CN103737524B - Hydraulic spanner - Google Patents

Abstract

The invention discloses a hydraulic wrench, which relates to the technical field of bolt pair removal tools, and includes a wrench body and a handle. The wrench body includes a jaw, a body, a sliding rod piston and a pressure handle. In the oil pressure area, the low oil pressure area of the hydraulic cylinder is equipped with a hydraulic valve. The outlet end of the hydraulic valve is connected to the high oil pressure area. The hydraulic valve is connected to the slide rod piston. The movable jaw sliding in the groove is fixed with the piston, and the body has a pressure relief valve connected with the high oil pressure area. By pressing the pressure handle, the hydraulic valve and the sliding rod piston cooperate to increase the oil pressure in the high oil pressure area, and the driving piston can clamp the nut or bolt cap. After removal, lift the pressure handle to release the pressure and loosen the jaws. For ordinary wrenches Unremovable, heavily corroded bolts can be removed quickly with only moderate torque. The invention has the advantages of simple structure and convenient use, can reduce the labor intensity of operators and improve work efficiency.

Description

hydraulic wrench

technical field

The invention relates to the technical field of bolt pair removal tools.

Background technique

At present, when the known equipment is overhauled, it is often installed in a place with a narrow position and a small fit surplus. Due to the serious corrosion of the nuts, and there is no space for tools such as hammers or wrenches, these nuts cannot be disassembled, which brings great inconvenience to the maintenance work. inconvenient. However, in the equipment overhaul and technical improvement projects of power supply enterprises, it is often necessary to disassemble and connect the lead wires once and disassemble the equipment for maintenance. Because the nuts are severely corroded, lose their edges and corners and become round, ordinary wrenches cannot be snapped into the nuts or can be rotated at an extremely high angle. Small phenomenon, and due to thread corrosion, ordinary wrenches cannot twist the corroded nuts and bolts at all. The traditional method is often to cut off or cut off the screw with a hacksaw or a flat shovel, and then re-drill the hole, tap the buckle, and in severe cases, use gas cutting to cut it. Not only is it time-consuming and labor-intensive, but sometimes it is too difficult to remove due to the severe corrosion of the bolts, which takes time and labor and delays the construction period.

Contents of the invention

The technical problem to be solved by the present invention is to provide a hydraulic wrench with simple structure, convenient and reliable use, which can reduce the labor intensity of operators and improve work efficiency.

In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is:

A hydraulic wrench, comprising a wrench body with a jaw and a handle, the handle is fixed at the tail of the wrench body, the wrench body includes a jaw, a body, a sliding rod piston and a pressure handle, and a hydraulic cylinder is arranged in the body , one end of the press handle is hinged to the body, the slide rod piston runs through the side wall of the body vertically, the exposed end of the slide rod piston is hinged to the middle part of the press handle, the jaw is integrated with the body, and the jaw The front end is arc-shaped, and the jaws include static jaws and moving jaws. There is a groove in the jaws, and the moving jaws that can slide in the grooves are fixedly connected with one end of the piston; the tail of the body An oil injection pipe is provided at the end; the hydraulic cylinder is provided with a low oil pressure area and a high oil pressure area, and a hydraulic valve is provided in the low oil pressure area, and a second check valve is provided in the hydraulic valve. The outlet end of the one-way valve communicates with the high oil pressure area, and the other end communicates with the oil cylinder chamber at the lower end of the slide rod piston; the hydraulic valve is also provided with a first one-way valve, and the inlet of the first one-way valve is connected with the low oil pressure area. The outlet of the first one-way valve communicates with the cylinder chamber at the lower end of the slide rod piston; the outer wall of the body is provided with a pressure relief valve, and the pressure relief valve communicates the low oil pressure area and the high oil pressure area of the hydraulic cylinder. The working surfaces of the static jaws and the moving jaws are provided with arc-shaped wear-resistant blocks, and the inside of the arc-shaped wear-resistant blocks is provided with tooth grooves. The surfaces are all connected by bolts, the free end of the piston is provided with an annular boss, a spring is fixed on the annular boss, a rotating shaft is arranged on the body, the end of the pressing handle is hinged with the rotating shaft, and the A connecting bolt is provided, a through hole is provided in the middle of the connecting bolt, the sliding rod piston is arranged in the through hole of the connecting bolt, and a rubber sealing sleeve is arranged between the sliding rod piston and the through hole of the connecting bolt.

Preferably, sealing rings are provided on the contact end surfaces of the hydraulic cylinder and the body.

Preferably, the handle is hollow, and an end cap is provided at the tail end of the handle, and the end cap is threadedly connected with the handle.

