CN115435977B

CN115435977B - Plug valve pressure testing device

Info

Publication number: CN115435977B
Application number: CN202211387890.7A
Authority: CN
Inventors: 陈飞
Original assignee: Jiangsu Xindingyuan Technology Co ltd
Current assignee: Jiangsu Xindingyuan Technology Co ltd
Priority date: 2022-11-08
Filing date: 2022-11-08
Publication date: 2023-02-03
Anticipated expiration: 2042-11-08
Also published as: CN115435977A

Abstract

The invention discloses a plug valve pressure test device, which relates to the technical field of plug valve manufacturing and comprises a negative pressure assembly, wherein the negative pressure assembly comprises at least one opening and closing box, two oil paths are fixedly arranged at two ends of the opening and closing box, one end of each oil path is sealed, the other end of each oil path is connected with an oil outlet of an oil pressure assembly, a left sealing plate and a right sealing plate are slidably arranged in the opening and closing box, and the opening and closing box is fixedly arranged on a vacuum box. According to the invention, by arranging the detection assembly, when the plug valve leaks, a specific leakage position can be detected, and if batch faults occur, targeted improvement on the plug valve at a later stage is facilitated; through the arrangement of the negative pressure assembly, the whole process of detecting the sealing property of the plug valve is cleaner and tidier, and oil stains can not appear after detection; a plurality of plug valves can be detected simultaneously, and therefore the detection efficiency of the plug valves is improved.

Description

Plug valve pressure testing device

Technical Field

The invention relates to the technical field of plug valve manufacturing, in particular to a plug valve pressure testing device.

Background

The plug valve is a rotary valve in a closing part or a plunger shape, and the opening or the closing of the valve is realized by rotating 90 degrees to enable a passage port on the plug to be communicated with or separated from a passage port on the valve body. The valve plug may be cylindrical or conical in shape. In a cylindrical valve plug, the passageway is generally rectangular; whereas in a tapered plug the passageway is trapezoidal. These shapes make the construction of the plug valve lightweight. The invention is most suitable for use as a medium for switching off and on and for shunting, but may also be used for throttling, depending on the nature of the application and the erosion resistance of the sealing surfaces. In order to ensure the reliability of the plug valve after installation, the plug valve needs to be subjected to a sealing test after production or before use.

The plug valve pressure testing device is characterized in that a middle plate is arranged above a bottom plate side by side, a cylinder sleeve is fixed between the two plates, and the bottom plate and the middle plate are tightened through a first bolt; the top plate is arranged right above the middle plate, the two plates are fixed through a second bolt, and the top plate is provided with an observation hole; a pressure test blind plate is arranged on a lower support plate in the support assembly, and an oil inlet hole is formed in the pressure test blind plate; the front side of the upper supporting plate is provided with a positioning notch, the lower supporting plate and a first sliding sleeve at the right end of the upper supporting plate are movably sleeved on one of the second bolts, the left ends of the lower supporting plate and the upper supporting plate are fixed through a connecting plate, and the second sliding sleeves at the upper part and the lower part of the connecting plate are sleeved on the other second bolt in a hollow manner. The prior art abandons the pipe joint in the prior art, so need not hard to go to connect the pipe joint, the replacement is sealed two ports of plug valve through the board, pours into pressure oil again and carries out the pressure testing. However, in the prior art, after the test, oil stains are generated inside the plug valve, and the fault position of the plug valve cannot be detected.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides the following technical scheme: a plug valve pressure testing device comprises a negative pressure assembly, wherein the negative pressure assembly comprises at least one opening and closing box, two ends of the opening and closing box are fixedly provided with two oil paths, one end of each oil path is sealed, the other end of each oil path is connected with an oil outlet of an oil pressure assembly, a left sealing plate and a right sealing plate are slidably arranged in the opening and closing box, and the opening and closing box is fixedly arranged on a vacuum box; still include the determine module, the determine module includes annular rainfall detector, and annular rainfall detector rotates and installs on U-shaped frame, and the last swing gear that still rotates of U-shaped frame is installed, and swing gear is fixed with annular rainfall detector, and swing gear and the synchronous rotation of annular rainfall detector, and fixed mounting has the level that keeps the pole parallel with annular rainfall detector edge on the swing gear, the top position fixed mounting that the case that opens and shuts is located the level and keeps the pole has the spring beam of two symmetries settings, and the side of U-shaped frame is provided with the swing rack, swing rack and swing gear cooperation.

