Anti-locking valve pressure test device

Abstract

The utility model relates to an anti-locking valve pressure testing device which comprises a base, a first support, a second support and a driving assembly are arranged on the base, a guide rod is arranged between the first support and the second support, a movable housing is arranged on the guide rod in a sliding mode, and the driving assembly is located at the end, away from the first support, of the second support. The second support is provided with a lead screw nut pair mechanism, one end of the lead screw nut pair mechanism is connected with the movable memorial archway, the other end of the lead screw nut pair mechanism is connected with the driving end of the driving assembly, the first support and the movable memorial archway are each provided with a balance cylinder, and the two balance cylinders are oppositely arranged. The balance cylinder comprises a cylinder body and a plurality of piston assemblies annularly arranged at intervals along the axis of the cylinder body, each piston assembly comprises a piston and two symmetrically-arranged stop blocks, the pistons are connected with the cylinder body, the stop blocks are located on the outer sides of the pistons, and the side faces of the stop blocks protrude out of the side faces of the pistons. The device not only can prevent the occurrence of a jamming condition, but also improves the use efficiency and prolongs the use period.

Description

Technical Field

[0001] The utility model relates to the technical field of valve pressure testing machines, in particular to a valve pressure testing device capable of preventing jamming. 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 valve seat sealing performance 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. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a valve pressure testing device for preventing jamming, which can not only prevent the occurrence of jamming, but also improve the use efficiency and the use cycle.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a valve pressure testing device to prevent sticking, including a base, a first bracket, a second bracket and a driving assembly are arranged on the base, a guide rod is arranged between the first bracket and the second bracket, a mobile arch is slidably arranged on the guide rod, the driving assembly is located at one end of the second bracket away from the first bracket, a screw-nut sub-mechanism is arranged on the second bracket, one end of the screw-nut sub-mechanism is connected to the mobile arch, and the other end of the screw-nut sub-mechanism is connected to the driving end of the driving assembly, and the first bracket and the mobile arch are respectively provided with balancing cylinders for clamping and pressure testing the valve, and the two balancing cylinders are arranged opposite to each other.

[0006] The balancing cylinder includes a cylinder body and a plurality of piston assemblies arranged at annular intervals along the axis of the cylinder body. The piston assembly includes a piston and two symmetrically arranged blocking blocks. The piston is connected to the cylinder body. The blocking blocks are located on the outside of the piston. The blocking blocks protrude away from the side of the cylinder body and the piston is away from the side of the cylinder body.

[0007] In one of the embodiments, the piston of the anti-stuck valve pressure testing device includes a protrusion and a clamping portion, and the cylinder body is provided with a plurality of grooves for accommodating the protrusion of the piston at annular intervals along the axis, and the clamping portion of the piston is located on the outside of the cylinder body.

[0008] In one of the embodiments, the blocking block of the anti-stuck valve pressure testing device protrudes away from the side of the cylinder body by a distance of 2-4 mm from the side of the piston away from the cylinder body.

[0009] In one of the embodiments, a through hole for the flow of the test medium is provided at the axial center position of the cylinder body of the anti-stuck valve pressure testing device.

[0010] In one of the embodiments, the driving assembly of the anti-stuck valve pressure testing device includes a motor, a first gear and a second gear. The driving end of the motor is connected to the first gear, the first gear is meshed with the second gear, and the second gear is sleeved on the screw-nut pair mechanism. The motor is used to drive the first gear to drive the second gear to rotate, and the second gear drives the screw-nut pair mechanism to rotate.

[0011] In one of the embodiments, two bracket assemblies for supporting the valve are slidably disposed on the base of the anti-stuck valve pressure testing device.

[0012] In one of the embodiments, the bracket assembly of the anti-stuck valve pressure testing device 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.