The beneficial effect produced by adopting the above technical solution is: by lifting the slide rod piston, the first one-way valve is opened, and the hydraulic oil enters the valve body of the hydraulic valve; The hydraulic oil is pressed into the high oil pressure area, the hydraulic oil drives the piston, and then drives the moving jaw to clamp the nut or bolt cap, and then opens the pressure relief valve to release the pressure, the driving piston returns under the action of the spring, and the jaw It can be loosened, and the size of the jaw can be changed to adapt to bolts or nuts of different specifications. After quenching, the arc-shaped wear-resistant block has increased hardness and better wear resistance. The arc-shaped wear-resistant block connected by bolts is easier to replace and prolongs the use. Long service life, the arc-shaped wear-resistant block with tooth grooves holds the nut or bolt cap firmly and does not slip. For bolts that cannot be disassembled by ordinary wrenches, severely corroded, or special parts, the nut can be quickly loosened with only an appropriate torque. Quickly and efficiently remove corroded nuts or bolts. The invention has the advantages of simple structure, reasonable design, strong and durable, convenient and reliable use, flexible and convenient, wide application range and long service life, can reduce the labor intensity of operators and improve work efficiency.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the top view of Fig. 1;

Fig. 3 is the structural schematic diagram of Fig. 1;

In the figure: 1-wrench body, 2-handle, 3-jaw, 4-body, 5-slider piston, 6-pressure handle, 7-hydraulic cylinder, 8-piston, 9-oil injection pipe, 10-end cover , 11-hydraulic valve, 12-pressure relief valve, 13-spring, 14-rotating shaft, 15-connecting bolt, 16-sealing ring, 31-static jaw, 32-moving jaw, 33-arc wear block, 34-cog, 35-bolt, 71-low oil pressure zone, 72-high oil pressure zone, 81-boss, 17-first one-way valve, 18-second one-way valve.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

A hydraulic wrench as shown in Figures 1 and 2 includes a wrench body 1 with jaws and a handle 2, the handle 2 is fixed at the tail of the wrench body 1, and the wrench body 1 includes jaws 3, a body 4, The slide rod piston 5 and the pressure handle 6, the body 4 is provided with a hydraulic cylinder 7, one end of the pressure handle 6 is hinged with the body 4, and the slide rod piston 5 vertically penetrates the hydraulic cylinder 7 and the side wall of the body 4, so The exposed end of the slide rod piston 5 is hinged with the middle part of the pressure handle 6, the jaw 3 is integrated with the body 4, the front end of the jaw 3 is arc-shaped, and the jaw 3 includes a static jaw 31 and a dynamic jaw 31. Jaw 32, the jaw 3 is provided with a groove, the movable jaw 32 that can slide in the groove is fixedly connected with one end of the piston 8; the tail end of the body 4 is provided with an oil injection pipe 9, and the oil injection pipe 9 end is provided with oil plug; said hydraulic cylinder is provided with low oil pressure area 71 and high oil pressure area 72, and said low oil pressure area 71 is provided with hydraulic valve 11, and hydraulic valve 11 is provided with second unit One-way valve 18, the outlet end of the second one-way valve 18 communicates with the high oil pressure area 72, and the other end communicates with the oil cylinder chamber at the lower end of the slide rod piston 5; the first one-way valve 17 is also provided in the hydraulic valve 11 , the inlet of the first one-way valve 17 communicates with the low oil pressure area 71, and the outlet of the first one-way valve 17 communicates with the oil cylinder chamber at the lower end of the slide rod piston 5; the outer wall of the body 4 is provided with a relief valve 12, and the The pressure relief valve 12 communicates the high oil pressure area 72 with the low oil pressure area 71 .

As a preferred structure, the other end of the piston 8 is provided with an annular boss 81, a spring 13 is fixed on the annular boss 81 of the piston 8, and the pressure relief valve 12 can be opened to the high oil pressure area 72 after the nut is removed. The high-pressure oil inside is released, and the piston 8 is returned under the action of the spring 13 at the same time to realize the release of the jaw 3; the working surfaces of the static jaw 31 and the moving jaw 32 are equipped with arc-shaped wear-resistant blocks 33, the inner side of the arc-shaped wear-resistant block 33 is provided with a tooth groove 34, and the arc-shaped wear-resistant block 33 is quenched to strengthen the hardness and increase its wear resistance, and the processed tooth groove 34 can more firmly clamp the nut or Bolt cap; the body 4 is provided with a rotating shaft 14, the end of the pressing handle 6 is hinged with the rotating shaft 14, the pressing handle 6 can rotate around the rotating shaft 14, and the sliding rod piston 5 is pressed down by using the principle of leverage to drive the hydraulic valve 11 action.

As a preferred structure, the cylinder block of the hydraulic cylinder 7 and the body 4 are provided with connecting bolts 15, and the middle part of the connecting bolts 15 is provided with a through hole, and the sliding rod piston 5 is arranged in the through holes of the connecting bolts 15, A rubber sealing sleeve is provided between the slide rod piston 5 and the through hole of the connecting bolt 15, which can prevent hydraulic oil leakage and improve sealing performance; the arc-shaped wear-resistant block 33 is connected with the static jaw 31 and The working faces of the moving jaws 32 are connected by bolts 35. If used for a long time, the arc-shaped wear-resistant block 33 will wear seriously, and the removable bolts 35 can be replaced to prolong the service life of the equipment. The size of grinding block 33 is adapted to nuts or bolts of different specifications.

