A valve rod polishing device for a forged steel ball valve

Abstract

The present application relates to the technical field of valve rod polishing, and discloses a valve rod polishing device for forged steel ball valves, which comprises a mounting shell, two connecting seats symmetrically and fixedly installed on the side surface of the mounting shell, a drive screw threadedly connected to the inner wall of one connecting seat, and a guide rod slidingly installed on the inner wall of the other connecting seat, a sliding seat slidingly installed on the inner bottom surface of the mounting shell, and two supporting springs symmetrically and fixedly installed between the side surface of the sliding seat and the inner wall of the mounting shell. The drive motor drives the polishing abrasive wheel ring to rotate, and the drive screw drives the mounting shell to move, cooperating with the rotation of the valve rod, so that the polishing of the outer wall of the valve rod can be completed at one time. When the ring opening is encountered, the top frame triggers the rotation of the magnetic plate, so that the polishing abrasive wheel ring is accommodated in the ring opening for polishing the inner wall, without the need for manual switching of tools or adjustment of processes. Compared with the traditional step-by-step polishing method, the valve rod polishing device saves the time for multiple clamping and process conversion, avoids the repeated positioning error of the valve rod, improves the overall machining efficiency, and is suitable for batch valve rod polishing operations.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of valve rod polishing, in particular to a valve rod polishing device for forged steel ball valves. BACKGROUND

[0002] A forged steel ball valve is a ball valve manufactured through a high-temperature forging process, commonly used in industrial fluid control systems, and the opening or closing of the valve is achieved by rotating the ball. When the valve rod is rotated by 90 degrees, the through hole on the ball is connected with the pipeline, the valve is opened, and the fluid can pass freely; when it is rotated by another 90 degrees, the solid part of the ball blocks the fluid passage, and the valve is closed.

[0003] According to the search, a valve rod processing automatic cooling segmented polisher (CN119217170A) is disclosed, which belongs to the technical field of valve rod polishers and comprises a support seat, a cooling spraying mechanism and a segmented adjusting mechanism. The lower part of the support seat is movably penetrated by a limiting rod, and the upper part of the support seat is threaded with a lead screw. A water tank is installed at the upper end of the support seat, and a water inlet hole and a sealing cover are arranged on the water tank for adding water to the water tank and sealing the water tank, respectively. Support pipes are installed at the inner top and inner bottom of the support seat, and the open ends of the support pipes are movably connected with one end of a support frame, and the other end of the support frame is provided with a vertical shaft frame. The entire device does not need external facilities. During the process of polishing the valve rod, water is automatically sucked and sprayed at the polishing position inside the device to avoid high temperature at the polishing position, and the position of the polishing wheel can be automatically adjusted when the polishing reaches the boss, so that segmented polishing can be automatically performed. However, the following problems still exist in actual use of the scheme:

[0004] During the processing of the valve rod of the forged steel ball valve, the ring structure needs to be accurately arranged on the outer wall of the valve rod. However, in the conventional polishing process of the valve rod, in order to consider the overall processing efficiency, quickly remove the oxide skin, processing allowance and burrs on the surface of the valve rod after forging or rough machining, the industry generally uses a wide and thick polishing wheel for work. Although this kind of thick polishing wheel can efficiently complete the polishing of the outer wall of the valve rod, it is usually unable to accurately polish the ring inside the outer wall of the valve rod due to the characteristics of the grinding track of the polishing wheel, and an additional secondary processing procedure is required, which not only increases the cost of manpower, equipment and time, but also breaks the continuity of the original processing procedure and reduces the overall polishing processing efficiency of the valve rod.

[0005] Therefore, a valve rod polishing device for forged steel ball valves needs to be designed to solve the above problems. SUMMARY

[0006] The purpose of the present application is to solve the problems existing in the prior art and to provide a valve rod polishing device for forged steel ball valves.

