CN216359270U - Trench roof pi-shaped rack leveling equipment - Google Patents

Abstract

The utility model discloses a trench roof Pi-shaped rack leveling device which comprises a press machine rack, wherein a workbench and a hydraulic cylinder are arranged on the press machine rack, the workbench comprises a middle branch table and two side branch tables which are distributed at two sides of the middle branch table at intervals, a support plate inner side limiting mechanism is installed on the middle branch table, the support plate inner side limiting mechanism comprises two limiting blocks and a limiting block telescopic adjusting mechanism, and the limiting block telescopic adjusting mechanism is connected with the two limiting blocks and can be used for driving the two limiting blocks to move along the width direction of the press machine rack. The limiting mechanism on the inner side of the support plate in the trench roof Pi-shaped rack leveling equipment can limit the travel of the lower ends of the two support plates moving to one side of the middle branch table, so that the lower ends of the two support plates are prevented from being excessively folded and inclined inwards to form an inner eight state, the two support plates after being leveled and the transverse plate have high verticality, and the leveling effect is better.

Description

Trench roof pi-shaped rack leveling equipment

Technical Field

The utility model relates to the field of leveling equipment, in particular to a pi-shaped rack leveling equipment for a trench roof.

Background

The trench roof structure is provided with a Pi-shaped frame, and the Pi-shaped frame is formed by welding and processing a transverse plate and two plates below the transverse plate. After the pi-shaped frame is machined, on one hand, due to low machining precision, the transverse plate and the two support plates below the transverse plate cannot be highly vertical, and the lower ends of the support plates may be inclined inwards or outwards; on the other hand, because of the reason that diaphragm and below two branch welding position department expend with heat and contract with cold, diaphragm and extension board welding position structure warp, often leads to pi shape frame originally smooth both ends of diaphragm can upwards perk, and the lower extreme of two branch boards of perpendicular or leanin then often finally can lean out and be "eight" font, and the structural flatness of pi shape frame is relatively poor. To obtain a regular pi frame, a leveling operation is often required after the welding of the pi frame is completed. The frame is leveled by a hydraulic press usually, the existing hydraulic press for leveling the frame generally comprises a workbench and a hydraulic cylinder positioned above the workbench, a piston rod of the hydraulic cylinder is vertically downward, a pressing block is arranged at the free end of the piston rod, when the hydraulic press works, the pi-shaped frame is arranged on the workbench, the piston rod of the hydraulic cylinder moves downward, and the pressing block presses a transverse plate of the frame downward to level the pi-shaped frame. The leveling equipment for the pi-shaped rack on the top of the trench only flattens the transverse plate of the pi-shaped rack, the support plate of the pi-shaped rack is not limited in the process of flattening the transverse plate of the pi-shaped rack, and after leveling, the support plate of the pi-shaped rack can incline inwards and is still not perpendicular to the transverse plate.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a trench roof pi-shaped rack leveling device.

The technical scheme for realizing the purpose of the utility model is as follows: the utility model provides a trench roof pi shape frame flattening equipment, includes the press frame, be equipped with workstation and pneumatic cylinder in the press frame, the workstation divide platform and interval distribution in including the centre in the middle both sides of dividing the platform both sides divide the platform, middle branch platform and two the mesa that the side divides the platform is located same height, trench roof frame include the diaphragm and weld in two planks of diaphragm bottom surface, middle branch platform and adjacent two the side divides the inter-forming two planks arrangement space, the pneumatic cylinder is located the top of workstation, the pneumatic cylinder has the piston rod, the piston rod is perpendicular down, fixed mounting has the briquetting on the lower extreme of piston rod, install the inboard stop gear of extension board on the middle branch platform, the inboard stop gear of extension board includes two stoppers and the flexible adjustment mechanism of stopper, the flexible adjustment mechanism of stopper and two the stopper is connected, The two limiting blocks can be driven to move along the width direction of the press machine frame, the two limiting blocks correspond to the two supporting plate accommodating spaces one by one, and each limiting block extends into the corresponding supporting plate accommodating space.

