阅读说明：本技术 一种阀门气密检测平台 (Valve airtightness detection platform ) 是由 程一飞 李玉道 曹卫东 董国庆 张帅帅 于 2021-11-10 设计创作，主要内容包括：本发明公开一种阀门气密检测平台,涉及阀门密封性能检测技术领域,包括工作台,工作台上对称设有两组滑动支座,滑动支座相对面一侧顶端设有夹持组件,夹持组件被配置用以夹持固定阀门本体,滑动支座相对面一侧均设有定位机构,定位机构被配置用以插入阀门本体的进出孔内对阀门本体进行定位密封；位机构包括密封套和弧形板,弧形板圆周阵列分布在滑动支座上组合成圆筒状,密封套套接在弧形板组合成的圆筒外侧,本发明将定位机构设置成可展开和收缩的结构,并设置可膨胀的密封套,通过定位机构的展开配合密封套膨胀对阀门进行装夹定位,减少了繁杂的拆装程序,且连接的密封效果好,同时对阀门本体起到良好的保护作用。(The invention discloses a valve airtightness detection platform, which relates to the technical field of valve sealing performance detection and comprises a workbench, wherein two groups of sliding supports are symmetrically arranged on the workbench, clamping assemblies are arranged at the top ends of one sides of opposite surfaces of the sliding supports, the clamping assemblies are configured for clamping and fixing a valve body, positioning mechanisms are arranged on one sides of the opposite surfaces of the sliding supports, and the positioning mechanisms are configured for being inserted into inlet and outlet holes of the valve body to position and seal the valve body; the positioning mechanism is arranged into an expandable and contractible structure, and the expandable sealing sleeve is arranged, so that the valve is clamped and positioned by the expansion of the positioning mechanism and the expansion of the sealing sleeve, the complicated disassembly and assembly procedures are reduced, the connecting sealing effect is good, and the valve body is well protected.)

1. The valve airtightness detection platform comprises a workbench (1), and is characterized in that two groups of sliding supports (2) are symmetrically arranged on the workbench (1), the distance between the sliding supports (2) is adjustable, a clamping assembly is arranged at the top end of one side of the opposite surface of each sliding support (2), the clamping assemblies are configured to clamp and fix a valve body (10), positioning mechanisms are arranged on one sides of the opposite surfaces of the sliding supports (2), and the positioning mechanisms are configured to be inserted into inlet and outlet holes of the valve body (10) to position and seal the valve body (10);

positioning mechanism includes seal cover (4) and arc (5), arc (5) are made by a plurality of parts of drum axial evenly cut apart, and arc (5) bottom and sliding support (2) sliding connection and circumference array distribution make up into cylindricly on sliding support (2), seal cover (4) cup joint in the drum outside that arc (5) made up, and seal cover (4) are close to sliding support (2) one end and sliding support (2) fixed connection and form semi-closed space, the inside hollow form that becomes of seal cover (4), valve body (10) one side is kept away from in arc (5) is connected with actuating mechanism, and its drive arc (5) radially expand or shrink along the drum.

2. The valve airtightness detection platform according to claim 1, wherein a through hole (202) is formed in one side of the sliding support (2), the through hole (202) is communicated with the first sliding groove (201), and a barometer (13) is fixedly connected to an end of the through hole (202).

3. The valve airtightness detection platform according to claim 2, wherein a first air pipe (8) is arranged on one side of the sliding support (2), one end of the first air pipe (8) is communicated with the first chute (201), the other end of the first air pipe (8) is communicated with an air pump (9), and the air pump (9) is fixedly connected with the workbench (1).

4. The valve airtightness detection platform according to claim 3, wherein the clamping mechanism comprises a clamping block (3), a telescopic adjustment mechanism is arranged on one side, away from the valve body (10), of the clamping block (3), the clamping block (3) is slidably connected with a slide rail (22) arranged at the top end of the sliding support (2), and a limiting assembly is arranged on the clamping block (3) and used for fixing the clamping block (3).

