Device for automatically replacing fixed throttle valve oil nozzle

Abstract

The invention provides a device for automatically replacing a fixed throttling valve oil nozzle. The device comprises a sealing mechanism, a rotating mechanism, a lifting mechanism and a guide mechanism which are detachably arranged at the top of a valve body. The sealing mechanism provides a stable working environment for the rotating mechanism, the lifting mechanism and the guide mechanism; the rotating mechanism comprises a supporting frame, a worm is rotatably arranged at the bottom of the supporting frame, a worm gear is connected to the worm in a meshed mode and arranged on a union nut in a sleeving mode, the union nut is in threaded connection with the valve body, and the valve rod and the oil nozzle assembly are arranged on the lower side of the union nut. The lifting mechanism comprises a rack arranged in the sealing mechanism, a lead screw is rotatably arranged on the rack, and the lead screw is used for driving the supporting frame to move in the height direction, so that a valve rod and an oil nozzle assembly on the lower side of the union nut are driven to ascend and move out of the valve body; the guide mechanism comprises guide pins symmetrically arranged on the rack, and the guide pins are connected with the lower portion of the supporting frame in an inserted mode. The structure is compact, the replacement efficiency of the throttle valve oil nozzle assembly is improved, and operation is convenient.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical tools, and in particular to a device for automatically replacing a fixed throttle valve nozzle. Background Art

[0002] The fixed throttle valve is a key device for throttling control. It controls and regulates production by replacing nozzles of different sizes and adjusting the throttling path. However, during long-term use, the nozzles are prone to wear, blockage, and even falling off, which will seriously affect the normal production of the oil well. Therefore, it is necessary to inspect and replace the nozzles to ensure the normal and safe production of the oil well. At present, the replacement of nozzles is generally done manually. The operation of dismantling the union and lifting the nozzle by using wrenches, clamps and other tools to check and replace the nozzle is time-consuming and labor-intensive, and there are certain safety hazards. In addition, the fixed throttle valve is used in a narrow space, which is not convenient for manual operation.

[0003] Chinese patent document CN 219967799 U records a throttle valve nozzle disassembly device, which is manually operated, inconvenient to operate and low in efficiency; Chinese patent document CN 212096174 U records a fixed throttle valve nozzle pick-up and delivery tool, which also has the above problems, is inconvenient to use, and needs to be improved. Summary of the invention

[0004] The invention provides a device for automatically replacing the oil nozzle of a fixed throttle valve, which solves the problems of inconvenient replacement of the internal oil nozzle of the fixed throttle valve, low efficiency, time-consuming and labor-intensive replacement.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a device for automatically replacing a fixed throttle valve nozzle, comprising a sealing mechanism, a rotating mechanism, a lifting mechanism and a guiding mechanism detachably arranged on the top of a valve body; The sealing mechanism provides a stable working environment for the rotating mechanism, lifting mechanism and guiding mechanism; The rotating mechanism includes a support frame, a worm is rotatably provided at the bottom of the support frame, a worm wheel is meshingly connected to the worm, the worm wheel is sleeved on a union nut, the union nut is threadedly connected to the valve body, and the valve stem and the oil nozzle assembly are arranged on the lower side of the union nut; The lifting mechanism includes a frame arranged in the sealing mechanism, and a lead screw is rotatably provided on the frame, and the lead screw is used to drive the support frame to move in the height direction, thereby driving the valve stem and the oil nozzle assembly on the lower side of the union nut to rise and move out of the valve body; The guiding mechanism comprises guiding pins which are symmetrically arranged on the frame, and the guiding pins are plugged into the lower part of the supporting frame.

[0006] In a preferred embodiment, the sealing mechanism includes a first side plate, a front plate and a second side plate circumferentially arranged on the outside of the frame, the coupling, the first side plate, the front plate and the second side plate are connected to the frame by screws, and the lower part of the frame is fixed by bolts and the valve body.

[0007] In a preferred solution, the support frame includes a connecting portion and a top plate, the worm is inserted into the top plate, a second motor is provided at the end of the worm, and the middle portion of the support frame is connected via a gland and a union nut.

[0008] In the preferred scheme, a mounting surface is provided on the top of the union nut, a reverse hook groove is provided on the inner side of the mounting surface, a reverse hook ring plate is provided in the middle of the support frame, the reverse hook ring plate is located in the reverse hook groove, a stop ring is provided on the lower part of the pressure cover, the bottom of the stop ring abuts against the top of the reverse hook ring plate, the two sides of the fastening nail abut between the reverse hook groove and the reverse hook ring plate respectively, and the stop ring is fixed by the fastening nail and the mounting surface.