[0007] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0008] A valve stem grinding device for a forged steel ball valve includes a mounting shell and two connecting seats symmetrically fixedly mounted on the side of the mounting shell. A drive screw is screwed to the inner wall of one connecting seat, and a guide rod is slidably mounted on the inner wall of the other connecting seat. A sliding seat is slidably mounted on the inner bottom surface of the mounting shell. Two support springs are symmetrically fixedly mounted between the side of the sliding seat and the inner wall of the mounting shell. A drive motor is fixedly mounted on one end of the sliding seat. A support ring is provided at the output end of the drive motor. A grinding wheel ring is fixedly mounted on the outer wall of the support ring. An adjustment component for adjusting the position of both ends of the grinding wheel ring is provided between the output end of the drive motor and the grinding wheel ring. A drive component for driving the adjustment component is provided on the inner top surface of the mounting shell. A positioning component for aligning the valve stem is provided on the top surface of the mounting shell.

[0009] As a preferred embodiment of the present invention, the adjusting component includes a mounting sleeve that is slidably fitted onto the output end of the drive motor. A sliding sleeve is slidably fitted onto the outer wall of the mounting sleeve. Both the mounting sleeve and the sliding sleeve have a plurality of guide openings arranged in a circular array on their outer walls. A plurality of support plates corresponding to the guide openings are fixedly installed at the output end of the drive motor, and the ends of the support plates pass through the guide openings and are fixedly connected to the inner wall of the support ring. A connecting structure is provided between the mounting sleeve, the sliding sleeve, and the support ring.

[0010] As a preferred embodiment of the present invention, the connecting structure includes a plurality of top plates symmetrically hinged to the inner wall of the support ring and arranged in a ring array. Two top blocks are symmetrically fixedly installed on the side of the top plate opposite to the grinding wheel ring, and the side of the top block is fixedly connected to the inner wall of the grinding wheel ring. A plurality of transmission plates are hinged to the ends of the mounting sleeve and the sliding sleeve that are far apart from each other, and the other end of the transmission plate is hinged to the side of the top plate.

[0011] As a preferred embodiment of the present invention, the side of the support plate is fitted with the inner wall of the guide opening.

[0012] As a preferred embodiment of the present invention, the driving assembly includes a shaft rotatably mounted on the top surface of the mounting housing, and a mounting frame is fixedly mounted on the bottom end of the shaft. A magnetic plate is fixedly mounted on the inner wall of the mounting frame. Both the mounting sleeve and the sliding sleeve have accommodating grooves at their ends. A magnetic ring one is fixedly mounted on the inner wall of the accommodating groove located at the end of the sliding sleeve, and a magnetic ring two is fixedly mounted on the inner wall of the other accommodating groove.

[0013] As a preferred embodiment of the present invention, the magnetic ring one has the same magnetic poles as the magnetic plate, and the magnetic ring two has opposite magnetic poles to the magnetic plate.

[0014] As a preferred technical scheme of the present application, the positioning assembly comprises a guide frame fixedly installed on the top surface of the mounting shell, an inner wall of the guide frame is slidably installed with a connecting rod, a bottom end of the connecting rod is fixedly installed with a top frame, the top surface of the mounting shell is slidably installed with a guide strip, and the side surface of the guide strip is fixedly connected with the end portion of the connecting rod, the top end of the shaft rod penetrates through the top surface of the mounting shell and is fixedly installed with a transmission gear, the side surface of the guide strip is fixedly installed with a driving rack engaged with the transmission gear, the shaft rod is sleeved with a torsion spring, and the two ends of the torsion spring are fixedly connected with the shaft rod and the mounting shell respectively, and the inner bottom surface of the sliding seat is provided with a cleaning structure corresponding to the polishing grinding wheel ring.

[0015] As a preferred technical scheme of the present application, the top frame is V-shaped, and the width of the top frame is the same as the width of the supporting ring.

[0016] As a preferred technical scheme of the present application, the cleaning structure comprises a vertical plate fixedly installed on the inner wall of the end portion of the sliding seat, the side surface of the vertical plate is provided with a waste box, the top surface of the waste box is provided with a material falling port, the inner wall of the material falling port is fixedly installed with a plurality of supporting plates, and the top end of each supporting plate is fixedly installed with a cleaning scraper.

