CN113916472A - Oil tightness detection device for hydraulic pump production - Google Patents
Oil tightness detection device for hydraulic pump production Download PDFInfo
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- CN113916472A CN113916472A CN202111179846.2A CN202111179846A CN113916472A CN 113916472 A CN113916472 A CN 113916472A CN 202111179846 A CN202111179846 A CN 202111179846A CN 113916472 A CN113916472 A CN 113916472A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/36—Investigating fluid-tightness of structures by using fluid or vacuum by detecting change in dimensions of the structure being tested
- G01M3/363—Investigating fluid-tightness of structures by using fluid or vacuum by detecting change in dimensions of the structure being tested the structure being removably mounted in a test cell
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Abstract
The invention discloses an oil tightness detection device for hydraulic pump production, which comprises a base which is butted at a corresponding detection position, a connecting shaft penetrates through the upper end of the base, and a support piece is butted through the connecting shaft to form a detection mechanism, wherein the oil tightness detection device comprises: the movable screw rod is in nested butt joint with the outer side of the supporting piece, the upper ends of the supporting piece and the movable screw rod are in butt joint with the nested plate to form a movable structure, the lower end of the left side of the nested plate is fixedly connected with the abutting piece, and the oil tightness detection device for the hydraulic pump production is characterized in that under the action of axial pressure, the sealing piece on the inner side of the fixed disc deforms in a gap limited by an object to be detected, so that the inner sides of the objects with different pipe diameters are attached and sealed, the fixed disc which moves downwards continuously is matched to observe the negative pressure state of the negative pressure floating piece in the nested butt joint of the inner ends of the fixed disc, the overall sealing performance of a single object is known, and the leakage problem of the rubber cylinder in the actual use process is reduced.
Description
Technical Field
The invention relates to the technical field of hydraulic pump production, in particular to an oil tightness detection device for hydraulic pump production.
Background
The hydraulic pump is comparatively common negative pressure equipment, and its main part comprises hydraulic pressure sealing pipe fitting etc. and the most important step of hydraulic pressure sealing pipe fitting production process is exactly to its sealing performance detect handle, but current hydraulic pump production still has certain defect with oily nature testing arrangement, just for example:
for example, a rubber seal ring sealing detection device with publication number CN213274717U can realize the full range of sealing detection work for objects, but this type of oil tightness testing device has a large volume, adopts a large amount of liquid immersion type detection processing mode, has low efficiency, consumes a long detection time, and cannot realize the comparative type synchronous detection processing for multiple groups of objects;
the existing oil tightness testing device for hydraulic pump production is inconvenient for multi-angle movable detection processing of the object, a possible detection result of the object with a single angle and a detection result of the object with different state angles have certain errors, and the precision cannot be guaranteed.
In order to solve the above problems, innovative design based on the structure of the original oil tightness testing device is urgently needed.
Disclosure of Invention
The invention aims to provide an oil tightness detection device for hydraulic pump production, which solves the problems that the oil tightness detection device provided by the background technology has large volume, adopts a large amount of liquid immersion type detection processing mode, has low efficiency, consumes long detection time, cannot realize contrast type synchronous detection processing on a plurality of groups of objects in a targeted manner, is inconvenient to carry out multi-angle activity detection processing on the objects, and has certain errors between the detection result of an object with a single angle and the detection result of an object with different state angles, and the precision cannot be ensured.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a hydraulic pump production is with oily nature detection device, the base butt joint corresponds the detection position, and the upper end of base runs through there is the connecting axle, has support piece formation detection mechanism through it butt joint, includes:
the movable screw rod is nested and butted at the outer side of the supporting piece, the upper ends of the supporting piece and the movable screw rod are butted with a nesting plate to form a movable structure, and the lower end of the left side of the nesting plate is fixedly connected with a contact piece;
the butt joint piece is nested and butted at the inner end of the support piece and corresponds to the position of the butt joint piece, the inner side of the left end of the support piece is connected with a first air bag in an adhering mode, and meanwhile, the outer end of the first air bag is provided with an air conveying hose in a penetrating mode;
the first traction rope is butted at the upper end of the butting piece, the tail end of the first traction rope is mutually connected with the inner end of the supporting piece, a bearing at the inner side of the lower end of the supporting piece is connected with a first gear, the outer side of the first gear is meshed with a transmission gear ring, and a limiting piece is connected between the inner side of the lower end of the supporting piece and the transmission gear ring through a bearing;
the bolt of the fixed disk is fixed at the lower end of the embedded plate, the inner side of the fixed disk is provided with the negative pressure floating piece in a penetrating way, and the inner end of the fixed disk is provided with the second air bag in an embedded way and is communicated with the first air bag through the air conveying hose;
the bonding air bag is bonded and connected to the inner side of the fixed disc and is in contact with the end part of the negative pressure floating piece, the corrugated pipe is bonded and connected to the outer side of the fixed disc, the lower end of the corrugated pipe is fixedly connected with the indicating block, the corrugated pipe and the bonding air bag are communicated with each other, and the scale block is arranged on the outer side of the fixed disc;
and the second traction rope is butted at the end of the connecting shaft and is butted with the first traction rope to form a transmission structure.
