A mold device for large-diameter shield segments

Abstract

The present invention discloses a mold device for large-diameter shield segments, which relates to the technical field of segment prefabrication and includes a base, a mold, and an automatic plastering mechanism; the automatic plastering mechanism includes an arc-shaped frame, an automatic plastering sliding mechanism, a fixed pulley mechanism, and a motor driving mechanism; the front part of the arc-shaped frame is arranged above the mold, and the rear part of the arc-shaped frame extends outward and is hinged to the base through a support leg; under the guiding and driving of the motor driving mechanism and the fixed pulley mechanism, the automatic plastering sliding mechanism can perform longitudinal plastering along the longitudinal upper guide groove on the arc-shaped frame, and the top formwork of the mold can perform longitudinal movement along the longitudinal lower guide groove on the arc-shaped frame to switch to different positions at different pouring stages. The advantages of the present invention are as follows: the mold device can realize automatic mechanical plastering, replacing traditional manual plastering; through the longitudinal upper guide groove and lower guide groove of the arc-shaped frame, the sliding space of the plastering plate mechanism and the top formwork is reasonably allocated to adapt to the change of the segment pouring state.

Description

Technical Field

[0001] The present invention belongs to the technical field of precast segment production, and particularly relates to a die device for large-diameter shield segments. Background Art

[0002] Shield segments are important components used for lining tunnels in shield tunneling construction or for lining the inner walls of vertical shafts in the construction of vertical underground garages, and their quality directly affects the safety and service life of tunnels or vertical underground garages.

[0003] In the traditional production process of large-diameter shield segments, manual plastering is required during the curing process to fill pores, cracks, defects, protrusions, etc. on the surface of the segments and improve the flatness and smoothness of the segment surface. However, manual plastering has the following deficiencies:

[0004] (1) Low efficiency: The speed of manual plastering is slow and it is difficult to meet the requirements of large-scale production. (2) Unstable quality: The quality of manual plastering is greatly affected by the technical level of workers, and problems such as uneven plastering and missed plastering are likely to occur. (3) High labor intensity: Manual plastering requires workers to bend down for a long time, with a high labor intensity and it is easy to cause worker fatigue.

[0005] Based on the above deficiencies, there is an urgent need for a die device for large-diameter shield segments that can achieve automatic plastering. Summary of the Invention

[0006] The object of the present invention is to provide a die device for large-diameter shield segments according to the deficiencies of the above-mentioned existing technologies. An automatic plastering mechanism is provided above the die. Under the guiding drive of the motor drive mechanism and the fixed pulley mechanism, the automatic plastering sliding mechanism can perform longitudinal plastering along the longitudinal upper guide groove on the arc-shaped frame, and the top formwork can perform longitudinal movement along the longitudinal lower guide groove on the arc-shaped frame to switch to different positions at different pouring stages.

[0007] The object of the present invention is achieved by the following technical solutions:

[0008] A die device for large-diameter shield segments, the die device comprising a base, a die and an automatic plastering mechanism; the die is arranged on the base and supported by a bracket on the base; the die includes a bottom formwork, two side formworks, two end formworks and a top formwork;

[0009] The number of the automatic plastering mechanisms is two groups and they are symmetrically arranged with the center line of the die as the axis of symmetry; the automatic plastering mechanism includes an arc-shaped frame, an automatic plastering sliding mechanism, a fixed pulley mechanism and a motor drive mechanism; wherein:

[0010] The front part of the arc-shaped frame is arranged above the mold, and the rear part of the arc-shaped frame extends outward and is hinged to the base through a support leg;

[0011] The automatic screeding sliding mechanism includes a guiding bracket, a sliding cross bar, and a screeding plate mechanism. The guiding bracket is fixedly arranged above the front area of the arc-shaped frame. Both ends of the sliding cross bar are slidably assembled on the longitudinal bars of the guiding bracket. The screeding plate mechanism is fixedly arranged below the sliding cross bar and longitudinally moves along with the sliding cross bar;

[0012] The fixed pulley mechanism is fixedly arranged on the base and near the position of the support leg at the rear of the arc-shaped frame;

[0013] The motor driving mechanism includes a motor fixing frame, a driving motor, a cam disk, a first connecting rod, and a second connecting rod. The motor fixing frame is fixedly arranged in the rear area of the arc-shaped frame. The driving motor is fixedly installed on the motor fixing frame. The rotation center of the cam disk is driven to rotate by the driving motor. One end of the first connecting rod is fixed at the rotation center position of the cam disk. The other end of the first connecting rod is hinged to one end of the second connecting rod. The other end of the second connecting rod is hinged to the upper part of the screeding plate mechanism to push the screeding plate mechanism and the sliding cross bar to make longitudinal reciprocating sliding.