[0009] In the preferred scheme, an annular groove and a convex ring are provided on the outer side of the union nut, the outer diameter of the annular groove is larger than the inner diameter of the worm wheel, a straight groove is provided between the annular groove and the convex ring, a mounting groove is provided on the inner side of the worm wheel, a flat key is inserted in the straight groove and the mounting groove, a detachable wire clamp is provided in the annular groove, the top and lower part of the worm wheel respectively abut against the bottom surface of the wire clamp and the top surface of the convex ring, the lower side of the straight groove is connected to the straight groove, and a partition is provided between the upper side of the straight groove and the annular groove.

[0010] In the preferred scheme, the top of the screw is connected to the first motor through a coupling, the first motor is fixed through the first fixed seat and the frame, the lower part of the screw is connected to the frame through the third fixed seat, the lower part of the screw is also sleeved with a first bearing and a retaining spring, the screw is threaded with a screw nut, the screw nut is connected to the support frame through a stroke adjustment assembly, and two guide shafts are also arranged in parallel on one side of the screw, and the guide shafts are connected to the frame through a fourth fixed seat.

[0011] In the preferred scheme, a second fixing hole is provided on the top of the support frame, and the stroke adjustment assembly includes a lap plate, one side of the lap plate is fixed to the bottom of the screw nut, and the other side of the lap plate is provided with a first fixing hole, a round rod is passed through the first fixing hole, and an adjustment ring is provided on the upper part of the round rod, the adjustment ring is connected to the round rod through a locking pin, the locking pin and the round rod are threadedly connected, and the lower locking pin is passed through the second fixing hole.

[0012] In the preferred solution, a straight plate is provided at the bottom of the support frame, alignment holes are provided on the straight plate and the connecting part, the guide pin and the alignment hole are plugged in, a plurality of operating holes are provided circumferentially in the middle of the top plate, the lower part of the union nut is connected to the valve stem through a plug and a flange, and the union nut is pressed onto the top of the plug.

[0013] In the preferred solution, the worm is sequentially sleeved with a second bearing and an oil seal along the direction of the axis close to the second motor, the second motor is connected to the support frame through a second fixed seat, a bearing seat is sleeved on the outside of the second bearing and the oil seal, and the worm is sleeved with a third bearing and a retaining spring along the direction of the axis away from the second motor.

[0014] The preferred scheme also includes a bracket, one side of the bracket is connected to the support frame, the bracket and the frame are slidably connected, the inner side of the frame is provided with a slide groove, the inner side of the connecting part is provided with two lock holes in parallel, the bracket includes a lifting ring, the lifting ring is sleeved on the outside of the union nut, one side of the lifting ring is connected to an extension plate through a reinforcing plate, the extension plate is provided with an insertion rod, the insertion rod and the lock hole are plugged into, the other side of the lifting ring is provided with a contact plate, the end of the contact plate is provided with a contact head, the upper and lower sides of the contact head are provided with rounded corners, and a plurality of countersunk holes are also provided along the circumference of the lifting ring, a spring is provided in the countersunk hole, and the top of the spring rests on the lower side of the worm gear.

[0015] The beneficial effects of the present invention are as follows: the present invention can complete the task requirements of automatically disassembling and installing the union nut, and automatically lifting and installing the oil nozzle. The double guide pin structure is adopted to ensure that the union nut threads are correctly buckled during the installation process. The present invention has a small overall volume and can be adapted to work in a narrow space environment, greatly reducing the degree of manual participation in the process of checking or replacing the oil nozzle, improving the work efficiency, and reducing the possibility of safety accidents.

