CN212776371U - Automatic lifting device for instrument - Google Patents

Abstract

The utility model provides an automatic lifting device of instrument, including a support section of thick bamboo, slider, buffering spring, connecting spring board and with the support section of thick bamboo is connected and is used for providing compressed air's compressed air distributing device, the slider includes the slide bar, the slide bar with a support section of thick bamboo sliding connection, the lower extreme of slide bar is connected with the instrument, the upper end of slide bar with the lower extreme of buffering spring is connected, the upper end of buffering spring with connecting spring board is connected, compressed air distributing device provides compressed air and gets into in the support section of thick bamboo, promotes the slide bar and drives the instrument removes; the buffer spring is deformed, the compressed air distribution device does not provide compressed air, and the buffer spring is restored to the original state under the action of elasticity to push the sliding rod and drive the instrument to move in the opposite direction. The utility model provides an automatic lifting device of instrument makes instrument round trip movement's in-process only need once air feed through the deformation that buffering spring produced, effectively reduces the compressed gas consumption.

Description

Automatic lifting device for instrument

Technical Field

The utility model relates to a check out test set technical field, in particular to instrument automatic lifting device.

Background

The instrument is a general name of instruments for displaying numerical values, and takes a chemical instrument as an example, the instrument is a common device in chemical production and comprises a detection instrument, a control instrument, a display instrument, an actuator, an automatic control system and the like.

In some automatic liquid filling equipment, often can set up the PH value tester and carry out the PH value test to the liquid of pouring into in the container to whether its PH value is in qualified scope, owing to need examine entirely, adopt artifical the detection, must increase the personnel selection cost, consequently can add at PH value test section position and establish automatic lifting device for the probe that drives the PH value tester is inserted or is gone up and take off the container bottleneck.

The existing automatic lifting device for the instrument comprises a supporting cylinder, a pushing plug arranged in the supporting cylinder and a push rod connected with the pushing plug, wherein a PH value tester is installed at one end of the push rod, the pushing plug is controlled by compressed air to move up and down, and the push rod is driven to realize the downward insertion or upward removal of a probe of the PH value tester. In driving the pH meter in this manner, the upward and downward movements required two compressed gas feeds, so that the compressed gas consumption was large.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an instrument automatic lifting device for solve among the prior art PH value tester reciprocate all need supply compressed gas so that the big problem of compressed gas consumption.

In order to achieve the above object, the present invention provides an automatic lifting device for an instrument, the automatic lifting device for an instrument comprises a supporting cylinder having an accommodating space, a sliding member, a buffering spring, a spring plate, and a compressed air distribution device connected to the supporting cylinder and used for providing compressed air, the sliding member, the buffering spring, and the spring plate are all disposed in the supporting cylinder, the sliding member comprises a sliding rod slidably connected to the supporting cylinder, the lower end of the sliding rod is connected to the instrument, the upper end of the sliding rod is connected to the lower end of the buffering spring, the upper end of the buffering spring is connected to the spring plate,

the compressed air distribution device provides compressed air to enter the supporting cylinder, pushes the sliding rod and drives the instrument to move; when compressed air is not provided, the buffer spring is restored to the original state under the action of elasticity, and pushes the sliding rod and drives the instrument to move in the opposite direction.

Further, the slider is still including locating the step post in the support section of thick bamboo, the step post includes big diameter end and minor diameter end, the outer wall of big diameter end with the inner wall sliding connection who supports a section of thick bamboo, big diameter end with the lower extreme of buffering spring is connected, minor diameter end with sliding rod connection.

Further, the sliding part further comprises a soft ring which is arranged in the supporting cylinder and used for sealing, and the soft ring is arranged at the small-diameter end of the step column.

Furthermore, the supporting cylinder is provided with a through hole, and the sliding rod penetrates through the through hole and has a gap with the through hole.

Further, the slider still include with the spliced pole that the lower extreme of slide bar is connected and the cover locate the adapter sleeve of spliced pole, the instrument with the adapter sleeve is connected.

