Water pressure test device for valve positioner shell

Abstract

The utility model provides a water pressure test device for a valve positioner shell. The water pressure test device comprises a rack, a positioning table, a portal frame, a pressing assembly and a water inlet assembly, the positioning table is arranged on the working surface of the rack and is provided with a water inlet channel; the portal frame is arranged above the positioning table; the pressing assembly comprises an air cylinder, a pressing block, a buffer piece and a sensor, the air cylinder is arranged at the top of the portal frame, the driving end of the air cylinder faces downwards, the pressing block is arranged at the driving end of the air cylinder, the buffer piece is arranged on the pressing block in a sleeving mode, and the sensor is arranged on one side of the air cylinder and used for sensing the position of the shell; the water inlet assembly is arranged below the working face and connected with the water inlet channel. According to the utility model, the valve positioner shell is automatically pressed, manual operation is not needed, the testing efficiency is improved, and meanwhile, the sensor is used for judging whether the shell is placed in place or not, so that the pressure testing device can be matched with a mechanical arm, and automatic putting, testing and taking out of the shell are realized.

Description

Technical Field

[0001] The utility model relates to the technical field of shell pressure testing, in particular to a water pressure testing device for a valve positioner shell. Background Art

[0002] The valve positioner is an important control element, mainly used to accurately control the opening of the valve to meet the needs of industrial automation systems. The housing of the valve positioner is its key load-bearing part, and its quality and performance are directly related to the overall safety of the valve positioner. Pressure testing the housing of the valve positioner helps to ensure that the valve positioner can maintain stability and reliability under high pressure or harsh working environments.

[0003] Water pressure test is an effective means of pressure testing. It can simulate the pressure that the valve positioner may bear in the actual working environment, so as to detect the sealing performance and load-bearing capacity of its housing. During the test, by observing whether the housing leaks, it can be judged whether its sealing performance meets the standard; by observing whether the housing is cracked or deformed, its pressure resistance and structural strength can be evaluated.

[0004] The water pressure test devices used in the prior art are usually simple and rely on manual operation: the valve positioner housing is pressed by manually turning the handle, the water is controlled by manually opening and closing the cut-off valve, and the joint connectors need to be replaced to adapt to different housing joint conditions. The prior art is inconvenient to operate, has low test efficiency, and cannot adapt to complex housing conditions.

[0005] Therefore, it is necessary to improve the existing technology. Utility Model Content

[0006] The utility model provides a water pressure test device for a valve positioner housing, which is used to solve the above problem.

[0007] A technical solution adopted by the utility model is: to provide a water pressure test device for a valve positioner housing, comprising: a frame, a positioning platform, a gantry, a pressing assembly and a water inlet assembly;

[0008] The positioning platform is arranged on the working surface of the frame and is used for placing the valve positioner housing;

[0009] The working surface and the positioning platform have a water inlet channel for connecting the water inlet assembly;

[0010] The gantry is arranged on the working surface and is located above the positioning platform;

[0011] The clamping assembly includes a cylinder, a pressure block, a buffer and a sensor. The cylinder is arranged on the top of the gantry with the driving end facing downward. The pressure block is arranged at the driving end of the cylinder and is detachably connected. The buffer is sleeved on the pressure block to avoid damaging the shell. The sensor is arranged on one side of the cylinder to sense the position of the shell.

[0012] The water inlet assembly is arranged below the working surface and connected to the water inlet channel;

[0013] When the sensor senses the shell, the cylinder drives the pressure block to press the shell downward, and the water inlet assembly starts to perform a water pressure test on the shell.

[0014] Furthermore, the water inlet assembly includes a water inlet pipe, a pressure water pipe and a drain pipe, which are connected by an electric three-way valve, and the upper end of the pressure water pipe is connected to the water inlet channel.

[0015] Furthermore, a sealing gasket is also provided on the positioning platform, which plays a sealing role when the shell is pressed against the positioning platform.

[0016] Furthermore, the positioning platform is a cylindrical structure as a whole, and the bottom is embedded in the working surface of the frame. The embedded connection area is also cylindrical and is provided with a sealing ring.

[0017] Furthermore, a pair of alignment cylinders are provided in the positioning platform, and the driving ends of the alignment cylinders point to the water inlet channel and are provided with clips;

[0018] When the sensor senses the housing, the positioning cylinder is started first to drive the clip to approach and contact the joint of the valve positioner housing so that it is located in the center of the water inlet channel. Then the cylinder is started to drive the pressure block to press the housing downward, and finally the water inlet assembly is started for water pressure test.

