CN110883522A - An O-ring replacement system at the guide sleeve of a hydraulic press - Google Patents

Abstract

The invention provides a system for replacing an O-shaped ring at a guide sleeve of a hydraulic machine, which comprises: the base, the sliding seat, the roof, a supporting seat, the supporting shoe, the guide bar, first intercommunication subassembly, second intercommunication subassembly, coupling assembling and jack, install four guide bars on the base, the guide bar top all is connected to the roof, the roof is connected with the hydraulic press collar, all guide bars all pass the sliding seat that is located between bottom plate and the roof, the sliding seat can move in vertical direction under the guide bar direction, install coupling assembling on the sliding seat, coupling assembling is connected with the piston rod of hydraulic press, install first intercommunication subassembly and second intercommunication subassembly on the roof, install the supporting seat on the bottom plate, can dismantle on the supporting seat and be connected with the supporting shoe, the jack is used for placing supporting piston rod on the sliding seat. The O-shaped ring replacing system at the position of the guide sleeve of the hydraulic machine solves the problem that the O-shaped ring is difficult to replace due to tightness between the guide sleeve and the inner wall of the cavity in the prior art.

Description

An O-ring replacement system at the guide sleeve of a hydraulic press

technical field

The invention relates to equipment for overhauling a hydraulic machine, in particular to an O-ring replacement system at a guide sleeve of a hydraulic machine.

Background technique

As shown in Figure 1, the hydraulic press includes: a casing, a piston, a piston rod, a guide sleeve, an O-ring and a pressure plate. A cavity that can communicate with the outside world is opened in the casing, and a piston rod extends into the cavity. Install the piston, and the piston is in close contact with the inner wall of the cavity. The piston divides the cavity into a first oil cavity and a second oil cavity. The piston rod is surrounded by a guide sleeve for closing the cavity. The guide sleeve guides the movement of the piston rod. An O-ring is arranged between the guide sleeve and the inner wall of the cavity, and a pressure plate is installed on the outer casing. The pressure plate blocks the guide sleeve in the cavity. There is a mounting ring, and there are threaded holes on the mounting ring. After long-term use, the O-ring is easy to be damaged. After the damage, the hydraulic pressure will leak oil, so it needs to be replaced. The O-ring between the sleeve and the inner wall of the cavity is pulled out, which is difficult to operate.

SUMMARY OF THE INVENTION

The present invention provides an O-ring replacement system at the guide sleeve of a hydraulic machine, which solves the problem of difficult operation of replacing the O-ring due to the tightness between the guide sleeve and the inner wall of the cavity in the prior art.

To achieve the above object, the present invention has adopted the following technical solutions:

The invention proposes an O-ring replacement system at the guide sleeve of a hydraulic press, comprising: a base, a sliding seat, a top plate, a support seat, a support block, a guide rod, a first communication component, a second communication component, a connection component and a jack, the base Four guide rods are installed on the top of the guide rods, the top of the guide rods are connected to the top plate, the top plate is passed through by the hydraulic press shell, and the top plate is connected with the hydraulic press mounting ring. All the guide rods pass through the sliding seat between the bottom plate and the top plate. The guide rod moves in the vertical direction under the guidance of the sliding seat. The connecting assembly is installed on the sliding seat, and the connecting assembly is connected with the piston rod of the hydraulic machine. The top plate is equipped with a first communication assembly and a second communication assembly. The communication components are respectively used to communicate the first oil inlet and outlet pipes and the second oil inlet and outlet pipes of the hydraulic press. A support seat is installed on the bottom plate, and a support block is detachably connected to the support seat. The support block is used to support the sliding seat, and the sliding seat is used to undertake disassembly. The rear pressure plate and guide sleeve, the jack is used to support the piston rod on the sliding seat.

