A pressure testing device for a dense paste delivery conduit

Abstract

The utility model relates to shield muck pipeline transportation technical field, concretely is a kind of dense paste conveying pipeline pressure testing device, including base pipe, the middle position of base pipe is equipped with oil cylinder, and the space between packing seal and diaphragm is provided with piston in the inside of oil cylinder, away from base pipe side and close to base pipe side respectively in oil cylinder, the top of oil cylinder is equipped with driving motor, and the top of piston is connected with piston rod that passes through packing seal and is connected with the output end of driving motor, and the shape of diaphragm is consistent with pipeline inner wall, so that diaphragm directly contacts with muck paste, facilitate pressure transmission, and pressure transmission is accurate;Operating clearance can make diaphragm oscillation, carry out self-cleaning, remove the muck adhered to its surface, avoid the problem that muck hardens and thus leads to signal distortion;Pressure transmitter converts pressure signal into electric signal, can be displayed in place through secondary instrument, and also can be transmitted wirelessly through wireless transmitter, and signal is wirelessly transmitted.

Description

TECHNICAL FIELD

[0001] The utility model relates to shield muck pipeline conveying technical field, concretely is a kind of thick paste body conveying pipeline pressure testing device. BACKGROUND

[0002] With the economic and technological development, tunnel construction engineering develops rapidly at home and abroad, and the scale of tunnel construction in China is huge. The earth pressure balance shield tunneling efficiency is high, and the stratum applicability is strong, and it is widely used in tunnel construction. The traditional earth pressure balance shield slag discharge mode has great limitations, recently, more and more projects have put forward the requirements of high efficiency, rapid and long distance tunneling, and the output of muck per unit time is increasing in the construction process, and the construction length of tunnel is increasing. In the field of shield construction, the muck conveying method is continuously improved, the muck paste pipeline conveying method with higher efficiency is used, and the shield muck paste full-closed whole-process pipeline conveying technology avoids dust diffusion and sewage splashing, which is beneficial to the health of construction personnel, completely improves the working mode of tunnel construction, and reduces the conveying cost, and the social and environmental benefits are obvious.

[0003] In the process of muck paste pipeline conveying, pressure detection needs to be carried out in sections to predict pipeline blockage, so as to clean up in time, avoid pipeline and related damage, and improve the conveying efficiency of muck paste. However, the existing slurry pressure gauge is only suitable for the case that the solid phase content of paste is low, and if the solid phase content of muck paste is too large, the transmission pipeline of pressure gauge is easy to scale or block, which leads to inaccurate degree of pressure gauge, and even serious distortion. Due to the viscosity of muck paste, muck is easy to adhere to the inner wall of pipeline, which limits the conveying flow, increases the conveying resistance, and even causes pipeline blockage, which further leads to inaccurate pressure measurement and limits the application of muck paste pipeline conveying.

[0004] Among all the working condition indexes of paste conveying system, pipeline pressure is the most important and direct parameter reflecting the running state of pipeline conveying system. The pressure measurement technology of shield muck thick paste pipeline restricts the popularization of shield muck paste pipeline technology, and the pressure measurement problem of thick paste pipeline has become a problem to be solved urgently. UTILITY MODEL CONTENTS

[0005] (I) Technical problem solved

[0006] In view of the deficiencies of the prior art, the utility model provides a kind of thick paste body conveying pipeline pressure testing device, the diaphragm of the shape consistent with the inner wall of pipeline and the self-cleaning of diaphragm realize the accurate measurement of thick muck paste conveying pipeline pressure and signal remote transmission.

[0007] (II) Technical scheme

[0008] In order to achieve the above object, the utility model provides the following technical scheme: a kind of dense paste conveying pipeline pressure testing device, including base pipe, oil cylinder is installed in the middle position of the base pipe, packing seal and diaphragm are respectively installed in the oil cylinder inner side far from base pipe and close to base pipe, the space between packing seal and diaphragm in the oil cylinder is provided with piston, driving motor is installed at the top of the oil cylinder, piston rod that is connected with the output end of driving motor is connected to the top of the piston and passes through packing seal, the position between diaphragm and piston in the oil cylinder is set as compression space and the compression space is filled with hydraulic oil, pressure transmitter, secondary instrument and wireless transmitter that are in contact with the hydraulic oil in compression space are sequentially installed on one side of the oil cylinder.

