly attached to the valve seat of one of the valve housing group structures.

[0014] The guide structure includes two limiting rods fixedly arranged in the valve housing, the two limiting rods both extend through the valve core and are flush with the bottom end of the rotating screw rod, and the valve core is limited to vertically move up and down outside the rotating screw rod.

[0015] Compared with the prior art, the present application has the beneficial effects that: The present application indirectly observes the distance between the monitoring plate and the valve seat by synchronously rotating the first toothed disc and the second toothed disc during the rotation of the rotating screw rod to drive the valve core to move up and down, thereby avoiding the problem of excessive wear of the sealing surface caused by the experience-based judgment of the traditional valve.

[0016] When the monitoring plate is attached to the top end of the second toothed disc, the valve core is closely attached to the valve seat, and the precise control of the valve core in the corresponding closed state is clear.

[0017] The permanent magnet strip contacts the semispherical tab during the rotation of the rotating screw rod, moves upward and counts, and is used to record the number of rotations of the rotating screw rod, so as to facilitate the staff to record the use amount of the stop valve and provide accurate data for regular maintenance and repair. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0019] Figure 2 It is a schematic diagram of the valve seat installation of the present application.

[0020] Figure 3 It is a schematic diagram of the first toothed disc installation of the present application.

[0021] Figure 4 It is a schematic diagram of the monitoring member structure of the present application.

[0022] Figure 5 It is a schematic diagram of the second toothed disc installation of the present application.

[0023] Figure 6 It is a schematic diagram of the docking rod installation of the present application.

[0024] Figure 7 It is a schematic diagram of the monitoring member structure of the present application.

[0025] Figure 8 It is a schematic diagram of the docking rod structure of the present application.

[0026] Figure 9 It is a schematic diagram of the counting member structure of the present application.

[0027] Figure 10 It is a schematic diagram of the fixed plate installation of the present application.

[0028] In the diagram: 1. Valve body; 2. Rotating screw; 3. Connecting rod; 4. Positioning block; 5. Adjusting screw; 6. First bevel gear; 7. Second bevel gear; 8. Vertical shaft; 9. Mounting bracket; 10. Counter; 11. Permanent magnet strip; 12. First gear plate; 13. Second gear plate; 14. Threaded column; 15. Monitoring plate; 16. Fixing plate; 17. Connecting screw; 18. Limiting ring; 19. Column; 20. First positioning ring; 21. Second positioning ring; 22. Lifting rod; 23. Horizontal plate; 24. Insert rod; 25. Valve core. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Please see Figures 1 to 10 This invention provides a technical solution: a high-precision intelligent inching type electrically controlled oil and gas shut-off valve, including a valve housing 1, a through hole on the valve housing 1, a rotating screw 2 rotatably mounted in the through hole via a bearing, and an axially through-flow fluid channel formed inside the valve housing 1, a valve seat welded and mounted in the channel, a valve core 25 for sealing attached to the valve seat, the valve core 25 being movably sleeved on the outer wall of the rotating screw 2 via a guide structure, the guide structure including two limiting rods (not shown in the figure) welded and fixed inside the valve housing 1, both limiting rods penetrating the valve core 25 and flush with the bottom end of the rotating screw 2, used to limit the valve core 25 to move only vertically up and down along the axial direction of the rotating screw 2, and a docking rod 3 being snapped into the top end of the rotating screw 2 via a positioning structure. The positioning structure includes a positioning block 4 welded and fixed to the bottom of the connecting rod 3 and a positioning slot adapted to it, located at the top of the rotating screw 2. An adjusting screw 5 is welded and fixed to the bottom of the positioning block 4, and the inner wall of the bottom of the positioning slot has an opening with a diameter at least five millimeters larger than the adjusting screw 5. This prevents the adjusting screw 5 from affecting the insertion of the positioning block 4 into the positioning slot. When disassembling the connecting rod 3 later, the connecting rod 3 can be moved by holding the adjusting screw 5, preventing the connecting rod 3 from being unable to be held firmly by one hand due to its large diameter, which could cause it to fall to the ground and be damaged. The top of the connecting rod 3 is used to connect a motor to drive the connecting rod 3 and the rotating screw 2 to rotate synchronously. The motor can be a Panasonic MINAS A6 series servo motor, one of its components being a 23-bit encoder. The connection method between the connecting rod 3 and the motor is the same as the connection method between the drive motor and the valve stem in traditional electric shut-off valves for high-pressure and high-temperature oil and gas pipelines. This is a common existing technology and will not be described in detail here.

