Mounting and positioning jig frame for pipe gallery steel reinforcement framework

Abstract

The invention discloses a mounting and positioning jig frame for a pipe gallery steel reinforcement framework. The mounting and positioning jig frame comprises a base, a positioning frame and a lateral limiting part. The base comprises a transverse comb plate and a first longitudinal comb plate which are orthogonally arranged and are respectively used for placing the distribution ribs and the annular ribs at the bottom; the positioning frame comprises a lateral positioning frame and a top positioning frame which are oppositely arranged on the two sides of the base, and the positioning frame is arranged in the length direction of the steel reinforcement framework at intervals to define a mounting cavity with the base. The positioning frame comprises a main rod, an auxiliary rod, a plurality of hooking parts and a first locking part. One end of the hooking part extends into the mounting cavity to form a bending part for hooking the distribution rib, and the other end of the hooking part is hinged with the auxiliary rod. Hinge points of any adjacent hooking parts form vertexes of a parallelogram, so that the auxiliary rod can drive all the hooking parts to swing synchronously. The first locking part is used for locking the auxiliary rod. The lateral limiting part comprises a second longitudinal comb plate which is movably connected to the lateral positioning frame and used for clamping and limiting the ring rib, and the lateral limiting part is locked at the working position through a second locking part.

Description

Technical Field

[0001] This invention relates to the field of reinforced concrete construction technology for pipe racks, and in particular to an installation and positioning jig for reinforced concrete skeletons in pipe racks. Background Technology

[0002] With the rapid development of urban underground utility tunnel construction, prefabricated assembled utility tunnels have been widely used due to their advantages such as stable quality, high construction efficiency, and minimal environmental impact. In the industrialized production of prefabricated utility tunnels, the forming of the steel reinforcement cage is the core process, and its precision and efficiency directly affect product quality and production line cycle time.

[0003] Currently, the installation and positioning of reinforcing bars in this process largely relies on manual labor, which has several technical drawbacks. First, workers depend entirely on experience and repeated measurements to place and connect numerous longitudinal reinforcing bars one by one to the ring bars. This is not only inefficient, but also makes it difficult to guarantee the positioning accuracy of the reinforcing bars and the overall dimensional accuracy of the reinforcing bar cage, easily leading to difficulties in subsequent demolding and substandard concrete cover thickness. Second, workers engage in high-intensity, repetitive bending work for extended periods, resulting in high labor intensity and safety risks such as scratches and punctures to the reinforcing bars. Furthermore, after the reinforcing bar cage is fabricated, construction workers often need to disassemble the supports one by one for demolding, which is not only time-consuming and labor-intensive, but also highly susceptible to deformation of the reinforcing bars during demolding, affecting product quality.

[0004] Therefore, there is an urgent need for a special jig that can quickly and accurately position and fix the reinforcing bars, and can efficiently and non-destructively separate them from the reinforcing bar skeleton after forming, so as to improve the overall efficiency of precast pipe gallery production. Summary of the Invention

[0005] The main technical problem to be solved by the present invention is to provide an installation positioning jig for the steel reinforcement cage of the pipe gallery, so as to improve the overall efficiency of the fabrication and installation of the steel reinforcement cage of the pipe gallery.

[0006] To solve the above-mentioned technical problems, the present invention provides an installation and positioning frame for a pipe gallery steel reinforcement cage, including a base, several positioning frames and a lateral limiting part;

[0007] The base includes a transverse comb plate and a first longitudinal comb plate; a plurality of transverse comb plates and a plurality of first longitudinal comb plates are orthogonally arranged in the horizontal direction; the top of the transverse comb plate is provided with a plurality of first slots at intervals along the length direction for placing the distribution bars at the bottom of the steel reinforcement cage; the top of the first longitudinal comb plate is provided with a plurality of second slots at intervals along the length direction for placing the ring bars of the steel reinforcement cage.

[0008] The positioning frame includes several side positioning frames and a top positioning frame; at least two sets of the side positioning frames are arranged laterally opposite to each other on the top sides of the base, and the top positioning frame is movably connected to the top of at least one set of side positioning frames; several sets of side positioning frames and top positioning frames are spaced apart along the length of the steel reinforcement frame to enclose a top-openable mounting cavity with the base.