[0013] The beneficial effects of this application are:

[0014] The present application provides a valve pressure test device for preventing jamming. The balance cylinder of the device is provided with a plurality of independent pistons at intervals along the axis of the cylinder body in an arc shape, and blocking blocks are symmetrically arranged on the outer side of the pistons. The side of the blocking blocks protrudes from the side of the pistons. The blocking blocks cooperate with the pistons to prevent the valve from being jammed when the balance cylinder performs a pressure test on the tested valve. The valve pressure test device for preventing jamming can not only prevent the occurrence of jamming, but also improve the use efficiency and use cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of a valve pressure testing device for preventing sticking according to an embodiment of the present application;

[0016] Figure 2 A schematic diagram of a balancing cylinder of a valve pressure testing device for preventing sticking according to an embodiment of the present application;

[0017] Figure 3 An exploded view of a balance cylinder of a valve pressure testing device for preventing sticking according to an embodiment of the present application;

[0018] Figure 4 A cross-sectional view of a balancing cylinder of a valve pressure testing device for preventing sticking according to an embodiment of the present application;

[0019] Figure 5 A schematic diagram of a base and a bracket assembly of an anti-stuck valve pressure testing device according to an embodiment of the present application;

[0020] in:

[0021] 1. Base; 2. First bracket; 3. Second bracket; 4. Driving assembly; 5. Guide rod; 6. Moving arch; 7. Screw nut sub-mechanism; 8. Balance cylinder; 9. Bracket assembly; 10. Valve; 41. Motor; 42. First gear; 43. Second gear; 81. Cylinder body; 821. Piston; 822. Blocking block; 811. Groove; 812. Through hole; 001. Protrusion; 002. Pressing part; 91. Bracket; 92. Roller seat. DETAILED DESCRIPTION

[0022] 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.

[0023] like Figure 1 As shown, an embodiment of the present application provides an anti-stuck valve pressure testing device, including a base 1, on which a first bracket 2, a second bracket 3 and a driving assembly 4 are arranged, a guide rod 5 is arranged between the first bracket 2 and the second bracket 3, a movable arch 6 is slidably arranged on the guide rod 5, the driving assembly 4 is located at the end of the second bracket 3 away from the first bracket 2, a screw-nut sub-mechanism 7 is arranged on the second bracket 3, one end of the screw-nut sub-mechanism 7 is connected to the movable arch 6, and the other end of the screw-nut sub-mechanism 7 is connected to the driving end of the driving assembly 4, and the first bracket 2 and the movable arch 6 are respectively provided with a balancing cylinder 8 for clamping and pressure testing the valve 10, and the two balancing cylinders 8 are arranged opposite to each other.

[0024] like Figure 2-Figure 4 As shown, the balancing cylinder 8 includes a cylinder body 81 and a plurality of piston assemblies arranged at annular intervals along the axis of the cylinder body 81, the piston assembly includes a piston 821 and two symmetrically arranged blocking blocks 822, the piston 821 is connected to the cylinder body 81, the blocking blocks 822 are located on the outside of the piston 821, and the blocking blocks 822 protrude away from the side of the cylinder body 81 and the side of the piston 821 away from the cylinder body 81.

[0025] Specifically, three pistons 821 are arranged at intervals along the axis of the cylinder body 81 of the balancing cylinder 8, one end of the piston 821 is located in the groove 811 of the cylinder body 81, and the other end of the piston 821 is located outside the cylinder body 81. Two blocking blocks 822 are symmetrically arranged outside the piston 821. The piston 821 and the blocking block 822 are respectively connected to the cylinder body 81 by bolts, and the side of the blocking block 822 protrudes 3mm from the side of the piston 821. One end of the screw of the screw nut sub-mechanism 7 is fixedly connected to the moving arch 6, and the nut of the screw nut sub-mechanism 7 is connected to the driving end of the driving mechanism. The nut part is rotatably installed in the second bracket 3, and the screw can move forward and backward along the nut.

