CN214475493U - Liquid level measuring and alarming device - Google Patents

Abstract

The embodiment of the utility model provides a liquid level measurement alarm device, relate to liquid level measurement apparatus field, this liquid level measurement alarm device includes the mounting bracket, install the limit switch on the mounting bracket, install the alarm on the mounting bracket, connect in the measuring part of mounting bracket and the butt piece of being connected with the measuring part slidable, limit switch is provided with the trigger bar, the alarm is connected with the limit switch electricity, the measuring part is used for stretching into behind the liquid, slide for the mounting bracket, the butt piece is used for following the measuring part and slides for the mounting bracket, and the butt piece is used for the butt trigger bar, with closed limit switch, make alarm circular telegram report to the police. The liquid level measurement alarm device is high in measurement sensitivity and capable of rapidly sending out alarm signals, so that workers can timely react, and unnecessary loss is reduced.

Description

Liquid level measuring and alarming device

Technical Field

The utility model relates to a liquid level measurement apparatus field particularly, relates to a liquid level measurement alarm device.

Background

The condition of the underground hydrocarbon reservoir can be reflected by detecting the liquid level of the mud in the drilling process. In the prior art, a mud liquid level alarm measuring device is not sensitive enough to detect the mud liquid level and cannot send out an alarm in time.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a liquid level measurement alarm device, it can improve aforementioned technical problem effectively.

The embodiment of the utility model is realized like this:

in a first aspect, the utility model provides a liquid level measurement alarm device, include:

a mounting frame;

the limit switch is arranged on the mounting rack and is provided with a trigger rod;

the alarm is arranged on the mounting rack and is electrically connected with the limit switch;

the measuring piece is connected to the mounting frame in a sliding mode and used for sliding relative to the mounting frame after being stretched into liquid;

with the butt piece that the measuring part is connected, the butt piece is used for following the measuring part for the mounting bracket slides, just the butt piece is used for the butt the trigger bar, in order to close limit switch makes alarm circular telegram is reported to the police.

In an alternative embodiment, the abutting member includes a connecting plate and an abutting rod, the connecting plate is slidably connected to the mounting frame, one end of the abutting rod is connected to the measuring member, the other end of the abutting rod is connected to the connecting plate, and the abutting rod is used for abutting against the trigger rod.

In an optional embodiment, the mounting bracket is provided with a first chute, the connecting plate is provided with a limiting column, the limiting column is arranged at an interval with the abutting rod, the limiting column and the abutting rod are in sliding fit with the first chute, the trigger rod penetrates through the limiting column and the abutting rod, and the limiting column is used for abutting against the trigger rod to close the limit switch.

In an optional embodiment, the connecting plate is provided with a second sliding groove parallel to the first sliding groove, the abutting rod penetrates through the first sliding groove and the second sliding groove simultaneously, and the abutting piece further comprises a nut, wherein the nut is matched with the abutting rod and abuts against the connecting plate so as to relatively fix the abutting rod and the connecting plate.

In an alternative embodiment, the liquid level measuring alarm device comprises a fixing plate, the fixing plate is connected with the mounting frame, and the limit switch is detachably mounted on the fixing plate.

In an optional embodiment, the liquid level measurement alarm device further comprises an explosion-proof socket, the explosion-proof socket is installed on the fixing plate, and the explosion-proof socket is simultaneously electrically connected with the limit switch and the alarm.

In an optional embodiment, the mounting bracket is provided with a plurality of scale marks, and a plurality of the scale marks are distributed along the sliding direction interval of the measuring part, the liquid level measuring and alarming device further comprises an indicating part, the indicating part is mounted on the measuring part, and the indicating part moves relative to the mounting bracket along with the measuring part so as to indicate different scale marks.

In an optional embodiment, the measuring part comprises a transmission rod and a buoy barrel, the transmission rod is slidably connected with the mounting frame, the buoy barrel is connected with the bottom end of the transmission rod, and the buoy barrel is used for being placed in liquid.

In an optional embodiment, the measuring part further comprises a plug pin, the transmission rod is detachably connected with the buoy barrel, and the plug pin is simultaneously connected with the transmission rod and the buoy barrel so that the transmission rod and the buoy barrel are relatively fixed.

In an optional implementation mode, the mounting bracket is provided with a first chute, the length direction of the first chute is parallel to the sliding direction of the transmission rod, the abutting part comprises an abutting rod, the measuring part further comprises a lantern ring, the lantern ring is sleeved on the transmission rod, one end of the abutting rod is connected with the lantern ring, and the other end of the abutting rod is in sliding fit with the first chute.