[0009] The positioning frame includes a main rod, a secondary rod, several hooks, and a first locking part. The main rod is vertically connected to the top of the base. The hooks are hinged to the main rod at point A, and one end of each hook extends into the mounting cavity and has a bend for hooking the lateral or top distribution bars of the reinforcing steel frame. The end of the hook away from the mounting cavity is hinged to the secondary rod at point B. Several hooks are spaced apart along the length of the main rod and the crossbar, and any two adjacent sets of points A and B are constructed as the four vertices of a parallelogram, so that the secondary rod drives all the hooks connected to it to swing at the same angular velocity. The first locking part is used to lock or unlock the relative translational degree of freedom of the secondary rod with respect to the main rod.

[0010] The lateral limiting part includes a second longitudinal comb plate and a second locking part; at least two rows of the second longitudinal comb plates are respectively disposed on both sides of the reinforcing steel frame and are movably connected to the lateral positioning frame in the longitudinal direction; the second longitudinal comb plate is provided with a plurality of third slots at intervals along the length direction on the side facing the mounting cavity, so as to limit the engagement with the ring reinforcement of the reinforcing steel frame in the longitudinal direction at the first position; the second locking part is used to lock or unlock the second longitudinal comb plate in the first position.

[0011] In a preferred embodiment, the mounting and positioning frame further includes a top limiting part; the top limiting part includes a third longitudinal comb plate; the third longitudinal comb plate is longitudinally connected to the top positioning frame; the second longitudinal comb plate has a plurality of fourth slots spaced along the length direction on the side facing the mounting cavity, so as to limit the engagement with the ring bars of the steel reinforcement skeleton along the longitudinal direction.

[0012] In a preferred embodiment, the positioning frame further includes an operating lever; the operating lever is connected to any one of the following: the auxiliary lever; or any hook portion at one end away from the mounting cavity.

[0013] In a preferred embodiment, the first locking part includes a first base with a first positioning hole and a first positioning pin; either the main rod or the auxiliary rod is connected to the first base, and the other is provided with a second positioning hole so as to engage with the first base pin through the first positioning pin.

[0014] In a preferred embodiment, the second locking part includes a second base with a third positioning hole and a second positioning pin; the second base is hinged to the main rod at point C; the main rod of the lateral positioning frame is configured with a fourth positioning hole to engage with the second base pin through the second positioning pin; the second longitudinal comb plate is connected to the side of the second base away from the third positioning hole.

[0015] In a preferred embodiment, the second locking part further includes a force rod; the force rod is connected to the second base or the second longitudinal comb plate.

[0016] In a preferred embodiment, the hook portion is shaped like a "7", including a corner portion and a first sub-rod and a second sub-rod extending from the corner portion at an angle; the corner portion is hinged to the main rod at point A; the end of the first sub-rod away from the corner portion is hinged to the auxiliary rod at point B; the end of the second sub-rod away from the corner portion is provided with the bent portion.

[0017] In a preferred embodiment, the top positioning frame is rotatably connected to the top of the side positioning frame on either side.

[0018] In a preferred embodiment, the main rod of the positioning frame adopts a telescopic structure.

[0019] This invention also provides a method for installing and positioning a steel reinforcement cage for a utility tunnel, which uses the installation and positioning jig for the steel reinforcement cage described above; the method includes the following steps: Step 1: Assemble the mounting and positioning frame and open the top of the mounting cavity;

[0020] Step 2: Place the reinforcing bars. This step includes:

[0021] Step 21: Place the distribution bars at the bottom of the steel reinforcement cage longitudinally into the first slot;

[0022] Step 22: Place the lateral distribution bars of the steel reinforcement cage longitudinally within the bend of the lateral positioning frame;

[0023] Step 23: Install the ring bars of the steel reinforcement cage laterally into the second slot; lock the second longitudinal comb plate in the first position through the second locking part so that the third slot can laterally lock the ring bars;

[0024] Step 24: Move the top positioning frame to the top of the reinforcing bar cage to close the top of the mounting cavity; then place the distribution bars at the top of the reinforcing bar cage longitudinally within the bend of the top positioning frame;

[0025] When the distribution reinforcement to be installed is located outside the ring reinforcement, step 2 is performed in sequence as steps 21, 22, 23, and 24; when the distribution reinforcement to be installed is located inside the ring reinforcement, step 2 is performed first as step 23, followed by steps 21, 22, and 24 in no particular order.