Preferably, the nesting plate forms a sliding structure along the upper end of the support member through the movable screw rod, and the nesting plate synchronously drives the fixing plate at the lower end to form a telescopic structure along the inner end of the object to be detected, so that the fixing plate can be stably driven to move downwards in position in the process of downward movement of the nesting plate under stress.
Preferably, the first gear and the butt joint piece form a transmission structure through a first traction rope, the butt joint piece moves downwards synchronously when contacting with the abutting piece, the butt joint piece synchronously forms an extrusion structure for the first air bag, and the first gear is driven to rotate under stress through the first traction rope synchronously in the downward movement process of the butt joint piece.
Preferably, the limiting part is provided with a second gear and a torsion spring, the shaft end key of the limiting part is connected with the second gear, the second gear is meshed with the inner end of the transmission gear ring, and the torsion spring is embedded in the inner end of the second gear.
Preferably, the limiting part forms an engaging structure with the transmission gear ring through the second gear, the second gear is in a state of rotation and revolution relative to the transmission gear ring, and the second gear forms a quick reset structure along the inner side of the lower end of the supporting part through a torsion spring, so that in the process of rotation under stress of the transmission gear ring, the second gear meshed with the inner side can be stably driven to synchronously rotate with the limiting part, and the self-limiting working effect is realized.
Preferably, the fixed disc is provided with a sealing element and a return spring, the inner end of the fixed disc is nested with the sealing element and forms a nested structure along the inner part of the fixed disc, and the outer side of the fixed disc is fixedly connected with the return spring.
Preferably, the sealing member is the silica gel material, and forms the extrusion state of outwards moving when the sealing member contacts the second gasbag of inflation, realizes the detection demand to different pipe diameter articles.
Preferably, the negative pressure floats along according to the buoyancy of contact liquid the inboard displacement of fixed disk, and the negative pressure floats the extruded bonding gasbag of piece and carries out the air feed processing along bellows inside, and then promotes the instruction piece and correspond the activity along the instruction piece outside, floats the difference of piece contact negative pressure according to the negative pressure, and it will promote the position activity of the synchronous self-adaptation of instruction piece thereupon to audio-visually let the user know sealing performance.
Preferably, the base synchronously drives the supporting piece to rotate at an angle along with the downward movement of the butt joint piece through the second traction rope, so that the rotary sealing detection processing is performed on the device.
