Screw pressure testing device capable of adjusting balance cylinder

Abstract

The utility model relates to a screw pressure testing device capable of adjusting a balance cylinder, which comprises a base, a first fixed memorial archway, a second fixed memorial archway and a driving mechanism are arranged on the base, a guide rod is arranged between the first fixed memorial archway and the second fixed memorial archway, and a movable memorial archway is arranged on the guide rod in a sliding manner. The driving end of the driving mechanism penetrates through the second fixed archway to be connected with the movable archway, balance cylinders are oppositely arranged on the first fixed archway and the movable archway respectively, each balance cylinder comprises a cylinder body, a piston and a blind plate, the piston is installed in a groove of the cylinder body, one end of the piston is connected with the blind plate, a first step is arranged on the outer ring of the blind plate, and a second step is arranged on the outer ring of the first step. A plurality of adjusting jackscrews are arranged between the first step and the cylinder body, one end of each adjusting jackscrew abuts against the first step of the blind plate, and the other end of each adjusting jackscrew is in threaded connection with the cylinder body. The screw pressure testing device can easily solve the problem that the valve is stuck, the processing time and the labor cost are saved, and the service life of the device is prolonged at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of screw pressure testing devices, in particular to a screw pressure testing device with an adjustable balancing cylinder. Background Art

[0002] Among traditional valve pressure testing machines, the screw pressure testing device has become the preferred equipment for valve pressure testing due to its advantages such as simple operation, easy use, and no impact on the sealing performance of the valve seat during pressure testing.

[0003] Since the screw pressure test device is a self-locking structure and cannot provide continuous pushing force, it needs to be used with a balancing cylinder. The balancing cylinder is used to hold both ends of the valve for pressure testing. After pressurization and pressure relief, the existing balancing cylinder is prone to getting stuck, and the screw cannot drive the balancing cylinder at one end to retreat, resulting in the inability to remove the tested valve. It is necessary to manually use a jack or a crane to forcefully rotate the gear to drive the screw backward to solve the problem of the inability to remove the tested valve. This method is time-consuming and labor-intensive and also affects the service life of the equipment. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a screw pressure testing device with an adjustable balancing cylinder. The screw pressure testing device adopts an adjustable balancing cylinder to easily solve the problem of valve jamming, saving processing time and labor costs, and also improving the service life of the equipment.

[0005] The utility model adopts the following technical solution to solve the technical problem: a screw pressure testing device with an adjustable balancing cylinder, comprising a base, on which a first fixed arch, a second fixed arch and a driving mechanism are arranged, a guide rod is arranged between the first fixed arch and the second fixed arch, a mobile arch is slidably arranged on the guide rod, the driving mechanism is installed on the base and is located on one side of the second fixed arch, the driving end of the driving mechanism passes through the second fixed arch and is connected to the mobile arch, and the first fixed arch and the mobile arch are respectively provided with balancing cylinders for clamping the valve, and the two balancing cylinders are arranged opposite to each other.

[0006] The balancing cylinder includes a cylinder body, a piston and a blind plate. A groove for accommodating the piston is provided in the cylinder body. The piston is installed in the groove of the cylinder body. One end of the piston away from the cylinder body is connected to the blind plate. A first step is provided on the outer ring of the blind plate. A plurality of adjusting screws for adjusting the distance between the piston and the cylinder body are provided between the first step and the cylinder body. One end of the adjusting screw is against the first step of the blind plate, and the other end of the adjusting screw is threadedly connected to the cylinder body.

[0007] In one of the embodiments, the distance between the piston and the cylinder body of the screw pressure testing device of the adjustable balancing cylinder is 2-10 mm.

[0008] In one of the embodiments, the cylinder body of the screw pressure testing device of the adjustable balancing cylinder is provided with a plurality of second steps along the axial arc, and the piston is provided with a plurality of protruding ends which are matched one by one with the second steps along the axial arc.

