Automatic drilling equipment for fire hydrant

Abstract

The invention relates to the technical field of fire hydrant machining, in particular to fire hydrant automatic drilling equipment which comprises a machining table, a fixing unit used for fixing a fire hydrant body is arranged at the upper end of the machining table, and a machining unit is arranged above the fixing unit. According to the fixing unit, the fire hydrant body can be stably fixed inside and outside through the outer clamping assembly and the inner clamping assembly, the outer clamping assembly can apply outer clamping force which is uniform in the circumferential direction to the outer side of the fire hydrant body and can also provide support for a drilling point position at a connector of the fire hydrant body, and the drilling efficiency is improved. The bolt body is effectively prevented from deforming due to local stress concentration in the drilling process, meanwhile, rotation of the bolt body can be limited, the inner clamping assembly can be matched with the control piece to further conduct inner clamping on the inner wall of the bolt body, it is ensured that the bolt body is accurately and stably fixed, and therefore the drilling quality and efficiency are improved.

Description

Technical Field

[0001] The invention relates to the technical field of fire hydrant processing, in particular to automatic drilling equipment for fire hydrants. Background Art

[0002] Fire hydrants are important facilities for fire fighting and emergency rescue. They are usually installed inside and outside buildings, on streets, etc., so that firefighters can quickly connect water hoses to extinguish fires. Drilling is one of the key steps in manufacturing fire hydrant bodies. It is common to drill threaded holes in the interface of fire hydrants to tightly connect with fire hoses or other accessories, ensuring that fire hydrants can be correctly and reliably connected to the water supply system and used.

[0003] However, the following problems still exist in the process of drilling holes in fire hydrant bodies: the method of manually rotating the fire hydrant body to drill holes point by point not only has low overall processing efficiency, but also makes it difficult to ensure that the angle of each rotation is consistent, the accuracy of the drilling position is low, and the fire hydrant body with insufficient stability is easily affected by external forces and shakes, which easily leads to deviation in the position of the threaded hole and unstable processing quality. There are also existing equipment for automatic drilling. Although the automatic drilling equipment has high processing efficiency, the connection stability of the processing end itself is insufficient, which is not conducive to the precise and stable completion of the operation, and the overall structural stability needs to be improved. In addition, when using the automatic drilling equipment, the fire hydrant body is in an independent simple clamping and fixing state, and relies on the rotation of the processing end of the automatic drilling equipment to achieve multi-hole forming. The fixing stability of the fire hydrant body itself and the accuracy of the rotation angle of the processing end also need to be improved.

[0004] Therefore, in order to solve the problems existing in the drilling process of the fire hydrant body, the present invention provides an automatic drilling device for a fire hydrant. Summary of the invention

[0005] The present invention provides an automatic drilling device for fire hydrants, comprising a processing table, wherein a fixing unit for fixing a fire hydrant body is arranged at the upper end of the processing table, and a processing unit is arranged above the fixing unit; the fixing unit comprises a bottom column installed at the center of the upper end of the processing table, an inner clamping assembly is arranged at the upper end of the bottom column, the inner clamping assembly comprises an arc-shaped clamping plate arranged uniformly in the circumferential direction, and outer clamping assemblies are arranged on both the front and rear sides of the bottom column, and the outer clamping assembly comprises a support plate arranged uniformly in the circumferential direction, a pressure piece is arranged on one side of the support plate close to the center of the semi-circular bottom plate, and a locking piece is arranged between the front and rear two outer clamping assemblies; the processing unit comprises a rotating circular plate arranged above the processing table, and a rotating circular plate is arranged at the lower end A circular pressure plate is provided, and a control member for controlling the synchronous movement of circumferentially arranged arc-shaped clamping plates is provided at the lower end of the circular pressure plate; a square plate is provided at the lower end of the rotating circular plate, and a driving part and a screw drill bit are installed at the lower end of the square plate through a mounting member; processing through grooves evenly arranged circumferentially are provided on the circular pressure plate, and a connecting member is provided between the square plate and the rotating circular plate; the rotating circular plate is rotatably installed on an inner fixed ring, an outer fixed ring is provided on the outer side of the inner fixed ring, and a limiting assembly for limiting the rotation angle of the rotating circular plate is provided on the inner fixed ring; a pushing member for pushing the square plate and the screw drill bit downward is provided at the upper end of the rotating circular plate, and a supporting assembly is provided between the processing unit and the processing table.

[0006] In one possible implementation, the inner clamping assembly also includes a fixed sleeve installed at the upper end of the base column, the outer side of the fixed sleeve is provided with an arc-shaped groove evenly arranged in the circumference, an arc-shaped clamping plate is arranged on the outer side of the arc-shaped clamping plate, a control plate slidably connected to the fixed sleeve is installed on the inner side of the arc-shaped clamping plate, a slope is provided on the side of the control plate away from the corresponding arc-shaped clamping plate, two connecting springs distributed up and down about the control plate are connected between the arc-shaped clamping plate and the corresponding arc-shaped groove wall, the control part includes a matching column installed at the lower end of the circular pressure plate and matching with the inner annular surface of the fire hydrant body, and a pushing column in the shape of a truncated cone and matching with the circumferentially arranged control plate is installed at the lower end of the matching column.

