CN108981841B

CN108981841B - Frost crack prevention device for water meter in winter

Info

Publication number: CN108981841B
Application number: CN201810558595.0A
Authority: CN
Inventors: 蒋立勋
Original assignee: Wuhu Baichuan Water Supply Equipment Co ltd
Current assignee: Wuhu Baichuan Water Supply Equipment Co ltd
Priority date: 2018-06-01
Filing date: 2018-06-01
Publication date: 2020-07-21
Anticipated expiration: 2038-06-01
Also published as: CN108981841A

Abstract

The invention discloses an anti-frost-crack device for a water meter in winter, which relates to the field of water meter protection and comprises a placing box body, a base and a controller, wherein a rectangular placing room is arranged in the placing box body, the central position in the base is fixedly connected with the lower end of a transmission mechanism, the left end and the right end of the transmission mechanism are meshed with one end of a lifting mechanism, the other end of the lifting mechanism is fixedly connected with the bottom of a clamping mechanism, the top end of the clamping mechanism is clamped with a positioning locking mechanism, the water meter is placed in the rectangular placing room, the transmission mechanism drives the lifting mechanism by pressing the placing box body downwards, a clamping rod in the clamping mechanism is moved out of a clamping rod groove, the locking rod locks the placing box body and a protective cover under the elastic force of a third spring, so that the water meter obtains the heat preservation effect in the rectangular placing room, and the water meter is prevented from frost, thereby facilitating daily life.

Description

Frost crack prevention device for water meter in winter

Technical Field

The invention relates to the field of water meter protection, in particular to an anti-frost-crack device for a water meter in winter.

Background

The water meter is an essential instrument in modern life, and is generally divided into a positive displacement water meter and a speed water meter, when the specification of the water meter is selected, the size and the flow range of the flow used under the normal condition are firstly estimated, and then the water meter with the specification of which the common flow is closest to the value is selected as the first choice.

Disclosure of Invention

The invention aims to provide an anti-frost-cracking device for a water meter in winter, which is used for solving the defects caused in the prior art.

The utility model provides a water gauge is with preventing frostbite and splits device in winter, includes places box, base and protection casing, the left and right sides both ends of placing the box are close to the bottom position and are equipped with the locking groove, and the inside of placing the box is equipped with the rectangle and places the room, the opening that the rectangle was placed the room is upwards, and the front and back lateral wall that the rectangle was placed the room is equipped with first pipe channel, the protection casing is used for from placing the opening that the box top was buckled rectangle placed downwards, the front and back lateral wall of protection casing is equipped with the second pipe channel, and the left and right sides both ends of protection casing are close to the lower part position and are equipped with the locking hole that corresponds with the locking groove, the inside cavity of base, the inside central point of base puts and drive mechanism's lower extreme fixed connection, drive mechanism's top and the bottom central point fixed connection of placing the box, drive mechanism, the top end of the clamping mechanism is clamped with the positioning locking mechanism, and the positioning locking mechanism is connected with the base in a sliding mode.

Preferably, the transmission mechanism comprises a transmission rod, a bevel gear rod and a first rotating shaft, a transmission rod groove is formed in the center of the base, the transmission rod is connected with the transmission rod groove in a sliding mode, the top of the transmission rod is fixedly connected with the center of the bottom of the placing box body, the bottom of the transmission rod is fixedly connected with one end of a second spring, the other end of the second spring is fixedly connected with the bottom of the transmission rod groove, the left side and the right side, close to the bottom, of the transmission rod are fixedly connected with one end of a transmission rack rod, a rack is arranged at the other end of the transmission rack rod, the front end and the rear end of the first rotating shaft are rotatably connected with the front side wall and the rear side wall of the hollow inside of the base, the first rotating shaft is sequentially connected with the main bevel gear and the driving wheel key from front to rear, the driving wheel is meshed with the rack, the bevel gear, the bottom end of the bevel gear rod is in key connection with the auxiliary bevel gear, the auxiliary bevel gear is meshed with the main bevel gear, the bevel gear rod is rotatably connected with the upper end of the support, the support is fixedly connected with the hollow bottom end inside the base, and the auxiliary bevel gear is meshed with one end of the lifting mechanism.