Compared with the prior art, the present invention has the following beneficial effects:

When dismantling, first, pass the casing of the hydraulic press through the top plate. Since there are many mounting rings protruding from the casing, the casing cannot pass through the top plate. The mounting ring is located above the top plate. Then, connect the mounting ring to the top plate through the third screw, the first oil inlet and outlet pipes and the second oil inlet and outlet pipes are respectively connected to the first oil chamber and the second oil chamber, the first oil chamber is located on the side of the piston away from the guide sleeve, and the first oil chamber is located on the side of the piston away from the guide sleeve. The second oil chamber is located between the piston and the guide sleeve; then, the first oil inlet and outlet pipes and the second oil inlet and outlet pipes are connected using the first communication assembly and the second communication assembly, so that oil can be pumped into the first oil chamber and the second oil can be pumped into the first oil chamber. The oil in the cavity is pumped out, or the oil in the first oil cavity is pumped out and oil is pumped into the second oil cavity; then, the sliding seat is connected to the piston rod through the connecting assembly; and then, the oil in the first oil cavity is started to be pumped out And pump oil into the second oil chamber, so that there is no oil in the first oil chamber, and the piston rod moves to the top to maintain this state; then, according to the model of the hydraulic press, find the appropriate support block, so the support block and support seat are required Removable connection to adapt to the replacement of O-rings on the guide sleeve of various hydraulic presses, so that the base supports the sliding seat through the support seat and the support block. The rear seat can support the piston rod, and can also move the pressure plate and guide sleeve after the connecting assembly is detached from the piston rod; and then separate the connecting assembly from the piston rod, so that the connecting assembly deviates from the piston rod directly below, avoiding the connecting assembly To hinder the installation of the jack and the disassembly of the guide sleeve, the sliding seat falls for a small distance and then falls on the support block; then, place the jack on the sliding seat, and the jack supports the piston rod; then, remove the two parts connecting the pressure plate and the shell. There are at least 6 first screws. Use two first screws to screw them into the installation positions of the two first screws that have just been removed. Screw a nut on each first screw, and then remove the remaining ones. The first screw; then, rotate the nut to lower the position of the pressure plate slowly until the pressure plate is close to the bottom end of the piston rod, until the pressure plate falls; after that, move the pressure plate to the position where it is close to the jack, and use another jack to support it The piston rod and the jack is not surrounded by the pressure plate, and there is always a jack against the piston rod. Because there is oil and pressure in the second oil chamber at this time, if the force to keep the piston rod pressed above is suddenly lost, the guide sleeve will lose the pressure of the pressure plate. It is very likely that the piston rod, the oil in the second oil chamber and the guide sleeve will move down together, so the piston rod needs to be supported all the time; then, remove the jack in the pressure plate to realize the disassembly of the pressure plate; Supply oil in the second oil chamber to realize the hydraulic pressure to rush the guide sleeve out of the casing, and then slowly move the guide sleeve to the bottom end of the piston rod; after that, remove the O-ring on the guide sleeve and put on a new one. The O-ring is used to replace the O-ring; then, the guide sleeve is slowly raised, and the guide sleeve is pressed into the housing; after that, the pressure plate is placed outside the piston rod, and the pressure plate is slowly raised and sleeved outside the casing; and then screw the first screw into the pressure plate and the casing to realize the installation of the pressure plate, and the pressure plate blocks the guide sleeve in the casing.

Other advantages, objects, and features of the present invention will appear in part from the description that follows, and in part will be appreciated by those skilled in the art from the study and practice of the invention.

Description of drawings

Fig. 1 is a sectional view of a hydraulic press;

Figure 2 is a sectional view of the O-ring replacement system at the guide sleeve of the hydraulic press;

Figure 3 is a top view at the sliding seat;

Fig. 4 is the schematic diagram after the buffer ring and the connecting ring in Fig. 3 are disassembled;

5 is an enlarged view of the first communication assembly;

FIG. 6 is an enlarged view of the second communication component.

Reference numerals: housing 10, piston 11, piston rod 12, guide sleeve 13, O-ring 14, pressure plate 15, base 21, sliding seat 22, top plate 23, support seat 24, support block 25, guide rod 26, rotating arm 27. Rotating ring 270, first elastic member 28, hinge shaft 29, suspension bracket 20, buffer ring 30, first communication component 3, communication head 31, hose 32, sealing ring 33, first spring 34, second Connecting assembly 4, connecting assembly 5, connecting ring 51, support rod 52, second screw 53, support assembly 6, driving arm 61, arc block 62, first extrusion assembly 7, second extrusion assembly 8, frustum of cone 81 , the second screw 82 , the elastic blocking component 9 , the wedge block 91 , the moving rod 92 , the second spring 93 , the roller 94 , and the mounting seat 100 .

