Hydraulic press and hydraulic system of hydraulic press

Abstract

The utility model relates to a hydraulic press and a hydraulic system of the hydraulic press, and belongs to the field of pipe fitting machining equipment. The device comprises a movable wall, a fixed wall, a carrier roller and a base, the movable wall and the fixed wall are fixed to the two ends of the base respectively, the carrier roller is located between the movable wall and the fixed wall, the device is structurally characterized by further comprising a pushing device, a socket sealing plate and a spigot sealing plate, the pushing device is installed on the movable wall, and the socket sealing plate is installed on the fixed wall. The socket sealing plate is mounted on the pushing device, the spigot sealing plate is mounted on the fixed wall, and the socket sealing plate is matched with the spigot sealing plate; the pushing device comprises a pushing trolley, wheels, a guide rail, a main oil cylinder and an auxiliary oil cylinder, cylinder barrels of the main oil cylinder and the auxiliary oil cylinder are installed on the movable wall, piston rods of the main oil cylinder and the auxiliary oil cylinder are connected with the pushing trolley, the wheels are installed at the bottom of the pushing trolley, the guide rail is installed on the base, and the wheels are matched with the guide rail.

Description

TECHNICAL FIELD

[0001] The utility model relates to a water pressure machine and water pressure machine hydraulic system belong to pipe fitting processing equipment field. BACKGROUND

[0002] The water pressure machine is a kind of machine using oil balance control to carry out hydrostatic experiment to steel pipe, pipe fitting needs to be carried out hydrostatic experiment by water pressure machine after processing, and in view of this, a kind of automatic mixed pipe passes through line water pressure machine is disclosed in the patent literature with application No.202121327789.3, although the water pressure machine in the above prior art can carry out hydrostatic experiment to different pipe diameter pipe fittings, but the span of pipe diameter is small. UTILITY MODEL CONTENTS

[0003] The utility model aims at overcoming the above-mentioned insufficient in the prior art, and provides a water pressure machine and water pressure machine hydraulic system with reasonable structure design.

[0004] The utility model discloses a water pressure machine that adopts the technical scheme to solve the above problem, the water pressure machine includes mobile wall, fixed wall, carrier roller and base, the mobile wall and fixed wall are fixed at the both ends of base respectively, the carrier roller is located between mobile wall and fixed wall, and its structural characteristics are as follows: further include pusher, socket sealing plate and spigot sealing plate, the pusher is installed on mobile wall, the socket sealing plate is installed on pusher, the spigot sealing plate is installed on fixed wall, and the socket sealing plate cooperates with spigot sealing plate;The pusher includes pusher trolley, wheel, guide rail, main oil cylinder and auxiliary oil cylinder, the cylinder barrel of main oil cylinder and auxiliary oil cylinder is installed on mobile wall, the piston rod of main oil cylinder and auxiliary oil cylinder is connected with pusher trolley, the wheel is installed at the bottom of pusher trolley, the guide rail is installed on base, and the wheel cooperates with guide rail.

[0005] Further, it further includes pull rod, and the both ends of pull rod are connected with mobile wall and fixed wall respectively.

[0006] Further, it further includes pipe clamping device for clamping small pipe diameter pipe fitting when carrying out hydrostatic experiment on small pipe diameter pipe fitting to prevent small pipe diameter pipe fitting from bending, and the pipe clamping device is located between two carrier rollers.

[0007] Further, the spigot sealing plate is large pipe diameter spigot sealing plate or small pipe diameter spigot sealing plate.

[0008] Further, the number of auxiliary oil cylinders is two, and the main oil cylinder is located between two auxiliary oil cylinders.

[0009] Further, the both sides of spigot sealing plate are respectively provided with sealing ring and connecting flange, and the connecting flange is connected with fixed wall.

[0010] Further, the water injection port is arranged on the socket sealing plate.

[0011] Further, another technical purpose of the hydraulic system of the water pressure machine is to provide a hydraulic system of a water pressure machine.

[0012] The above technical purpose of the utility model is realized through the following technical scheme.