Compared with the prior art, the invention has the beneficial effects that: the oil tightness detection device for the production of the hydraulic pump;
1. the movable sealing element is arranged, under the action of axial pressure, the sealing element on the inner side of the fixed disc deforms in a gap defined by an object to be detected, so that the inner sides of the objects with different pipe diameters are attached and sealed, the negative pressure state of the negative pressure floating element with the inner end nested and butted is observed by matching with the fixed disc which moves downwards continuously, the overall sealing performance of a single object is known, only the object meeting the sealing requirement can be regarded as a qualified product, the leakage problem of the rubber cylinder in the actual use process is reduced, the detection processing mode of large amount of liquid immersion type low efficiency is avoided, and meanwhile, the comparative synchronous detection processing of multiple groups of objects is realized in a targeted manner;
2. the support piece is provided with a movable structure, and the second traction rope synchronously driven in the process of the movement of the first traction rope drives the connecting shaft to bear force, so that the support piece stably forms a turnover working state along the upper end of the base, and multi-angle movement detection processing is carried out, and the defect that a possible detection result of an object with a single angle and an object detection result with different state angles have certain errors is avoided;
3. the locating parts are symmetrically distributed, in the process that the nested plate is stressed to move downwards, the butt joint part of the negative pressure drives the first gear of the traction rope to be stressed and transmitted, and the butt joint part of the negative pressure is matched with the rotation revolution structure which is meshed with each other, so that the working effect of quickly locating the outer side of the object to be detected is realized by inwards moving the 3 groups of the locating parts which are in contact with each other, the phenomena of position shaking and the like in the state of the negative pressure are avoided, and the detection stability of the device is ensured.
Drawings
FIG. 1 is a schematic front view of the present invention;
FIG. 2 is a schematic cross-sectional structural view of the support of the present invention;
FIG. 3 is an enlarged view of the structure at A in FIG. 1 according to the present invention;
FIG. 4 is a top cross-sectional view of the ring gear of the present invention;
FIG. 5 is a front cross-sectional structural view of the negative pressure float of the present invention;
FIG. 6 is a schematic top view of a second bladder of the present invention;
fig. 7 is a front sectional structural view of the bellows of the present invention.
In the figure: 1. a support member; 2. embedding a sleeve plate; 3. a movable screw rod; 4. a contact member; 5. a docking member; 6. a first air bag; 7. a first pull cord; 8. a first gear; 9. a transmission gear ring; 10. a limiting member; 1001. a second gear; 1002. a torsion spring; 11. a gas hose; 12. fixing the disc; 1201. a seal member; 1201. a return spring; 13. a second air bag; 14. a negative pressure float; 15. bonding the air bag; 16. a bellows; 17. an indication block; 18. a scale block; 19. a base; 20. a connecting shaft; 21. a second pull cord.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-7, the present invention provides a technical solution: the oil tightness detection device for the production of the hydraulic pump comprises a support member 1, a nested plate 2, a movable screw rod 3, a butting member 4, a butting member 5, a first air bag 6, a first traction rope 7, a first gear 8, a transmission gear ring 9, a limiting member 10, a second gear 1001, a torsion spring 1002, an air conveying hose 11, a fixed disc 12, a sealing member 1201, a return spring 1202, a second air bag 13, a negative pressure floating member 14, a bonding air bag 15, a corrugated pipe 16, an indication block 17, a scale block 18, a base 19, a connecting shaft 20 and a second traction rope 21.
the movable screw rod 3 is nested and butted on the outer side of the support part 1, the upper ends of the support part 1 and the movable screw rod 3 are butted with a nested plate 2 to form a movable structure, and the lower end of the left side of the nested plate 2 is fixedly connected with a contact part 4;
the butting piece 5 is nested and butted at the inner end of the supporting piece 1 and corresponds to the position of the butting piece 4, the inner side of the left end of the supporting piece 1 is connected with the first air bag 6 in an adhering mode, and meanwhile, the outer end of the first air bag 6 penetrates through and is provided with an air conveying hose 11;
the first traction rope 7 is butted at the upper end of the butting piece 5, the tail end of the first traction rope is mutually connected with the inner end of the supporting piece 1, the inner side of the lower end of the supporting piece 1 is in bearing connection with a first gear 8, the outer side of the first gear 8 is in meshing connection with a transmission gear ring 9, and a limiting piece 10 is in bearing connection between the inner side of the lower end of the supporting piece 1 and the transmission gear ring 9;
the fixed disc 12 is fixed at the lower end of the embedded plate 2 through bolts, a negative pressure floating piece 14 penetrates through the inner side of the fixed disc 12, a second air bag 13 is embedded at the inner end of the fixed disc 12 and communicated with the first air bag 6 through an air hose 11;
the bonding air bag 15 is bonded and connected to the inner side of the fixed disc 12 and is contacted with the end part of the negative pressure floating piece 14, the corrugated tube 16 is bonded and connected to the outer side of the fixed disc 12, the lower end of the corrugated tube 16 is fixedly connected with the indicating block 17, the corrugated tube 16 is communicated with the bonding air bag 15, and the scale block 18 is arranged on the outer side of the fixed disc 12;
and the second traction rope 21 is butted at the end of the connecting shaft 20 and is butted with the first traction rope 7 to form a transmission structure.