[0007] In one possible implementation, the external clamping assembly also includes a semi-annular bottom plate slidably connected to the processing table front and back, a support plate evenly arranged in the circumferential direction is installed on the upper end of the semi-annular bottom plate, a semi-annular mounting plate is commonly installed on the upper ends of the support plates arranged in the circumferential direction, a semi-annular supporting plate is arranged on the upper end of the semi-annular mounting plate, two vertical plates distributed left and right are connected between the semi-annular supporting plate and the semi-annular mounting plate, circular through holes evenly arranged in the circumferential direction are opened on the semi-annular supporting plate, the pressure piece includes a pressure plate, a mounting groove is opened on one side of the support plate close to the center of the semi-annular bottom plate, and the pressure plate is rotatably installed in the mounting groove through a torsion spring shaft.

[0008] In one possible implementation, the locking member includes a connecting column, and two connecting columns distributed on the left and right are installed at the front end of the semi-annular bottom plate located on the rear side. The front end of the connecting column is truncated cone-shaped, and a connecting hole that slides forward and backward with the connecting column is provided on the semi-annular bottom plate located on the front side. Side grooves evenly arranged in the circumference are provided on the outer side of the connecting column, and a locking block is provided in the side groove. A slope is provided on the side of the locking block away from the connecting column, and a side spring is connected between the locking block and the wall of the side groove.

[0009] In one possible implementation, the connecting member includes a connecting rod hinged at both ends of a square plate, and two guide groove plates 2 distributed on the left and right sides of the screw drill bit are arranged below the rotating circular plate. The guide groove plate 2 is installed on the lower end of the rotating circular plate through the connecting plate, and a pin shaft 2 is rotatably installed at the lower end of the connecting rod to slide with the corresponding guide groove plate 2.

[0010] In one possible implementation, the limit assembly also includes a rotating ring rotatably installed between the inner fixed ring and the outer fixed ring, two circumferentially arranged limit blocks are provided at the lower end of the rotating ring, a limit rod located between the two limit blocks is installed at the position of the screw drill bit at the lower end of the rotating circular plate, and an adjustment part for adjusting the position of the limit block is provided on the rotating ring.

[0011] In one possible implementation, the adjustment member includes a circumferentially evenly arranged fixed hole groove opened at the lower end of the rotating ring and matched with the corresponding limit block, a bolt threadedly connected to the corresponding fixed hole groove is installed at the upper end of the limit block, the upper end of the bolt passes through the rotating ring and is threadedly connected to a nut, a top groove evenly arranged circumferentially is opened at the lower end of the inner fixed ring, a clamping block is slidably installed in the top groove, a top spring is connected between the clamping block and the groove wall of the top groove, and an inclined surface is arranged on one side of the lower end of the clamping block.

[0012] In one possible implementation, side plates arranged evenly in the circumference are installed on the outer side of the circular pressure plate, a fixing rod is installed between the outer fixing ring and the side plate, a fixed circular plate is arranged above the rotating circular plate, and connecting rods arranged evenly in the circumference are installed between the outer fixing ring, the inner fixing ring and the fixed circular plate. The support assembly includes an extension plate arranged evenly in the circumference installed on the outer side of the outer fixing ring, a guide column arranged evenly in the circumference and sliding up and down with the corresponding side plate and the extension plate is installed on the upper end of the processing table, the extension plate is hinged on one end away from the center of the outer fixing ring with a support rod, a guide groove plate 1 is installed at a position corresponding to the support rod on the upper end of the processing table, a pin shaft 1 slidingly connected to the corresponding guide groove plate 1 is hinged at the lower end of the support rod, and a top plate is installed on the upper ends of the circumferentially arranged guide columns, and a hydraulic cylinder with a pushing end connected to the fixed circular plate is installed on the top plate.

[0013] In one possible implementation, the pushing member includes a cylinder installed on the upper end of a rotating circular plate, the lower end of a pushing section of the cylinder slides through the rotating circular plate and is connected to a square plate, two guide rods are installed on the upper end of the square plate and are distributed left and right about the cylinder and are slidably connected to the rotating circular plate up and down, a driving assembly for driving the rotating circular plate and the rotating ring to rotate is provided at the lower end of the fixed circular plate, the driving assembly includes a gear ring 1 installed on the upper end of the rotating circular plate, a gear 1 is meshed on the outer side of the gear ring 1, the upper end of the gear 1 is connected to the driving shaft of the motor 1, a gear ring 2 is installed on the upper end of the rotating ring, a gear 2 is meshed on the outer side of the gear ring 2 and is rotatably installed on the upper end of the outer fixed ring, the upper end of the gear 2 is connected to the driving shaft of the motor 2, and both the motor 1 and the motor 2 are installed on the fixed circular plate.

[0014] In one possible implementation, a locking piece that locks with a corresponding guide groove plate is provided at the lower end of the support rod, and the locking piece includes a locking plate installed on the side of the lower end of the support rod away from the corresponding guide column, and a sliding groove that is slidably connected to the corresponding locking plate is provided on the guide groove plate, and rectangular grooves are provided on the upper and lower sides of the locking plate away from one end of the support rod, a triangular block is provided in the rectangular groove, and telescopic springs are provided in the triangular block and the corresponding rectangular groove, and the inclined surface of the triangular block faces away from the corresponding support rod.

[0015] Beneficial effects of the present invention: 1. The fixing unit adopted in the present invention can implement internal and external stable fixation of the fire hydrant bolt body through the external clamping component and the internal clamping component, wherein the external clamping component can not only apply a circumferentially uniform external clamping force to the outside of the bolt body, but also provide support for the drilling points at the bolt body interface, effectively avoiding deformation of the bolt body due to local stress concentration during drilling, and at the same time limiting the rotation of the bolt body. The internal clamping component can cooperate with the control part to further clamp the inner wall of the bolt body, ensuring that the bolt body is accurately and stably fixed, thereby improving the drilling quality and efficiency.