Further, the spliced pole is equipped with the first perforation that runs through its setting, the connection cover be equipped with two second perforations that first perforation corresponds, first perforation and two it is fixed through the round pin silk between the second perforation.

Further, the slider still include with the backup pad that the adapter sleeve is fixed, the instrument is equipped with the mounting panel, the backup pad with mounting panel swing joint.

Further, the slide bar and the step post, and/or the connecting post are a fusion cast integral piece.

Further, the automatic lifting device of the instrument further comprises a sealing element connected with the spring connecting plate, the sealing element comprises a connecting rod connected with the spring connecting plate, an upper cover connected with the connecting rod and a sealing ring arranged in the upper cover, and the upper cover is connected with the supporting cylinder.

Furthermore, a plurality of through holes are formed in the connecting spring plate.

Compared with the prior art, the utility model provides an instrument automatic lifting device has following advantage:

the application provides an instrument automatic lifting device promotes the slide bar and drives the instrument through compressed air and removes, takes place deformation at above-mentioned in-process buffering spring to make the instrument remove in the opposite direction once more at the in-process of reconversion, thereby make the in-process of instrument round trip movement only need an air feed, when being used for the instrument test for a long time, effectively reduce the compressed gas consumption, the electric quantity of consumption when reducing the compressed gas distribution.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. In the drawings, there is shown in the drawings,

fig. 1 is a front view of an automatic lifting device for meters according to a preferred embodiment of the present invention;

FIG. 2 is a partial cross-sectional view of the automatic meter lifting device of FIG. 1;

FIG. 3 is a cross-sectional view of the automatic meter lifting device of FIG. 2 taken along line A-A;

FIG. 4 is a cross-sectional view of the automatic meter lifting device of FIG. 2 taken along line B-B;

FIG. 5 is a cross-sectional view of the automatic meter lifting device of FIG. 2 taken along line C-C;

FIG. 6 is a cross-sectional view of the automatic meter lifting device of FIG. 2 taken along line D-D;

fig. 7 is a rear view of the automatic lifting device for meters shown in fig. 1.

Reference numerals:

1-a supporting cylinder, 11-a cylinder body,

12-a fixing plate, 13-a fixing hole,

14-air inlet holes, 15-air outlet holes,

16-a first valve, 17-a second valve,

18-through hole, 101-first contact,

102-second junction, 103-third junction,

104-hose, 2-slider,

21-a slide bar, 22-a step column,

221-large diameter end, 222-small diameter end,

23-soft ring, 24-connecting column,

25-connecting sleeve, 26-supporting plate,

3-buffer spring, 4-connecting spring plate,

41-through holes, 5-sealing elements,

51-a connecting rod, 52-an upper cover,

521-an installation groove, 53-a sealing ring,

6-instrument, 61-mounting plate,

611-mounting holes, 612-screw rods,

613-nut.

Detailed Description

In order to make the objects, technical solutions and effects of the present invention more clear, the technical solutions of the present invention will be further described below with reference to the accompanying drawings and the detailed description. It should be understood that the detailed description and specific examples, while indicating the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.

As shown in fig. 1 and fig. 2, wherein fig. 1 is a front view of an automatic lifting device for meters according to a preferred embodiment of the present invention; fig. 2 is a partial sectional view of the automatic lifting device for meters shown in fig. 1.