5. The valve airtightness detection platform according to claim 4, wherein a plurality of first sliding grooves (201) are formed in the sliding support (2) in a circumferential array manner, one side, close to the sliding support (2), of the arc-shaped plate (5) is accommodated in the first sliding grooves (201) and is in sliding connection with the first sliding grooves (201), the driving mechanism comprises a connecting rod (51) and a sleeve (52), one end of the connecting rod (51) is hinged to the arc-shaped plate (5), the other end of the connecting rod is hinged to the sleeve (52), the sleeve (52) is coaxial with a cylinder formed by the arc-shaped plate (5), and one end of the sleeve (52) is connected with a linear mechanism to drive the sleeve (52) to move axially.

6. The valve airtightness detection platform according to claim 5, wherein the first sliding groove (201) penetrates through the sliding support (2), a round rod (26) is arranged on one side, away from the arc-shaped plate (5), of the sliding support (2), the sleeve (52) is sleeved on the round rod (26) and is in sliding connection with the round rod (26), one side, away from the sliding support (2), of the sleeve (52) is closed, a vacuum bagging bag (6) is arranged between the sleeve (52) and the sliding support (2), one end of the vacuum bagging (6) is fixed on the outer circumferential side of the sleeve (52) in a sealing mode, and the other end of the vacuum bagging (6) is fixed on the sliding support (2) to form a closed space.

7. The valve airtightness detection platform according to claim 1, wherein an air cylinder (14) is arranged on one side of the sliding support (2) away from the valve body (10), the air cylinder (14) is communicated with the sealing sleeve (4) through a first air pipe (16), a piston is arranged in the air cylinder (14), a second connecting plate (15) is fixedly connected to one end, away from the air cylinder (14), of the piston, and the other end of the second connecting plate (15) is fixedly connected with the sleeve (52).

8. The valve airtightness detection platform according to claim 1, wherein an adjusting mechanism is connected to a bottom end of the sliding support (2), the adjusting mechanism comprises a lead screw (11), and the sliding support (2) is in threaded connection with the lead screw (11).

Technical Field

The invention belongs to the technical field of valve sealing performance detection, and particularly relates to a valve airtightness detection platform.

Background

The valve is a common opening and closing piece during gas or liquid circulation, is generally used for two important trades of gas pipe network and water conservancy transportation, consequently, all need carry out sealing performance detection and torque test before leaving the factory, nevertheless has great potential safety hazard. When prior art carries out sealing performance test to the valve, the sealed mode of adoption is comparatively traditional, arranges two sealed pads in the valve both ends respectively usually, uses force applying device such as jack or pneumatic cylinder to press from both sides the sealed pad at valve both ends to make sealed pad and two tip formation of valve sealed, carry out sealing performance test to the inside cavity of valve again. The valve is sealed and tested by the method, so that the clamping is inconvenient, the efficiency is lower, the extrusion force borne by two ends of the valve is difficult to control, and the valve is easily damaged if the extrusion force is too large. Therefore, we propose a valve airtightness testing platform.

Disclosure of Invention

In view of the deficiencies of the prior art, the present invention provides a valve airtightness testing platform to solve the problems mentioned above in the background art.

The purpose of the invention can be realized by the following technical scheme: a valve airtightness detection platform comprises a workbench, wherein two groups of sliding supports are symmetrically arranged on the workbench, the distance between the sliding supports is adjustable, a clamping assembly is arranged at the top end of one side of the opposite surface of each sliding support, the clamping assembly is configured to clamp and fix a valve body, positioning mechanisms are arranged on one side of the opposite surface of each sliding support, and the positioning mechanisms are configured to be inserted into inlet and outlet holes of the valve body to position and seal the valve body;

the positioning mechanism comprises a sealing sleeve and an arc-shaped plate, the arc-shaped plate is formed by uniformly dividing a cylinder into a plurality of parts in the axial direction, the bottom end of the arc-shaped plate is connected with a sliding support in a sliding mode, the circumference array of the arc-shaped plate is distributed on the sliding support to form a cylinder shape, the sealing sleeve is sleeved on the outer side of the cylinder formed by combining the arc-shaped plate, one end, close to the sliding support, of the sealing sleeve is fixedly connected with the sliding support to form a semi-closed space, the sealing sleeve is hollow, and one side, away from the valve body, of the arc-shaped plate is connected with a driving mechanism to drive the arc-shaped plate to expand or contract along the radial direction of the cylinder.