[0019] Furthermore, the clamp has an arc-shaped concave surface for contacting and clamping the joint.

[0020] Furthermore, the pressing block is a pressing block with a flat lower surface or a pressing block with a clearance groove on the lower surface. When other electrical connectors are provided on the upper surface of the shell, replacing the pressing block with the clearance groove can avoid the electrical connector and press the shell.

[0021] The beneficial effects of the water pressure test device for the valve positioner housing of the utility model are:

[0022] 1. The cylinder and the sensor cooperate to automatically press the valve positioner housing, without manual operation, which improves the efficiency of the test. At the same time, the sensor is used to determine whether the housing is placed in place, so that the pressure test device can cooperate with the mechanical arm to realize the automatic placement, testing and removal of the housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1This is a front view of a water pressure test device for a valve positioner housing according to the first embodiment of the utility model;

[0024] Figure 2 It is a front view of the first embodiment of the utility model before the alignment structure is aligned;

[0025] Figure 3 It is a front view after the alignment structure is aligned in the first embodiment of the utility model;

[0026] Figure 4 It is a front view of the housing of the first embodiment of the utility model having other electrical connectors;

[0027] The components in the accompanying drawings are marked as follows: 1. frame, 2. positioning table, 3. gantry, 4. cylinder, 5. pressure block, 6. buffer, 7. sensor, 8. water inlet assembly, 9. shell, 21. water inlet channel, 22. aligning cylinder, 23. clip. DETAILED DESCRIPTION

[0028] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0029] In the description of the present invention, it should be understood that the terms "up", "down", "left", "right", "front", "back", "horizontal", "vertical", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention. They cannot indicate or imply that the components or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0030] See also Figures 1 to 4 The first embodiment of the utility model provides a pressure testing device for an intrinsically safe valve positioner housing 9, comprising: a frame 1, a positioning platform 2, a gantry 3, a pressing assembly and a water inlet assembly 8;

[0031] The bottom of the positioning platform 2 is embedded in the working surface of the frame 1 and is used to place the valve positioner housing 9;

[0032] The working surface and positioning platform 2 has a water inlet channel 21 arranged in a vertical direction, the diameter of which is larger than the diameter of the connector on the housing 9 of various valve positioners, so that the connector can be easily inserted into the upper port of the water inlet channel 21, and the lower port of the water inlet channel 21 is used to connect the water inlet assembly 8;

[0033] The gantry 3 is arranged on the working surface, above the positioning platform 2, and across the water inlet channel 21;

[0034] The clamping assembly includes a cylinder, a pressing block 5, a buffer 6 and a sensor 7. The cylinder is arranged on the top of the gantry 3, and the driving end points downward to the water inlet channel 21. The pressing block 5 is arranged at the driving end of the cylinder and is detachably connected. The buffer 6 is sleeved on the pressing block 5 to avoid damaging the housing 9. The sensor 7 is arranged on one side of the cylinder to sense the position of the housing 9.

[0035] The water inlet assembly 8 is arranged below the working surface, and includes a water inlet pipe, a pressure water pipe and a drainage pipe, which are connected by an electric three-way valve, and the upper end of the pressure water pipe is connected to the lower end of the water inlet channel 21;

[0036] When the sensor 7 senses the shell 9 , the cylinder drives the pressing block 5 to press the shell 9 downward, and the water inlet assembly 8 is started to perform a water pressure test on the shell 9 .

[0037] Specifically, no other electrical connectors are provided on the upper surface of the valve positioner housing 9 , and the pressing block 5 can be directly pressed against the housing 9 by using a pressing block 5 with a flat lower surface.

[0038] Specifically, the positioning platform 2 is a cylindrical structure as a whole. When the valve positioner housing 9 is placed on the positioning platform 2, it is only necessary to put the connector into the upper port of the water inlet channel 21. The housing 9 can be placed on the positioning platform 2 at any angle without complicated positioning actions.

[0039] Specifically, the area where the positioning platform 2 is embedded and connected to the working surface is also cylindrical and is provided with a sealing ring to ensure test safety.

[0040] Specifically, a sealing gasket is also provided on the positioning platform 2 , which plays a sealing role when the housing 9 is pressed against the positioning platform 2 .

[0041] A pair of aligning cylinders 22 are also provided in the positioning platform 2. The aligning cylinders 22 are placed horizontally, with their driving ends pointing toward the water inlet channel 21 and provided with clips 23.

