Pressure test connecting tool, plugging tool and suite of flange pressure tapping orifice plate flowmeter

Abstract

The utility model provides a pressure test connection tool, a plugging tool and a suite of a flange pressure tapping orifice plate flowmeter, and belongs to the technical field of flowmeter detection equipment. The pressure test connecting tool comprises an abutting rod, a base and a sealing head are arranged at the two ends of the abutting rod respectively, the base is used for supporting the abutting rod, the abutting rod is used for abutting the sealing head, a sealing ring is arranged on the end face of the end, away from the abutting rod, of the sealing head, a communicating hole is formed in the sealing head, and the communicating hole is communicated with the connecting pipe in a sealed mode. The plugging tool comprises a connecting component, a connecting piece, a plugging cover and a pressing component, the connecting piece is connected with the pressing component and the connecting component, the plugging cover is arranged on the pressing component, and the pressing component is used for pushing the plugging cover to be pressed on the part to be plugged. The pressure test connecting tool can achieve sealed connection of the connecting pipe and the pressure tapping hole, the plugging tool can achieve sealed plugging of the opening of the orifice plate flange pressure tapping pipe, the external member can achieve rapid pressure test of the flange pressure tapping orifice plate flowmeter, and the external member is simple in structure and convenient to use.

Description

Technical Field

[0001] The utility model belongs to the technical field of flow meter detection equipment, in particular to a pressure test connection tool, a blocking tool and a kit for a flange pressure orifice plate flow meter. Background Art

[0002] Standard orifice flowmeters are suitable for measuring liquids, gases, steam, and other media. They have no moving parts and feature a simple structure, stable reliability, low cost, and easy installation and maintenance. Orifice flowmeters with flange pressure sensing primarily consist of an orifice flange, a standard orifice plate, and a pressure tube. The orifice flange and pressure tube are welded together, and the standard orifice plate is clamped by the orifice flange to form a fixed unit.

[0003] Orifice flowmeters use flange pressure sensing. The only weld on the entire instrument is at the connection between the orifice flange and the pressure tube. To verify the sealing and quality of this weld area, the orifice flange must be subjected to a hydrostatic test. Many projects, especially those in the nuclear power industry, require mandatory pressure testing of standard orifice flowmeters. The conventional test protocol for this type of open structure involves welding a blind plate to the orifice flange opening and a plug to the pressure tube opening. After the hydrostatic test, the blind plate and plug must be cut and the groove polished, requiring significant labor and material resources. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a pressure test connection tooling, a sealing tooling and a kit for a flange pressure orifice flowmeter, which is used to solve the problems of inconvenience in water pressure test connection of standard orifice flowmeters in the prior art.

[0005] To achieve the above-mentioned and other related purposes, the present invention provides a pressure test connection tool for a flange pressure orifice flowmeter, comprising a tightening rod and a connecting pipe, wherein the connecting pipe is used to connect to an external pressure test device;

[0006] A base and a sealing head are respectively provided at both ends of the tightening rod, the base is used to support the tightening rod, and the tightening rod is used to tighten the sealing head;

[0007] A sealing ring is provided on the end surface of the sealing head away from one end of the abutting rod. A communicating hole is provided in the sealing head. The opening of the communicating hole is located in the sealing ring. The communicating hole is sealed and connected to the connecting pipe.

[0008] Optionally, threads are provided on both ends of the clamping rod, and the clamping rod is threadedly connected to the base and the sealing head respectively. The clamping rod drives the base and the sealing head to move closer to or away from each other by rotating.

[0009] Optionally, the middle portion of the abutting rod is in the shape of a hexagonal column.

[0010] Optionally, a positioning protrusion is further provided on the end surface of the sealing head on which the sealing ring is provided, and the positioning protrusion protrudes from the end surface.

[0011] Optionally, the opening of the communication hole is located on the top surface of the positioning protrusion.

[0012] The present utility model also provides a pressure test sealing tool for a flange pressure orifice flowmeter, comprising a connecting member, a connecting piece, a plugging cover and a clamping member, wherein the connecting member is used to connect the parts to be sealed, the connecting piece connects the clamping member and the connecting member, the plugging cover is arranged on the clamping member, and the clamping member is used to push the plugging cover to be pressed on the parts to be sealed.

[0013] Optionally, the blocking cover has a recess for sealing the component to be blocked, and a sealing gasket is provided in the recess.

[0014] Optionally, the pressing member is a screw, the screw is threadedly connected to the connecting member, and the screw pushes the blocking cover by rotating.

[0015] Optionally, the connecting member is a clamp.

[0016] The utility model also provides a pressure test connection kit for a flange pressure orifice flowmeter, comprising any of the pressure test connection fixtures described above, and any of the pressure test sealing fixtures described above.

