Detachable blocking plate type protection device

Abstract

The utility model provides a detachable blocking plate type protection device, which belongs to the field of pressure vessel welding and comprises a front blocking plate and a rear blocking plate which are used for blocking outlets on two sides of a workpiece to be welded and are connected through a connecting rod. The connecting rod is arranged on the inner side of the front blocking plate, the end of the connecting rod penetrates out of the rear blocking plate from an inner cavity of a workpiece to be welded, a blocking piece is connected to the connecting rod and used for applying thrust to the rear blocking plate, so that a sealed containing cavity is formed in the workpiece to be welded, and an air inlet pipe is inserted into the rear blocking plate to enable inert gas to be filled into the sealed containing cavity. The device has the advantages that the device can be suitable for girth welding of workpieces with the diameter smaller than 400 mm, argon protection is carried out on the back face of a girth, the structure is simple, use is convenient, the forming state of the girth can be observed at any time in the welding process, welding parameters can be flexibly adjusted in the follow-up process, and the quality of the girth is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to pressure vessel welding field, especially a detachable blocking plate type protection device. BACKGROUND

[0002] In the production process of pressure vessel, many welds need to adopt tungsten argon arc welding method to complete the welding process, and in order to ensure the forming quality of the weld, argon protection is adopted to the back of the weld during welding to ensure the weld quality.

[0003] In the prior art, the inside of the workpiece to be welded is formed into a sealed cavity by reciprocally pasting adhesive tape at the outlets of the two sides of the workpiece to be welded, and the inlet pipe is inserted from the adhesive tape at one side outlet, so that argon is filled into the cavity, but this method has the following problems:

[0004] 1. Whether a sealed cavity can be formed depends on the adhesion and pasting method of the adhesive tape, and different operators cannot guarantee the consistency of the pasting process every time, and cannot ensure whether the cavity is completely sealed, and in use, gas will leak from the gap where the pasting is not firm, and the tearing of the adhesive tape will leave adhesive marks on the workpiece;

[0005] 2. The superimposed adhesive tape reduces the permeability and is not convenient for the operator to observe the forming state of the weld;

[0006] 3. When welding new parts, the adhesive tape needs to be re-pasted, and after welding is completed, the adhesive tape also needs to be removed, and cannot be reused. INVENTION CONTENTS

[0007] The utility model aims at overcoming the defects of the prior art, and provides a detachable blocking plate type protection device which can be applied to the girth welding of a workpiece with a diameter less than 400 mm, can perform argon protection on the back of the girth, has a simple structure, is convenient to use, can realize the observation of the forming state of the weld at any time during welding, facilitates the subsequent flexible adjustment of the welding parameters, and ensures the weld quality.

[0008] To solve the above technical problems, the utility model adopts the technical scheme of a detachable blocking plate type protection device, which comprises a front blocking plate and a rear blocking plate for blocking the outlets of the two sides of a workpiece to be welded, and the front blocking plate and the rear blocking plate are connected through a connecting rod.

[0009] The connecting rod is arranged on the inner side of the front blocking plate, the end portion of the connecting rod penetrates out of the rear blocking plate from the inner cavity of the workpiece to be welded, a blocking piece is connected to the connecting rod, a pushing force is applied to the rear blocking plate, a sealed cavity is formed in the workpiece to be welded, and an inlet pipe is inserted from the rear blocking plate to fill inert gas into the sealed cavity.

[0010] Further, a supporting beam is arranged in the middle portion of the front blocking plate to provide a contact point for the connecting rod.

[0011] Further, a visual window is arranged on the front blocking plate, and the visual window is arranged on both sides of the support beam to observe the forming shape of the back of the weld.

[0012] Further, the connecting rod is an A connecting rod, the end of the A connecting rod is arranged on the inner side of the support beam, and a plurality of A clamping holes are arranged on the A connecting rod to connect the blocking piece.

[0013] Further, the connecting rod is a B connecting rod, the end of the B connecting rod is connected to the inner side of the support beam through an elastic component, and a plurality of B clamping holes are arranged on the B connecting rod to connect the blocking piece.

[0014] Further, a sealing gasket is arranged on the inner side of the front blocking plate and the inner side of the rear blocking plate, and the diameter of the sealing gasket is matched with the caliber of the workpiece to be welded.

[0015] Further, a connecting hole is arranged on the rear blocking plate, and the connecting hole is arranged concentrically with the connecting rod.

[0016] Further, a ventilation hole is arranged on the rear blocking plate, and the ventilation hole is arranged to insert the air inlet pipe.

[0017] Further, a sealing ring is arranged in the connecting hole.