Furthermore, a cavity is arranged in the middle separating table, the limiting block telescopic adjusting mechanism comprises a fixed box, a trapezoidal block and a first air cylinder, the fixed box is fixedly arranged in the cavity of the middle separating table, a front empty cavity and a rear empty cavity are arranged in the fixed box, two side walls of the fixed box are horizontally provided with guide hole channels, the two guide hole channels are respectively communicated with the support plate arrangement space on the same side, the two limiting blocks are in one-to-one correspondence with the two guide hole channels, the two limiting blocks respectively movably penetrate through the corresponding guide hole channels, the trapezoidal block is positioned in the empty cavity, the two inclined edges of the trapezoidal block are horizontally arranged, the two inclined edges of the trapezoidal block are respectively provided with a horizontal guide rail, the two horizontal guide rails on the two inclined edges of the trapezoidal block are in a splayed shape, the two limiting blocks are respectively and slidably arranged on the two horizontal guide rails on the two inclined edges of the trapezoidal block, the first cylinder is provided with a first piston rod, the first piston rod is horizontal and vertical to the width direction of the press machine frame, and the first piston rod is fixedly connected with the trapezoidal block. According to the leveling equipment for the pi-shaped frame at the top of the trench, the limiting block telescopic adjusting mechanism can be two cylinders which respectively drive the two limiting blocks, or a bidirectional cylinder which simultaneously drives the two limiting blocks, or the structure. When the limiting block telescopic adjusting mechanism is in the structure, the first air cylinder acts to drive the trapezoidal block to move back and forth in the working process, and when the trapezoidal block moves back and forth, the two limiting blocks are transversely driven due to the two horizontal guide rails in the shape of the Chinese character 'ba' on the two oblique edges of the trapezoidal block, so that the two limiting blocks transversely and synchronously move along the guide pore channel, and the positions of the two limiting blocks are synchronously adjusted. Under the structure, the extending or retracting actions of the two limit blocks are synchronous, and the position adjustment of the two limit blocks is more uniform and accurate, so that the limit block telescopic adjusting mechanism is preferably of the structure.

Further, the fixing box is composed of an upper half box body and a lower half box body which are assembled together. When the fixed box is composed of the upper half box body and the lower half box body, the processing of the vacant cavity and the guide pore channel is simpler and more convenient.

Furthermore, one end of each of the two limiting blocks, which extends into the support plate accommodating space, extends outwards in the front-rear direction to form a limiting part. The limiting part is arranged, on one hand, the travel of the two limiting blocks moving to one side close to the trapezoidal block can be limited, and the two limiting blocks are prevented from being withdrawn into the guide pore channel and even being separated from the guide pore channel; on the other hand, can increase two the terminal surface of stopper, so that two the stopper is right when two supports of trench top frame carry out spacing correction, the effect face that the top touched two supports is great, and each department atress in the preceding direction of two supports is more balanced, and two supports are difficult for warping because of the atress is uneven.

Furthermore, the limiting block extends to an end face of the support plate placing space, and a top block is detachably mounted on the end face of the support plate placing space. The supporting plate is convenient to detach and replace when the supporting plate is abraded due to the fact that the supporting plate is pushed and contacted by the ejector block instead of the limiting block extending to one end face in the supporting plate accommodating space.

Furthermore, two sides of the middle separating table are respectively provided with a support plate outer side limiting mechanism, each support plate outer side limiting mechanism comprises a second cylinder and a top plate, the second cylinder is provided with a second piston rod, the second piston rod is horizontal and perpendicular to the front and back directions of the press machine frame, the second piston rod faces towards one side of the support plate accommodating space, and the top plate is fixedly installed at the end part of the second piston rod. When the two support plates of the trench roof rack to be leveled are in an inner eight state, the two support plate outer side limiting mechanisms can limit the two support plates in the two outer sides of the middle branch table, so that the two support plates are prevented from inclining outwards after being leveled. When the limiting positions of the limiting mechanisms on the outer sides of the two support plates are changed, the top plate is driven by the second cylinder to move along the width direction of the frame of the press machine to a target position.