The embodiment provides an automatic lifting device for an instrument, which comprises a supporting cylinder 1 with an accommodating space, a sliding part 2, a buffering spring 3, a spring connecting plate 4, and a compressed air distribution device (not shown) connected with the supporting cylinder 1 and used for providing compressed air, wherein the sliding part 2, the buffering spring 3 and the spring connecting plate 4 are all arranged in the supporting cylinder 1,

the sliding part 2 comprises a sliding rod 21, the sliding rod 21 is connected with the supporting cylinder 1 in a sliding manner, the lower end of the sliding rod 21 is connected with the instrument 6, the upper end of the sliding rod 21 is connected with the lower end of the buffer spring 3, the upper end of the buffer spring 3 is connected with the spring connecting plate 4,

the compressed air distribution device provides compressed air to enter the supporting cylinder 1, pushes the sliding rod 21 and drives the instrument 6 to move; when the buffer spring 3 is deformed and compressed air is not provided, the buffer spring 3 is restored to the original state under the action of elasticity, and pushes the slide rod 21 and drives the instrument 6 to move in the opposite direction.

The application provides an instrument automatic lifting device promotes the slide bar and drives the instrument through compressed air and removes, takes place deformation at above-mentioned in-process buffering spring to make the instrument remove in the opposite direction once more at the in-process of reconversion, thereby make the in-process of instrument round trip movement only need an air feed, when being used for the instrument test for a long time, effectively reduce the compressed gas consumption, the electric quantity of consumption when reducing the compressed gas distribution.

Referring to fig. 1 and 2, the support cylinder 1 includes a cylinder body 11 having an accommodating space, a fixing plate 12 mounted on an outer wall of the cylinder body 11, and a fixing hole 13 formed in the fixing plate 12.

Barrel 11 is upper end open-ended cylinder structure, fixed plate 12 is the right-angled plate structure, in this embodiment, fixed plate 12 weld in the right side middle part of barrel 11, fixed orifices 13 are the round hole structure, set up and are in the vertical portion of fixed plate 12 works as when instrument automatic lifting device is applied to the PH test, need with support section of thick bamboo 1 is fixed in on the PH value test section position, sets up two correspondences on the sheet metal component of PH value test section position the screw rod of fixed orifices 13 position will fixed orifices 13 inserts the screw rod to with nut locking screw rod, can with instrument automatic lifting device installs at PH value test section position.

The supporting cylinder 1 further comprises an air inlet hole 14 and an air outlet hole 15 which are arranged on two sides of the cylinder body 11, a first valve 16 which is arranged at the air inlet hole 14, and a second valve 17 which is arranged at the air outlet hole 15, wherein the first valve 16 is connected with the compressed air distribution device, the compressed air distribution device sends compressed air into the supporting cylinder 1 through the air inlet hole 14 through the first valve 16, and the compressed air is discharged out of the supporting cylinder 1 through the air outlet hole 15 through the second valve 17.

The air inlet hole 14 and the air outlet hole 15 are both in circular hole structures, the air inlet hole 14 is connected with the first valve 16 through a first connector 101, the first valve 16 is connected with the compressed air distribution device through a second connector 102, and the air outlet hole 15 is connected with the second valve 17 through a third connector 103.

Specifically, the port of the air inlet 14 is connected with the left pipe connection part of the first joint 101 in a seamless welding manner, the right threaded head of the first joint 101 is screwed and locked with the air outlet internal threaded end of the first valve 16, the air inlet threaded end of the first valve 16 is screwed and locked with the left threaded head of the second joint 102, the right pipe connection part of the second joint 102 is provided with a hose 104, and the hose 104 is connected with the air delivery head of the compressed air distribution device; and the port of the air outlet hole 15 is connected with the right pipe joint part of the third joint 103 in a seamless welding manner, and the left threaded head of the third joint 103 is locked with the air inlet internal threaded end of the second valve 17 in a threaded manner.

In this embodiment, the types of the first connector 101, the second connector 102 and the third connector 103 are all 20SP, the types of the first valve 16 and the second valve 17 are all electromagnetic valves, the types are N4V210-08, the power input lines of the first valve 16 and the second valve 17 are respectively connected to the power output ends of the time relays, the types of the time relays are DH48S-S, the time relays are provided with power plug lines, and the power plugs are connected to power sockets, so that the time relays are powered on, and the on-off time of the time relays needs to be set according to the staying time of the containers.