[0018] The utility model has the advantages and positive effects that:

[0019] 1. According to the above technical scheme, the front blocking plate and the rear blocking plate are arranged to replace the traditional adhesive tape to seal the outlets on both sides of the workpiece to be welded, compared with the sealing of the outlets on both sides of the workpiece to be welded by a plurality of adhesive tapes, the sealing of the outlets on both sides of the workpiece to be welded by the integrated blocking plate can effectively prevent the gas from leaking out of the gap and increase the sealing performance.

[0020] 2. The front blocking plate and the rear blocking plate are connected through the connecting rod, the rear blocking plate is pushed by the blocking piece, the front and rear blocking plates are clamped to the outlets on both sides of the workpiece to be welded, a sealed cavity is formed in the workpiece, the air inlet pipe is inserted into the rear blocking plate, argon is filled into the sealed cavity, and the back of the weld is protected.

[0021] 3. The visual window arranged on the front blocking plate is convenient for observing the forming shape of the back of the weld, the welding parameters can be adjusted in time according to the state, and the welding quality is improved. DRAWINGS

[0022] Figure 1 is a structural schematic diagram of an embodiment 1 of the utility model;

[0023] Figure 2 is a structural schematic diagram of an embodiment 2 of the utility model;

[0024] Figure 3is a front baffle structure schematic diagram of the utility model;

[0025] Figure 4 is a rear baffle structure schematic diagram of the utility model;

[0026] Figure 5 is the use state diagram of embodiment 1 of the utility model;

[0027] Figure 6 is the use state diagram of embodiment 2 of the utility model.

[0028] In the drawing,

[0029] 1, front baffle;11, visual window;

[0030] 2, rear baffle;21, connecting hole;22, sealing ring;23, air hole;

[0031] 3, air inlet pipe;4, sealing gasket;

[0032] 5, A connecting rod;51, A clamping hole;

[0033] 6, B connecting rod;61, hanging ring;62, B clamping hole;

[0034] 7, spring. DETAILED DESCRIPTION

[0035] The utility model is further explained in connection with the embodiment and the drawing.

[0036] As Figures 1 to 6 shown, the embodiment provides a detachable baffle type protection device, including the front baffle 1 and rear baffle 2 that are closed in the export at both sides of the workpiece to be welded, and the front baffle 1 and rear baffle 2 are connected through connecting rod;

[0037] The connecting rod is arranged at the inner side of the front baffle 1, and the end of the connecting rod is inserted into the rear baffle 2 from the inner cavity of the workpiece to be welded, and the blocking piece is connected on the connecting rod, which is used to apply the inward thrust to the rear baffle 2, so that the rear baffle 2 is tightly attached to the workpiece to be welded, and the sealed cavity is formed in the workpiece to be welded, and the air inlet pipe 3 is inserted into the rear baffle 2, so that the inert gas is filled into the sealed cavity, and in the embodiment, the inert gas adopts argon.

[0038] The supporting beam is arranged in the middle of the front baffle 1, which provides the connecting point for the connecting rod, and the connecting rod is connected on the supporting beam in the center of the front baffle 1.

[0039] In order to observe the forming mode of the back of the weld during welding, the visual window 11 is arranged on the front baffle 1, and the visual window 11 is oppositely arranged on both sides of the supporting beam and is in the semicircular type, and in the embodiment, the visual window 11 adopts glass material.

[0040] The rear baffle 2 is provided with a connecting hole 21 through which the connecting rod passes and a vent hole 23 through which the air inlet pipe 3 is inserted, and the connecting hole 21 is concentric with the connecting rod.

[0041] To increase the sealing performance of the cavity, a sealing gasket 4 is arranged on the inner side of the front baffle 1 and the inner side of the rear baffle 2, and the diameter of the sealing gasket 4 matches the caliber of the workpiece to be welded, and a sealing ring 22 is arranged in the connecting hole 21.

[0042] Embodiment 1:

[0043] The connecting rod is an A connecting rod 5, one end of the A connecting rod 5 is arranged on the inner side of the support beam, a plurality of A clamping holes 51 are arranged on the A connecting rod 5, the A clamping holes 51 are threaded holes, the A clamping holes 51 are used for connecting the blocking piece, the blocking piece can be a bolt, the bolt is connected with the corresponding A clamping hole through the thread, and the rear baffle 2 is pressed to limit the position.

[0044] In another embodiment, the A connecting rod 5 is not provided with the A clamping hole 51, and a thread is arranged at the rear end of the A connecting rod 5, the blocking piece is a nut, and the rear baffle 2 is fixed in position by tightening the nut.