[0014] The guiding brackets are respectively arranged on both sides of the arc-shaped frame. The guiding bracket includes vertical bars arranged at the front end and the rear end of the mold and the longitudinal bars arranged between the two vertical bars. Both ends of the sliding cross bar are respectively provided with sliding sleeves, and the sliding sleeves are sleeved on the longitudinal bars to form a sliding assembly relationship; The screeding plate mechanism includes a telescopic sleeve and a screeding plate. The telescopic sleeve includes an upper sleeve fixed on the sliding cross bar and a lower sleeve sleeved on the upper sleeve. A telescopic spring is arranged between the upper sleeve and the lower sleeve. Guide wheels are arranged on both sides of the bottom of the screeding plate.

[0015] The front arc surface of the arc-shaped frame is adaptively fitted to the arc surface of the mold; The arc-shaped frame is composed of arc-shaped longitudinal bars on both sides and cross bars at both ends. Two longitudinal guide grooves, namely an upper longitudinal guide groove and a lower longitudinal guide groove, are arranged on the inner side wall surface of the arc-shaped longitudinal bar; Among them, the guide wheels on both sides of the bottom of the screeding plate are correspondingly assembled in the upper longitudinal guide groove, and the two side edges of the top template of the mold are correspondingly assembled in the lower longitudinal guide groove to realize longitudinal sliding in the arc-shaped frame.

[0016] A conical scraping plate or a roller shaft is arranged at the bottom of the screeding plate to screed the concrete surface in the mold.

[0017] A rear cross bar is arranged in the rear area of ​​the arc-shaped frame, and the motor fixing frame includes two fixing frame columns and a fixing frame longitudinal rod, the two fixing frame columns are respectively fixed on the rear cross bar and the cross bar at the rear end, and the two ends of the fixing frame longitudinal rod are fixedly connected to the two fixing frame columns.

[0018] The fixed pulley mechanism includes a pillar and a fixed pulley fixedly arranged on the top of the pillar, and the cam plate is arranged above the fixed pulley and supported and guided by the fixed pulley; wherein, the cam plate includes a small diameter arc segment, a large diameter arc segment and a smooth segment connecting the two, and in the case of clockwise rotation, the small diameter arc segment drives the wiping panel mechanism to retreat through the first connecting rod and the second connecting rod, and the smooth segment drives the entire arc frame to rotate upward through the fixed pulley support, and the large diameter arc segment drives the wiping panel mechanism to push forward through the first connecting rod and the second connecting rod.

[0019] A high-frequency vibration mechanism is arranged on the base, and the high-frequency vibration mechanism contacts the bottom surface of the mold to conduct vibration.

[0020] The advantages of the present invention are:

[0021] (1) The mold device can realize automated mechanical plastering, replacing traditional manual plastering, which greatly improves work efficiency and plastering quality;

[0022] (2) With the cooperation of the fixed pulley mechanism and the motor drive mechanism, the arc frame has two working postures, that is, it can be set in close contact with the top of the mold, or it can be rotated upward to detach from the mold surface to provide working space for operations such as concrete pouring and demoulding;

[0023] (3) The longitudinal upper and lower guide grooves of the arc frame can reasonably allocate the sliding space of the screed mechanism and the top formwork to adapt to the changes in the casting state of the pipe segment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is an overall side view of the mold device of the large-diameter shield segment in the present invention;

[0025] Figure 2 It is a partial side view of the mold device in the present invention in working state I;

[0026] Figure 3 It is a partial side view of the mold device in the present invention in working state II;

[0027] Figure 4 It is a partial side view of the mold device in the present invention in working state III;

[0028] Figure 5It is a partial side view of the arc-shaped frame and the plastering panel mechanism in the present invention;

[0029] Figure 6 It is the overall plan view of the mold device for large-diameter shield segments in the present invention;

[0030] Figure 7 It is the partial plan view of the mold device for large-diameter shield segments in the present invention.