[0013] A hydraulic system of a water pressure machine, characterized in that: comprising an electro-hydraulic reversing valve, a first electromagnetic reversing valve, a second electromagnetic reversing valve, a small proportional pressure reducing valve, a large proportional pressure reducing valve, a double one-way throttling valve, a first high-pressure filter, a second high-pressure filter, a first electromagnet and a second electromagnet, the electro-hydraulic reversing valve is internally provided with a fourth electromagnet and a fifth electromagnet, the first electromagnetic reversing valve is internally provided with a third electromagnet, the second electromagnetic reversing valve is internally provided with a sixth electromagnet, the auxiliary oil cylinder is connected with the small proportional pressure reducing valve, the small proportional pressure reducing valve is connected with the electro-hydraulic reversing valve, the electro-hydraulic reversing valve is connected with the first high-pressure filter, the main oil cylinder is connected with the first electromagnetic reversing valve, the main oil cylinder is connected with the second electromagnet, the second electromagnet is connected with the first electromagnet, the first electromagnet is connected with the large proportional pressure reducing valve, the large proportional pressure reducing valve is connected with the second high-pressure filter, and the second electromagnetic reversing valve is connected with the double one-way throttling valve.

[0014] Further, the main oil cylinder and the auxiliary oil cylinder are connected with the auxiliary oil tank.

[0015] Compared with the prior art, the water pressure machine can realize water pressure experiments on small-diameter pipe fittings (DN80) and large-diameter pipe fittings (DN900) by replacing the socket sealing plate, has a large pipe diameter span, and can meet the water pressure experiments on pipe fittings of different diameters. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a front view structural schematic diagram of the water pressure machine of the utility model embodiment.

[0017] Figure 2 is a top view structural schematic diagram of the water pressure machine of the utility model embodiment.

[0018] Figure 3 is Figure 1 A-A sectional view structural schematic diagram in the

[0019] Figure 4 is a structural schematic diagram of the small-diameter socket sealing plate of the utility model embodiment.

[0020] Figure 5It is the structural schematic view of the large pipe diameter socket sealing plate of the embodiment of the utility model.

[0021] Figure 6 It is the principle schematic view of the hydraulic system of the water pressure machine of the embodiment of the utility model.

[0022] In the drawing: moving wall 1, fixed wall 2, pushing device 3, carrier roller 4, pull rod 5, base 6, pipe clamping device 7, socket sealing plate 8, socket sealing plate 9,

[0023] Pushing trolley 31, wheel 32, guide rail 33, main oil cylinder 34, auxiliary oil cylinder 35,

[0024] Sealing ring 91, connecting flange 92, water injection port 93,

[0025] No. 1 electromagnet DT601, no. 2 electromagnet DT602, no. 3 electromagnet DT603, no. 4 electromagnet DT604, no. 5 electromagnet DT605, no. 6 electromagnet DT606,

[0026] Electro-hydraulic reversing valve 01, no. 1 electromagnetic reversing valve 021, no. 2 electromagnetic reversing valve 022, small proportional pressure reducing valve 031, large proportional pressure reducing valve 032, double one-way throttling valve 04, no. 1 high-pressure filter 051, no. 2 high-pressure filter 052, exhaust valve 06, liquid filling valve 07, no. 1 electronic pressure relay 081, no. 2 electronic pressure relay 082, no. 1 pressure gauge 091, no. 2 pressure gauge 092, no. 3 pressure gauge 093. DETAILED DESCRIPTION

[0027] The utility model will be further explained in detail in combination with the drawings and through the embodiment, and the following embodiment is the explanation of the utility model, and the utility model is not limited to the following embodiment.

[0028] EMBODIMENT

[0029] Referring to Figures 1 to 6 It is shown that the structure, ratio, size and the like shown in the drawings attached to the specification are only used to cooperate with the content disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the limited conditions that the utility model can be implemented, so it does not have the substantial meaning of technology, any modification of structure, change of proportional relationship or adjustment of size, without affecting the effect and purpose that the utility model can produce, should still fall within the range covered by the technical content disclosed by the utility model. At the same time, if the words such as "upper", "lower", "left", "right", "intermediate" and "one" are used in the specification, they are only for the convenience of clear description, and are not used to limit the range that the utility model can be implemented, the change or adjustment of relative relationship, without substantially changing the technical content, is also regarded as the scope that the utility model can be implemented.

