1582 results about "Pilot hole" patented technology

This invention relates to a reamer assembly (6) for enlarging a substantially horizontal pilot hole (14) in the ground to produce a bore hole (18), including a cutter (21) which is rotatable about an axis X-X. A gear box (20) is positioned on a first side of the cutter (21) for interacting with a drive shaft (33) which is rotated about the axis X-X by a drive apparatus (2) outside the pilot bore hole (14) and a body (15) positioned on a second side of the cutter (21) for transferring thrust from a thrust apparatus (4) outside of the enlarged bore hole (18) to the cutter (21).

The invention discloses a fabricated building based on a BIM technology and a construction method, and relates to the technical field of fabricated buildings. The structure comprises a floor and a prefabricated wall body, multiple sets of embedded steel bars are arranged at the top of the floor, the outer sides of the embedded steel bars are sleeved with positioning assemblies, multiple sets of assembling holes are formed in the bottom of the prefabricated wall body, the inner diameter of each assembling hole is larger than the outer diameter of each embedded steel bar, and each positioning assembly comprises a positioning outer cylinder and an adjusting inner cylinder; and the adjusting inner cylinder is sleeved on the embedded steel bar. A limiting piece is controlled to slide downwards along a guide hole, at the moment, a telescopic rod can slide in the direction of a positioning outer cylinder, and along with continuous descending of a prefabricated wall, the lower half portion of the hinged position of a positioning supporting rod continuously swings inwards, the upper half portion of the hinged position of the positioning supporting rod swings outwards, and the telescopic rod slides into a sliding cavity; therefore, the gap can be adjusted while the position stability of the prefabricated wall is guaranteed, a cushion block does not need to be independently arranged, construction is easy, and the construction precision is high.

The invention relates to an expanding drill device for expanding a pilot bore produced from a starting point to a target point in the ground along a specified drilling line by moving the expanding drill device (10) along the specified drilling line in order to produce a bore in the ground or in rock for introducing a pipeline or a supporting system into the expanded bore, comprising: a housing (11); a drill head (14) that has a cutting wheel (15) which is arranged on the drill side (21) of the expanding drill device (10) so as to be rotatably mounted and driven about a rotational axis and relative to the housing and on which at least one drill tool (16) for loosening the ground or the rock is arranged; and a drill-side connection for producing a connection to a pipe section located in the pilot bore on the drill side, wherein the drill side (21) centrally has at least one receiving chamber (24) for the loosened ground or the loosened rock, said receiving chamber being connected to a material conveyor device of the expanding drill device (10) for the loosened ground or the loosened rock via at least one removal opening (30); the drill side (21) has at least one drill chamber (38) that is equipped with the cutting wheel (15), which is arranged about the receiving chamber (24); the cutting wheel (15) has an annular design and is rotatably arranged about the central receiving chamber (24); and the receiving chamber (24) is connected to the drill chamber (38) via at least one conveyor opening (41) so that the loosened ground or the loosened rock can be conveyed into the receiving chamber (24) through the conveyor opening (41). According to the invention, at least one crusher (46) is provided in the drill chamber (38); the crusher (46) has crusher strips (49) on the rotatable cutting wheel (15) which move together with the cutting wheel (15) and crusher strips (47) on the receiving chamber (24) side facing the drill chamber (38) which are rigidly arranged together with the receiving chamber (24); and the crusher strips (47, 49) are arranged relative to one another such that a crusher gap (50) is produced between the crusher strips.

The disclosure describes an expanding drill device for expanding a pilot bore by moving the expanding drill device along a specified drilling line comprising: a housing; a drill head that has a cutting wheel which is arranged on the drill side of the expanding drill device so as to be rotatably mounted and driven about a rotational axis and relative to the housing and on which at least one drill tool for loosening the ground or the rock is arranged; and a drill-side connection for producing a connection to a pipe section located in the pilot bore on the drill side, wherein the drill side centrally has at least one receiving chamber for the loosened ground or the loosened rock, said receiving chamber being connected to a material conveyor device of the expanding drill device.