As a further scheme of the invention, one side of the sliding support is provided with a through hole, the through hole is communicated with the first sliding groove, and the end part of the through hole is fixedly connected with a barometer.

As a further scheme of the invention, one side of the sliding support is provided with a first air pipe, one end of the first air pipe is communicated with the first sliding groove, the other end of the first air pipe is communicated with an air pump, and the air pump is fixedly connected with the workbench.

As a further scheme of the invention, the clamping mechanism comprises a clamping block, a telescopic adjusting mechanism is arranged on one side of the clamping block, which is far away from the valve body, the clamping block is in sliding connection with a sliding rail arranged at the top end of the sliding support, and a limiting component is arranged on the clamping block and used for fixing the clamping block.

As a further scheme of the invention, a plurality of first sliding grooves are distributed on the sliding support in a circumferential array manner, one side, close to the sliding support, of the arc-shaped plate is accommodated in the first sliding grooves and is in sliding connection with the first sliding grooves, the driving mechanism comprises a connecting rod and a sleeve, one end of the connecting rod is hinged with the arc-shaped plate, the other end of the connecting rod is hinged with the sleeve, the sleeve is coaxial with a cylinder formed by the arc-shaped plate, and one end of the sleeve is connected with a linear mechanism to drive the sleeve to move axially.

As a further scheme of the invention, the first chute penetrates through the sliding support, a round rod is arranged on one side of the sliding support, which is far away from the arc-shaped plate, the sleeve is sleeved on the round rod and is in sliding connection with the round rod, one side of the sleeve, which is far away from the sliding support, is closed, a vacuum sleeve bag is arranged between the sleeve and the sliding support, one end of the vacuum sleeve bag is hermetically fixed on the outer circumferential side of the sleeve, and the other end of the vacuum sleeve bag is fixed on the sliding support to form a closed space.

As a further scheme of the invention, an air cylinder is arranged on one side of the sliding support far away from the valve body, the air cylinder is communicated with the sealing sleeve through a first air pipe, a piston is arranged in the air cylinder, one end of the piston far away from the air cylinder is fixedly connected with a second connecting plate, and the other end of the second connecting plate is fixedly connected with a sleeve.

As a further scheme of the invention, the bottom end of the sliding support is connected with an adjusting mechanism, the adjusting mechanism comprises a lead screw, and the sliding support is in threaded connection with the lead screw.

The invention has the beneficial effects that: according to the invention, the positioning mechanism is arranged to be an expandable and contractible structure, the expandable sealing sleeve is arranged, and the valve is clamped and positioned by the expansion of the positioning mechanism and the expansion of the sealing sleeve, so that complicated disassembly and assembly procedures are reduced, the connection sealing effect is good, the valve body is well protected, the air tightness detection effect is improved, and the detection efficiency is improved.

Drawings

In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a cross-sectional view of the overall structure of the present invention;

FIG. 3 is a schematic structural view of the positioning mechanism of the present invention;

FIG. 4 is an exploded view of the overall structure of the present invention;

FIG. 5 is a top view of the overall structure of the present invention;

FIG. 6 is a schematic structural view of the shoe of the present invention;

FIG. 7 is a schematic structural view of the live shoe of the present invention;

fig. 8 is a schematic structural view of a tube assembly of the present invention.