[0017] As a preferred technical scheme of the present application, the cleaning scraper is arc-shaped and the top surface thereof is matched with the outer wall of the polishing grinding wheel ring.

[0018] The present application has the following advantages:

[0019] 1. In the present application, the polishing grinding wheel ring is rotated by the driving motor, the mounting shell is moved by the driving screw rod, and the valve rod is rotated, so that the outer wall of the valve rod can be polished at one time. When the ring opening is encountered, the top frame triggers the magnetic plate to rotate, so that the polishing grinding wheel ring is automatically stored and matched with the inner wall of the ring opening for polishing. Manual switching of tools or adjustment of processes is not required. Compared with the traditional step-by-step polishing method, the present application saves the time for multiple clamping and process conversion, avoids the positioning error of the valve rod, improves the overall processing efficiency, and is suitable for batch valve rod polishing operation.

[0020] 2. In the present application, the area of the polishing grinding wheel ring is large when it is normally expanded, so that the polishing of the outer wall of the valve rod is uniform. When the ring opening is entered, the polishing grinding wheel ring is automatically stored and always matched with the inner wall of the ring opening under the action of the supporting spring, so as to ensure the polishing precision of the ring opening. At the same time, after the top frame leaves the ring opening, the grinding wheel ring can be automatically reset and expanded to continuously match the outer wall of the valve rod, so as to avoid polishing discontinuity. This self-adaptive adjustment capability can accurately match the different polishing requirements of the cylindrical outer wall of the valve rod and the ring opening, and improve the smoothness of the valve rod surface and the size consistency.

[0021] 3. In this invention, when the grinding wheel ring rotates, its outer wall is always in contact with the cleaning scraper. The scraper can remove the grinding debris attached to the surface of the grinding wheel ring in real time, avoiding the impact of debris residue on subsequent grinding accuracy. The cleaned debris automatically falls into the waste box, eliminating the need for frequent manual cleaning of the grinding wheel ring. This reduces manual maintenance costs, maintains stable grinding performance of the grinding wheel ring, avoids the decline in grinding quality caused by debris accumulation, and extends the service life of the grinding wheel ring. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a valve stem grinding device for a forged steel ball valve proposed in this invention. Figure 1 ;

[0023] Figure 2 This is a schematic diagram of the overall structure of a valve stem grinding device for a forged steel ball valve proposed in this invention. Figure 2 ;

[0024] Figure 3 This is a schematic diagram of the sliding seat structure of a valve stem grinding device for a forged steel ball valve proposed in this invention;

[0025] Figure 4 This is a schematic diagram of the drive motor and grinding wheel ring structure of the valve stem grinding device for a forged steel ball valve proposed in this invention;

[0026] Figure 5 This is an exploded view of the support ring and grinding wheel ring of the valve stem grinding device for a forged steel ball valve proposed in this invention.

[0027] Figure 6 This is a partial cross-sectional view of the drive motor and grinding wheel ring of the valve stem grinding device for a forged steel ball valve proposed in this invention.

[0028] Figure 7 for Figure 6 Enlarged structural diagram at point A in the middle;

[0029] Figure 8 This is a schematic diagram of the inner structure of the mounting housing of the valve stem grinding device for a forged steel ball valve proposed in this invention. Figure 1 ;

[0030] Figure 9 This is a schematic diagram of the inner structure of the mounting housing of the valve stem grinding device for a forged steel ball valve proposed in this invention. Figure 2 ;

[0031] Figure 10 for Figure 8 Enlarged structural diagram at point B.

[0032] Fig. 11, mounting shell; 12, connecting seat; 13, drive screw; 14, guide rod; 21, sliding seat; 22, support spring; 23, drive motor; 24, support ring; 25, polishing wheel ring; 31, mounting sleeve; 32, sliding sleeve; 33, guide port; 34, support plate; 35, top plate; 36, top block; 37, transmission plate; 41, shaft; 42, magnetic plate; 43, container groove; 44, magnetic ring one; 45, magnetic ring two; 51, guide frame; 52, connecting rod; 53, top frame; 54, guide bar; 55, transmission gear; 56, drive rack; 57, torsional spring; 61, vertical plate; 62, scrap box; 63, blanking port; 64, support plate; 65, cleaning scraper. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments.

