Overhaul tool for OMB welding cryogenic forging valve

Abstract

The utility model relates to the technical field of valve maintenance, in particular to an OMB welding cryogenic forging valve maintenance tool. The tool comprises a tensioning piece, a positioning piece and a tension assembly, one face of the tensioning piece is provided with a clamping portion used for being clamped with a spring valve seat in a valve, the positioning piece is used for being connected with an opening flange of the valve, the tensioning piece is connected with a sliding block, the tension assembly is connected with the tensioning piece, and the clamping portion is used for being clamped with a spring valve seat in the valve. And the clamping part is used for pulling the tensioning piece to translate, so that the spring valve seat is compressed by the clamping part to be far away from the valve core of the valve. The tool has the advantages that the tool is simple and reasonable in structural design, the spring valve seat can be quickly and conveniently separated from the valve element, so that the valve element can be quickly taken out, and the use cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of valve repair, in particular to an OMB welding deep cold forging valve repair tool. Background Art

[0002] OMB deep cold forged welded ball valve is widely used in cryogenic fluid equipment. Its main structure includes handle, valve body, valve core and spring seal structure (see the structure diagram for details). Figure 1 and Figure 2 ). During use, due to the welding connection method, especially when it is used in working conditions where replacement is impossible or the replacement cost is high, when the valve has internal leakage, it is impossible to complete the maintenance online, resulting in the system being unable to be used normally or material loss; or when replacing the internal valve core and other parts during maintenance, due to the lack of special tools, the maintenance is extremely difficult.

[0003] Based on this, it is necessary to develop a special OMB welding deep cold forging valve maintenance tool to overcome the above-mentioned technical problems. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide an OMB welding deep cold forging valve repair tool, which effectively overcomes the defects of the prior art.

[0005] The technical solution of the utility model to solve the above technical problems is as follows:

[0006] An OMB welded deep cold forging valve maintenance tool comprises a tensioning piece, a positioning piece and a tensioning assembly. One side of the tensioning piece is provided with a clamping portion for clamping with a spring valve seat in the valve. The positioning piece is used to be connected to the opening flange of the valve. The tensioning piece is connected with a sliding connection. The tensioning assembly is connected to the tensioning piece and is used to pull the tensioning piece to translate, thereby compressing the spring valve seat away from the valve core of the valve through the clamping portion.

[0007] On the basis of the above technical solution, the present invention can also be improved as follows.

[0008] Furthermore, both ends of the tensioning member are respectively penetrated with strip holes extending toward both sides thereof, and the positioning member passes through the strip holes and is connected to the opening flange of the valve.

[0009] Furthermore, the positioning member includes two positioning bolts, and the two positioning bolts respectively penetrate the two strip holes and are connected to the two bolt holes on the opening flange of the valve.

[0010] Furthermore, the above-mentioned strip-shaped holes are oval holes.

[0011] Further, the tension member is a cuboid-shaped block member, and two of the above-mentioned strip-shaped holes extending in the width direction thereof are respectively provided at both ends in the length direction thereof.

[0012] Further, the engaging portion is a sheet member provided at the middle of the long side of one surface of the tension member and perpendicular to the tension member.

[0013] Further, the tension assembly includes a positioning block and a tension structure. The positioning block is provided on one side of the tension member, and a parallel positioning pin is respectively provided at both ends close to one side of the tension member. Guide holes are respectively provided through the two strip-shaped holes close to the positioning block along their respective length directions. The two positioning pins respectively pass through the two guide holes and extend into the two strip-shaped holes. The two positioning pins are in contact and abutted against the positioning member. The tension structure is mounted on the positioning block and connected to the tension member for driving the tension member to translate along the positioning pins.

[0014] Further, the positioning block is a cuboid-shaped block member parallel to the tension member.

[0015] Further, first screw holes penetrating through both sides of the positioning block are provided, and a second screw hole coaxially provided with the first screw hole is provided in the middle of the side of the tension member close to the positioning block. The tension structure includes a tension rod. Threads are provided on the outer portion of one end of the tension rod, and one end of the tension rod penetrates through the first screw hole and is screwed with the first screw hole.

[0016] Further, a handle perpendicular to the tension rod is provided at the other end of the tension rod.