[0031] The monitoring component includes a first geared disc 12 coaxially welded and fixed to the outer wall of the rotating screw 2. A second geared disc 13 meshes with the outer wall of the first geared disc 12. The second geared disc 13 is rotatably mounted on the top of the valve body 1 via a rotary bearing. A threaded post 14 is coaxially welded and fixed at the center of the top of the second geared disc 13. A monitoring plate 15 is movably sleeved on the threaded post 14. The inner wall of the monitoring plate 15 is provided with an internal thread adapted to the threaded post 14. The monitoring plate 15 is used to indirectly reflect the position of the valve core 25 in the valve body 1 through the vertical lifting displacement. When the monitoring plate 15 is in contact with the top of the second geared disc 13 (i.e., the monitoring plate 15 is in the initial position), the valve core 25 is tightly in contact with the valve seat in the valve body 1, realizing the valve in a fully closed state. During the rotation of the rotating screw 2, the lifting amplitude of the valve core 25 and the monitoring plate 15 is consistent.

[0032] The column 19 is welded and fixed to the top of the valve body 1 at its bottom end. The monitoring plate 15 has a guide hole adapted to it. The top of the column 19 passes through the guide hole of the monitoring plate 15. The guide hole is clearance-fitted with the outer wall of the column 19 to limit the monitoring plate 15 to only move vertically up and down along the axis of the column 19. The top of the column 19 is equipped with a balancing component.

[0033] When the motor drives the docking rod 3 to rotate clockwise, the positioning plug 4 and the positioning slot engage to drive the rotating screw 2 to rotate synchronously, causing the valve core 25 to move upward along the axis of the rotating screw 2. At this time, the first gear 12 is driven to rotate synchronously by the rotating screw 2, and through meshing, it drives the second gear 13 and the threaded column 14 to rotate synchronously. The monitoring plate 15 placed on the outer wall of the threaded column 14 is vertically raised and lowered in the opposite direction of the rotation of the threaded column 14 due to the vertical lifting restriction of the column 19 (when the threaded column 14 rotates, the monitoring plate 15 rises along its external thread). By observing the real-time change in the distance between the monitoring plate 15 and the top of the valve body 1, the vertical lifting position of the valve core 25 in the valve body 1 can be quantitatively detected.

[0034] The balancing component includes a lifting rod 22, a horizontal plate 23, and an insert rod 24. The top of the column 19 has an opening with the same diameter as the lifting rod 22. The lifting rod 22 is placed in the opening, and the opening has a built-in spring for pushing the lifting rod 22 to move vertically upward. The horizontal plate 23 is welded and fixed to the outer wall of the lifting rod 22. The insert rod 24 is fixed to the horizontal plate 23. The top of the threaded column 14 has an insert hole with the same diameter as the lifting rod 22, and the depth of the insert hole is the same as the depth of the opening on the column 19. That is, the lifting rod 22 is inserted into the column 19, and the insert rod 24 is inserted into the threaded column 14 to balance the lifting torque of the monitoring plate 15. This ensures that the monitoring plate 15 can only move vertically up and down due to the restriction of the column 19 during the rotation of the threaded column 14, and also prevents the column 19 from bending during long-term use.