The utility model relates to the technical field of steel member machining, in particular to an adjustable bending device for steel member machining, which comprises a bending table, a controller is arranged on the front side of the bending table, a guide hole is arranged on the upper side of the bending table, and a lifting part for adjusting the bending thickness of a steel plate is arranged on the lower side of the bending table. An adjusting part used for adjusting the steel plate bending supporting distance is arranged on one side of the lifting part, a bending part is arranged on the upper side of the bending table, the lifting part comprises a guide assembly and a driving assembly, the guide assembly comprises a base, the base is arranged on the lower side of the bending table, a guide rod is arranged on the upper side of the base, and a moving plate is arranged on the outer side of the guide rod. And a limiting ring is arranged at the bottom end of the outer side of the guide rod. The problem that the bending device cannot be adaptively adjusted according to the thickness of a steel member is solved.

The invention discloses a solid waste recycling forming machining die, and relates to the technical field of bicycle production waste reutilization, the solid waste recycling forming machining die comprises a lower die mechanism, an upper die mechanism is arranged on the lower die mechanism, a pressing mechanism is arranged on the upper die mechanism, and a male die set is arranged in the middle of the bottom wall of an upper die base; the material pressing mechanism comprises a first spring and a material pressing plate which are arranged on the upper die base, and further comprises an elastic ejector block set arranged on the material pressing plate and a guide hole site set formed in the material pressing plate in an up-down penetrating mode. The die has the advantages that the same die carries out stepped continuous punching operation, punching stress can be reduced, and the probability of deformation of the disc brake during punching is reduced; residual stress existing in the punched disc brake disc can be redistributed through attaching and pressure maintaining, and the situation that due to the fact that large holes and small holes in the disc brake disc are evenly and densely distributed in position, local deformation is generated is prevented; and the elastic ejector block group applies uniform elastic pressing force to the disc brake disc, so that the probability of deformation of the disc brake disc during rigid demolding is reduced.

The invention relates to the technical field of fireproof equipment, in particular to an electrically-driven translation type heavy fireproof door which comprises a door body, a driving mechanism and a translation mechanism. The translation mechanism comprises a translation base and a nut sleeve, a mounting hole and a guide hole which penetrate through the two sides of the translation base are formed in the translation base, the nut sleeve and the lead screw form a thread transmission pair, the nut sleeve is rotatably mounted in the mounting hole, the guide rod is slidably connected in the guide hole, and a synchronous assembly is arranged in the translation base; when the door body moves to the tail end of the stroke, the circumferential constraint of the synchronous assembly on the nut sleeve is automatically relieved, so that the nut sleeve can freely rotate relative to the translation base. Therefore, the motor and the transmission system do not need to overcome the huge inertia of the door body to achieve forced stopping, the instantaneous load and locked-rotor risk of the motor are remarkably reduced, and meanwhile the impact stress borne by a mechanical transmission part at the terminal is greatly relieved.

The invention discloses a vertical shaft duct piece splicing device and a construction method thereof, and belongs to the technical field of vertical shaft engineering construction.The vertical shaft duct piece splicing device comprises a moving trolley, an overturning assembly, a clamping mechanism and a lifting mechanism, a support of the overturning assembly is vertically arranged on the moving trolley, and an overturning plate is rotationally connected to the support and provided with two guide columns; the overturning oil cylinder is used for driving the overturning plate to be switched between the horizontal state and the vertical state. A base of the clamping mechanism is provided with two guide holes for two guide columns to penetrate through, a clamping piece is rotationally arranged in a rotating groove of the base, an elastic piece is installed in the rotating groove and connected with the clamping piece, and when a duct piece is placed on a turnover plate in a horizontal state, the clamping piece can be pushed to be rotationally inserted into a hanging hole of the duct piece, and the elastic piece is stretched. The lifting mechanism is arranged on the overturning plate and can drive the base to drive the clamping piece to vertically move downwards. The vertical shaft duct piece splicing construction method adopts the vertical shaft duct piece splicing device. The device is high in stability, high in assembly precision and low in safety risk.

