CN206905985U - Air-tightness detection device - Google Patents

Abstract

The utility model discloses a kind of air-tightness detection device, including pedestal, standard valve body unit, tested valve body unit, differential pressure pickup, hydraulic stem and pressure cylinder, described standard valve body unit, tested valve body unit, differential pressure pickup, hydraulic stem and pressure cylinder are respectively erected on pedestal, described standard unit and measured piece unit all include support, upper fixture, lower clamp, upper fixture fixed plate, lower clamp fixed plate, upper connecting tube and lower connecting tube, the utility model is reasonable in design, compared to traditional air-tightness using water inspection method measure valve, the present apparatus has simple to operate, detection is accurate, data accuracy is good, the present apparatus can be by changing the upper fixture coordinated with valve body and lower clamp simultaneously, it is applicable to the detection of the valve body of sizes specification.

Description

Air tightness detection device

technical field

The utility model relates to an air tightness detection device.

Background technique

At present, many airtightness testing products on the market can judge the airtightness of the valve body, and many airtightness test methods use water, which is low in cost, but the accuracy of the data is low due to naked eye observation. , with the development of sensor technology, the detection of air tightness through sensors has become a new trend of air tightness detection in this technical field.

Utility model content

The purpose of the utility model is to overcome the above-mentioned deficiencies in the prior art, and provide an air-tightness detection device with reasonable structure design, stable structure, and suitable for multi-standard valve body detection.

The technical solution adopted by the utility model to solve the above problems is: an air tightness detection device, including a base, a standard valve body unit, a tested valve body unit, a differential pressure sensor, a hydraulic rod and a pressure cylinder. The valve body unit, the tested valve body unit, the differential pressure sensor, the hydraulic rod and the pressure cylinder are erected on the base respectively. Plate, lower clamp fixing plate, upper connecting pipe and lower connecting pipe, the upper clamp fixing plate is fixed on the upper side of the bracket, the lower fixing part is slidably arranged on the lower side of the bracket, the upper clamp and the upper clamp fixing plate The lower end surface of the lower fixture is fixed, the lower fixture is fixed with the lower end surface of the fixing plate of the lower fixture, one end of the upper connecting pipe is connected and fixed with one end of the upper fixture, one end of the lower connecting pipe is connected and fixed with one end of the lower fixture, and the standard valve body The two ends are respectively communicated and fixed with the other end of the upper fixture and the lower fixture of the corresponding standard valve body unit, and the two ends of the tested valve body are respectively communicated and fixed with the other end of the upper fixture and the lower fixture of the corresponding tested valve body unit, One end of the differential pressure sensor at the other end of the upper connecting pipe of the standard valve body unit is connected, and the other end of the differential pressure sensor at the other end of the upper connecting pipe of the measured valve body unit is connected. The standard valve body The lower connecting pipe of the unit, the lower connecting pipe of the tested valve body unit, and the cavity of the pressure cylinder communicate with each other respectively. A piston is slidably arranged in the cavity of the pressure cylinder, and the piston is fixed to one end of the hydraulic rod so that A hydraulic rod pushes the piston up and down.

Further: it also includes a control chip and an alarm, and the pressure difference sensor is connected to the alarm and the control chip.

Further: the upper fixture and the lower fixture are provided with flanges fixed to the upper fixture fixing plate and the lower fixture fixing plate respectively, and the center positions of the upper fixture fixing plate and the lower fixture fixing plate are provided with upper The through holes of the connecting pipe and the lower connecting pipe, the upper fixture fixing plate and the lower fixture fixing plate are concentrically provided with a number of fixing grooves, the fixing grooves are respectively extended to the direction of the through holes, and the bolts are passed through the fixing grooves and the flanges. On the mounting hole of the disc, the upper fixture and the lower fixture are provided with flanges fixed to the upper fixture fixing plate and the lower fixture fixing plate respectively.

Further: the bottom of the bracket is provided with a number of support screws having the same number as the fixing slots, and the support screws are respectively sequentially installed in the chute of the fixing plate of the lower fixture and the mounting holes of the flange of the lower fixture Above, the upper limit sleeve and the lower limit sleeve are arranged on the support screw through thread fit, the end surface of the upper limit sleeve is attached to the upper end surface of the flange, and the support screw is sleeved There is a damping spring, one end of the damping spring fits with the lower end surface of the lower fixture fixing plate, and the other end of the damping spring fits with the upper end surface of the lower limit sleeve.

Further: the lower connecting pipe is a high-pressure corrugated pipe.

Further: a plurality of pulleys are arranged on the edge of the lower fixture fixing plate, and the pulleys are slidably arranged on the bracket.