[0016] 2. The processing unit adopted in the present invention can use the limit assembly to accurately control the rotation angle of the screw drill bit, complete the forming of the threaded holes of the bolt body one by one, ensure that the angle and position of each threaded hole meet the requirements and are consistent, reduce the deviation caused by manual operation or mechanical error, and is conducive to improving the processing accuracy and quality, and improving the overall production efficiency.

[0017] 3. The present invention connects the processing unit and the processing table through a supporting assembly. The stable quadrangular pyramid structure formed by the three helps to improve the connection stability between the processing unit and the processing table, and the overall structural stability is improved. In addition, the connecting parts and the rotating circular plate and square plate form a plurality of triangular structures, which is conducive to further increasing the stability of the screw drill bit during the moving drilling process, thereby enhancing the forming quality of the threaded hole.

[0018] In addition to the technical problems solved by the embodiments of the present invention described above, the technical features that constitute the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions, other technical problems that can be solved by an automatic drilling device for fire hydrants provided by an embodiment of the present application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail in the specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the main stereoscopic structure of the present invention.

[0021] Figure 2 It is a schematic diagram of the three-dimensional structure of the processing unit in the present invention.

[0022] Figure 3 for Figure 2 A magnified schematic diagram of area A in the middle.

[0023] Figure 4 It is a schematic diagram of the three-dimensional structure of the limiting component and the connecting piece in the present invention.

[0024] Figure 5 It is a schematic diagram of the three-dimensional structure of the driving assembly and the pushing member in the present invention.

[0025] Figure 6 It is a schematic diagram of the three-dimensional structure of the adjusting member in the present invention.

[0026] Figure 7 It is a schematic diagram of the three-dimensional structure of the fixing unit in the present invention.

[0027] Figure 8 for Figure 7 A magnified schematic diagram of area B.

[0028] Fig. 9 It is a schematic diagram of the three-dimensional structure of the inner and outer clamping components of the present invention.

[0029] Fig.10 It is a schematic diagram of the cross-sectional three-dimensional structure of the control member and the inner clamping assembly in the present invention.

[0030] Fig.11 It is a partial cross-sectional view of the inner clamping assembly in the present invention.

[0031] In the figure: 1, processing table; 11, guide column; 12, guide groove plate 1; 2, fixing unit; 21, bottom column; 211, fixing sleeve; 212, arc clamping plate; 213, control plate; 214, connecting spring; 221, semi-circular bottom plate; 222, support plate; 223, vertical plate; 224, semi-circular supporting plate; 225, pressing plate; 226, circular through hole; 231, connecting column; 232, locking block; 233, side spring; 3, processing unit; 31, rotating circular plate; 311, circular pressing plate; 312, fixing rod; 314, pushing column; 315, square plate; 316, screw Drill bit; 318, connecting rod; 319, guide groove plate 2; 32, inner fixing ring; 321, cylinder; 322, guide rod; 323, limit rod; 33, outer fixing ring; 331, support rod; 332, locking plate; 334, triangular block; 335, telescopic spring; 336, hydraulic cylinder; 34, fixed circular plate; 341, connecting rod; 35, rotating ring; 351, limit block; 352, fixed hole groove; 354, clamping block; 355, top spring; 356, gear ring 1; 357, gear 1; 358, motor 1; 359, gear ring 2; 361, gear 2; 362, motor 2. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described below, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0033] See also Figure 1 A fire hydrant automatic drilling device comprises a processing table 1, wherein a fixing unit 2 for fixing a fire hydrant body is arranged at the upper end of the processing table 1, and a processing unit 3 is arranged above the fixing unit 2.

[0034] See also Figure 1 , Figure 7 , Fig. 9 , Fig.10 and Fig.11The fixing unit 2 includes a bottom column 21 installed at the center of the upper end of the processing table 1, and an inner clamping assembly is arranged on the upper end of the bottom column 21. The inner clamping assembly includes a fixing sleeve 211 installed on the upper end of the bottom column 21. The outer side of the fixing sleeve 211 is provided with arc grooves evenly arranged in the circumference, and an arc clamping plate 212 is arranged on the outer side of the arc groove. A control plate 213 slidably connected to the fixing sleeve 211 is installed on the inner side of the arc clamping plate 212. A slope is arranged on the side of the control plate 213 away from the corresponding arc clamping plate 212, and two connecting springs 214 distributed up and down about the control plate 213 are connected between the arc clamping plate 212 and the corresponding arc groove wall.

[0035] See also Figure 1 , Figure 7 , Fig. 9 , Fig.10 and Fig.11 The front and rear sides of the bottom column 21 are both provided with external clamping components, and the external clamping components include a semi-annular bottom plate 221 slidably connected to the processing table 1 front and back, and a support plate 222 arranged evenly in the circumferential direction is installed on the upper end of the semi-annular bottom plate 221, and a semi-annular mounting plate is installed on the upper end of the support plate 222 arranged circumferentially, and a semi-annular mounting plate is installed on the upper end of the semi-annular mounting plate, and a semi-annular supporting plate 224 is provided on the upper end of the semi-annular mounting plate, and two vertical plates 223 distributed left and right are connected between the semi-annular supporting plate 224 and the semi-annular mounting plate, and circular through holes 226 arranged evenly in the circumferential direction are opened on the semi-annular supporting plate 224, and a pressing piece is provided on the side of the support plate 222 close to the center of the semi-annular bottom plate 221, and the pressing piece includes a pressing plate 225, and a mounting groove is opened on the side of the support plate 222 close to the center of the semi-annular bottom plate 221, and the pressing plate 225 is rotatably installed in the mounting groove through a torsion spring shaft.

