CN212621939U

CN212621939U - Ductile cast iron pipe hydraulic press

Info

Publication number: CN212621939U
Application number: CN202021148070.9U
Authority: CN
Inventors: 张国生; 张永杰; 闫海峰; 林雪川; 梅燕娜
Original assignee: Guangdong Xinxing Ductile Iron Pipes Co ltd
Current assignee: Guangdong Xinxing Ductile Iron Pipes Co ltd
Priority date: 2020-06-19
Filing date: 2020-06-19
Publication date: 2021-02-26
Anticipated expiration: 2030-06-19

Abstract

The utility model discloses a nodular cast-iron pipe hydraulic press relates to nodular cast-iron pipe production technical field. Including base, high pressure water pipe, socket barricade, bellmouth barricade, fixed mounting has first pneumatic cylinder on the socket barricade, and fixed mounting has the pusher on the output shaft of first pneumatic cylinder, and the other end fixed mounting that pushes away has the socket end cap, and the inside T shape exhaust drain pipe that is provided with of socket end cap, exhaust drain pipe one end with high pressure water pipe communicates each other, and both ends are provided with exhaust drain valve respectively in addition, and the high pressure water pipe other end is provided with the bellmouth end cap, and the bellmouth end cap sets up fixed mounting and is in on the bellmouth barricade, fixed mounting has trusteeship device on the base, trusteeship device swings under the drive action of second pneumatic cylinder, trusteeship device is last to. The utility model discloses can realize that nodular cast-iron pipe mixes the line, reduce the nodular cast-iron pipe crooked, improve rubber ring life, reach the production improvement rhythm, improve product quality, material saving purpose.

Description

Ductile cast iron pipe hydraulic press

Technical Field

The utility model relates to a nodular cast-iron pipe production technical field, concretely relates to nodular cast-iron pipe hydraulic press.

Background

In the production line of the nodular cast iron pipe, the hydraulic press is used for detecting the water pressure withstand voltage of the production line of the nodular cast iron pipe, and the condition that products delivered from a factory meet the water pressure test requirement and the pipelines have no leakage is ensured. The hydraulic press testing process comprises the following steps: the nodular cast iron pipe is sealed at two ends through the bell and spigot plugs, high-pressure water is filled in the pipe, the pressure is maintained for a certain time, the water leakage phenomenon does not occur, and the pipe is communicated with the next process after the detection is qualified. When a water pressure test is carried out, under the condition that the pressure in the pipe is constant, the pressure applied to the socket plug is multiplied along with the increase of the pipe type, the first hydraulic cylinder needs to bear large pressure to overcome the pressure, but if the reaction force is applied to the pipe body for a small-size pipe, the nodular cast iron pipe is easily bent, so that the traditional socket plug mostly adopts a floating structure, and a part of force applied to the pipe body is offset through the water pressure; however, for a floating structure, because the water pressure area is increased, the pressure borne by the pipe and the sealing rubber ring is increased, the socket plug is easily damaged, the plug needs to be frequently replaced, and the rhythm of a production line and the labor cost are seriously influenced.

SUMMERY OF THE UTILITY MODEL

The utility model provides a pair of nodular cast-iron pipe hydraulic press aims at solving the problem that exists among the above-mentioned background art.

In order to realize the technical purpose, the utility model discloses a following technical scheme:

a ductile cast iron pipe hydraulic press comprises a base and a high-pressure water pipe, wherein one end of the base is fixedly provided with a socket retaining wall, the other end of the base is fixedly provided with a socket retaining wall, a first hydraulic cylinder is fixedly arranged on the socket retaining wall, a piston rod is fixedly arranged on an output shaft of the first hydraulic cylinder, the piston rod penetrates through the socket retaining wall and is fixedly connected with a push head, the other end of the push head is fixedly provided with a socket plug matched with the inner diameter of the high-pressure water pipe, a T-shaped exhaust drain pipe is arranged inside the socket plug, one end of the exhaust drain pipe is mutually communicated with the high-pressure water pipe, the other two ends are respectively provided with an exhaust drain valve, the other end of the high-pressure water pipe is provided with a socket plug matched with the inner diameter of the high-pressure water pipe, the socket, the pipe supporting device swings under the driving action of the second hydraulic cylinder, and a V-shaped carrier roller for supporting the high-pressure water pipe is arranged on the pipe supporting device.

