CN116773103A - Plastic bottle negative pressure detection device - Google Patents

Abstract

The invention discloses a plastic bottle negative pressure detection device which is used for detecting the tightness of a plastic bottle body and comprises a water tank for containing water and an air extracting pump for extracting air to generate a negative pressure environment, wherein the upper end of the water tank is opened, and a drain valve is fixedly arranged at the lower end of the water tank in a penetrating way; the upper end of the water tank is fixedly provided with a surrounding cylinder, the bottom surface of the water tank is fixedly provided with a rack, the rack and the side wall of the water tank are arranged at intervals, a guide structure and a mounting frame are respectively fixedly arranged at the rear part of the upper end and the front part of the upper end of the rack, a plastic bottle clamping structure is arranged in the guide structure in a sliding manner, a position adjusting structure is inserted and movably installed at the upper end of the mounting frame, the position adjusting structure is in transmission connection with the plastic bottle clamping structure, and the plastic bottle body is inserted into the upper end of the plastic bottle clamping structure. The negative pressure detection device for the plastic bottle can enable the plastic bottle body which is qualified in detection to return to a production line again to be processed into products for sale, can greatly reduce the cost caused by detection, has high practicability and can promote economic benefits.

Description

Plastic bottle negative pressure detection device

Technical Field

The invention relates to the technical field of airtight detection, in particular to a negative pressure detection device for a plastic bottle.

Background

The plastic bottle consists of a plastic bottle body and a bottle cap, wherein the bottle cap is arranged at the opening of the bottle body in a covering manner in a threaded connection manner and seals the opening of the bottle body. The plastic bottle auxiliary detecting device is an auxiliary device for testing the tightness of plastic bottles, and is widely used in the field of plastic processing.

In the prior art, the patent number is CN 103557997A's plastic bottle negative pressure detection device for detect the leakproofness of junction behind plastic bottle body and the bottle lid connection, utilize the mode of pressurization to realize pressure differential, thereby observe the interior gas overflow condition of sample and judge the sealed effect of junction behind plastic bottle body and the bottle lid connection. In the above patent, when negative pressure detection is performed on a plastic bottle, the plastic bottle body needs to be cut off, so that the plastic bottle body and the bottle cap can be connected together and then put into the detection device, and therefore, no matter how the sealing effect of the connecting part between the plastic bottle body and the bottle cap is achieved, the plastic bottle body needs to be scrapped, the production cost of the plastic bottle can be increased, and especially when the number of the plastic bottles for negative pressure detection is large, the increased cost can be increased. Therefore, we propose a plastic bottle negative pressure detection device.

Disclosure of Invention

The invention mainly aims to provide a plastic bottle negative pressure detection device which can effectively solve the problems in the background technology.

In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:

the plastic bottle negative pressure detection device is used for detecting the tightness of a plastic bottle body and comprises a water tank for containing water and an air pump for exhausting air to generate a negative pressure environment, wherein the upper end of the water tank is opened, the lower end of the water tank is fixedly provided with a water tank with a drain valve, the upper end of the water tank is fixedly provided with a surrounding cylinder, the surrounding cylinder is hollow, an inner cavity of the surrounding cylinder penetrates through the upper end and the lower end of the surrounding cylinder, the upper end of the surrounding cylinder is fixedly provided with a top plate, the bottom surface of the water tank is fixedly provided with a rack, the rack and the side wall of the water tank are arranged at intervals, the rear part of the upper end and the front part of the upper end of the rack are respectively fixedly provided with a guide structure and a mounting rack, the guide structure is internally provided with a plastic bottle clamping structure in a sliding manner, the upper end of the mounting rack is fixedly provided with a position adjusting structure in a penetrating manner, the position adjusting structure is in transmission connection with the plastic bottle clamping structure, and the plastic bottle body is spliced at the upper end of the plastic bottle clamping structure; the upper end of the top plate is fixedly provided with a vacuum pressure gauge, a first electromagnetic valve and a second electromagnetic valve in a penetrating way, the outlet of the first electromagnetic valve is provided with an exhaust pipe, the outlet of the exhaust pipe is connected with the inlet of the air pump, and a supporting frame is jointly arranged between the position adjusting structure and the right inner wall of the enclosure. The left end, the rear end and the right end of the enclosure are provided with a first observation plate, the front end of the enclosure is provided with an operation port, the right end of the enclosure is movably provided with a sealing door through a hinge, and the sealing door is matched with the operation port and can seal the operation port; a second observation plate is embedded on the sealing door; the detection end of the vacuum pressure gauge extends into the inner cavity of the surrounding cylinder, and the inlet of the first electromagnetic valve and the outlet of the second electromagnetic valve are both communicated with the inner cavity of the surrounding cylinder.