[0026] First, the two balancing cylinders 8 are relatively fixed on the first bracket 2 and the movable arch 6, and the valve 10 to be tested is placed on the bracket assembly 9, so that the two ends of the valve 10 to be tested correspond to the two balancing cylinders 8 respectively, and then the driving assembly 4 drives the screw nut sub-mechanism 7 to drive the movable arch 6 to move along the guide rod 5 toward the valve 10 to be tested. When the valve 10 to be tested is clamped in the two balancing cylinders 8, the blocking block 822 of the protruding piston 821 is pressed on the valve 10 to be tested and deformed by about 1mm. At this time, water is injected into the valve 10 to apply pressure. Under the action of the water pressure, the piston 821 moves forward by 2mm to press the valve 10, so that there is a gap of about 2mm between the piston 821 and the cylinder body 81. When the pressure is released, due to the gap between the piston 821 and the cylinder body 81, the piston 821 retreats, which can prevent the piston 821 from being stuck on the valve 10 to be tested.

[0027] In the above structure, multiple independent pistons 821 and blocking blocks 822 are arranged on the cylinder body 81 of the balancing cylinder 8, and the pistons 821 and the blocking blocks 822 are used in cooperation, so that the valve 10 will not be stuck during the pressure relief process. The anti-stuck valve pressure testing device can not only prevent the occurrence of stuck situations, but also improve the use efficiency and service life.

[0028] like Figure 3 As shown, in one embodiment, the piston 821 of the anti-stuck valve pressure testing device includes a protrusion 001 and a clamping portion 002, and the cylinder body 81 is provided with a plurality of grooves 811 for accommodating the protrusion 001 of the piston 821 at an axial annular interval, and the clamping portion 002 of the piston 821 is located on the outer side of the cylinder body 81.

[0029] Specifically, three grooves 811 are arranged at intervals along the axis arc on the cylinder body 81, so that the protrusions 001 of the three pistons 821 are respectively located in the three grooves 811, and the pressing part 002 is located outside the groove 811, and the pressing part is connected to the cylinder body 81 through multiple bolts. This arrangement facilitates the fixing of the cylinder body 81 and the piston 821.

[0030] like Figure 4 As shown, in one embodiment, the distance that the blocking block 822 of the anti-stuck valve pressure test device protrudes from the side of the cylinder body 81 and the piston 821 is away from the side of the cylinder body 81 is 2-4 mm. The distance that the side of the blocking block 822 protrudes from the side of the piston 821 is 2 mm, 3 mm and 4 mm, preferably 3 mm. This setting is convenient for leaving a gap between the piston 821 and the cylinder body 81 during pressurization and pressure relief, ensuring that there will be no jamming after pressure relief.

[0031] like Figure 3As shown, in one embodiment, a through hole 812 for the flow of test medium is provided at the axial center position of the cylinder 81 of the anti-stuck valve pressure test device. The through hole 812 facilitates the flow of test medium into and out of the tested valve 10 to pressurize and release pressure.

[0032] like Figure 1 As shown, in one embodiment, the driving assembly 4 of the anti-stuck valve pressure test device includes a motor 41, a first gear 42 and a second gear 43. The driving end of the motor 41 is connected to the first gear 42, the first gear 42 is meshed with the second gear 43, the second gear 43 is sleeved on the screw nut pair mechanism 7, the motor 41 is used to drive the first gear 42 to drive the second gear 43 to rotate, and the second gear 43 drives the screw nut pair mechanism 7 to rotate. The second gear 43 is sleeved on the screw of the screw nut pair mechanism 7 and is fixedly connected to one end of the nut, the second gear 43 is meshed with the first gear 42, the motor 41 drives the first gear 42 to rotate, the first gear 42 drives the second gear 43 to rotate, the second gear 43 drives the nut to rotate, and the nut drives the screw and the rotating arch to move forward and backward. This arrangement facilitates the driving screw to drive the rotating arch to move forward and backward along the guide rod 5.