[0009] Preferably, the piston is circumferentially provided with a plurality of through holes, and the through holes are uniformly distributed along the circumference.

[0010] Preferably, the driving motor is a reciprocating motor, and the up-down vibration amplitude of the output shaft of the driving motor is 5-15 mm.

[0011] Preferably, the diaphragm vibrates in phase with the piston, and is in an upper convex arc shape when reset, and the arc radius is the same as the inner radius of the base pipe.

[0012] Preferably, the base pipe is provided with a connecting flange at both ends.

[0013] Preferably, the top of the oil cylinder is detachably connected with a mounting bracket through bolts, and the driving motor is fixedly installed on the mounting bracket.

[0014] (Three) beneficial effects

[0015] Compared with the prior art, the utility model provides a kind of dense paste conveying pipeline pressure testing device, with the following beneficial effects:

[0016] 1. The dense paste conveying pipeline pressure testing device, the diaphragm shape is consistent with the inner wall of the pipeline, so that the diaphragm directly contacts the clay paste, facilitating pressure transmission, and the pressure transmission is accurate.

[0017] 2. The dense paste conveying pipeline pressure testing device, the running gap can make the diaphragm oscillate, self-clean, remove the adhered clay on its surface, and avoid the problem of signal distortion caused by hardening of the clay.

[0018] 3. The dense paste conveying pipeline pressure testing device, the pressure transmitter converts the pressure signal into an electrical signal, which can be displayed locally by the secondary instrument or wirelessly transmitted by the wireless transmitter. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1It is the main view structure schematic diagram of the utility model;

[0020] Figure 2 It is the side view structure schematic diagram of the utility model;

[0021] Figure 3 It is Figure 2 The structure schematic diagram of A-A section in it;

[0022] Figure 4 It is Figure 2 The local schematic diagram in it.

[0023] Mark in the drawing: 1, drive motor;2, packing seal;3, piston rod;4, piston;4.1, through hole;5, oil cylinder;6, diaphragm;7, base pipe;8, pressure transmitter;9, secondary instrument;10 wireless transmitter DETAILED DESCRIPTION

[0024] The technical scheme in the embodiments of the utility model will be apparently and completely described below in combination with the drawings in the embodiments of the utility model. Apparently, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the range protected by the utility model.

[0025] Embodiment

[0026] Please refer to Figures 1-4 A dense paste conveying pipeline pressure testing device, including base pipe 7, the middle position of base pipe 7 is installed with oil cylinder 5, packing seal 2 and diaphragm 6 are installed respectively in the oil cylinder 5 away from base pipe side and close to base pipe side, the space between packing seal 2 and diaphragm 6 in the oil cylinder 5 is provided with piston 4, the top end of oil cylinder 5 is installed with drive motor 1, the top end of piston 4 is connected with piston rod 3 passing through packing seal 2 and connected with the output end of drive motor 1, the position between diaphragm 6 and piston 4 in the inside of oil cylinder 5 is set as compression space and the compression space is filled with hydraulic oil, the side of oil cylinder 5 is sequentially installed with pressure transmitter 8, secondary instrument 9 and wireless transmitter 10 in contact with the hydraulic oil in compression space.

[0027] Specifically, the piston 4 is circumferentially provided with a plurality of through holes 4.1, and the through holes 4.1 are uniformly distributed along the circumference. Further, the number of the through holes 4.1 can be four.

[0028] Specifically, the drive motor 1 is a reciprocating motor, and the up-down vibration amplitude of the output shaft of the drive motor 1 is 5-15 mm. Further, the drive motor 1 is set as a large-thrust reciprocating motor, which can simultaneously push the piston to vibrate up and down.

[0029] Specifically, the diaphragm 6 is in phase with the piston 4 in up-down vibration, and is in an upper convex arc shape in reset, with the same arc radius as the inner radius of the base pipe 7. When measuring the pressure of the dense sludge paste conveying pipeline, the diaphragm 6 is in an upper convex arc shape, with the same arc radius as the inner radius of the base pipe 7, thereby ensuring smooth pipeline flow and accurate pressure transmission.

