Airtightness detection device for closed valve

Abstract

The invention relates to the field of closed valve detection, in particular to a closed valve airtightness detection device which comprises a detection table, and four groups of connecting columns are mounted at four corners above the detection table. According to the invention, the gas delivery pipe and the fixed seat are replaced in corresponding models according to the size of the closed valve flange plate to be detected, and the installation mode of the bolts and the rotary drum can realize corresponding adjustment according to the number and position of vacant sites of the closed valve flange plate, so that the adaptability of the equipment is improved, and through the cooperation of the bolts and the threaded holes, the detection accuracy is improved. The flange ring and the fixing base are attached to the two sides of the closed valve flange plate, the interior of the closed valve is sealed, at the moment, after the interior of the closed valve is pressurized through the air pump connecting pipe, the change of internal air pressure is detected through the air pressure sensor, and detection of the air tightness of the closed valve is achieved. Through the structure, the leakage condition of the closed valve in a simulated working environment can be detected, so that the air tightness of the closed valve can be detected more intuitively, and the detection efficiency and effect are improved.

Description

Technical Field

[0001] The invention relates to the field of airtight valve detection, and in particular to an airtightness detection device for airtight valves. Background Art

[0002] Closed valves are key components in industrial piping systems and are used to control the flow and pressure of fluids. The sealing test is an important part of ensuring the reliability and safety of valves. The accuracy and reliability of the test results can be ensured by selecting appropriate testing methods, controlling test pressure, taking safety measures, and improving testing skills.

[0003] The Chinese patent application with the announcement number CN209416605U discloses an airtightness detection device for a closed valve, comprising a box, a water injection port is provided at the top of the box, a hydraulic cylinder is fixedly connected to the top of the inner wall of the box, a piston is movably connected to the inner wall of the hydraulic cylinder, one end of the piston is fixedly connected to a connecting block, and the bottom of the connecting block is fixedly connected to a top plate. The airtightness detection device for a closed valve presses the piston downward through the hydraulic cylinder so that the connecting block abuts the top plate against the top of the valve, and then water is injected into the box from the injection port. When the water floods the entire valve, it is observed through the glass partition whether water flows into the glass cylinder from the ventilation pipe. If water flows into the glass cylinder, it means that the valve is leaking and there is a safety hazard. If no water flows into the glass cylinder, it means that the valve is not leaking and there is no safety hazard, thereby achieving the effect of facilitating the detection of the airtightness of the closed valve during the production process.

[0004] During the use of the existing airtightness detection device for closed valves, since the closed valves are mostly used in the form of flange connection, and due to the particularity of flange docking, the bolts and nuts connected thereto need to be screwed in sequence, which consumes a lot of time. Therefore, the existing detection device only detects the closed valve after docking it with the equipment test point. Since the airtightness detection is not a simple detection of the airtightness of the valve body, it is also necessary to detect the connection between the valve body and the pipeline in order to truly detect the airtightness of the closed valve. However, the existing detection method cannot meet its requirements, and the detection method after flange docking installation has low detection efficiency and greater difficulty in operation.

[0005] Therefore, it is necessary to invent a closed valve airtightness detection device to solve the above problems. Summary of the invention

[0006] The purpose of the present invention is to provide a device for detecting air tightness of a closed valve, by which a screw automatically rotates along a threaded hole to fit the two sides of the closed valve flange with the flange ring and the fixing seat respectively, so as to fix the position of the closed valve and ensure the sealing performance of the detection. At this time, the closed valve is pressurized and the air pressure inside it is detected to solve the problems in the prior art that the scene after flange installation cannot be simulated during detection and the efficiency of such detection scene is low.

[0007] In order to achieve the above-mentioned object, the present invention provides the following technical solutions: a closed valve airtightness detection device, comprising a detection platform, four groups of connecting columns are installed at the four corners above the detection platform, a guide rail is installed on one side of the connecting column, a servo motor is installed above the guide rail, a screw is rotatably connected in the guide rail, and the screw is axially connected to the output end of the servo motor, an internal thread block is screwed on the screw, and a fixing plate is installed between the four groups of internal thread blocks;

[0008] The docking assembly arranged above the detection table includes electromagnetic slide rails, which are symmetrically installed above the detection table. Two groups of electromagnetic slide rails are slidably connected with sliding seats above them, and a gas delivery pipe is screwed on one side of the sliding seat;

[0009] The driving assembly arranged on the sliding seat comprises a bearing, the bearing is sleeved and fixed on the gas delivery pipe, and a connecting tube is sleeved and fixed on the outer side of the bearing;

[0010] The fixing components arranged above the detection platform and below the fixing plate include slide grooves, which are respectively opened on the surfaces of the detection platform and the fixing plate, and the two groups of slide grooves are arranged opposite to each other.