Preferably, the guide structure comprises a bracket fixed at the rear side of the upper end of the rack, guide frames are fixedly installed on the left and right inner wall surfaces of the bracket, guide grooves are formed in the inner side surfaces of the two guide frames, each guide groove is formed by two horizontal grooves which are communicated with each other and are formed by inclined grooves between the two horizontal grooves, the inclined grooves are arranged in a rear low front high mode, anti-falling blocks are arranged in the horizontal grooves of the front side, the anti-falling blocks are fixed with the guide frames, and the front end surfaces of the anti-falling blocks are flush with the front end surfaces of the guide frames.

Preferably, the positioning structure comprises a first rotating shaft and a second rotating shaft which are distributed left and right, synchronous wheels are fixedly sleeved on the first rotating shaft and the second rotating shaft, a synchronous belt is connected between the two synchronous wheels in a common transmission mode, a gear is fixedly sleeved on the second rotating shaft, a rack is connected to the right side of the gear in a meshed mode, a transmission frame is fixedly arranged at the rear end of the rack, a sliding rod is inserted into the left side of the upper end of the transmission frame, the rack is inserted into the supporting frame in a sliding mode, and the first rotating shaft and the second rotating shaft are inserted into the upper end of the installation frame.

Preferably, the support frame is fixed on the right inner wall surface of the surrounding cylinder and is arranged front and back, a T-shaped chute is formed in the support frame, the chute penetrates through the front end and the rear end of the support frame, the narrow part of the chute penetrates through the left end surface of the support frame, the rack is arranged in the chute in a sliding manner, and the tooth part of the rack, the connecting part of the rack and the transmission frame are all arranged in the narrow part of the chute in a sliding manner; the front side of the synchronous belt is fixedly provided with a handle.

Preferably, the plastic bottle clamping structure comprises a supporting block, a slot is formed in the middle of the upper end of the supporting block, an adjusting groove is formed in the upper end of the supporting block, the adjusting groove is communicated with the slot and penetrates through the outer vertical surface of the supporting block, a pressing frame is arranged in the adjusting groove, a pressing rod is fixedly arranged at the upper end of the supporting block, a plurality of pressing rods are arranged at intervals around the slot, a transmission column is fixedly arranged at the upper part of the right end of the supporting block, and two rollers are movably mounted at the lower part of the left end and the lower part of the right end of the supporting block through shafts.

Preferably, the rollers at the left side and the right side are respectively movably arranged in the left guide groove and the right guide groove, and the transmission column is inserted into and movably connected with the upper part of the left end of the sliding rod; the adjusting grooves are arranged in a plurality and distributed in an annular array with the slots as the center, and each adjusting groove is internally provided with a pressing frame correspondingly; the bottom surface of the slot is provided with a plurality of through holes which penetrate through the lower end surface of the supporting block.

Preferably, the pressing frame comprises a sliding frame which is arranged in the adjusting groove in a sliding manner, a spring is fixedly arranged at one end of the sliding frame, which faces the slot, and a pressing block is fixedly arranged at one end of the spring, which is far away from the sliding frame; the inner side of the spring is provided with a guide rod, one end of the guide rod is fixed with the pressing block, and the other end of the guide rod is in penetrating and movable connection with the sliding frame.

Preferably, the pressing block is in contact with the plastic bottle body, an anti-slip strip is arranged on one surface of the pressing block, which is connected with the plastic bottle body, and the pressing rod is matched with the plastic bottle body.

Preferably, the upper end thread of the sliding frame is inserted and provided with a tightening knob, and the lower end of the tightening knob is in contact fit with the bottom surface of the adjusting groove.

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

1. the water tank is filled with water for indicating whether the plastic bottle body leaks air or not, the plastic bottle body is fixed through the plastic bottle clamping structure clamp, and when negative pressure detection is carried out, one end face of the bottle cap, which faces the bottle body, can be located above the supporting block, the liquid level of the water in the water tank slightly drops out of one end face of the bottle cap, which faces the bottle body, air in a cavity surrounded by the top plate, the surrounding cylinder, the water tank and the sealing door is pumped out through the air pump, the air pumping pipe and the first electromagnetic valve, so that a negative pressure environment is formed around the plastic bottle body, the air pressure in the plastic bottle body is larger than the air pressure of the surrounding environment of the plastic bottle body, an air pressure difference is formed, when the plastic bottle body leaks air, air leakage can generate bubbles in the water, so that a detector can judge that the tightness of the plastic bottle body does not meet the requirement through the air leakage, and can judge that the plastic bottle body is a defective product, and the sealing effect of the plastic bottle body can be judged through whether the air bubbles exist.