The utility model discloses in, the socket end cap with one side fixed mounting that high pressure water pipe is linked together has the baffle, be provided with a plurality of recesses on the baffle, fixed mounting has the sealing washer in every recess.

The utility model discloses in, push away the head with it has the push pedal still to fix between the socket end cap, push pedal one side with socket end cap fixed connection, push pedal opposite side fixed mounting have push away the head, just T shape exhaust drain pipe with fixed mounting has the sealing washer between the socket end cap.

Furthermore, the bottom of the pushing head is also fixedly provided with a supporting rod, the bottom of the supporting rod is fixedly provided with a pulley, and the pulley is arranged on a horizontal sliding rail arranged on the upper part of the base in a sliding manner.

The utility model discloses, trusteeship device is including two sets of, sets up respectively the both ends of high pressure water pipe.

Further, trusteeship device includes the mounting panel, mounting panel bottom one side is rotated through the bearing and is installed the crank, fixed mounting has the gear on the crank, the meshing of gear bottom is provided with the ratch, the ratch is by second hydraulic cylinder drive back and forth movement, and crank other end fixed mounting has the rocker, rocker one side top fixed mounting has the V-arrangement bearing roller.

Furthermore, a piston rod of the second hydraulic cylinder is connected with a gear rod of one group of the pipe supporting devices, a connecting rod is fixedly installed at the end part of the side wall of the gear rod, and a gear rod of the other pipe supporting device is fixedly installed at the other end of the connecting rod.

Furthermore, the connecting rod is a telescopic rod.

The utility model discloses, still include pressure sensor, the trip valve of intaking and PID controller, pressure sensor is used for detecting the inside pressure of high-pressure water pipe, first pneumatic cylinder is connected with first oil tank and second oil tank respectively, be provided with first pressure oil in the first oil tank, be provided with second pressure oil in the second oil tank, and be provided with ordinary control valve on the first oil tank, be provided with the proportional pressure control valve on the second oil tank, ordinary control valve, proportional pressure control valve with trip valve and pressure sensor of intaking respectively with PID controller electric connection.

Compared with the prior art, the utility model discloses following beneficial effect has: (1) when the socket plug used by the utility model is detected, the exhaust does not float when the water is passed, and the socket plug has the advantage of long service life; (2) the high-pressure water pipe can be placed at a specified position through the pipe supporting device, and time and labor are saved.

Drawings

FIG. 1: the structure of the utility model is shown schematically;

FIG. 2: a schematic structural diagram of a conventional socket plug;

FIG. 3: the structure schematic diagram of the socket plug in the utility model;

FIG. 4: the utility model discloses well trusteeship device department's side view.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1, 3 and 4, the ductile cast iron pipe hydraulic press comprises a base 1 and a high-pressure water pipe 2, wherein one end of the base 1 is fixedly provided with a socket retaining wall 3, the other end of the base 1 is fixedly provided with a bell retaining wall 4, the socket retaining wall 3 is fixedly provided with a first hydraulic cylinder 5, an output shaft of the first hydraulic cylinder 5 is fixedly provided with a piston rod, the piston rod passes through the socket retaining wall 3 and is fixedly connected with a push head 6, the other end of the push head is fixedly provided with a socket plug 7 matched with the inner diameter of the high-pressure water pipe 2, a T-shaped exhaust drain pipe 14 is arranged inside the socket plug 7, one end of the exhaust drain pipe 14 is mutually communicated with the high-pressure water pipe 2, the other two ends are respectively provided with an exhaust drain valve 8, the other end of the high-pressure water pipe 2 is provided with a bell plug 9, the pipe supporting device swings under the driving action of the second hydraulic cylinder 10, and a V-shaped carrier roller 11 for supporting the high-pressure water pipe 2 is arranged on the pipe supporting device.

