Pressure testing device of welding valve

Abstract

The utility model discloses a pressure testing device of a welding valve, which comprises a support, a fixing assembly used for being fixedly connected with the welding valve, two pressure applying power assemblies and two pressure testing blind plates used for being connected with two welding grooves in an abutting mode. The two pressure applying power assemblies are arranged opposite to two welding grooves of the welding valve and are fixedly installed on the support, and each pressure testing blind plate is connected with the transmission end of the corresponding pressure applying power assembly; the pressure test blind plate is provided with a water injection channel which penetrates through the pressure test blind plate, and the two ends of the water injection channel are externally connected with a water source and communicated with the welding groove respectively. The pressure testing device for the welding valve is simple in overall structure, convenient to operate and high in operation efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of valve pressure testing, in particular to a pressure testing device for welded valves. Background Technique

[0002] Before a valve is put into use, a valve pressure test needs to be carried out to check whether the performance of the valve body strength, packing gland sealing performance, and sealing pair sealing performance meets the design requirements. Generally speaking, most valves are straight-through valves with detachable connections, so the pressure testing devices are mainly for straight-through valves with detachable connections, and there are very few pressure testing devices specifically for angle valves with welded connections (hereinafter referred to as welded valves).

[0003] At present, for welded valves, their pressure testing generally uses welded plugs or blind plugs for temporary sealing. The main disadvantage of using a welded plug for temporary sealing is that the plug needs to be cut again after the pressure test, the groove needs to be processed, and the inside of the valve needs to be cleaned. Moreover, if the cleaning is not thorough, there is a great risk of damage to the valve sealing pair, so there are many inconveniences. The main disadvantage of using a blind plug for temporary sealing is that usually, the plug can only be designed and processed for valves of specific specifications, and the application is single. Especially for large-diameter angle welded valves, during the pressure test, it is difficult to support and fix the valve body, and the required sealing and clamping force is large. At present, there is no mature pressure testing device available. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a pressure testing device for welded valves.

[0005] The technical solution adopted by the utility model to solve its technical problem is: a pressure testing device for welded valves, including

[0006] a bracket;

[0007] a fixing component for fixedly connecting the welded valve, connected to the bracket;

[0008] two pressure application power components, arranged opposite to the two welding grooves of the welded valve and respectively installed and fixed on the bracket;

[0009] two pressure testing blind plates for abutting against the two welding grooves, each pressure testing blind plate being connected to the transmission end of the pressure application power component; the pressure testing blind plate is provided with a water injection channel, the water injection channel penetrates through the pressure testing blind plate, and both ends of the water injection channel are externally connected to a water source and communicate with the welding groove.

[0010] In some embodiments, the pressure test blind plate includes a pressure-bearing block and a seal. The pressure-bearing block is connected to the transmission end of the pressure application power assembly, and the seal is detachably connected to the pressure-bearing block. The water inlet end of the water injection channel penetrates through the pressure-bearing block to connect to an external water source, and the water injection end of the water injection channel penetrates through the seal and communicates with the welding groove.

[0011] The seal is provided with a sealing surface, the sealing surface abuts against the end surface of the welding groove, and the size of the sealing surface is greater than or equal to the size of the end surface of the welding groove.

[0012] In some embodiments, the sealing surface is trumpet-shaped.

[0013] In some embodiments, the bracket includes a bottom plate for placing the welding valve, a first vertical plate connected to one of the pressure application power assemblies, a second vertical plate connected to the other pressure application power assembly, and a third vertical plate connected to the side surface of the welding valve through the fixing assembly. The first vertical plate, the second vertical plate, and the third vertical plate are sequentially connected to form a U-shaped structure and are respectively connected and fixed to the bottom plate.

[0014] In some embodiments, two mutually parallel rail grooves are provided on the first vertical plate and / or the second vertical plate, and the pressure application power assembly is detachably connected to the two rail grooves through fasteners.

[0015] In some embodiments, the fixing assembly includes at least two bottom plate fixing blocks for fixing the welding valve and a set of top screws for abutting against the side surface of the welding valve. The bottom plate fixing blocks protrude from the bottom plate and abut against the bottom of the welding valve, and the set of top screws is screwed to the third vertical plate.

[0016] In some embodiments, the fixing assembly further includes a top plate abutting against the top of the welding valve, and the top plate is detachably connected to the bottom plate through fasteners.

[0017] In some embodiments, the pressure application power assembly includes a power member and a movable vertical plate. The movable vertical plate is detachably connected to the bracket, the power member is installed on the movable vertical plate, and the transmission end of the power member is connected to the pressure test blind plate.

[0018] In some embodiments, the power member is a hydraulic jack or an electric jack.

[0019] In some embodiments, the pressure test device for the welding valve further includes a plurality of wheels, and the plurality of wheels are installed at the bottom of the bracket.