2. Through setting up guide structure, plastic bottle card solid structure and positioning structure, plastic bottle card solid structure clamping is fixed the plastic bottle body, plastic bottle card solid structure can slide back and forth along the guide way in the guide structure, and slide back and forth in-process is accompanied with the reciprocates, can upwards move when plastic bottle card solid structure slides along the guide way, plastic bottle card solid structure can down move when sliding along the guide way backward, realize that plastic bottle card solid structure upwards keeps away from water and submerges in the water backward, thereby make the bottle lid in the plastic bottle body leave the boiled water or submerge under the surface, and through positioning structure, make hold-in range horizontal movement through pulling handle, can realize that the front and back of plastic bottle card solid structure is removed, realize that the bottle lid in the plastic bottle body leaves the boiled water or submerges under the surface, realize the linkage effect, conveniently make the bottle lid in the plastic bottle body leaves the boiled water or submerges under the surface, make detection operation more convenient, and can reduce the contact of detection personnel and water, facilitate the use.

3. Through setting up the solid structure of plastic bottle card to install plastic bottle body and bottle lid, make the difference cut the plastic bottle body and can link together plastic bottle body and this detection device and carry out negative pressure detection, make detect qualified plastic bottle body that plastic bottle body and bottle lid junction sealed effect is qualified promptly after connecting can get back to the product line again and process into the product and sell, can significantly reduce the cost that causes because of detecting, the practicality is high, can promote economic benefits.

4. Through the tight knob on the balladeur train, the lower extreme of tight knob and the tank bottom face contact cooperation of adjustment tank, after tight knob and the tank bottom face contact of adjustment tank, can fix the balladeur train in the adjustment tank, and make tight knob and the different position contact of adjustment tank bottom face, can fix the balladeur train in the different positions of adjustment tank to adjust the diameter size of the cavity that a plurality of briquetting encloses, make a plurality of briquetting can be used for the bottle lid of the fixed different diameter sizes of centre gripping, improve suitability and practicality.

Drawings

FIG. 1 is a diagram showing the overall construction of a plastic bottle negative pressure detecting device according to the present invention;

FIG. 2 is a schematic diagram of the internal structure of the negative pressure detecting device for plastic bottles according to the present invention;

FIG. 3 is a schematic structural view of a guide structure and a positioning structure;

FIG. 4 is a schematic structural view of a support frame;

FIG. 5 is a schematic view of a plastic bottle clamping structure;

FIG. 6 is a schematic diagram of the structure of the support block;

FIG. 7 is a schematic view of the structure of the press frame;

fig. 8 is a schematic diagram showing connection between the plastic bottle negative pressure detecting device and the plastic bottle body.

In the figure: 1. a water tank; 2. a surrounding cylinder; 3. a top plate; 4. sealing the door; 5. a stand; 6. a guide structure; 7. a mounting frame; 8. a positioning structure; 9. a plastic bottle clamping structure; 10. a vacuum pressure gauge; 11. a first electromagnetic valve; 12. a second electromagnetic valve; 13. an exhaust pipe; 14. a support frame; 15. a plastic bottle body; 21. an operation port; 22. a first observation plate; 41. a second observation plate; 61. a bracket; 62. a guide frame; 63. a guide groove; 64. an anti-falling block; 81. a first rotating shaft; 82. a second rotating shaft; 83. a synchronizing wheel; 84. a synchronous belt; 85. a gear; 86. a rack; 87. a transmission frame; 88. a slide bar; 841. a handle; 91. a support block; 92. a slot; 93. an adjustment tank; 94. a pressing frame; 95. a compression bar; 96. a drive column; 97. a roller; 921. a through hole; 941. a carriage; 942. briquetting; 943. a guide rod; 944. a spring; 945. and (5) tightly fixing the knob.

