CN115452274A - A gas tightness detection device for four-way valve - Google Patents

Abstract

The invention discloses an air tightness detection device for a four-way valve, which comprises a case, wherein a rotary column is rotatably connected to the case, the upper end of the rotary column is connected with a rotary table, one side of the case is connected with a supporting plate, the supporting plate is connected with a top plate, the top plate is connected with a first air cylinder, and the telescopic end of the first air cylinder is connected with a pressing plate; four groups of screw rod transmission mechanisms are arranged on the machine case and positioned at the periphery of the rotary table, and each group of screw rod transmission mechanisms is provided with a sliding seat; the four sliding seats are distributed in a cross shape, an air inlet pipe is arranged on the sliding seat on the left side, an air outlet pipe is arranged on the sliding seat on the right side, pressure gauges are connected to the air inlet pipe and the air outlet pipe, and the sliding seats on the front side and the rear side are provided with plugs. The four pipelines of the four-way valve can be simultaneously detected through the device, the detection of one pipeline is not needed, the detection efficiency is greatly improved, the detection result error is small, and the detection effect is good.

Description

A kind of air tightness testing device for four-way valve

technical field

The invention relates to the technical field of valve detection, in particular to an air tightness detection device for a four-way valve.

Background technique

Four-way valve, hydraulic valve term, is a control valve with four ports. Four-way valve is an indispensable part in refrigeration equipment. After the four-way valve is produced, the product needs to be tested, and the leak detection is an essential process. And because the four-way valve has four channels, when testing the air tightness, it needs to be tested one channel by one channel, resulting in low detection efficiency.

Contents of the invention

Aiming at the deficiencies of the prior art, the present invention provides an airtightness detection device for a four-way valve to solve the problem of low efficiency in the airtightness detection of the four-way valve at present.

In order to solve the above technical problems, the present invention provides the following technical solutions:

An air tightness detection device for a four-way valve, comprising a case, the case is connected with a rotating column through a rotating bearing, the upper end of the rotating post is connected with a turntable, one side of the case is connected with a support plate, and the support plate is connected with a top plate , the top plate is connected with the first cylinder, the telescopic end of the first cylinder passes through the top plate and the end is connected with a pressure plate, the pressure plate is located directly above the turntable; four sets of screw rods are arranged on the periphery of the turntable on the chassis Transmission mechanism, each set of screw drive mechanism is equipped with a slide seat, which is driven to slide through the screw drive mechanism; the four slide seats are distributed in a cross shape, the slide seat on the left is provided with an air intake pipe, and the slide seat on the right There is an air outlet pipe on the sliding seat, and a pressure gauge is connected to the air inlet pipe and the air outlet pipe. Blockages are provided on the sliding seats on the front and rear sides; an air pump is provided on one side of the inside of the chassis, and the air outlet end of the air pump is provided by The top of the case passes through and a corrugated hose is connected to the end through a flange. The other end of the corrugated hose is connected to the end of the intake pipe away from the turntable through a flange. Drive mechanism.

Preferably, a first motor is installed on the four slide seats, the output end of the first motor is connected to a transmission rod through a coupling, and a connecting block is connected to the transmission rod. The air inlet pipe, the air outlet pipe, The plugs are respectively connected to the connection blocks on the respective sides.

In the above technical scheme, when the four sliding seats are moving towards the turntable, the first motors on the four sliding seats work to drive the respective air intake pipes, air outlet pipes and blockages to rotate, so that the intake pipes, air outlet pipes and blockages can Quickly insert into the tubing of the four-way valve.

Preferably, each set of screw drive mechanisms includes two bearing seats connected to the chassis and located on the periphery of the turntable, screw rods rotatably connected to the two bearing seats, guide rails connected to the chassis and located on both sides of the screw mandrel, transmission The second motor is connected to the outer end of the screw rod, the bottom surface of the slide seat is provided with a slide groove, and is slidably connected to the guide rail through the slide groove, and the screw rod is threadedly connected with the slide seat.

In the above technical solution, the second motor works to drive the screw rod to drive, and the screw rod drives the sliding seat to move along the guide rail during the rotation of the screw rod.

Preferably, the drive mechanism includes a third motor arranged in the cabinet, the output end of the third motor is connected to a transmission shaft through a coupling, the transmission shaft is connected to a main gear, the rotating column is connected to a pinion gear, and the main gear meshes with the pinion.

In the above technical solution, the third motor works to drive the rotating column to rotate through the cooperation of the main gear and the auxiliary gear, thereby driving the turntable to rotate.