[0017] As described above, the pressure test connection tool, sealing tool and kit of a flange pressure orifice flowmeter of the present invention have the following beneficial effects: since a base and a sealing head are respectively provided at both ends of the clamping rod, the base is used to support the clamping rod, the clamping rod is used to clamp the sealing head, a sealing ring is provided on the end face of the sealing head away from one end of the clamping rod, a connecting hole is provided in the sealing head, and the opening of the connecting hole is located in the sealing ring. When the pressure test connection tool is provided inside the flange pressure orifice flowmeter, the clamping rod can clamp the sealing head against the pressure hole on the inner side of the orifice flange of the flange pressure orifice flowmeter. After the sealing head is clamped, the sealing ring forms a sealed space, the opening of the connecting hole is located in the sealing ring, and the connecting hole is sealed and connected to the connecting pipe, thereby realizing a sealed connection between the connecting pipe and the pressure hole, and the pressure test liquid can be introduced into the pressure hole of the orifice flange through the connecting pipe. The sealing tool includes a connecting component, a connecting piece, a plugging cover and a clamping component. The connecting component is used to connect the parts to be sealed. The connecting piece connects the clamping component and the connecting component. The plugging cover is arranged on the clamping component. The clamping component is used to push the plugging cover to be pressed on the parts to be sealed. After the plugging cover is pressed on the parts to be sealed, that is, the opening of the orifice flange pressure taking tube, the plugging cover realizes the sealing and blocking of the opening of the orifice flange pressure taking tube. After the test pressure liquid is introduced into the orifice flange pressure taking tube, the sealing connection effect between the pressure taking tube and the orifice flange can be tested, which is simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic cross-sectional view of an orifice flowmeter with flange pressure measurement in an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the installation structure of the pressure test connection kit in an embodiment of the present utility model;

[0020] Figure 3 This is a schematic cross-sectional view of the pressure test connection tooling in an embodiment of the present utility model;

[0021] Figure 4 This is a schematic cross-sectional view of the pressure testing and plugging tooling in an embodiment of the present utility model;

[0022] Figure 5 It is a schematic top view of the structure of the pressure test and plugging tooling in an embodiment of the present utility model.

[0023] Explanation of the accompanying reference numerals: pressure taking tube 1, orifice flange 2, sealing head 3, tightening rod 4, base 5, rotating part 6, sealing ring 7, connecting hole 8, connecting pipe 9, pressure test connecting tool 10, pressure test sealing tool 20, plugging cover 11, sealing gasket 12, screw 13, crossbeam 14, connecting screw 15, clamp 16, clamp body 17, locking bolt 18. DETAILED DESCRIPTION

[0024] The following describes the implementation of the present invention through specific embodiments. People familiar with this technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0025] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for understanding and reading by those familiar with this technology, and are not used to limit the conditions for implementation of the present invention. Therefore, they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed in the present invention without affecting the efficacy and purpose of the present invention. At the same time, terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments in their relative relationships should also be considered as the scope of implementation of the present invention without substantially changing the technical content.

[0026] See also Figures 1 to 5 This embodiment provides a pressure test connection fixture 10 for a flange pressure orifice flowmeter, comprising a clamping rod 4 and a connecting pipe 9, wherein the connecting pipe 9 is used to connect to an external pressure test device. A base 5 and a sealing head 3 are provided at both ends of the clamping rod 4, respectively. The base 5 is used to support the clamping rod 4, and the clamping rod 4 is used to clamp the sealing head 3. A sealing ring 7 is provided on the end surface of the sealing head 3 away from the end of the clamping rod 4, and a connecting hole 8 is provided in the sealing head 3. The opening of the connecting hole 8 is located in the sealing ring 7, and the connecting hole 8 is sealed and connected to the connecting pipe 9.

[0027] like Figure 3 As shown, in this embodiment, threads are respectively provided on both ends of the clamping rod 4, and the clamping rod 4 is threadedly connected to the base 5 and the sealing head 3 respectively. The clamping rod 4 drives the base 5 and the sealing head 3 to move closer to or away from each other by rotating, thereby realizing the disassembly or installation of the pressure test connection tooling 10.

[0028] In this embodiment, the middle part of the clamping rod 4 is in the shape of a hexagonal column, that is, the middle part of the clamping rod 4 is the rotating part 6. The rotating part 6 is in the shape of a hexagonal column, which makes it convenient to drive the clamping rod 4 to rotate through the rotating part 6. The rotating part 6 is in the shape of a hexagonal column, which is beneficial to avoid the rotating part 6 slipping during the rotation process.