Detailed ways

In order to make the technical means realized by the present invention, the creation features, the achievement of the purpose and the effect clearer and easier to understand, the present invention will be further elaborated below in conjunction with the accompanying drawings and specific embodiments:

As shown in Figures 1 to 6, the present invention proposes an O-ring replacement system at the guide sleeve of a hydraulic press, including: a base 21, a sliding seat 22, a top plate 23, a support seat 24, a support block 25, a guide rod 26, a first A communicating component 3, a second communicating component 4, a connecting component 5 and a jack (not shown in the figure), four guide rods 26 are installed on the base 21, the tops of the guide rods 26 are all connected to the top plate 23, and the top plate 23 supplies the hydraulic press housing 10 Passing through, the top plate 23 is connected with the hydraulic press mounting ring, all the guide rods 26 pass through the sliding seat 22 located between the bottom plate and the top plate 23, the sliding seat 22 can move in the vertical direction under the guidance of the guiding rod 26, and the sliding seat 22 A connecting assembly 5 is installed on it, and the connecting assembly 5 is connected with the piston rod 12 of the hydraulic press. A first communication assembly 3 and a second communication assembly 4 are installed on the top plate 23. The first communication assembly 3 and the second communication assembly 4 are used for Connecting the first oil inlet and outlet pipes and the second oil inlet and outlet pipes of the hydraulic press, a support seat 24 is installed on the bottom plate, and a support block 25 is detachably connected to the support seat 24. The support block 25 is used to support the sliding seat 22, and the sliding seat 22 is used for receiving The disassembled pressing plate 15 and the guide sleeve 13 are used for placing the jack on the sliding seat 22 to support the piston rod 12 .

In order to realize the detachable connection between the support block 25 and the support seat 24, and realize the relative position positioning of the support block 25 and the support seat 24, so as to avoid that the support block 25 does not support the place where the jack needs to be installed on the sliding seat 22 after the support block 25 is installed, the support seat 24 The top surface is recessed to form two T-shaped installation grooves, sliding feet are slidably installed in each installation groove, and a support block 25 is fixed to each sliding foot.

In order to realize that the buffer ring 30 can automatically rotate to the right below the piston rod 12 after the connection assembly 5 is separated from the piston rod 12 to support the dropped pressure plate 15 and the guide sleeve 13, the hollow arrangement of the buffer ring 30 also provides a good installation for the jack. The installation position ensures that the jack can be fully supported by the sliding seat 22, a rotatable rotating ring 270 is installed on the sliding seat 22, the rotating ring 270 passes through and is fixed with the rotating arm 27, and one end of the rotating arm 27 is installed with a connecting component 5. A buffer ring 30 is installed at the other end of the rotating arm 27. The buffer ring 30 is used to receive the disassembled pressure plate 15 and the guide sleeve 13. A first elastic member 28 is installed at the hinge between the rotating ring 270 and the sliding seat 22. The first elastic The buffer ring 30 can be kept directly below the piston rod 12 by the elastic force of the member 28 .

The first elastic member 28 is a coil spring. The inner wall of the rotating ring 270 is recessed to form a mounting groove. The coil spring is convoluted in the mounting groove. The hinge shaft 29, the outer end of the coil spring is fixed to the inner wall of the installation groove.

In order to design the connecting assembly 5 with a simple structure, the connecting assembly 5 includes: a connecting ring 51 , two support rods 52 and a plurality of second screws 53 , the connecting ring 51 is connected with the piston rod 12 through the second screws 53 , and the connecting ring 51 is connected with two supports The rod 52 and the sliding seat 22 are provided with a chute for the two support rods 52 to slide. The support rod 52 cannot be disengaged from the sliding seat 22, the support rod 52 can only slide on the sliding seat 22, and the rotating ring 270 cannot be disengaged from the hinge shaft 29 from the vertical direction, and the rotating ring 270 can only rotate relative to the hinge shaft 29, so that When the piston rod 12 rises, the piston rod 12 can drive the sliding seat 22 to rise through the connecting ring 51, the support rod 52 and the rotating ring 270. The setting of the support rod 52 avoids the overstressing of the connection between the rotating ring 270 and the rotating arm 27. Large and easy to break, increasing the service life.