Detailed Description

The invention is further described in connection with the following detailed description, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the invention easy to understand.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "provided," "connected," and the like are to be construed broadly, and may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1-8, the plastic bottle negative pressure detecting device is used for detecting the tightness of the plastic bottle body 15, the plastic bottle body 15 is composed of a bottle body and a bottle cap, and the bottle cap is arranged at an opening of the bottle body in a covering manner through threaded connection and seals the opening of the bottle body. The plastic bottle negative pressure detection device comprises a water tank 1 for containing water and an air extracting pump for extracting air to generate a negative pressure environment, wherein the upper end of the water tank 1 is opened, a drain valve is fixedly arranged at the lower end of the water tank 1 in a penetrating way, and water in the water tank 1 can be discharged downwards after the drain valve is opened; the upper end of the water tank 1 is fixedly provided with a surrounding cylinder 2, and in a specific embodiment, the surrounding cylinder 2 and the water tank 1 are integrally manufactured; the enclosing cylinder 2 is arranged in a hollow way, the inner cavity of the enclosing cylinder 2 penetrates through the upper end and the lower end of the enclosing cylinder 2, the upper end of the enclosing cylinder 2 is fixedly provided with a top plate 3, the bottom surface of the water tank 1 is fixedly provided with a bench 5, the bench 5 and the side wall of the water tank 1 are arranged at intervals, and after water is filled in the water tank 1, the water can spread to the upper part of the bench 5 through a gap between the bench 5 and the water tank 1; the rear part of the upper end and the front part of the upper end of the bench 5 are respectively fixedly provided with a guide structure 6 and a mounting frame 7, a plastic bottle clamping structure 9 is arranged in the guide structure 6 in a sliding manner, a position adjusting structure 8 is movably installed at the upper end of the mounting frame 7 in a penetrating and inserting manner, the position adjusting structure 8 is in transmission connection with the plastic bottle clamping structure 9, and a plastic bottle body 15 is spliced at the upper end of the plastic bottle clamping structure 9; when the negative pressure detection is carried out on the plastic bottle body 15, the environment around the plastic bottle body 15 is the negative pressure environment, the liquid level of the water in the water tank 1 slightly penetrates through one end face of the bottle body on the bottle cap, through the above, when the bottle cap is completely installed at the opening of the bottle body but the opening of the bottle body is not completely sealed, when the air in the bottle body is dispersed through the connecting gap between the bottle body and the bottle cap, the dispersed air can form bubbles in the water around the bottle cap, so that a detector can judge that the tightness of the plastic bottle body 15 does not meet the requirement through the dispersed bubbles, and the plastic bottle body 15 can be judged to be a defective product. The upper end of roof 3 wears fixed mounting to have vacuum pressure gauge 10, solenoid valve 11 and solenoid valve 12 No. two, the outlet of solenoid valve 11 is installed and is taken out tube 13, the export of tube 13 links to each other with the entry of aspiration pump, the detection end of vacuum pressure gauge 10 extends to enclose in the section of thick bamboo 2 inner chamber, the entry of solenoid valve 11 and the export of solenoid valve 12 No. two all are linked together with enclosing a section of thick bamboo 2 inner chamber, wherein, vacuum pressure gauge 10 is used for detecting the vacuum degree of the negative pressure environment around the plastic bottle body 15, so that the negative pressure size around the plastic bottle body 15 is controlled to the inspector, can take out the air in the cavity that is enclosed by roof 3, enclosing a section of thick bamboo 2, water tank 1 and sealing door 4 through aspiration pump, exhaust tube 13 and solenoid valve 11, thereby form the negative pressure environment around the plastic bottle body 15, through solenoid valve 12 No. two, after accomplishing the negative pressure detection of plastic bottle body 15, can make the cavity that is enclosed by roof 3, enclosing a section of thick bamboo 2, water tank 1 and sealing door 4 and external intercommunication, make the atmospheric pressure in this cavity resume, be convenient for opening the sealing door 4 and the atmospheric pressure that detects other negative pressures of plastic bottle 15. A supporting frame 14 is commonly arranged between the positioning structure 8 and the right inner wall of the surrounding cylinder 2. The left end, the rear end and the right end of the enclosing barrel 2 are provided with a first observation plate 22, the front end of the enclosing barrel 2 is provided with an operation opening 21, the right end of the enclosing barrel 2 is movably provided with a sealing door 4 through a hinge, and the sealing door 4 is matched with the operation opening 21 and can seal the operation opening 21; the sealing door 4 is embedded with a second observation plate 41, the first observation plate 22 and the second observation plate 41 are colorless transparent glass plates, so that a inspector can conveniently observe whether bubbles emerge or not directly, and the sealing door is convenient to use.

It should be noted that, when the inlet of the first electromagnetic valve 11 is flush with the lower end surface of the top plate 3 and when the air in the cavity surrounded by the top plate 3, the enclosure 2, the water tank 1 and the sealing door 4 is pumped through the air pump, the air pump 13 and the first electromagnetic valve 11, the air pump pumps air at a low speed, so as to avoid the change of the liquid level of the water in the water tank 1 when the air pump pumps air to form negative pressure, the liquid level of the water is kept in a calm state, so that when air bubbles emerge, the air bubbles can be observed rapidly and obviously, and when the negative pressure value in the cavity surrounded by the top plate 3, the enclosure 2, the water tank 1 and the sealing door 4 reaches a required value, the air pump and the first electromagnetic valve 11 are in a closed state so as to form a stable negative pressure environment around the plastic bottle body 15.