[0034] Reference Figures 1-3 A valve rod polishing device for forged steel ball valves, comprising a mounting shell 11 and two connecting seats 12 symmetrically and fixedly installed on the side of the mounting shell 11, the inner wall of one connecting seat 12 is screwed with a drive screw 13, and the inner wall of the other connecting seat 12 is slidingly installed with a guide rod 14, the inner bottom surface of the mounting shell 11 is slidingly installed with a sliding seat 21, two support springs 22 are symmetrically and fixedly installed between the side surface of the sliding seat 21 and the inner wall of the mounting shell 11, one end of the sliding seat 21 is fixedly installed with a drive motor 23, the output end of the drive motor 23 is provided with a support ring 24, and the outer wall of the support ring 24 is fixedly installed with a polishing wheel ring 25.

[0035] In use, first, the staff needs to fix the valve rod inside the polishing device, and the valve rod is located at the side of the mounting shell 11, and after the entire valve rod is installed, it can be located outside the outer wall of the polishing wheel ring 25, then the staff can start the drive motor 23 and the drive screw 13, and drive the entire valve rod to rotate by the polishing device, when the drive screw 13 rotates, since the mounting shell 11 is screwed with the drive screw 13 through the connecting seat 12 and is slidingly connected with the guide rod 14 through the connecting seat 12, therefore, when the drive screw 13 rotates, it can drive the mounting shell 11 to move along the guide rod 14, so as to cooperate with the rotation of the valve rod and the rotation of the polishing wheel ring 25 driven by the drive motor 23 to polish the outer wall of the valve rod, the entire valve rod is cylindrical, under the use of the polishing wheel ring 25, one-time polishing of the outer wall and the ring opening of the valve rod can be realized, the polishing efficiency is improved, the polishing wheel ring 25 is made of wear-resistant composite material, which can reduce the wear during use and reduce the replacement frequency.

[0036] Reference Figures 4-7The output end of the driving motor 23 and the polishing wheel ring 25 are provided with an adjusting assembly for adjusting the position of the two ends of the polishing wheel ring 25, the adjusting assembly comprises a mounting sleeve 31 slidably sleeved on the output end of the driving motor 23, a sliding sleeve 32 slidably sleeved on the outer wall of the mounting sleeve 31, a plurality of guide holes 33 in the form of annular array are formed in the outer wall of the mounting sleeve 31 and the sliding sleeve 32, a plurality of supporting plates 34 corresponding to the guide holes 33 are fixedly installed on the output end of the driving motor 23, and the end portions of the supporting plates 34 are fixedly connected with the inner wall of the supporting ring 24 through the guide holes 33, the side surface of the supporting plate 34 is in close contact with the inner wall of the guide hole 33, and a connecting structure is arranged between the mounting sleeve 31, the sliding sleeve 32 and the supporting ring 24;

[0037] The connecting structure comprises a plurality of top plates 35 symmetrically hinged to the inner wall of the supporting ring 24 in the form of annular array, two top blocks 36 are symmetrically and fixedly installed on the side surface of the polishing wheel ring 25 opposite to the top plate 35, and the side surface of the top block 36 is fixedly connected with the inner wall of the polishing wheel ring 25, a plurality of transmission plates 37 are hinged to the ends of the mounting sleeve 31 and the sliding sleeve 32 away from each other, and the other end of the transmission plate 37 is hinged to the side surface of the top plate 35.

[0038] Referring to Figures 7-9 The inner top surface of the mounting shell 11 is provided with a driving assembly for driving the adjusting assembly, the driving assembly comprises a shaft 41 rotatably installed on the inner top surface of the mounting shell 11, a mounting frame is fixedly installed on the bottom end of the shaft 41, a magnetic plate 42 is fixedly installed on the inner wall of the mounting frame, a container groove 43 is formed in the end of the mounting sleeve 31 and the sliding sleeve 32, a magnetic ring one 44 is fixedly installed on the inner wall of the container groove 43 at the end of the sliding sleeve 32, and a magnetic ring two 45 is fixedly installed on the inner wall of the other container groove 43, the magnetic pole opposite to the magnetic plate 42 of the magnetic ring one 44 is the same, and the magnetic pole opposite to the magnetic plate 42 of the magnetic ring two 45 is opposite.