[0026] Step 3: Move the auxiliary rods of the lateral positioning frame and the top positioning frame to drive the hook part to swing to the working position, so that the distribution ribs placed on it abut against the ring ribs; then lock the relative translational degree of freedom of the auxiliary rods with respect to the main rods by the first locking member;

[0027] Step 4: Connect the distribution bars to the ring bars;

[0028] Step 5: Unlock the first locking part and the second locking part, and move the top positioning frame to open the top of the mounting cavity, so that the fabricated steel reinforcement frame is detached from the mounting positioning jig.

[0029] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0030] The installation and positioning jig for the rebar cage of the utility tunnel provided by this invention has the following technical advantages: First, the positioning jig adopts a synchronous linkage structure based on the parallelogram principle, realizing the synchronous driving and positioning of all distributed bars, transforming the traditional tedious bar-by-bar positioning into a highly efficient "one-click" mechanical operation, greatly improving work efficiency and ensuring positioning accuracy. Second, the first and second locking components adopt a reversible pin-type rigid locking and quick-release structure, providing stable support during the rebar connection stage to ensure construction quality, and enabling rapid and non-destructive separation during the demolding stage, balancing forming quality and jig turnover efficiency. Furthermore, the integrated structure of the installation and positioning jig allows the positioning of the ring bars and distributed bars to be completed in one clamping, ensuring the overall forming accuracy of the rebar cage, making on-site construction orderly, and laying a structural foundation for the automation upgrade of subsequent production processes. The installation and positioning method provided by this invention, based on the installation and positioning jig, leverages its structural advantages to achieve high efficiency, high quality, and low labor intensity. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the installation and positioning frame when the bottom distribution ribs are placed in an embodiment of the present invention;

[0032] Figure 2 This is a schematic diagram of the installation and positioning frame structure when the inner ring reinforcement, lateral and bottom distribution reinforcement are placed in an embodiment of the present invention;

[0033] Figure 3 This is a schematic diagram of the installation and positioning jig frame when the directional distributed ribs are pressed against the surface of the inner ring ribs in an embodiment of the present invention;

[0034] Figure 4 This is a schematic diagram of the installation positioning jig after the connection between the frame distribution ribs and the inner ring ribs is completed in an embodiment of the present invention;

[0035] Figure 5 This is a schematic diagram of the installation and positioning jig frame when the directional distributed ribs are pressed against the surface of the outer ring ribs in an embodiment of the present invention;

[0036] Figure 6 This is a schematic diagram of the operation of the second locking member in an embodiment of the present invention.

[0037] The markings in the diagram are as follows: 1-base, 11-transverse comb plate, 111-first slot, 12-first longitudinal comb plate, 2-positioning frame, 201-lateral positioning frame, 202-top positioning frame, 21-main rod, 211-fourth positioning hole, 22-sub-rod, 221-second positioning hole, 23-hook part, 231-bending part, 232-corner part, 233-first sub-rod, 234-second sub-rod, 24-first locking part. 241-First base, 2411-First positioning hole, 242-First positioning pin, 25-Operating rod, 3-Lateral limiting part, 31-Second longitudinal comb plate, 32-Second locking part, 321-Second base, 3211-Third positioning hole, 322-Second positioning pin, 323-Force rod, 4-Top limiting part, 41-Third longitudinal comb plate, 5-Mounting cavity, 6-Reinforcing steel skeleton, 61-Distribution reinforcement, 62-Ring reinforcement. Detailed Implementation

[0038] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0039] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0040] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed", "equipped", "sleeved / connected", "connected", etc., should be interpreted broadly. For example, "connection" can be a wall-mounted connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0041] like Figures 1-6 As shown in the figure, this embodiment of the invention provides an installation and positioning jig for a pipe gallery reinforcement cage, aiming to solve the problems of low efficiency, poor precision, high labor intensity, and difficulty in demolding existing reinforcement cage manufacturing processes. The structure of the installation and positioning jig will be described in detail below with reference to specific figures.