The nested plate 2 forms a sliding structure along the upper end of the support member 1 through the movable screw rod 3, and the nested plate 2 synchronously drives the fixed disc 12 at the lower end to form a telescopic structure along the inner end of the object to be detected. The first gear 8 and the abutting piece 5 form a transmission structure through the first traction rope 7, the abutting piece 5 moves downwards synchronously when contacting the abutting piece 4, and the abutting piece 5 forms an extrusion structure for the first air bag 6 synchronously. The limiting piece 10 is provided with a second gear 1001 and a torsion spring 1002, the second gear 1001 is connected to the shaft end key of the limiting piece 10, the second gear 1001 is meshed with the inner end of the transmission gear ring 9, and the torsion spring 1002 is mounted at the inner end of the second gear 1001 in a nested mode. The limiting member 10 forms a meshing structure with the transmission gear ring 9 through the second gear 1001, the second gear 1001 is in a state of rotating and revolving relative to the transmission gear ring 9, and the second gear 1001 forms a quick return structure along the inner side of the lower end of the supporting member 1 through the torsion spring 1002
The first traction rope 7 butted in the process that the butting part 5 moves downwards is stressed to drive the first gear 8 to rotate angularly, so that the transmission gear ring 9 meshed with the outer side of the first traction rope synchronously revolves, meanwhile, 3 groups of limiting parts 10 and the second gear 1001 meshed with the inner side of the transmission gear ring 9 roll the torsion spring 1002 to rotate angularly, and the rotation revolution structures meshed with each other are matched, so that the 3 groups of limiting parts 10 in contact move inwards to realize the working effect of quick positioning on the outer side of the object to be detected, and the phenomena of position shaking and the like in the negative pressure state are avoided.
The fixing plate 12 is provided with a sealing member 1201 and a return spring 1202, the sealing member 1201 is nested and mounted at the inner end of the fixing plate 12, a nested structure is formed along the inside of the fixing plate 12, and the return spring 1202 is fixedly connected to the outer side of the fixing plate 12.
The sealing element 1201 is made of silica gel, and an outward-moving extrusion state is formed when the sealing element 1201 contacts the expanded second air bag 13, so that the detection requirements on objects with different pipe diameters are met.
The handheld movable screw rod 3 rotates to drive the embedded plate 2 and the negative pressure floating piece 14 to move downwards, the abutting piece 4 on the outer side of the embedded plate 2 is contacted with the abutting piece 5 to push the abutting piece to move downwards, the first air bag 6 is extruded to enable the first air bag to supply air to the inside of the second air bag 13 through the air conveying hose 11, under the action of axial pressure, the sealing piece 1201 on the inner side of the fixed disc 12 deforms in a gap limited by an object to be detected through extrusion of the second air bag 13, the inner sides of the objects with different pipe diameters are attached and sealed, the negative pressure floating piece 14 with the inner ends in nested and abutting joint is observed by matching with the fixed disc 12 which moves downwards continuously, the overall sealing performance of a single object is known, and only the object which meets the sealing requirement can be regarded as a qualified product.
The negative pressure floating piece 14 moves along the inner side of the fixed disc 12 according to the buoyancy of the contact liquid, and the bonding air bag 15 extruded by the negative pressure floating piece 14 performs air supply treatment along the inside of the corrugated pipe 16, so as to push the indicating block 17 to move correspondingly along the outer side of the indicating block 17. The base 19 synchronously drives the supporting member 1 to rotate angularly along with the downward movement of the docking member 5 through the second traction rope 21, so as to perform a rotary sealing detection process on the device.