[0036] During specific work, the fire hydrant body can first be passed through the inner clamping assembly and the bottom column 21 from top to bottom in sequence until the bolt body is placed on the upper end of the processing table 1. At this time, the bottom column 21 and the inner clamping assembly are both located inside the bolt body, and the bottom column 21 can be pre-positioned for the placement of the bolt body. In the initial state, the front and rear two outer clamping assemblies are both located away from the bottom column 21. After the bolt body is placed, the front and rear two outer clamping assemblies can be manually pushed to move toward each other synchronously, and the semi-annular bottom plates 221, the semi-annular mounting plates and the semi-annular supporting plates 224 on the front and rear sides move toward each other synchronously until they are tightly fitted to form a complete annular shape. The front and rear two semi-annular bottom plates 221 can be pressed against the interface at the lower end of the bolt body at the same time, and the bolt body is just located between the front and rear two outer clamping assemblies The support plate 222, the pressure piece and the vertical plate 223 are all located on the outside of the bolt body. The pressure plate 225 is tilted toward the direction of the bolt body under the action of the torsion spring shaft. When the support plate 222 moves, it can drive the corresponding pressure plate 225 to press against the bolt body to preliminarily fix the bolt body on the upper end of the processing table 1. In addition, the front and rear vertical plates 223 located on the right side can just press against the front and rear sides of the connection port of the water suction pipe of the bolt body, thereby limiting the rotation of the bolt body. At the same time, the semi-annular support plate 224 at the lower end of the upper end interface of the bolt body can provide support for the drilling point to prevent the upper end interface of the bolt body from being deformed by the drilling force. The circular through hole 226 on the semi-annular support plate 224 is just opposite to the corresponding drilling point, ensuring the smooth progress of subsequent drilling operations.

[0037] See also Figure 7 , Figure 8 and Fig. 9 A locking piece is provided between the front and rear two outer clamping assemblies, and the locking piece includes a connecting column 231. Two connecting columns 231 distributed left and right are installed at the front end of the semi-annular bottom plate 221 located on the rear side. The front end of the connecting column 231 is truncated. The semi-annular bottom plate 221 located on the front side is provided with a connecting hole that slides forward and backward with the connecting column 231. The outer side of the connecting column 231 is provided with side grooves evenly arranged in the circumferential direction. A locking block 232 is provided in the side groove. The locking block 232 is provided with an inclined surface on the side away from the connecting column 231. A side spring 233 is connected between the locking block 232 and the wall of the side groove.

[0038] As the front and rear semi-annular bottom plates 221 move toward each other, the semi-annular bottom plate 221 located on the rear side drives the left and right connecting posts 231 to gradually insert into the corresponding connecting holes, and the inclined surface of the locking block 232 is squeezed and moves into the side groove by compressing the side spring 233 until the connecting post 231 drives the circumferentially arranged locking block 232 to pass through the connecting hole. At this time, the locking block 232 is disengaged from the connecting hole and can move outward under the action of the rebound force of the side spring 233. Under the action of the connecting post 231, the connecting hole and the locking block 232, the front and rear semi-annular bottom plates 221 are mutually locked, thereby ensuring that the front and rear external clamping assemblies can stably clamp the bolt body externally. When the external clamping assembly needs to be released later, the circumferentially arranged locking block 232 can be pressed into the corresponding side groove with the help of external force to ensure that the connecting post 231 can smoothly disengage from the connecting hole.

[0039] See also Figure 1 , Figure 2 , Figure 4 , Fig.10 and Fig.11 The processing unit 3 includes a rotating circular plate 31 arranged above the processing table 1, the rotating circular plate 31 is rotatably mounted on the inner fixed ring 32, an outer fixed ring 33 is arranged on the outer side of the inner fixed ring 32, a circular pressure plate 311 is arranged at the lower end of the rotating circular plate 31, side plates arranged uniformly in the circumferential direction are installed on the outer side of the circular pressure plate 311, a fixing rod 312 is installed between the outer fixed ring 33 and the side plate, a control member for controlling the synchronous movement of the circumferentially arranged arc clamping plate 212 is arranged at the lower end of the circular pressure plate 311, and the control member includes a matching column mounted at the lower end of the circular pressure plate 311 and matching with the inner annular surface of the fire hydrant body, and a pushing column 314 in a truncated cone shape and matching with the circumferentially arranged control plate 213 is installed at the lower end of the matching column.

[0040] See also Figure 1 , Figure 2 and Figure 4 A fixed circular plate 34 is arranged above the rotating circular plate 31, and connecting rods 341 arranged uniformly in the circumferential direction are installed between the outer fixed ring 33, the inner fixed ring 32 and the fixed circular plate 34. A supporting assembly is arranged between the processing unit 3 and the processing table 1, and the supporting assembly includes an extension plate arranged uniformly in the circumferential direction installed on the outside of the outer fixed ring 33, and a guide column 11 arranged uniformly in the circumferential direction and slidingly cooperating with the corresponding side plate and the extension plate is installed on the upper end of the processing table 1. A support rod 331 is hinged at one end of the extension plate away from the center of the outer fixed ring 33, and a guide groove plate 12 is installed at a position corresponding to the support rod 331 at the upper end of the processing table 1, and a pin shaft 1 that is slidably connected to the corresponding guide groove plate 12 is hinged at the lower end of the support rod 331.