The utility model discloses beneficial effect includes, for example:

the embodiment of the utility model provides a liquid level measurement alarm device, this liquid level measurement alarm device include mounting bracket, limit switch, alarm, measurement piece and butt piece, and this limit switch installs on the mounting bracket, and limit switch is provided with the trigger bar, and the alarm is installed on the mounting bracket, and the alarm is connected with the limit switch electricity, that is to say, limit switch can control opening or closing of alarm. The measuring piece is slidably connected with the mounting frame, the measuring piece can extend into the slurry, and when the slurry level rises or falls, the measuring piece correspondingly slides upwards or downwards relative to the mounting frame. The abutting part is connected with the measuring part, and the abutting part can slide relative to the mounting frame along with the measuring part in the sliding process of the measuring part relative to the mounting frame. After the slurry liquid level rises to a certain height, the supporting part can be supported against the trigger rod in the upward sliding process, and the limit switch is closed, so that the alarm is electrified to give an alarm. The liquid level measurement alarm device is sensitive to detection of the slurry liquid level height, and can remind workers of that the slurry liquid level reaches the preset height in time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural view of a liquid level measuring alarm device provided by an embodiment of the present invention;

fig. 2 is a schematic structural view of the liquid level measuring alarm device provided by the embodiment of the present invention at a first viewing angle after the outer shell is removed;

FIG. 3 is an enlarged schematic view at A in FIG. 2;

fig. 4 is a schematic structural view of the liquid level measuring alarm device provided by the embodiment of the present invention at a second viewing angle after the outer shell is removed;

FIG. 5 is an enlarged schematic view at B in FIG. 4;

FIG. 6 is an enlarged schematic view at C of FIG. 2;

fig. 7 is an enlarged schematic view of fig. 4 at D.

Icon: 1-liquid level measuring alarm device; 11-a mounting frame; 111-a first runner; 112-graduation mark; 12-limit switches; 121-a trigger lever; 13-an alarm; 14-a measuring member; 141-a transmission rod; 142-a buoy barrel; 143-a latch; 15-an abutment; 151-a butt link rod; 152-a connecting plate; 1521-a second chute; 153-limit posts; 154-a nut; 16-a collar; 17-a housing; 18-a fixed plate; 181-third runner; 19-an indicator; 20-explosion-proof socket.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Fig. 1 is a schematic structural diagram of a liquid level measurement alarm device 1 provided in this embodiment. Fig. 2 is a schematic structural diagram of the liquid level measurement alarm device 1 provided in this embodiment at a first viewing angle after the housing 17 is removed. Fig. 3 is an enlarged schematic view of a point a in fig. 2. Referring to fig. 1-3, the liquid level measuring and alarming device 1 provided in this embodiment includes a mounting frame 11, a limit switch 12, an alarm 13, a measuring part 14, and an abutting part 15, where the limit switch 12 is mounted on the mounting frame 11, the limit switch 12 is provided with a trigger rod 121, the alarm 13 is mounted on the mounting frame 11, and the alarm 13 is electrically connected to the limit switch 12, that is, the limit switch 12 can control the alarm 13 to be turned on or off. The measuring member 14 is slidably connected to the mounting frame 11, the measuring member 14 can be inserted into the slurry, and when the slurry level rises or falls, the measuring member 14 correspondingly slides upwards or downwards relative to the mounting frame 11. The abutment member 15 is connected to the measuring member 14, and during the sliding of the measuring member 14 relative to the mounting frame 11, the abutment member 15 follows the sliding of the measuring member 14 relative to the mounting frame 11. After the slurry level rises to a certain height, the abutting piece 15 abuts against the trigger rod 121 in the upward sliding process, the limit switch 12 is closed, and the alarm 13 is powered on to give an alarm. The liquid level measurement alarm device 1 is high in detection sensitivity of the slurry liquid level height, and can remind workers of the fact that the slurry liquid level reaches the preset height in time.

It should be noted that, in this embodiment, the alarm 13 is an audible and visual alarm 13, which not only can generate an alarm sound, but also can flash light, so as to be more easily noticed by the staff. In addition, in this embodiment, the alarm 13 is installed on the top of the mounting frame 11, so that the light emitted from the alarm 13 can be more conveniently seen by the workers at a distance in time.

Fig. 4 is a schematic structural diagram of the liquid level measurement alarm device 1 provided in this embodiment at a second viewing angle after the housing 17 is removed. Referring to fig. 1 to 4, in the present embodiment, the measuring member 14 includes a transmission rod 141 and a float bucket 142, the transmission rod 141 is slidably connected to the mounting frame 11, and the float bucket 142 is connected to a bottom end of the transmission rod 141. In practical application, the float bucket 142 is placed in the slurry liquid body, the float bucket 142 can float on the slurry, and after the slurry liquid level rises, the float bucket 142 moves upwards along with the slurry liquid body, so that the transmission rod 141 can be driven to slide upwards relative to the mounting frame 11.