In the figure: a workbench-1, a sliding support-2, a clamping block-3, a second cylinder-31, a limit bolt-32, a sealing sleeve-4, an arc-shaped plate-5, a connecting rod-51, a sleeve-52, a vacuum sleeve-6, a first cylinder-7, a first connecting plate-71, a bolt-72, a first air pipe-8, an air pump-9, a valve body-10, a lead screw-11, a motor-12, a barometer-13, an air cylinder-14, a second connecting plate-15, a first air pipe-16, a slide rail-21, a slide rail-22, a fixing plate-23, a first fixing sleeve-24, a second fixing sleeve-25, a round rod-26, a first chute-201, a through hole-202, a limit hole-221, a second chute-101, a limit bolt-9, a limiting bolt-9, a sealing sleeve-4, a curved plate-5, a connecting rod-51, a sleeve-52, a vacuum sleeve-6, a vacuum sleeve-16, a slide rail-21, a slide rail-22, a fixing plate, a fixing sleeve-24, a fixing sleeve-25, a fixing sleeve and a fixing sleeve-2, And (5) fixing blocks-102.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 8, in an embodiment of the present invention, a valve airtightness detection platform includes a workbench 1, two sets of sliding supports 2 are symmetrically disposed on the workbench 1, a distance between the sliding supports 2 is adjustable, a clamping assembly is disposed at a top end of one side of an opposite surface of each sliding support 2, the clamping assembly is configured to clamp and fix a valve body 10, positioning mechanisms are disposed at both sides of the opposite surface of each sliding support 2, and the positioning mechanisms are configured to be inserted into inlet and outlet holes of the valve body 10 to position and seal the valve body 10;

positioning mechanism includes seal cover 4 and arc 5, arc 5 is made by a plurality of parts of drum axial evenly cut apart, and 5 bottoms of arc and 2 sliding connection of sliding support and circumference array distribution make up into cylindricly on sliding support 2, seal cover 4 cup joints the drum outside that arc 5 made up, and seal cover 4 is close to 2 one end of sliding support and forms semi-enclosed space with 2 fixed connection of sliding support, the inside hollow form that becomes of seal cover 4, 10 one side of valve body is kept away from to arc 5 is connected with actuating mechanism drive arc 5 and radially expandes or contract along the drum.

When the air tightness test is carried out, the valve body 10 is arranged in the middle of the sliding support 2 and is clamped and fixed by the clamping block 3, the cylinder formed by combining the arc plates 5 is contracted to be inserted into the valve body 10, then the arc plates 5 are driven to radially expand by the driving mechanism to be attached to the inner wall of the valve body 10, then the sealing sleeve 4 is filled with gas to expand, the volume is increased, the gap between the cylinder formed by combining the arc plates 5 and the inner wall of the valve body 10 is completely filled, the outer diameter of the cylinder formed by combining the arc plates 5 can be flexibly adjusted, the air tightness test device is suitable for air tightness tests of valves of different models, meanwhile, the sealing sleeve 4 is further used for sealing and filling, the sealing effect is improved, compared with the prior art, the complicated dismounting procedures are reduced, the connecting sealing effect is good, meanwhile, the good protection effect is played to the valve body, and the air tightness detection effect is improved, meanwhile, the detection efficiency is improved.

Preferably, as shown in fig. 1 and 6, a through hole 202 is formed at one side of the sliding support 2, the through hole 202 is communicated with the first sliding groove 201, and an air pressure gauge 13 is fixedly connected to an end of the through hole 202, that is, the air pressure gauge 13 monitors the change of air pressure to check the air tightness.

Specifically, as shown in fig. 1, a first air pipe 8 is arranged on one side of the sliding support 2, one end of the first air pipe 8 is communicated with the first chute 201, the other end of the first air pipe 8 is communicated with an air pump 9, and the air pump 9 is fixedly connected with a fixing block 102 arranged on the workbench 1.