[0016] The sealing mechanism ensures that the working environment is relatively stable and dust-proof; the rotating mechanism can better loosen the union nut from the valve body through the meshing cooperation of the worm gear, and then lift the union nut, valve stem and oil nozzle to the designed position through the lifting mechanism until the oil nozzle is fully exposed, so as to realize manual maintenance and replacement; when the replaced oil nozzle assembly is re-installed through the valve stem and the union nut is lowered, the guiding mechanism ensures that the support frame of the rotating mechanism is aligned with the frame during the falling process, and then the union nut is tightened stably and accurately, so as to complete the efficient installation of the valve stem and oil nozzle assembly into the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments: Figure 1 It is a schematic diagram of the overall structure of the present invention when in use; Figure 2 yes Figure 1 Schematic diagram of the internal structure; Figure 3 It is a schematic diagram of the lifting mechanism structure of the present invention; Figure 4 The rotating mechanism structure of the present invention is schematically shown in FIG. Figure 1 ; Figure 5 The rotating mechanism structure of the present invention is schematically shown in FIG. Figure 2 ; Figure 6 The rotating mechanism structure of the present invention is schematically shown in FIG. Figure 3 ; Figure 7 yes Figure 4 Schematic diagram of the working process; Figure 8 The valve body explosion structure corresponding to the present invention is shown in FIG. Figure 1 ; Fig. 9 The valve body explosion structure corresponding to the present invention is shown in FIG. Figure 2 ; Fig.10 yes Figure 1 Schematic diagram of the explosion structure Figure 1 ; Fig.11 yes Figure 1 Schematic diagram of the explosion structure Figure 2 ; Fig.12 yes Figure 1 Schematic diagram of the explosion structure Figure 3 ; Fig.13 The internal structure of the rotating mechanism, lifting mechanism and guiding mechanism of the present invention when working is shown in FIG. Figure 1 ; Fig.14 The internal structure of the rotating mechanism, lifting mechanism and guiding mechanism of the present invention when working is shown in FIG. Figure 2 ; Fig.15 It is a schematic diagram of the structure of the rotating mechanism mounting bracket of the present invention; Fig.16 yes Fig.15 Schematic diagram of the explosion structure Figure 1 ; Fig.17 yes Fig.15 Schematic diagram of the explosion structure Figure 2 ; Fig.18 yes Fig.15 Schematic diagram of the bracket mechanism.

[0018] In the figure: first motor 1; first fixed seat 2; coupling 3; first side plate 4; second fixed seat 5; second motor 6; valve body 7; front plate 8; second side plate 9; lead screw 10; lead screw nut 11; stroke adjustment assembly 12; lap plate 1201; first fixing hole 1202; round rod 1203; adjustment ring 1204; locking pin 1205; support frame 13; connecting part 1301; top plate 1302; operating hole 1303; straight plate 1304; alignment hole 1305; second fixing hole 1306; reverse hook ring plate 1307; locking hole 1308; third fixed seat 14; frame 15; slide groove 1501; fourth fixed seat 16; guide shaft 17; worm gear 18; mounting groove 1801; pressure cover 19; stop ring 1901; fastening nail 1902; union nut 20; mounting surface 2001; straight groove 2002; convex ring 2003; annular groove 2004; partition 2005; reverse hook groove 2006; wire clamp ring 21; plug 22; flange 23; valve stem 24; oil nozzle assembly 25; first bearing 26; first retaining spring 27; guide pin 28; flat key 29; oil seal 30; bearing seat 31; second bearing 32; worm 33; second retaining spring 34; third bearing 35; bracket 36. DETAILED DESCRIPTION

[0019] like Figure 1-6 In the invention, a device for automatically replacing a fixed throttle valve nozzle comprises a sealing mechanism, a rotating mechanism, a lifting mechanism and a guiding mechanism which are detachably arranged on the top of a valve body 7; The sealing mechanism provides a stable working environment for the rotating mechanism, lifting mechanism and guiding mechanism; The rotating mechanism includes a support frame 13, a worm 33 is rotatably provided at the bottom of the support frame 13, a worm wheel 18 is meshedly connected to the worm 33, the worm wheel 18 is sleeved on a union nut 20, the union nut 20 is threadedly connected to the valve body 7, and a valve stem 24 and an oil nozzle assembly 25 are arranged on the lower side of the union nut 20; The lifting mechanism includes a frame 15 disposed in the sealing mechanism, and a lead screw 10 is rotatably disposed on the frame 15, and the lead screw 10 is used to drive the support frame 13 to move in the height direction, thereby driving the valve stem 24 and the oil nozzle assembly 25 on the lower side of the union nut 20 to rise and move out of the valve body 7; The guiding mechanism includes guiding pins 28 symmetrically arranged on the frame 15 , and the guiding pins 28 are plugged into the lower part of the support frame 13 .