In order to avoid the easy damage of the jack and the buffer ring 30 because the chute supporting the jack and the buffer ring 30 is not filled when the jack and the buffer ring 30 are used, and to improve the service life of the jack and the buffer ring 30, a support is connected to the rotating ring 270 Assembly 6, the support assembly 6 is opposite to the buffer ring 30, and the support assembly 6 is used to fill the chute when the buffer ring 30 is opposite to the piston rod 12.

In order to design the support assembly 6 with a simple structure and prevent the support assembly 6 from affecting the rotation of the buffer ring 30 and the support rod 52, the support assembly 6 includes: a driving arm 61 and two arc-shaped blocks 62, and the two arc-shaped blocks 62 are respectively disposed in the two chutes. Inside, the surface of each arc-shaped block 62 and the surface of the sliding seat 22 are on the same plane, the driving arm 61 is connected with the two arc-shaped blocks 62 , the two arc-shaped blocks 62 support the buffer ring 30 , and the driving arm 61 is fixed with the rotating ring 270 . . Since the buffer ring 30 , the driving arm 61 and the two arc-shaped blocks 62 are fixed relative to the rotating ring 270 , the two arc-shaped blocks 62 always support the buffer ring 30 , and the top surface of the arc-shaped block 62 is connected to the sliding seat 22 The surface is on a plane, ensuring that there is no step in the contact between the arc block 62 and the sliding seat 22 .

In order to improve the maintenance efficiency, two hydraulic presses are installed on the top plate 23 at the same time, and the two hydraulic presses are installed on the top plate 23 in a mirror-symmetrical manner.

In order to connect the first oil inlet and outlet pipes of the two hydraulic machines at the same time and improve the installation efficiency, a first extrusion assembly 7 is installed between the two first oil inlet and outlet pipes. A pressing assembly 7 is used to press the two first communication assemblies 3 on the two first oil inlet and outlet pipes respectively. A second elastic member is arranged in the first communication assembly 3, and the second elastic member can keep the first communication assembly 3 away from The corresponding first inlet and outlet pipes.

In order to connect the second oil inlet and outlet pipes of the two hydraulic presses at the same time and further improve the installation efficiency, a second extrusion assembly 8 is installed between the two second oil inlet and outlet pipes. The two extrusion assemblies 8 are used to press the two second communication assemblies 4 on the two second oil inlet and outlet pipes respectively. A third elastic member is arranged in the second communication assembly 4, and the third elastic member can keep the second communication assembly 4 away from the The corresponding second inlet and outlet pipes.

In order to avoid being hindered by excessive oil when the guide sleeve 13 is pressed into the housing 10 and to reduce the difficulty of pressing the guide sleeve 13 into the housing 10 , each second communication component 4 is connected with a mounting seat 100 , each mounting seat 100 is installed with an elastic blocking component 9, the elastic blocking component 9 does not prevent the pressure plate 15 and the guide sleeve 13 from being separated from the housing 10, and the elastic blocking component 9 is used when the second communication component 4 communicates the second oil inlet and outlet pipes The guide sleeve 13 and the pressing plate 15 are restricted from approaching the housing 10 . The elastic blocking assembly 9 realizes that the guide sleeve 13 can be brought close to the casing 10 only after the second oil inlet and outlet pipes are opened, avoiding the misoperation of making the guide sleeve 13 close to the casing 10 without disconnecting the second oil inlet and outlet pipes. The design suggests disconnecting the second inlet and outlet pipes.

Each of the first communication component 3 and the second communication component 4 includes: a communication head 31, a hose 3211, a sealing ring 33 and a first spring 34, the first spring 34 is a second elastic member, and one end of the communication head 31 is used for pressing. Tightly on the first oil inlet and outlet pipe or the second oil inlet and outlet pipe, the inner wall of the communication head 31 is provided with a step for pressing the end face of the first oil inlet and outlet pipe or the second oil inlet and outlet pipe, and a sealing ring 33 is installed on the step. The end faces of the oil inlet and outlet pipes or the second oil inlet and outlet pipes are in close contact, the communication head 31 is L-shaped, the communication head 31 can slide relative to the top plate 23 , the other end of the communication head 31 is connected to one end of the hose 3211 , and the hose 3211 allows the communication head 31 to slide relative to the top plate 23 . , the other end of the hose 3211 is connected to the oil pump, one end of the first spring 34 is fixed relative to the communication head 31, the other end of the first spring 34 is fixed relative to the top plate 23, the first spring 34 is used to keep the communication head 31 away from the first inlet and outlet pipes or the second In and out tubing.