The invention provides a material ejecting mechanism for an automobile engine casting mold, and belongs to the technical field of metal casting, the material ejecting mechanism for the automobile engine casting mold comprises a rack and a table top located above the rack, a mold pressing mechanism is arranged on the upper surface of the table top, and when the mold pressing mechanism is closed, a mold cavity for pouring can be formed; a supporting plate capable of sliding up and down is arranged on the rack, an ejector rod is mounted on the supporting plate, a through hole is formed in the table top, a guide hole communicated with the through hole is formed in the mold pressing mechanism, and the ejector rod penetrates through the table top and the mold pressing mechanism through the guide hole and the through hole to reach the interior of the mold cavity and is used for demolding a casting; the ejector rod is driven by the supporting plate to move up and down, cold air is fed into the cavity through the circulation channel, the bottom of the casting and the ejector rod are cooled, and the situation that the bottom of the casting deforms when the ejector rod ejects the casting and the ejector rod deforms due to frequent heating is prevented.

The present invention discloses an iron tower installation device, comprising: a base platform, a main support, a first long screw, a fixed cylinder, a movable cylinder, a tensioning screw, and a steel wire rope. The fixed cylinder is installed by arranging a second long screw structure, and a movable cylinder that can slide up and down by being manipulated by the tensioning screw is arranged above the fixed cylinder. The top outer side of the fixed cylinder is fixedly connected with a first flange part, the top outer side of the movable cylinder is fixedly connected with a second flange part, and a crossbeam frame is fixedly connected between two main supports located on the same side. The top end of the steel wire rope is fixed to the crossbeam frame, and the bottom end of the steel wire rope is fixed to the first flange part after passing through a guide hole on the second flange part. By relying on the stabilizing force applied to the main support toward the center by the steel wire rope, the ability of the power iron tower to resist crosswinds can be improved.

The invention belongs to the technical field of forging, and particularly relates to an upper anvil block quick-changing structure and method for small-width concave gear forging of a large stepped shaft. The upper anvil block quick-changing structure comprises an upper anvil block and a base, and a mounting hole is formed in the top surface of the base; the mounting hole comprises a positioning hole section and a guide hole section coaxially and adjacently arranged at the upper end of the positioning hole section, the hole wall of the positioning hole section is perpendicular to the horizontal plane, and an upper end hole opening of the positioning hole section and a lower end hole opening of the guide hole section are the same in shape and size. The hole wall between the upper end orifice of the guide hole section and the upper end orifice of the positioning hole section is a transition inclined surface which is inclined upwards from inside to outside; the upper hammer head is inserted into the mounting hole, the upper hammer head is in clearance fit with the positioning hole section, and the connecting seats are arranged above the base at intervals. The upper anvil block and the base are assembled to form a low-gravity-center combined structure, the contact area between the upper anvil block and the feeding table is larger, and the conveying stability and safety of the upper anvil block are improved. The moving speed of the feeding table is increased, and the conveying and switching efficiency of the upper anvil blocks is improved.

To provide a countersinking method capable of stably providing a desired countersinking shape without damaging the surface of a workpiece irrespective of the hardness of the workpiece.SOLUTION: This countersinking method for forming a countersinking shape having a countersinking surface of a prescribed angle on a sheet metal workpiece (W) comprises: a first step of forming a lower hole (W1); a second step of plastically deforming one opening edge of the lower hole (W1) by a first punch (62) having an inclined part (621) of a first countersinking angle (θ1) larger than a prescribed angle (α) to form a primary countersinking surface (W21) of the first countersinking angle (θ1); and a third step of plastically deforming the primary countersinking surface (W21) by a second punch (63) having an inclined part (631) of a prescribed angle (α) to form a secondary countersinking surface (W31) of a prescribed angle (α) having an aperture equal to that (φW21) of the primary countersinking surface (W21).SELECTED DRAWING: Figure 3A