[0042] The installation positioning frame includes a base 1, several sets of positioning frames 2, and lateral limiting parts 3. The base 1 includes a transverse comb plate 11 and a first longitudinal comb plate 12, with the transverse comb plates 11 and the first longitudinal comb plates 12 arranged orthogonally in the horizontal direction. The top of the transverse comb plate 11 has several first slots 111 spaced along its length for placing the distribution bars 61 at the bottom of the reinforcing steel cage 6. The top of the first longitudinal comb plate 12 has several second slots 121 spaced along its length for placing the ring bars 62 of the reinforcing steel cage 6. It is easy to understand that the specific slotting positions of the first slots 111 and the second slots 121 match the design drawings of the pipe gallery reinforcing steel cage 6.

[0043] Overall, the positioning frame 2 comprises a lateral positioning frame 201 and a top positioning frame 202. At least two sets of the lateral positioning frames 201 are arranged laterally opposite to each other on the top sides of the base 1, while the top positioning frame 202 is movably connected to the top of at least one set of lateral positioning frames 201. Several sets of lateral positioning frames 201 and top positioning frames 202 are spaced apart along the length of the reinforcing steel frame 6 to enclose a top-openable mounting cavity 5 with the base 1, within which the reinforcing steel frame 6 is assembled. Preferably, the top positioning frame 202 is hinged to the top of the lateral positioning frame 201 for easy opening and closing.

[0044] As the core component of the mounting and positioning frame, the positioning frame 2 includes a main rod 21, a secondary rod 22, and several hooks 23. The main rod 21 is vertically connected to the top of the base 1 as a support member. Preferably, to accommodate steel reinforcement cages 6 of different sizes, the main rod 21 employs a telescopic structure for height adjustment. Preferably, the hooks 23 are constructed in a "7" shape, including a corner section 232 and a first sub-rod 233 and a second sub-rod 234 extending from the corner section 232 at an angle. The corner section 232 is hinged to the main rod 21 at point A, the end of the first sub-rod 233 away from the corner section 232 is hinged to the secondary rod 22 at point B, and the end of the second sub-rod 234 away from the corner section 232 is provided with a bent portion 231 for hooking the lateral or top distribution bars 61 of the steel reinforcement cage 6. All hooks 23 are arranged along the main rod 21, and any two adjacent sets of hinge points A and B are constructed to form the vertices of a parallelogram. Several hooks 23 are spaced apart along the length of the main rod 21 and the crossbar, and any two adjacent sets of points A and B are constructed to form the four vertices of a parallelogram. Based on the principle of the invariance of the parallelogram mechanism, when the operator moves the auxiliary rod 22 or one of the hooks 23, all the hooks 23 on the positioning frame 2 can be driven to swing synchronously around their respective hinge points A at the same angular velocity. This structure transforms the cumbersome operation of individually positioning each distribution rib 61 in the traditional process into a "one-click" synchronous positioning and release, greatly improving work efficiency and positioning accuracy. For ease of operation, the positioning frame 2 also includes an operating rod 25, which can be directly connected to the auxiliary rod 22 or connected to the end of any hook 23 away from the mounting cavity 5.

[0045] When the hook 23 moves the lateral and top distribution ribs 61 to a position close to the surface of the ring rib 62, the hook 23 needs to be locked to provide the stability required for welding or binding. For this purpose, the positioning frame 2 also includes a first locking part 24 for locking or unlocking the relative translational freedom of the auxiliary rod 22 with respect to the main rod 21. Preferably, the first locking part 24 includes a first base 241 with a first positioning hole 2411 and a first positioning pin 242. Either the main rod 21 or the auxiliary rod 22 is connected to the first base 241, while the other has a second positioning hole 221 for engagement with the first base 241 via the first positioning pin 242. It is easy to understand that the first positioning hole 2411 and the second positioning hole 221 are configured such that when the auxiliary rod 22 moves to the working position so that the distribution rib 61 abuts against the surface of the ring rib 62, the first positioning hole 2411 aligns with the second positioning hole 221 to allow the first positioning pin 242 to be inserted and locked. Once the distribution rib 61 and the ring rib 62 are connected, pulling out the first positioning pin 242 unlocks the relative translational degree of freedom of the auxiliary rod 22 with respect to the main rod 21, restoring the linkage function. Preferably, in Figure 2In the specific application example shown, the first base 241 is connected to the main rod 21, and the second positioning hole 221 is provided on the auxiliary rod 22.