[0020] The second motor 6 drives the worm wheel 18 to rotate by rotating the worm 33, providing a large torque, and then drives the union nut 20 to rotate until the union nut 20 is loosened. The lead screw 10 on the lifting mechanism drives the valve stem 24 and the nozzle assembly 25 to be lifted by the union nut 20 until the valve stem 24 and the nozzle assembly are completely separated from the valve body 7. Then, the inspection or maintenance and replacement of the nozzle assembly 25 is completed manually. The installation process is the opposite of the disassembly process. The lead screw 10 is used again to put the valve stem 24 and the nozzle assembly 25 into the valve body 7. Since this process may be caused by the second motor 6 and the worm 33 is located on one side of the support frame 13, causing unbalanced load and overall center of gravity shift. The two guide pins 28 arranged on the guide mechanism are aligned with the alignment holes 1305 on the support frame 13 from the bottom to receive and correct the support frame 13 until the support frame 13 falls to the bottom on the frame 15, ensuring the high accuracy of repeated positioning of the support frame 13 during the lifting process. The good effect also avoids the problem that the support frame 13 fails to return to its original position due to deviation in the landing position and the installation cannot be carried out. The rotating mechanism rotates in the opposite direction, and the worm gear 18 is used to tighten the union nut 20 to complete the installation of the valve stem 24 and the nozzle assembly 25.

[0021] In a preferred embodiment, the sealing mechanism includes a first side plate 4, a front plate 8 and a second side plate 9 which are circumferentially arranged on the outside of the frame 15. The coupling 3, the first side plate 4, the front plate 8 and the second side plate 9 are connected to the frame 15 by screws, and the lower part of the frame 15 is fixed by bolts and the valve body 7.

[0022] Due to the limited use space, the design needs to meet the space requirements and also needs to be dust-proof. Therefore, the first side panel 4, the front panel 8 and the second side panel 9 cooperate with the frame 15 to achieve overall enclosure. At the same time, the first side panel 4 and the front panel 8 are provided with openings to avoid the second motor 6. The opening also serves as a window for manual observation to monitor the installation and removal process of the nozzle assembly 25. The second side panel 9 and the front panel 8 are fully enclosed to prevent the entry of external dust.

[0023] In a preferred embodiment, the support frame 13 includes a connecting portion 1301 and a top plate 1302 , the worm 33 is inserted into the top plate 1302 , a second motor 6 is provided at the end of the worm 33 , and the middle portion of the support frame 13 is connected via a gland 19 and a union nut 20 .

[0024] The second motor 6 is arranged outside the support frame 13, avoiding the occupation of the internal space of the frame 15. The overall structure is compact, ensuring the stability and efficiency of the working process. The gland 19 serves as a transition component, ensuring that the union nut 20 follows the support frame 13 to adjust the height and realize the following action.

[0025] like Figure 7In the preferred embodiment, a mounting surface 2001 is provided on the top of the union nut 20, a reverse hook groove 2006 is provided on the inner side of the mounting surface 2001, a reverse hook ring plate 1307 is provided in the middle of the support frame 13, the reverse hook ring plate 1307 is located in the reverse hook groove 2006, a stop ring 1901 is provided on the lower part of the pressure cover 19, the bottom of the stop ring 1901 abuts against the top of the reverse hook ring plate 1307, both sides of the fastening nail 1902 abut between the reverse hook groove 2006 and the reverse hook ring plate 1307, and the stop ring 1901 is fixed by the fastening nail 1902 and the mounting surface 2001.

[0026] The bottom end surface of the reverse hook ring plate 1307 and the upper outer end surface of the reverse hook groove 2006 are roughly flush, which ensures the convenience of installation. The union nut 20 can be directly aligned from the reverse hook ring plate 1307 of the support frame 13, and the bottom surface of the reverse hook ring plate 1307 is fitted to the bottom surface of the reverse hook groove 2006. At this point, a gap is formed between the reverse hook groove 2006 and the reverse hook ring plate 1307, and the gap is just filled by the stop ring 1901 at the bottom of the pressure cover 19 to complete the fit and locking of the reverse hook ring plate 1307 and the stop ring 1901. The gap is inserted into the gap, and then the union nut 20 is connected by the fastening nail 1902. The reverse hanging of the union nut 20 is realized through the above steps, and the installation precision is high and the effect is good. The whole process is assisted by the pressure cover 19, so that the support frame 13 and the union nut 20 are firmly connected and the connection is stable.

[0027] like Figure 10-14 In the preferred embodiment, an annular groove 2004 and a convex ring 2003 are provided on the outer side of the union nut 20, the outer diameter of the annular groove 2004 is larger than the inner diameter of the worm wheel 18, a straight groove 2002 is provided between the annular groove 2004 and the convex ring 2003, a mounting groove 1801 is provided on the inner side of the worm wheel 18, a flat key 29 is inserted into the straight groove 2002 and the mounting groove 1801, a wire clamp 21 is detachably provided in the annular groove 2004, the top and the lower part of the worm wheel 18 respectively abut against the bottom surface of the wire clamp 21 and the top surface of the convex ring 2003, the lower side of the straight groove 2002 is connected to the straight groove 2002, and a partition 2005 is provided between the upper side of the straight groove 2002 and the annular groove 2004.