[0041] See also Figure 1 , Figure 2 , Figure 3 , Figure 4, Fig.10 and Fig.11 The support rod 331 has a locking piece at its lower end that is locked with the corresponding guide groove plate 12. The locking piece includes a locking plate 332 installed on the side of the lower end of the support rod 331 away from the corresponding guide column 11. The guide groove plate 12 is provided with a sliding groove that is slidably connected to the corresponding locking plate 332. The locking plate 332 is provided with rectangular grooves on the upper and lower sides of the end away from the support rod 331. A triangular block 334 is provided in the rectangular groove. The triangular block 334 and the corresponding rectangular groove are provided with a telescopic spring 335. The inclined surface of the triangular block 334 faces away from the corresponding support rod 331. The upper ends of the guide columns 11 arranged circumferentially are jointly installed with a top plate, and a hydraulic cylinder 336 with a pushing end connected to the fixed circular plate 34 is installed on the top plate.

[0042] After the outer clamping of the bolt body is completed, the fixed circular plate 34 can be pushed downward by the hydraulic cylinder 336, and the fixed circular plate 34 drives the outer fixed ring 33 and the inner fixed ring 32 to move downward synchronously through the circumferentially arranged connecting rod 341, and the rotating circular plate 31 moves downward synchronously accordingly. The outer fixed ring 33 also drives the circular pressure plate 311 to move downward synchronously through the circumferentially arranged fixing rod 312. The guide column 11 provides guiding support for the downward movement of the outer fixed ring 33 and the circular pressure plate 311 through the up and down sliding cooperation between the extension plate and the side plate. In this process, the outer fixed ring 33 can drive the circumferentially arranged extension plate and the upper end of the support rod 331 hinged thereto to move downward synchronously, and the lower end of the support rod 331 can move outward along the corresponding guide groove plate 12 through the pin shaft 1. The outer fixed ring 33, the support rod 331, the guide groove plate 12 and the processing table 1 form a stable quadrangular platform structure, which is beneficial to improving the structural stability of the processing unit 3 during the overall downward movement.

[0043] In addition, the support rod 331 can drive the locking plate 332 to move outward along the guide groove plate 12 synchronously. When the outer fixing ring 33 moves down to a suitable position, the support rod 331 just drives the locking plate 332 to pass through the sliding groove on the corresponding guide groove plate 12. In this process, the inclined surface of the triangular block 334 is squeezed and moves into the corresponding rectangular groove by compressing the telescopic spring 335. After the locking plate 332 drives the triangular block 334 to pass through the corresponding sliding groove, the triangular block 334 can return to the original position under the action of the rebound force of the telescopic spring 335. The locking plate 332 and the support rod 331 can be fixed on the guide groove plate 12 as a whole through the cooperation of the triangular block 334 and the guide groove plate 12, thereby ensuring that the processing unit 3 is locked in a suitable position as a whole. When the processing unit 3 is subsequently moved up and reset, the upper and lower triangular blocks 334 on the corresponding locking plate 332 can be pressed toward each other with the help of external force, so that the triangular blocks 334 are placed in the corresponding rectangular grooves, ensuring that the locking plate 332 can smoothly disengage from the sliding groove on the guide groove plate 12.

[0044] In addition, when the circular pressure plate 311 moves downward, it also drives the matching column and the pushing column 314 to be inserted downward into the bolt body synchronously. The pushing column 314 gradually enters the fixed sleeve 211 and squeezes the inclined surface of the control plate 213 to make the control plate 213 move outward along the fixed sleeve 211. The circumferentially arranged arc-shaped clamping plates 212 move outward synchronously with the corresponding control plates 213 to press against the inner wall of the bolt body by stretching the connecting springs 214, thereby completing the internal clamping of the bolt body. At this time, the circular pressure plate 311 is just pressed on the upper end of the bolt body, and the outer fixing ring 33 reaches the appropriate position synchronously. With the cooperation of the circular pressure plate 311, the control part and the internal clamping assembly, the bolt body is more firmly fixed to the upper end of the processing table 1.

[0045] See also Figure 1 , Figure 2 , Figure 4 and Figure 5 The rotating circular plate 31 is provided with a square plate 315 at the lower end, and a driving part and a screw drill 316 are installed at the lower end of the square plate 315 through a mounting member. The circular pressing plate 311 is provided with processing through grooves evenly arranged in the circumferential direction. A connecting member is provided between the square plate 315 and the rotating circular plate 31. The connecting member includes a connecting rod 318 hinged at both ends of the square plate 315. Two guide groove plates 319 distributed on the left and right sides of the screw drill 316 are provided below the rotating circular plate 31. The guide groove plate 319 is installed on the rotating circular plate through a connecting plate. The lower end of the connecting rod 318 is rotatably mounted with a pin shaft 2 which is slidably matched with the corresponding guide groove plate 2 319. The upper end of the rotating circular plate 31 is provided with a pushing member for pushing the square plate 315 and the screw drill bit 316 to move downward. The pushing member includes a cylinder 321 installed on the upper end of the rotating circular plate 31. The lower end of the pushing section of the cylinder 321 slides through the rotating circular plate 31 and is connected to the square plate 315. The upper end of the square plate 315 is provided with two guide rods 322 which are distributed left and right about the cylinder 321 and are slidably connected to the rotating circular plate 31 up and down.