[0011] As a preferred solution of the present invention, the docking assembly also includes an air pump connecting pipe, which is installed on the side of the sliding seat away from the gas delivery pipe, and the air pump connecting pipe is connected to the pressurized air pump hose, and the air pump connecting pipe is connected to the inside of the gas delivery pipe.

[0012] As a preferred solution of the present invention, a flange ring is sleeved and fixed on one side of the gas delivery pipe, a rotating drum is rotatably connected through the flange ring, and multiple groups of rotating drums are installed in a ring-shaped distribution.

[0013] As a preferred solution of the present invention, a bolt is threaded on one side of the rotating drum, an air pressure sensor is installed on the inner wall of the gas delivery pipe, and the air pressure sensor is wirelessly connected to the background computer.

[0014] As a preferred solution of the present invention, the driving assembly also includes a gear 1, which is connected to the side of the rotating cylinder away from the bolt, and a gear ring 1 is installed on the inner wall of the connecting cylinder, and the gear ring 1 is meshed with each group of gears 1.

[0015] As a preferred solution of the present invention, a second gear ring is installed on the inner wall of the connecting tube, a second servo motor is installed on the surface of the gas delivery pipe, a second gear is installed on the output end of the second servo motor, and the second gear is meshed with the second gear ring.

[0016] As a preferred solution of the present invention, the fixing assembly also includes a sliding rod, which is installed on the inner wall of each group of slide grooves, and a slider is sleeved on the sliding rod, and a spring is sleeved on the sliding rod, and both sides of the spring are respectively in contact with the slider and the inner wall of the slide groove.

[0017] As a preferred solution of the present invention, a connecting plate is installed on the sliding block, a fixing seat is screwed on the connecting plate, a threaded hole is opened on the fixing seat, and a positioning hole is installed above the fixing seat.

[0018] As a preferred solution of the present invention, the slide groove below the fixed plate is also provided with the same structure, and the fixed seat here is arranged opposite to the fixed seat below, and the threaded holes on one side of the two groups of fixed seats are the same in number as the rotating drum and are in the same horizontal position, and a positioning block is installed under the fixed seat mentioned above, and the positioning block is arranged vertically and horizontally to the positioning hole.

[0019] In the above technical solution, compared with the prior art, the technical effects and advantages provided by the present invention are as follows:

[0020] By replacing the gas delivery pipe and the fixing seat with corresponding models according to the size of the closed valve flange to be tested, and the installation method of the bolts and the rotating cylinder, corresponding adjustments can be made according to the number and position of the vacancies in the closed valve flange, thereby improving the adaptability of the equipment, and through the cooperation of the bolts and the threaded holes, the flange ring and the fixing seat are fit with both sides of the closed valve flange to make the inside of the closed valve sealed. At this time, after the inside is pressurized through the air pump connecting pipe, the change of the internal air pressure is detected by the air pressure sensor to realize the airtightness detection of the closed valve. Through this structure, it can be realized whether the closed valve is leaking in a simulated working environment, so that the airtightness of the closed valve can be detected more intuitively, thereby improving the efficiency and effect of the detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2It is a schematic diagram of the layout structure of the fixing seat of the present invention;

[0024] Figure 3 It is a schematic diagram of the planing structure of the detection table and the fixing plate of the present invention;

[0025] Figure 4 It is a schematic diagram of the planing structure of the sliding seat of the present invention;

[0026] Figure 5 It is a schematic diagram of the planed structure of the connecting tube of the present invention;

[0027] Figure 6 For the present invention Figure 3 The enlarged structural diagram at A in the middle;

[0028] Figure 7 For the present invention Figure 4 The enlarged structural diagram at B in the middle;

[0029] Figure 8 For the present invention Figure 5 Enlarged structural diagram at point C in the middle.