As a further explanation of the above technical solution, the guide structure 6 is configured to guide the movement of the plastic bottle fastening structure 9, so that the plastic bottle fastening structure 9 moves downward when moving backward, so that the plastic bottle fastening structure 9 moves upward when moving forward, specifically, the guide structure 6 includes a bracket 61 fixed at the rear side of the upper end of the stand 5, guide frames 62 are fixedly installed on the left and right inner wall surfaces of the bracket 61, guide grooves 63 are formed on the inner side surfaces of the two guide frames 62, the guide grooves 63 are formed by two horizontal grooves communicating with each other and inclined between the two horizontal grooves, the inclined grooves are arranged in a rear low and front high manner, the front and rear horizontal grooves are arranged up and down, an anti-falling block 64 is arranged in the horizontal groove on the front side, the anti-falling block 64 is fixed with the guide frames 62, and the front end surface of the anti-falling block 64 is flush with the front end surface of the guide frames 62.

As a further explanation of the above technical solution, the positioning structure 8 is used for driving the plastic bottle clamping structure 9 to move back and forth, specifically, the positioning structure 8 includes a first rotating shaft 81 and a second rotating shaft 82 which are distributed left and right, synchronous wheels 83 are fixedly sleeved on the first rotating shaft 81 and the second rotating shaft 82, synchronous belts 84 are jointly connected between the two synchronous wheels 83 in a transmission manner, gears 85 are fixedly sleeved on the second rotating shaft 82, the gears 85 are located above the synchronous wheels 83, racks 86 are connected to the right sides of the gears 85 in a meshed manner, a driving frame 87 is fixedly arranged at the rear ends of the racks 86, the driving frame 87 is Z-shaped, sliding rods 88 are movably installed on the left sides of the upper ends of the driving frame 87 in a penetrating manner, the sliding rods 88 can slide up and down relative to the driving frame 87, specifically, when the driving frame 87 moves forward, the sliding rods 88 move forward along with the driving frame 87 and move up relative to the driving frame 87, and when the driving frame 87 moves backward, the sliding rods 88 move backward along with the driving frame 87; the rack 86 is inserted and slidably mounted on the support frame 14, the first rotating shaft 81 and the second rotating shaft 82 are inserted and movably mounted at the upper end of the mounting frame 7, and the first rotating shaft 81 and the second rotating shaft 82 can rotate at the upper end of the mounting frame 7.

It should be noted that, the support frame 14 is fixed on the right inner wall surface of the enclosure 2 and is arranged front and back, a T-shaped chute is provided in the support frame 14, the chute penetrates through the front and back ends of the support frame 14, the narrow portion of the chute penetrates through the left end surface of the support frame 14, the rack 86 is slidably arranged in the chute, and the tooth portion of the rack 86, the connecting portion of the rack 86 and the transmission frame 87 are slidably arranged in the narrow portion of the chute, so that the rack 86 can slide front and back in the support frame 14 and drive the transmission frame 87 to slide front and back. The front side of the timing belt 84 is fixedly provided with a handle 841, the timing belt 84 can be moved left and right by pulling the handle 841, specifically, when the timing belt 84 is moved left by the handle 841, both the first rotating shaft 81 and the second rotating shaft 82 rotate clockwise, the gear 85 rotates clockwise, the rack 86 is driven to slide forward, the transmission frame 87 and the slide bar 88 are driven to slide forward, and when the timing belt 84 is moved right by the handle 841, the gear 85 rotates counterclockwise, the rack 86 is pushed to slide backward, and the transmission frame 87 and the slide bar 88 are driven to move backward.

The opening angle of the sealing door 4 is greater than 180 degrees, and the rack 86 can be moved into and out of the operation port 21 after the sealing door 4 is completely opened.