[0046] See also Figure 1 , Figure 2 , Figure 4 and Figure 5 The mounting parts include mounting blocks installed on both the front and rear sides of the upper end of the driving part, the mounting blocks are installed on the lower end of the square plate 315 by bolts, and two inclined profiles distributed about the driving part are installed on the lower end of the square plate 315. The horizontal section on the lower side of the inclined profile can provide support for the bottom end of the driving part, and the horizontal section on the lower side of the inclined profile is threadedly installed with bolts connected to the driving part thread. The inclined profile located on the right side is rotatably installed with cross bars on both the front and rear sides of the inclined section, and the other end of the cross bar is fixed to the inclined profile on the other side by bolts, so that the driving part and the screw drill 316 are stably installed on the lower end of the square plate 315, and different types of drills can also be replaced. The driving part is a prior art, which controls the screw drill 316 to work.

[0047] In the process of rotating the circular plate 31 downward, the square plate 315, the driving part, the screw drill bit 316, the connecting piece and the pushing piece are driven to move synchronously. When the outer fixing ring 33 reaches the appropriate position, the screw drill bit 316 is just located close to the bolt body. Then, the square plate 315, the mounting piece, the driving part and the screw drill bit 316 can be pushed downward as a whole by the cylinder 321. The left and right guide rods 322 move synchronously with the square plate 315 and support and guide the downward movement of the square plate 315. In this process, the square plate 315 can drive the left and right connecting rods 318 hinged thereto to move synchronously. The connecting rod 318 further moves downward, and the lower end of the connecting rod 318 can move through the pin shaft 2 along the corresponding guide groove plate 2 319 in the direction away from the screw drill bit 316. The cooperation between the connecting rod 318 and the guide groove plate 2 319 can provide further stable support for the downward movement of the square plate 315, ensuring that the screw drill bit 316 can stably complete the drilling operation. When the screw drill bit 316 is close to the corresponding processed through groove on the circular pressure plate 311, the driving unit drives the screw drill bit 316 to rotate rapidly, and cooperates with the continuous downward movement of the screw drill bit 316 to form the required threaded hole at the upper end interface of the bolt body.

[0048] See also Figure 4 , Figure 5 and Figure 6 The inner fixed ring 32 is provided with a limit assembly for limiting the rotation angle of the rotating circular plate 31. The limit assembly includes a rotating ring 35 rotatably installed between the inner fixed ring 32 and the outer fixed ring 33. The lower end of the rotating ring 35 is provided with two circumferentially arranged limit blocks 351. The position of the screw drill bit 316 at the lower end of the rotating circular plate 31 is provided with a limit rod 323 located between the two limit blocks 351. The rotating ring 35 is provided with an adjustment piece for adjusting the position of the limit block 351. The adjustment piece includes an opening at the lower end of the rotating ring 35. There are provided fixed hole grooves 352 which are evenly arranged in the circumference and matched with the corresponding limit blocks 351. A bolt which is threadedly connected to the corresponding fixed hole groove 352 is installed on the upper end of the limit block 351. The upper end of the bolt passes through the rotating ring 35 and is threadedly connected with a nut. The lower end of the inner fixed ring 32 is provided with top grooves which are evenly arranged in the circumference. A clamping block 354 is installed in the top groove for sliding up and down. A top spring 355 is connected between the clamping block 354 and the groove wall of the top groove. An inclined surface is provided on one side of the lower end of the clamping block 354. The number of top grooves is the same as the number of fixed hole grooves 352.

[0049] See also Figure 2 , Figure 4 , Figure 5 and Figure 6A driving assembly for driving the rotating circular plate 31 and the rotating ring 35 to rotate is provided at the lower end of the fixed circular plate 34, and the driving assembly includes a gear ring 1 356 installed at the upper end of the rotating circular plate 31, and a gear 1 357 is meshed on the outer side of the gear ring 1 356, and the upper end of the gear 1 357 is connected to the driving shaft of the motor 1 358, and a gear ring 2 359 is installed on the upper end of the rotating ring 35, and a gear 2 361 rotatably installed on the upper end of the outer fixed ring 33 is meshed on the outer side of the gear ring 2 359, and the upper end of the gear 2 361 is connected to the driving shaft of the motor 2 362, and the motor 1 358 and the motor 2 362 are both installed on the fixed circular plate 34.

[0050] In the initial state, the limit rod 323 is fitted to the rear end of the front limit block 351, and the angle between the front and rear limit blocks 351 is the same as the angle between the two adjacent drilling points. After the first threaded hole is formed, the square plate 315, the driving part and the screw drill bit 316 can be moved up and reset, and then the motor 2 362 can drive the gear 2 361 to rotate counterclockwise, and the gear ring 2 359 drives the rotating ring 35 to rotate clockwise. The two limit blocks 351 arranged circumferentially rotate synchronously with the rotating ring 35 in the clockwise direction until the limit block 351 originally located on the rear side rotates to fit with the rear end of the limit rod 323, and then the rotation of the rotating ring 35 can be paused, and then The motor 358 drives the gear 357 to rotate counterclockwise, and the gear ring 356 drives the rotating circular plate 31, the square plate 315, the driving part, the screw drill bit 316, the connecting piece, the pushing piece and the limit rod 323 to rotate clockwise as a whole until the limit rod 323 rotates again to conflict with the corresponding limit block 351. During this process, the limit rod 323 can compress the top spring 355 by squeezing the inclined surface of the block 354 and move it into the corresponding top groove. The block 354 that is separated from the limit rod 323 can move downward and reset under the action of the rebound force of the top spring 355, thereby limiting the limit rod 323 between the block 354 and the corresponding limit block 351.