The invention relates to the technical field of graded reaming construction, and discloses a drilling construction method of a guide reaming barrel drill under a hard rock rotary excavating diversion hob, which comprises the following construction steps: 1) a drill rod is connected with a rotary excavating drilling bucket to drill in a soil layer to form a soil layer hole; (2) a rotary excavating drilling bucket is detached, and a rotary excavating barrel drill is connected to form a guide hole; (3) the rotary excavating drill barrel is detached, and the connecting reaming barrel drill and the lower guide barrel are detached; the reaming barrel drill is provided with a hob drill bit and a flow guide cavity, and the flow guide cavity forms a flow guide inlet and a flow guide outlet; the hole expanding drill barrel performs hole expanding drilling on the guide hole, and the guide hole is provided with a non-expanded section which is not subjected to hole expanding drilling; (4) the guide cylinder is dismantled, a non-expanded section of the reaming cylinder drill is used for reaming drilling till the guide hole is expanded to form a rock stratum hole, and the soil layer hole and the rock stratum hole are communicated up and down to form a pile hole; through staged drilling, accurate positioning of the guide hole, rock crushing of the hob drill bit and slurry circulation optimization of the flow guide cavity, the phenomenon of drill pasting is avoided, efficient reaming drilling is achieved, and the construction efficiency is improved.

A drill rod clamp, comprising a housing (5), a clamping device, a driving device (2), and a guiding device (3). The clamping device comprises a clamping assembly (1); the clamping assembly (1) is mounted inside the housing (5); the top of the clamping assembly (1) extends out of the top of the housing (5); the clamping assembly (1) is hinged to the inner wall of the housing (5); the driving device (2) is arranged inside the housing (5); the driving device (2) is hinged to the bottom of the clamping assembly (1); the driving device (2) can drive the clamping assembly (1) to open or close, so as to clamp or release a drill rod; the guiding device (3) is mounted on the back of the housing (5); and the drill rod can pass through the guiding device, such that the guiding device can guide and limit the drilling direction of the drill rod. Provision of the clamping device, the driving device (2) and the guiding device (3) enables the drill rod clamp to clamp drill rods of different specifications, thereby improving the applicability of the device. Provision of the guiding device (3) improves the hole position precision during construction, thus solving the problem of drill misalignment during pilot hole drilling.

The utility model relates to the technical field of saw blades, in particular to a saw blade convenient to mount and dismount, which is simple in structure, adopts a split type, can directly replace part of the saw blade with damaged saw teeth, and does not enable an output shaft of a cutting machine to rotate in the replacement process. Comprising a mounting ring fixed to an output shaft, a plurality of mounting grooves are formed in the outer surface of the mounting ring in a circumferential array shape, a saw blade is placed in each mounting groove, a fixing ring is fixed to one side of the mounting ring, a driving mechanism is arranged in the fixing ring, and a driving block moving in the radial direction of the mounting ring is arranged at the output end of the driving mechanism; a through hole is formed in the mounting groove and communicates with the fixing ring, a pressing plate is slidably connected into the through hole and fixedly connected with a connecting plate, a guide hole is formed in the connecting plate, and a guide shaft penetrating through the guide hole is fixed to the driving block.

The utility model relates to the technical field of foundation pile impact devices, in particular to a static pressure immersed tube method plain soil compaction pile impact device which comprises two cross beams which are symmetrical to each other and fixedly installed on an external pile press, and U-shaped frames are fixedly installed on rod bodies at the ends of the two cross beams. A supporting frame is rotationally connected between the left side plate body and the right side plate body of the U-shaped frame through a rotating shaft, a driving motor is coaxially arranged at the end of the rotating shaft, a first hydraulic cylinder is fixedly installed on the top plate body of the supporting frame, a lower pressing disc is arranged at the tail end of a telescopic shaft of the first hydraulic cylinder, and second hydraulic cylinders are fixedly installed on the left side plate body and the right side plate body of the supporting frame. A clamping plate is arranged at the tail end of a telescopic shaft of the second hydraulic cylinder, guide holes are formed in the left side plate body and the right side plate body of the supporting frame, guide rods are fixedly installed on the side faces of the clamping plate, and the guide rods penetrate through the guide holes and are in sliding connection with the guide holes. According to the utility model, angle adjustment and clamping guide operation are facilitated, and dense pile impact is facilitated.