[0029] In this embodiment, a positioning protrusion is also provided on the end face of the sealing head 3 on which the sealing ring 7 is provided. The positioning protrusion protrudes from the end face. The positioning protrusion can be inserted into the pressure-taking hole on the orifice plate flange 2, thereby positioning the sealing head 3 so that the sealing head 3 can be aligned with the opening of the pressure-taking hole (that is, position C), so that the opening of the pressure-taking hole is located within the range of the sealing ring 7, which is beneficial to avoid the sealing failure caused by the sealing head 3 not being aligned with the pressure-taking hole, resulting in the pressure-taking hole being at least partially outside the sealing ring 7.

[0030] In this embodiment, the opening of the connecting hole 8 is located on the top surface of the positioning protrusion, so that the opening of the connecting hole 8 can be aligned with the pressure taking hole, reducing the misalignment between the pressure taking hole and the connecting hole 8, which is beneficial to avoid the misalignment between the pressure taking hole and the connecting hole 8, resulting in poor flow of the test pressure liquid.

[0031] like Figure 4 As shown, this embodiment also provides a pressure test sealing tool 20 for a flange pressure orifice flowmeter, including a connecting member, a connecting piece, a plugging cover 11 and a clamping member. The connecting member is used to connect the parts to be sealed, the connecting piece connects the clamping member and the connecting member, the plugging cover 11 is arranged on the clamping member, and the clamping member is used to push the plugging cover 11 to be pressed on the parts to be sealed.

[0032] Specifically, in this embodiment, the plugging cap 11 has a recess for sealing the component to be sealed. That is, the recess is provided on the side of the plugging cap 11 for sealing. The sealing gasket 12 is disposed within the recess, which can improve the sealing effect of the plugging cap 11 on the component to be sealed. In this embodiment, the component to be sealed is the end opening of the pressure tapping pipe 1 (i.e., at position A).

[0033] In this embodiment, the pressing member is a screw 13 , which is threadedly connected to the connecting member. By rotating the screw 13 , the screw 13 can push the plug 11 to press against the end opening of the pressure-taking tube 1 .

[0034] In this embodiment, the connecting member is a clamp 16, which can be clamped tightly on the pressure taking pipe 1, thereby fixing the position of the pressure test plugging tool 20. Figure 5 As shown, the clamp 16 includes two semicircular clamp bodies 17 and locking bolts 18 connected to the two clamp bodies 17. When the clamp 16 is in operation, the pressure tube 1 is placed between the two clamp bodies 17 and the locking bolts 18 are turned, so that the two clamp bodies 17 clamp the pressure tube 1, thereby clamping the clamp 16 to the pressure tube 1.

[0035] In this embodiment, the connecting component includes a crossbeam 14 and a connecting screw 15. The crossbeam 14 is connected to the clamp 16 through the connecting screw 15. By rotating the connecting screw 15, the position of the crossbeam 14 can be adjusted, thereby adjusting the initial position between the screw 13, the blocking cover 11 and the component to be blocked.

[0036] This embodiment also provides a pressure test connection kit for a flange pressure orifice flowmeter, comprising the pressure test connection tool 10 described above and the pressure test plugging tool 20 described above. The pressure test connection tool 10 and the pressure test plugging tool 20 are used in combination to perform a pressure test on the flange pressure orifice flowmeter.

[0037] like Figure 2 As shown, in actual use, the pressure test connection fixture 10 is placed in the orifice flange 2, the sealing head 3 is aligned with the pressure tapping hole, the base 5 is supported on the inner wall of the orifice flange 2, and the positioning protrusion is inserted into the pressure tapping hole, thereby positioning the sealing head 3. The tightening rod 4 is rotated by the rotating portion 6, so that the sealing head 3 and the base 5 move outward along the extension direction of the tightening rod 4, thereby tightening the pressure test connection fixture 10 in the orifice flange 2. After the sealing head 3 is tightened, the sealing cavity is in sealing contact with the inner wall of the orifice flange 2 and surrounds the pressure tapping hole, achieving a sealed connection with the pressure tapping hole.

[0038] like Figure 2 As shown, when the pressure test sealing tool 20 is actually used, the plugging cover 11 is aligned with the end opening of the pressure taking tube 1, and then the clamp 16 is fixed to the pressure taking tube 1, and the connecting screw 15 is rotated to adjust the relative positions of the adjustment screw 13, the plugging cover 11 and the pressure taking tube 1, and the screw 13 is rotated. The screw 13 drives the plugging cover 11 to cover the end opening of the pressure taking tube 1, and the sealing gasket 12 blocks the end opening of the pressure taking tube 1, thereby sealing the end opening of the pressure taking tube 1.

[0039] The connecting pipe 9 is connected to an external pressure test device to perform a pressure test on the flange pressure orifice flowmeter to verify the sealing performance and connection strength of the connection between the orifice flange 2 and the pressure pipe 1 (i.e., position B), such as the weld.