[0009] In one of the embodiments, a first through hole is provided on the piston of the screw pressure test device of the adjustable balancing cylinder, a plurality of connecting parts are provided in the circumferential direction in the first through hole, the connecting parts are connected to the cylinder body through a first bolt, and a third through hole is provided on the blind plate, the position of the third through hole corresponds to that of the first through hole, and the third through hole has the same diameter as that of the first through hole.

[0010] In one embodiment, a second through hole for passing the test medium is provided on the cylinder body of the screw pressure test device of the adjustable balancing cylinder, the second through hole corresponds to the first through hole of the piston, and the diameter of the second through hole is smaller than the diameter of the first through hole.

[0011] In one of the embodiments, the driving mechanism of the screw pressure testing device of the adjustable balancing cylinder includes a motor and a screw-nut pair mechanism, the screw-nut pair mechanism is installed in the second fixed arch, one end of the screw-nut pair mechanism is connected to the movable arch, and the other end of the screw-nut pair mechanism is connected to the driving end of the motor through a gear assembly.

[0012] In one of the embodiments, two bracket assemblies for supporting the valve are slidably disposed on the base of the screw pressure testing device of the adjustable balancing cylinder.

[0013] In one of the embodiments, the bracket assembly of the screw pressure testing device of the adjustable balancing cylinder includes a bracket and a roller seat with a brake, the bracket is installed on the roller seat, a slide rail is provided on the base, and the roller seat and the slide rail are in rolling cooperation.

[0014] The beneficial effects of this application are:

[0015] The present application provides a screw pressure test device for an adjustable balancing cylinder. The screw pressure test device sets an adjustment screw between the cylinder body and the blind plate of the balancing cylinder. The adjustment screw is adjusted by a wrench in the prior art, so that the blind plate drives the piston to move backward to remove the pre-tightening force of the valve under the pressure, and the valve is loosened, so that the tested valve can be taken out. The screw pressure test device for an adjustable balancing cylinder adopts an adjustable balancing cylinder, which can easily solve the problem of valve jamming, greatly reducing the labor intensity and time of maintenance engineers, and also improving the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of a screw pressure testing device for an adjustable balancing cylinder according to an embodiment of the present application;

[0017] Figure 2A schematic diagram of a balancing cylinder of a screw pressure testing device of an adjustable balancing cylinder according to an embodiment of the present application;

[0018] Figure 3 An exploded view of a balancing cylinder of a screw pressure testing device of an adjustable balancing cylinder according to an embodiment of the present application;

[0019] Figure 4 A cross-sectional view of a balancing cylinder of a screw pressure testing device of an adjustable balancing cylinder according to an embodiment of the present application;

[0020] Figure 5 A schematic diagram of a piston of a screw pressure testing device of an adjustable balancing cylinder according to an embodiment of the present application;

[0021] Figure 6 A schematic diagram of a bracket assembly and a base of a screw pressure testing device for an adjustable balancing cylinder according to an embodiment of the present application;

[0022] in:

[0023] 1. Base; 2. First fixed arch; 3. Second fixed arch; 4. Driving mechanism; 5. Guide rod; 6. Movable arch; 7. Balance cylinder; 8. Bracket assembly; 71. Cylinder body; 72. Piston; 73. Blind plate; 74. Adjusting top screw; 711. Groove; 712. Second step; 713. Second through hole; 721. Raised end; 722. First through hole; 723. Connecting part; 724. First bolt; 731. First step; 732. Third through hole; 41. Motor; 42. Screw-nut sub-mechanism; 43. Gear assembly; 81. Bracket; 82. Roller seat; 11. Slide rail. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0025] like Figure 1 As shown, an embodiment of the present application provides a screw pressure testing device with an adjustable balancing cylinder, comprising a base 1, on which a first fixed arch 2, a second fixed arch 3 and a driving mechanism 4 are arranged, a guide rod 5 is arranged between the first fixed arch 2 and the second fixed arch 3, a movable arch 6 is slidably arranged on the guide rod 5, the driving mechanism 4 is installed on the base 1 and is located on one side of the second fixed arch 3, a driving end of the driving mechanism 4 passes through the second fixed arch 3 and is connected to the movable arch 6, and a balancing cylinder 7 for clamping the valve is respectively arranged on the first fixed arch 2 and the movable arch 6, and the two balancing cylinders 7 are arranged opposite to each other.