[0051] At the same time, since the angle between the two limit blocks 351 is the same as the angle between the two adjacent drilling points, the rotation angle of the limit rod 323 is just the angle between the two adjacent drilling points. The mutual cooperation and limitation of the limit block 351 and the limit rod 323 can increase the accuracy of the rotation of the rotating circular plate 31, ensuring that the screw drill bit 316 can accurately perform the drilling operation on the required drilling point, and the second threaded hole can be formed in the same way as above. Similarly, the rotating ring 35 and the rotating circular plate 31 can be rotated successively, and the threaded holes at the remaining points can be accurately formed by the mutual cooperation between the limit block 351, the limit rod 323 and the clamping block 354. After the threaded holes at the upper end interface of the bolt body are all formed, the processing unit 3 can be moved up and reset, and the clamping of the inner clamping component, the outer clamping component and the bolt body can be released. Finally, the bolt body can be taken out, and the threaded hole at the lower end interface of the bolt body can be processed in the same way.

[0052] In addition, the limit block 351 is installed in the corresponding fixed hole groove 352 by the cooperation of bolts and nuts, and the number of fixed hole grooves 352 is greater than the number of actual drilling points. When the number of required drilling holes changes, the nut can be turned to flexibly remove the limit block 351 from the rotating ring 35, and the limit block 351 can be installed in the corresponding fixed hole groove 352 again in the same way as required, ensuring that the limit block 351 can limit the rotating circular plate 31 and the limit rod 323 with different rotation angles. In addition, the number of circular through holes 226 and processed through grooves is greater than the number of actual drilling points to meet the processing requirements of different drilling points.

[0053] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0054] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, an integral connection, or a sliding connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic drilling device for a fire hydrant, comprising a processing table (1), characterized in that: The upper end of the processing table (1) is provided with a fixing unit (2) for fixing the fire hydrant body, and a processing unit (3) is provided above the fixing unit (2); The fixing unit (2) comprises a bottom column (21) mounted at the center of the upper end of the processing table (1), an inner clamping assembly is arranged at the upper end of the bottom column (21), the inner clamping assembly comprises arc-shaped clamping plates (212) arranged evenly in the circumferential direction, and outer clamping assemblies are arranged on both the front and rear sides of the bottom column (21), the outer clamping assembly comprises support plates (222) arranged evenly in the circumferential direction, a pressing member is arranged on one side of the support plate (222) close to the center of the semi-circular bottom plate (221), and a locking member is arranged between the front and rear outer clamping assemblies; The processing unit (3) comprises a rotating circular plate (31) arranged above the processing table (1); a circular pressing plate (311) is arranged at the lower end of the rotating circular plate (31); a control member for controlling the synchronous movement of the circumferentially arranged arc clamping plates (212) is arranged at the lower end of the circular pressing plate (311); a square plate (315) is arranged at the lower end of the rotating circular plate (31); a driving unit and a screw drill bit (316) are installed at the lower end of the square plate (315) through a mounting member; processing through grooves evenly arranged in the circumferential direction are opened on the circular pressing plate (311); and a connecting member is arranged between the square plate (315) and the rotating circular plate (31); The rotating circular plate (31) is rotatably mounted on the inner fixed ring (32); an outer fixed ring (33) is arranged outside the inner fixed ring (32); a limiting assembly for limiting the rotation angle of the rotating circular plate (31) is arranged on the inner fixed ring (32); a pushing member for pushing the square plate (315) and the screw drill bit (316) downward is arranged at the upper end of the rotating circular plate (31); and a supporting assembly is arranged between the processing unit (3) and the processing table (1).

2. The automatic drilling device for fire hydrants according to claim 1, characterized in that: The inner clamping assembly also includes a fixed sleeve (211) installed at the upper end of the base column (21), the outer side of the fixed sleeve (211) is provided with an arc groove evenly arranged in the circumferential direction, the outer side of the arc groove is provided with an arc clamping plate (212), the inner side of the arc clamping plate (212) is provided with a control plate (213) slidably connected to the fixed sleeve (211), a side of the control plate (213) away from the corresponding arc clamping plate (212) is provided with an inclined surface, two connecting springs (214) distributed up and down about the control plate (213) are connected between the arc clamping plate (212) and the corresponding arc groove wall, and the control part includes a matching column mounted at the lower end of the circular pressure plate (311) and matched with the inner annular surface of the fire hydrant body, and a pushing column (314) in a truncated cone shape and matched with the circumferentially arranged control plate (213) is mounted at the lower end of the matching column.

3. The automatic drilling device for fire hydrants according to claim 1, characterized in that: The outer clamping assembly also includes a semi-annular bottom plate (221) connected to the processing table (1) for forward and backward sliding. The upper end of the semi-annular bottom plate (221) is provided with a support plate (222) evenly arranged in the circumferential direction. The upper ends of the support plates (222) arranged in the circumferential direction are jointly provided with a semi-annular mounting plate. The upper ends of the semi-annular mounting plates are provided with a semi-annular supporting plate (224). Two vertical plates (223) distributed left and right are connected between the semi-annular supporting plate (224) and the semi-annular mounting plate. The semi-annular supporting plate (224) is provided with circular through holes (226) evenly arranged in the circumferential direction. The pressing member includes a pressing plate (225). A mounting groove is provided on one side of the support plate (222) close to the center of the semi-annular bottom plate (221). The pressing plate (225) is rotatably installed in the mounting groove via a torsion spring shaft.