[0017] The beneficial effects of the present utility model are as follows: The tool structure is designed simply and reasonably. By using this tool, the spring valve seat and the valve core can be separated quickly and conveniently, so that the valve core can be taken out quickly, and the use cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of an OMB cryogenic forging welded ball valve in the prior art;

[0019] Figure 2 is a schematic structural diagram of the OMB cryogenic forging welded ball valve in the prior art after removing the valve stem and the internal extension rod of the valve stem;

[0020] Figure 3 is a structural sectional view of the OMB welded cryogenic forging valve repair tool of the present utility model;

[0021] Figure 4 is a schematic structural diagram of the OMB welded cryogenic forging valve repair tool of the present utility model from another perspective;

[0022] Figure 5Schematic structural diagram of another embodiment of the OMB welded cryogenic forging valve maintenance tool of the present utility model;

[0023] Figure 6 Schematic structural diagrams of some other embodiments of the OMB welded cryogenic forging valve maintenance tool of the present utility model;

[0024] Figure 7 Schematic structural diagrams of still some other embodiments of the OMB welded cryogenic forging valve maintenance tool of the present utility model.

[0025] In the drawings, the list of components represented by each reference numeral is as follows:

[0026] 1. Tightening member; 2. Positioning member; 3. Tensile assembly; 11. Engaging portion; 12. Strip-shaped hole; 31. Positioning block; 32. Tensile structure; 311. Positioning pin; 321. Handle. Specific embodiments

[0027] The principles and features of the present utility model will be described below with reference to the accompanying drawings. The examples given are only for explaining the present utility model and are not intended to limit the scope of the present utility model.

[0028] Embodiment: As Figure 3-7 shown, the OMB welded cryogenic forging valve maintenance tool of this embodiment includes a tightening member 1, a positioning member 2, and a tensile assembly 3. One side of the above-mentioned tightening member 1 is provided with an engaging portion 11 for engaging with the spring valve seat inside the valve. The above-mentioned positioning member 2 is used to connect with the opening flange of the valve. The above-mentioned tightening member 1 is slidably connected, and the above-mentioned tensile assembly 3 is connected to the above-mentioned tightening member 1 for pulling the above-mentioned tightening member 1 to translate, so as to compress the spring valve seat away from the valve core through the engaging portion 11.

[0029] During the use of the OMB welded cryogenic forging valve maintenance tool of this embodiment, the positioning member 2 and the tightening member 1 are slidably connected in advance, and then in accordance with Figure 1 and Figure 2The structure shown removes the valve stem (designated as A in the figure) of the OMB cryogenic forging welded ball valve and the extension rod inside the valve stem (designated as B in the figure), so that after removal, parts of the valve core (designated as C in the figure) and the spring seat (designated as D in the figure) of the valve are exposed through the open flange (designated as E in the figure). Next, the positioning member 2 is assembled and fixed at the open flange of the valve. At the same time, the engaging portion 11 on one side of the tension member 1 passes through the open flange and extends into the valve body, and the end of the engaging portion 11 is inserted into the upper part between the connection of the spring seat and the valve core to complete the engagement with the end of the spring seat. Then, operate the tension assembly 3 to drive the tension member 1 to translate above the open flange. During this translation process, the spring seat is elastically compressed by pushing through the engaging portion 11, so that the spring seat is separated from the valve core, and then the valve core can be quickly taken out. The overall tool structure is simple and reasonable. Using this tool can quickly and conveniently separate the spring seat from the valve core, so as to quickly take out the valve core, and the use cost is low.

[0030] As a preferred embodiment, strip holes 12 extending towards both sides are respectively provided through both ends of the above-mentioned tension member 1, and the above-mentioned positioning member 2 passes through the above-mentioned strip holes 12 and is connected to the open flange of the above-mentioned valve.

[0031] In the above-mentioned implementation scheme, during assembly, the positioning member 2 is pre-passed through the two strip holes 12, and then the positioning member 2 is connected and fixed to the open flange. After the tension member 1 is subjected to the tension of the tension assembly 3, due to the design of the strip holes 12, it can translate relative to the positioning member 2 along the length direction of the strip holes 12. The length direction of the strip holes 12 is consistent with the compression trajectory of the spring flange, ensuring that the spring flange can be effectively compressed and thus moved away from the valve core. The design of the strip holes 12 restricts the translation trajectory of the tension member 1, ensuring that the spring seat can be compressed.

[0032] As a preferred embodiment, the above-mentioned positioning member 2 includes two positioning bolts, and the two above-mentioned positioning bolts respectively pass through the two above-mentioned strip holes 12 and are connected to two bolt holes on the open flange of the above-mentioned valve.

[0033] In the above-mentioned implementation scheme, after the valve stem is removed from the valve body, there is a circle of bolt holes distributed at intervals on the open flange. The distance between the two strip holes 12 is exactly the same as that of the two bolt holes at the opposite ends of the open flange. When the two positioning bolts pass through the two strip holes 12, the two positioning bolts are exactly aligned with the two bolt holes at the opposite ends of the open flange. Through threaded connection, the two positioning bolts are firmly fixed on the open flange of the valve body. Coupled with the translation of the tension member 1, the compression spring seat can be driven to move away from the valve core. The structure design is simple and reasonable. The stable assembly of the positioning member 2 can be realized by using the original bolt holes on the open flange, and the disassembly and assembly are very simple and fast.