[0030] The hydraulic press in the embodiment comprises a moving wall 1, a fixed wall 2, a pushing device 3, a supporting roller 4, a pull rod 5, a base 6, a socket sealing plate 8 and a spigot sealing plate 9. The moving wall 1 and the fixed wall 2 are respectively fixed at two ends of the base 6. The supporting roller 4 is located between the moving wall 1 and the fixed wall 2. The pushing device 3 is installed on the moving wall 1. The socket sealing plate 8 is installed on the pushing device 3. The spigot sealing plate 9 is installed on the fixed wall 2. The socket sealing plate 8 cooperates with the spigot sealing plate 9. The two ends of the pull rod 5 are respectively connected with the moving wall 1 and the fixed wall 2.

[0031] The pushing device 3 comprises a pushing trolley 31, a wheel 32, a guide rail 33, a main oil cylinder 34 and an auxiliary oil cylinder 35. The cylinder barrels of the main oil cylinder 34 and the auxiliary oil cylinder 35 are both installed on the moving wall 1. The piston rods of the main oil cylinder 34 and the auxiliary oil cylinder 35 are connected with the pushing trolley 31. The wheel 32 is installed at the bottom of the pushing trolley 31. The guide rail 33 is installed on the base 6. The wheel 32 cooperates with the guide rail 33. The number of the auxiliary oil cylinder 35 is two. The main oil cylinder 34 is located between the two auxiliary oil cylinders 35.

[0032] When the water pressure experiment is performed on the small-diameter pipe fitting, the hydraulic press further comprises a pipe clamping device 7, which is located between the two supporting rollers 4 and is used to clamp the small-diameter pipe fitting to prevent the small-diameter pipe fitting from being bent when the water pressure experiment is performed on the small-diameter pipe fitting. The small-diameter pipe fitting refers to the pipe fitting with a diameter less than DN100.

[0033] The spigot sealing plate 9 is a large-diameter spigot sealing plate or a small-diameter spigot sealing plate. The two sides of the spigot sealing plate 9 are respectively provided with a sealing ring 91 and a connecting flange 92. The connecting flange 92 is connected with the fixed wall 2. A water inlet 93 is installed on the spigot sealing plate 9. The water inlet 93 of the large-diameter spigot sealing plate is larger than that of the small-diameter spigot sealing plate.

[0034] Specifically, when the hydraulic press works, the pipe fitting is placed on the supporting roller 4. The socket sealing plate 8 is pushed by the pushing device 3, so that the socket end and the spigot end of the pipe fitting are respectively in contact with the socket sealing plate 8 and the spigot sealing plate 9, and the pipe fitting is sealed. The water pressure experiment is performed by injecting water into the spigot end of the pipe fitting. When the water pressure experiment is performed on the large-diameter pipe fitting and the small-diameter pipe fitting respectively, the corresponding spigot sealing plate 9 can be replaced in advance.

[0035] The hydraulic press can perform the water pressure experiment on the large-diameter pipe fitting and the small-diameter pipe fitting respectively. When the water pressure experiment is performed on the large-diameter pipe fitting, the large-diameter spigot sealing plate needs to be replaced, and at the same time, the supporting roller 4 is in a low position to cooperate with the large-diameter pipe fitting for the water pressure experiment. When the water pressure experiment is performed on the small-diameter pipe fitting, the small-diameter spigot sealing plate needs to be replaced, and at the same time, the supporting roller 4 is in a high position to cooperate with the small-diameter pipe fitting for the water pressure experiment.