[0039] When the outer wall of the valve rod is normally polished, the whole polishing wheel ring 25 is in Figure 4When the state is normal, the polishing abrasive wheel ring 25 can be normally expanded to increase the polishing area, so as to improve the polishing efficiency. At this time, the magnetic poles of the magnetic plate 42 and the magnetic ring one 44 are the same, and the magnetic poles of the magnetic plate 42 and the magnetic ring two 45 are opposite. Therefore, under the action of the different magnetic forces, the mounting sleeve 31 and the sliding sleeve 32 are in the shortened state. The magnetic plate 42, the magnetic ring one 44 and the magnetic ring two 45 are permanent magnets, and the magnetic force between the magnetic plate 42 and the magnetic ring one 44 and the magnetic ring two 45 is sufficient to overcome the friction force in the operation of the mounting sleeve 31 and the sliding sleeve 32. The polishing abrasive wheel ring 25 is normally expanded, and when the output end of the driving motor 23 rotates, the support ring 24 can be driven through the support plate 34 in the guide port 33, so as to drive the polishing abrasive wheel ring 25 to rotate and realize polishing. When the shaft 41 rotates 180 degrees, the magnetic plate 42 rotates 180 degrees synchronously. At this time, the magnetic poles of the magnetic plate 42 and the magnetic ring one 44 are opposite, and the magnetic poles of the magnetic plate 42 and the magnetic ring two 45 are the same. Therefore, under the action of the magnetic force, the mounting sleeve 31 and the sliding sleeve 32 can slide away from each other, so that the mounting sleeve 31 and the sliding sleeve 32 are expanded and elongated. When the mounting sleeve 31 and the sliding sleeve 32 are expanded, the top plate 35 can be pulled through the transmission plate 37, so that the top plate 35 rotates to drive the both ends of the polishing abrasive wheel ring 25 to move and be stored.

[0040] With reference to Figure 1 and Figure 9 , the top surface of the mounting shell 11 is provided with a positioning assembly for fitting the valve rod, the positioning assembly comprising a guide frame 51 fixedly installed on the top surface of the mounting shell 11, a connecting rod 52 slidably installed on the inner wall of the guide frame 51, a top frame 53 fixedly installed at the bottom end of the connecting rod 52, the top frame 53 being V-shaped and having the same width as the support ring 24, a guide strip 54 slidably installed on the top surface of the mounting shell 11 and fixedly connected with the end portion of the connecting rod 52, a transmission gear 55 fixedly installed on the top end of the shaft 41 and penetrating through the top surface of the mounting shell 11, a drive rack 56 fixedly installed on the side surface of the guide strip 54 and engaged with the transmission gear 55, a torsional spring 57 sleeved on the shaft 41 and fixedly connected with the shaft 41 and the mounting shell 11 at both ends, and a cleaning structure corresponding to the polishing abrasive wheel ring 25 provided on the inner bottom surface of the sliding seat 21.

[0041] After the valve rod is fixed, the state of the whole device is as Figure 1 , Figure 2As shown, at this time, the top frame 53 and the outer wall of the polishing abrasive wheel ring 25 are in close contact, and as the driving screw 13 drives the movement of the mounting shell 11, the polishing abrasive wheel ring 25 can realize polishing of the valve rod during movement along the outer wall of the valve rod, and when the annular opening position of the outer wall of the valve rod is encountered, the top frame 53 can first enter the annular opening of the outer wall of the valve rod, and when the top frame 53 enters the annular opening, the connecting rod 52 can slide along the guide frame 51 and drive the guide strip 54 to move, and as the driving rack 56 on the side of the guide strip 54 is in mesh with the transmission gear 55, the sliding of the driving rack 56 can drive the shaft 41 to rotate, so that the magnetic plate 42 at the bottom end of the shaft 41 can rotate by 180 degrees; after the polishing abrasive wheel ring 25 is stored, it can always be in close contact with the inner side of the annular opening under the action of the supporting spring 22, so that the inner wall of the annular opening can be polished when it rotates; when the top frame 53 moves out of the annular opening, it can drive the magnetic plate 42 to rotate by 180 degrees again, and at this time, the mounting sleeve 31 and the sliding sleeve 32 can approach each other under the action of the magnetic force, that is, the polishing abrasive wheel ring 25 can be unfolded to drive the sliding seat 21 to compress the supporting spring 22, so that the polishing abrasive wheel ring 25 can be in close contact with the outer wall of the valve rod again, that is, the polishing of the valve rod can continue.