Furthermore, every the second cylinder of the support plate outer side limiting mechanism is fixed on the press machine frame, two horizontal yielding holes are formed in the side separating table, and every second piston rod of the second cylinder of the support plate outer side limiting mechanism penetrates through the horizontal yielding hole in the same side. The second cylinder is fixed on the press machine frame more stably; when the second cylinder is fixed on the press machine frame, the side separating table is usually provided with the horizontal abdicating hole, so that the second piston rod can penetrate through the side separating table, and the top plate can extend into the support plate accommodating space.

Furthermore, a conveying table is mounted on the front wall of the middle separating table, the width of the conveying table is smaller than the distance between the two support plates, a plurality of balls are mounted on the upper surface of the conveying table, and the tops of the balls are not lower than the upper surface of the middle separating table. By the arrangement, when the to-be-leveled trench roof rack is placed on the workbench, the to-be-leveled trench roof rack can be conveyed onto the conveying table at first and then pushed onto the workbench along the conveying table, so that the to-be-leveled trench roof rack can be placed more conveniently and more conveniently in a labor-saving manner. The width of the conveying table is smaller than the distance between the two support plates, so that the trench roof rack to be leveled can be supported on the conveying table.

The Pi-shaped rack leveling device for the trench roof is usually used for leveling a trench roof rack with two upward tilted transverse plates and two outward inclined lower ends in a shape like a Chinese character 'ba', the two ends of the transverse plates are pressed downwards in the leveling process, and the lower ends of the two support plates can always move towards one side of the middle separating table and gradually retract due to the internal acting force of the transverse plates. The arrangement of the limiting mechanism on the inner side of the support plate in the trench roof Pi-shaped rack leveling equipment can limit the travel of the lower ends of the two support plates moving to one side of the middle separating table, so that the lower ends of the two support plates are prevented from being excessively folded and inclined inwards to form an inner eight state, the two support plates after being leveled and the transverse plate have high verticality, and the leveling effect is better.

Drawings

FIG. 1 is a schematic perspective view of a pi frame leveling apparatus for a trench roof according to the present invention;

FIG. 2 is a schematic structural view of the leveling device of the Pi-shaped rack on the trench roof according to the utility model;

FIG. 3 is a schematic diagram of the right view structure of the trench roof pi frame leveling device of the present invention;

FIG. 4 is a schematic cross-sectional view taken along line A-A of FIG. 2;

FIG. 5 is a schematic structural view of the intermediate separating table and the inner side limiting mechanism of the support plate in FIG. 4;

FIG. 6 is a schematic perspective view of a support plate inner side limiting mechanism of the trench roof pi-shaped rack leveling device of the present invention;

FIG. 7 is a schematic cross-sectional view taken along line B-B of FIG. 6;

FIG. 8 is a schematic cross-sectional view taken along line C-C of FIG. 6;

FIG. 9 is a schematic structural view of a trench roof frame;

FIG. 10 is a schematic perspective view of a trench roof pi frame leveling device of the present invention for leveling a trench roof frame;

FIG. 11 is a schematic structural view of the trench roof Pi-shaped rack leveling device for leveling the trench roof rack according to the utility model.

Detailed Description

The following detailed description of preferred embodiments of the trench roof pi frame leveling apparatus of the present invention will be made with reference to the accompanying drawings:

as shown in fig. 1 to 9, a pi-shaped frame leveling device for a trench roof comprises a press machine frame 10, wherein a workbench 1 and a hydraulic cylinder 2 are arranged on the press machine frame 10, the workbench 1 comprises a middle branch platform 11 and two side branch platforms 12 distributed at two sides of the middle branch platform 11 at intervals, the middle branch platform 11 and two table-boards of the side branch platforms 12 are positioned at the same height, the trench roof frame 100 comprises a transverse plate 101 and two support plates 102 welded at the bottom surface of the transverse plate 101, the middle branch platform 11 and two adjacent side branch platforms 12 form two support plate accommodating spaces 13, the hydraulic cylinder 2 is positioned above the workbench 1, the hydraulic cylinder 2 is provided with a piston rod 21, the piston rod 21 is vertically downward, a pressing block 22 is fixedly mounted on the lower end of the piston rod 21, and a support plate inner side limiting mechanism 3 is mounted on the middle branch platform 11, the support plate inner side limiting mechanism 3 comprises two limiting blocks 31 and a limiting block telescopic adjusting mechanism 32, the limiting block telescopic adjusting mechanism 32 is connected with the two limiting blocks 31 and can be used for driving the two limiting blocks 31 to move along the width direction of the press machine frame 10, the two limiting blocks 31 correspond to the two support plate accommodating spaces 13 one by one, and each limiting block 31 extends into the corresponding support plate accommodating space 13.