[0026] like Figure 2-Figure 4As shown, the balancing cylinder 7 includes a cylinder body 71, a piston 72 and a blind plate 73. The cylinder body 71 is provided with a groove 711 for accommodating the piston 72. The piston 72 is installed in the groove 711 of the cylinder body 71. The end of the piston 72 away from the cylinder body 71 is connected to the blind plate 73. The outer circle of the blind plate 73 is provided with a first step 731. A plurality of adjusting top screws 74 for adjusting the distance between the piston 72 and the cylinder body 71 are provided between the first step 731 and the cylinder body 71. One end of the adjusting top screw 74 is against the first step 731 of the blind plate 73, and the other end of the adjusting top screw 74 is threadedly connected to the cylinder body 71.

[0027] Specifically, the piston 72 is installed in the groove 711 of the cylinder body 71, and the piston 72 is connected to the cylinder body 71 through three first bolts 724. The end of the piston 72 away from the cylinder body 71 is connected to the blind plate 73 through three second bolts. Six adjusting top screws 74 are arranged in sequence along the circumference of the cylinder body 71. One end of the adjusting top screw 74 abuts against the first step 731 of the blind plate 73, and the other end of the adjusting top screw 74 is threadedly connected to the cylinder body 71. The adjusting top screw 74 is adjusted outwards by a wrench in the prior art, and the blind plate 73 drives the piston 72 to move, so that the interval between the piston 72 and the cylinder body 71 is about 6 mm. Among them, the adjusting top screw 74 is a hexagonal bolt, which can be used in conjunction with a hexagonal wrench in the prior art.

[0028] First, the two balancing cylinders 7 are relatively fixed on the first fixed arch 2 and the mobile arch 6, and the valve to be tested is placed on the two bracket assemblies 8. The driving mechanism 4 drives the balancing cylinder 7 of the mobile arch 6 to move along the guide rod 5, so that the valve to be tested is fixed between the balancing cylinder 7 of the mobile arch 6 and the balancing cylinder 7 of the first fixed arch 2. The valve to be tested is subjected to a pressure test. After the pressure is released, if the balancing cylinder 7 is stuck in the valve to be tested, the adjusting top screw 74 can be adjusted inwardly by a hexagonal wrench in the prior art, so that the blind plate 73 drives the piston 72 to move toward the cylinder body 71, and the pre-tightening force of the valve under the pressure is removed, and then the tested valve is taken out. After removal, the adjusting top screw 74 can be adjusted back to the appropriate position.

[0029] In the above structure, the valve is prevented from getting stuck after the test process by using an adjustable balancing cylinder 7. The screw pressure test device with an adjustable balancing cylinder is not only simple in structure, but also can easily solve the problem of valve getting stuck, greatly reducing the labor intensity and time of maintenance engineers, and at the same time increasing the service life of the equipment.

[0030] like Figure 4As shown, in one embodiment, the distance between the piston 72 and the cylinder body 71 of the screw pressure test device of the adjustable balancing cylinder is 2-10mm. The spacing distance between the piston 72 and the cylinder body 71 can be controlled at 2mm, 4mm, 6mm, 8mm or 10mm, preferably 6mm, by adjusting the top screw 74. When a jam occurs, the blind plate 73 and the piston 72 can be driven to move toward the cylinder body 71 by adjusting the top screw 74 with a wrench, and the pre-tightening force of the valve under the action of pressure can be removed, and the valve can be taken out. The setting of the reserved gap increases the space for adjusting the distance between the blind plate 73 and the valve.