[0042] Referring to Figure 8 and Figure 10 , the cleaning structure includes a vertical plate 61 fixedly installed on the inner wall of the end portion of the sliding seat 21, the side surface of the vertical plate 61 is provided with a waste box 62, the top surface of the waste box 62 is provided with a falling opening 63, and the inner wall of the falling opening 63 is fixedly installed with a plurality of supporting plates 64, the top end of each supporting plate 64 is fixedly installed with a cleaning scraper 65, and the cleaning scraper 65 is arc-shaped and the top surface thereof is in close contact with the outer wall of the polishing abrasive wheel ring 25.

[0043] During the entire polishing process, the outer wall of the polishing abrasive wheel ring 25 can always be in close contact with the top surface of the cleaning scraper 65, and the top surface of the cleaning scraper 65 is in close contact with the outer wall of the polishing abrasive wheel ring 25, so that the outer wall of the polishing abrasive wheel ring 25 can be cleaned by the cleaning scraper 65 during the rotation of the polishing abrasive wheel ring 25, and the debris cleaned can fall into the waste box 62 under the action of gravity, so as to realize cleaning of the outer wall of the polishing abrasive wheel ring 25, so as to improve the smoothness of polishing, and meanwhile, the waste box 62 and the vertical plate 61 are connected in a detachable manner, so that the impurities in the waste box 62 can be conveniently treated.

[0044] The specific working principle of the present application is as follows:

[0045] In use, first, the staff need to fix the valve rod on the inner side of the polishing device, and the valve rod is located on the side of the mounting shell 11, and after the whole valve rod is installed, it can be located between the top frame 53 and the polishing sand wheel ring 25, then the staff can start the drive motor 23 and the drive screw 13, and drive the whole valve rod to rotate by the polishing device, when the drive screw 13 rotates, because the mounting shell 11 is screwed with the drive screw 13 through the connecting seat 12, and is slidingly connected with the guide rod 14 through the connecting seat 12, therefore, when the drive screw 13 rotates, it can drive the mounting shell 11 to move along the guide rod 14, so as to cooperate with the rotation of the valve rod and the rotation of the polishing sand wheel ring 25 driven by the drive motor 23 to polish the outer wall of the valve rod. The whole valve rod is cylindrical, and under the cooperation of the top frame 53 and the polishing sand wheel ring 25, it can realize one-time polishing of the outer wall of the valve rod and the ring opening, and improve the polishing efficiency;

[0046] Specifically, after the valve rod is fixed, the state of the whole device is as shown in Figure 1 、 Figure 2 At this time, the outer wall of the top frame 53 and the polishing sand wheel ring 25 is in close contact, and as the drive screw 13 drives the movement of the mounting shell 11, the polishing sand wheel ring 25 can polish the valve rod in the process of moving along the outer wall of the valve rod. When the ring opening position of the valve rod outer wall is encountered, because the top frame 53 and the supporting ring 24 are staggered by one position, the top frame 53 can first enter the ring opening of the valve rod outer wall, and when the top frame 53 enters the ring opening, the connecting rod 52 can slide along the guide frame 51 and drive the guide strip 54 to move. When the guide strip 54 slides, because the side drive rack 56 is engaged with the transmission gear 55, the sliding of the drive rack 56 can drive the shaft 41 to rotate, so that the magnetic plate 42 at the bottom end of the shaft 41 can rotate by 180 degrees.