[0040] After the pressure test is completed, reverse the rotation of the holding rod 4 to separate the sealing head 3 from the inner wall of the orifice flange 2, and then remove the pressure test connection fixture 10. Reverse the rotation of the screw 13 to separate the plug 11 from the end opening of the pressure taking pipe 1, and loosen the clamp 16 to remove the pressure test plugging fixture 20.

[0041] In summary, the present embodiment is a pressure test connection fixture 10 and a kit for a flange pressure orifice flowmeter. Since the two ends of the clamping rod 4 are respectively provided with a base 5 and a sealing head 3, the base 5 is used to support the clamping rod 4, and the clamping rod 4 is used to clamp the sealing head 3. A sealing ring 7 is provided on the end face of the sealing head 3 away from the clamping rod 4. A connecting hole 8 is provided in the sealing head 3. The opening of the connecting hole 8 is located in the sealing ring 7. The connecting hole 8 is sealed and connected with the connecting pipe 9. When the pressure test connection fixture 10 is set inside the flange pressure orifice flowmeter, the clamping rod 4 can press the sealing head 3 against the inner hole of the orifice flange 2 of the flange pressure orifice flowmeter. After the sealing head 3 is tightened, the sealing ring 7 forms a sealed space. The opening of the connecting hole 8 is located in the sealing ring 7. The pressure test liquid can be introduced into the pressure taking pipe 1 of the orifice flange 2 through the connecting port. The sealing tool includes a connecting member, a connecting piece, a plugging cover 11 and a clamping member. The connecting member is used to connect the parts to be sealed. The connecting piece connects the clamping member and the connecting member. The plugging cover 11 is arranged on the clamping member. The clamping member is used to push the plugging cover 11 to be pressed on the parts to be sealed. After the plugging cover 11 is pressed on the parts to be sealed, that is, the opening of the pressure taking tube 1 of the orifice flange 2, the plugging cover 11 realizes the sealing and blocking of the opening of the pressure taking tube 1 of the orifice flange 2. After the test pressure liquid is introduced into the pressure taking tube 1 of the orifice flange 2, the sealing connection effect between the pressure taking tube 1 and the orifice flange 2 can be tested, which is simple and convenient.

[0042] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed in the present invention are intended to be covered by the claims of the present invention.

Claims

1. A pressure test connection tool for a flange pressure orifice flowmeter, characterized by: It includes a tightening rod and a connecting pipe, wherein the connecting pipe is used to connect to an external pressure test device; A base and a sealing head are respectively provided at both ends of the tightening rod, the base is used to support the tightening rod, and the tightening rod is used to tighten the sealing head; A sealing ring is provided on the end surface of the sealing head away from one end of the abutting rod. A communicating hole is provided in the sealing head. The opening of the communicating hole is located in the sealing ring. The communicating hole is sealed and connected to the connecting pipe.

2. The pressure test connection fixture for the flange pressure orifice flowmeter according to claim 1, characterized in that: Threads are respectively provided on both ends of the clamping rod, and the clamping rod is threadedly connected to the base and the sealing head respectively. The clamping rod drives the base and the sealing head to move closer to or away from each other by rotating.

3. The pressure test connection fixture for the flange pressure orifice flowmeter according to claim 1, characterized in that: The middle part of the abutting rod is in the shape of a hexagonal column.

4. The pressure test connection fixture for the flange pressure orifice flowmeter according to claim 1, characterized in that: The end surface of the sealing head on which the sealing ring is provided is further provided with a positioning protrusion, and the positioning protrusion protrudes from the end surface. 5 . The pressure test connection fixture of the flange pressure orifice flowmeter according to claim 4 , wherein the opening of the communicating hole is located on the top surface of the positioning protrusion.

6. A pressure test plugging tool for a flange pressure orifice flowmeter, characterized by: It includes a connecting member, a connecting piece, a blocking cover and a pressing member. The connecting member is used to connect the parts to be sealed. The connecting piece connects the pressing member and the connecting member. The blocking cover is arranged on the pressing member. The pressing member is used to push the blocking cover to press on the parts to be sealed.

7. The pressure test and plugging tool for the flange pressure orifice flowmeter according to claim 6, characterized in that: The blocking cover is provided with an inner recess for sealing the component to be blocked, and a sealing gasket is arranged in the inner recess.

8. The pressure test and plugging tool for the flange pressure orifice flowmeter according to claim 6, characterized in that: The pressing member is a screw rod, which is threadedly connected to the connecting member, and the screw rod pushes the blocking cover by rotating.

9. The pressure test and plugging tool for the flange pressure orifice flowmeter according to claim 6, characterized in that: The connecting component is a hoop.

10. A pressure test connection kit for a flange pressure orifice flowmeter, characterized by: It comprises the pressure test connection tool as described in any one of claims 1 to 5, and the pressure test sealing tool as described in any one of claims 6 to 9.

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