[0036] The hydraulic system of the hydraulic press comprises an electro-hydraulic reversing valve 01, a first electromagnetic reversing valve 021, a second electromagnetic reversing valve 022, a small proportional pressure reducing valve 031, a large proportional pressure reducing valve 032, a double one-way throttling valve 04, a first high-pressure filter 051, a second high-pressure filter 052, a first electromagnet DT601 and a second electromagnet DT602, the electro-hydraulic reversing valve 01 is provided with a fourth electromagnet DT604 and a fifth electromagnet DT605, the first electromagnetic reversing valve 021 is provided with a third electromagnet DT603, and the second electromagnetic reversing valve 022 is provided with a sixth electromagnet DT606.

[0037] The auxiliary oil cylinder 35 is connected with the small proportional pressure reducing valve 031, the small proportional pressure reducing valve 031 is connected with the electro-hydraulic reversing valve 01, the electro-hydraulic reversing valve 01 is connected with the first high-pressure filter 051, the main oil cylinder 34 is connected with the first electromagnetic reversing valve 021, the main oil cylinder 34 is connected with the second electromagnet DT602, the second electromagnet DT602 is connected with the first electromagnet DT601, the first electromagnet DT601 is connected with the large proportional pressure reducing valve 032, the large proportional pressure reducing valve 032 is connected with the second high-pressure filter 052, the second electromagnetic reversing valve 022 is connected with the double one-way throttling valve 04, the double one-way throttling valve 04 is connected with the exhaust valve 06, the main oil cylinder 34 and the auxiliary oil cylinder 35 are both connected with an auxiliary oil tank, the main oil cylinder 34 is connected with the auxiliary oil tank through a liquid filling valve 07, and the liquid filling valve 07 is connected with the first electromagnetic reversing valve 021.

[0038] The first electronic pressure relay 081 is connected in parallel with the first pressure gauge 091, and the first electronic pressure relay 081 and the first pressure gauge 091 are both connected with a pipeline between the auxiliary oil cylinder 35 and the small proportional pressure reducing valve 031, the second electronic pressure relay 082 is connected in parallel with the second pressure gauge 092, and the second electronic pressure relay 082 and the second pressure gauge 092 are both connected with a pipeline between the main oil cylinder 34 and the second electromagnet DT602, and the third pressure gauge 093 is connected with a pipeline between the second electromagnet DT602 and the first electromagnet DT601.

[0039] The pressure test of the hydraulic press is as follows:

[0040] I. Experimental water pressure: 50 bar, pressure holding time: 10-15 seconds

[0041] 1. The auxiliary oil cylinder 35 is used for pressure boosting in the experiment of pipe fittings with a diameter of DN150 or less, and the main oil cylinder 34 is used for pressure boosting in the experiment of pipe fittings with a diameter of more than DN150.

[0042] 2. (DN80-150) The main hydraulic cylinder 34 moves forward and backward through the auxiliary hydraulic cylinder 35. When the auxiliary hydraulic cylinder 35 moves forward: the fourth electromagnet DT604 is energized, and the small proportional pressure reducing valve 031 is energized at the same time (pressure setting value is 3-5MP). After the auxiliary hydraulic cylinder 35 moves forward and the pressure sensor has a signal of about 0.5MP, the pressure of the small proportional pressure reducing valve 031 is set to about 0.8MP (based on the condition that there is no leakage when filling with water at low pressure). The high pressure filling oil pressure is automatically adjusted according to the water pressure ratio (at the same time, the third electromagnet DT603 is energized, and the main hydraulic cylinder 34 is in a floating state).

[0043] 3. Auxiliary cylinder 35 retracts: Electromagnet No. 5 DT605 is energized, and at the same time, electromagnet No. 3 DT603 is energized (main cylinder 34 is in a floating state).