[0045] Embodiment 2:

[0046] The connecting rod is a B connecting rod 6, the end of the B connecting rod 6 is connected with the inner side of the support beam through an elastic component, specifically, a connecting ring is arranged on the inner side of the front baffle 1, and a hanging ring 81 is arranged on the end of the B connecting rod 6, in this embodiment, the elastic component is a spring 7, one end of the spring 7 is hooked with the connecting ring, and the other end of the spring 7 is hooked with the hanging ring 81, and the spring 7 pulls the B connecting rod 8 to approach the front baffle 1.

[0047] A plurality of B clamping holes 62 are arranged on the B connecting rod 8, the B clamping holes 62 are used for connecting the blocking piece, in this embodiment, the B clamping holes 62 are threaded holes, the blocking piece can be a bolt or a threaded connecting column, the blocking piece is connected with the corresponding B clamping hole 62 through the thread, and the blocking piece is further pressed against the rear baffle 2 through the pulling force of the spring 7 to strengthen the adhesion of the rear baffle 2 to the workpiece to be welded.

[0048] In another embodiment, the B clamping hole 62 is a through hole, the blocking piece can be a connecting column, the connecting column can be T-shaped or straight-cylindrical, the connecting column is inserted into the corresponding B clamping hole 62, and the connecting column drives the rear baffle 2 to adhere to the workpiece to be welded through the pulling force of the spring 7.

[0049] Working process of this example:

[0050] The connecting rod is inserted from one end of the workpiece to be welded, passes through the inner cavity and is then taken out from the other end of the workpiece to be welded, so that the front baffle 1 adheres to the outlet at one end of the workpiece to be welded, and the rear baffle 2 is inserted into the connecting hole 21 from the end of the connecting rod and approaches the outlet at the other end of the workpiece to be welded.

[0051] Embodiment 1

[0052] On the outside of the rear baffle 2, the blocking piece is screwed with the A card hole 51 on the A connecting rod 5, and the rear baffle 2 is fixed and close to the outlet of the workpiece to be welded by the extrusion of the blocking piece.

[0053] Embodiment 2

[0054] Pulling the B connecting rod 6 outward, the spring 7 is stretched, the blocking piece is connected to the corresponding B card hole 61, and the B connecting rod 6 is loosened. Because the spring 7 is contracted, the blocking piece on the B connecting rod 6 always presses the rear baffle 2, so that the rear baffle 2 is close to the outlet of the workpiece to be welded.

[0055] After the clamping of the front and rear baffles is completed, the inside of the workpiece to be welded forms a sealed cavity, and argon is introduced from the gas inlet pipe 3.

[0056] The welding device welds the welding point outside, and the argon protects in the cavity.

[0057] The above one or more embodiments of the utility model are described in detail, but the content is only the preferred embodiment of the utility model, and cannot be considered as limiting the scope of the utility model. Any equivalent changes and improvements within the scope of the utility model application should still belong to the patent coverage of the utility model.

Claims

1. A removable bulkhead protector, characterized by: The front stop plate (1) and the rear stop plate (2) are connected by a connecting rod; The connecting rod is arranged on the inner side of the front stop plate (1), and the end of the connecting rod is arranged to pass through the rear stop plate (2) from the inner cavity of the workpiece to be welded, and a blocking piece is connected to the connecting rod to apply a pushing force to the rear stop plate (2) to form a sealed cavity in the workpiece to be welded, and an air inlet pipe (3) is inserted into the rear stop plate (2) to fill the sealed cavity with inert gas; A support beam is arranged in the middle of the front stop plate (1) to provide a joint for the connecting rod; The connecting rod is an A connecting rod (5), and the end of the A connecting rod (5) is arranged on the inner side of the support beam, and a plurality of A clamping holes (51) are arranged on the A connecting rod (5) for connecting the blocking piece; A sealing gasket (4) is arranged on the inner side of the front stop plate (1) and the inner side of the rear stop plate (2), and the diameter of the sealing gasket (4) matches the caliber of the workpiece to be welded.

2. A removable blanking panel protection device according to claim 1, wherein: A visual window (11) is arranged on the front stop plate (1), and the visual window (11) is arranged on the two sides of the support beam to observe the forming shape of the back of the weld.

3. A removable blanking panel protection device according to claim 1, wherein: The connecting rod is a B connecting rod (6), and the end of the B connecting rod (6) is connected to the inner side of the support beam through an elastic member, and a plurality of B clamping holes (62) are arranged on the B connecting rod (6) for connecting the blocking piece.

4. The removable blanking panel protection device of claim 1, wherein: A connecting hole (21) is arranged on the rear stop plate (2), and the connecting hole (21) is arranged concentrically with the connecting rod.

5. The removable blanking panel protection device of claim 1, wherein: An air hole (23) is arranged on the rear stop plate (2) for the air inlet pipe (3) to insert.

6. A removable blanking panel protection device according to claim 4, wherein: A sealing ring (22) is arranged in the connecting hole (21).

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