[0030] Description of reference numerals:

[0031] 001, test bench; 101, connecting column; 102, guide rail; 103, servo motor one; 104, screw; 105, internal thread block; 106, fixing plate; 002, docking assembly; 201, electromagnetic rail; 202, sliding seat; 203, air pump connecting pipe; 204, gas delivery pipe; 205, flange ring; 206, rotating cylinder; 207, bolt; 208, air pressure sensor; 003, driving assembly; 301, gear one; 302, bearing; 303, connecting cylinder; 304, gear ring one; 305, gear ring two; 306, servo motor two; 307, gear two; 004, fixing assembly; 401, slide groove; 402, slide rod; 403, slider; 404, spring; 405, connecting plate; 406, fixing seat; 407, threaded hole; 408, positioning hole; 409, positioning block. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0033] The present invention provides Figure 1-8A closed valve air tightness detection device shown in the figure comprises a detection platform 001, four groups of connecting columns 101 are installed at the four corners above the detection platform 001, a guide rail 102 is installed on one side of the connecting column 101, a servo motor 103 is installed above the guide rail 102, a screw rod 104 is rotatably connected in the guide rail 102, and the screw rod 104 is axially connected to the output end of the servo motor 103, an internal thread block 105 is screwed on the screw rod 104, and a fixing plate 106 is installed between the four groups of internal thread blocks 105;

[0034] The servo motor 103 drives the screw 104 to rotate, so that the screw 104 drives the internal thread block 105 to slide in the guide rail 102, so that the four groups of internal thread blocks 105 drive the fixing plate 106 to move up and down along the four groups of connecting columns 101, and the four groups of servo motors 103 are driven and controlled synchronously.

[0035] The docking assembly 002 disposed above the test platform 001 includes electromagnetic slide rails 201, which are symmetrically mounted above the test platform 001. A sliding seat 202 is slidably connected above the two sets of electromagnetic slide rails 201, and a gas delivery pipe 204 is screwed to one side of the sliding seat 202.

[0036] The electromagnetic slide rail 201 can drive the sliding seat 202 to move above the detection platform 001, and the gas delivery pipe 204 is screwed so that corresponding replacement can be achieved according to the size of the sealing valve flange.

[0037] The driving assembly 003 disposed on the sliding seat 202 includes a bearing 302, the bearing 302 is sleeved and fixed on the gas delivery pipe 204, and a connecting tube 303 is sleeved and fixed on the outer side of the bearing 302;

[0038] The bearing 302 allows the connecting tube 303 to rotate freely on the surface of the gas delivery pipe 204 .

[0039] The fixing assembly 004 disposed above the detection platform 001 and below the fixing plate 106 includes slide grooves 401 . The slide grooves 401 are respectively opened on the surfaces of the detection platform 001 and the fixing plate 106 , and two groups of slide grooves 401 are disposed opposite to each other.

[0040] Furthermore, in the above structure, the docking assembly 002 also includes an air pump connecting pipe 203, which is installed on the side of the sliding seat 202 away from the gas delivery pipe 204, and the air pump connecting pipe 203 is connected to the pressurized air pump hose, and the air pump connecting pipe 203 is connected to the inside of the gas delivery pipe 204.

[0041] The pressurized air pump can deliver gas to the gas delivery pipe 204 through the air pump connecting pipe 203 .

[0042] Furthermore, in the above structure, a flange ring 205 is sleeved and fixed on one side of the gas delivery pipe 204, and a rotating drum 206 is rotatably connected to the flange ring 205, and multiple groups of rotating drums 206 are installed in a ring-shaped distribution.

[0043] Furthermore, in the above structure, a bolt 207 is screwed to one side of the rotating drum 206, an air pressure sensor 208 is installed on the inner wall of the gas delivery pipe 204, and the air pressure sensor 208 is wirelessly connected to the background computer.

[0044] Through multiple sets of rotating cylinders 206, the number of bolts 207 can be installed and adjusted according to the number of connection holes of the closed valve flange that need to be tested, and the installation rotation direction of the bolts 207 and the rotating cylinder 206 is opposite to the flange installation rotation direction of the bolts 207, thereby preventing the bolts 207 from detaching from the rotating cylinder 206 when the flange is installed, and the air pressure sensor 208 can detect the air pressure inside the gas delivery pipe 204 and the closed valve, thereby realizing the sealing test.

[0045] Furthermore, in the above structure, the driving assembly 003 also includes a gear 301, which is connected to the side of the rotating cylinder 206 away from the bolt 207, and a gear ring 304 is installed on the inner wall of the connecting cylinder 303, and the gear ring 304 is meshed with each group of gears 301.