[0044] 4. (DN200-900) The main hydraulic cylinder 34 moves forward and backward via the auxiliary hydraulic cylinder 35. When the auxiliary hydraulic cylinder 35 moves forward: Electromagnet DT604 (number four) is energized, and simultaneously, the small proportional pressure reducing valve 031 is energized (pressure set at 3-5 MPa). After the pressure sensor of the auxiliary hydraulic cylinder 35 receives a signal of approximately 1-5 MPa, the pressure of the small proportional pressure reducing valve 031 is adjusted to approximately 1-4 MPa (based on the condition that there is no leakage during low-pressure water filling). The oil pressure of the main hydraulic cylinder 34 during high-pressure water filling is automatically adjusted according to the water pressure ratio. Electromagnet DT601 (number one) is energized (when the pressure sensor of the main hydraulic cylinder 34 receives a signal of approximately 1 MPa, the oil pressure of the proportional valve of the auxiliary hydraulic cylinder 35 is adjusted to 0). When the main hydraulic cylinder 34 moves backward: Electromagnet DT605 (number five) is energized, and simultaneously, electromagnet DT603 (number three) is energized (the main hydraulic cylinder 34 is in a floating state). At the same time, electromagnets DT601 (number one) and DT602 (number two) are energized, and the proportional valve of the main hydraulic cylinder 34 is adjusted to 0.

[0045] 2. After filling with low-pressure water, maintain for 2 hours; after filling with high-pressure water at 16 bar, maintain for 2 hours; release the high pressure and maintain with low-pressure water for 2 hours; then fill with high pressure at 16 bar and maintain for 2 hours. Repeat this cycle 25 times to complete the pressure test of one pipe fitting.

[0046] 1. For pipe fittings with a diameter of DN300 (inclusive) or less, the auxiliary hydraulic cylinder 35 is used for pressurization during the test; for pipe fittings with a diameter of DN300 or more, the main hydraulic cylinder 34 is used for pressurization during the test.

[0047] 2. (DN80-300) The main hydraulic cylinder 34 moves forward and backward through the auxiliary hydraulic cylinder 35. When the auxiliary hydraulic cylinder 35 moves forward: the fourth electromagnet DT604 is energized, and the small proportional pressure reducing valve 031 is energized at the same time (pressure setting value is 3-5MP). After the auxiliary hydraulic cylinder 35 moves forward and the pressure sensor has a signal of about 0.5MP, the pressure of the small proportional pressure reducing valve 031 is set to about 0.8MP (based on the condition that there is no leakage when filling with water at low pressure). The high pressure filling oil pressure is automatically adjusted according to the water pressure ratio (at the same time, the third electromagnet DT60 is energized, and the main hydraulic cylinder 34 is in a floating state).

[0048] 3, (DN80-300) release high pressure to keep low pressure water 2 hours: auxiliary cylinder 35 decompression small proportion of pressure reducing valve 031 according to water pressure drop (while the third electromagnet DT603 power, main cylinder 34 in floating state), auxiliary cylinder 35 into the pressure sensor to 0.3MP around the signal (three electromagnet DT603 power off).

[0049] 4, auxiliary cylinder 35 retreat: five electromagnet DT605 power, (while the third electromagnet DT603 power, main cylinder 34 in floating state).

[0050] 5, (DN350-900) test pressure main cylinder 34 in and out through auxiliary cylinder 35 in and out; auxiliary cylinder 35 into: four electromagnet DT604 power, while small proportion of pressure reducing valve 031 power (pressure setting value according to 3-5MP), auxiliary cylinder 35 pressure sensor has 1-5MP around the signal, small proportion of pressure reducing valve 031 pressure setting to 1-4MP around (according to low pressure water filling no leakage), high pressure water filling main cylinder 34 oil pressure according to water pressure ratio automatic adjustment one electromagnet DT601 power (main cylinder 34 pressure sensor has 0.6MP around, auxiliary cylinder 35 proportion of valve oil pressure to 0); main cylinder 34 retreat: five electromagnet DT605 power, while the third electromagnet DT603 power (main cylinder 34 in floating state) and one electromagnet DT601 and two electromagnet DT602 power, main cylinder 34 proportion of valve to 0.

[0051] 6, (DN350-900) release high pressure to keep low pressure water 2 hours: main cylinder 34 decompression, large proportion of pressure reducing valve 032 according to water pressure drop (while one electromagnet DT601, two electromagnet DT602 power), main cylinder 34 pressure sensor to 0.3MP around the signal (three electromagnet DT603 power off).