[0033] like Figure 5 As shown, in one embodiment, two bracket assemblies 9 for supporting the valve 10 are slidably arranged on the base 1 of the anti-stuck valve pressure test device. The support position can be adjusted according to the size and specification of the tested valve 10. This arrangement facilitates the support of the tested valve 10.

[0034] like Figure 5 As shown, in one embodiment, the bracket assembly 9 of the anti-stuck valve pressure test device includes a bracket 91 and a roller seat 92 with a brake, the bracket 91 is installed on the roller seat 92, the base 1 is provided with a slide rail, and the roller seat 92 rolls with the slide rail. The bottom of the roller seat 92 slides with the slide rail of the base 1, the bracket 91 is fixedly connected to the top of the roller seat 92, and the bracket 91 supports the valve 10 to be tested. This setting can adjust the support distance of the two brackets 91 according to the size of the valve 10 to be tested.

[0035] 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 valve pressure test device for preventing stuck, characterized in that: The invention comprises a base (1), wherein a first bracket (2), a second bracket (3) and a driving assembly (4) are arranged on the base (1), a guide rod (5) is arranged between the first bracket (2) and the second bracket (3), a movable archway (6) is slidably arranged on the guide rod (5), the driving assembly (4) is located at an end of the second bracket (3) away from the first bracket (2), a screw nut sub-mechanism (7) is arranged on the second bracket (3), one end of the screw nut sub-mechanism (7) is connected to the movable archway (6), and the other end of the screw nut sub-mechanism (7) is connected to the driving end of the driving assembly (4), and the first bracket (2) and the movable archway (6) are respectively provided with a balancing cylinder (8) for clamping and pressure testing the valve (10), and the two balancing cylinders (8) are arranged opposite to each other. The balancing cylinder (8) comprises a cylinder body (81) and a plurality of piston assemblies arranged at annular intervals along the axis of the cylinder body (81); the piston assembly comprises a piston (821) and two symmetrically arranged blocking blocks (822); the piston (821) is connected to the cylinder body (81); the blocking blocks (822) are located on the outside of the piston (821); the blocking blocks (822) protrude from the side of the piston (821) away from the cylinder body (81) and away from the side of the cylinder body (81).

2. The anti-stuck valve pressure testing device according to claim 1, characterized in that: The piston (821) comprises a protruding portion (001) and a pressing portion (002); the cylinder body (81) is provided with a plurality of grooves (811) at annular intervals along the axis for accommodating the protruding portion (001) of the piston (821); and the pressing portion (002) of the piston (821) is located on the outside of the cylinder body (81).

3. The anti-stuck valve pressure testing device according to claim 1, characterized in that: The distance that the blocking block (822) protrudes away from the side of the cylinder body (81) and the distance that the piston (821) protrudes away from the side of the cylinder body (81) is 2-4 mm.

4. The anti-stuck valve pressure testing device according to claim 1, characterized in that: A through hole (812) for the flow of the test medium is provided at the axial center of the cylinder (81).

5. The anti-stuck valve pressure testing device according to claim 1, characterized in that: The driving assembly (4) comprises a motor (41), a first gear (42) and a second gear (43); the driving end of the motor (41) is connected to the first gear (42); the first gear (42) is meshed with the second gear (43); the second gear (43) is sleeved on the screw nut pair mechanism (7); the motor (41) is used to drive the first gear (42) to drive the second gear (43) to rotate; and the second gear (43) drives the screw nut pair mechanism (7) to rotate.

6. The anti-stuck valve pressure testing device according to claim 1, characterized in that: Two bracket assemblies (9) for supporting the valve (10) are slidably arranged on the base (1).

7. The anti-stuck valve pressure testing device according to claim 6, characterized in that: The bracket assembly (9) comprises a bracket (91) and a roller seat (92) with a brake, the bracket (91) is mounted on the roller seat (92), a slide rail is arranged on the base (1), and the roller seat (92) and the slide rail are in rolling cooperation.

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