In this embodiment, when the first valve 16 is powered, compressed air will enter the support cylinder 1 through the air inlet 14, push the slide rod 21 and drive the meter 6 to move downward; so that the buffer spring 3 is deformed, namely stretched; when the second valve 17 is powered on, namely compressed air is not provided, the compressed air is subjected to the retraction action of the buffer spring 3, the buffer spring 3 is restored to the original state under the action of elasticity, namely, the buffer spring is in a retraction state, the slide rod 21 pushes and presses the compressed air, the compressed air can be discharged out of the support cylinder 1 through the air outlet 15 and drives the instrument 6 to move upwards in the opposite direction, and the instrument 6 moves upwards and downwards through one-time air supply.

The sliding part 2 comprises the sliding rod 21 and a step column 22 arranged in the supporting cylinder 1, and the sliding rod 21 is connected with the supporting cylinder 1 in a sliding manner.

The sliding rod 21 is used as a main body of the sliding part 2, the sliding rod 21 is connected with the supporting cylinder 1 in a sliding mode, the lower end of the sliding rod 21 is connected with the instrument 6, and the upper end of the sliding rod 21 is connected with the lower end of the buffer spring 3. In the present embodiment, the slide rod 21 is indirectly connected to the damper spring 3 through the step post 22, but the slide rod 21 may be directly connected to the damper spring 3.

Further, the supporting cylinder 1 is provided with a through hole 18, and the sliding rod 21 penetrates through the through hole 18 and has a gap with the through hole 18.

In this embodiment, the slide bar 21 is square rod structure, with the slide bar 21 complex the through-hole 18 also is square hole structure, the slide bar 21 runs through-hole 18 and with the gap has between the through-hole 18, the gap is 1 millimeter, and the compressed air of being convenient for can pass through the slide bar 21 with the gap entering of through-hole 18 in the downside space of a support section of thick bamboo 1, provide certain deformation space, the size in gap is according to the corresponding design of actual conditions.

The step column 22 is of a single-step cylindrical structure and comprises a large-diameter end 221 and a small-diameter end 222, the outer wall of the large-diameter end 221 is connected with the inner wall of the support cylinder 1 in a sliding mode, so that the step column 22 is guaranteed to move stably up and down in the support cylinder 1, the large-diameter end 221 is connected with the lower end of the buffer spring 3, and the small-diameter end 222 is connected with the sliding rod 21.

In this embodiment, the sliding rod 21 and the step pillar 22 are a fusion-cast integral piece, which is convenient to process and has strong integrity.

Referring to fig. 3, fig. 3 is a sectional view of the automatic lifting device of the meter shown in fig. 2 along the line a-a.

The sliding member 2 further includes a soft ring 23 disposed in the supporting cylinder 1 for sealing, and the soft ring 23 is disposed around the small diameter end 222 of the step pillar 22.

The soft ring 23 is fixedly bonded with the step column 22, specifically, the outer wall of the small-diameter end 222 of the step column 22 is uniformly coated with resin glue, and the inner wall of the soft ring 23 is bonded by the resin glue; the soft ring 23 is of a circular ring structure, is made of chloroprene rubber, is soft in texture and strong in wear resistance, the outer wall of the soft ring 23 slightly abuts against the inner wall of the supporting cylinder 1, and the soft ring 23 and the inner wall of the supporting cylinder 1 are matched to have good sealing performance, so that the step column 22 is pushed to move downwards more powerfully when compressed gas is poured into the upper side of the supporting cylinder 1.

As shown in fig. 1, the sliding member 2 further includes a connecting column 24 connected to the lower end of the sliding rod 21, and a connecting sleeve 25 sleeved on the connecting column 24, and the meter 6 is connected to the connecting sleeve 25, so that the meter 6 is convenient to mount and dismount.