Specifically, as shown in fig. 1 and 4, fixture includes clamp splice 3, clamp splice 3 is kept away from valve body 10 one side and is equipped with flexible adjustment mechanism, slide rail 22 sliding connection that clamp splice 3 and 2 top of sliding support set up, be equipped with spacing subassembly on the clamp splice 3 and be used for fixed clamp splice 3, flexible adjustment mechanism adopts second cylinder 31, adjusts convenient and fast, can also adopt double-screw bolt cooperation threaded connection to adjust, spacing subassembly includes spacing bolt 32, spacing bolt 32 and 3 threaded connection of clamp splice, set up the spacing hole 221 that holds second cylinder 31 on the slide rail 22, it is spacing to carry out vertical direction to clamp splice 3 in inserting spacing hole 221 through rotatory spacing bolt 32 promptly, it is fixed to be suitable for the valve clamping of different models.

Further, as shown in fig. 6 and 8, a plurality of first sliding grooves 201 are distributed on the sliding support 2 in a circumferential array, one side of the arc plate 5, which is close to the sliding support 2, is received in the first sliding grooves 201 and is connected with the first sliding grooves 201 in a sliding manner, the driving mechanism includes a connecting rod 51 and a sleeve 52, one end of the connecting rod 51 is hinged to the arc plate 5, the other end of the connecting rod is hinged to the sleeve 52, the sleeve 52 is coaxial with the cylinder formed by the arc plate 5, one end of the sleeve 52 is connected with a linear mechanism to drive the sleeve 52 to move axially, a first fixed collar 24 is arranged on the outer circumferential side of the first sliding groove 201, the sealing sleeve 4 is fixed on the first fixed collar 24 through a clamping member, as shown in fig. 2, that is, the linear mechanism controls the sleeve 52 to move left and right to unfold or retract the arc plate 5 inwards, the operation is convenient and fast, and particularly as shown in fig. 3, a first cylinder 7 is arranged at one end of the sleeve 52, the first cylinder 7 is fixedly installed on the fixed plate 23 arranged on the sliding support 2, a first connecting plate 71 is arranged on a piston rod of the first cylinder 7, and the first connecting plate 71 is fixedly connected with the end surface of the sleeve 52 through a bolt 72, namely the sleeve 52 is driven to move left and right through the first cylinder 7.

Preferably, as shown in fig. 4 and 7, first spout 201 runs through sliding support 2, sliding support 2 keeps away from arc 5 one side and is equipped with round bar 26, sleeve 52 cup joints on round bar 26 with round bar 26 sliding connection, sleeve 52 keeps away from sliding support 2 one side and seals, be equipped with vacuum cover bag 6 between sleeve 52 and the sliding support 2, the sealed outer circumference side of fixing at sleeve 52 of vacuum cover bag 6 one end, the other end is fixed on the round bar 26 that sets up on sliding support 2 to form airtight space, convenient to detach, when device itself appears sealed problem and when the inner assembly goes wrong, through taking apart vacuum cover bag and sleeve 52 end junction, can overhaul the change to the inner part, convenient operation is swift, has improved the efficiency of maintenance.

In another embodiment, as shown in fig. 5, the sliding support 2 is provided with an air cylinder 14 on the side away from the valve body 10, the air cylinder 14 is communicated with the sealing sleeve 4 through a first air pipe 16, a piston is arranged in the air cylinder 14, one end of the piston, far away from the air cylinder 14, is fixedly connected with a second connecting plate 15, the other end of the second connecting plate 15 is fixedly connected with the sleeve 52, the sealing sleeve 4 is made of elastic material, that is, when the sleeve 52 moves toward the valve body 10, the arc-shaped plate 5 is unfolded to fit the inner wall of the valve body 10, at the same time, the sleeve 52 drives the second connecting plate 15 to press the gas in the gas cylinder 14 into the sealing sleeve 4, thereby make seal cover 4 follow the increase of 5 external diameters of arc and grow, the clearance between automatic filling arc 5 and the valve body 10 avoids artifical the volume that fills gas and can't guarantee gas at every turn and causes sealed not in place.

