CN209614716U - A kind of positioning fixture suitable for steel arch-shelf connecting plate - Google Patents

Abstract

The utility model belongs to positioning technical field of construction when steel arch-shelf junction steel plate welds in Tunnel, disclose a kind of positioning fixture suitable for steel arch-shelf connecting plate, including snap-gauge, limit plate and collet, snap-gauge is corresponding with the size of connection backing plate, the card slot of U-shaped structure is provided on snap-gauge, card slot is corresponding with the arch of steel arch-shelf, one end face of limit plate is fixed on the outer middle side part of the intermediate plate of snap-gauge, the front and rear sides of limit plate protrude from snap-gauge for limiting to connection backing plate, collet is fixed on the outer wall of one of side wall of snap-gauge, limit plate and collet, which are jointly constituted connection backing plate, to be limited.The utility model improves working efficiency, using positioning fixture while guaranteeing quality of connection, positioning correcting time and on-site consolidation time before substantially reducing connection backing plate welding, has saved cost of labor, has accelerated construction speed.

Description

A positioning fixture suitable for connecting plates of steel arch frames

technical field

The utility model belongs to the technical field of positioning construction during the welding of steel arch connecting steel plates in the initial support of tunnels, and relates to a positioning fixture suitable for steel arch connecting plates.

Background technique

With the construction of national high-speed and railway networks, tunnel projects are increasing day by day. The new Austrian method is mostly used in the tunnel construction. How to ensure the safety of the tunnel construction and improve the quality of the tunnel construction is one of the important issues for the construction personnel. The initial support of the tunnel is an important part of the construction of the new Austrian method, and the steel arch in the initial support is an important structure to restrain the deformation of the surrounding rock. Due to construction needs, the steel arches are processed in sections at the steel bar processing site, and high-strength bolts are used on site to connect them. The connection quality of the steel arches connecting the steel plates directly affects the stress of the steel arches and the difficulty of on-site assembly. During the construction, the inaccurate positioning of the connecting steel plates often leads to welding misalignment, and the assembly deviation of the arch frame is too large, which cannot fully exert the rigid support function of the steel arch frame.

Utility model content

In view of this, the purpose of the utility model is to provide a positioning fixture suitable for the connecting plate of the steel arch frame.

In order to achieve the above object, the utility model provides the following technical solutions:

A positioning fixture suitable for connecting plates of steel arches, including a clamping plate, a limiting plate and a bottom bracket, the clamping plate corresponds to the size of the connecting backing plate, and a U-shaped clamping groove is opened on the clamping plate, and the clamping groove and the Corresponding to the arch frame of the steel arch frame, one end surface of the limit plate is fixed on the outer middle of the middle plate of the clamp plate, and the front and rear sides of the limit plate protrude from the clamp plate to limit the connection backing plate, and the bottom bracket is fixed On the outer wall of one of the side walls of the clamping plate, the limiting plate and the bottom support together form a limiting for the connection backing plate.

Further, a pair of bolt holes distributed along the length direction of the slot are respectively opened on the clamp plates on both sides of the clamp slot, and the bolt holes correspond to the reserved bolt holes on the connection backing plate.

Further, the card board is a square structure.

Further, the card slot is a rectangular structure.

Further, the other end surface of the limiting plate is fixed with a handle for easy clamp operation.

Further, the bottom support is a rectangular steel plate, the bottom support protrudes from the clamping plate and is perpendicular to the clamping plate, the length of the bottom support is the same as the length of the clamping plate, and the two end surfaces of the bottom support are flush with the end surfaces of the clamping plate.

Further, the height of the limiting plate is smaller than that of the clamping plate.

The beneficial effects of the utility model are:

(1) The utility model has the advantages of simple structure, convenient manufacture, convenient operation and low cost;

(2) The utility model improves work efficiency, uses the positioning fixture to ensure the quality of the connection, and greatly shortens the positioning correction time before the welding of the connection backing plate and the on-site assembly time, saves labor costs, and speeds up the construction progress;

(3) The utility model improves the welding quality of the steel arch connecting backing plate, ensures that the steel arch is straight after assembly, fully exerts the rigid support function of the steel arch, and ensures construction safety.

Other advantages, objectives and features of the present utility model will be set forth in the following description to some extent, and to some extent, based on the investigation and research below, it will be obvious to those skilled in the art, or can be Get teaching from the practice of the utility model. The objectives and other advantages of the utility model can be realized and obtained through the following description.

Description of drawings

In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be described in detail below in conjunction with the accompanying drawings, wherein:

Fig. 1 is the front view of the utility model embodiment;

Fig. 2 is the top view of the utility model embodiment;

Fig. 3 is the right side view of the utility model embodiment;

Fig. 4 is the front view when the utility model embodiment operates;

Fig. 5 is the top view when the utility model embodiment is in operation;

Fig. 6 is the right side view when the utility model embodiment operates;

Fig. 7 is the construction flowchart of the utility model embodiment.