[0046] The lateral limiting part 3 is used to precisely position the ring reinforcement 62 from both sides, and includes a second longitudinal comb plate 31 and a second locking part 32. At least two rows of the second longitudinal comb plates 31 are respectively disposed on both sides of the reinforcing steel skeleton 6 and are movably connected to the lateral positioning frame 201 along the longitudinal direction. The second longitudinal comb plates 31 have a plurality of third slots 311 spaced along the length direction on the side facing the mounting cavity 5. When the second longitudinal comb plates 31 are pushed to the first position, these third slots 311 are laterally engaged with the ring reinforcement 62 of the reinforcing steel skeleton 6, and are longitudinally limited to cooperate with the ring reinforcement 62. The third slots 311 cooperate with the second slots 121 on the base 1 to achieve multi-directional and stable constraint on the ring reinforcement 62. The second locking part 32 is used to lock or unlock the second longitudinal comb plates 31 in the first position. Preferably, the second locking part 32 includes a second base 321 with a third positioning hole 3211 and a second positioning pin 322. The second base 321 is hinged to the main rod 21 at point C. The main rod 21 of the lateral positioning frame 201 has a fourth positioning hole 211 for engagement with the second base 321 via the second positioning pin 322. The side of the second base 321 away from the third positioning hole 3211 is connected to the second longitudinal comb plate 31. When the second longitudinal comb plate 31 is in the first position, the second base 321 rotates around point C to a specific angle, aligning the third positioning hole 3211 with the fourth clearance hole, allowing the second positioning pin 322 to be inserted and locked. Preferably, the second locking part 32 further includes a force rod 323, which is connected to the second base 321 or the second longitudinal comb plate 31. When the reinforcing steel skeleton 6 is demolded, the second positioning pin 322 is pulled out, and then the force rod 323 is pushed, causing the entire second longitudinal comb plate 31 to rotate around the hinge point C, thereby quickly separating it from the reinforcing steel skeleton 6.

[0047] To further improve the positioning of the ring reinforcement 62, the installation positioning jig also includes a top limiting part 4. The top limiting part 4 includes a third longitudinal comb plate 41. The third longitudinal comb plate 41 is longitudinally connected to the top positioning frame 202. The second longitudinal comb plate 31 has a plurality of fourth slots 411 spaced along its length on the side facing the installation cavity 5, so as to limit and cooperate with the ring reinforcement 62 of the steel reinforcement skeleton 6 in the longitudinal direction.

[0048] The installation positioning jig precisely positions the ring reinforcement 62 and the bottom distribution reinforcement 61 through the comb plate orthogonally arranged on the base 1. The lateral limiting part 3, which can be quickly locked and unlocked, stabilizes the lateral position of the ring reinforcement 62. The positioning frame 2, which can be synchronously linked, efficiently positions the lateral and top distribution reinforcement 61, forming an integrated composite jig for the ring reinforcement 62 and the distribution reinforcement 61, realizing one-time high-precision positioning of the entire steel reinforcement skeleton 6.

[0049] This invention also provides a method for installing and positioning the steel reinforcement cage of a pipe gallery, which uses the installation and positioning jig described above. The method includes the following steps:

[0050] Step 1: Assemble and place the mounting and positioning frame, and open the top of the mounting cavity 5.

[0051] Step 2: Initial placement of the reinforcing bars. This step includes:

[0052] Step 21: Insert the distribution bars 61 at the bottom of the steel reinforcement cage 6 longitudinally into the first slot 111;

[0053] Step 22: Place the lateral distribution bars 61 of the steel reinforcement cage 6 longitudinally within the bend 231 of the lateral positioning frame 201;

[0054] Step 23: Install the ring reinforcement 62 of the steel reinforcement cage 6 in the second slot 121 in the transverse direction; lock the second longitudinal comb plate 31 in the first position by the second locking part 32 so that the third slot 311 can laterally lock the ring reinforcement 62;

[0055] Step 24: Move the top positioning frame 202 to the top of the reinforcing bar cage 6 to close the top of the mounting cavity 5; then, place the distribution bars 61 at the top of the reinforcing bar cage 6 longitudinally within the bend 231 of the top positioning frame 202. Step 2 needs to be performed in one of two orders according to the relative positional relationship between the distribution bars 61 and the ring bars 62 in the design drawing: when the distribution bars 61 to be installed are located outside the ring bars 62, Step 2 is performed in the order of Step 21, Step 22, Step 23, and Step 24; when the distribution bars 61 to be installed are located inside the ring bars 62, Step 2 is performed first in Step 23, followed by Step 21, Step 22, and Step 24 in any order.