In this embodiment the abutment 15 is mounted on the transmission rod 141, the transmission rod 141 being moved upwards, the abutment 15 following the transmission rod 141 being moved upwards. After the slurry level rises to a preset height, the abutting piece 15 abuts against the trigger rod 121 under the driving action of the transmission rod 141, the limit switch 12 is closed, and the alarm 13 is powered on to give an alarm.

It should be noted that, in this embodiment, the float bucket 142 can be used to follow the rise or fall of the mud level, and the sensitivity is higher. In addition, in the embodiment, the material of the float bucket 142 is stainless steel, which can improve the problem that the float bucket 142 is corroded by mud and rusts.

It should be noted that, in this embodiment, a detachable connection structure is adopted between the transmission rod 141 and the float bucket 142, so that the installation and the detachment are convenient. Specifically, referring to fig. 4, in this embodiment, the measuring member 14 further includes a latch 143, and after the transmission rod 141 is connected to the float bucket 142, the latch 143 is connected to both the transmission rod 141 and the float bucket 142, so that the transmission rod 141 and the float bucket 142 are relatively fixed. Thus, the float bucket 142 is not easily separated from the driving lever 141, and the driving lever 141 and the float bucket 142 can be moved in synchronization.

Fig. 5 is an enlarged schematic view of B in fig. 4. Referring to fig. 5, in the present embodiment, the liquid level measuring alarm device 1 further includes a collar 16, the collar 16 is mounted on the mounting frame 11, the transmission rod 141 is matched with the collar 16, and the collar 16 can limit the transmission rod 141 to move up and down along the vertical direction, so that the transmission rod 141 can be prevented from deflecting, and the measuring accuracy of the liquid level measuring alarm device 1 is effectively improved.

It should be noted that the number of collars 16 may be one, two, three, etc. Under the condition that the number of the lantern rings 16 is multiple, the lantern rings 16 are distributed at intervals along the length direction of the transmission rod 141, and the lantern rings 16 are sleeved on the transmission rod 141 at the same time, so that the limiting effect on the transmission rod 141 can be improved.

Referring to fig. 3, in the embodiment, the mounting frame 11 is provided with a first sliding slot 111, a length direction of the first sliding slot 111 is parallel to a sliding direction of the transmission rod 141, the abutting member 15 includes an abutting rod 151, one end of the abutting rod 151 is connected to the collar 16, and the other end of the abutting rod 151 is in sliding fit with the first sliding slot 111.

It will be appreciated that during the movement of the transmission rod 141 in the vertical direction, the collar 16 follows the movement of the transmission rod 141 and drives the abutment rod 151 to slide in the first sliding slot 111. The sliding fit between the abutting rod 151 and the first sliding chute 111 can guide the movement of the transmission rod 141, so that the transmission rod 141 is prevented from deviating from the original movement direction in the movement process, and the measurement accuracy of the liquid level measurement alarm device 1 can be improved.

It should be noted that, in the present embodiment, the friction between the transmission rod 141 and the collar 16 is small, the installation is convenient, and the noise can be effectively reduced.

Referring to fig. 1, in this embodiment, the liquid level measuring alarm device 1 further includes a housing 17, the housing 17 is mounted on the mounting frame 11, the housing 17 covers the transmission rod 141, and the transmission rod 141 penetrates through the housing 17. In this way, the housing 17 may shield the drive rod 141 and the collar 16.

Referring to fig. 3, in the present embodiment, the abutting member 15 further includes a connecting plate 152, the connecting plate 152 is provided with a limiting post 153, the limiting post 153 and the abutting rod 151 are arranged at an interval, the limiting post 153 and the abutting rod 151 are both in sliding fit with the first sliding groove 111, in the present embodiment, after the limiting post 153 or the abutting rod 151 abuts against the trigger rod 121, the limiting switch 12 can be controlled to be closed, so that the alarm 13 gives an alarm.

Specifically, in this embodiment, the abutting rod 151 is located below the trigger rod 121, and after the slurry level rises to a certain height, the abutting rod 151 abuts against the trigger rod 121 under the driving action of the transmission rod 141, so that the alarm 13 gives an alarm. The limiting column 153 is located above the trigger rod 121, and when the slurry level drops to a certain height, the limiting column 153 abuts against the trigger rod 121, so that the alarm 13 gives an alarm. Generally, when the volume of the slurry increases or decreases, the abutment rod 151 or the stopper rod 153 abuts against the trigger rod 121, and the alarm 13 gives an alarm.