Explanation of reference signs:

1. Clamping plate; 11. Card slot; 12. Bolt hole; 2. Limiting plate; 3. Bottom bracket; 4. Handle; 5. Connecting backing plate; 6. I-beam.

Detailed ways

The implementation of the present utility model is described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. The utility model can also be implemented or applied through other different specific implementation modes, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the utility model. It should be noted that the illustrations provided in the following embodiments are only schematically illustrating the basic idea of the present utility model, and the following embodiments and the features in the embodiments can be combined with each other in the case of no conflict.

Wherein, accompanying drawing is only for exemplary illustration, and what represent is only schematic diagram, rather than physical figure, can not be interpreted as the restriction to the utility model; In order to better illustrate the embodiment of the utility model, some parts of accompanying drawing will The omission, enlargement or reduction does not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

In the accompanying drawings of the utility model embodiment, the same or similar symbols correspond to the same or similar parts; The orientation or positional relationship indicated by "right", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying the referred device Or elements must have a specific orientation, structure and operation with a specific orientation, so the terms describing the positional relationship in the drawings are only for illustrative purposes, and cannot be understood as limitations on the present utility model. For those of ordinary skill in the art , the specific meanings of the above terms can be understood according to specific situations.

As shown in FIGS. 1 to 6 , a positioning fixture suitable for connecting plates of a steel arch frame includes a clamping plate 1 , a limiting plate 2 and a bottom bracket 3 . The clamping plate 1 has a square structure, and the clamping plate 1 is provided with a U-shaped clamping groove 11. The clamping groove 11 is a rectangular structure, and the clamping groove 11 is matched with the I-shaped steel. The size of the clamping plate 1 is the same as that of the connecting backing plate 5 Corresponding. One end face of the limiting plate 2 is fixed on the outer middle part of the middle plate of the clamping plate 1, the height of the limiting plate 2 is less than the height of the clamping plate 1, the width of the limiting plate 2 is wider than the width of the clamping plate 1, and the limiting plate 2 The front and rear sides protrude from the clamping plate 1 for limiting the connection backing plate 5 . The other end surface of the limiting plate 2 is fixed with a handle 4 which is convenient for clamp operation.

The bottom support 3 is fixed on the outer wall of one of the side walls of the clamping plate 1, the bottom support 3 is a rectangular steel plate, the bottom support 3 protrudes from the clamping plate 1 and is perpendicular to the clamping plate 1, the length of the bottom support 3 is the same as the length of the clamping plate 1 Similarly, the two end surfaces of the bottom bracket 3 are flush with the end surfaces of the clamping plate 1 . The limiting plate 2 and the bottom bracket 3 jointly limit the connecting backing plate 5 , the limiting plate 2 positions the connecting backing plate 5 from the horizontal direction, and the bottom bracket 3 positions the connecting backing plate 5 from the vertical direction.

A pair of bolt holes 12 distributed along the length direction of the slot 11 are respectively opened on the clamping plates 1 on both sides of the slot 11 , and the bolt holes 12 are symmetrical to the slot 11 . The bolt holes 12 correspond to the bolt holes 12 reserved on the connection backing plate 5 .

As shown in Figure 7, the preparation method of the present utility model:

(1) Make the connecting backing plate 5 with a steel plate according to the size of the connecting backing plate 5 indicated on the drawings, and act as the base plate of the clamping plate 1 .

(2) Mark the connection area between the end of the steel arch frame and the connecting backing plate 5 on the base plate, cut the steel plate surface into a U-shaped slot 11 according to the cross-sectional size of the section steel used in the steel arch frame, and use a cutting machine to connect the connection area A U-shaped card slot 11 is cut out at one end of the backing plate 5 to complete the production of the card plate 1 .

(3) Steel plates are used to make the limit plate 2 and the bottom bracket 3, and smooth round steel bars are used to make the handle 4.

(4) The limiting plate 2, the bottom support 3 and the clamping plate 1 are connected by a welding process, and the operating handle 4 is welded on the limiting plate 2 to complete the production of the fixture.

(5) To check the production quality of the jig, place the connecting backing plate 5 on the bottom bracket 3 and close to the limit plate 2, and the bolt holes 12 reserved for the connecting backing plate 5 and the bolt holes 12 on the clamping plate 1 completely overlap each other. be usable.

(6) Make the steel arch frame and connecting backing plate 5 according to the drawing requirements, install the connecting backing plate 5 positioning fixture at the end of the arch frame, place the connecting backing plate 5 on the bottom support 3 of the fixture, and close to the limit plate 2. Solder the connecting pad 5.

In a specific embodiment, the grade V surrounding rock of the tunnel is designed as an I20a steel arch frame, the size of the connecting backing plate 5 is 220mm×220mm, and the thickness of the connecting backing plate 5 is 1cm.