In the process of forced movement of the first traction rope 7, the second traction rope 21 butted with the first traction rope is pulled therewith to drive the butted connecting shaft 20 to roll up and correspondingly reserve the torsion spring 1002 to bear force, so that the support member 1 stably drives the positioned object to form a turnover working state along the upper end of the base 19, multi-angle movement detection processing is carried out, and the defect that a possible detection result of the object with a single angle and an object detection result with different state angles have certain errors is avoided.
The working principle is as follows: when the oil tightness detection device for the production of the hydraulic pump is used, according to the figures 1-7, the device is firstly placed at a position needing to work, objects to be detected are sequentially placed at the inner end of the supporting piece 1, after the position is determined, the movable screw rod 3 can be held by hands to rotate to drive the embedded plate 2 and the negative pressure floating piece 14 to move downwards, under the action of axial pressure, the sealing piece 1201 on the inner side of the fixed disc 12 deforms in a gap defined by the objects to be detected through the extrusion of the second air bag 13, the attaching and sealing treatment on the inner sides of the objects with different pipe diameters is realized, so that the negative pressure state of the negative pressure floating piece 14 with the nested and butted inner ends is observed by matching with the fixed disc 12 which moves downwards continuously, the integral sealing performance of a single object is known, and only the object which meets the sealing requirement can be regarded as a qualified product; in the process of the forced movement of the first traction rope 7, the connecting shaft 20 which drives the butt joint is rolled to correspond to the reserved torsion spring 1002 to bear force, so that the support piece 1 stably drives the positioned object to form a turnover working state along the upper end of the base 19, the defect that a certain error exists between a possible detection result of the object with a single angle and a detection result of the object with different state angles is avoided, and the overall practicability is improved.
Those not described in detail in this specification are within the skill of the art.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that 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 (9)
1. The utility model provides a hydraulic pump production is with oily nature detection device, base (19) dock in corresponding the detection position, and the upper end of base (19) runs through there is connecting axle (20), has support piece (1) to form detection mechanism through its butt joint, its characterized in that includes:
the movable screw rod (3) is in nested butt joint with the outer side of the supporting piece (1), the upper ends of the supporting piece (1) and the movable screw rod (3) are in butt joint with the nested plate (2) to form a movable structure, and the lower end of the left side of the nested plate (2) is fixedly connected with the abutting piece (4);
the butt joint piece (5) is nested and butted at the inner end of the support piece (1) and corresponds to the position of the butt joint piece (4), the inner side of the left end of the support piece (1) is connected with a first air bag (6) in an adhering mode, and meanwhile, the outer end of the first air bag (6) penetrates through a gas transmission hose (11);
the first traction rope (7) is butted at the upper end of the butting piece (5), the tail end of the first traction rope is connected with the inner end of the supporting piece (1), a first gear (8) is connected to the inner side of the lower end of the supporting piece (1) in a bearing mode, the outer side of the first gear (8) is connected with a transmission gear ring (9) in a meshed mode, and a limiting piece (10) is connected between the inner side of the lower end of the supporting piece (1) and the transmission gear ring (9) in a bearing mode;
the fixed disc (12) is fixed at the lower end of the embedded plate (2) through bolts, a negative pressure floating piece (14) penetrates through the inner side of the fixed disc (12), a second air bag (13) is embedded at the inner end of the fixed disc (12), and the fixed disc is communicated with the first air bag (6) through an air hose (11);
the bonding air bag (15) is bonded and connected to the inner side of the fixed disc (12) and is in contact with the end part of the negative pressure floating piece (14), the corrugated tube (16) is bonded and connected to the outer side of the fixed disc (12), the lower end of the corrugated tube (16) is fixedly connected with the indicating block (17), the corrugated tube (16) and the bonding air bag (15) are communicated with each other, and the scale block (18) is arranged on the outer side of the fixed disc (12);
and the second traction rope (21) is butted at the end of the connecting shaft (20) and is butted with the first traction rope (7) to form a transmission structure.