Compared with the prior art, the utility model has the following advantages and effects: the structural design is reasonable, and compared with the traditional water detection method for measuring the air tightness of the valve, the device has the advantages of simple operation, accurate detection, good data accuracy, and at the same time The device can be applied to the detection of valve bodies of various sizes and specifications by replacing the upper fixture and the lower fixture matched with the valve body.

Description of drawings

Fig. 1 is a schematic structural diagram of an air tightness detection device according to an embodiment of the present invention.

Fig. 2 is a schematic structural view of the lower clamp fixing plate of the embodiment of the present invention.

Fig. 3 is a schematic diagram of the connecting structure of the supporting screw in the embodiment of the present invention.

detailed description

The utility model will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are explanations of the utility model and the utility model is not limited to the following examples.

Referring to Fig. 1-Fig. 3, an airtightness detection device in this embodiment includes a base 1, a standard valve body 61 unit, a tested valve body 62 unit, a differential pressure sensor 2, a hydraulic rod 3 and a pressure cylinder 4. The standard valve body 61 unit, the tested valve body 62 unit, the differential pressure sensor 2, the hydraulic rod 3 and the pressure cylinder 4 are set up on the base 1 respectively, and the standard unit and the tested unit include a bracket 51 , upper clamp 52, lower clamp 53, upper clamp fixing plate 54, lower clamp fixing plate 55, upper connecting pipe 56 and lower connecting pipe 57, the upper clamp fixing plate 54 is fixed on the upper side of the support 51, and the lower fixing member Slidingly arranged on the lower side of the bracket 51, the upper clamp 52 is fixed to the lower end surface of the upper clamp fixing plate 54, the lower clamp 53 is fixed to the lower end surface of the lower clamp fixing plate 55, and one end of the upper connecting pipe 56 is connected to One end of the upper fixture 52 is connected and fixed, one end of the lower connecting pipe 57 is connected and fixed with one end of the lower fixture 53, and the two ends of the standard valve body 61 are respectively connected with the other end of the upper fixture 52 and the lower fixture 53 of the corresponding standard valve body 61 unit. The two ends of the tested valve body 62 are respectively communicated and fixed with the other end of the upper clamp 52 and the lower clamp 53 of the corresponding tested valve body 62 unit, and the other end of the upper connecting pipe 56 of the standard valve body 61 unit One end of the differential pressure sensor 2 at one end communicates, the other end of the differential pressure sensor 2 at the other end of the upper connecting pipe 56 of the described tested valve body 62 unit communicates, the lower connecting pipe 57 of the standard valve body 61 unit, The lower connecting pipe 57 of the measuring valve body 62 unit and the cavity of the pressure cylinder 4 communicate with each other respectively, and a piston is slidably arranged in the cavity of the pressure cylinder 4, and the piston is fixed to one end of the hydraulic rod 3, so that the hydraulic rod 3. Push the piston to move up and down, and also include a control chip and an alarm. The pressure difference sensor 2 is connected to the alarm and the control chip. The flange plate fixed by the clamp fixing plate 55, the central position of the upper clamp fixing plate 54 and the lower clamp fixing plate 55 is provided with a through hole that passes through the upper connecting pipe 56 and the lower connecting pipe 57, and the upper clamp fixing plate 55 is fixed. Around the plate 54 and the lower fixture fixing plate 55, several fixing grooves 552 are concentrically arranged, and the fixing grooves 552 are respectively extended to the through hole direction. The lower clamp 53 is provided with flanges fixed to the upper clamp fixing plate 54 and the lower clamp fixing plate 55 respectively, and the bottom of the support 51 is provided with a number of support screws 58 having the same number as the fixing grooves 552. A number of supporting screws 58 are successively installed in the chute of the lower fixture fixing plate 55 and on the mounting hole of the flange of the lower fixture 53, and the supporting screws 58 are provided with an upper limit sleeve 581 and a lower limit sleeve 581 through threaded cooperation. Sleeve 582, the end surface of the upper limit sleeve 581 is attached to the upper end surface of the flange, and the support screw 58 is covered with a shock absorbing spring 583, and the shock absorbing spring 583 is The other end of the damping spring 583 is fitted to the upper end of the lower limit sleeve 582. The lower connecting pipe 57 is a high-pressure bellows, and the lower clamp is fixed The edge of the plate 55 is provided with several pulleys 551, and the pulleys 551 are slidably arranged on the bracket 51. The operation method of the present utility model: fix the standard valve body 61 and the tested valve body 62 respectively, the standard valve body 61 and the tested valve body The specifications of the valve body 62 are the same, and the standard valve body 61 has good airtightness. When testing, the hydraulic rod 3 is pressed down to push the piston, and the pressure in the cavity increases. If the airtightness of the tested valve body 62 is good, the pressure on both sides The difference is zero. When the measured valve body 62 leaks, the pressure difference on both sides changes, which is monitored by the pressure difference sensor 2 and processed by the control chip and alarmed by the alarm. The device can also be pressed down through the telescopic rod. Pressurization can detect the pressure resistance performance of the tested valve body 62 under different pressures.

