CN219038784U

CN219038784U - Stable pressure mechanism for measuring laminating force of shield tail sealing brush

Info

Publication number: CN219038784U
Application number: CN202222706596.XU
Authority: CN
Inventors: 贾明
Original assignee: Kunshan Zhongbei Machinery Equipment Co ltd
Current assignee: Kunshan Zhongbei Machinery Equipment Co ltd
Priority date: 2022-10-13
Filing date: 2022-10-13
Publication date: 2023-05-16
Anticipated expiration: 2032-10-13

Abstract

The utility model belongs to the technical field of test equipment, and relates to a stable pressure mechanism for measuring the laminating force of a shield tail sealing brush, which comprises a lifting plate with a through hole, a pressing plate positioned below the lifting plate and a press arranged above the lifting plate, wherein a pressure sensor is arranged at the lower part of the press, a pressing rod is arranged at the upper part of the pressing plate, an upper guide cylinder for guiding the pressure sensor to lift is arranged at the upper part of the through hole, a lower guide cylinder for guiding the pressing rod to lift is arranged at the lower part of the through hole, the pressure sensor and the pressing rod transmit pressure through a steel ball, the center of the lower end of the pressure sensor is provided with a concave spherical surface matched with the steel ball, and the center of the upper end of the pressing rod is provided with an upper concave spherical surface matched with the steel ball. The utility model can transmit downward pressure by the steel ball positioned on the central axis, avoid the deviation of the pressure direction and ensure the accuracy of the test of the pasting force of the shield tail sealing brush.

Description

Stable pressure mechanism for measuring laminating force of shield tail sealing brush

Technical Field

The utility model relates to the technical field of test equipment, in particular to a stable pressure mechanism for measuring the laminating force of a shield tail sealing brush.

Background

The shield tunneling machine is a special engineering machine for tunneling, integrates light, mechanical, electric, liquid, sensing and information technologies, has the functions of excavating and cutting soil body, rock, conveying soil slag, assembling tunnel lining, measuring, guiding and correcting errors and the like, relates to multi-discipline technologies such as geology, civil engineering, machinery, mechanics, hydraulic, electric, control, measuring and the like, and has extremely high reliability requirements to design and manufacture of 'body cutting' according to different geology. Shield tunneling machines are widely used in subway, railway, highway, municipal, hydroelectric and other tunnel engineering. With the development of urban construction in China, underground projects such as underground rail transit and river crossing tunnels are increasingly increased, the diameter of a shield machine used for tunnel shield is increasingly larger, but the gap between shield tails corresponding to a large shield is also larger, the requirement on the use tightness is strict, and the sealing safety of the construction process is directly influenced by the fitting performance of a shield tail sealing brush on segments in the tunnel.

The shield tail brush is used for maintaining an oil seal, sealing oil can be filled into the steel wire bundles of the shield tail brush, and the steel wire bundles are pressed on the pipe piece wall in the tunnel by means of elasticity of the elastic sheet, so that external water slurry is prevented from flowing into the shield machine. The shield tail brush needs to keep enough sealing performance for the segments in the tunnel when working, and enough adhesive force is required to be generated when the shield tail brush is pressed to a specific height. Before leaving the factory, the shield tail brush needs to be subjected to laminating force measurement so as to ensure that the product meets the sealing requirement.

In the prior art, the test of the bonding force needs to adopt a pressing plate to compress the shield tail brush from the vertical direction, so that the shield tail brush is bent and deformed, and the bonding force is represented by the magnitude of the forward reverse elasticity generated by the shield tail brush pressed to a specific height. However, during testing, the deformation generated by the shield tail brush is that the steel wire brush is pressed into an arc shape, the tail end of the steel wire is deformed downwards, lateral deformation is generated, the pressing plate can prevent the lateral deformation after contacting the tail end of the steel wire, and then larger lateral reaction force is generated, so that the friction force in guiding is increased. In addition, the pressure sensor is biased, and accuracy of detection results is affected.