As a further explanation of the above technical solution, the plastic bottle fastening structure 9 includes a supporting block 91, the middle part of the upper end of the supporting block 91 is provided with a slot 92, the inner diameter of the slot 92 is larger than the outer diameter of the bottle cap, and the height of the slot 92 is smaller than the height of the bottle cap, so that after the bottle cap of the plastic bottle body 15 is inserted into the slot 92, an end face of the bottle cap facing the bottle body will be located above the supporting block 91, and thus air bubbles formed due to air leakage can be conveniently observed when the plastic bottle body 15 leaks. The upper end of the supporting block 91 is provided with an adjusting groove 93, the adjusting groove 93 is communicated with the slot 92 and penetrates through the outer vertical surface of the supporting block 91, the adjusting groove 93 is I-shaped, the adjusting groove 93 is provided with a pressing frame 94, the pressing frame 94 is in contact with the side surface of the bottle cap, the plastic bottle body 15 is clamped and fixed in the slot 92, the upper end of the supporting block 91 is fixedly provided with a pressing rod 95, the pressing rods 95 are arranged at intervals around the slot 92, the pressing rod 95 is matched with the plastic bottle body 15, the position of the plastic bottle body 15 is limited, the stability of the plastic bottle body 15 during front and back movement is guaranteed, the pressing rod 95 is an L-shaped rod, and the upper end face and the lower end face of the transverse portion of the pressing rod 95 are all arranged to be inclined planes, so that the plastic bottle body 15 can enter and exit a space surrounded by the pressing rods 95 in the longitudinal direction. The upper part of the right end of the supporting block 91 is fixedly provided with a transmission column 96, the lower part of the left end and the lower part of the right end of the supporting block 91 are respectively and movably provided with two rollers 97 through shafts, the shafts connecting the rollers 97 and the supporting block 91 are fixed with the supporting block 91, and the rollers 97 are movably sleeved on the shafts and can move relative to the shafts; in one embodiment, the roller 97 may be selected as a bearing.

It should be noted that, the rollers 97 on the left and right sides are movably mounted in the left and right guide grooves 63, respectively, the rollers 97 can roll in the guide grooves 63, so that the supporting block 91 can slide forward and backward along the guide frame 62, when the supporting block 91 slides forward along the guide frame 62, the supporting block firstly slides horizontally forward, then slides obliquely forward from low to high, finally slides horizontally forward until contacting with the anti-drop block 64, and when the supporting block 91 slides sequentially along the guide frame 62, the supporting block firstly slides horizontally backward, then slides obliquely backward from high to low, and finally slides horizontally until contacting with the rear end of the guide groove 63. The transmission column 96 is inserted and movably connected with the upper part of the left end of the slide bar 88, and when the transmission column 96 moves along with the supporting block 91, the slide bar 88 can be driven to move up and down, so that the plastic bottle clamping structure 9 and the positioning structure 8 can be matched with each other; the adjusting grooves 93 are provided with a plurality of annular arrays which are distributed by taking the slots 92 as the center, each adjusting groove 93 is internally provided with a pressing frame 94 correspondingly, the plastic bottle body 15 is clamped and fixed at the center position of the slot 92 through the pressing frames 94, and the clamping and fixing stability of the plastic bottle body 15 is ensured; the bottom surface of the slot 92 is provided with a plurality of through holes 921, and the through holes 921 penetrate through the lower end surface of the supporting block 91, so that water in the water tank 1 can enter the slot 92 through the through holes 921.

As a further explanation of the plastic bottle clamping structure 9, the pressing frame 94 includes a sliding frame 941 slidably disposed in the adjusting slot 93, a spring 944 is fixedly disposed at one end of the sliding frame 941 facing the slot 92, a pressing block 942 is fixedly disposed at one end of the spring 944 away from the sliding frame 941, and the spring 944 is used for applying a force to the pressing block 942 facing the plastic bottle body 15, so that the pressing block 942 clamps and fixes the plastic bottle body 15; the inner side of the spring 944 is provided with a guide rod 943, one end of the guide rod 943 is fixed with the pressing block 942, and the other end of the guide rod 943 is in penetrating and movable connection with the carriage 941. The briquetting 942 contacts with the plastic bottle body 15, specifically, the briquetting 942 contacts with the bottle lid in the plastic bottle body 15, and the one side that meets with the plastic bottle body 15 on the briquetting 942 is provided with the antislip strip, can guarantee the contact stability between plastic bottle body 15 and the briquetting 942, and in addition, the one side upside that meets with the plastic bottle body 15 on the briquetting 942 is outside slope setting to the convenience inserts the plastic bottle body 15 between a plurality of briquettes 942, improves the operating convenience.

The upper end screw thread of balladeur train 941 is threaded and is installed tightly to fix knob 945, tightly fix knob 945's lower extreme and the tank bottom contact cooperation of adjustment tank 93, after tightly fixing knob 945 and the tank bottom contact of adjustment tank 93, can fix balladeur train 941 in adjustment tank 93, and make tightly fix knob 945 and the different positions contact of adjustment tank 93 tank bottom surface, can fix the different positions in adjustment tank 93 with balladeur train 941, thereby adjust the diameter size of the cavity that a plurality of briquetting 942 encloses, make a plurality of briquetting 942 can be used for the fixed bottle lid of different diameter sizes of centre gripping, improve suitability and practicality.