[0028] The worm gear 18 transmits the torque from the second motor 6 to the union nut 20 by means of the flat key 29 for stable torque transmission. Since the cooperation between the worm gear 18 and the worm 33 can achieve a larger torque, the screwing action of the union nut 20 can be easily achieved. During the entire working process, the worm gear 33 and the worm gear 18 always maintain a correct meshing state.

[0029] In the preferred scheme, the top of the screw 10 is connected to the first motor 1 through the coupling 3, the first motor 1 is fixed through the first fixed seat 2 and the frame 15, the lower part of the screw 10 is connected to the frame 15 through the third fixed seat 14, the lower part of the screw 10 is also sleeved with a first bearing 26 and a first retaining spring 27, the screw 10 is threadedly connected with a screw nut 11, the screw nut 11 is connected to the support frame 13 through the stroke adjustment assembly 12, and two guide shafts 17 are also arranged in parallel on one side of the screw 10, and the guide shaft 17 is connected to the frame 15 through a fourth fixed seat 16.

[0030] One end of the lead screw 10 is axially fixed by the coupling 3, and the other end is axially fixed to the third fixed seat 14 by the first bearing 26 and the first retaining spring 27 for the shaft. The first bearing 26 adopts a deep groove ball bearing, and the third fixed seat 14 is fixedly connected to the frame 15 by bolts. The lead screw nut 11 is limited to move up and down within the range of the stroke adjustment component 12 and the support frame 13. The stroke adjustment component 12 is fixed to the support frame 13 by screws passing through the second fixing hole. The guide shaft 17 passes through the support frame 13 and is fixed to the fourth fixed seat 16, and is locked by bolts. The fourth fixed seat 16 has an adjustable gap to facilitate the installation of the guide shaft 17. The fourth fixed seat 16 is fixedly connected to the frame 15 by bolts. The overall locking effect is good and the rigidity is strong.

[0031] In the preferred embodiment, a second fixing hole 1306 is provided on the top of the support frame 13, and the stroke adjustment assembly 12 includes a lap plate 1201, one side of the lap plate 1201 is fixed to the bottom of the screw nut 11, and the other side of the lap plate 1201 is provided with a first fixing hole 1202, a round rod 1203 is passed through the first fixing hole 1202, and an adjustment ring 1204 is provided on the upper part of the round rod 1203, the adjustment ring 1204 is connected to the round rod 1203 through a locking pin 1205, the locking pin 1205 and the round rod 1203 are threadedly connected, and the lower locking pin 1205 is passed through the second fixing hole 1306.

[0032] The frame 15 is fixedly connected to the valve body 7 by bolts. The first motor 1 drives the lead screw 10 to rotate, and the lead screw nut 11 rises and drives the support frame 13 to rise until the nozzle assembly 25 is lifted to a height that meets the inspection or replacement operation requirements, and stops. After the operation is completed, the nozzle assembly 25 is installed by reverse stroke. Since the rise of the union nut 20 is divided into two stages, the first stage is achieved by the thread, and the second stage is lifted by the lead screw nut 11 and the guide shaft 17. In the first stage, as the union nut 20 rises, the support frame 13 rises accordingly. At this time, the lead screw nut 11 also needs to rise synchronously to avoid the problem that the lead screw nut 11 rises and drives the lead screw 10 to rotate, causing the first motor 1 to be forced to rotate. Therefore, the formation adjustment component 12 of the present scheme can provide a stable adjustable range between the height of the union nut 20 rising in the first stage and the height of the lead screw nut 11 rising, avoiding the problem of mutual interference and pushing.

[0033] In the preferred embodiment, a straight plate 1304 is provided at the bottom of the support frame 13, and alignment holes 1305 are provided on the straight plate 1304 and the connecting part 1301, the guide pin 28 and the alignment hole 1305 are plugged in, and a plurality of operating holes 1303 are provided in the circumferential direction in the middle part of the top plate 1302, and the lower part of the union nut 20 is connected to the valve stem 24 through the plug 22 and the flange 23, and the union nut 20 is pressed on the top of the plug 22.