[0031] As Figure 1-7 , the respective markings in the figure are:

[0032] Mold 1, top formwork 11;

[0033] Base 2, support 21;

[0034] Automatic plastering mechanism 3, arc-shaped frame 31, automatic plastering sliding mechanism 32, vertical rod 321, longitudinal rod 322, sliding sleeve 323, telescopic sleeve 324, plastering panel 325, guide wheel 326, conical scraper 327, sliding cross bar 328, fixed pulley mechanism 33, support column 331, fixed pulley 332, motor drive mechanism 34, cam disc 341, first connecting rod 342, second connecting rod 343, motor fixing frame 344, drive motor 345, support foot 35. Specific embodiments

[0035] The features of the present invention and other related features are further described in detail below through embodiments with reference to the accompanying drawings for the understanding of those skilled in the same industry:

[0036] Embodiment: As Figure 1 , 2 , 3, 4, 5, 6, 7 show, this embodiment specifically relates to a mold device for large-diameter shield segments, and this mold device includes a base 2, a mold 1 and an automatic plastering mechanism 3.

[0037] As Figure 1 , 2 , 3, 4, 5, 6, 7 show, the base 2 is arranged on the floor of the production workshop, and a number of supports 21 are arranged at intervals in the central area thereof for supporting the arc-shaped mold 1. The mold 1 for large-diameter shield segments includes a bottom formwork, two side formworks, two end formworks and a top formwork 11, which are assembled with each other to form a casting cavity for large-diameter shield segments.

[0038] As Figure 1 , 2 , 3, 4, 5, 6, 7 show, the number of the automatic plastering mechanisms 3 is two groups and they are symmetrically arranged with the center line of the mold 1 as the axis of symmetry. Taking one side of the automatic plastering mechanism 3 as an example for description, the automatic plastering mechanism 3 includes an arc-shaped frame 31, an automatic plastering sliding mechanism 32, a fixed pulley mechanism 33 and a motor drive mechanism 34.

[0039] As shown Figure 1 , 2 , 3, 4, 5, 6, and 7, the overall length of the arc-shaped frame 31 is greater than 1 / 2 of the length of the mold 1. That is, the front part of the arc-shaped frame 31 is arranged above the mold 1 and has the same arc surface size as it to form a mutual fit. The rear part of the arc-shaped frame 31 extends outward and is hinged to the base 2 through the support leg 35. Under the action of the arc-shaped frame 31 and the support leg 35 for hinging, the arc-shaped frame 31 can freely select the working posture. That is, the front part of the arc-shaped frame 31 can either be arranged in a fitting manner on the top of the mold 1 or can rotate upward around the hinge point with the support leg 35 under the action of the motor drive mechanism 34 and the fixed pulley mechanism 33.

[0040] As shown Figure 1 , 2 , 3, 4, 5, 6, and 7, the automatic plastering sliding mechanism 32 includes a guiding bracket, a sliding cross bar 328, and a plastering plate mechanism. Among them, the guiding bracket is fixedly arranged above the front area of the arc-shaped frame 31. The guiding bracket is used to provide guidance for the sliding of the sliding cross bar 328. Therefore, it is necessary to ensure that the covered area is greater than half of the area of the mold 1. The guiding brackets are arranged on both sides of the arc-shaped frame 31. The guiding bracket includes vertical rods 321 arranged at the front end and the rear end of the mold 1 and longitudinal rods 322 arranged between the two vertical rods 321. Sliding sleeves 323 are respectively arranged at both ends of the sliding cross bar 328, and the sliding sleeves 323 are sleeved on the longitudinal rods 322 to form a sliding assembly relationship. The plastering plate mechanism is fixedly arranged below the sliding cross bar 328 and moves longitudinally along with the sliding cross bar 328. The plastering plate mechanism includes a telescopic sleeve 324 and a plastering plate 325. The telescopic sleeve 324 includes an upper sleeve fixed on the sliding cross bar 328 and a lower sleeve sleeved on the upper sleeve. A telescopic spring is arranged between the upper sleeve and the lower sleeve. Guide wheels 326 are arranged on both sides of the bottom of the plastering plate 325, and a conical scraping plate 327 is arranged at the bottom of the plastering plate 325. It should be noted that since the arc-shaped frame 31 is in an arc shape adapted to the mold 1, during the movement along with the sliding cross bar 328, the plastering plate 325 and its conical scraping plate 327 also need to adapt to the arc change accordingly to ensure that they always fit on the top surface of the mold 1 for plastering. The telescopic spring in the telescopic sleeve 324 can ensure that the conical scraping plate 327 can always fit on the top surface of the mold 1.