In the negative pressure detection device for plastic bottles, when the negative pressure detection is carried out on the plastic bottle body 15, the plastic bottle body 15 is inserted into a space surrounded by a plurality of compression bars 95 from top to bottom, the bottle cap is inserted into a slot 92 and clamped and fixed by a plurality of pressing blocks 942, then a handle 841 is pushed rightwards, a rack 86, a transmission frame 87 and a slide bar 88 are pushed to slide backwards, a transmission column 96 and a supporting block 91 are slid backwards, a roller 97 rolls backwards and downwards along a guide groove 63, so that the supporting block 91 moves backwards and downwards, when the roller 97 moves to the rear end of the guide groove 63, the supporting block 91 and the bottle cap are immersed below the water surface, then the handle 841 is stopped to be operated, then an operation opening 21 is sealed by a sealing door 4, then a first electromagnetic valve 11 is opened, a suction pump is started, and air in a cavity surrounded by a top plate 3, a surrounding cylinder 2, a water tank 1 and the sealing door 4 is pumped out, forming a negative pressure environment around the plastic bottle body 15, detecting the vacuum degree of the negative pressure environment around the plastic bottle body 15, closing the air pump and the first electromagnetic valve 11 at the same time when the negative pressure value reaches a required value, when the bottle cap is completely installed at the opening of the bottle body but the opening of the bottle body is not completely sealed, diffusing air in the bottle body through a connecting gap between the bottle body and the bottle cap, forming bubbles in water around the bottle cap by the diffused air, judging that the tightness of the plastic bottle body 15 does not meet the requirement by a detecting personnel through the diffused bubbles, judging that the plastic bottle body 15 is a defective product, if no bubbles are diffused, the plastic bottle body 15 is qualified, completing the negative pressure detection of the plastic bottle, then opening the second electromagnetic valve 12, enabling a cavity enclosed by the top plate 3, the enclosing cylinder 2, the water tank 1 and the sealing door 4 to be communicated with the outside, enabling the air pressure in the cavity to be restored to the atmospheric pressure, the sealing door 4 is opened, then the left push-pull hand 841 moves the plastic bottle clamping structure 9 and the plastic bottle body 15 to the operation port 21, and then the plastic bottle body 15 is taken out.

The foregoing has shown and described the basic principles and main features of the present invention and the advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. The plastic bottle negative pressure detection device is used for detecting the tightness of a plastic bottle body (15) and comprises a water tank (1) for containing water and an air extracting pump for extracting air to generate a negative pressure environment, wherein the upper end of the water tank (1) is opened, and a drain valve is fixedly installed at the lower end of the water tank (1) in a penetrating manner; the method is characterized in that: the upper end of the water tank (1) is fixedly provided with a surrounding cylinder (2), the surrounding cylinder (2) is arranged in a hollow mode, an inner cavity of the surrounding cylinder (2) penetrates through the upper end and the lower end of the surrounding cylinder (2), the upper end of the surrounding cylinder (2) is fixedly provided with a top plate (3), the bottom surface of the water tank (1) is fixedly provided with a rack (5), the rack (5) and the side wall of the water tank (1) are arranged at intervals, the rear part of the upper end and the front part of the upper end of the rack (5) are respectively fixedly provided with a guide structure (6) and a mounting frame (7), a plastic bottle clamping structure (9) is arranged in sliding mode in the guide structure (6), the upper end of the mounting frame (7) is provided with a position adjusting structure (8) in a penetrating and movable mode, the position adjusting structure (8) is in transmission connection with the plastic bottle clamping structure (9), and the plastic bottle body (15) is spliced at the upper end of the plastic bottle clamping structure (9); the vacuum pressure gauge is characterized in that a vacuum pressure gauge (10), a first electromagnetic valve (11) and a second electromagnetic valve (12) are fixedly installed at the upper end of the top plate (3), an exhaust pipe (13) is installed at the outlet of the first electromagnetic valve (11), the outlet of the exhaust pipe (13) is connected with the inlet of the air pump, and a supporting frame (14) is jointly installed between the positioning structure (8) and the right inner wall of the enclosing cylinder (2).

2. The plastic bottle negative pressure detection device according to claim 1, wherein: the left end, the rear end and the right end of the surrounding tube (2) are provided with a first observation plate (22), the front end of the surrounding tube (2) is provided with an operation port (21), the right end of the surrounding tube (2) is movably provided with a sealing door (4) through a hinge, and the sealing door (4) is matched with the operation port (21) and can seal the operation port (21); a second observation plate (41) is embedded on the sealing door (4); the detection end of the vacuum pressure gauge (10) extends into the inner cavity of the surrounding cylinder (2), and the inlet of the first electromagnetic valve (11) and the outlet of the second electromagnetic valve (12) are both communicated with the inner cavity of the surrounding cylinder (2).