[0034] In this embodiment, the above-mentioned strip-shaped hole 12 is an oval hole. Its width dimension is almost the same as the diameter dimension of the positioning bolt of the positioning member 2, ensuring that there is no relative jump in the width direction of the strip-shaped hole 12 after the positioning bolt passes through the oval hole.

[0035] As a preferred embodiment, the above-mentioned tensioning member 1 is a cuboid-shaped block member, and two of the above-mentioned strip-shaped holes 12 extending towards its width direction are respectively provided at both ends in the length direction thereof.

[0036] In the above-mentioned implementation scheme, the shape of the tensioning member 1 is designed regularly, which is easy to produce and the assembly is also relatively convenient.

[0037] As a preferred embodiment, the above-mentioned engaging portion 11 is a sheet member provided at the middle of the long side of one surface of the above-mentioned tensioning member 1 and perpendicular to the above-mentioned tensioning member 1.

[0038] In the above-mentioned implementation scheme, the structure of the engaging portion 11 is designed simply, and the sheet member can be inserted into the upper gap at the connection between the spring valve seat and the valve core, so as to realize effective engagement with the spring valve seat.

[0039] In this embodiment, the engaging portion 11 can be fixed to the tensioning member 1 by welding. Of course, considering the firmness of welding, a fixing plate surface perpendicular to its main body is provided at the connection portion between the engaging portion 11 and the tensioning member 1 (as Figure 5 shown), this fixing plate surface fits on one surface of the tensioning member 1, and the whole surface is welded and fixed to one surface of the tensioning member 1. The welding surface is larger and the connection between the two is more firm.

[0040] As a preferred embodiment, the above-mentioned tension assembly 3 includes a positioning block 31 and a tension structure 32. The above-mentioned positioning block 31 is arranged on one side of the above-mentioned tensioning member 1, and a parallel positioning pin 311 is respectively provided at both ends close to one side of the above-mentioned tensioning member 1. Guide holes are respectively provided through the two ends of the two above-mentioned strip-shaped holes 12 close to the positioning block 31 along their respective length directions. The two above-mentioned positioning pins 311 respectively pass through the two above-mentioned guide holes and extend into the two above-mentioned strip-shaped holes 12. The two above-mentioned positioning pins 311 are in contact with and against the above-mentioned positioning member 2. The above-mentioned tension structure 32 is installed on the above-mentioned positioning block 31 and is connected to the above-mentioned tensioning member 1 for driving the above-mentioned tensioning member 1 to translate along the above-mentioned positioning pins 311.

[0041] In the above-mentioned implementation scheme, through the cooperation of the positioning pin 311 and the tensioning member 1, the effective connection and relative displacement change between the two are realized. At the same time, the design of the positioning block 31 facilitates the good assembly of the tension structure 32. During the operation, the end of the positioning pin 311 is abutted against the positioning member 2 passing through the strip-shaped hole 12, and then the tension structure 32 is operated to drive the tensioning member 1 to move towards the positioning block 31, which can drive the engaging portion 11 to compress the spring valve seat.

[0042] As a preferred embodiment, the positioning block 31 is a cuboid-shaped block member parallel to the tension member 1.

[0043] In the above-mentioned embodiment, the positioning block 31 has a regular shape design, and its outer shape is almost the same as that of the tension member 1, which is easy to produce and the assembly is also relatively convenient.

[0044] As a preferred embodiment, the positioning block 31 is provided with first screw holes penetrating through both sides thereof. In the middle of one side of the tension member 1 close to the positioning block 31, there is a second screw hole coaxially arranged with the first screw hole. The tension structure 32 includes a tension rod. One end of the tension rod is externally provided with threads, and one end of the tension rod penetrates through the first screw hole and is screwed with the first screw hole.

[0045] In the above-mentioned embodiment, after the positioning member 2 and the opening flange are assembled, rotate the tension rod so that one end of the tension rod is screwed into the second screw hole. At the same time, make the positioning pin 311 abut against the positioning member 2 in the strip-shaped hole 12, and then operate the tension rod to rotate. Since the tension member 1 is restricted and will not rotate with the tension rod, only translation in the length direction of the tension rod will occur. Therefore, the tension member 1 will drive the spring valve seat to translate towards the positioning block 31 through the engaging portion 11, thereby compressing the spring valve seat away from the valve core. This operation is relatively convenient and only requires rotating the tension rod.