[0041] As shown Figure 1 , 2As shown in Figures 3, 4, 5, 6, and 7, the arc-shaped frame 31 is composed of arc-shaped longitudinal rods on both sides and cross bars at both ends. Two longitudinal guide grooves, namely the upper longitudinal guide groove 311 and the lower longitudinal guide groove 312, are provided on the inner side wall surface of the arc-shaped longitudinal rods. Among them, the guide wheels 326 on both sides of the bottom of the plastering plate 325 are correspondingly assembled in the upper longitudinal guide groove 311, and the two side edges of the top template 11 of the mold 1 are correspondingly assembled in the lower longitudinal guide groove 312 to achieve longitudinal sliding in the arc-shaped frame 31. During the concrete pouring stage, the top template 11 can be slid to the front area of the arc-shaped frame 31 to close the mold 1; when the pouring is completed and plastering is required, the top template 11 can be slid to the rear area of the arc-shaped frame 31 to facilitate the plastering operation of the plastering plate 325.

[0042] As Figure 1 , 2 , 3, 4, 5, 6, and 7 show that the fixed pulley mechanism 33 is fixedly arranged on the base 2 and near the position of the support leg 35 at the rear of the arc-shaped frame 31. The fixed pulley mechanism 33 includes a support column 331 and a fixed pulley 332 fixedly arranged at the top of the support column 331.

[0043] As Figure 1 , 2 , 3, 4, 5, 6, and 7 show that the motor drive mechanism 34 includes a motor fixing frame 344, a drive motor 345, a cam disk 341, a first connecting rod 342, and a second connecting rod 343. The motor fixing frame 344 is fixedly arranged in the rear area of the arc-shaped frame 31, the drive motor 345 is fixedly installed on the motor fixing frame 344, the rotation center of the cam disk 341 is driven to rotate by the drive motor 345, one end of the first connecting rod 342 is fixed at the rotation center position of the cam disk 341, the other end of the first connecting rod 342 is hinged to one end of the second connecting rod 343, and the other end of the second connecting rod 343 is hinged to the upper telescopic sleeve 324 of the plastering plate mechanism to push the plastering plate mechanism and the sliding cross bar 328 to make longitudinal reciprocating sliding. It should be noted that the end of the first connecting rod 342 is fixedly connected to the cam disk 341 and rotates synchronously with it. A rear cross bar is arranged in the rear area of the arc-shaped frame 31. The motor fixing frame 344 includes two fixing frame columns and a fixing frame longitudinal rod. The two fixing frame columns are respectively fixed on the rear cross bar and the cross bar at the rear end, and both ends of the fixing frame longitudinal rod are fixedly connected to the two fixing frame columns.

[0044] As Figure 1 , 2 , 3, 4, 5, 6, and 7 show that the cam disk 341 is arranged above the fixed pulley 332 and is supported and guided by the fixed pulley; among them, the cam disk 341 includes a small-diameter arc section, a large-diameter arc section, and a smooth section connecting the two; As Figure 2 , 3As shown, in the case of clockwise rotation, the small diameter arc segment drives the wiping panel mechanism to retreat through the first connecting rod 342 and the second connecting rod 343; Figure 3 , 4 As shown, the smooth section drives the entire arc frame 31 to rotate upward through the fixed pulley 332, and the large-diameter arc section drives the wiping panel mechanism to push forward through the first connecting rod 342 and the second connecting rod 343.

[0045] In addition, a high-frequency vibration mechanism (not shown in the figure) is arranged on the base 2, and the high-frequency vibration mechanism is in contact with the bottom surface of the mold 1 to transmit vibration.

[0046] The beneficial effects of this embodiment are:

[0047] (1) The mold device can realize automated mechanical plastering, replacing traditional manual plastering, which greatly improves work efficiency and plastering quality;

[0048] (2) With the cooperation of the fixed pulley mechanism and the motor drive mechanism, the arc frame has two working postures, that is, it can be set in close contact with the top of the mold, or it can be rotated upward to detach from the mold surface to provide working space for operations such as concrete pouring and demoulding;

[0049] (3) The longitudinal upper and lower guide grooves of the arc frame can reasonably allocate the sliding space of the screed mechanism and the top formwork to adapt to the changes in the casting state of the pipe segment.