3. The plastic bottle negative pressure detection device according to claim 1, wherein: guide structure (6) are including fixing support (61) in rack (5) upper end rear side, all fixed mounting has leading truck (62) on the left and right internal face of support (61), two guide slot (63) have all been seted up on the medial surface of leading truck (62), guide slot (63) are by the slope groove component of two horizontal grooves intercommunication between two horizontal grooves, and the slope groove is low front height setting in the back, is provided with anticreep piece (64) in the horizontal groove of front side, anticreep piece (64) are fixed mutually with leading truck (62), and the preceding terminal surface of anticreep piece (64) flushes with the preceding terminal surface of leading truck (62).

4. A plastic bottle negative pressure detection device according to claim 3, wherein: the utility model provides a novel automatic adjusting device for the position of the motor vehicle is characterized in that the position adjusting structure (8) comprises a rotating shaft (81) and a rotating shaft (82) which are distributed left and right, synchronous wheels (83) are fixedly sleeved on the rotating shaft (81) and the rotating shaft (82), synchronous belts (84) are connected between the synchronous wheels (83) in a common transmission mode, gears (85) are fixedly sleeved on the rotating shaft (82), racks (86) are connected to the right sides of the gears (85) in a meshed mode, a transmission frame (87) is fixedly arranged at the rear ends of the racks (86), sliding rods (88) are fixedly arranged at the left sides of the upper ends of the transmission frame (87), the racks (86) are fixedly sleeved on the support frame (14) in a front-rear penetrating sliding mode, and the rotating shaft (81) and the rotating shaft (82) are fixedly sleeved on the upper ends of the installation frame (7).

5. The plastic bottle negative pressure detection device according to claim 4, wherein: the support frame (14) is fixed on the right inner wall surface of the surrounding cylinder (2) and is arranged front and back, a T-shaped chute is formed in the support frame (14), the chute penetrates through the front end and the rear end of the support frame (14), the narrow part of the chute penetrates through the left end surface of the support frame (14), the rack (86) is arranged in the chute in a sliding manner, and the tooth part of the rack (86) and the connecting part of the rack (86) and the transmission frame (87) are all arranged in the narrow part of the chute in a sliding manner; a handle (841) is fixedly arranged on the front side of the synchronous belt (84).

6. The plastic bottle negative pressure detection device according to claim 5, wherein: the utility model provides a plastic bottle card constructs (9) including riding block (91), slot (92) have been seted up at the upper end middle part of riding block (91), adjustment tank (93) have been seted up to the upper end of riding block (91), adjustment tank (93) and slot (92) intercommunication and run through the outer facade of riding block (91), adjustment tank (93) are provided with pressure frame (94), the fixed depression bar (95) that is provided with in upper end of riding block (91), depression bar (95) are provided with a plurality of and interval setting around slot (92), the fixed transmission post (96) that are provided with in right-hand member upper portion of riding block (91), the left end lower part and the right-hand member lower part of riding block (91) are all through axle movable mounting two gyro wheels (97).

7. The plastic bottle negative pressure detection device according to claim 6, wherein: the rollers (97) on the left side and the right side are respectively movably arranged in the left guide groove (63) and the right guide groove, and the transmission column (96) is inserted into the upper part of the left end of the sliding rod (88) for movable connection; the adjusting grooves (93) are arranged in a plurality and distributed in an annular array with the slots (92) as the center, and a pressing frame (94) is correspondingly arranged in each adjusting groove (93); the bottom surface of the slot (92) is provided with a plurality of through holes (921), and the through holes (921) penetrate through the lower end surface of the supporting block (91).

8. The plastic bottle negative pressure detection device according to claim 7, wherein: the pressing frame (94) comprises a sliding frame (941) which is arranged in the adjusting groove (93) in a sliding manner, a spring (944) is fixedly arranged at one end, facing the slot (92), of the sliding frame (941), and a pressing block (942) is fixedly arranged at one end, far away from the sliding frame (941), of the spring (944); the inner side of the spring (944) is provided with a guide rod (943), one end of the guide rod (943) is fixed with the pressing block (942), and the other end of the guide rod (943) is in penetrating and movable connection with the sliding frame (941).

9. The plastic bottle negative pressure detection device according to claim 8, wherein: the pressing block (942) is in contact with the plastic bottle body (15), an anti-slip strip is arranged on one surface of the pressing block (942) connected with the plastic bottle body (15), and the pressing rod (95) is matched with the plastic bottle body (15).

10. The plastic bottle negative pressure detection device according to claim 8, wherein: the upper end of the sliding frame (941) is threaded and inserted with a tightening knob (945), and the lower end of the tightening knob (945) is in contact fit with the bottom surface of the adjusting groove (93).