The invention relates to the technical field of drilling and tapping equipment, in particular to mop rod drilling and tapping equipment which comprises a drilling machine head and a tapping machine head, and the drilling machine head and the tapping machine head are oppositely arranged left and right. The drilling machine comprises a drilling machine head, a tapping machine head, a driving device, a feeding device, a reset device, a base, supporting tables, a barrel and an electric clamp, two sets of strip-shaped guide holes with inclined angles are formed in the base, the two sets of supporting tables are slidably installed on the two sets of strip-shaped guide holes through the reset device respectively, and the drilling machine head and the tapping machine head are installed on the outer side walls of the two sets of supporting tables respectively. The barrel is rotationally installed on the base, the multiple sets of electric clamps are arranged on the outer side wall of the barrel in the circumferential direction at equal intervals, and a driving device is arranged on the base; the mop rod drilling and tapping device is convenient to realize automatic moving and conveying of mop rods and is matched with drilling of the drilling machine head and tapping of the tapping machine head, the reliability of action control is improved, the mop rod drilling and tapping device is suitable for large-batch mop rod drilling and tapping processing, the working efficiency is improved, and the processing quality is ensured.

This invention relates to a reamer assembly (6) for enlarging a substantially horizontal pilot hole (14) in the ground to produce a bore hole (18), including a cutter (21) which is rotatable about an axis X-X. A gear box (20) is positioned on a first side of the cutter (21) for interacting with a drive shaft (33) which is rotated about the axis X-X by a drive apparatus (2) outside the pilot bore hole (14) and a body (15) positioned on a second side of the cutter (21) for transferring thrust from a thrust apparatus (4) outside of the enlarged bore hole (18) to the cutter (21).

The utility model discloses an impeller slope hole processing jig, which relates to the field of impeller processing, and comprises an impeller, a support seat, an impeller positioning shaft, a balance hole drill jig and an opening pressure plate, the impeller is sleeved at one end of the impeller positioning shaft through a hub, and the other end of the impeller positioning shaft is matched and positioned with the support seat; the balance hole drill jig is arranged on the hub in a sleeving mode and pressed through the open pressing plate, and then the open pressing plate and the supporting base are locked and fixed through the locking bolt. The lower surface of the balance hole drilling jig and a cover plate inclined face on the impeller rear cover plate are attached and positioned, a guide hole is formed in the balance hole drilling jig in the axial direction of the impeller in a penetrating mode, and a machining hole is drilled in the corresponding position of the cover plate inclined face through the guide hole. The mode that a balance hole in the inclined face of the impeller is drilled through manual visual positioning operation is omitted, and operation difficulty and labor intensity are reduced; the machining and positioning mode of the balance hole in the inclined face of the impeller is changed, and controllability and quality consistency of hole position precision of the balance hole are improved.

The invention relates to the technical field of graded chambering construction, and discloses a hard rock rotary excavating diversion hob lower guide chambering barrel drill structure which is characterized by comprising a chambering barrel drill and a lower guide barrel which are connected to a drill rod. The diameter of the lower guide cylinder is the same as that of the guide hole; the diameter of the reaming cylinder drill is greater than that of the guide hole; a plurality of hob drill bits are arranged at the bottom of the reaming barrel drill, and the reaming barrel drill is provided with a flow guide cavity; a plurality of pressure relief holes are formed in the top of the reaming barrel drill, communicate with the top of the inner surrounding cavity and are isolated from the flow guide cavity; the flow guide cavity penetrates through the bottom of the reaming barrel drill to form a plurality of flow guide inlets and penetrates through the top of the reaming barrel drill to form a plurality of flow guide outlets; and in the reaming drilling process of the reaming barrel drill in the guide hole, slurry enters the flow guide cavity from the flow guide inlet and is upwards sprayed out from the flow guide cavity. Through the guiding of the lower guide cylinder, the optimization of the hob drill bit and the flow guide of the slurry, the overall effect of reaming and drilling is obviously improved.