According to the pi-shaped frame leveling device for the trench roof, the widths of the two support plate accommodating spaces 13 and the middle branch table 11 are limited by the fact that after the trench roof frame 100 to be leveled is arranged on the workbench 1, the two support plates 102 of the trench roof frame 100 to be leveled can be respectively positioned in the two support plate accommodating spaces 13.

When the pi-shaped rack leveling device for the trench roof is in operation, as shown in fig. 10 and 11, the trench roof rack 100 to be leveled is placed on the workbench 1, specifically, the transverse plate 101 of the trench roof rack 100 to be leveled is placed on the middle sub-platform 11 and the two side sub-platforms 12, and the two support plates 102 of the trench roof rack 100 to be leveled are respectively located in the two support plate accommodating spaces 13. After the to-be-leveled roof rack 100 is placed on the workbench 1, the hydraulic cylinder 2 acts to drive the pressing block 22 to press downwards, and the to-be-leveled roof rack 100 on the workbench 1 is leveled. In the leveling process, the support plate inner side limiting mechanism 3 limits the travel of the two support plates 102 moving to the side close to the intermediate branch table 11.

The leveling device for the pi-shaped frame of the trench roof is usually used for leveling the trench roof frame 100 with two ends of a transverse plate 101 tilted upwards and the lower ends of two support plates 102 tilted outwards to form a shape like a Chinese character 'ba', wherein in the leveling process, the two ends of the transverse plate 101 are pressed downwards, and the lower ends of the two support plates 102 always move towards one side of the middle branch table 11 and are gradually folded due to the internal acting force of the transverse plate 101. The arrangement of the limiting mechanism 3 on the inner side of the support plate in the trench roof pi-shaped rack leveling equipment can limit the travel of the lower ends of the two support plates 102 moving to one side of the middle branch table 11, prevent the lower ends of the two support plates 102 from being excessively folded, and enable the lower ends of the two support plates 102 to be inclined inwards in an eight-inside state, so that the two support plates 102 after being leveled and the transverse plate 101 have high verticality, and the leveling effect is better.

According to the trench roof pi-shaped rack leveling equipment, when the support plate inner side limiting mechanism 3 limits the travel of the lower ends of the two support plates 102 moving to one side of the middle branch table 11, specifically, the two limiting blocks 31 in the support plate inner side limiting mechanism 3 are positioned on the moving path or the extension line of the moving path of the lower ends of the two support plates 102 moving to one side of the middle branch table 11, and the movement of the lower ends of the two support plates 102 moving to one side of the middle branch table 11 is blocked, so that the two support plates 102 can move to the outer sides of the two limiting blocks 31 at most and can not be further drawn close to one side of the middle branch table 11.

According to the trench roof pi-shaped rack leveling device, the two limiting blocks 31 are arranged to ensure that the two support plates 102 are perpendicular to the transverse plate 101 after leveling, so that the positions of the two limiting blocks 31 are usually determined by the distance between the two support plates 102. When the trench roof frame 100 with different distances between the two support plates 102 is straightened, the positions of the two limit blocks 31 need to be adjusted; the positions of the two limit blocks 31 are adjusted by the limit block telescopic adjusting mechanisms 32, specifically, the limit block telescopic adjusting mechanisms 32 drive the two limit blocks 31 to move along the width direction of the press machine frame 10, so that the two limit blocks 31 are located at the target positions.