[0042] The clamping piece 23 has an arc-shaped concave surface and is made of rubber material, which can gently contact and clamp the joint;

[0043] When the sensor 7 senses the housing 9, the positioning cylinder 22 is first started to drive the clip 23 to approach and contact the joint of the valve positioner housing 9 so that it is located in the center of the water inlet channel 21, and then the cylinder is started to drive the pressure block 5 to press the housing 9 downward, and finally the water inlet assembly 8 is started to perform a water pressure test.

[0044] See also Figure 4 In the second embodiment of the utility model, an electrical connector is provided on the upper surface of the valve positioner housing, and the pressing block is replaced with a pressing block having a recess on the lower surface, which can avoid the electrical connector and press the housing tightly during operation;

[0045] The buffer is an annular structure, also made of rubber, and is sleeved onto the pressure block;

[0046] The rest of the design is the same as that of the first embodiment.

[0047] In other embodiments of the utility model, a plurality of positioning platforms and a gantry and a clamping assembly corresponding to each positioning platform can be arranged on the frame, and a plurality of valve positioner housings can be subjected to water pressure testing at the same time, thereby improving the testing efficiency;

[0048] The water inlet pipe can be divided into multiple pressure water pipes to connect the water inlet channels of each positioning platform, and each pressure water pipe is provided with a pressure water valve to control the on and off;

[0049] Each water pressure pipe is connected to an independent drainage pipe, and a drainage valve is provided on the drainage pipe to control the on-off;

[0050] The rest of the design is the same as that of the first embodiment.

[0051] The beneficial effects of the water pressure test device for the valve positioner housing of the utility model are:

[0052] 1. The cylinder and the sensor cooperate to automatically press the valve positioner housing, without manual operation, which improves the efficiency of the test. At the same time, the sensor is used to determine whether the housing is placed in place, so that the pressure test device can cooperate with the mechanical arm to realize the automatic placement, testing and removal of the housing.

[0053] 2. Design a cylindrical positioning table to adapt to shells with different joint positions and any placement direction of the shell;

[0054] 3. Set the cylinder to adjust the joint position to the center, and then drive the pressure block to press down and tighten the valve positioner housing to make the structure more stable and the water pressure test more accurate;

[0055] 4. A detachable pressing block is provided to adapt to different structures of the shell by replacing different pressing blocks.

[0056] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A water pressure test device for a valve positioner housing, characterized in that: include: Frame, positioning table, gantry, clamping assembly and water inlet assembly; The positioning platform is arranged on the working surface of the frame; The working surface and the positioning platform have a water inlet channel; The gantry is arranged on the working surface and is located above the positioning platform; The clamping assembly includes a cylinder, a pressure block, a buffer and a sensor. The cylinder is arranged on the top of the gantry with the driving end facing downward. The pressure block is arranged at the driving end of the cylinder and is detachably connected. The buffer is sleeved on the pressure block. The sensor is arranged on one side of the cylinder for sensing the position of the housing. The water inlet assembly is arranged below the working surface and connected to the water inlet channel.

2. A water pressure test device for a valve positioner housing according to claim 1, characterized in that: The water inlet assembly comprises a water inlet pipe, a pressure water pipe and a drain pipe, which are connected via an electric three-way valve, and the upper end of the pressure water pipe is connected to the water inlet channel.

3. A water pressure test device for a valve positioner housing according to claim 2, characterized in that: The positioning platform is also provided with a sealing gasket.

4. A water pressure test device for a valve positioner housing according to claim 3, characterized in that: The positioning platform is a cylindrical structure as a whole, and the bottom is embedded in the working surface of the frame. The embedded connection area is also cylindrical and is provided with a sealing ring.

5. A water pressure test device for a valve positioner housing according to any one of claims 1 to 4, characterized in that: A pair of alignment cylinders are also arranged in the positioning platform, and the driving ends of the alignment cylinders point to the water inlet channel and are provided with clamps.

6. A water pressure test device for a valve positioner housing according to claim 5, characterized in that: The clip has an arc-shaped concave surface.

7. A water pressure test device for a valve positioner housing according to any one of claims 1 to 4, characterized in that: The pressing block is a pressing block with a flat lower surface or a pressing block with a clearance groove on the lower surface.

8. A water pressure test device for a valve positioner housing according to claim 7, characterized in that: A pair of alignment cylinders are also arranged in the positioning platform, and the driving ends of the alignment cylinders point to the water inlet channel and are provided with clamps.

9. A water pressure test device for a valve positioner housing according to claim 8, characterized in that: The clip has an arc-shaped concave surface.

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