[0035] A fixing plate 16 is welded and fixed to the top of the threaded column 14. Two connecting screws 17 are symmetrically arranged on the fixing plate 16. The bottom ends of the two connecting screws 17 are connected to a limit ring 18. The inner diameter of the limit ring 18 is larger than the outer diameter of the threaded column 14 and smaller than the outer diameter of the monitoring plate 15. It is used to limit the maximum vertical lifting height of the monitoring plate 15 on the outer wall of the threaded column 14. In the later debugging process, the height of the limit ring 18 can be adjusted by simultaneously turning the two connecting screws 17 according to the needs of use, thereby limiting the upward movement space of the valve core 25 and adjusting the maximum opening degree of the shut-off valve.

[0036] A first positioning ring 20 is welded and fixed to the outer wall of the column 19. It is at the same level as the top of the second gear plate 13 and is used to help limit the axial position of the second gear plate 13. A second positioning ring 21 is movably fitted on the outer wall of the column 19. The second positioning ring 21 is a hollow structure with several bells inside. During use, the second positioning ring 21 is movably attached to the top of the monitoring plate 15 and moves up and down synchronously with it. During the up and down movement, the bells vibrate due to the displacement and make a sound, indicating to the staff that the shut-off valve is in working condition and to pay attention to observation.

[0037] A first bevel gear 6 is welded and fixed to the outer wall of the rotating screw 2. A second bevel gear 7 meshes with the first bevel gear 6. A vertical shaft 8 is welded and fixed to the second bevel gear 7. The bottom end of the vertical shaft 8 is rotatably mounted to the top of the valve body 1 through a rotary bearing. A counting component is provided at the top of the second bevel gear 7.

[0038] The counting assembly includes a mounting bracket 9 welded and fixed to the top of the valve body 1. The mounting bracket 9 extends partially above the second bevel gear 7, and a mounting cavity is formed in the part of the bracket extending above the second bevel gear 7. The top of the vertical shaft 8 passes through the second bevel gear 7 and extends into the mounting cavity. A counting element 10 is glued and fixed inside the mounting cavity, and a permanent magnet strip 11 is located below the counting element 10. The counting element 10 is made of a mechanical push-button counter, which is a common existing technology. The bottom end of the push-button of the mechanical push-button counter is set as a hemispherical shape, and the hemispherical part is on the rotation path of the permanent magnet strip 11. During use, the permanent magnet strip 11 contacts the hemispherical push-button during rotation, causing it to move upward and count, which is used to record the number of rotations of the rotating screw 2. This facilitates the staff to record the usage of the shut-off valve and provides accurate data for regular maintenance.

[0039] In use, the invention starts the motor with an external power source. As the motor drives the connecting rod 3 and the rotating screw 2 to rotate clockwise, the valve core 25 moves vertically upwards, disengaging from the valve seat and opening the shut-off valve. During the rotation of the rotating screw 2, the first bevel gear 6 rotates synchronously, driving the meshing second bevel gear 7 to rotate. The vertical shaft 8 and permanent magnet strip 11 on the second bevel gear 7 rotate synchronously. The permanent magnet strip 11 triggers the counting element 10, which records the number of rotations of the rotating screw 2. At this time, the first gear disc 12 drives the meshing second gear disc 13 to rotate. The second gear disc 13... During the rotation of the threaded column 14, the monitoring plate 15 fitted on its outer wall is restricted by the column 19 to move vertically upward. That is, during the vertical upward movement of the valve core 25, the monitoring plate 15 moves upward synchronously. By observing the distance between the monitoring plate 15 and the second toothed disc 13, the distance between the valve core 25 and the valve seat can be determined, thus controlling the opening and closing degree of the shut-off valve. When closing the shut-off valve, the rotating screw 2 rotates counterclockwise until the monitoring plate 15 is in contact with the top of the second toothed disc 13. At this time, the valve core 25 is in contact with the valve seat, avoiding excessive pressure on the sealing surface of the valve core 25, which could lead to damage.