As shown in fig. 2, when water enters the socket plug, the conventional socket plug pushes the floating head 24 to move to the left, which increases the water pressure area, increases the pressure borne by the pipe and the sealing rubber ring, and easily causes the socket plug to be damaged.

Before testing, the nodular cast iron pipe is conveyed to a supporting pipe position through a chain, then a piston rod of a first hydraulic cylinder controls a swing frame to swing and rotate to rise, the nodular cast iron pipe on the chain is lifted by a V-shaped carrier roller on the swing frame to reach a designated position, and then the socket plugs are controlled by the first hydraulic cylinder to seal two ends of the nodular cast iron pipe, which is common knowledge of persons skilled in the art and is not explained further here. Because the structure of the traditional socket plug shown in figure 2 is changed by the socket plug adopted in the device, the T-shaped exhaust drain pipe 14 is arranged inside the socket plug, one end of the exhaust drain pipe 14 is communicated with the high-pressure water pipe 2, and the exhaust drain valves 8 are respectively arranged at the other two ends of the exhaust drain pipe, so that the exhaust is not floated when passing water during detection, the device has the advantage of long service life, and meanwhile, the high-pressure water pipe can be placed at a specified position through the pipe supporting device, so that the time and the labor are saved.

Continuing to refer to fig. 3, one side fixed mounting that socket end cap and high-pressure water pipe are linked together in the utility model has baffle 25, is provided with a plurality of recesses on the baffle 25, and fixed mounting has sealing washer 13 in every recess. Like this, through selecting sealing washer 13 and the high pressure water pipe aperture phase-match in the different recesses, can adapt to the high pressure water pipe of multiple specification, during the water pressure detection, utilize proportional pressure control valve, realize the automatic adjustment of first pneumatic cylinder oil pressure along with water pressure change of drive socket end cap, can reduce socket end cap atress, protection rubber ring and hydraulic press whole equipment atress are superior to the floating end cap of tradition.

Taking DN80-300 small-specification cast iron pipes as an example (can be popularized to medium and large-specification cast iron pipes):

in order to prevent the cast iron pipe from being bent during water pressure detection due to too large stress, the conventional socket plug is provided with four plugs: DN80, DN100 one plug, DN150 one plug, DN200 one plug, DN250, DN300 one plug;

the socket plug in the utility model is a device which can realize the hydraulic pressure detection of the cast iron pipe with DN80-300 small specifications;

the advantages are that: the production line does not need to frequently replace the plug.

Meanwhile, the socket plug of the present invention can be better than the conventional floating plug by following specific examples.

The ductile iron pipe is small in stress and small in stress of water pressure detection

and (3) calculating:

(1) because floating socket end cap, the head that floats in the balanced end cap of water pressure detection floats, and it is S3 to set for the first area of floating, and the first water pressure that floats keeps balance with the driving cylinder oil pressure:

therefore, the water pressure detection is balanced: p1 × S3 ═ P2 × S21; p21 ═ P1 XS 3/S2

(2) The utility model discloses the socket end cap of well adoption is not floated, and actuating cylinder oil pressure and the inside water pressure of cast iron pipe keep balance, set for cast iron pipe bellmouth maximum area S1, calculation balance formula:

therefore, the water pressure detection is balanced: p1 × S1 ═ P2 × S22; p22 ═ P1 XS 1/S2

And (3) comparison: p21 ═ P1 XS 3/S2

P22＝P1×S1/S2

Since the floating head area S3 is compared with the bell mouth area S1 of the cast iron pipe: s3> S1, thus P21< P22.