Preferably, the outer wall of the inlet pipe and the outlet pipe near the end of the turntable is provided with a first sealing groove, and a first sealing gasket is arranged in the first sealing groove; the outer wall of the block near the end of the turntable is provided with a second sealing groove, A second sealing gasket is arranged in the second sealing groove.

In the above technical solution, by setting the first gasket, the connection between the inlet pipe and the outlet pipe and the four-way valve can be in a sealed state; by setting the second gasket, the connection between the plug and the four-way valve can also be in a sealed state .

Preferably, clamping mechanisms are provided on both sides of the turntable, and the clamping mechanism includes a second cylinder arranged on both sides of the turntable, and a splint connected to the upper end of the second cylinder, and the two splints are arranged opposite to each other.

In the above technical solution, after the four-way valve is placed on the turntable, the second cylinder shrinks to drive the splint down, so that the splint is tightly pressed on the four-way valve, and the four-way valve is further kept stable.

Preferably, a controller is also provided in the cabinet, and a control button is provided on the front side of the cabinet, and the first cylinder, the air pump, the first motor, the second motor, the third motor, the second cylinder and the control button are respectively connected with The controller is electrically connected.

In the above technical solution, the controller controls each component to work in an orderly manner, and the control button is used to start and control the device to work.

Compared with the prior art, the present invention has the following beneficial effects:

Fix the four-way valve on the turntable, connect the intake pipe, the outlet pipe and the two symmetrical pipes of the four-way valve, connect the two plugs with the remaining two channels of the four-way valve, and observe and record the progress by ventilating the four-way valve. The pressure gauges on the trachea and the outlet pipe, if there is a difference in value between the two pressure gauges, it means that the airtightness is poor, if there is no difference in value, it means that the airtightness is good. Turn the two pipes to the direction of the air inlet pipe and the air outlet pipe, and carry out testing, and record the pressure gauge value according to the above method to judge the air tightness. It can be seen from this that the four pipelines of the four-way valve can be detected through the device, without the need to detect one pipeline by one pipeline, which greatly improves the detection efficiency, and the error of the detection result is small, and the detection effect is good.

Description of drawings

Fig. 1 is the top view of the present invention after removing top plate;

Fig. 2 is the front view of the present invention after removing the front and rear screw drive mechanisms on both sides;

Fig. 3 is a side view of the present invention after the left and right screw drive mechanisms are removed;

Fig. 4 is the schematic diagram of intake pipe;

Fig. 5 is the schematic diagram of blocking;

In the figure: 1-chassis, 2-rotary column, 3-turntable, 4-support plate, 5-top plate, 6-first cylinder, 7-pressure plate, 8-screw drive mechanism, 8a-bearing seat, 8b-wire Rod, 8c-guide rail, 8d-second motor, 9-slider, 10-intake pipe, 11-outlet pipe, 12-pressure gauge, 13-block, 14-air pump, 15-corrugated hose, 16-drive mechanism , 16a-third motor, 16b-main gear, 16c-pinion, 17-first motor, 18-connecting block, 19-clamping mechanism, 19a-second cylinder, 19b-splint, 20-first gasket , 21-the second gasket, 22-four-way valve.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to Figure 1-3, an air tightness detection device for four-way valves, including a chassis 1, a rotating column 2 is connected to the chassis 1 through a rotating bearing, and a turntable 3 is connected to the upper end of the rotating column 2, and the body of the chassis 1 One side is connected with a support plate 4, the support plate 4 is connected with a top plate 5, the top plate 5 is connected with a first cylinder 6, the telescopic end of the first cylinder 6 passes through the top plate and the end is connected with a pressing plate 7, the pressing plate 7 is located directly above the turntable 3; the casing 1 is provided with four sets of screw drive mechanisms 8 on the periphery of the turntable, and each set of screw drive mechanisms 8 is provided with a sliding seat 9, and each set of screw drive mechanisms 8 includes Two bearing housings 8a connected to the chassis 1 and located on the periphery of the turntable 3, screw rods 8b connected to the two bearing housings 8a in rotation, guide rails 8c connected to the housing 1 and located on both sides of the screw rods 8b, transmission connected to the screw rods The second motor 8d at the outer end of 8b, the bottom surface of the sliding seat 9 is provided with a chute, and is slidably connected to the guide rail 8c through the chute, the screw 8b is threadedly connected with the sliding seat 9, and driven by the screw drive mechanism The sliding seat 9 slides along the guide rail 8c.