[0031] like Figure 3-Figure 5 As shown, in one embodiment, the cylinder body 71 of the screw pressure test device of the adjustable balancing cylinder is provided with a plurality of second steps 712 along the axial arc, and the piston 72 is provided with a plurality of raised ends 721 along the axial arc that are matched one by one with the second steps 712. Three second steps 712 are provided along the axial arc of the cylinder body 71, and three raised ends 721 are provided on the piston 72, and the three raised ends 721 are respectively matched one by one with the three second steps 712. This arrangement facilitates the coordinated use of the cylinder body 71 and the piston 72.

[0032] like Figure 3 As shown, in one embodiment, a first through hole 722 is provided on the piston 72 of the screw pressure test device of the adjustable balancing cylinder, and a plurality of connecting parts 723 are provided in the circumferential direction in the first through hole 722. The connecting part 723 is connected to the cylinder body 71 through a first bolt 724. A third through hole 732 is provided on the blind plate 73. The third through hole 732 corresponds to the position of the first through hole 722, and the third through hole 732 has the same diameter as the first through hole 722. Three connecting parts 723 are provided on the first through hole 722 of the piston 72, and the three connecting parts 723 are respectively connected to one end of the cylinder body 71 close to the second through hole 713 through a first bolt 724. The first through hole 722 corresponds to the third through hole 732 and has the same size. The setting of the connecting part 723 facilitates the connection between the piston 72 and the cylinder body 71. The setting of the first through hole 722 and the third through hole 732 facilitates the flow of the test medium.

[0033] like Figure 3 As shown, in one embodiment, a second through hole 713 for passing the test medium is provided on the cylinder body 71 of the screw pressure test device of the adjustable balancing cylinder, and the second through hole 713 corresponds to the first through hole 722 of the piston 72, and the diameter of the second through hole 713 is smaller than the diameter of the first through hole 722. The diameter of the second through hole 713 is smaller than the first through hole 722. This arrangement cooperates with the first through hole 722 and the third through hole 732 to facilitate the pressure test of the test medium flowing into and out of the valve.

[0034] like Figure 1As shown, in one embodiment, the driving mechanism 4 of the screw pressure test device of the adjustable balancing cylinder includes a motor 41 and a screw-nut sub-mechanism 42, the screw-nut sub-mechanism 42 is installed in the second fixed arch 3, one end of the screw-nut sub-mechanism 42 is connected to the movable arch 6, and the other end of the screw-nut sub-mechanism 42 is connected to the driving end of the motor 41 through a gear assembly 43.

[0035] Specifically, the gear assembly 43 includes a first gear and a second gear, the first gear meshes with the second gear, the second gear is sleeved on the screw nut pair mechanism 42 and fixedly connected to the nut of the screw nut pair mechanism 42, and the first gear is connected to the driving end of the motor 41. The screw nut pair mechanism 42 includes a screw and a nut, the nut is sleeved on the screw and threadedly connected to the screw, the nut is rotationally matched with the second fixed arch 3, and the screw passes through the second fixed arch 3 and is fixedly connected to the mobile arch 6. The motor 41 drives the first gear to rotate, the first gear drives the second gear to rotate, the second gear drives the nut to rotate, the nut drives the screw to move forward and backward, and the screw drives the mobile arch 6 to move forward and backward along the guide rod 5.

[0036] This arrangement facilitates driving the movable arch 6 to drive the balance cylinder 7 to move forward and backward to clamp and release the valve.

[0037] like Figure 5 As shown, in one embodiment, two bracket assemblies 8 for supporting the valve are slidably arranged on the base 1 of the screw pressure test device of the adjustable balancing cylinder. The arrangement of the two bracket assemblies 8 facilitates the support of the valve and can prevent the valve from falling during the pressure test.

[0038] like Figure 5 As shown, in one embodiment, the bracket assembly 8 of the screw pressure test device of the adjustable balancing cylinder includes a bracket 81 and a roller seat 82 with a brake, the bracket 81 is installed on the roller seat 82, the base 1 is provided with a slide rail 11, and the roller seat 82 and the slide rail 11 are rollingly matched. The bracket 81 is fixedly mounted on the roller seat 82, and the roller of the roller seat 82 is slidingly matched with the slide rail 11 of the base 1. This setting facilitates the adjustment of the support position between the roller seats 82 according to the specifications of the valve.