The channel top pi-shaped rack leveling device of the utility model, preferably, as shown in fig. 4 to 8, a cavity 110 is provided in the middle branch table 11, the stopper telescopic adjustment mechanism 32 includes a fixed box 321, a trapezoidal block 322 and a first cylinder 323, the fixed box 321 is fixedly installed in the cavity 110 of the middle branch table 11, a hollow cavity 3211 which is through from front to back is provided in the fixed box 321, guide hole passages 3212 are horizontally provided on both side walls of the fixed box 321, the two guide hole passages 3212 are respectively through the support plate installation space 13 on the same side, the two stoppers 31 are in one-to-one correspondence with the two guide hole passages 3212, the two stoppers 31 are respectively movably passed through the corresponding guide hole passages 3212, the trapezoidal block 322 is located in the hollow cavity 3211, two inclined edges of the trapezoidal block 322 are horizontally arranged, two inclined edges of the trapezoidal block 322 are respectively provided with a horizontal guide rail 3221, the two horizontal guide rails 3221 on the two inclined edges of the trapezoidal block 322 are in a splayed shape, the two limiting blocks 31 are respectively slidably mounted on the two horizontal guide rails 3221 on the two inclined edges of the trapezoidal block 322, the first cylinder 323 is provided with a first piston rod 3231, the first piston rod 3231 is horizontal and perpendicular to the width direction of the press machine frame 10, and the first piston rod 3231 is fixedly connected with the trapezoidal block 322.

In the trench roof pi-shaped frame leveling device, the limiting block telescopic adjusting mechanism 32 can be two cylinders which respectively drive the two limiting blocks 31, or a bidirectional cylinder which simultaneously drives the two limiting blocks 31, or the structure. When the position of the two limit blocks 31 needs to be adjusted, the first cylinder 323 acts to drive the trapezoidal block 322 to move back and forth, and when the trapezoidal block 322 moves back and forth, the two limit blocks 31 are transversely driven due to the two horizontal guide rails 3221 in the shape of the Chinese character 'ba' on the two oblique sides of the trapezoidal block 322, so that the two limit blocks 31 transversely and synchronously move along the guide hole 3212, and the positions of the two limit blocks 31 are further synchronously adjusted. Under this structure, the action that two stopper 31 stretch out or withdraw is synchronous, and two stopper 31 position control are more unified, more accurate.

According to the trench roof pi-shaped rack leveling device, the first piston rod 3231 can be directly and fixedly connected with the trapezoidal block 322; a first piston rod extension rod 3232 may be disposed on the first piston rod 3231, and the first piston rod 3231 is fixedly connected to the trapezoidal block 322 through the first piston rod extension rod 3232, as shown in fig. 5 and 8.

In order to enable the two guide hole channels 3212 to be respectively communicated with the support plate accommodating space 13 on the same side, through holes 113 are usually formed in two side walls of the middle branch table 11, wherein the through holes 113 can be connected between the guide hole channels 3212 and the support plate accommodating space 13, so that the guide hole channels 3212 are communicated with the support plate accommodating space 13 on the same side; the through hole 113 may also be located outside the guide hole 3212, that is, the guide hole 3212 may pass through the through hole 113 directly to the plate accommodating space 13, as shown in fig. 5.

In the trench roof pi-shaped rack leveling device, the fixing box 321 can be an integral structure or a split structure. Preferably, as shown in fig. 6 to 8, the fixing box 321 is composed of an upper box half 3210 and a lower box half 3210' assembled together. When the fixing box 321 is composed of an upper box body 3210 and a lower box body 3210', the processing of the vacant cavity 3211 and the guide hole 3212 is simpler and more convenient.

In the pi-shaped frame leveling device for a trench roof of the present invention, preferably, as shown in fig. 4 to 8, one end of each of the two limiting blocks 31 extending into the support plate accommodating space 13 extends outward in the front-rear direction to form a limiting portion 311. The limiting portion 311 is arranged to limit the moving stroke of the two limiting blocks 31 to a side close to the trapezoidal block 322, so as to prevent the two limiting blocks 31 from being retracted into the guide hole 3212 and even being separated from the guide hole 3212; on the other hand, the end surfaces of the two stoppers 31 can be enlarged, so that when the two stoppers 31 perform the limiting correction on the two support plates 102 of the trench roof frame 100, the acting surface for contacting the two support plates 102 is larger, the stress at each position in the front direction of the two support plates 102 is more balanced, and the two support plates 102 are not easily deformed due to unbalanced stress.