[0047] When the outer wall of the valve rod is normally polished, the whole polishing sand wheel ring 25 is in Figure 4When the state is normal, the polishing wheel ring 25 can be normally unfolded to increase the polishing area, so as to improve the polishing efficiency. At this time, the magnetic poles of the magnetic plate 42 opposite to the magnetic ring one 44 are the same, and the magnetic poles of the magnetic plate 42 opposite to the magnetic ring two 45 are opposite. Therefore, under the action of the different magnetic forces, the mounting sleeve 31 and the sliding sleeve 32 are in the shortened state, the polishing wheel ring 25 is normally unfolded, and when the output end of the driving motor 23 rotates, the support ring 24 can be driven through the support plate 34 in the guide opening 33, so as to drive the polishing wheel ring 25 to rotate and realize polishing. When the shaft 41 rotates 180 degrees, the magnetic plate 42 rotates 180 degrees synchronously. At this time, the magnetic poles of the magnetic plate 42 opposite to the magnetic ring one 44 are opposite, and the magnetic poles of the magnetic plate 42 opposite to the magnetic ring two 45 are the same. Therefore, under the action of the magnetic force, the mounting sleeve 31 and the sliding sleeve 32 can slide away from each other, so that the mounting sleeve 31 and the sliding sleeve 32 are unfolded and elongated. When the mounting sleeve 31 and the sliding sleeve 32 are unfolded, the top plate 35 can be pulled through the transmission plate 37, so that the top plate 35 rotates to drive the both ends of the polishing wheel ring 25 to move and be accommodated;

[0048] After the polishing wheel ring 25 is accommodated, under the action of the supporting spring 22, the polishing wheel ring 25 can always be attached to the inner side of the ring opening, so that the inner wall of the ring opening can be polished when the polishing wheel ring 25 rotates. When the top frame 53 moves out of the ring opening, the magnetic plate 42 can be rotated 180 degrees again. At this time, under the action of the magnetic force, the mounting sleeve 31 and the sliding sleeve 32 can be close to each other and shortened, so as to drive the polishing wheel ring 25 to unfold, drive the sliding seat 21 to compress the supporting spring 22, and make the polishing wheel ring 25 attach to the outer wall of the valve rod again, so as to continue to polish the valve rod. During the whole polishing process, the outer wall of the polishing wheel ring 25 can always be attached to the top surface of the cleaning scraper 65. The top surface of the cleaning scraper 65 is attached to the outer wall of the polishing wheel ring 25. Therefore, the outer wall of the polishing wheel ring 25 can be cleaned through the cleaning scraper 65 during the rotation of the polishing wheel ring 25. The debris cleaned can fall into the waste box 62 under the action of gravity, so as to realize the cleaning of the outer wall of the polishing wheel ring 25, and improve the smoothness of polishing.