[0056] Step 3: Move the secondary rods 22 of the lateral positioning frame 201 and the top positioning frame 202 to drive the hook part 23 to swing to the working position, so that the distribution rib 61 placed on it abuts the ring rib 62; then lock the relative translational degree of freedom of the secondary rod 22 with respect to the main rod 21 by the first locking member.

[0057] Step 4: Connect the distribution reinforcement 61 and the ring reinforcement 62.

[0058] Step 5: Unlock the first locking part 24 and the second locking part 32, and move the top positioning frame 202 to open the top of the mounting cavity 5, so that the manufactured steel reinforcement skeleton 6 can be removed from the mounting positioning frame, and demolding is completed.

[0059] In summary, the installation and positioning jig for the rebar cage of the pipe gallery provided in this embodiment of the invention has the following technical advantages: First, the positioning frame 2 adopts a synchronous linkage structure based on the parallelogram principle, realizing the synchronous driving and positioning of all distributed reinforcement bars 61, transforming the traditional tedious individual positioning into an efficient "one-click" mechanical operation, greatly improving work efficiency and ensuring positioning accuracy. Second, the first locking member and the second locking member adopt a reversible pin-type rigid locking and quick-release structure, providing stable support during the rebar connection stage to ensure construction quality, and enabling rapid and non-destructive separation during the demolding stage, balancing forming quality and jig turnover efficiency. Furthermore, the integrated structure of the installation and positioning jig allows the positioning of the ring reinforcement bars 62 and distributed reinforcement bars 61 to be completed in one clamping, ensuring the overall forming accuracy of the rebar cage 6, making on-site construction orderly, and laying a structural foundation for the automation upgrade of subsequent production processes. The installation and positioning method provided in this embodiment of the invention, based on the installation and positioning jig, leverages its structural advantages to achieve high efficiency, high quality, and low labor intensity.

[0060] The above description is merely a preferred embodiment of the present invention and is not intended to limit the patent scope of the present invention. Any technically equivalent modifications made based on the content of this specification shall fall within the protection scope of the present invention.

Claims

1. A positioning jig for installing a pipe gallery reinforcement cage, characterized by: The base, the positioning frame and the lateral limiting part are included. The base includes transverse comb plates and first longitudinal comb plates; a plurality of transverse comb plates and a plurality of first longitudinal comb plates are arranged orthogonally in the horizontal direction; the top of the transverse comb plate is provided with a plurality of first notches along the length direction, for placing the distribution bars at the bottom of the steel framework; the top of the first longitudinal comb plate is provided with a plurality of second notches along the length direction, for placing the ring bars of the steel framework. The positioning frame includes a plurality of lateral positioning frames and a top positioning frame; at least two groups of lateral positioning frames are arranged oppositely in the lateral direction on both sides of the top of the base, and the top positioning frame is movably connected to the top of at least one group of lateral positioning frames; a plurality of groups of lateral positioning frames and top positioning frames are arranged along the length direction of the steel framework, so as to enclose an installation cavity with a top that can be opened and closed. The positioning frame includes a main rod, a vice rod, a plurality of hooking parts and a first locking part; the main rod is vertically connected to the top of the base; the hooking part is hinged to point A with the main rod, and one end thereof extends into the installation cavity and is provided with a bending part, for hooking the distribution bars on the side or top of the steel framework; the end of the hooking part away from the installation cavity is hinged to point B with the vice rod; a plurality of hooking parts are arranged along the length direction of the main rod and the cross rod, and any two adjacent groups of points A and B are configured as four vertices of a parallelogram, so that the vice rod drives all the hooking parts connected thereto to swing at the same angular velocity; the first locking part is used for locking or unlocking the relative translational freedom of the vice rod with respect to the main rod. The lateral limiting part includes second longitudinal comb plates and a second locking part; at least two rows of second longitudinal comb plates are arranged on both sides of the steel framework and are movably connected to the lateral positioning frame in the longitudinal direction; the side of the second longitudinal comb plate facing the installation cavity is provided with a plurality of third notches along the length direction, for limiting cooperation with the ring bars of the steel framework in the longitudinal direction at a first position; the second locking part is used for locking or unlocking the second longitudinal comb plate at the first position.