[0034] During the process of the support frame 13 rising and falling, the overall installation accuracy needs to be guaranteed by the support member 13, so the guide pin 28 realizes accurate alignment. In the initial state, the guide pin 28 is inserted in the alignment hole 1305. When the lifting mechanism moves in the reverse stroke, the support frame 13 descends to the point where the union nut 20 is about to contact the thread of the valve body 7, the guide pin 28 begins to cooperate with the alignment hole 1305 on the support frame 13 for guidance, ensuring that the threaded threads can fit perfectly, with high repeated positioning accuracy and smooth movement.

[0035] like Figure 8-9 , is a schematic diagram of the structure of the valve body 7 in the present scheme, wherein the plug 22 and the union nut 20 are fixedly connected, and the nozzle assembly 25 is connected to the plug 22 through the valve stem 24 and the flange 23, so that the union nut 20 can drive the valve stem 24 and the nozzle assembly 25 to move synchronously, and the valve stem 24 and the nozzle assembly 25 can be removed by loosening and lifting the union nut 20. The process is convenient and the effect is good. At the same time, the reverse process of disassembly at the installation position ensures high installation accuracy, avoiding the problem of the valve stem 24 and the nozzle assembly 25 being out of alignment with the center of the valve body 7 during installation, resulting in stagnation or damage, which affects the subsequent smooth operation of the valve body 7.

[0036] In the preferred solution, the worm 33 is sequentially sleeved with a first bearing 32 and an oil seal 30 along the axis direction close to the second motor 6, the second motor 6 is connected to the support frame 13 through the second fixed seat 5, a bearing seat 31 is sleeved on the outside of the first bearing 32 and the oil seal 30, and the worm 33 is sleeved with a second bearing 35 and a retaining spring 34 along the axis direction away from the second motor 6.

[0037] The second bearing 32 and the third bearing 25 are both deep groove ball bearings, wherein the third bearing 35 is installed on the left side of the worm 33 in conjunction with the retaining spring 34, and the second bearing 32 and the oil seal 30 are installed on the right side of the worm 33. At the same time, the outer sleeve of the second bearing 32 and the oil seal 30 is provided with a bearing seat 31, and slots corresponding to the second bearing 32 and the bearing seat 31 are provided on the support frame 13. The retaining spring 34 fixes the worm 33 axially to avoid the problem of circumferential movement.

[0038] like Figure 15-18In the preferred embodiment, the bracket 36 is also included, one side of the bracket 36 is connected to the support frame 13, the bracket 36 is slidably connected to the frame 15, the inner side of the frame 15 is provided with a slide groove 1501, the inner side of the connecting portion 1301 is provided with two lock holes 1308 in parallel, the bracket 36 includes a lifting ring 3609, the lifting ring 3609 is sleeved on the outer side of the union nut 20, one side of the lifting ring 3609 is connected to the extension plate 3602 through the reinforcing plate 3601, and the outer An insertion rod 3603 is provided on the extension plate 3602, and the insertion rod 3603 is plugged into the lock hole 1308. A contact plate 3604 is provided on the other side of the lifting ring, and a contact head 3605 is provided at the end of the contact plate 3604. The upper and lower sides of the contact head 3605 are provided with rounded corners 3606. A plurality of countersunk holes 3607 are also provided along the circumference of the lifting ring 3609, and a spring 3608 is provided in the countersunk hole 3607. The top of the spring 3608 rests against the lower side of the worm gear 18.

[0039] Since the worm 33 on the support member 13 will cause the problem of overall eccentric load, there is a certain deviation in the center of gravity. At this time, the bracket 36 set at the bottom of the support member 13 forms a relative support between the bottom and the frame 15, and the contact head 3605 on the contact plate 3604 at the top of the bracket 36 is aligned with the slide groove 1501 to achieve alignment. When the support member 13 moves up and down, the contact head 3605 can correct the deviation of the worm 33 through the slide groove 1501. At the same time, the spring 3608 on the lifting ring 3609 at the bottom of the bracket 36 aligns the worm again from the bottom. The wheel 18 is supported, and the convex ring 2003 is further used to lock the worm wheel 18 from the bottom. Since a wire clamping ring 21 is provided in the annular groove 2003, the worm wheel 18 and the union nut 20 can be locked for a second time, and the locking effect is better, that is, the bracket 36 can correct the unbalanced load problem caused by the weight of the worm 33 when the support frame 13 is separated from the guide pin 28, and at the same time, it can also improve the fixing effect of the worm wheel 18 and the union nut 20, thereby ensuring the convenience of use, and also playing a buffering role on the pressure cover 19, thereby ensuring a long overall service life and good effect.