Preferably, the opening and closing box is communicated with the inside of the oil way, rubber ring pads are lapped on the left side sealing plate and the right side sealing plate, a water storage tank is placed on the rubber ring pads, and a sealing coating is arranged at the position, in contact with the opening and closing box, of the water storage tank.

Preferably, two through holes are formed in the vacuum box, a vacuum pump is fixedly installed at one through hole, and an air inlet valve plate is installed at the other through hole in a sliding mode through the air inlet valve plate frame.

Preferably, there is a detection table in the vacuum box through detection table support fixed mounting, and the detection table has a placing panel through a lifting rod sliding mounting, and the outer side of the lifting rod is surrounded by a spring, and two ends of the spring are respectively fixedly connected with the placing panel and the detection table.

Preferably, the swing rack is fixedly installed on the detection table, the detection table is further fixedly installed with a gearbox, an input gear is fixedly installed on an input shaft of the gearbox, a lifting plate is fixedly installed at the bottom end of the lifting rod, and an input rack meshed with the input gear is fixedly installed on the lifting plate.

Preferably, a driving gear is fixedly mounted on an output shaft of the gearbox, a tooth form is arranged on the U-shaped frame, and the driving gear is meshed with the U-shaped frame.

Preferably, the central position of detecting the platform puts slidable mounting and has rainfall detection pole, and the bottom fixed mounting of rainfall detection pole has the magnetic attraction board, U-shaped frame slidable mounting is on U-shaped frame slide bar, and U-shaped frame slide bar fixed mounting is on detecting platform or vacuum box.

Preferably, the U-shaped frame is fixedly provided with a permanent magnet, the permanent magnet is matched with the magnetic attraction plate in a magnetic attraction manner, the detection table support is fixedly provided with a limiting rod, and the limiting rod is matched with the magnetic attraction plate in a contact manner.

Compared with the prior art, the invention has the following beneficial effects: (1) According to the invention, by arranging the detection component, when the plug valve leaks, the specific leakage position can be detected, and if batch faults occur, the targeted improvement on the plug valve in the later period is facilitated; (2) According to the invention, the negative pressure assembly is arranged, so that the whole process of detecting the sealing property of the plug valve is cleaner and tidier, and oil stains can not appear after detection; (3) The plug valve detection device can detect a plurality of plug valves simultaneously, so that the detection efficiency of the plug valves is improved.

Drawings

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

FIG. 2 is a sectional view of the structure of the vacuum box of the present invention.

FIG. 3 is a schematic view of the structure of the rubber gasket of the present invention.

FIG. 4 is a view of the deployed positions of the left and right sealing plates of the present invention.

FIG. 5 is a view of the closed position of the left and right seal plates of the present invention.

FIG. 6 is a schematic view of a detecting assembly according to the present invention.

Fig. 7 is a schematic view of the structure of the valve stem of the present invention.

FIG. 8 is a schematic view of the U-shaped frame of the present invention.

FIG. 9 is a schematic view of the structure of the position A in FIG. 8 according to the present invention.

Fig. 10 is a schematic structural view of a rainfall detection rod according to the present invention.

Fig. 11 is a schematic structural diagram of an input rack according to the present invention.

Fig. 12 is a schematic view of the structure of the annular rainfall detector of the present invention.