There is therefore a need for an improved pressure mechanism that avoids the above problems.

Disclosure of Invention

The utility model mainly aims to provide a stable pressure mechanism for measuring the laminating force of a shield tail sealing brush, which can enable the reverse pressure generated by a tested object to act on the central position of a pressure sensor and ensure the accuracy of the laminating force test.

The utility model realizes the aim through the following technical scheme: a stable pressure mechanism for shield tail sealing brush laminating force measurement, including well have fenestrate lifter plate, be located the clamp plate of lifter plate below and locate the press of lifter plate top, the lower part of press has pressure sensor, the upper portion of clamp plate has the depression bar, the lifter plate is in fenestrate upper portion is equipped with and is used for guiding pressure sensor goes up guide cylinder that goes up and down, the lifter plate is in fenestrate lower part is equipped with and is used for guiding the lower guide cylinder that the depression bar goes up and down, pressure sensor with pass through steel ball transmission pressure between the depression bar, pressure sensor's lower extreme center has the concave sphere of matching the steel ball, the upper end center of depression bar has the matching the concave sphere of going up of steel ball.

Specifically, the lower surface of lifter plate is equipped with a plurality of guide arms that pass the clamp plate, the lower part of guide arm is connected with a plurality of prevention the clamp plate nut that drops, the nut with be equipped with the spring between the clamp plate, when the steel ball simultaneously with go up concave sphere with concave sphere contacts down, the clamp plate is right the spring does not have the down force.

Further, the through hole of the pressing plate, through which the guide rod passes, is a counter bore with a limiting function on the upper end of the spring.

Specifically, the compression bar is in threaded connection with the clamp plate, still threaded connection has the backstop nut that is used for supporting the clamp plate on the compression bar.

Specifically, the upper portion of depression bar is equipped with the jump ring groove that is used for assembling the jump ring, the external diameter of jump ring is greater than the internal diameter of lower guide cylinder.

Further, the lower guide cylinder is fixed in a mounting sleeve, the lower part of the lower guide cylinder is provided with a first flange surface for being fixed with the lower end of the mounting sleeve, and the mounting sleeve is provided with a second flange surface for being fixed with the lower surface of the lifting plate.

The technical scheme of the utility model has the beneficial effects that:

because the steel ball is positioned on the central axis, the coaxiality of the pressure sensor and the pressure rod can be ensured by the steel ball, and the steel ball can be automatically adjusted to the relative position with the aligned axis when the steel ball is in full contact with the concave spherical surface and the upper concave spherical surface, so that the offset of the pressure direction is avoided. When the press is pressed down, the lifting plate can be lowered, the shield tail sealing brush starts to deform under the acting force of the lower part of the pressing plate, the elastic force of the shield tail sealing brush can act on the pressing plate and then is transmitted to the pressure sensor through the pressing rod and the steel ball, and the steel ball centers the position of the pressure sensor, so that the pressure sensor obtains an accurate pressure value, and the accuracy of the test of the laminating force of the shield tail sealing brush is ensured.

Drawings

FIG. 1 is a partial cross-sectional view of an embodiment stabilized pressure mechanism;

fig. 2 is a partial enlarged view of the position a in fig. 1.

The figures represent the numbers:

1-lifting plate, 11-upper guide cylinder, 12-lower guide cylinder, 121-first flange surface, 13-mounting sleeve and 131-second flange surface;

2-press, 21-pressure sensor;

3-steel balls;

4-pressing plates;

5-compression bars and 51-snap springs;

6-stop nuts;

7-a guide rod;

8-a nut;

9-spring.

Detailed Description

The present utility model will be described in further detail with reference to specific examples.