2. The positioning jig of a pipe gallery steel reinforcement framework according to claim 1, characterized in that: The top limiting part is also included; the top limiting part includes third longitudinal comb plates; the third longitudinal comb plates are connected to the top positioning frame in the longitudinal direction; the side of the second longitudinal comb plate facing the installation cavity is provided with a plurality of fourth notches along the length direction, for limiting cooperation with the ring bars of the steel framework in the longitudinal direction.

3. The positioning jig of a pipe gallery steel reinforcement framework according to claim 1, characterized in that: The positioning frame also includes an operating rod; the operating rod is connected to any one of the following: the vice rod; or the end of any one hooking part away from the installation cavity.

4. The positioning jig of a pipe gallery steel reinforcement framework according to claim 1, characterized in that: The first locking part includes a first base provided with a first positioning hole and a first positioning pin; any one of the main rod and the vice rod is connected with the first base, and the other is provided with a second positioning hole, so as to be inserted and cooperated with the first base through the first positioning pin.

5. The positioning jig of a pipe gallery steel reinforcement framework according to claim 1, characterized in that: The second locking part comprises a second base provided with a third positioning hole and a second positioning pin; the second base is hinged to the main rod at point C; the main rod of the lateral positioning frame is provided with a fourth positioning hole to be inserted with the second positioning pin and the second base; the second base is connected with the second longitudinal comb plate at a side away from the third positioning hole.

6. The positioning jig of a pipe gallery steel reinforcement framework according to claim 5, characterized in that: The second locking part further comprises a force applying rod connected with the second base or the second longitudinal comb plate.

7. The positioning jig of a pipe gallery steel reinforcement framework according to claim 1, characterized in that: The hooking part is configured in a "7" shape, comprising a corner part and a first sub-rod and a second sub-rod extending from the corner part at an angle; the corner part is hinged to the main rod at point A; one end of the first sub-rod away from the corner part is hinged to the auxiliary rod at point B; the second sub-rod is provided with the bending part at one end away from the corner part.

8. The positioning jig of a pipe gallery steel reinforcement framework according to claim 1, characterized in that: The top positioning frame is rotationally connected to the top of the lateral positioning frame at any one side.

9. The positioning jig of a pipe gallery steel reinforcement framework according to claim 1, characterized in that: The main rod of the positioning frame adopts a telescopic structure.

10. A method for installing and positioning a pipe rack steel reinforcement cage, characterized in that: The method comprises the following steps: Step 1: assembling the installation positioning jig frame, and opening the top of the installation cavity; Step 2: placing the steel bars, which comprises the following steps: Step 21: placing the distribution bars at the bottom of the steel bar framework into the first slot in the longitudinal direction; Step 22: placing the distribution bars at the side of the steel bar framework into the bending part of the lateral positioning frame in the longitudinal direction; Step 23: placing the ring bars of the steel bar framework into the second slot in the transverse direction; locking the second longitudinal comb plate at the first position by the second locking part, so that the third slot laterally clamps the ring bars; Step 24: moving the top positioning frame to the top of the steel bar framework to close the top of the installation cavity; then placing the distribution bars at the top of the steel bar framework into the bending part of the top positioning frame in the longitudinal direction; When the distribution bars to be installed are located outside the ring bars, the step 2 is sequentially performed according to the steps 21, 22, 23 and 24; when the distribution bars to be installed are located inside the ring bars, the step 2 is performed according to the steps 23, 21, 22 and 24 in no particular order; Step 3: moving the auxiliary rod of the lateral positioning frame and the top positioning frame to swing the hooking part to the working position, so that the distribution bars placed thereon abut against the ring bars; then locking the relative translational freedom degree of the auxiliary rod to the main rod by the first locking part; Step 4: connecting the distribution bars with the ring bars; Step 5: unlocking the first locking part and the second locking part, and moving the top positioning frame to open the top of the installation cavity, so that the finished steel bar framework is separated from the installation positioning jig frame.

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