The utility model belongs to the technical field of trepanning device, and disclose multifunctional integrated woodwork three-in-one connecting piece trepanning device, including the basic support of cross section is L type, the basic support is installed with hand twist and is pressed tightly spare, the basic support one side is connected with the positioning template through first screw, the positioning template is connected with eccentric wheel punch -out template through second screw, the eccentric wheel punch -out template is opened with two different hole diameter holes, the basic support is connected with hole distance template through third screw away from the one side of positioning template, the positioning template still can be connected with hinged hole opening positioner through fourth screw, can respectively constitute four kinds of specifications three-in-one eccentric wheel hole trepanning device, hinged hole trepanning device, three-in-one embedded part pilot hole positioner, inclined hole positioner, cabinet door adjusting clamp etc., realize a set of tools, multiple purposes, need not to replace the tool repeatedly, be favorable to the use of wood working operation.

The utility model relates to a top plate shielding strip fast-assembling device suitable for a control box, which comprises a bottom plate, a vertical guide device arranged on the bottom plate, a top plate connected with the upper end of the vertical guide device, a driving device arranged on the top plate, a guide hole arranged on the top plate, and a working end of the driving device extending into the guide hole. The working end of the driving device is connected with an upper pressing plate, a pressing plate is installed at the lower end of the upper pressing plate, a downward detection area of the pressing plate forms a machining space, guiding devices are distributed on the two sides of the upper pressing plate in a mirror image mode, the guiding devices are movably connected with vertical guiding devices, and a plurality of positioning devices are installed on the edge, corresponding to the machining space, of the bottom plate. And a pressing plate frame is movably arranged between the bottom plate and the pressing plate. Therefore, manual-free automatic force application can be achieved through the driving device, it is ensured that the force application strength meets the embedding requirement of the top plate shielding strip, and the control box cannot be accidentally extruded. And the vertical guide device is arranged, so that the upper pressing plate and the pressing plate can be assisted to move forwards smoothly.

The utility model relates to the technical field of mechanical part machining, in particular to a guide hole ring die structure segmented adjusting device which comprises a supporting base, an adjusting assembly is installed on the upper surface of the inner side of the supporting base, limiting assemblies are installed on the two sides of the top of the adjusting assembly, and supporting blocks are installed on the two sides of the top of the supporting base. According to the improved segmented adjusting device, the two sides of a material can be limited through a limiting assembly, and the top of the material is pressed through a second telescopic rod and a pressing disc, so that the material is vertically limited, and the stability of the material is further improved; according to the material limiting device, the situation that the machining quality is reduced due to position deviation of materials is effectively avoided, position adjusting work can be carried out while limiting is carried out, limiting does not need to be canceled to adjust the positions of the materials, labor force is reduced, meanwhile, time cost is saved, and therefore the production efficiency is improved.

The utility model relates to the technical field of bottle preform molds, in particular to a bottle preform mold positioning device which comprises a movable mold and a positioning assembly. The positioning assembly comprises a mounting shell, a fixed mold, a guide column, a reset spring and an adjusting component, during mold closing, the movable mold is driven by an injection molding machine to approach the fixed mold, then the movable mold drives the guide column to extend into the guide hole, and the end of the guide column is conical, so that the guide column can conveniently extend into the guide hole; even if a certain position deviation exists between the fixed mold and the movable mold initially, the conical structure at the end part of the guide column guides the fixed mold to move until the fixed mold is aligned with the fixed mold, and the mold core on the movable mold completely corresponds to the mold cavity on the fixed mold, so that accurate positioning and stable mold closing of the movable mold and the fixed mold are realized, the mold closing precision is improved, and the production efficiency is improved. And the risk of mold damage is also reduced.