As shown in fig. 1 and 2, a stable pressure mechanism for measuring the pasting force of a shield tail sealing brush comprises a lifting plate 1 with a through hole (not labeled), a pressing plate 4 positioned below the lifting plate 1 and a pressing machine 2 arranged above the lifting plate 1, wherein a pressure sensor 21 is arranged at the lower part of the pressing machine 2, a pressing rod 5 is arranged at the upper part of the pressing plate 4, an upper guide cylinder 11 for guiding the pressure sensor 21 to lift is arranged at the upper part of the through hole, a lower guide cylinder 12 for guiding the pressing rod 5 to lift is arranged at the lower part of the through hole, pressure is transmitted between the pressure sensor 21 and the pressing rod 5 through a steel ball 3, the center of the lower end of the pressure sensor 21 is provided with a concave spherical surface (not exposed) matched with the steel ball 3, and the center of the upper end of the pressing rod 5 is provided with an upper concave spherical surface (not exposed) matched with the steel ball 3. The pressure sensor 21 can perform vertical lifting movement under the guidance of the upper guide cylinder 11; the pressing bar 5 carries the pressing plate 4 to perform vertical lifting movement under the guidance of the lower guide cylinder 12. Because the steel ball 3 is positioned on the central axis, the coaxiality of the pressure sensor 21 and the pressure lever 5 can be ensured through the steel ball 3, and because the steel ball 3 is in full contact with the concave spherical surface and the concave spherical surface, the steel ball 3 and the concave spherical surface can be automatically adjusted to the relative position with the aligned axes, and the offset of the pressure direction is avoided. When the press 2 is pressed down, the lifting plate 1 also descends, the shield tail sealing brush starts to deform under the acting force of the lower part of the pressing plate 4, the elastic force of the shield tail sealing brush can act on the pressing plate 4 and then is transmitted to the pressure sensor 21 through the pressing rod 5 and the steel ball 3, and the steel ball 3 centers the position of the pressure sensor 21, so that the pressure sensor 21 obtains an accurate pressure value, and the accuracy of the test of the attaching force of the shield tail sealing brush is ensured.

As shown in fig. 1, the lower surface of the lifting plate 1 is provided with a plurality of guide rods 7 penetrating through the pressing plate 5, the lower parts of the guide rods 7 are connected with a plurality of nuts 8 for preventing the pressing plate from falling, springs 9 are arranged between the nuts 8 and the pressing plate 5, and when the steel balls 3 are simultaneously contacted with the upper concave spherical surface and the lower concave spherical surface, the pressing plate 5 has no downward pressure on the springs 9. When the press 2 is not pressed down, the pressing plate 5 is hung below the lifting plate 1 by using the guide rod 7 and the nut 8, and the guide rod 7 also plays a role in guiding the lifting of the pressing plate 5. While during testing, the spring 9 can no longer provide upward spring force, otherwise the pressure applied to the pressure sensor 21 increases, resulting in a test value of the applied force that is greater than the true value. After the test is completed, the pressure plate 5 falls again on the spring 9, so that the hard contact does not cause accelerated wear of the parts.

As shown in fig. 1, the through hole of the pressing plate 5 penetrated by the guide rod 7 is a counter bore with a limit function on the upper end of the spring 9. The counter bore is internally provided with a step surface, and the upper end of the spring 9 is propped against the step surface. The counter bore is also provided with an inner wall which can limit the outside of the spring 9, so that the material consumption of the pressing plate 5 is reduced, and the spring 9 can be fixed in position.

As shown in fig. 1, the pressing rod 5 is in threaded connection with the pressing plate 4, and the pressing rod 5 is also in threaded connection with a stop nut 6 for supporting the pressing plate 4. The stop nut 6 can generate tangential force to the pressing plate 4 when being screwed down, so that the pressing rod 5 is prevented from rotating relative to the pressing plate 4, and the falling risk of the pressing plate 4 is reduced.

As shown in fig. 2, a snap spring groove for assembling a snap spring 51 is provided at the upper portion of the compression bar 5, and the outer diameter of the snap spring 51 is larger than the inner diameter of the lower guide cylinder 12. The depression bar 5 is movable from top to bottom for lower guide cylinder 12, has set up jump ring 51 after, if depression bar 5 descends for lower guide cylinder 12, then jump ring 51 can hinder depression bar 5 to continue to deviate from lower guide cylinder 12, also can play the effect that prevents clamp plate 4 from falling like this, has promoted the security of operation.

