A sealing device and method for porous lance assembly leak check

Abstract

The application discloses a sealing device and method for checking the sealing property of a porous spray rod assembly, which comprises a flange cover, a rectangular tube, a rubber pad, a plug and a cylindrical pin. The two ends of the rectangular tube are respectively positioned and assembled with the flange cover and the plug through the cylindrical pin, the flange cover is provided with a rectangular stepped through hole, and the rubber pad is installed on the stepped surface of the rectangular stepped through hole. When checking the sealing property, the small hole part of the spray rod is put into the rectangular tube, the mounting edge of the spray tube is tightly pressed on the end surface of the rubber pad and the flange cover through bolts to form a seal, and then high-pressure water is introduced to check the sealing property of the joint weld of the spray rod and the pipeline and the sealing property of the threaded connection pipe joint. The application solves the problem of difficult plugging of the small holes on the side surface of the spray rod during the sealing property check of the spray rod assembly, and can efficiently and conveniently seal the spray rod as a whole during the test check.

Description

Technical Field

[0001] This invention relates to a sealing device and method for checking the sealing performance of a multi-hole spray bar assembly, mainly used for checking the sealing performance of the weld seam between the spray bar and the pipeline joint and the threaded connection pipe joint in the spray bar assembly. Background Technology

[0002] like Figure 1 As shown, this spray bar is a hollow part with multiple small holes (diameter φ0.6) on its sides. After machining, a sealing test is required at the weld joints and threaded pipe joints connecting to the pipeline, using water as the test medium. Conventionally, the small holes on the sides of the spray bar need to be sealed before the sealing test. However, due to the small diameter, large number, and dispersed nature of the holes on the sides of the spray bar, coupled with the high pressure (8MPa) required for the test, sealing is difficult. Currently, there is no suitable method for sealing these small holes that meets the requirements. Furthermore, if sealing the small holes is used, it is necessary to consider how to remove the sealing material from the holes after the sealing test to prevent residue from remaining in the spray bar, thus complicating the operation.

[0003] For the reasons mentioned above, it is necessary to design a sealing device and sealing method that is efficient, easy to operate, and effective in sealing. Summary of the Invention

[0004] The present invention aims to provide a sealing device and method for sealing inspection of multi-hole spray bar assemblies, solving the problem of difficulty in sealing the small holes on the side of the spray bar during sealing inspection, and enabling efficient and convenient overall sealing of the spray bar during testing.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A sealing device for checking the sealing performance of a multi-hole spray bar assembly, comprising:

[0007] A rectangular tube, open at both ends, with a rectangular cross-section cavity inside to accommodate a spray bar, and each end of the rectangular tube has a ring of circumferentially arranged positioning blind holes.

[0008] The flange cover has a rectangular cross-section and is assembled on the first open end of the rectangular tube. There is a flange edge on the assembly surface of the flange cover and the rectangular tube, along the rectangular outline edge of the flange cover. A first through hole is provided on the flange edge. The first end of the rectangular tube is inserted into the inner outline side of the flange edge, so that the first through hole on the flange edge is matched with the positioning blind hole of the first end of the rectangular tube one by one. A rectangular stepped through hole is opened on the end face of the flange cover away from the rectangular tube, and multiple threaded blind holes are machined on the stepped surface of the rectangular stepped through hole.

[0009] The rubber gasket is a rectangular rubber gasket and is installed on the stepped surface of the rectangular stepped through hole of the flange cover. The rubber gasket has a third through hole, and the distribution position of the third through hole is consistent with the threaded blind hole on the stepped surface of the rectangular stepped through hole of the flange cover.

[0010] The plug is assembled at the open end of the second end of the rectangular tube. There is a ring of rectangular protrusions on the assembly surface of the plug and the rectangular tube. A second through hole is opened on the protrusion. The second end of the rectangular tube is inserted into the inner contour side of the protrusion, so that the second through hole is matched with the positioning blind hole of the second end of the rectangular tube one by one.

[0011] A cylindrical pin is inserted into the first through hole of the flange cover and the positioning blind hole at the first end of the rectangular tube, as well as the second through hole of the plug and the positioning blind hole at the second end of the rectangular tube.

[0012] The rectangular tube, flange cover, and plug are welded together to form a single unit.

[0013] As an option:

[0014] The weld between the rectangular tube and the flange cover extends along the junction of the flange edge end of the flange cover and the circumferential surface of the rectangular tube.

[0015] The weld between the rectangular tube and the plug extends along the junction of the protruding end of the plug and the circumferential surface of the rectangular tube.

[0016] A sealing method for checking the sealing performance of a multi-hole spray bar assembly, employing the aforementioned sealing device, and comprising the following steps:

[0017] Step 1: Insert the part of the spray bar with small holes into the cavity of the rectangular tube through the rectangular stepped through hole of the flange cover until all the small holes on the spray bar are located in the cavity and the mounting edge of the spray bar is in contact with the rubber pad. Align the mounting hole on the mounting edge of the spray bar, the third through hole on the rubber pad, and the threaded blind hole on the flange cover.