In addition, in this embodiment, the limiting column 153 is matched with the first sliding groove 111, and can also play a role in guiding the moving direction of the connecting plate 152, so that the connecting plate 152 and the abutting rod 151 are not easy to deviate from the original moving direction in the moving process, and the measuring accuracy is effectively improved.

Referring to fig. 3, in the embodiment, the connection plate 152 is further provided with a second sliding slot 1521 parallel to the first sliding slot 111, the abutting rod 151 simultaneously passes through the first sliding slot 111 and the second sliding slot 1521, the abutting member 15 further includes a nut 154, the nut 154 is matched with the abutting rod 151 and abuts against the connection plate 152, so that the abutting rod 151 and the connection plate 152 are relatively fixed.

In actual use, the relative position between the abutting rod 151 and the connecting plate 152 can be adjusted by loosening the nut 154. For example, if the abutting rod 151 moves upward a partial distance with respect to the link plate 152, in the case where the height of the rise of the liquid level of the slurry is small, the abutting rod 151 abuts against the trigger rod 121, thereby causing the alarm 13 to alarm. If the abutting rod 151 moves a partial distance downward relative to the link plate 152, the abutting rod 151 abuts against the trigger rod 121 in the case where the height at which the liquid level of the slurry rises is large, so that the alarm 13 gives an alarm. That is, the adjustment of the relative position between the abutting rod 151 and the link plate 152 is different, and accordingly, the height of the slurry surface is different when the abutting rod 151 abuts against the trigger rod 121.

Referring to fig. 3, in the present embodiment, the liquid level measuring alarm device 1 further includes a fixing plate 18, the fixing plate 18 is connected to the mounting frame 11, and the limit switch 12 is detachably mounted on the fixing plate 18. In this way, the limit switch 12 can be adjusted in position on the fixed plate 18. Similarly to the effect achieved by changing the position of the abutting rod 151, when the abutting rod 151 abuts against the trigger rod 121 after the position of the limit switch 12 is changed, the height value of the slurry liquid surface is also different.

For example, if the limit switch 12 moves downward a partial distance with respect to the fixed plate 18, the abutting rod 151 abuts against the trigger rod 121 when the height of the rise of the slurry level is small, thereby causing the alarm 13 to alarm. If the limit switch 12 moves upward a certain distance relative to the fixed plate 18, the abutting rod 151 abuts against the trigger rod 121 when the height of the slurry level is high, so that the alarm 13 gives an alarm.

Specifically, referring to fig. 3, in the present embodiment, the fixing plate 18 is provided with a third sliding groove 181, a length direction of the first sliding groove 111, and a length direction of the second sliding groove 1521 are arranged in parallel, and the limit switch 12 is slidably engaged with the third sliding groove 181, so as to achieve a function of adjusting a position of the limit switch 12 in a vertical direction.

Fig. 6 is an enlarged schematic view at C in fig. 2. Referring to fig. 6 and fig. 4, in this embodiment, the mounting frame 11 is provided with a plurality of scale lines 112, the scale lines 112 are distributed at intervals along the sliding direction of the transmission rod 141, the liquid level measurement alarm device 1 further includes an indicator 19, the indicator 19 is connected with the transmission rod 141, the indicator 19 moves up and down along the vertical direction along with the transmission rod 141 in the process that the transmission rod 141 moves up and down along the vertical direction, so that when the mud liquid level is different, the indicator 19 points to different scale lines 112, and a worker can obtain a specific liquid level height value of the mud according to the value of the scale line 112.

Fig. 7 is an enlarged schematic view of fig. 4 at D. Referring to fig. 7, in the present embodiment, the liquid level measuring alarm device 1 further includes an explosion-proof socket 20, the explosion-proof socket 20 is mounted on the fixing plate 18, and the explosion-proof socket 20 is electrically connected to the limit switch 12 and the alarm 13 at the same time.

It should be noted that, in this embodiment, the explosion-proof socket 20 may be externally connected with a power supply, and the external power supply supplies power to the limit switch 12 and the alarm 13. Generally, the housing of the explosion-proof socket 20 is made of aluminum alloy by pressing, the internal electrical components are subjected to explosion-proof treatment, and all the electrical components capable of generating electric sparks are sealed to isolate the electrical components from the outside dangerous gas.

In addition, in this embodiment, the explosion-proof socket 20 is vertically arranged, and can play a waterproof role, so that the failure rate of the explosion-proof socket 20 can be reduced.