2. The oil-tightness detecting device for hydraulic pump production according to claim 1, characterized in that: the nested plate (2) forms a sliding structure along the upper end of the support piece (1) through the movable screw rod (3), and the nested plate (2) synchronously drives the fixed plate (12) at the lower end to form a telescopic structure along the inner end of the object to be detected.
3. The oil-tightness detecting device for hydraulic pump production according to claim 1, characterized in that: the first gear (8) and the butt joint piece (5) form a transmission structure through a first traction rope (7), the butt joint piece (5) moves downwards synchronously when contacting the contact piece (4), and the butt joint piece (5) forms an extrusion structure synchronously for the first air bag (6).
4. The oil-tightness detecting device for hydraulic pump production according to claim 1, characterized in that: the limiting piece (10) is provided with a second gear (1001) and a torsion spring (1002), the shaft end key of the limiting piece (10) is connected with the second gear (1001), the second gear (1001) is meshed with the inner end of the transmission gear ring (9), and the torsion spring (1002) is installed on the inner end of the second gear (1001) in a nested mode.
5. The oil-tightness detecting device for hydraulic pump production according to claim 4, characterized in that: the limiting piece (10) and the transmission gear ring (9) form a meshing structure through the second gear (1001), the second gear (1001) and the transmission gear ring (9) are in a rotation and revolution state, and the second gear (1001) forms a quick return structure through the torsion spring (1002) along the inner side of the lower end of the support piece (1).
6. The oil-tightness detecting device for hydraulic pump production according to claim 1, characterized in that: the fixed disc (12) is provided with a sealing element (1201) and a return spring (1202), the sealing element (1201) is mounted at the inner end of the fixed disc (12) in a nested mode, a nested structure is formed along the inner end of the fixed disc (12), and the return spring (1202) is fixedly connected to the outer side of the fixed disc (12).
7. The oil-tightness detecting device for hydraulic pump production according to claim 6, characterized in that: the sealing element (1201) is made of silica gel, and an outward-moving extrusion state is formed when the sealing element (1201) contacts the expanded second air bag (13), so that the detection requirements on objects with different pipe diameters are met.
8. The oil-tightness detecting device for hydraulic pump production according to claim 1, characterized in that: the negative pressure floating piece (14) moves along the inner side of the fixed disc (12) according to the buoyancy of the contact liquid, the bonding air bag (15) extruded by the negative pressure floating piece (14) supplies air along the inside of the corrugated pipe (16), and then the indication block (17) is pushed to move correspondingly along the outer side of the indication block (17).
9. The oil-tightness detecting device for hydraulic pump production according to claim 1, characterized in that: the base (19) synchronously drives the supporting piece (1) to rotate at an angle along with the downward movement of the butt joint piece (5) through a second traction rope (21), so that the rotary sealing detection processing is performed on the device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111179846.2A CN113916472A (en) | 2021-10-11 | 2021-10-11 | Oil tightness detection device for hydraulic pump production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111179846.2A CN113916472A (en) | 2021-10-11 | 2021-10-11 | Oil tightness detection device for hydraulic pump production |
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| Publication Number | Publication Date |
|---|---|
| CN113916472A true CN113916472A (en) | 2022-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111179846.2A Withdrawn CN113916472A (en) | 2021-10-11 | 2021-10-11 | Oil tightness detection device for hydraulic pump production |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117309498A (en) * | 2023-11-30 | 2023-12-29 | 天津石油职业技术学院 | Petroleum detection device with multi-range sealing sampling |
-
2021
- 2021-10-11 CN CN202111179846.2A patent/CN113916472A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117309498A (en) * | 2023-11-30 | 2023-12-29 | 天津石油职业技术学院 | Petroleum detection device with multi-range sealing sampling |
| CN117309498B (en) * | 2023-11-30 | 2024-02-02 | 天津石油职业技术学院 | Petroleum detection device with multi-range sealing sampling |
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Application publication date: 20220111 |