[0030] Specifically, the base pipe 7 is provided with a connecting flange at each end.

[0031] Specifically, the top of the oil cylinder 5 is detachably connected with a mounting rack through bolts, and the driving motor 1 is fixedly installed on the mounting rack.

[0032] In work, the diaphragm 6 is in an upper convex arc shape, with the same arc radius as the inner radius of the base pipe 7, thereby ensuring smooth pipeline flow and accurate pressure transmission.

[0033] When not conveying, the driving motor 1 drives the piston 4 to vibrate up and down, and the hydraulic oil flows up and down through the four through holes 4.1 of the piston 4 with slight lag, thereby driving the diaphragm 6 to vibrate up and down, as shown in the figure. Figure 4 The diaphragm 6 is in phase with the piston 4 in up-down vibration, which can make the surface of the diaphragm 6 repeatedly bend and deform, thereby realizing self-cleaning of the diaphragm.

[0034] It should be noted that the "one embodiment", "embodiment", "exemplary embodiment", "some embodiments" and the like mentioned in the specification represent that the described embodiment can include a specific feature, structure or characteristic, but not necessarily every embodiment includes the specific feature, structure or characteristic. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when a specific feature, structure or characteristic is described in connection with an embodiment, it is within the knowledge of those skilled in the art to realize such feature, structure or characteristic in connection with other embodiments described explicitly or implicitly.

[0035] It should be readily understood that "on", "above" and "over" in the present disclosure should be interpreted in the broadest way, so that "on" not only means "directly on", but also includes the meaning of "on" with intermediate features or layers therebetween, and "above" or "over" not only includes the meaning of "above" or "over", but also includes the meaning of "above" or "over" without intermediate features or layers therebetween (i.e. directly on).

[0036] In addition, spatially relative terms, such as "under", "below", "lower", "above", "upper", and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. The spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. The devices can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0037] Note that, in the description, relative terms such as "first" and "second", and the like, can be used solely to distinguish one from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0038] Finally, it should be noted that the above-described embodiments are merely intended for describing and illustrating, but not limiting, the technical solutions of the present application; even though the present application has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the above embodiments, or equivalently replace some or all of the technical features thereof; and such modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A dense paste delivery conduit pressure testing apparatus, characterized by: The utility model provides a kind of hydraulic cylinder, including base pipe (7), oil cylinder (5) is installed in the middle position of base pipe (7), packing seal (2) and diaphragm (6) are respectively installed in the oil cylinder (5) inside away from base pipe side and close to base pipe side, the space between packing seal (2) and diaphragm (6) in the oil cylinder (5) is provided with piston (4), the top of the oil cylinder (5) is installed with driving motor (1), the top of the piston (4) is connected with piston rod (3) passing through packing seal (2) and being connected with the output end of driving motor (1), the position between diaphragm (6) and piston (4) in the inside of the oil cylinder (5) is set as compression space and is filled with hydraulic oil in compression space, the side of the oil cylinder (5) is sequentially installed with pressure transmitter (8), secondary instrument (9) and wireless transmitter (10) and contacted with the hydraulic oil in compression space.

2. The dense paste pipe line pressure testing apparatus of claim 1, wherein: The piston (4) is provided with a plurality of through holes (4.1) in the circumferential direction, and the through holes (4.1) are uniformly distributed in the circumferential direction.

3. The dense paste pipe line pressure testing apparatus of claim 2, wherein: The driving motor (1) is a reciprocating motor, and the up-down vibration amplitude of the output shaft of the driving motor (1) is 5-15 mm.

4. The dense paste pipe line pressure testing apparatus of claim 3, wherein: The diaphragm (6) vibrates in the same phase as the piston (4), and is in an upper convex arc shape when reset, and the arc radius is the same as the inner radius of the base pipe (7).

5. The dense paste pipe line pressure testing apparatus of claim 4, wherein: The base pipe (7) is provided with a connecting flange at both ends.

6. The dense paste pipe line pressure testing apparatus of claim 5, wherein: The top of the oil cylinder (5) is detachably connected with a mounting bracket through bolts, and the driving motor (1) is fixedly installed on the mounting bracket.

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