The above content described in this specification is only an illustration of the utility model. Those skilled in the technical field to which the utility model belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, as long as they do not deviate from the content of the specification of the utility model or go beyond the definition of the claims All should belong to the protection scope of the present utility model.

Claims (7)

1. An air tightness detection device, characterized in that: comprising a base, a standard valve body unit, a measured valve body unit, a differential pressure sensor, a hydraulic rod and a pressure cylinder, the standard valve body unit, the measured valve body The body unit, the pressure difference sensor, the hydraulic rod and the pressure cylinder are erected on the base respectively. The standard unit and the tested unit include a bracket, an upper fixture, a lower fixture, an upper fixture fixing plate, a lower fixture fixing plate, The upper connecting pipe and the lower connecting pipe, the upper clamp fixing plate is fixed on the upper side of the bracket, the lower fixing member is slidably arranged on the lower side of the bracket, the upper clamp is fixed to the lower end surface of the upper clamp fixing plate, and the lower clamp It is fixed with the lower end surface of the fixing plate of the lower fixture, one end of the upper connecting pipe is connected and fixed with one end of the upper fixture, one end of the lower connecting pipe is connected and fixed with one end of the lower fixture, and the two ends of the standard valve body are respectively connected with the corresponding standard The other ends of the upper fixture and the lower fixture of the valve body unit are connected and fixed, and the two ends of the tested valve body are respectively connected and fixed with the other ends of the upper fixture and the lower fixture of the corresponding tested valve body unit. The standard valve body unit One end of the differential pressure sensor at the other end of the upper connecting pipe is connected, the other end of the differential pressure sensor at the other end of the upper connecting pipe of the measured valve body unit is connected, and the lower connecting pipe of the standard valve body unit, The lower connecting pipe of the measuring valve body unit and the cavity of the pressure cylinder communicate with each other respectively. A piston is slidably arranged in the cavity of the pressure cylinder, and the piston is fixed to one end of the hydraulic rod so that the hydraulic rod pushes the piston to move up and down. 2 . The air tightness detection device according to claim 1 , further comprising a control chip and an alarm, and the pressure difference sensor is connected to the alarm and the control chip. 3 . 3. The air tightness testing device according to claim 1, characterized in that: said upper fixture and lower fixture are provided with flanges respectively fixed to the upper fixture fixing plate and the lower fixture fixing plate, and said upper fixture The central positions of the fixture fixing plate and the lower fixture fixing plate are provided with through holes for piercing the upper connecting pipe and the lower connecting pipe, and several fixing grooves are concentrically arranged around the upper and lower fixture fixing plates, and the fixing grooves are respectively Extending to the direction of the through hole, the bolts are passed through the fixing groove and the mounting hole of the flange, so that the upper fixture and the lower fixture are provided with flanges fixed to the upper fixture fixing plate and the lower fixture fixing plate respectively. 4. The air tightness detection device according to claim 3, characterized in that: the bottom of the bracket is provided with a number of support screws with the same number as the fixing grooves, and the number of support screws are sequentially passed through the lower fixture for fixing In the chute of the plate and on the mounting hole of the flange of the lower fixture, the upper limit sleeve and the lower limit sleeve are arranged on the support screw through screw threads, and the end surface of the upper limit sleeve and the flange The upper end surface of the disc is attached, and the support screw is covered with a damping spring, one end of the damping spring is attached to the lower end surface of the lower clamp fixing plate, and the other end of the damping spring is attached to the upper end of the lower limit sleeve. End fit. 5. The air tightness detection device according to claim 1, characterized in that: said lower connecting pipe is a high-pressure corrugated pipe. 6 . The airtightness testing device according to claim 1 , wherein a plurality of pulleys are arranged on the edge of the fixing plate of the lower fixture, and the pulleys are slidably arranged on the bracket. 7 . 7. The air tightness detection device according to claim 1, characterized in that: said pressure cylinder is also provided with a pressure gauge for measuring the pressure value of the cavity of the pressure cylinder.