The four slides 9 are distributed in a cross shape, the slide 9 on the left side is provided with an air intake pipe 10, the slide 9 on the right side is provided with an air outlet pipe 11, and the air intake pipe 10 and the air outlet pipe 11 are connected with pressure Table 12, the sliding seats on the front and rear sides are provided with plugs 13; one side inside the cabinet 1 is provided with an air pump 14, and the outlet end of the air pump 14 passes through the top of the cabinet and the passing end is connected with corrugated flanges. The hose 15, the other end of the corrugated hose 15 is flanged to the end of the intake pipe 10 away from the turntable 3, and the other side inside the cabinet 1 is provided with a drive mechanism 16 for driving the rotation of the rotating column 2.

In this embodiment, the first motor 17 is installed on the four slide seats 9, and the output end of the first motor 17 is connected to a transmission rod through a coupling, and a connecting block 18 is connected to the transmission rod. 10. The air outlet pipe 11 and the plug 13 are respectively connected to the connection blocks 18 on their respective sides. When the four sliding seats 9 are moving towards the direction of the turntable 3, the first motor 17 on the four sliding seats 9 works to drive the air inlet pipe 10, the air outlet pipe 11 and the plug 13 on the respective rotations, so that the air inlet pipe 10, the outlet pipe The trachea 11 and the stopper 13 can be quickly inserted into the pipeline of the four-way valve 22 .

In this embodiment, the drive mechanism 16 includes a third motor 16a arranged in the cabinet 1, the output end of the third motor 16a is connected to a transmission shaft through a coupling, the transmission shaft is connected to a main gear 16b, and the rotating column 2 A pinion gear 16c is connected to the top, and the main gear 16b meshes with the pinion gear 16c. The third motor 16a works to drive the rotating column 2 to rotate through the cooperation of the main gear 16b and the auxiliary gear 16c, thereby driving the turntable 3 to rotate.

In this embodiment, clamping mechanisms 19 are provided on both sides of the turntable 3, and the clamping mechanism 19 includes a second cylinder 19a arranged on both sides of the turntable 3, a splint 19b connected to the upper end of the second cylinder 19a, The two splints 19b are oppositely arranged. After the four-way valve 22 is placed on the turntable 3, the second cylinder 19a shrinks, driving the splint 19b to descend, so that the splint 19b is tightly pressed on the four-way valve 22, and further keeps the four-way valve stable.

In this embodiment, a controller (not shown in the accompanying drawings) is also provided in the cabinet 1, and a control button is provided on the front side of the cabinet 1. The first cylinder 6, the air pump 14, the first motor 17, the second The motor 8d, the third motor 16a, the second cylinder 19a, and the control button are respectively electrically connected to the controller. The controller controls each component to work in an orderly manner, and the control button is used to start and control the work of the device.

In this embodiment, the outer walls of the inlet pipe 10 and the outlet pipe 11 near the end of the turntable 3 are provided with a first sealing groove, and a first sealing gasket 20 is arranged in the first sealing groove; The outer wall is provided with a second sealing groove, and a second sealing gasket 21 is arranged in the second sealing groove. By arranging the first gasket 20, the connection between the inlet pipe 10 and the outlet pipe 11 and the four-way valve 22 can be sealed; by arranging the second gasket 21, the connection between the plug 13 and the four-way valve 22 can also be in a sealed state.

Working principle of the present invention is:

Place the four-way valve 22 on the turntable 3, control the extension of the first cylinder 6, drive the pressure plate 7 to descend and press the four-way valve 22 tightly on the turntable 3, then control the second motor 8d to work, drive the screw rod 8b to rotate, and the screw rod 8b to rotate. During the rotation of the rod 8b, the sliding seat 9 is driven to move toward the four-way valve 22 along the guide rail 8c, so that the inlet pipe 10 and the outlet pipe 11 are connected with the two symmetrical pipes on the four-way valve, so that the two plugs are connected with the remaining two pipes of the four-way valve 22. Butt the pipes, then connect the corrugated hose 15 and the intake pipe 10 through the flange; then start the air pump 14 to ventilate into the four-way valve, the air enters through the intake pipe 10 and is discharged from the outlet pipe 11, during which the pressure is observed and recorded The values in Table 12, when the pressure gauges 12 remain stable, observe for a period of time, if the values of the two pressure gauges 12 are the same, it means that the two pipelines tested by the four-way valve have good airtightness, if the two pressure gauges have the same value Poor, it means that the airtightness of the two pipelines detected by the four-way valve is poor. Carry out detection, record the pressure gauge value according to the above method, to judge the air tightness of the remaining two pipelines, so as to realize the air tightness detection of four pipelines at one time, and greatly improve the detection efficiency.