[0020] By implementing the present utility model, the following beneficial effects are achieved:

[0021] The pressure testing device for a welded valve of the present utility model includes a bracket, a fixing component for fixedly connecting the welded valve, which is connected to the bracket, two pressure application power components, which are arranged opposite to the two welding grooves of the welded valve and are respectively installed and fixed on the bracket; two pressure testing blind plates for abutting against the two welding grooves, each of the pressure testing blind plates being connected to the transmission end of the pressure application power component; the pressure testing blind plate is provided with a water injection channel, the water injection channel penetrates through the pressure testing blind plate and both ends of the water injection channel are externally connected to a water source and communicate with the welding groove. The support and fixation of the welded valve are realized through the bracket and the fixing component. The pressure application power components are installed on the bracket. The pressure application power components can drive the pressure testing blind plates to approach or move away from the welding grooves. During pressure testing, the pressure testing blind plates abut against the welding grooves, and sufficient sealing force is provided by the pressure application power components. After the pressure testing is completed, there is no need for cutting and disassembly. The overall structure is simple, the operation is convenient, and the operation efficiency is high. Description of the Drawings

[0022] The following will further illustrate the present utility model in conjunction with the drawings. In the drawings:

[0023] Figure 1 is the top view of the pressure testing device for a welded valve according to an embodiment of the present utility model;

[0024] Figure 2 is Figure 1 the front view of the pressure testing device for the welded valve in

[0025] Figure 3 is Figure 1 the structural schematic diagram of the pressure testing blind plate in Detailed Embodiment

[0026] In order to have a clearer understanding of the technical features, objectives, and effects of the present utility model, the specific embodiments of the present utility model will now be described in detail with reference to the drawings.

[0027] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0028] In the description of the utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the 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. Therefore, it should not be construed as a limitation to the utility model. In addition, terms such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0029] In the description of the utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or a chemical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the utility model can be understood through specific circumstances.

[0030] See Figure 1 and Figure 2 , an embodiment of the utility model discloses a pressure test device for a welded valve, which is particularly suitable for the pressure test of a large-diameter angle welded valve 6. While protecting the welding groove 61, it ensures the sealing performance and is also suitable for the pressure test of valves with multiple specifications of calibers.

[0031] The pressure test device for the welded valve includes a bracket 1, a fixing component 2, two pressure application power components 3, and two test pressure blind plates 4. The fixing component 2 is connected to the bracket 1 and is used to fixedly connect the welded valve 6. The two pressure application power components 3 are arranged opposite to the two welding grooves 61 of the welded valve 6 and are respectively installed and fixed on the bracket 1, and the pressure application power components 3 correspond to the welding grooves 61 one by one. Each test pressure blind plate 4 is connected to the transmission end of the pressure application power component 3. The two test pressure blind plates 4 are used to abut against the two welding grooves 61 for pressure test plugging, and the test pressure blind plates 4 correspond to the welding grooves 61 one by one. The test pressure blind plate 4 is provided with a water injection channel 43. The water injection channel 43 penetrates through the test pressure blind plate 4, and both ends of the water injection channel 43 are respectively externally connected to a water source and communicate with the welding groove 61.

[0032] Understandably, when performing a pressure test operation on the welded valve 6 using the pressure test device with a welded valve, the welded valve 6 is supported and fixed through the bracket 1 and the fixing component 2. The pressure application power component 3 drives the test pressure blind plate 4 to approach the welding groove 61 until the test pressure blind plate 4 abuts against the welding groove 61 and provides sufficient clamping thrust. Then, the test pressure water is injected through one of the water injection channels 43. After ensuring that the water medium fills the valve cavity, an external component such as a plug is used to block the other water injection channel 43, and then the water pressure is increased to the target test pressure, and the water source is cut off, thereby completing the pressure test.

[0033] In some embodiments, also referring to Figure 3 , the test pressure blind plate 4 includes a pressure-bearing block 41 and a seal 42. The pressure-bearing block 41 is connected to the transmission end of the pressure application power component 3, and the seal 42 is detachably connected to the pressure-bearing block 41 for easy replacement. The water inlet end of the water injection channel 43 penetrates through the pressure-bearing block 41 to connect to an external water source, and the water injection end of the water injection channel 43 penetrates through the seal 42 and communicates with the welding groove 61. The seal 42 is provided with a sealing surface 421, and the sealing surface 421 abuts against the end surface of the welding groove 61, and the size of the sealing surface 421 is greater than or equal to the size of the end surface of the welding groove 61.

[0034] Preferably, in order to adapt to the welding groove 61, the pressure-bearing block 41 and the seal 42 are respectively set as cylindrical shapes. The end surface of the seal 42 facing the welding groove 61 is the sealing surface 421, and the sealing surface 421 is trumpet-shaped. Any radial cross-section of the sealing surface 421 is a ring, and the radial cross-sections at different positions can be applicable to welding grooves 61 of different sizes.