Specifically, the connecting column 24 is a square column structure, the connecting sleeve 25 is sleeved on the connecting column 24, namely, the outer wall of the connecting column 24 is in sliding contact with the inner wall of the connecting sleeve 25, the connecting sleeve 25 cannot rotate on the connecting column 24, and the connecting sleeve 25 matched with the connecting column 24 is also in a square sleeve structure.

Referring to fig. 4, fig. 4 is a sectional view of the automatic lifting device of the meter shown in fig. 2 along the line B-B.

Further, the spliced pole 24 is equipped with the first perforation that runs through its setting, the adapter sleeve 25 be equipped with two second perforations that the first perforation corresponds, first perforation and two it is fixed through the round pin silk between the second perforation, be convenient for restrict the adapter sleeve 25 is deviate from downwards spliced pole 24 guarantees the stability of the two structures.

In this embodiment, the sliding rod 21 and the connecting column 24 are a fusion-cast integral piece, and are convenient to process and strong in integrity.

Referring to fig. 7, fig. 7 is a rear view of the automatic lifting device for meters shown in fig. 1.

Further, the sliding part 2 further comprises a supporting plate 26 fixed with the connecting sleeve 25, the meter 6 is provided with a mounting plate 61, and the supporting plate 26 is movably connected with the mounting plate 61.

As shown in fig. 4 and 7, specifically, the supporting plate 26 is a square plate structure, the front end of the instrument 6 is in sliding contact with the rear end of the supporting plate 26, the mounting plate 61 is symmetrically disposed on both sides of the instrument 6, the mounting plate 61 is provided with a mounting hole 611 and a screw 612 disposed at a position corresponding to the mounting hole 611, the mounting hole 611 is a circular hole structure, the screw 612 passes through the mounting hole 611 and is locked by a nut 613, when the nut 613 locks the screw 612, the instrument 6 can be stably mounted on the supporting plate 26 and thus stably mounted at the bottom of the sliding rod 21, when the instrument 6 needs to be verified and maintained, the disassembly is also very convenient, the nut 613 is unscrewed from the screw 612, and the mounting plate 61 is pulled out from the screw 612.

In this embodiment, the instrument 6 is a PH tester, the model is MIK-PH160, the instrument has a five-meter long data line, the data line is connected with a management computer, the communication protocol adopts MODBUS-RTU, the signal mode is RS485, and a probe of the PH tester has automatic temperature compensation, so as to ensure accurate measurement. Of course, the meter 6 can also be another meter depending on the production situation.

The buffer spring 3 is a spring, which is a mechanical part working by elasticity, is generally made of an elastic material, deforms under the action of external force, and recovers to the original shape under the action of the elastic force after the external force is removed. In this embodiment, the buffer spring 3 is of a stretch-and-retract type, and the buffer spring 3 can be extended by a distance that is required to enable the probe of the meter 6 to be normally inserted into the container.

The upper end of the sliding rod 21 is connected to the lower end of the buffer spring 3, and the upper end of the buffer spring 3 is connected to the spring connecting plate 4, in this embodiment, the sliding rod 21 is indirectly connected to the buffer spring 3 through the step post 22, and the initial stretching and retracting force of the buffer spring 3 should be greater than the gravity of the step post 22 and the upper connecting member, specifically, the initial stretching and retracting force of the buffer spring 3 is 20 newtons, and the gravity of the step post 22 and the upper connecting member is 11 newtons.

In this embodiment, when the sliding rod 21 moves downward due to the action of the compressed air, the buffer spring 3 is in a stretched deformation state, and when the compressed air is not provided, the buffer spring 3 is restored to the original state by the elastic force, i.e. in a retracted state, and the sliding rod 21 is pulled to push the compressed air. Of course, in other embodiments, depending on the structure, when the sliding rod 21 moves downward due to the action of the compressed air, the damping spring 3 may also be in a compressed deformation state, and when the compressed air is not provided, the damping spring 3 is restored to the original state by the elastic force, i.e. in a stretched state, and pulls the sliding rod 21 to push the compressed air.