[0039] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A screw pressure test device with an adjustable balancing cylinder, characterized in that: The invention comprises a base (1), a first fixed archway (2), a second fixed archway (3) and a driving mechanism (4) are arranged on the base (1), a guide rod (5) is arranged between the first fixed archway (2) and the second fixed archway (3), a movable archway (6) is slidably arranged on the guide rod (5), the driving mechanism (4) is installed on the base (1) and is located on one side of the second fixed archway (3), a driving end of the driving mechanism (4) passes through the second fixed archway (3) and is connected to the movable archway (6), the first fixed archway (2) and the movable archway (6) are respectively provided with a balancing cylinder (7) for clamping the valve, and the two balancing cylinders (7) are arranged opposite to each other. The balancing cylinder (7) comprises a cylinder body (71), a piston (72) and a blind plate (73); a groove (711) for accommodating the piston (72) is arranged in the cylinder body (71); the piston (72) is installed in the groove (711) of the cylinder body (71); one end of the piston (72) away from the cylinder body (71) is connected to the blind plate (73); a first step (731) is arranged on the outer ring of the blind plate (73); a plurality of adjusting screws (74) for adjusting the distance between the piston (72) and the cylinder body (71) are arranged between the first step (731) and the cylinder body (71); one end of the adjusting screw (74) abuts against the first step (731) of the blind plate (73); and the other end of the adjusting screw (74) is threadedly connected to the cylinder body (71).

2. The screw pressure testing device of the adjustable balancing cylinder according to claim 1 is characterized in that: The distance between the piston (72) and the cylinder (71) is 2-10 mm.

3. The screw pressure testing device of the adjustable balancing cylinder according to claim 1 is characterized in that: The cylinder body (71) is provided with a plurality of second steps (712) along the axial arc, and the piston (72) is provided with a plurality of protruding ends (721) which are matched one by one with the second steps (712) along the axial arc.

4. The screw pressure testing device of the adjustable balancing cylinder according to claim 1 is characterized in that: The piston (72) is provided with a first through hole (722), a plurality of connecting parts (723) are provided in the first through hole (722) along the circumferential direction, the connecting parts (723) are connected to the cylinder body (71) via a first bolt (724), and the blind plate (73) is provided with a third through hole (732), the position of the third through hole (732) corresponds to the position of the first through hole (722), and the third through hole (732) and the first through hole (722) have the same diameter.

5. The screw pressure testing device of the adjustable balancing cylinder according to claim 4 is characterized in that: The cylinder body (71) is provided with a second through hole (713) for passing the test medium, the second through hole (713) corresponds to the first through hole (722) of the piston (72), and the diameter of the second through hole (713) is smaller than the diameter of the first through hole (722).

6. The screw pressure testing device of the adjustable balancing cylinder according to claim 1, characterized in that: The driving mechanism (4) comprises a motor (41) and a screw-nut sub-mechanism (42); the screw-nut sub-mechanism (42) is installed in the second fixed archway (3); one end of the screw-nut sub-mechanism (42) is connected to the movable archway (6); and the other end of the screw-nut sub-mechanism (42) is connected to the driving end of the motor (41) via a gear assembly (43).

7. The screw pressure testing device of the adjustable balancing cylinder according to claim 1, characterized in that: Two bracket assemblies (8) for supporting the valve are slidably arranged on the base (1).

8. The screw pressure testing device of the adjustable balancing cylinder according to claim 7, characterized in that: The bracket assembly (8) comprises a bracket (81) and a roller seat (82) with a brake, the bracket (81) is mounted on the roller seat (82), a slide rail (11) is arranged on the base (1), and the roller seat (82) and the slide rail (11) are in rolling cooperation.

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