In the figure: 101-a water reservoir; 102-opening and closing box; 103-oil pressure assembly; 104-oil path; 105-a vacuum pump; 106-vacuum box; 107-inlet grillage; 1071-air inlet valve plate; 108-rubber ring pad; 109-left side seal plate; 110-right side seal plate; 201-detection table; 202-test table support; 203-a limiting rod; 204-a U-shaped frame slide bar; 205-a U-shaped frame; 206-placing the panel; 207-annular rain detector; 208-a spring rod; 209-horizontal holding rod; 210-a wobble gear; 211-a swing rack; 212-a spring; 213-lifting rod; 214-a lifter plate; 215-magnetic attraction plate; 216-a permanent magnet; 217-input gear; 218-an input rack; 219-a gearbox; 220-a drive gear; 221-rainfall detection rod; 3-plug valve; 301-valve stem.

Detailed Description

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

As shown in fig. 1 to 3, the present invention provides a technical solution: the utility model provides a plug valve pressure testing device, including the negative pressure subassembly, the negative pressure subassembly includes at least one case 102 that opens and shuts, the both ends fixed mounting of case 102 that opens and shuts has two oil circuits 104, wherein one end of oil circuit 104 is sealed, the other end of oil circuit 104 is connected with the oil-out of oil pressure subassembly 103, the inside slidable mounting of case 102 that opens and shuts has left side closing plate 109 and right side closing plate 110, case 102 fixed mounting opens and shuts is on vacuum box 106, the inside intercommunication of case 102 and oil circuit 104 opens and shuts, the overlap joint has rubber circle pad 108 on left side closing plate 109 and the right side closing plate 110, cistern 101 has been placed on rubber circle pad 108, the position that cistern 101 and case 102 that opens and shuts contacted is provided with sealing coating, two through-holes have been seted up on the vacuum box 106, one of them through-hole department fixed mounting has vacuum pump 105, another through-hole department has air inlet valve plate frame 1071 through air intake valve 107 slidable mounting.

As shown in fig. 4-12, the device further comprises a detection assembly, the detection assembly comprises an annular rainfall detector 207, the annular rainfall detector 207 is rotatably mounted on a U-shaped frame 205, a swing gear 210 is further rotatably mounted on the U-shaped frame 205, the swing gear 210 is fixed with the annular rainfall detector 207, the swing gear 210 and the annular rainfall detector 207 rotate synchronously, a horizontal holding rod 209 parallel to the edge of the annular rainfall detector 207 is fixedly mounted on the swing gear 210, two symmetrically arranged spring rods 208 are fixedly mounted on the opening and closing box 102 above the horizontal holding rod 209, a swing rack 211 is arranged on the side of the U-shaped frame 205, the swing rack 211 is matched with the swing gear 210, a detection platform 201 is fixedly mounted in a vacuum box 106 through a detection platform bracket 202, the detection platform 201 is slidably mounted through a lifting rod 213, a spring 212 is wound around the outer side of the lifting rod 213, two ends of the spring 212 are respectively fixedly connected with a placing panel 206 and the detection platform, the detection platform is fixedly connected with the swinging rack 211 is fixedly mounted on the detection platform 201, a gearbox 219 is further fixedly mounted on the detection platform 201, a vacuum shaft 217 fixedly mounted on an input shaft of the gearbox 219, a slide rod 217 fixedly mounted on a fixed with a U-shaped rack 220, a permanent magnet 220 mounted on a fixed on a U-shaped frame 220, a U-shaped frame 220 and a U-shaped rack 220 mounted on a fixed rack 220, a fixed gear 220, a U-shaped rack 220, a fixed rack 220 and a U-shaped rack 220 mounted on a fixed rack 220, a U-shaped rack 220, a fixed gear rack 220, a permanent magnet 220, the permanent magnet 216 is matched with the magnetic attraction plate 215 in a magnetic attraction manner, the limit rod 203 is fixedly mounted on the detection table support 202, and the limit rod 203 is matched with the magnetic attraction plate 215 in a contact manner.