The extensible distance of the buffer spring 3 is required to meet the requirement that the probe of the instrument 6 can be normally inserted into a container, and the pressure setting of the compressed air provided by the compressed air distribution device is as follows: when the supporting cylinder 1 is inflated, the buffer spring 3 can be normally stretched to a required length.

Referring to fig. 5, fig. 5 is a cross-sectional view of the automatic lifting device of the meter shown in fig. 2 along the line C-C.

The outer wall of the connecting spring plate 4 is in sliding contact with the inner wall of the supporting cylinder 1, a plurality of through holes 41 are formed in the connecting spring plate 4, and when compressed air enters the upper side of the inside of the supporting cylinder 1, the compressed air can be guided into the space on the lower side of the connecting spring plate 4 through the through holes 41, so that the compressed air can push the sliding part 2 conveniently.

The through holes 41 are annular and are uniformly distributed on the connecting spring plate 4, specifically, the longitudinal sections of the through holes 41 are isosceles trapezoids, the through holes 41 are wide at the top and narrow at the bottom, of course, the through holes 41 can be in other shapes and distribution modes, and can be designed correspondingly according to actual conditions and can only penetrate through compressed air.

Referring to fig. 6, fig. 6 is a cross-sectional view of the automatic lifting device of the meter shown in fig. 2 along the line D-D.

Further, the automatic lifting device for the instrument further comprises a sealing element 5 connected with the spring plate 4, wherein the sealing element 5 comprises a connecting rod 51 connected with the spring plate 4, an upper cover 52 connected with the connecting rod 51 and a sealing ring 53 arranged in the upper cover 52, and the upper cover 52 is connected with the support cylinder 1.

Specifically, the lower end of the connecting rod 51 is connected with the center of the connecting spring plate 4 by welding, and the upper end of the connecting rod 51 is connected with the center of the upper cover 52; the inner wall of the upper cover 52 is provided with internal threads, the upper end of the supporting cylinder 1 is provided with external threads, and the internal threads and the external threads are in threaded connection, so that parts in the supporting cylinder 1 can be conveniently taken out for maintenance; an installation groove 521 is formed in the upper cover 52, the installation groove 521 is of a circular groove structure, and the sealing ring 53 is an oil-immersed asbestos packing with a circular structure and is arranged in the installation groove 521; when the upper cover 52 is screwed with the support cylinder 1, the sealing ring 53 is pressed against the upper port of the support cylinder 1, so that the upper cover 52 has good sealing performance on the upper port of the support cylinder 1.

During disassembly, the pin wire is pulled out of the first through hole and the second through hole, the supporting plate 26 is pulled down, the connecting sleeve 25 can be pulled down from the connecting column 24, the upper cover 52 is screwed out of the external thread of the supporting cylinder 1, the upper cover 52 is pulled up, the sliding piece 2 can be pulled out of the supporting cylinder 1, and mechanical maintenance on the inner wall of the supporting cylinder 1 and other components is facilitated.

The use process of the automatic lifting device for the instrument is as follows:

the automatic instrument lifting device is arranged at a PH value testing section through the fixing plate 12;

when the first valve 16 is powered on, the compressed air distribution device provides compressed air, the compressed air can enter the support cylinder 1 through the air inlet 14 and is guided into the lower side space of the spring connecting plate 4 through the through hole 41, the soft ring 23 is matched with the inner wall of the support cylinder 1 to have good sealing performance, so that the step column 22 is pushed to move downwards more forcefully when the compressed air is filled into the upper side of the support cylinder 1, the sliding rod 21 is pushed and the instrument 6 is driven to move downwards, the probe of the instrument 6 is inserted into a container to perform PH detection, and meanwhile, the buffer spring 3 is deformed, namely stretched; when the second valve 17 is powered on, namely compressed air is not provided, the compressed air is subjected to the retraction action of the buffer spring 3, the buffer spring 3 is restored to the original state under the action of elasticity, namely in a retraction state, the step column 22 and the slide rod 21 are pulled to push and press the compressed air on the step column, the compressed air can be discharged out of the support cylinder 1 through the air outlet 15 and drive the instrument 6 to move upwards in the opposite direction, and the instrument 6 can move upwards and downwards through one-time air supply without changing the time relay control mode.