To sum up, this embodiment provides a liquid level measurement alarm device 1, and this liquid level measurement alarm device 1's sensitivity is higher, can in time send alarm signal for the staff can in time react, reduces the unnecessary loss.

The above description is only exemplary of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A liquid level measurement warning device, comprising:

a mounting frame (11);

the limiting switch (12) is mounted on the mounting rack (11), and the limiting switch (12) is provided with a trigger rod (121);

the alarm (13) is mounted on the mounting rack (11), and the alarm (13) is electrically connected with the limit switch (12);

a measuring member (14), the measuring member (14) being slidably connected to the mounting frame (11), the measuring member (14) being adapted to slide relative to the mounting frame (11) after being inserted into the liquid;

and an abutting piece (15) connected with the measuring piece (14), wherein the abutting piece (15) is used for following the measuring piece (14) to slide relative to the mounting frame (11), and the abutting piece (15) is used for abutting against the trigger rod (121) to close the limit switch (12), so that the alarm (13) is electrified to alarm.

2. The liquid level measurement warning device according to claim 1, characterized in that the abutment member (15) comprises a web (152) and an abutment rod (151), the web (152) being slidably connected to the mounting frame (11), one end of the abutment rod (151) being connected to the measuring member (14), the other end of the abutment rod (151) being connected to the web (152), the abutment rod (151) being adapted to abut the trigger rod (121).

3. The liquid level measuring and alarming device according to claim 2, wherein the mounting frame (11) is provided with a first sliding groove (111), the connecting plate (152) is provided with a limiting column (153), the limiting column (153) and the abutting rod (151) are arranged at intervals, the limiting column (153) and the abutting rod (151) are both in sliding fit with the first sliding groove (111), the trigger rod (121) is arranged between the limiting column (153) and the abutting rod (151) in a penetrating manner, and the limiting column (153) is used for abutting against the trigger rod (121) to close the limit switch (12).

4. The liquid level measuring alarm device according to claim 3, wherein the connecting plate (152) is provided with a second sliding groove (1521) parallel to the first sliding groove (111), the abutting rod (151) penetrates through the first sliding groove (111) and the second sliding groove (1521) simultaneously, the abutting piece (15) further comprises a nut (154), and the nut (154) is matched with the abutting rod (151) and abuts against the connecting plate (152) so as to fix the abutting rod (151) and the connecting plate (152) relatively.

5. The liquid level measuring alarm device according to any one of claims 1-4, characterised in that the liquid level measuring alarm device (1) comprises a fixing plate (18), the fixing plate (18) being connected with the mounting frame (11), the limit switch (12) being detachably mounted on the fixing plate (18).

6. The liquid level measuring alarm device according to claim 5, characterized in that the liquid level measuring alarm device (1) further comprises an explosion-proof socket (20), the explosion-proof socket (20) is mounted on the fixing plate (18), and the explosion-proof socket (20) is electrically connected with the limit switch (12) and the alarm (13) at the same time.

7. The liquid level measuring alarm device according to any one of claims 1-4, wherein the mounting frame (11) is provided with a plurality of graduation marks (112), the plurality of graduation marks (112) are distributed at intervals along the sliding direction of the measuring member (14), the liquid level measuring alarm device (1) further comprises an indicating member (19), the indicating member (19) is mounted on the measuring member (14), and the indicating member (19) moves relative to the mounting frame (11) along with the measuring member (14) to indicate different graduation marks (112).

8. The level measuring alarm device according to claim 1, characterised in that the measuring member (14) comprises a transmission rod (141) and a float bowl (142), the transmission rod (141) being slidably connected to the mounting frame (11), the float bowl (142) being connected to the bottom end of the transmission rod (141), the float bowl (142) being intended to be placed in the liquid.

9. The level measuring alarm device according to claim 8, wherein the measuring member (14) further comprises a latch (143), the transmission rod (141) is detachably connected with the float bucket (142), and the latch (143) is connected with the transmission rod (141) and the float bucket (142) at the same time, so that the transmission rod (141) and the float bucket (142) are relatively fixed.

10. The liquid level measuring alarm device according to claim 8, wherein the mounting rack (11) is provided with a first sliding groove (111), the length direction of the first sliding groove (111) is parallel to the sliding direction of the transmission rod (141), the abutting part (15) comprises an abutting rod (151), the measuring part (14) further comprises a collar (16), the collar (16) is sleeved on the transmission rod (141), one end of the abutting rod (151) is connected with the collar (16), and the other end of the abutting rod (151) is in sliding fit with the first sliding groove (111).

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