As shown in fig. 1, the lower guide 12 is fixed in one of the mounting sleeves 13, the lower portion of the lower guide 12 has a first flange surface 121 for fixing with the lower end of the mounting sleeve 13, and the mounting sleeve 13 has a second flange surface 131 for fixing with the lower surface of the lifter plate 1. Since the upper and lower positions of the lower guide cylinder 12 are blocked by the clamp spring 51 and the pressing plate 5 respectively, the first flange surface 121 and the mounting sleeve 13 need to be fixed by bolts when the device is mounted, then the device is sleeved on the pressing rod 5 provided with the pressing plate 4, then the clamp spring 51 is fixed, the lower guide cylinder 12 is penetrated into the through hole, and finally the second flange surface 131 is fixed on the lifting plate 1 by bolts. This completes the assembly of the compression bar 5.

As shown in fig. 1, the lower surface of the lifter plate 1 is provided with a concave surface (not labeled) for embedding the second flange surface 131. So that the coaxiality of the perforation, the mounting sleeve 13, the lower guide cylinder 12 and the compression bar 5 can be ensured.

What has been described above is merely some embodiments of the present utility model. It will be apparent to those skilled in the art that numerous locking and improvement can be made without departing from the inventive concept.

Claims

1. A stable pressure mechanism for shield tail sealing brush laminating force measurement, including well have fenestrate lifter plate, be located the clamp plate of lifter plate below with locate the press of lifter plate top, the lower part of press has pressure sensor, the upper portion of clamp plate has the depression bar, the lifter plate is in fenestrate upper portion is equipped with and is used for guiding the last guide cylinder that pressure sensor goes up and down, the lifter plate is in fenestrate lower part is equipped with and is used for guiding the lower guide cylinder that the depression bar goes up and down, its characterized in that: the pressure sensor and the pressure rod transmit pressure through the steel ball, the center of the lower end of the pressure sensor is provided with a concave spherical surface matched with the steel ball, and the center of the upper end of the pressure rod is provided with an upper concave spherical surface matched with the steel ball.

2. The stable pressure mechanism for shield tail sealing brush fit measurement according to claim 1, wherein: the lower surface of lifter plate is equipped with a plurality of guide arms that pass the clamp plate, the lower part of guide arm is connected with a plurality of prevention the clamp plate nut that drops, the nut with be equipped with the spring between the clamp plate, when the steel ball simultaneously with go up concave spherical surface with concave spherical surface contact down, the clamp plate is right the spring does not have down force.

3. The stable pressure mechanism for shield tail sealing brush fit measurement according to claim 2, wherein: the through hole of the pressing plate, through which the guide rod passes, is a counter bore with a limiting function on the upper end of the spring.

4. The stable pressure mechanism for shield tail sealing brush fit measurement according to claim 1, wherein: the pressing rod is in threaded connection with the pressing plate, and a stop nut used for propping against the pressing plate is further in threaded connection with the pressing rod.

5. The stable pressure mechanism for shield tail sealing brush fit measurement according to claim 1, wherein: the upper part of the compression bar is provided with a clamp spring groove for assembling a clamp spring, and the outer diameter of the clamp spring is larger than the inner diameter of the lower guide cylinder.

6. The stable pressure mechanism for shield tail sealing brush fit measurement according to claim 5, wherein: the lower guide cylinder is fixed in a mounting sleeve, the lower part of the lower guide cylinder is provided with a first flange surface used for being fixed with the lower end of the mounting sleeve, and the mounting sleeve is provided with a second flange surface used for being fixed with the lower surface of the lifting plate.

7. The stable pressure mechanism for shield tail sealing brush fit measurement according to claim 6, wherein: the lower surface of the lifting plate is provided with a concave surface which is used for being embedded into the second flange surface.