[0049] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A valve rod polishing device for a forged steel ball valve, comprising a mounting shell (11) and two connecting seats (12) symmetrically fixedly mounted on the side surface of the mounting shell (11), the inner wall of one connecting seat (12) is screwed with a driving screw rod (13), and the inner wall of the other connecting seat (12) is slidingly mounted with a guide rod (14), characterized in that, The inner bottom surface of the mounting shell (11) is slidably mounted with a sliding seat (21), two supporting springs (22) are symmetrically and fixedly installed between the side surface of the sliding seat (21) and the inner wall of the mounting shell (11), one end of the sliding seat (21) is fixedly installed with a driving motor (23), the output end of the driving motor (23) is provided with a supporting ring (24), the outer wall of the supporting ring (24) is fixedly installed with a polishing grinding wheel ring (25), the output end of the driving motor (23) and the polishing grinding wheel ring (25) are provided with an adjusting assembly for adjusting the position of the two ends of the polishing grinding wheel ring (25), the inner top surface of the mounting shell (11) is provided with a driving assembly for driving the adjusting assembly, and the top surface of the mounting shell (11) is provided with a positioning assembly for aligning the valve rod. The adjusting assembly comprises a mounting sleeve (31) slidably sleeved on the output end of the driving motor (23), the outer wall of the mounting sleeve (31) is slidably sleeved with a sliding sleeve (32), the outer wall of the mounting sleeve (31) and the sliding sleeve (32) are both provided with a plurality of guide ports (33) arranged in a ring array, the output end of the driving motor (23) is fixedly installed with a plurality of supporting plates (34) corresponding to the guide ports (33), and the end portions of the supporting plates (34) are fixedly connected with the inner wall of the supporting ring (24) through the guide ports (33), and a connecting structure is arranged between the mounting sleeve (31), the sliding sleeve (32) and the supporting ring (24). The driving assembly comprises a shaft rod (41) rotatably installed on the inner top surface of the mounting shell (11), and the bottom end of the shaft rod (41) is fixedly installed with a mounting frame, the inner wall of the mounting frame is fixedly installed with a magnetic plate (42), the end portions of the mounting sleeve (31) and the sliding sleeve (32) are both provided with a containing groove (43), the inner wall of the containing groove (43) located at the end portion of the sliding sleeve (32) is fixedly installed with a magnetic ring one (44), the opposite magnetic poles of the magnetic ring one (44) and the magnetic plate (42) are the same, and the inner wall of the other containing groove (43) is fixedly installed with a magnetic ring two (45), and the opposite magnetic poles of the magnetic ring two (45) and the magnetic plate (42) are opposite.

2. A device for polishing a valve stem of a forged steel ball valve according to claim 1, characterized in that, The connecting structure comprises a plurality of top plates (35) arranged in a ring array and symmetrically hinged to the inner wall of the supporting ring (24), the opposite side surfaces of the top plates (35) are symmetrically and fixedly installed with two top blocks (36), and the side surfaces of the top blocks (36) are fixedly connected with the inner wall of the polishing grinding wheel ring (25), and the ends of the mounting sleeve (31) and the sliding sleeve (32) away from each other are both hinged with a plurality of transmission plates (37), and the other ends of the transmission plates (37) are hinged with the side surfaces of the top plates (35).

3. A device for polishing a valve stem of a forged steel ball valve as defined in claim 1, wherein The side surface of the supporting plate (34) is in close contact with the inner wall of the guide port (33).

4. A device for polishing a valve stem of a forged steel ball valve according to claim 1, wherein The positioning assembly comprises a guide frame (51) fixedly installed on the top surface of the mounting shell (11), an inner wall of the guide frame (51) is slidably installed with a connecting rod (52), a bottom end of the connecting rod (52) is fixedly installed with a top frame (53), a top surface of the mounting shell (11) is slidably installed with a guide strip (54), a side surface of the guide strip (54) is fixedly connected with an end portion of the connecting rod (52), a top end of the shaft rod (41) penetrates through the top surface of the mounting shell (11) and is fixedly installed with a transmission gear (55), a side surface of the guide strip (54) is fixedly installed with a driving rack (56) engaged with the transmission gear (55), the shaft rod (41) is sleeved with a torsion spring (57), and two ends of the torsion spring (57) are fixedly connected with the shaft rod (41) and the mounting shell (11) respectively, and an inner bottom surface of the sliding seat (21) is provided with a cleaning structure corresponding to the polishing abrasive wheel ring (25).

5. A device for polishing a valve stem of a forged steel ball valve as defined in claim 4, wherein The top frame (53) is V-shaped, and the width of the top frame (53) is the same as the width of the supporting ring (24).

6. A device for polishing a valve stem of a forged steel ball valve as defined in claim 4, wherein The cleaning structure comprises a vertical plate (61) fixedly installed on the inner wall of the end portion of the sliding seat (21), a side surface of the vertical plate (61) is provided with a waste box (62), a top surface of the waste box (62) is provided with a material falling port (63), an inner wall of the material falling port (63) is fixedly installed with a plurality of supporting plates (64), and top ends of the supporting plates (64) are fixedly installed with cleaning scrapers (65).

7. A device for polishing a valve stem of a forged steel ball valve as defined in claim 6, wherein The cleaning scraper (65) is arc-shaped and the top surface thereof is attached to the outer wall of the polishing abrasive wheel ring (25).

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