Preferably, the bottom end of the sliding support 2 is accommodated in a second chute 101 formed in the workbench 1, the bottom end of the sliding support 2 is connected with an adjusting mechanism for adjusting the distance between the sliding support 2, the adjusting mechanism comprises a lead screw 11, the bottom end of the sliding support 2 is provided with a threaded hole 21 and the lead screw 11 is in threaded connection, one end of the lead screw 11 is fixedly connected with an output shaft of the motor 12, and the distance between the sliding support 2 can be adjusted by the cooperation of a gear and a rack and a double-acting cylinder.

The invention relates to a valve airtightness detection platform, which comprises the following detection methods:

and (3) sealing test: a section of circular tube is arranged between two groups of sliding supports 2, the sliding supports 2 are moved to enable a cylinder formed by combining arc plates 5 to be inserted into the circular tube, the arc plates 5 are driven to expand along the radial direction through a linear mechanism to be attached to the inner wall of the circular tube, meanwhile, gas is filled into a sealing sleeve 4 to expand the sealing sleeve, namely, a sealed space is formed between the two groups of sliding supports 2 and the circular tube, an air pump 9 is started to inject set gas into the sealed space through a first air tube 8, the pressure value displayed by a gas pressure gauge 13 is recorded, and whether the pressure value changes or not is observed;

testing the air tightness of the valve: closing the valve, placing the valve body 10 to be tested between the two groups of sliding supports 2, clamping and fixing the valve body 10 by adjusting the clamping blocks 3, moving the sliding supports 2 to enable a cylinder formed by combining the arc plates 5 to be inserted into holes at two ends of the valve body 10, driving the arc plates 5 to expand along the radial direction through a linear mechanism to enable the arc plates to be attached to the inner wall of the valve body 10, meanwhile, filling gas into the sealing sleeve 4 to enable the sealing sleeve to expand, namely, respectively forming closed spaces between the two groups of sliding supports 2 and the valve body 10, starting the air pump 9 to sequentially fill the set gas into the closed spaces at two sides through the first air pipe 8, recording the air pressure value displayed by the air pressure gauge 13, observing whether the air pressure value changes, and detecting the static air tightness of the valve body 10;

the air pump 9 is used for respectively filling equal amount of air into the closed spaces at the two sides through the first air pipe 8, so that the air pressure values at the two ends are the same, the valve body 10 is rotated to be opened to 1/4, 1/2 and 3/4, the opening is completed, the numerical value change of the air pressure meter 13 is observed, and the dynamic air tightness of the valve body 10 is detected.

The working principle of the invention is as follows: when the air tightness test is carried out, the valve body 10 is arranged in the middle of the sliding support 2 and is clamped and fixed by the clamping block 3, the cylinder formed by combining the arc plates 5 is contracted to be inserted into the valve body 10, then the arc plates 5 are driven to radially expand by the driving mechanism to be attached to the inner wall of the valve body 10, then the sealing sleeve 4 is filled with gas to expand, the volume is increased, the gap between the cylinder formed by combining the arc plates 5 and the inner wall of the valve body 10 is completely filled, the outer diameter of the cylinder formed by combining the arc plates 5 can be flexibly adjusted, the air tightness test device is suitable for air tightness tests of valves of different models, meanwhile, the sealing sleeve 4 is further used for sealing and filling, the sealing effect is improved, compared with the prior art, the complicated dismounting procedures are reduced, the connecting sealing effect is good, meanwhile, the good protection effect is played to the valve body, and the air tightness detection effect is improved, meanwhile, the detection efficiency is improved.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", etc., indicating an orientation or positional relationship are based on the orientation or positional relationship shown in the drawings and are used merely for convenience in describing the present invention and for simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, or be operated, and thus, should not be construed as limiting the present invention.

Furthermore, the method is simple. The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

It will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the spirit and scope of the invention, and any equivalents thereto, such as those skilled in the art, are intended to be embraced therein.