It should be noted that the terms "comprising", "comprising" or any other variation thereof are intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements, but also includes none other elements specifically listed, or also include elements inherent in such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications and substitutions can be made to these embodiments without departing from the principle and spirit of the present invention. and modifications, the scope of the invention is defined by the appended claims and their equivalents.

Claims (8)

1. An air tightness detection device for a four-way valve, characterized in that it comprises a casing (1), the casing (1) is connected with a rotating column (2) by a rotating bearing, and the upper end of the rotating column (2) is connected Turntable (3) is arranged, one side of cabinet (1) is connected with support plate (4), is connected with top plate (5) on support plate (4), is connected with the first air cylinder (6) on the top plate (5), the first The telescoping end of the cylinder (6) passes through the top plate and is connected with a pressure plate (7) through the end, and the pressure plate (7) is located directly above the turntable (3); Four sets of screw drive mechanisms (8), each set of screw drive mechanisms (8) are provided with slide seats (9), which drive the slide seats (9) to slide through the screw drive mechanisms (8); the four slides Seats (9) are distributed in a cross shape, the slide seat (9) on the left side is provided with an air inlet pipe (10), the slide seat (9) on the right side is provided with an air outlet pipe (11), the air inlet pipe (10) and the outlet pipe A pressure gauge (12) is connected to the trachea (11), and a stopper (13) is provided on the sliding seats on the front and rear sides; an air pump (14) is provided on one side of the cabinet (1), and the air pump (14 ) through the top of the chassis and the corrugated hose (15) is connected through the end through the flange, and the other end of the corrugated hose (15) and the end of the air inlet pipe (10) away from the turntable (3) are passed through the flange connected, the other side inside the cabinet (1) is provided with a drive mechanism (16) for driving the rotating column (2) to rotate. 2. The air tightness detection device for four-way valve according to claim 1, characterized in that: first motors (17) are installed on the four slide seats (9), and the first motors (17) ) is connected to a transmission rod through a coupling, and a connection block (18) is connected to the transmission rod, and the inlet pipe (10), the outlet pipe (11), and the plug (13) are respectively connected to on the connecting block(18) on one side. 3. The air tightness detection device for four-way valves according to claim 2, characterized in that: each set of said screw drive mechanism (8) includes a motor connected to the chassis (1) and located on the turntable (3) Two outer bearing housings (8a), screw rods (8b) rotatably connected to the two bearing housings (8a), guide rails (8c) connected to the chassis (1) and located on both sides of the screw rods (8b), transmission connections On the second motor (8d) at the outer end of the screw rod (8b), the bottom surface of the slide seat (9) is provided with a chute, and is slidably connected to the guide rail (8c) through the chute, and the screw rod (8b) and The sliding seat (9) is threaded. 4. The air tightness detection device for four-way valve according to claim 3, characterized in that: the drive mechanism (16) includes a third motor (16a) arranged in the chassis (1), the third The output end of motor (16a) is connected with transmission shaft by coupling, is connected with main gear (16b) on the transmission shaft, is connected with auxiliary gear (16c) on the rotating column (2), main gear (16b) and auxiliary gear ( 16c) Engagement. 5. The air tightness detection device for four-way valves according to claim 4, characterized in that: both sides of the turntable (3) are provided with clamping mechanisms (19), and the clamping mechanisms ( 19) It includes a second cylinder (19a) arranged on both sides of the turntable (3), a splint (19b) connected to the upper end of the second cylinder (19a), and the two splints (19b) are oppositely arranged. 6. The air tightness detection device for four-way valve according to claim 5, characterized in that: a controller is also provided in the cabinet (1), and a control button is provided on the front side of the cabinet (1), The first cylinder (6), the air pump (14), the first motor (17), the second motor (8d), the third motor (16a), the second cylinder (19a), and the control button are electrically connected to the controller respectively . 7. The air tightness detection device for four-way valve according to claim 6, characterized in that: the outer walls of the inlet pipe (10) and the outlet pipe (11) near the end of the turntable (3) are provided with a second A sealing groove, the first sealing gasket (20) is arranged in the first sealing groove. 8. The air tightness detection device for four-way valve according to any one of claims 1-7, characterized in that: the outer wall of the plug (13) near the end of the turntable (3) is provided with a second sealing groove , a second gasket (21) is arranged in the second sealing groove.

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