[0046] The gear ring 1 304 can drive multiple sets of gears 1 301 to rotate, so that the rotating drum 206 drives multiple sets of bolts 207 to rotate.

[0047] Furthermore, in the above structure, a second gear ring 305 is installed on the inner wall of the connecting tube 303 , a second servo motor 306 is installed on the surface of the gas delivery pipe 204 , a second gear 307 is installed on the output end of the second servo motor 306 , and the second gear 307 is meshed with the second gear ring 305 .

[0048] The servo motor 2 306 drives the gear 2 307 to rotate, so that the gear 2 307 drives the gear ring 2 305 to rotate, and the gear ring 2 305 drives the connecting tube 303 to rotate as a whole, thereby realizing the rotation of the gear ring 1 304 .

[0049] Furthermore, in the above structure, the fixing component 004 also includes a slide rod 402, which is installed on the inner wall of each group of slide grooves 401, and a slider 403 is sleeved on the slide rod 402, and a spring 404 is sleeved on the slide rod 402, and the two sides of the spring 404 are respectively in contact with the slider 403 and the inner wall of the slide groove 401.

[0050] The position of the slider 403 on the slide bar 402 can be adjusted and maintained by the spring 404 .

[0051] Furthermore, in the above structure, a connecting plate 405 is installed on the slider 403 , a fixing seat 406 is screwed on the connecting plate 405 , a threaded hole 407 is opened on the fixing seat 406 , and a positioning hole 408 is installed above the fixing seat 406 .

[0052] By screwing the connecting plate 405 and the fixing seat 406 together, the fixing seat 406 can be replaced according to the size of the flange connection plate of the sealing valve. The screwing of the bolt 207 and the threaded hole 407 can move the fixing seat 406 and the sliding seat 202 toward the flange plate of the sealing valve respectively, thereby achieving sealing and fixing.

[0053] Furthermore, in the above structure, the slide groove 401 below the fixed plate 106 is also provided with the same structure, and the fixed seat 406 here is arranged opposite to the fixed seat 406 below, and the threaded holes 407 on one side of the two groups of fixed seats 406 are the same in number as the rotating drum 206 and are at the same horizontal position, and a positioning block 409 is installed under the upper fixed seat 406, and the positioning block 409 is arranged vertically and horizontally with the positioning hole 408.

[0054] Through the cooperation of the positioning block 409 and the positioning hole 408, the two sets of fixing seats 406 are merged up and down, thereby fixing the connecting pipes on both sides of the sealing valve.

[0055] like Figure 1-8As shown, the gas delivery pipe 204 and the fixing seat 406 of the corresponding size are replaced according to the size of the flange of the sealed valve to be detected. At this time, the connecting pipes on both sides of the sealed valve are clamped into the two groups of fixing seats 406 below. At this time, the fixing plate 106 is moved downward so that the upper fixing seat 406 fits with the lower fixing seat 406, so as to fix the sealed valve. At this time, according to the number of mounting bolts 207 required for the sealed valve, the bolts 207 of the corresponding position and number are installed in the corresponding rotating cylinder 206. At this time, the two groups of sliding seats 202 are driven to move, so that the bolts 207 pass through the flange of the sealed valve, and at the same time, one end of the bolt 207 contacts the edge of the threaded hole 407. At this time, the servo motor 2 306 is started to rotate each group of bolts 207 at the same time and cooperate with the threaded hole 407. , so that the fixed seat 406 drives the slider 403 to slide along the slide rod 402 and squeeze the spring 404 on one side, so that the fixed seat 406 is finally attached to one side of the flange of the closed valve, and at the same time, the flange ring 205 will be attached to the side opposite to the flange of the closed valve. At this time, the air pump delivers gas to the gas delivery pipe 204 and continuously delivers it to the closed valve. At this time, the air pressure sensor 208 performs real-time air pressure detection. When the air pressure continues to decrease, it indicates that there is an airtightness in the closed valve. If the air pressure remains unchanged, it indicates that the closed valve is normally sealed. Through this structure, the closed valve can automatically perform airtightness detection after flange docking installation, so that the closed valve can be leaked in a simulated working environment, so that the airtightness of the closed valve can be detected more intuitively, thereby improving the efficiency and effect of the detection.