[0018] Step 2: Insert bolts into the mounting holes on the spray bar mounting edge, the third through hole on the rubber gasket, and the threaded blind hole on the flange cover to press the spray bar mounting edge onto the flange cover;

[0019] Step 3: Connect the high-pressure water source and check the sealing between the spray bar mounting edge and the flange cover end face. Ensure the sealing by adjusting the tightening torque of the bolts in Step 2.

[0020] Step 4: Continue to pressurize. When the water pressure reaches the required test pressure value, maintain the pressure and check the sealing of the welds between the spray bar and the pipe joints, as well as the threaded connection pipe joints.

[0021] Step 5: After the sealing check is completed, first depressurize, then rotate the bolt in the opposite direction to remove the spray bar from the sealing device.

[0022] Compared to existing technologies, this invention does not employ the traditional method of individually sealing the small holes on the spray bar. Instead, it seals the entire portion of the spray bar containing the small holes within a closed cavity. The sealing surface is formed by the mounting edge of the spray bar and the flange cover end face of the sealing device, thus avoiding the tedious operation of sealing the small holes and the removal of any sealing material. Because the sealing area between the flange cover and the mounting edge of the spray bar is large and the sealing surface is flat, the operation is more convenient, the sealing effect is better, and time is saved.

[0023] This invention solves the sealing problem of the small holes on the side of the spray bar during the sealing inspection of multi-hole spray bar assemblies, and has the advantages of high sealing efficiency and convenient operation. Currently, this sealing device and method have been applied to on-site product sealing inspections, achieving the expected results. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the spray bar that needs to be sealed in this invention;

[0025] Figure 2 This is a schematic diagram of the sealing device designed in this invention;

[0026] Figure 3 This is a diagram illustrating the sealing test.

[0027] In the diagram: 1---Flange cover; 2---Rectangular tube; 3---Gasket; 4---Plug; 5---Cylindrical pin. Detailed Implementation

[0028] The present invention will be further described below with reference to specific embodiments, but it should not be construed as limiting the scope of the subject matter of the present invention to the following embodiments. All modifications, substitutions and alterations made based on ordinary technical knowledge and common practices in the art without departing from the above-described technical concept of the present invention are included within the scope of the present invention.

[0029] like Figures 2-3 As shown, this invention presents a sealing device for checking the sealing performance of a multi-hole spray bar assembly, comprising a flange cover 1, a rectangular tube 2, a rubber gasket 3, a plug 4, and a cylindrical pin 5. Except for the rubber gasket 3, the remaining parts are connected together by welding to form the main body of the sealing device.

[0030] like Figure 2The rectangular tube 2 is open at both ends, and its internal rectangular cross-section cavity is used to accommodate the spray bar. Each end of the rectangular tube 2 has a ring of circumferentially arranged positioning blind holes. The flange cover 1 has a rectangular cross-section and is assembled at the first open end of the rectangular tube 2. A flange edge is formed on the mounting surface of the flange cover 1 and the rectangular tube 2, along the rectangular outline of the flange cover 1. A first through hole is provided on the flange edge. The first end of the rectangular tube 2 is inserted into the inner outline of the flange edge, such that the first through hole on the flange edge matches one by one with the positioning blind holes at the first end of the rectangular tube 2. A rectangular stepped through hole is opened on the end face of the flange cover 1 away from the rectangular tube 2, and multiple threaded blind holes are machined on the stepped surface of the rectangular stepped through hole. The rubber gasket 3 is a rectangular rubber gasket and is installed on... On the stepped surface of the rectangular stepped through hole of flange cover 1, a third through hole is opened on the gasket 3, and the distribution position of the third through hole is consistent with the threaded blind hole on the stepped surface of the rectangular stepped through hole of flange cover 1; the plug 4 is assembled at the second end of the rectangular tube 2, and there is a ring of rectangular outline protrusion on the assembly surface of plug 4 and rectangular tube 2. A second through hole is opened on the protrusion. The second end of rectangular tube 2 is inserted into the inner contour side of the protrusion, so that the second through hole is matched with the positioning blind hole of the second end of rectangular tube 2 one by one; the cylindrical pin 5 is inserted into the first through hole of flange cover 1 and the positioning blind hole of the first end of rectangular tube 2, as well as the second through hole of plug 4 and the positioning blind hole of the second end of rectangular tube 2 to achieve precise positioning of rectangular tube 2 with flange cover 1 and plug 4, which facilitates subsequent welding.

[0031] like Figure 2 As shown, the rectangular tube 2, flange cover 1, and plug 4 are welded together to form a whole. The weld between the rectangular tube 2 and the flange cover 1 extends along the junction of the flange edge end of the flange cover 1 and the circumferential surface of the rectangular tube 2; the weld between the rectangular tube 2 and the plug 4 extends along the junction of the protruding end of the plug 4 and the circumferential surface of the rectangular tube 2.