4. The automatic drilling device for fire hydrants according to claim 3 is characterized in that: The locking member comprises a connecting column (231), and two connecting columns (231) distributed left and right are installed at the front end of the semi-annular bottom plate (221) located at the rear side. The front end of the connecting column (231) is truncated. The semi-annular bottom plate (221) located at the front side is provided with a connecting hole that is slidably matched with the connecting column (231) in the front and rear directions. The outer side of the connecting column (231) is provided with a side groove evenly arranged in the circumferential direction. A locking block (232) is arranged in the side groove. A slope is arranged on the side of the locking block (232) away from the connecting column (231), and a side spring (233) is connected between the locking block (232) and the groove wall of the side groove.

5. The automatic drilling device for fire hydrants according to claim 1, characterized in that: The connecting member comprises a connecting rod (318) hinged at both left and right ends of a square plate (315); two guide groove plates (319) are arranged below the rotating circular plate (31) and are distributed on the left and right sides of the screw drill bit (316); the guide groove plates (319) are installed on the lower end of the rotating circular plate (31) through a connecting plate; and a pin shaft (318) is rotatably installed at the lower end of the connecting rod (318) and is slidably matched with the corresponding guide groove plates (319).

6. The automatic drilling device for fire hydrants according to claim 1, characterized in that: The limit assembly further comprises a rotating ring (35) rotatably mounted between the inner fixed ring (32) and the outer fixed ring (33); two circumferentially arranged limit blocks (351) are arranged at the lower end of the rotating ring (35); a limit rod (323) located between the two limit blocks (351) is installed at the position of the screw drill bit (316) at the lower end of the rotating circular plate (31); and an adjusting member for adjusting the position of the limit block (351) is arranged on the rotating ring (35).

7. The automatic drilling device for fire hydrants according to claim 6, characterized in that: The adjusting member comprises a fixing hole groove (352) which is evenly arranged in the circumferential direction and matched with the corresponding limit block (351) and is opened at the lower end of the rotating ring (35); a bolt which is threadedly connected to the corresponding fixing hole groove (352) is installed at the upper end of the limit block (351); the upper end of the bolt passes through the rotating ring (35) and is threadedly connected to a nut; a top groove which is evenly arranged in the circumferential direction is opened at the lower end of the inner fixing ring (32); a clamping block (354) is slidably installed in the top groove; a top spring (355) is connected between the clamping block (354) and the groove wall of the top groove; and a slope is arranged on one side of the lower end of the clamping block (354).

8. The automatic drilling device for fire hydrants according to claim 1, characterized in that: The outer side of the circular pressure plate (311) is provided with a side plate evenly arranged in the circumferential direction, a fixing rod (312) is installed between the outer fixing ring (33) and the side plate, a fixing circular plate (34) is arranged above the rotating circular plate (31), and connecting rods (341) evenly arranged in the circumferential direction are installed between the outer fixing ring (33), the inner fixing ring (32) and the fixing circular plate (34), the supporting assembly includes an extension plate evenly arranged in the circumferential direction installed on the outer side of the outer fixing ring (33), and an upper end of the processing table (1) is provided with a connecting rod evenly arranged in the circumferential direction and corresponding to the inner fixing ring (32). The side plate and the extension plate are slidably matched with the guide column (11), one end of the extension plate away from the center of the outer fixed ring (33) is hinged with a support rod (331), a guide groove plate (12) is installed at the position of the upper end of the processing table (1) corresponding to the support rod (331), the lower end of the support rod (331) is hinged with a pin shaft (1) slidably connected to the corresponding guide groove plate (12), and the upper ends of the guide columns (11) arranged in the circumferential direction are jointly installed with a top plate, and a hydraulic cylinder (336) is installed on the top plate, the pushing end of which is connected to the fixed circular plate (34).

9. The automatic drilling device for fire hydrants according to claim 1, characterized in that: The pushing member comprises a cylinder (321) mounted on the upper end of the rotating circular plate (31); the lower end of the pushing section of the cylinder (321) slides through the rotating circular plate (31) and is connected to the square plate (315); the upper end of the square plate (315) is mounted with two guide rods (322) distributed left and right about the cylinder (321) and connected to the rotating circular plate (31) in an up-and-down sliding manner; the lower end of the fixed circular plate (34) is provided with a driving assembly for driving the rotating circular plate (31) and the rotating ring (35) to rotate; the driving assembly comprises a driving rod (322) on the upper end of the rotating circular plate (31); A gear ring 1 (356) is installed, and a gear 1 (357) is meshed on the outer side of the gear ring 1 (356). The upper end of the gear 1 (357) is connected to the driving shaft of the motor 1 (358). A gear ring 2 (359) is installed on the upper end of the rotating ring (35). The outer side of the gear ring 2 (359) is meshed with a gear 2 (361) rotatably installed on the upper end of the outer fixed ring (33). The upper end of the gear 2 (361) is connected to the driving shaft of the motor 2 (362). The motor 1 (358) and the motor 2 (362) are both installed on the fixed circular plate (34).

10. The automatic drilling device for fire hydrants according to claim 8, characterized in that: The support rod (331) is provided with a locking piece at the lower end thereof for locking with the corresponding guide groove plate (12), the locking piece comprising a locking plate (332) installed at the side of the lower end of the support rod (331) away from the corresponding guide column (11), the guide groove plate (12) is provided with a sliding groove for sliding connection with the corresponding locking plate (332), the locking plate (332) is provided with rectangular grooves at the upper and lower sides of the end away from the support rod (331), a triangular block (334) is provided in the rectangular groove, a telescopic spring (335) is provided in the triangular block (334) and the corresponding rectangular groove, and the inclined surface of the triangular block (334) faces away from the corresponding support rod (331).

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