The second communication assembly 4 is mounted on the suspension frame 20 , and the suspension frame 20 is fixed on the top plate 23 .

Both the first extrusion assembly 7 and the second extrusion assembly 8 include: a frustum 81 and a second screw 82, the frustum 81 is used to extrude the communication heads 31 of the two first communication assemblies 3 or the two second communication assemblies 4, The big end of the truncated cone 81 is connected with the second screw 82 , and the second screw 82 is screwed with the top plate 23 or the hanger 20 where it is located.

The screw of the second extrusion assembly 8 is located in the horizontal direction, the mounting seat 100 is fixed with the communication head 31 of the second communication assembly 4 , and the mounting seat 100 can move in a direction parallel to the radial direction of the piston rod 12 driven by the communication head 31 .

The elastic blocking component 9 includes: a wedge 91 , a moving rod 92 , a second spring 93 and at least three rollers 94 . The moving rod 92 passes through the mounting seat 100 , and the moving direction of the moving rod 92 relative to the mounting seat 100 is suspended relative to the communication head 31 The moving direction of the frame 20 is parallel, one end of the moving rod 92 is fixed to the big end of the wedge 91, the wedge 91 is provided with an inclined surface facing the housing 10, at least three rollers 94 are installed on the wedge 91, and the rollers 94 emerge from the inclined surface, The roller 94 can be rotated, the roller 94 is used to contact the pressing plate 15 and the guide sleeve 13, the second spring 93 is a third elastic member, one end of the second spring 93 is fixed relative to the mounting seat 100, and the other end of the second spring 93 is fixed relative to the wedge 91 .

When the guide sleeve 13 or the pressure plate 15 is moved away from the housing 10, the guide sleeve 13 or the pressure plate 15 contacts the roller 94 on the inclined surface, and the guide sleeve 13 or the pressure plate 15 uses the roller 94 to squeeze the wedge 91 to move away from the mounting seat 100. With the inclination of the inclined surface, the wedge block 91 can be slowly squeezed toward the mounting seat 100 , thereby allowing the guide sleeve 13 or the pressing plate 15 to pass over the wedge block 91 . When the guide sleeve 13 is pressed into the housing 10, the guide sleeve 13 is in contact with the non-inclined surface of the wedge block 91, so that the wedge block 91 cannot be slowly approached to the mounting seat 100, and the wedge block 91 does not allow the guide sleeve 13 to pass over. Only by rotating the second screw 82 of the second extrusion assembly 8, the connecting head 31 can drive the mounting seat 100 and the wedge 91 away from the centerline of the piston rod 12 under the elastic force of the first spring 34, so that the wedge 91 deviates from the guide sleeve 13 and the wedge 91. The lifting and moving space of the pressing plate 15 ensures that the guide sleeve 13 can be installed back only after the second oil inlet and outlet pipes are opened, reducing the difficulty of pressing the guide sleeve 13 into the housing 10 .

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be Modifications or equivalent substitutions without departing from the spirit and scope of the technical solutions of the present invention should be included in the scope of the claims of the present invention.

Claims (10)