According to above data calculation, the utility model discloses a socket end cap is little than the floating atress of conventionality for high-pressure water pipe atress is little when water pressure detects, and the sealed rubber ring atress is little, and water pressure check out test set atress is little, prevents that the cast iron pipe is crooked, improves the rubber ring life-span, equipment reliability.

The utility model discloses in, still fixed mounting has push pedal 12 between push head 6 and socket end cap 7, push pedal 12 one side and socket end cap 7 fixed connection, and 12 opposite side fixed mounting of push pedal have push head 6, and fixed mounting has sealing washer 13 between T shape exhaust drain pipe 14 and the socket end cap 7. The push plate 12 has a large sectional area, and therefore, the reaction force of the water pressure to the first hydraulic cylinder 5 can be reduced.

The bottom of the pushing head 6 is also fixedly provided with a supporting rod 15, the bottom of the supporting rod 15 is fixedly provided with a pulley 16, and the pulley 16 is arranged on a horizontal sliding rail 17 arranged at the upper part of the base 1 in a sliding manner. The pulley 16 is arranged on the horizontal sliding rail 17 in a sliding mode, so that the movement of the pushing head 6 can be guided, and the socket plug 7 connected with the pushing head 6 is prevented from being deviated during movement, so that poor sealing is caused, and the detection result is influenced.

The utility model discloses, trusteeship device is including two sets of, sets up the both ends at high-pressure water pipe 2 respectively. The supporting tube device comprises a mounting plate 18, a crank 19 is rotatably mounted on one side of the bottom of the mounting plate 18 through a bearing, a gear 20 is fixedly mounted on the crank 19, a toothed bar 21 is meshed with the bottom of the gear 20, the toothed bar 21 is driven by a second hydraulic cylinder 10 to move back and forth, a swing frame 22 is fixedly mounted at the other end of the crank 19, and a V-shaped carrier roller 11 is fixedly mounted at the top of one side of the swing frame 22. Wherein, the piston rod of the second hydraulic cylinder 10 is connected with the rack bar 21 of one of the tube supporting devices, the end of the side wall of the rack bar 21 is fixedly provided with a connecting rod 23, and the other end of the connecting rod 23 is fixedly provided with the rack bar 21 of the other tube supporting device. The second hydraulic cylinder 10 drives the rack bar 21 to move left and right, so that the gear 20 can be driven to rotate, the swing frame 22 is driven to rotate and ascend through the rotation of the gear 20, the nodular cast iron pipes on the chain are lifted by the V-shaped carrier roller 11 on the swing frame 22 to reach the designated position, and time and labor are saved.

Wherein the connecting rod 23 is a telescopic rod. The pipeline structure can be specifically composed of two sections of hollow pipelines, each section of pipeline is provided with a plurality of through holes matched with each other, the position of one section of pipeline on the other section of pipeline is moved to reach a specified distance, then the pipeline structure is fastened by penetrating through the through holes by using screws, the pipeline structure can be adaptively adjusted according to different lengths of high-pressure water pipes, and the application range is enlarged.