Claims

1. A mold device for large-diameter shield segments, characterized in that The mold device includes a base, a mold, and an automatic plastering mechanism; the mold is arranged on the base and supported by a bracket on the base; the mold includes a bottom template, two side templates, two end templates, and a top template; The number of the automatic plastering mechanisms is two groups and they are symmetrically arranged with the center line of the mold as the axis of symmetry; the automatic plastering mechanism includes an arc-shaped frame, an automatic plastering sliding mechanism, a fixed pulley mechanism, and a motor driving mechanism; wherein: The front part of the arc-shaped frame is arranged above the mold, and the rear part of the arc-shaped frame extends outward and is hinged to the base through a support leg; The automatic plastering sliding mechanism includes a guiding bracket, a sliding cross bar, and a plastering plate mechanism. The guiding bracket is fixedly arranged above the front part area of the arc-shaped frame. Both ends of the sliding cross bar are slidably assembled on the longitudinal rods of the guiding bracket. The plastering plate mechanism is fixedly arranged below the sliding cross bar and longitudinally moves along with the sliding cross bar; The fixed pulley mechanism is fixedly arranged on the base and near the position of the support leg at the rear part of the arc-shaped frame; The motor driving mechanism includes a motor fixing frame, a driving motor, a cam disk, a first connecting rod, and a second connecting rod. The motor fixing frame is fixedly arranged in the rear part area of the arc-shaped frame. The driving motor is fixedly installed on the motor fixing frame. The rotation center of the cam disk is driven to rotate by the driving motor. One end of the first connecting rod is fixed at the rotation center position of the cam disk. The other end of the first connecting rod is hinged to one end of the second connecting rod. The other end of the second connecting rod is hinged to the upper part of the plastering plate mechanism to push the plastering plate mechanism and the sliding cross bar to make longitudinal reciprocating sliding; The guiding brackets are respectively arranged on both sides of the arc-shaped frame. The guiding bracket includes vertical rods arranged at the front end and the rear end of the mold and longitudinal rods arranged between the two vertical rods. Both ends of the sliding cross bar are respectively provided with sliding sleeves and the sliding sleeves are sleeved on the longitudinal rods to form a sliding assembly relationship; the plastering plate mechanism includes a telescopic sleeve and a plastering plate. The telescopic sleeve includes an upper sleeve fixed on the sliding cross bar and a lower sleeve sleeved on the upper sleeve. A telescopic spring is arranged between the upper sleeve and the lower sleeve. Guide wheels are arranged on both sides of the bottom of the plastering plate; The front arc surface of the arc-shaped frame is adaptively fitted with the arc surface of the mold; the arc-shaped frame is composed of arc-shaped longitudinal rods on both sides and cross bars at both ends. Two longitudinal guide grooves, namely an upper longitudinal guide groove and a lower longitudinal guide groove, are arranged on the inner side wall surface of the arc-shaped longitudinal rod. Wherein, the guide wheels on both sides of the bottom of the plastering plate are correspondingly assembled in the upper longitudinal guide groove, and the two side edges of the top template of the mold are correspondingly assembled in the lower longitudinal guide groove to realize longitudinal sliding in the arc-shaped frame; A rear crossbar is arranged in the rear region of the arc-shaped frame. The motor fixing bracket includes two fixing bracket columns and one fixing bracket longitudinal bar. The two fixing bracket columns are respectively fixed on the rear crossbar and the crossbar at the rear end, and the two ends of the fixing bracket longitudinal bar are fixedly connected to the two fixing bracket columns. The fixed pulley mechanism includes a support column and a fixed pulley fixedly arranged at the top of the support column. The cam disc is arranged above the fixed pulley and is supported and guided by the fixed pulley. Wherein, the cam disc includes a small-diameter arc section, a large-diameter arc section and a smooth section connecting the two. In the case of clockwise rotation, the small-diameter arc section drives the trowel plate mechanism to retract through the first connecting rod and the second connecting rod, the smooth section drives the entire arc-shaped frame to rotate upward through the support of the fixed pulley, and the large-diameter arc section drives the trowel plate mechanism to push forward through the first connecting rod and the second connecting rod.

2. The mold device for a large-diameter shield segment according to claim 1, characterized in that A conical scraper or a roller shaft is arranged at the bottom of the trowel plate to trowel the concrete surface in the mold.

3. The mold device for a large-diameter shield segment according to claim 1, characterized in that A high-frequency vibration mechanism is arranged on the base, and the high-frequency vibration mechanism is in contact with the bottom surface of the mold to conduct vibration.

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