1. An O-ring replacement system at the guide sleeve of a hydraulic press, characterized in that it comprises: a base, a sliding seat, a top plate, a support seat, a support block, a guide rod, a first communication assembly, a second communication assembly, a connecting assembly and a jack , four guide rods are installed on the base, the top of the guide rods are connected to the top plate, the top plate is passed through by the hydraulic press shell, the top plate is connected with the hydraulic press mounting ring, and all the guide rods pass through the sliding seat between the bottom plate and the top plate, the sliding seat It can move in the vertical direction under the guidance of the guide rod, a connecting assembly is installed on the sliding seat, the connecting assembly is connected with the piston rod of the hydraulic machine, and the first communication assembly and the second communication assembly are installed on the top plate, and the first communication assembly and The second communication components are respectively used to connect the first oil inlet and outlet pipes and the second oil inlet and outlet pipes of the hydraulic press. A support seat is installed on the bottom plate, and a support block is detachably connected to the support seat. The support block is used to support the sliding seat, and the sliding seat is used for Undertake the disassembled pressure plate and guide sleeve, and the jack is used to place on the sliding seat to support the piston rod. 2. The O-ring replacement system at the guide sleeve of a hydraulic press according to claim 1, wherein the top surface of the support seat is recessed to form two T-shaped installation grooves, and each installation groove is slidably installed with sliding feet, Each sliding foot is fixed with a support block. 3. The O-ring replacement system at the guide sleeve of a hydraulic press according to claim 2, wherein a rotatable rotating ring is installed on the sliding seat, the rotating ring passes through and is fixed with a rotating arm, and one end of the rotating arm is Install the connecting assembly, and install the buffer ring at the other end of the rotating arm. The buffer ring is used to receive the disassembled pressure plate and the guide sleeve. A first elastic member is installed at the hinge between the rotating ring and the sliding seat. The elastic force of the first elastic member can maintain the buffer. The ring is located just below the piston rod. 4. The O-ring replacement system at the guide sleeve of a hydraulic press according to claim 3, wherein the connecting assembly comprises: a connecting ring, two support rods and a plurality of second screws, and the connecting ring is connected to the piston rod through the second screws The connecting ring is connected with two support rods, the sliding seat is provided with a chute for the two support rods to slide, and the chute is arranged with the center line of the rotating ring as the center of the circle. 5 . The O-ring replacement system at the guide sleeve of a hydraulic press according to claim 4 , wherein a support assembly is connected to the rotating ring, the support assembly is opposite to the buffer ring, and the support assembly is used when the buffer ring is connected to the piston. 6 . Fill the chute when the rod is facing up. 6 . The O-ring replacement system at the guide sleeve of a hydraulic press according to claim 5 , wherein the support assembly comprises: a driving arm and two arc-shaped blocks, the two arc-shaped blocks are respectively arranged in the two chutes, and each 6. 6 . The surface of an arc-shaped block and the surface of the sliding seat are on the same plane, the driving arm is connected with the two arc-shaped blocks, the two arc-shaped blocks support the buffer ring, and the driving arm is fixed with the rotating ring. 7. The O-ring replacement system at the guide sleeve of a hydraulic press according to claim 1, wherein the two hydraulic presses are mounted on the top plate in mirror images, and the first oil inlet and outlet pipes and the second oil inlet and outlet pipes are located between the two hydraulic press shells. between. 8 . The O-ring replacement system at the guide sleeve of a hydraulic press according to claim 7 , wherein a first extrusion assembly is installed between the two first oil inlet and outlet pipes, and the first extrusion assembly is connected to the two first oil inlet and outlet pipes. 9 . The communication component functions. The first extrusion component is used to press the two first communication components on the two first oil inlet and outlet pipes respectively. A second elastic member is arranged in the first communication component, and the second elastic member can hold the first communication component. Keep away from the corresponding first inlet and outlet pipes. 9 . The O-ring replacement system at the guide sleeve of a hydraulic press according to claim 7 , wherein a second extrusion assembly is installed between the two second oil inlet and outlet pipes, and the second extrusion assembly is connected to the two second oil inlet and outlet pipes. 10 . The second extrusion assembly is used to press the two second communication assemblies on the two second oil inlet and outlet pipes respectively. A third elastic member is arranged in the second communication assembly, and the third elastic member can hold the second communication assembly. Keep away from the corresponding second oil inlet and outlet pipes. 10. The O-ring replacement system at the guide sleeve of a hydraulic press according to claim 9, wherein each second communication component is connected with a mounting seat, and each mounting seat is installed with an elastic blocking component, and the elastic blocking The assembly does not prevent the pressing plate and the guide sleeve from disengaging from the housing, and the elastic blocking assembly is used to restrict the guide sleeve and the pressing plate from approaching the housing when the second communication member communicates the second oil inlet and outlet pipes.

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