[0040] The specific working process is as follows: the second motor 6 drives the worm 33 to rotate, amplifies the torque through the worm gear 18, and uses the flat key 29 to transmit the torque to loosen the union nut 20, and then lifts it upward in the threaded cooperation between the union nut 20 and the valve body 7. At this time, the first motor 1 drives the lead screw 10 to rotate, driving the lead screw nut 11 to rise synchronously; when the thread ends (that is, the union nut 20 is completely separated from the valve body 7), the second motor 6 stops rotating, and the first motor 1 speeds up the rotation speed to lift the rotating mechanism upward until the nozzle assembly 25 is lifted to a height that meets the inspection or replacement operation. After the inspection or replacement operation is completed manually, the first motor 1 moves in the reverse stroke to lift the nozzle assembly 25 and the union nut 20. The nut 20 is installed in reverse; when the height is lowered to the point where the threads are about to touch, the guide pin 28 starts to cooperate with the alignment hole 1305 of the support frame 13 for guidance to ensure that the threaded thread fits perfectly; the height continues to be lowered until the threads of the nut 20 start to contact the valve body 7, the second motor 6 drives the worm 33 to rotate in the opposite direction, and the moving speed of the first motor 1 is adjusted to work synchronously with the second motor 6. The lead screw 10 continues to drive the support frame 13 to descend until the nut 20 is installed, that is, the nozzle assembly 25 is installed. Both the first motor 1 and the second motor 6 use servo motors to ensure efficient control and accurate synchronization, and are smoother during operation, avoiding problems such as jitter and step loss.

[0041] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limiting the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A device for automatically replacing a fixed throttle valve nozzle, characterized in that: It comprises a sealing mechanism, a rotating mechanism, a lifting mechanism and a guiding mechanism which are detachably arranged on the top of the valve body (7); The sealing mechanism provides a stable working environment for the rotating mechanism, lifting mechanism and guiding mechanism; The rotating mechanism comprises a support frame (13), a worm (33) is rotatably provided at the bottom of the support frame (13), a worm gear (18) is meshingly connected to the worm gear (33), the worm gear (18) is sleeved on a union nut (20), the union nut (20) and the valve body (7) are threadedly connected, and a valve stem (24) and an oil nozzle assembly (25) are arranged on the lower side of the union nut (20); The lifting mechanism comprises a frame (15) arranged in the sealing mechanism, a lead screw (10) being rotatably arranged on the frame (15), the lead screw (10) being used to drive the support frame (13) to move in the height direction, thereby driving the valve stem (24) and the oil nozzle assembly (25) on the lower side of the union nut (20) to rise and move out of the valve body (7); The guiding mechanism comprises guiding pins (28) symmetrically arranged on the frame (15), and the guiding pins (28) are plugged into the lower part of the support frame (13).

2. The device for automatically replacing a fixed throttle nozzle according to claim 1 is characterized in that: The sealing mechanism comprises a first side plate (4), a front plate (8) and a second side plate (9) which are arranged circumferentially on the outside of a frame (15); the coupling (3), the first side plate (4), the front plate (8) and the second side plate (9) are connected to the frame (15) by screws; and the lower part of the frame (15) is fixed to the valve body (7) by bolts.

3. The device for automatically replacing a fixed throttle nozzle according to claim 1 is characterized in that: The support frame (13) comprises a connecting portion (1301) and a top plate (1302), the worm (33) is inserted into the top plate (1302), a second motor (6) is provided at the end of the worm (33), and the middle portion of the support frame (13) is connected via a gland (19) and a union nut (20).

4. The device for automatically replacing a fixed throttle nozzle according to claim 3 is characterized in that: A mounting surface (2001) is provided at the top of the union nut (20), a reverse hook groove (2006) is provided on the inner side of the mounting surface (2001), a reverse hook ring plate (1307) is provided at the middle of the support frame (13), the reverse hook ring plate (1307) is located in the reverse hook groove (2006), a stop ring (1901) is provided at the lower part of the gland (19), the bottom of the stop ring (1901) abuts against the top of the reverse hook ring plate (1307), both sides of the fastening nail (1902) abut between the reverse hook groove (2006) and the reverse hook ring plate (1307), and the stop ring (1901) is fixed by the fastening nail (1902) and the mounting surface (2001).