The above description is only the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any changes and alternatives that can be easily obtained by those skilled in the art within the technical scope described in the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. An automatic lifting device of an instrument is characterized by comprising a supporting cylinder (1) with an accommodating space, a sliding part (2), a buffering spring (3), a spring connecting plate (4) and a compressed air distribution device which is connected with the supporting cylinder (1) and used for providing compressed air, wherein the sliding part (2), the buffering spring (3) and the spring connecting plate (4) are all arranged in the supporting cylinder (1),

the sliding part (2) comprises a sliding rod (21), the sliding rod (21) is connected with the supporting cylinder (1) in a sliding manner, the lower end of the sliding rod (21) is connected with an instrument (6), the upper end of the sliding rod (21) is connected with the lower end of the buffer spring (3), the upper end of the buffer spring (3) is connected with the spring connecting plate (4),

the compressed air distribution device provides compressed air to enter the support cylinder (1), pushes the slide bar (21) and drives the instrument (6) to move; the buffer spring (3) is deformed, and when compressed air is not provided, the buffer spring (3) is restored under the action of elasticity, pushes the slide rod (21) and drives the instrument (6) to move in the opposite direction.

2. The automatic lifting device of the instrument as claimed in claim 1, wherein the sliding member (2) further comprises a step column (22) disposed in the supporting cylinder (1), the step column (22) comprises a large diameter end (221) and a small diameter end (222), an outer wall of the large diameter end (221) is slidably connected with an inner wall of the supporting cylinder (1), the large diameter end (221) is connected with a lower end of the buffer spring (3), and the small diameter end (222) is connected with the sliding rod (21).

3. The automatic lifting device for meters as claimed in claim 2, wherein the sliding member (2) further comprises a soft ring (23) disposed in the supporting cylinder (1) for sealing, the soft ring (23) is disposed around the small diameter end (222) of the step pillar (22).

4. The automatic lifting device for the instrument according to claim 1, characterized in that the supporting cylinder (1) is provided with a through hole (18), and the sliding rod (21) penetrates through the through hole (18) and has a gap with the through hole (18).

5. The automatic lifting device of the instrument as claimed in claim 2, wherein the sliding member (2) further comprises a connecting column (24) connected with the lower end of the sliding rod (21) and a connecting sleeve (25) sleeved on the connecting column (24), and the instrument (6) is connected with the connecting sleeve (25).

6. The automatic lifting device for the instrument according to claim 5, wherein the connecting column (24) is provided with a first perforation arranged through the connecting column, the connecting sleeve (25) is provided with two second perforations corresponding to the first perforation, and the first perforation and the two second perforations are fixed through a pin wire.

7. An automatic lifting device for meters according to claim 5, characterized in that the sliding part (2) further comprises a supporting plate (26) fixed with the connecting sleeve (25), the meter (6) is provided with a mounting plate (61), and the supporting plate (26) is movably connected with the mounting plate (61).

8. An automatic lifting device for meters according to claim 5, characterized in that the sliding rod (21) and the step column (22) and/or the connecting column (24) are made in one piece by casting.

9. The automatic lifting device for the instrument according to claim 1, further comprising a sealing member (5) connected with the connecting spring plate (4), wherein the sealing member (5) comprises a connecting rod (51) connected with the connecting spring plate (4), an upper cover (52) connected with the connecting rod (51), and a sealing ring (53) arranged in the upper cover (52), and the upper cover (52) is connected with the supporting cylinder (1).

10. The automatic lifting device of the instrument as claimed in claim 1, wherein the connecting spring plate (4) is provided with a plurality of through holes (41).

Images