The working principle of the plug valve pressure testing device disclosed by the invention is as follows: when the plug valve 3 is used, firstly, the plug valve 3 is rotated to a closed state, then, the plug valve is put into the vacuum box 106 through the through hole in the middle of the opening and closing box 102, when the plug valve 3 is contacted with the placing panel 206, because the self weight of the plug valve 3 can compress the spring 212, at the moment, the lifting rod 213 moves downwards, the lifting plate 214 can synchronously move along with the lifting rod 213, the lifting plate 214 moves to drive the input rack 218 to move, the input rack 218 moves to drive the input gear 217 to rotate, the input gear 217 rotates to drive the driving gear 220 to rotate through the gearbox 219, the driving gear 220 rotates to drive the U-shaped frame 205 to move upwards, the U-shaped frame 205 moves upwards to drive the annular rainfall detector 207 to move from the position shown in figure 12 to the position shown in figure 6, and at the same time, the ends of the two spring rods 208 abut against the two ends of the horizontal holding rod 209, so that the horizontal holding rod 209 is in a horizontal state, and further, the annular rainfall detector 207 is also in a horizontal state, at this time, the oil pressure assembly 103 (the oil pressure assembly 103 is composed of an oil pump and an oil tank) is controlled, the oil pressure assembly 103 increases the pressure inside the opening and closing box 102, so that the left sealing plate 109 and the right sealing plate 110 move from the position shown in fig. 4 to the position shown in fig. 5, and simultaneously clamp the plug valve 3, then the rubber ring pad 108 is placed on the edge of the top of the plug valve 3, then the reservoir 101 is placed on the plug valve 3, and it should be noted that the bottom of the reservoir 101 is provided with through holes, the positions of the through holes correspond to the positions of the flanges of the plug valve 3, and then a proper amount of water is filled into the reservoir 101. The vacuum pump 105 is controlled to be started, the inside of the vacuum box 106 is pumped into negative pressure, when the plug valve 3 is not sealed well, if the valve rod 301 is leaked, water in the reservoir 101 can flow to the annular rainfall detector 207, when the valve core in the plug valve 3 leaks, water in the reservoir 101 can flow to the rainfall detection rod 221, and whether the sealing performance of the plug valve 3 is qualified or not can be judged by detecting electric signals on the annular rainfall detector 207 and the rainfall detection rod 221. After the detection is completed, the water reservoir 101 and the rubber ring pad 108 are taken away, the left sealing plate 109 and the right sealing plate 110 are controlled to be slowly opened by the oil pressure assembly 103, the plug valve 3 is taken out of the vacuum box 106, meanwhile, when the plug valve 3 is separated from the placing panel 206, the placing panel 206 moves upwards under the elastic force of the spring 212, the synchronous lifting rod 213 moves upwards, the lifting plate 214 drives the input rack 218 to move synchronously, the U-shaped frame 205 is driven to move downwards through the input gear 217, the gearbox 219 and the driving gear 220, the U-shaped frame 205 drives the annular rainfall detector 207 to move from the position shown in fig. 6 to the position shown in fig. 12, at the moment, the swinging gear 210 is meshed with the swinging rack 211, and at the moment, the annular rainfall detector 207 tilts. Because there is water on plug valve 3, in the actual operation process, on having avoided the unexpected drop of water to drop annular rainfall detector 207 or rainfall detection pole 221, in order to prevent the wrong report, take out air intake valve plate 1071 and air intake valve grillage 107, start vacuum pump 105 again, then the air will follow air intake valve grillage 107 and get into, flow to vacuum pump 105 in through annular rainfall detector 207 and rainfall detection pole 221, can put heating device in air intake valve grillage 107 department if necessary, heat the air, thereby the speed of drying with higher speed. As shown in fig. 12, when the airflow passes through the inclined annular rainfall detector 207, turbulence is formed on the back of the left end of the annular rainfall detector 207, and at this time, water on the annular rainfall detector 207 is also blown by the airflow, so that the drying effect of the annular rainfall detector 207 is improved. If the annular rain detector 207 is dried in a horizontal state, the water inside the annular rain detector 207 is hardly blown by the flowing air. Synchronously, the rainfall detection rod 221 will follow the magnetic attraction plate 215 to move, and the magnetic attraction plate 215 will follow the U-shaped frame 205 under the action of the permanent magnet 216.