In the trench roof pi-shaped rack leveling device of the present invention, preferably, as shown in fig. 4 to 8, a top block 312 is detachably mounted on an end surface of the limiting block 31 extending into the support plate accommodating space 13. The arrangement is that the top block 312 is abutted against the support plate 102 in the limiting process, but an end face of the limiting block 31 extending into the support plate accommodating space 13 is directly abutted against the support plate 102, so that the top block 312 is convenient to detach and replace when the support plate 102 is abraded.

In the pi-shaped frame leveling device for a trench roof according to the present invention, as shown in fig. 4, two sides of the middle branch table 11 are respectively provided with a support plate outer limiting mechanism 4, each support plate outer limiting mechanism 4 includes a second cylinder 41 and a top plate 42, the second cylinder 41 has a second piston rod 411, the second piston rod 411 is horizontal and perpendicular to the front-back direction of the press frame 10, the second piston rod 411 faces one side of the two support plate accommodating spaces 13, and the top plate 42 is fixedly mounted at an end of the second piston rod 411. When the two support plates 102 of the trench roof rack 100 to be leveled are in the inner eight state, the two support plate outer side limiting mechanisms 4 can limit the two support plates 102 at the two outer sides of the middle branch table 11, so as to prevent the two support plates 102 from inclining outwards after being leveled. When the limiting positions of the two support plate outer limiting mechanisms 4 are changed, the top plate 42 is driven by the second air cylinder 41 to move along the width direction of the press machine frame 10 to a target position.

According to the pi-shaped rack leveling device for the trench roof, the top plate 42 can be directly and fixedly arranged at the end part of the second piston rod 411; a top plate fixing rod 421 may also axially extend from the middle of the top plate 42, and the top plate fixing rod 421 is fixedly installed at the end of the second piston rod 411, as shown in fig. 4.

In the pi-shaped frame leveling device for a trench roof according to the present invention, preferably, the second cylinder 41 of each support plate outer limiting mechanism 4 is fixed on the press machine frame 10, the two side sub-tables 12 are both provided with a horizontal abdicating hole 121, and the second piston rod 411 of the second cylinder 41 of each support plate outer limiting mechanism 4 passes through the horizontal abdicating hole 121 on the same side, as shown in fig. 4. The second air cylinder 41 is fixed on the press machine frame 10 more stably; when the second cylinder 41 is fixed to the press frame 10, the side separating table 12 is usually provided with the horizontal abdicating hole 121, so that the second piston rod 411 can pass through the side separating table 12 through the horizontal abdicating hole 121, and the top plate 42 can extend into the supporting plate accommodating space 13.

According to the pi-shaped rack leveling device for the trench roof, the horizontal abdicating hole 121 on the side branch table 12 can at least allow the second piston rod 411 to pass through, and even allow the top plate 42 to pass through.

In the trench top pi-shaped rack leveling device of the present invention, preferably, a conveying table 111 is installed on the front wall of the middle branch table 11, the width of the conveying table 111 is smaller than the distance between the two support plates 102, a plurality of balls 112 are installed on the upper surface of the conveying table 111, and the tops of the balls 112 are not lower than the upper surface of the middle branch table 11. By the arrangement, when the trench roof rack 100 to be leveled is placed on the workbench 1, the trench roof rack 100 to be leveled can be conveyed onto the conveying table 111 conveniently, and then the trench roof rack 100 to be leveled is pushed onto the workbench 1 along the conveying table 111, so that the trench roof rack 100 to be leveled can be placed more conveniently and more conveniently in a labor-saving manner. The width of the conveying table 111 is smaller than the distance between the two support plates 102, so that the trench roof frame 100 to be leveled can be supported on the conveying table 111.