During detection, firstly, the first hydraulic cylinder rapidly drives the push head under the action of first pressure oil to enable the nodular cast iron pipe to be in contact with the socket plug and the socket plug, and the common control valve closes the first pressure oil; the proportional pressure valve gives a lower initial pressure value of the first hydraulic cylinder under the action of the second pressure oil to ensure the sealing of the nodular cast iron pipe, then the water inlet cut-off valve is opened, water is filled into the nodular cast iron pipe, the pressure sensor detects the pressure value of the water and feeds the pressure value to the PID controller, the PID controller transmits a signal to the proportional pressure valve to control the pressure value of the proportional pressure valve, the oil pressure of the first hydraulic cylinder is automatically adjusted according to the change of the water pressure, the mixed threading of the nodular cast iron pipe can be realized, the bending of the nodular cast iron pipe is reduced, the service life of a rubber ring is prolonged, and the purposes of improving the production rhythm, improving the product quality and. This circuit control system is common knowledge of those skilled in the art and will not be further explained herein.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a nodular cast-iron pipe hydraulic press which characterized in that: comprises a base and a high-pressure water pipe, wherein one end of the base is fixedly provided with a socket retaining wall, the other end of the base is fixedly provided with a socket retaining wall, the socket retaining wall is fixedly provided with a first hydraulic cylinder, an output shaft of the first hydraulic cylinder is fixedly provided with a piston rod, the piston rod penetrates through the socket retaining wall and is fixedly connected with a push head, the other end of the push head is fixedly provided with a socket plug matched with the inner diameter of the high-pressure water pipe, a T-shaped exhaust drain pipe is arranged inside the socket plug, one end of the exhaust drain pipe is mutually communicated with the high-pressure water pipe, the other two ends of the exhaust drain pipe are respectively provided with an exhaust drain valve, the other end of the high-pressure water pipe is provided with a socket plug matched with the inner diameter of the high-pressure water pipe, the socket plug is fixedly arranged on the, and a V-shaped carrier roller for supporting the high-pressure water pipe is arranged on the pipe supporting device.

2. The hydraulic press for ductile cast iron pipes as claimed in claim 1, characterized in that: the faucet plug and one side that high pressure water pipe is linked together fixed mounting have the baffle, be provided with a plurality of recesses on the baffle, fixed mounting has the sealing washer in every recess.

3. The hydraulic press for ductile cast iron pipes as claimed in claim 2, characterized in that: the push head with still fixed mounting has the push pedal between the socket end cap, push pedal one side with socket end cap fixed connection, push pedal opposite side fixed mounting have the push head, just T shape exhaust drain pipe with fixed mounting has the sealing washer between the socket end cap.

4. The hydraulic press for ductile cast iron pipes as claimed in claim 3, characterized in that: the push head is characterized in that a supporting rod is further fixedly mounted at the bottom of the push head, a pulley is fixedly mounted at the bottom of the supporting rod, and the pulley is arranged on a horizontal sliding rail arranged at the upper part of the base in a sliding mode.

5. The hydraulic press for ductile cast iron pipes as claimed in claim 1, characterized in that: the tube supporting devices comprise two groups which are respectively arranged at two ends of the high-pressure water pipe.

6. The hydraulic press for ductile cast iron pipes as claimed in claim 5, characterized in that: the trusteeship device includes the mounting panel, mounting panel bottom one side is rotated through the bearing and is installed the crank, fixed mounting has the gear on the crank, the meshing of gear bottom is provided with the ratch, the ratch is by second hydraulic cylinder drive back and forth movement, and crank other end fixed mounting has the rocker, rocker one side top fixed mounting has the V-arrangement bearing roller.

7. The hydraulic press for ductile cast iron pipes as claimed in claim 6, characterized in that: and a piston rod of the second hydraulic cylinder is connected with one group of gear rods of the pipe supporting devices, connecting rods are fixedly installed at the end parts of the side walls of the gear rods, and the gear rod of the other pipe supporting device is fixedly installed at the other end of each connecting rod.

8. The hydraulic press for ductile cast iron pipes as claimed in claim 7, characterized in that: the connecting rod is a telescopic rod.

9. The hydraulic press for ductile cast iron pipes according to any one of claims 1 to 8, characterized in that: still include pressure sensor, the trip valve of intaking and PID controller, pressure sensor is used for detecting the intraductal pressure of high pressure water, first pneumatic cylinder is connected with first oil tank and second oil tank respectively, be provided with first pressure oil in the first oil tank, be provided with second pressure oil in the second oil tank, and be provided with ordinary control valve on the first oil tank, be provided with the proportional pressure control valve on the second oil tank, ordinary control valve, proportional pressure control valve with trip valve and pressure sensor of intaking respectively with PID controller electric connection.