5. The device for automatically replacing a fixed throttle nozzle according to claim 4 is characterized in that: An annular groove (2004) and a convex ring (2003) are provided on the outer side of the union nut (20); the outer diameter of the annular groove (2004) is larger than the inner diameter of the worm wheel (18); a straight groove (2002) is provided between the annular groove (2004) and the convex ring (2003); a mounting groove (1801) is provided on the inner side of the worm wheel (18); a flat key (29) is inserted into the straight groove (2002) and the mounting groove (1801); a detachable steel wire clamp ring (21) is provided in the annular groove (2004); the top and the bottom of the worm wheel (18) respectively abut against the bottom surface of the steel wire clamp ring (21) and the top surface of the convex ring (2003); the lower side of the straight groove (2002) is connected to the straight groove (2002); and a partition plate (2005) is provided between the upper side of the straight groove (2002) and the annular groove (2004).

6. The device for automatically replacing a fixed throttle nozzle according to claim 1 is characterized in that: The top of the lead screw (10) is connected to the first motor (1) via a coupling (3), the first motor (1) is fixed via a first fixing seat (2) and a frame (15), the lower part of the lead screw (10) is connected to the frame (15) via a third fixing seat (14), the lower part of the lead screw (10) is also sleeved with a first bearing (26) and a first retaining spring (27), a lead screw nut (11) is threadedly connected to the lead screw (10), the lead screw nut (11) is connected to the support frame (13) via a stroke adjustment assembly (12), and two guide shafts (17) are arranged in parallel on one side of the lead screw (10), the guide shafts (17) are connected to the frame (15) via a fourth fixing seat (16).

7. The device for automatically replacing a fixed throttle nozzle according to claim 6 is characterized in that: A second fixing hole (1306) is provided at the top of the support frame (13), and the stroke adjustment assembly (12) comprises a lap plate (1201), one side of the lap plate (1201) is fixed to the bottom of the lead screw nut (11), and the other side of the lap plate (1201) is provided with a first fixing hole (1202), a round rod (1203) is passed through the first fixing hole (1202), an adjustment ring (1204) is provided at the top of the round rod (1203), the adjustment ring (1204) is connected to the round rod (1203) via a locking pin (1205), the locking pin (1205) and the round rod (1203) are threadedly connected, and the lower locking pin (1205) is passed through the second fixing hole (1306).

8. The device for automatically replacing a fixed throttle nozzle according to claim 3 is characterized in that: A straight plate (1304) is provided at the bottom of the support frame (13), and alignment holes (1305) are provided on the straight plate (1304) and the connecting portion (1301). The guide pin (28) and the alignment hole (1305) are plugged into each other. A plurality of operating holes (1303) are provided in the middle of the top plate (1302) along the circumferential direction. The lower part of the union nut (20) is connected to the valve stem (24) through a plug (22) and a flange (23), and the union nut (20) is pressed onto the top of the plug (22).

9. The device for automatically replacing a fixed throttle nozzle according to claim 3 is characterized in that: The worm (33) is sleeved with a second bearing (32) and an oil seal (30) in sequence along the axis direction approaching the second motor (6); the second motor (6) is connected to the support frame (13) via a second fixing seat (5); a bearing seat (31) is sleeved on the outer side of the second bearing (32) and the oil seal (30); and the worm (33) is sleeved with a third bearing (35) and a retaining spring (34) along the axis direction away from the second motor (6).

10. The device for automatically replacing a fixed throttle nozzle according to claim 3 is characterized in that: The invention also includes a bracket (36), one side of the bracket (36) is connected to the support frame (13), the bracket (36) is slidably connected to the frame (15), the inner side of the frame (15) is provided with a slide groove (1501), the inner side of the connecting portion (1301) is provided with two lock holes (1308) in parallel, the bracket (36) includes a lifting ring (3609), the lifting ring (3609) is sleeved on the outer side of the union nut (20), one side of the lifting ring (3609) is connected to the extension plate (3602) through the reinforcing plate (3601), and the extension plate (3602) is connected to the extension plate (3602). A plug rod (3603) is provided on the lifting ring (3609), and the plug rod (3603) is plugged into the lock hole (1308). A contact plate (3604) is provided on the other side of the lifting ring. A contact head (3605) is provided at the end of the contact plate (3604). The upper and lower sides of the contact head (3605) are both provided with rounded corners (3606). A plurality of countersunk holes (3607) are also provided on the lifting ring (3609) along the circumference. A spring (3608) is provided in the countersunk hole (3607), and the top of the spring (3608) is against the lower side of the worm gear (18).

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