For those skilled in the art to which the utility model pertains, several simple deductions or substitutions can be made without departing from the spirit of the utility model, and all should be considered as belonging to the protection scope of the utility model.

Claims (8)

1. The utility model provides a trench roof pi shape frame flattening equipment, includes the press frame, be equipped with workstation and pneumatic cylinder in the press frame, its characterized in that: the worktable comprises a middle separating table and two side separating tables which are distributed at two sides of the middle separating table at intervals, the middle separating table and two table tops of the side separating tables are positioned at the same height, the trench top frame comprises a transverse plate and two support plates welded on the bottom surface of the transverse plate, the middle separating table and two adjacent side separating tables form two support plate placing spaces, the hydraulic cylinder is positioned above the worktable and is provided with a piston rod, the piston rod is vertically downward, a pressing block is fixedly arranged on the lower end of the piston rod, an inner side limiting mechanism of the support plate is arranged on the middle separating table and comprises two limiting blocks and a limiting block telescopic adjusting mechanism, the limiting block telescopic adjusting mechanism is connected with the two limiting blocks and can be used for driving the two limiting blocks to move along the width direction of the press machine frame, the two limiting blocks correspond to the two supporting plate accommodating spaces one by one, and each limiting block extends into the corresponding supporting plate accommodating space.

2. The trench roof pi frame leveling apparatus as recited in claim 1, wherein: the middle separating table is internally provided with a cavity, the limiting block telescopic adjusting mechanism comprises a fixed box, a trapezoidal block and a first air cylinder, the fixed box is fixedly arranged in the cavity of the middle separating table, a hollow cavity which is communicated from front to back is arranged in the fixed box, two side walls of the fixed box are horizontally provided with guide hole channels, the two guide hole channels are respectively communicated with the support plate arrangement space at the same side, the two limiting blocks are in one-to-one correspondence with the two guide hole channels, the two limiting blocks respectively movably penetrate through the corresponding guide hole channels, the trapezoidal block is positioned in the hollow cavity, the two inclined edges of the trapezoidal block are horizontally arranged, two horizontal guide rails are respectively arranged on the two inclined edges of the trapezoidal block, the two horizontal guide rails on the two inclined edges of the trapezoidal block are in a splayed shape, the two limiting blocks are respectively arranged on the two horizontal guide rails on the two inclined edges of the trapezoidal block in a sliding manner, the first cylinder is provided with a first piston rod, the first piston rod is horizontal and vertical to the width direction of the press machine frame, and the first piston rod is fixedly connected with the trapezoidal block.

3. The trench roof pi frame leveling apparatus as recited in claim 2, wherein: the fixed box is composed of an upper half box body and a lower half box body which are assembled together.

4. The trench roof pi frame leveling apparatus as recited in claim 1, wherein: and one end of each limiting block extending into the support plate accommodating space extends outwards in the front-back direction to form a limiting part.

5. The trench roof pi frame leveling apparatus as recited in claim 1, wherein: the limiting block extends to one end face in the support plate placing space, and a top block is detachably mounted on the end face.

6. The trench roof pi frame leveling apparatus as recited in claim 1, wherein: the two sides of the middle separating table are respectively provided with a support plate outer side limiting mechanism, each support plate outer side limiting mechanism comprises a second cylinder and a top plate, the second cylinder is provided with a second piston rod, the second piston rod is horizontal and perpendicular to the front and back directions of the press machine frame, the second piston rod faces towards one side of the support plate accommodating space, and the top plate is fixedly installed at the end part of the second piston rod.

7. The trench roof pi frame leveling apparatus according to claim 6, wherein: the second cylinder of each support plate outer side limiting mechanism is fixed on the press machine frame, horizontal yielding holes are formed in the side separating tables, and the second piston rod of the second cylinder of each support plate outer side limiting mechanism penetrates through the horizontal yielding holes in the same side.

8. The trench roof pi frame leveling apparatus as recited in claim 1, wherein: the front wall of the middle separating table is provided with a conveying table, the width of the conveying table is smaller than the distance between the two support plates, the upper surface of the conveying table is provided with a plurality of balls, and the tops of the balls are not lower than the upper surface of the middle separating table.

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