(1) Cut the steel plate with a thickness of 1cm into a steel backing plate of 220mm×220mm, punch and drill Φ22 bolt holes 12 on the cut steel backing plate according to the drawings, and complete the production of the connecting backing plate 5, and take a connecting backing plate 5 Acts as card board 1 substrate.

(2) Mark the connection area between the I20a end and the connection backing plate 5 on the substrate, and use a cutting machine to cut out a U-shaped slot 11 from one end of the connection backing plate 5 to complete the production of the backing plate 1 .

(3) Use 5mm steel plates to make the limit plate 2 and the bottom support 3, and use Φ10mm smooth round steel bars to make the handle 4.

(4) The limiting plate 2, the bottom support 3 and the card groove 11 are connected by welding process, and the operating handle 4 is welded on the limiting plate 2 to complete the fixture production.

(5) Fixture inspection of the connecting backing plate 5, place the connecting backing plate 5 on the bottom support 3, and close to the limit plate 2, the bolt holes 12 reserved for the connecting backing plate 5 and the bolt holes 12 of the clamping plate 1 completely overlap each other. Can be used as a positioning fixture.

(6) Process the steel arch frame according to the requirements of the drawings. The arch frame is I-shaped steel, and the positioning fixture is installed at the 6 ends of the I-shaped steel. The bottom bracket 3 is on the outside, and the connecting pad 5 is placed on the bottom bracket 3 of the positioning fixture. , and aligned with the four sides of the positioning fixture, the connecting backing plate 5 is close to the limit plate 2, the inner side of the connecting backing plate 5 is close to the clamping plate 1 and the end of the I-beam 6, and check whether the reserved bolt holes 12 are completely overlapped. Subsequent processing can be carried out only after passing the test. The connection between the backing plate 5 and the I-beam 6 is spot-welded with carbon dioxide shielded welding. After the spot welding is fixed firmly, the positioning fixture is removed and welded firmly with carbon dioxide shielded welding to complete the assembly of the steel arch.

7) On-site assembly. After the steel arches are transported to the construction site, the steel arches are installed according to the requirements, and the arches are connected by high-strength bolts to complete the assembly of the steel arches.

The utility model aims at the welding quality control of the connecting steel plate of the steel arch frame, and develops a connecting steel plate positioning jig. The connecting steel plate welded after being positioned by the positioning jig can ensure the connection quality of the connecting steel plate and the steel arch frame, and achieve precise positioning. Give full play to the rigid support function of the steel arch. And it can greatly improve the construction efficiency and ensure the installation quality of the steel arch.

Finally, it is noted that the above embodiments are only used to illustrate the technical solutions of the present utility model without limitation. Although the utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the utility model can be Modifications or equivalent replacements of the technical solutions without departing from the spirit and scope of the technical solutions shall be covered by the claims of the present utility model.

Claims (7)

1. a kind of positioning fixture suitable for steel arch-shelf connecting plate, it is characterised in that: including snap-gauge (1), limit plate (2) and collet (3), snap-gauge (1) is corresponding with the size of connection backing plate (5), is provided with the card slot (11) of U-shaped structure on snap-gauge (1), card slot (11) with The arch of steel arch-shelf is corresponding, and an end face of limit plate (2) is fixed on the outer middle side part of the intermediate plate of snap-gauge (1), limit plate (2) front and rear sides protrude from snap-gauge (1) for limiting to connection backing plate (5), and collet (3) is fixed on its of snap-gauge (1) In a side wall outer wall on, limit plate (2) and collet (3) jointly constitute connection backing plate (5) and limit.

2. the positioning fixture according to claim 1 suitable for steel arch-shelf connecting plate, it is characterised in that: card slot (11) two sides Snap-gauge (1) on be respectively provided with a pair of bolt hole (12) being distributed along card slot (11) length direction, bolt hole (12) and connection gasket The bolt hole (12) reserved on plate (5) is corresponding.

3. the positioning fixture according to claim 1 suitable for steel arch-shelf connecting plate, it is characterised in that: snap-gauge (1) is side Shape structure.

4. the positioning fixture according to claim 1 suitable for steel arch-shelf connecting plate, it is characterised in that: card slot (11) is square Shape structure.

5. the positioning fixture according to claim 1 suitable for steel arch-shelf connecting plate, it is characterised in that: limit plate (2) The handle (4) convenient for fixture operation is fixed on another end face.

6. the positioning fixture according to claim 1 suitable for steel arch-shelf connecting plate, it is characterised in that: collet (3) is square Shape steel plate, collet (3) protrude from snap-gauge (1) and vertical with snap-gauge (1), and the length of collet (3) is identical as the length of snap-gauge (1), Two end faces of collet (3) and the end face of snap-gauge (1).

7. the positioning fixture according to claim 1 suitable for steel arch-shelf connecting plate, it is characterised in that: limit plate (2) Height is less than the height of snap-gauge (1).