Although embodiments of the present invention have been shown and described, 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 scope of which is defined in the appended claims and their equivalents.

Claims

1. The plug valve pressure testing device is characterized in that: the oil pressure control device comprises a negative pressure assembly, wherein the negative pressure assembly comprises at least one opening and closing box (102), two oil passages (104) are fixedly mounted at two ends of the opening and closing box (102), one end of each oil passage (104) is sealed, the other end of each oil passage (104) is connected with an oil outlet of an oil pressure assembly (103), a left sealing plate (109) and a right sealing plate (110) are slidably mounted in the opening and closing box (102), and the opening and closing box (102) is fixedly mounted on a vacuum box (106);

still include detection element, detection element includes annular rainfall detector (207), and annular rainfall detector (207) rotate to be installed on U-shaped frame (205), still rotate on U-shaped frame (205) and install swing gear (210), and swing gear (210) are fixed with annular rainfall detector (207), and swing gear (210) and annular rainfall detector (207) synchronous revolution, and fixed mounting has horizontal holding pole (209) parallel with annular rainfall detector (207) edge on swing gear (210), open and shut case (102) are located the top position fixed mounting that horizontal holding pole (209) has two spring levers (208) that the symmetry set up, and the side of U-shaped frame (205) is provided with swing rack (211), swing rack (211) and swing gear (210) cooperation.

2. The plug valve pressure testing device according to claim 1, characterized in that: the oil circuit is characterized in that the opening and closing box (102) is communicated with the inside of the oil circuit (104), a rubber ring pad (108) is lapped on the left side sealing plate (109) and the right side sealing plate (110), a water storage tank (101) is placed on the rubber ring pad (108), and a sealing coating is arranged at the position where the water storage tank (101) is in contact with the opening and closing box (102).

3. The plug valve pressure testing device according to claim 2, characterized in that: two through holes are formed in the vacuum box (106), a vacuum pump (105) is fixedly mounted at one through hole, and an air inlet valve plate (1071) is slidably mounted at the other through hole through an air inlet valve plate frame (107).

4. The plug valve pressure testing device according to claim 3, characterized in that: the vacuum box (106) is internally and fixedly provided with a detection table (201) through a detection table bracket (202), the detection table (201) is provided with a placing panel (206) through a lifting rod (213) in a sliding manner, the outer side of the lifting rod (213) is surrounded by a spring (212), and two ends of the spring (212) are respectively and fixedly connected with the placing panel (206) and the detection table (201).

5. The plug valve pressure testing device of claim 4, which is characterized in that: swing rack (211) fixed mounting still fixed mounting have gearbox (219) on examining test table (201), fixed mounting has input gear (217) on the input shaft of gearbox (219), and the bottom fixed mounting of lifter (213) has lifter plate (214), and fixed mounting has input rack (218) with input gear (217) meshing on lifter plate (214).

6. The plug valve pressure testing device of claim 5, which is characterized in that: a driving gear (220) is fixedly mounted on an output shaft of the gearbox (219), a tooth form is arranged on the U-shaped frame (205), and the driving gear (220) is meshed with the U-shaped frame (205).

7. The plug valve pressure testing device according to claim 6, characterized in that: a rainfall detection rod (221) is arranged at the center of the detection table (201) in a sliding mode, a magnetic suction plate (215) is fixedly arranged at the bottom end of the rainfall detection rod (221), the U-shaped frame (205) is arranged on a U-shaped frame sliding rod (204) in a sliding mode, and the U-shaped frame sliding rod (204) is fixedly arranged on the detection table (201) or the vacuum box (106).

8. The plug valve pressure testing device of claim 7, which is characterized in that: the magnetic attraction type detection platform is characterized in that a permanent magnet (216) is fixedly mounted on the U-shaped frame (205), the permanent magnet (216) and the magnetic attraction plate (215) are in magnetic attraction fit, a limiting rod (203) is fixedly mounted on the detection platform support (202), and the limiting rod (203) and the magnetic attraction plate (215) are in contact fit.