[0035] In some embodiments, the bracket 1 includes a bottom plate 11 for placing the welded valve 6, a first vertical plate 12 connected to one pressure application power component 3, a second vertical plate 13 connected to the other pressure application power component 3, and a third vertical plate 14 connected to the side of the welded valve 6 through the fixing component 2. The first vertical plate 12, the second vertical plate 13, and the third vertical plate 14 are sequentially connected to form a U-shaped structure and are respectively connected and fixed to the bottom plate 11. Preferably, the first vertical plate 12, the second vertical plate 13, and the third vertical plate 14 can be connected and fixed to the bottom plate 11 by bolts or welding. The first vertical plate 12, the second vertical plate 13, and the third vertical plate 14 are respectively provided with rib structures to strengthen the fixation. Since the two welding grooves 61 of the welded valve 6 are arranged perpendicular to each other, the first vertical plate 12, the second vertical plate 13, and the third vertical plate 14 are adaptively arranged. The first vertical plate 12 and the third vertical plate 14 are parallel to each other, and the second vertical plate 13 is perpendicular to the first vertical plate 12 and the third vertical plate 14.

[0036] In some embodiments, two mutually parallel rail grooves 15 are provided on the first vertical plate 12 and the second vertical plate 13, or only two mutually parallel rail grooves 15 are provided on the first vertical plate 12, or only two mutually parallel rail grooves 15 are provided on the second vertical plate 13. The pressure - applying power assembly 3 is detachably connected to the two rail grooves 15 through fasteners. The position of the pressure - applying power assembly 3 can be adjusted on the first vertical plate 12 to adapt to the positions of the two welding grooves 61 of different models of welding valves 6, so as to keep the axes of the pressure - applying power assembly 3, the pressure - testing blind plate 4 and the welding groove 61 on the same side of the welding valve 6 coincident. When two rail grooves 15 are provided on both the first vertical plate 12 and the second vertical plate 13, the position of the pressure - applying power assembly 3 is adjusted successively. Preferably, the two rail grooves 15 are respectively U - shaped rail grooves 15, extending horizontally along the first vertical plate 12 or the second vertical plate 13.

[0037] In some embodiments, the fixing assembly 2 includes at least two bottom - plate fixing blocks 21 for fixing the welding valve 6 and a setscrew group 22 for abutting against the side surface of the welding valve 6. The bottom - plate fixing blocks 21 protrude from the bottom plate 11 and abut against the bottom of the welding valve 6. The setscrew group 22 is screwed to the third vertical plate 14. Among them, the two bottom - plate fixing blocks 21 are used to balance the thrust of the pressure - applying power assembly 3 on the second vertical plate 13. The setscrew group 22 is used to balance the thrust of the pressure - applying power assembly 3 on the first vertical plate 12. Preferably, the setscrew group 22 includes at least two setscrews.

[0038] In some embodiments, the fixing assembly 2 further includes a top plate 23 abutting against the top of the welding valve 6. The top plate 23 is detachably connected to the bottom plate 11 through fasteners. Preferably, the top plate 23 and the bottom plate 11 are fixed by bolts, used to clamp the welding valve 6 up and down and provide a certain frictional force to assist in balancing the thrust of the pressure - applying power assembly 3 on the first vertical plate 12 and the second vertical plate 13.

[0039] In some embodiments, the pressure - applying power assembly 3 includes a power member 31 and a movable vertical plate 32. The movable vertical plate 32 is detachably connected to the bracket 1. The power member 31 is installed on the movable vertical plate 32, and the transmission end of the power member 31 is connected to the pressure - testing blind plate 4. Preferably, the movable vertical plate 32 is detachably connected to the rail groove 15 through a bolt pair. The power member 31 is a hydraulic jack or an electric jack.

[0040] In some embodiments, the pressure - testing device for the welding valve further includes a plurality of wheels 5, and the plurality of wheels 5 are installed at the bottom of the bracket 1. This facilitates the portable movement of the entire pressure - testing device.

[0041] The method of using the utility model is to place the welding valve 6 between the top plate 23 and the bottom plate 11, use the bottom plate fixing block 21 to support the bottom surface of the welding valve 6, and then adjust the movable vertical plate 32 on the second vertical plate 13 to drive the power member 31 and the pressure test blind plate 4 so that the sealing member 42 is centered against the end surface of the welding groove 61, and then adjust the top screw group 22 on the third vertical plate 14 and the movable vertical plate 32 on the first vertical plate 12 to center and fix them, and then start the two power members 31 respectively to provide sufficient clamping thrust to ensure that the welding groove 61 can be strictly sealed, and finally according to the pressure test requirements, the water injection ports of the two pressure test blind plates 4 are respectively injected or blocked, and the valve pressure test is completed after the water injection and pressure increase.