[0032] A method for using a sealing device for checking the sealing performance of a multi-hole spray bar is as follows:

[0033] Step 1, press Figure 3 Insert the spray boom Figure 2 Within the sealing device shown, ensure Figure 1 All the small holes in the middle enter the inner cavity of the rectangular tube 2, and the mounting edge of the spray bar is in contact with the rubber gasket 3 of the sealing device and the end face of the flange cover 1;

[0034] Step 2, according to Figure 2 View from direction A: Install 8 hexagonal head bolts and tighten them to press the spray bar mounting edge, rubber gasket 3, and flange cover 1 together to form a seal;

[0035] Step 3: Connect the high-pressure water source and check the sealing between the spray bar mounting edge and the flange cover 1 end face of the device. Ensure a seal by adjusting the torque of the 8 hexagonal head bolts.

[0036] Step 4: Continuously pressurize. When the water pressure reaches the required test pressure value, maintain the pressure and check the sealing of the weld between the spray bar and the pipe joint, as well as the threaded connection pipe joint.

[0037] Step 5: After the sealing check is completed, first depressurize, then loosen the 8 hexagonal head bolts and remove the spray bar from the sealing device.

[0038] Contents not described in detail in this specification are prior art known to those skilled in the art. Although illustrative specific embodiments of the invention have been described above to facilitate understanding by those skilled in the art, it should be understood that the invention is not limited to the scope of the specific embodiments. Various modifications are readily apparent to those skilled in the art as long as they fall within the spirit and scope of the invention as defined and determined by the appended claims, and all inventions utilizing the concept of this invention are protected.

Claims

1. A sealing device for checking the sealing performance of a multi-hole spray bar assembly, characterized in that, include: A rectangular tube (2) has open ends, and its internal rectangular cross-section cavity is used to accommodate the spray bar. Each end of the rectangular tube (2) has a ring of positioning blind holes arranged along the circumference. Flange cover (1), the cross section of the flange cover (1) is rectangular, the flange cover (1) is assembled at the first open end of the rectangular tube (2), the flange cover (1) and the rectangular tube (2) have a flange edge on the assembly surface and along the rectangular outline edge of the flange cover (1), the flange edge is provided with a first through hole, the first end of the rectangular tube (2) is inserted into the inner outline side of the flange edge and the first through hole on the flange edge is matched with the positioning blind hole of the first end of the rectangular tube (2) one by one, the flange cover (1) has a rectangular stepped through hole on the end face away from the rectangular tube (2), and multiple threaded blind holes are machined on the stepped surface of the rectangular stepped through hole; The rubber pad (3) is a rectangular rubber pad and is installed on the step surface of the rectangular stepped through hole of the flange cover (1). The rubber pad (3) has a third through hole, and the distribution position of the third through hole is consistent with the threaded blind hole on the step surface of the rectangular stepped through hole of the flange cover (1). The plug (4) is assembled at the second end of the rectangular tube (2). The plug (4) and the rectangular tube (2) have a ring of rectangular outline protrusions on their assembly surface. A second through hole is opened on the protrusion. The second end of the rectangular tube (2) is inserted into the inner outline side of the protrusion, so that the second through hole is matched with the positioning blind hole of the second end of the rectangular tube (2) one by one. Cylindrical pin (5), the cylindrical pin (5) is inserted into the first through hole of the flange cover (1) and the positioning blind hole at the first end of the rectangular tube (2), and into the second through hole of the plug (4) and the positioning blind hole at the second end of the rectangular tube (2); The rectangular tube (2), flange cover (1) and plug (4) are welded together to form a whole.

2. The sealing device for checking the sealing performance of a multi-hole spray bar assembly according to claim 1, characterized in that: The weld between the rectangular tube (2) and the flange cover (1) extends along the junction of the flange edge end of the flange cover (1) and the circumferential surface of the rectangular tube (2). The weld between the rectangular tube (2) and the plug (4) extends along the junction of the protruding end of the plug (4) and the circumferential surface of the rectangular tube (2).

3. A sealing method for checking the sealing performance of a multi-hole spray bar assembly, characterized in that, The sealing device of claim 1 is used, and includes the following steps: Step 1: Insert the part of the spray bar with small holes into the cavity of the rectangular tube (2) through the rectangular stepped through hole of the flange cover (1) until all the small holes on the spray bar are located in the cavity and the mounting edge of the spray bar is attached to the rubber pad (3). Align the mounting hole on the mounting edge of the spray bar, the third through hole on the rubber pad (3) and the threaded blind hole on the flange cover (1). Step 2: Insert bolts into the mounting holes on the spray bar mounting edge, the third through hole on the rubber gasket (3), and the threaded blind hole on the flange cover (1) to press the spray bar mounting edge onto the flange cover (1); Step 3: Connect the high-pressure water source and check the sealing between the spray bar mounting edge and the flange cover (1) end face. Ensure the sealing by adjusting the tightening torque of the bolts in Step 2. Step 4: Continue to pressurize. When the water pressure reaches the required test pressure value, maintain the pressure and check the sealing of the welds between the spray bar and the pipe joints, as well as the threaded connection pipe joints. Step 5: After the sealing check is completed, first depressurize, then rotate the bolt in the opposite direction to remove the spray bar from the sealing device.

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