[0046] As a preferred embodiment, as Figure 6 shown, a handle 321 perpendicular to the other end of the tension rod is provided.

[0047] In the above-mentioned embodiment, when operating the tension rod to rotate, torque can be applied by holding the handle 321, and the operation is relatively convenient.

[0048] In this embodiment, as Figure 7 shown, the positioning block 31 can also adopt a portal-shaped member. Positioning members 2 (positioning bolts) are vertically penetrated through both ends of the portal-shaped member respectively. The tension member 1 passes through the inside of the positioning block 31 and is slidably connected to both ends of the positioning block 31. A lead screw (designated as f in the figure) is rotatably provided in the middle of one side of the positioning block 31. A nut (designated as m in the figure) is sleeved on the lead screw. A connecting rod (designated as g in the figure) is provided in the middle of one end of the tension member 1. The connecting rod is fixedly connected to the nut. When the lead screw is rotated, the nut drives the connecting rod and the tension member 1 to translate, so that the engaging portion 11 on one side of the tension member 1 compresses the spring valve seat. Specifically, sliding grooves are provided on the mutually approaching surfaces at both ends of the positioning block 31, and both ends of the tension member 1 are slidably connected to the sliding grooves at both ends respectively.

[0049] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the present utility model.

[0050] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0051] In the present utility model, unless otherwise clearly specified and defined, the terms "mounted", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0052] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0053] In the description of this specification, the descriptions referring to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0054] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present utility model.

Claims

1. An OMB welding cryogenic forging valve maintenance tool, characterized in that: It includes a tension member (1), a positioning member (2) and a tension assembly (3). One side of the tension member (1) is provided with an engaging portion (11) for engaging with the spring seat inside the valve. The positioning member (2) is used to connect with the opening flange of the valve. The tension member (1) is slidably connected, and the tension assembly (3) is connected to the tension member (1) for pulling the tension member (1) to translate, so as to compress the spring seat away from the valve core through the engaging portion (11).

2. The overhaul tool for OMB welded cryogenic forging valves according to claim 1, characterized in that: Bar-shaped holes (12) extending towards both sides are respectively provided through both ends of the tension member (1). The positioning member (2) passes through the bar-shaped holes (12) and is connected to the opening flange of the valve.

3. The overhaul tool for OMB welded cryogenic forged valves according to claim 2, characterized in that: The positioning member (2) includes two positioning bolts. The two positioning bolts respectively pass through the two bar-shaped holes (12) and are connected to two bolt holes on the opening flange of the valve.

4. An OMB welding cryogenic forging valve maintenance tool according to claim 2, characterized in that: The bar-shaped holes (12) are oblong holes.

5. The OMB welding cryogenic forging valve maintenance tool according to claim 2, characterized in that: The tension member (1) is a cuboid-shaped block member, and the two ends in its length direction are respectively provided with the two bar-shaped holes (12) extending towards its width direction.

6. The OMB welding cryogenic forging valve maintenance tool according to claim 5, characterized in that: The engaging portion (11) is a sheet-shaped member provided at the middle of the long side of one side of the tension member (1) and perpendicular to the tension member (1).

7. An OMB welding cryogenic forging valve maintenance tool according to claim 5, characterized in that: The tension assembly (3) includes a positioning block (31) and a tension structure (32). The positioning block (31) is arranged on one side of the tension member (1). One parallel positioning pin (311) is respectively provided at both ends close to one side of the tension member (1). Guide holes are respectively provided through the ends of the two bar-shaped holes (12) close to the positioning block (31) along their respective length directions. The two positioning pins (311) respectively pass through the two guide holes and extend into the two bar-shaped holes (12). The two positioning pins (311) are in contact and abutted against the positioning member (2). The tension structure (32) is installed on the positioning block (31) and is connected to the tension member (1) for driving the tension member (1) to translate along the positioning pins (311).

8. An overhaul tool for an OMB welded cryogenic forged valve according to claim 7, characterized in that: The positioning block (31) is a cuboid-shaped block member parallel to the tension member (1).

9. An OMB welding cryogenic forging valve maintenance tool according to claim 7, characterized in that: First screw holes penetrating through both sides of the positioning block (31) are provided. A second screw hole coaxially arranged with the first screw hole is provided at the middle of one side of the tension member (1) close to the positioning block (31). The tension structure (32) includes a tension rod. Threads are provided on the outside of one end of the tension rod, and one end of the tension rod passes through the first screw hole and is screwed with the first screw hole.

10. An OMB welding cryogenic forging valve maintenance tool according to claim 9, characterized in that: A handle (321) perpendicular to it is provided at the other end of the tension rod.

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