[0042] By implementing the utility model, the following beneficial effects are achieved:

[0043] The pressure testing device for welding valves of the utility model supports and fixes the welding valve 6 through a bracket 1 and a fixing assembly 2. The pressure-applying power assembly 3 is installed on the bracket 1. The pressure-applying power assembly 3 can drive the pressure-testing blind plate 4 to approach or move away from the welding groove 61. During the pressure test, the pressure-testing blind plate 4 abuts against the welding groove 61. The pressure-applying power assembly 3 provides sufficient sealing force. After the pressure test is completed, there is no need to cut or disassemble. The overall structure is simple, the operation is convenient, and the working efficiency is high.

[0044] It can be understood that the above embodiments only express the preferred implementation methods of the utility model, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the patent scope of the utility model; it should be pointed out that for ordinary technicians in this field, without departing from the concept of the utility model, the above embodiments or technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the utility model, that is, the embodiments described in "some embodiments" can be freely combined with any of the above and below embodiments; therefore, all equivalent changes and modifications made to the scope of the claims of the utility model should fall within the scope of the claims of the utility model.

Claims

1. A pressure test device for a welded valve, characterized in that, including a bracket (1); a fixing component (2) for fixedly connecting and welding a valve (6), connected to the bracket (1); two pressure application power components (3), arranged opposite to two welding grooves (61) of the welding valve (6) and respectively installed and fixed on the bracket (1); two pressure test blind plates (4) for abutting against the two welding grooves (61), each pressure test blind plate (4) being connected to the transmission end of the pressure application power component (3); the pressure test blind plate (4) is provided with a water injection channel (43), the water injection channel (43) penetrates through the pressure test blind plate (4) and both ends of the water injection channel (43) are respectively externally connected to a water source and communicated with the welding groove (61).

2. The pressure test device for the welded valve according to claim 1, characterized in that, The pressure test blind plate (4) includes a pressure bearing block (41) and a seal (42), the pressure bearing block (41) is connected to the transmission end of the pressure application power component (3), and the seal (42) is detachably connected to the pressure bearing block (41); the water inlet end of the water injection channel (43) penetrates through the pressure bearing block (41) to be externally connected to a water source, and the water injection end of the water injection channel (43) penetrates through the seal (42) and is communicated with the welding groove (61); The seal (42) is provided with a sealing surface (421), the sealing surface (421) abuts against the end surface of the welding groove (61), and the size of the sealing surface (421) is greater than or equal to the size of the end surface of the welding groove (61).

3. The pressure test device for a welded valve according to claim 2, characterized in that, The sealing surface (421) is in a horn shape.

4. The pressure test device for the welded valve according to claim 1, wherein The bracket (1) includes a bottom plate (11) for placing the welding valve (6), a first vertical plate (12) connected to one of the pressure application power components (3), a second vertical plate (13) connected to the other pressure application power component (3), and a third vertical plate (14) connected to the side surface of the welding valve (6) through the fixing component (2). The first vertical plate (12), the second vertical plate (13), and the third vertical plate (14) are sequentially connected to form a U-shaped structure and are respectively connected and fixed to the bottom plate (11).

5. The pressure test device for a welded valve according to claim 4, wherein, Two mutually parallel rail grooves (15) are provided on the first vertical plate (12) and / or the second vertical plate (13), and the pressure application power component (3) is detachably connected to the two rail grooves (15) through fasteners.

6. The pressure test device for a welded valve according to claim 4, characterized in that, The fixing component (2) includes at least two bottom plate fixing blocks (21) for fixing the welding valve (6) and a set of set screws (22) for abutting against the side surface of the welding valve (6). The bottom plate fixing blocks (21) protrude from the bottom plate (11) and abut against the bottom of the welding valve (6), and the set screw group (22) is screwed to the third vertical plate (14).

7. The pressure testing device for a welded valve according to claim 6, characterized in that, The fixing component (2) further includes a top plate (23) abutting against the top of the welding valve (6), and the top plate (23) is detachably connected to the bottom plate (11) through fasteners.

8. The pressure test device for a welded valve according to claim 1, characterized in that, The pressure application power assembly (3) includes a power member (31) and a movable vertical plate (32). The movable vertical plate (32) is detachably connected to the bracket (1). The power member (31) is installed on the movable vertical plate (32), and the transmission end of the power member (31) is connected to the pressure test blind plate (4).

9. The pressure testing device for a welded valve according to claim 8, characterized in that, The power member (31) is a hydraulic jack or an electric jack.

10. The pressure test device for the welded valve according to any one of claims 1-9, characterized in that, The pressure test device for the welded valve further includes a plurality of wheels (5), and the plurality of wheels (5) are installed at the bottom of the bracket (1).

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