This invention relates to the field of construction technology, specifically to a method for pre-drilling with a large-diameter down-the-hole hammer in conjunction with vibratory compaction. The method includes: collecting soil samples at different depths at the pre-drilling site using a sampling drill; analyzing the geology at these depths using a soil analyzer; checking the functions and parameters of the large-diameter down-the-hole hammer and auxiliary automatic pre-drilling equipment; and pre-setting the parameters of the automatic pre-drilling equipment based on the geological data from the different depths at the pre-drilling site. During construction, the parameters of the automatic pre-drilling equipment are adjusted according to the actual conditions at the pre-drilling site. This invention uses a motion execution module to input commands to a frequency converter, which in turn controls the actuator to move the pile driver and drive the down-the-hole hammer for auxiliary pre-drilling. This achieves a fully automated construction control system for large-diameter down-the-hole hammer pre-drilling, reducing manpower consumption and improving efficiency.

The utility model relates to the technical field of spring assembling devices, in particular to a multifunctional spring assembling device for a plastic pump head, which comprises a workbench, a support arranged at the top of the workbench, a limit guide mechanism arranged at the top of the support and capable of longitudinally reciprocating, and a feeder longitudinally arranged at the bottom of the limit guide mechanism. A guide hole is longitudinally formed in the feeder, and a feeding pipe capable of communicating with the interior of the guide hole is obliquely arranged on one side of the feeder; a second sleeve capable of longitudinally moving along the interior of the guide hole is arranged at the top of the feeder, a second elastic piece is arranged outside the second sleeve, and the second elastic piece can drive the second sleeve to reset; and a guide rod capable of longitudinally moving is arranged in the second sleeve. The spring can be accurately installed in the pump head, bending deformation caused by non-concentrated stress during installation of the spring is avoided, and therefore the assembly quality of the pump head is guaranteed.

The utility model discloses a small caliber high pressure bellows safety valve relates to safety valve technical field, solves the failure problem such as small size valve stem bending easily, the valve piece includes the valve piece of the integral constitution and the recoil disc part, and the lower extreme of bellows is connected with the recoil disc part, the top side of valve piece forms the guide column upwards and extends, and the guide hole of guide bushing slides up and down with the guide column, and the top end of guide column extends to the top hole orifice position of guide hole, and the lower spring seat is equipped with below spring, and the bottom of valve rod is abutted with lower spring seat, and the bottom surface of lower spring seat has the first cone body of the downward convex inverted cone, and the top surface of guide column is equipped with the first taper groove of the first cone body adaptation, and the first cone body is formed positioning into the first taper groove. The overall structural strength and rigidity of valve rod system are strengthened, can bear the high load under the high pressure working condition of small caliber, and the length of guide cooperation is prolonged, and the perpendicularity and stability of valve piece in the movement in the opening and closing process are ensured.

Disclosed is a guide plate for use in a woodworking cutting guide, having a body. The body has a first surface and a second surface opposite to each other along the thickness direction of the body. Multiple through-holes extend through the body. Along the thickness direction, the body is sequentially formed with a guide hole, a mounting hole, and a recess. The guide hole communicates with the mounting hole and extends to the second surface. The mounting hole communicates with the recess, which extends to the first surface. A tapered surface forms the wall of the guide hole, thereby limiting and positioning a guide bushing along the radial direction of the guide hole.

The utility model discloses an integrated rear suspension lower support welding tool which comprises a tool bottom plate and is characterized in that a main clamping mechanism, a left clamping mechanism and a right clamping mechanism are arranged on the tool bottom plate, and the main clamping mechanism is used for positioning and clamping a connecting support on a main arm body; the left clamping mechanism structurally comprises a fixing base, a guide block is arranged on the side face of the fixing base, two guide holes are formed in the guide block, a gasket positioning pin is arranged in one guide hole, a thread bushing positioning pin is arranged in the other guide hole, the other end of the gasket positioning pin and the other end of the thread bushing positioning pin are connected with a sliding block in the fixing base, and the other end of the gasket positioning pin and the other end of the thread bushing positioning pin are connected with the sliding block. The slide block is driven by a cylinder; the left clamping mechanism and the right clamping mechanism are the same in structure. According to the utility model, the welding procedure is reduced to two procedures, so that the production efficiency can be improved and the production cost can be reduced; the automatic welding device can be applied to an automatic welding line, and welding quality consistency is guaranteed.