[0052] In addition, it needs to be explained that the specific embodiments described in the specification, the shape of the zero, components, the name taken, etc. can be different, the above described in the specification is only an example of the structure of the utility model structure. Any equivalent changes or simple changes according to the patent concept described in the structure, features and principles, are included in the protection scope of the patent. The skilled in the art of the utility model can make various modifications or supplement or adopt similar way instead of the specific embodiments described, as long as not deviate from the structure of the utility model or beyond the scope defined by the present claims, should belong to the protection scope of the utility model.

Claims

1. A hydraulic press, comprising a movable wall (1), a fixed wall (2), a roller (4), and a base (6), wherein the movable wall (1) and the fixed wall (2) are respectively fixed at both ends of the base (6), and the roller (4) is located between the movable wall (1) and the fixed wall (2), characterized in that: It also includes a jacking device (3), a socket sealing plate (8) and a spigot sealing plate (9). The jacking device (3) is installed on the movable wall (1), the socket sealing plate (8) is installed on the jacking device (3), and the spigot sealing plate (9) is installed on the fixed wall (2). The socket sealing plate (8) and the spigot sealing plate (9) cooperate. The jacking device (3) includes a jacking trolley (31), wheels (32), a guide rail (33), a main oil cylinder (34) and an auxiliary oil cylinder (35). The cylinder barrels of the main oil cylinder (34) and the auxiliary oil cylinder (35) are both installed on the movable wall (1). The piston rods of the main oil cylinder (34) and the auxiliary oil cylinder (35) are connected to the jacking trolley (31). The wheels (32) are installed at the bottom of the jacking trolley (31). The guide rail (33) is installed on the base (6). The wheels (32) and the guide rail (33) cooperate.

2. The hydraulic press according to claim 1, characterized in that: It also includes a tie rod (5), the two ends of which are connected to the movable wall (1) and the fixed wall (2) respectively.

3. The hydraulic press according to claim 1, characterized in that: It also includes a pipe clamping device (7) for clamping small-diameter pipe fittings during water pressure testing to prevent them from bending. The pipe clamping device (7) is located between two rollers (4).

4. The hydraulic press according to claim 1, characterized in that: The socket sealing plate (9) is a large-diameter socket sealing plate or a small-diameter socket sealing plate.

5. The hydraulic press according to claim 1, characterized in that: The number of auxiliary cylinders (35) is two, and the main cylinder (34) is located between the two auxiliary cylinders (35).

6. The hydraulic press according to claim 1, characterized in that: The two sides of the socket sealing plate (9) are respectively provided with sealing rings (91) and connecting flanges (92), and the connecting flanges (92) are connected to the fixed wall (2).

7. The hydraulic press according to claim 6, characterized in that: A water inlet (93) is installed on the inlet sealing plate (9).

8. A hydraulic system for a hydraulic press as described in any one of claims 1-7, characterized in that: This includes an electro-hydraulic directional valve (01), a first solenoid directional valve (021), a second solenoid directional valve (022), a small proportional pressure reducing valve (031), a large proportional pressure reducing valve (032), a double one-way throttle valve (04), a first high-pressure filter (051), a second high-pressure filter (052), a first electromagnet (DT601), and a second electromagnet (DT602). The electro-hydraulic directional valve (01) is equipped with a fourth electromagnet (DT604) and a fifth electromagnet (DT605). The first solenoid directional valve (021) is equipped with a third electromagnet (DT603), and the second solenoid directional valve (022) is equipped with a sixth electromagnet (DT606). The auxiliary cylinder (3) 5) Connected to a small-proportion pressure reducing valve (031), which is connected to an electro-hydraulic directional valve (01), which is connected to a first high-pressure filter (051), the main cylinder (34) is connected to a first solenoid directional valve (021), the main cylinder (34) is connected to a second electromagnet (DT602), which is connected to a first electromagnet (DT601), which is connected to a large-proportion pressure reducing valve (032), which is connected to a second high-pressure filter (052), and the second solenoid directional valve (022) is connected to a double one-way throttle valve (04).

9. The hydraulic system of the water press according to claim 8, characterized in that: Both the main oil cylinder (34) and the auxiliary oil cylinder (35) are connected to the auxiliary oil tank.

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