As a preferred structure, the contact end surface of the hydraulic cylinder 7 and the body 4 is provided with a sealing ring 16, which can ensure the good sealing performance of the hydraulic cylinder 7; the handle 2 is hollow, and the tail end of the handle 2 is provided with End cap 10, the end cap 10 is threadedly connected with the handle 2, the oil filling pipe 9 of the hydraulic cylinder 7 is arranged in the handle 2, the end cap 10 is opened when replenishing oil, and the end cap 10 is tightened after operation.

As shown in Figure 3, by lifting the slide rod piston 5, the first one-way valve 17 is opened, and the hydraulic oil enters the cylinder chamber of the valve body of the hydraulic valve 11, and the lever 6 is pressed by using the lever principle, and the second one-way valve 18 is opened, and the The hydraulic oil in the cylinder chamber of the valve body is pressed into the high oil pressure area 72, the hydraulic oil drives the piston 8, and then drives the movable jaw 32 to clamp the nut or bolt cap, and then opens the pressure relief valve 12 to release the pressure, driving the piston 8 Return under the action of the spring 13, the jaw 3 can be loosened, and the bolts or nuts of different specifications can be adapted by replacing the arc-shaped wear-resistant block 33. The arc-shaped wear-resistant block 33 has been quenched to increase its hardness and better wear resistance , the arc-shaped wear-resistant block 33 connected by bolts is more convenient to replace and prolongs the service life. The arc-shaped wear-resistant block with tooth groove 34 holds the nut or bolt cap firmly and does not slip. It cannot be disassembled by ordinary wrenches, and severe corrosion and For bolts in special parts, the nuts can be loosened quickly with only an appropriate torque, and the rusted nuts or bolts can be removed quickly and efficiently.

To sum up, the present invention has the advantages of simple structure, reasonable design, strong and durable, flexible and convenient, wide application range and long service life, which can reduce the labor intensity of operators and improve work efficiency. Utilizing the present invention in the field of equipment overhaul and technical transformation, the working time is shortened by about 30%, especially when the equipment needs to be disassembled during the equipment overhaul process, the implanted bolts are difficult to disassemble due to the loss of corners due to the corrosion of the nuts, but they cannot be dismantled. Destructive demolition, the present invention can effectively solve this kind of difficult problem.

Claims (3)

1. a hydraulic spanner, comprise the wrench body (1) with jaw and handle (2), described handle (2) is fixed on wrench body (1) afterbody, described wrench body (1) comprises jaw (3), body (4), slide bar piston (5) and pressure handle (6), hydraulic cylinder (7) is provided with in described body (4), described pressure handle (6) one end and body (4) hinged, described slide bar piston (5) is vertical through body (4) sidewall, the exposed junction of described slide bar piston (5) and pressure handle (6) middle part hinged, described jaw (3) and body (4) are integral type, described jaw (3) front end is circular arc, described jaw (3) comprises fixed nip (31) and movable clamp port (32), the tail end of described body (4) is provided with oil fuel tube (9), low oil pressure district (71) and high oil pressure district (72) is provided with in described hydraulic cylinder, hydraulic valve (11) is provided with in described low oil pressure district (71), the second check valve (18) is provided with in hydraulic valve (11), described second check valve (18) port of export is communicated with high oil pressure district (72), and the other end is communicated with the cylinder chamber of slide bar piston (5) lower end, also be provided with the first check valve (17) in described hydraulic valve (11), the entrance of the first check valve (17) is communicated with low oil pressure district (71), and the outlet of the first check valve (17) is communicated with the cylinder chamber of slide bar piston (5) lower end, described body (4) outer wall is provided with relief valve (12), and the high oil pressure district (72) of hydraulic cylinder (7) is communicated with low oil pressure district (71) by relief valve (12), the working face of described fixed nip (31) and movable clamp port (32) is equipped with arc wear-resistant block (33), described arc wear-resistant block (33) inner side is provided with teeth groove (34), and described arc wear-resistant block (33) is all connected by bolt (35) with the working face of fixed nip (31) and movable clamp port (32), described body (4) is provided with rotating shaft (14), pressure handle (6) end and rotating shaft (14) hinged, it is characterized in that: described jaw is provided with groove in (3), the movable clamp port (32) that can slide in groove is fixedly connected with piston (8) one end, the free end of described piston (8) is provided with annular boss (81), described annular boss (81) is fixed with spring (13), described body (4) is provided with connecting bolt (15), described connecting bolt (15) middle part is provided with through hole, described slide bar piston (5) is arranged in the through hole of connecting bolt (15), is provided with rubber sealing boot between described slide bar piston (5) and the through hole of connecting bolt (15).

2. hydraulic spanner according to claim 1, is characterized in that: described hydraulic cylinder (7) is equipped with sealing ring (16) with the contact end face of body (4).

3. hydraulic spanner according to claim 1, is characterized in that: described handle (2) is hollow form, and described handle (2) tail end is provided with end cap (10), and described end cap (10) and handle (2) are for being threaded.