[0040] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-precision intelligent inching type electrically controlled oil and gas shut-off valve, characterized in that, include: The valve body has a valve core installed inside. The valve core is movably sleeved on the outer wall of the rotating screw through a guide structure. The top end of the rotating screw is engaged with a docking rod through a positioning structure. The top end of the docking rod is used to connect a motor to drive the docking rod and the rotating screw to rotate. The monitoring component includes a first toothed disc coaxially fixed to the outer wall of the rotating lead screw, a second toothed disc meshing with the outer wall of the first toothed disc, and the second toothed disc rotatably mounted on the top of the valve body. A threaded post is coaxially fixed at the center of the top of the second toothed disc, and a monitoring plate is movably sleeved on the threaded post. The monitoring plate is used to monitor the position of the valve core. A column, which penetrates the monitoring plate and is fixed to the top of the valve body, is used to restrict the monitoring plate to only vertically rising and falling. A balancing component is installed at the top of the column. When the motor drives the docking rod to rotate clockwise, the positioning structure drives the rotating screw to rotate, causing the valve core to move upward along the axis of the rotating screw. At this time, the first toothed disc, the second toothed disc, and the threaded column rotate synchronously with the rotating screw. The monitoring plate placed on the outer wall of the threaded column moves vertically upward due to the restriction of the column. The position of the valve core inside the valve body is detected by observing the distance between the monitoring plate and the valve body.

2. The high-precision intelligent jog-type electro-controlled oil and gas shut-off valve according to claim 1, characterized in that: The balancing component includes a lifting rod that is positioned at the top of the column and can move up and down. A horizontal plate is fixedly sleeved on the outside of the lifting rod, and an insert rod that can be inserted and connected to the threaded column is fixed on the horizontal plate to balance the lifting torque of the detection plate.

3. The high-precision intelligent jog-type electro-controlled oil and gas shut-off valve according to claim 1, characterized in that: A fixing plate is fixed to the top of the threaded column, and two connecting screws are symmetrically arranged on the fixing plate. The bottom ends of the two connecting screws are connected to a limit ring to limit the maximum vertical lifting height of the monitoring plate on the outer wall of the threaded column.

4. The high-precision intelligent jog-type electro-controlled oil and gas shut-off valve according to claim 1, characterized in that: A first positioning ring is fixed on the outer wall of the column, which is at the same horizontal plane as the top of the second gear disk, and is used to help limit the axial position of the second gear disk.

5. A high-precision intelligent jog-type electro-controlled oil and gas shut-off valve according to claim 1, characterized in that: A first bevel gear is fixed on the outer wall of the rotating lead screw. A second bevel gear meshes with the first bevel gear. A vertical shaft is fixed on the second bevel gear, and the vertical shaft is rotatably mounted on the top of the valve housing. A counting component is provided at the top of the second bevel gear.

6. A high-precision intelligent jog-type electro-controlled oil and gas shut-off valve according to claim 5, characterized in that: The counting assembly includes a mounting bracket fixed to the top of the valve housing. The mounting bracket extends partially above the second bevel gear, and a mounting cavity is formed in the portion extending above the second bevel gear. The top of the vertical shaft passes through the second bevel gear and extends into the mounting cavity. A permanent magnet strip is fixed on its outer wall. A counting element is fixed inside the mounting cavity, and the permanent magnet strip is located below the counting element.

7. A high-precision intelligent jog-type electrically controlled oil and gas shut-off valve according to claim 6, characterized in that: The counter is made using a mechanical point-and-click counter.

8. A high-precision intelligent jog-type electro-controlled oil and gas shut-off valve according to claim 1, characterized in that: The positioning structure includes a positioning block fixed to the bottom end of the docking rod, and a positioning slot adapted to the top end of the rotating lead screw.

9. A high-precision intelligent jog-type electrically controlled oil and gas shut-off valve according to claim 1, characterized in that: When the monitoring plate is attached to the top of the second toothed disc, the valve core is tightly attached to the valve seat, which is one of the components of the valve body.

10. A high-precision intelligent jog-type electro-controlled oil and gas shut-off valve according to claim 1, characterized in that: The guide structure includes two limiting rods fixed inside the valve body. Both limiting rods pass through the valve core and are flush with the bottom end of the rotating screw, which are used to restrict the vertical lifting and lowering movement of the valve core outside the rotating screw.

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