[0056] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A device for detecting air tightness of a sealed valve, comprising a detection platform (001), characterized in that: Four groups of connecting columns (101) are installed at the four corners above the detection platform (001), a guide rail (102) is installed on one side of the connecting column (101), a servo motor (103) is installed above the guide rail (102), a screw rod (104) is rotatably connected inside the guide rail (102), and the screw rod (104) is axially connected to the output end of the servo motor (103), an internal thread block (105) is screwed on the screw rod (104), and a fixing plate (106) is installed between the four groups of internal thread blocks (105); The docking assembly (002) disposed above the detection platform (001) comprises electromagnetic slide rails (201), the electromagnetic slide rails (201) are symmetrically mounted above the detection platform (001), a sliding seat (202) is slidably connected above two groups of the electromagnetic slide rails (201), and a gas delivery pipe (204) is screwed to one side of the sliding seat (202); The driving assembly (003) disposed on the sliding seat (202) comprises a bearing (302), wherein the bearing (302) is sleeved and fixed on the gas delivery pipe (204), and a connecting tube (303) is sleeved and fixed on the outer side of the bearing (302); The fixing assembly (004) disposed above the detection platform (001) and below the fixing plate (106) comprises sliding grooves (401), wherein the sliding grooves (401) are respectively provided on the surfaces of the detection platform (001) and the fixing plate (106), and two groups of sliding grooves (401) are disposed opposite to each other.

2. The airtightness detection device for a sealed valve according to claim 1, characterized in that: The docking assembly (002) further comprises an air pump connecting pipe (203), which is mounted on a side of the sliding seat (202) away from the gas delivery pipe (204), and the air pump connecting pipe (203) is connected to a pressurized air pump hose, and the air pump connecting pipe (203) is connected to the inside of the gas delivery pipe (204).

3. The airtightness detection device for a sealed valve according to claim 2, characterized in that: A flange ring (205) is sleeved and fixed on one side of the gas delivery pipe (204), and a rotating drum (206) is rotatably connected to the flange ring (205), and multiple groups of rotating drums (206) are installed in a ring-shaped distribution.

4. The airtightness detection device for a sealed valve according to claim 3, characterized in that: A bolt (207) is threadedly connected to one side of the rotating drum (206), and an air pressure sensor (208) is installed on the inner wall of the gas delivery pipe (204), and the air pressure sensor (208) is wirelessly connected to the background computer.

5. The airtightness detection device for a sealed valve according to claim 1, characterized in that: The driving assembly (003) further comprises a gear one (301), wherein the gear one (301) is connected to a side of the rotating cylinder (206) away from the bolt (207), and a gear ring one (304) is installed on the inner wall of the connecting cylinder (303), and the gear ring one (304) is meshed with each group of gears one (301).

6. The airtightness detection device for a sealed valve according to claim 5, characterized in that: A second gear ring (305) is installed on the inner wall of the connecting tube (303), a second servo motor (306) is installed on the surface of the gas delivery pipe (204), a second gear (307) is installed on the output end of the second servo motor (306), and the second gear (307) is meshed with the second gear ring (305).

7. The airtightness detection device for a sealed valve according to claim 1, characterized in that: The fixing assembly (004) further comprises a slide bar (402), wherein the slide bar (402) is mounted on the inner wall of each group of slide grooves (401), wherein a slider (403) is sleeved on the slide bar (402), wherein a spring (404) is sleeved on the slide bar (402), and the two sides of the spring (404) are respectively in contact with the slider (403) and the inner wall of the slide groove (401).

8. The airtightness detection device for a sealed valve according to claim 7, characterized in that: A connecting plate (405) is installed on the sliding block (403), a fixing seat (406) is screwed on the connecting plate (405), a threaded hole (407) is opened on the fixing seat (406), and a positioning hole (408) is installed above the fixing seat (406).

9. The airtightness detection device for a sealed valve according to claim 1, characterized in that: The slide groove (401) below the fixed plate (106) is also provided with the same structure, and the fixed seat (406) here is arranged opposite to the fixed seat (406) below, and the threaded holes (407) on one side of the two groups of fixed seats (406) are the same in number as the rotating drum (206) and are at the same horizontal position, and a positioning block (409) is installed below the fixed seat (406) above, and the positioning block (409) and the positioning hole (408) are arranged vertically and horizontally.

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