Preferably, the lifting mechanism comprises a linkage rod, a fixed rod and a pushing plate, the fixed rod is fixed at the hollow bottom end in the base, the linkage rod passes through the position of the fixed rod close to the bottom end and is rotatably connected with the fixed rod, one end of the linkage rod is in key connection with a linkage bevel gear, the linkage bevel gear is meshed with an auxiliary bevel gear, transmission worm gears in key connection with the linkage rod are symmetrically arranged at the left end and the right end of the fixed rod, a lifting cam is arranged right above the transmission worm gears and is rotatably connected with a cam shaft, the cam shaft is fixedly connected with the hollow front side wall and the hollow rear side wall in the base, the bottom surface of the lifting cam is provided with an arc tooth surface, the pushing plate is positioned right above the lifting cam, a first chute is arranged in the fixed rod, second chutes are arranged at the left end and the right end of the first chute, the upper end of the first chute is opened, the bottom center position of slurcam is fixedly connected with one end of a second spring, the other end of the second spring is fixedly connected with the lower end of a first chute, one end of a clamping mechanism is connected with the first chute in a sliding manner and is fixedly connected with the upper center position of the slurcam.

Preferably, the clamping mechanism comprises a push rod, a second hinged rod and a connecting rod, the bottom end of the push rod is fixedly connected with the upper central position of the push plate, the top of the push rod is hinged with one end of the first hinged rod, the other end of the first hinged rod is provided with a first cavity, one end of the second hinged rod is hinged with one end of a third hinged rod, the other end of the second hinged rod is provided with a second cavity, the middle position of the second hinged rod is rotatably connected with a third hinged rod, the two ends of the third hinged rod are fixedly connected with the front and rear hollow side walls in the base, one end of the connecting rod is slidably connected with the first cavity, the other end of the connecting rod is slidably connected with the second cavity, the other end of the third hinged rod is hinged with the middle part of the clamping rod, the right end of the clamping rod is rotatably connected with a second rotating shaft, and the left end of the clamping rod is clamped with the bottom of the positioning and locking mechanism, the second rotating shaft is fixedly connected with the hollow front side wall and the hollow rear side wall inside the base.

Preferably, location locking mechanism includes check lock lever, pulling rod, third spring and clamping rod groove, the base is close to upper end border position from the top down and is equipped with pulling rod groove and check lock lever groove in proper order, clamping rod groove and check lock lever groove intercommunication, the bottom and the locking rod groove sliding connection of check lock lever, the bottom surface of check lock lever bottom is equipped with the clamping groove corresponding with the check lock lever, one end and the one side fixed connection in check lock lever groove of third spring, the other end and the one side fixed connection of check lock lever bottom of third spring, pulling rod and pulling rod groove sliding connection, the bottom of pulling rod and the position fixed connection that the check lock lever is close to the bottom, the top and the locking groove of check lock lever and locking hole are corresponding.

Preferably, still include the bracing piece, the bottom of placing the box evenly is equipped with the slip chamber, the upper end and the slip chamber sliding connection of bracing piece, the lower extreme of bracing piece and the last fixed surface of base are connected, and the cover has first spring on the bracing piece, the one end of first spring and the bottom fixed connection of placing the box, the other end of first spring and the last fixed surface of base are connected.

Preferably, a heat insulation layer is arranged in the rectangular placing room.

The invention has the advantages that: by adopting the frost crack prevention device for the water meter in winter, the transmission mechanism drives the lifting mechanism by placing the water meter in the rectangular placing room and pressing down the placing box body, so that the clamping rod in the clamping mechanism moves out of the clamping rod groove, and the locking rod locks the placing box body and the protective cover under the elastic force of the third spring, so that the water meter obtains a heat preservation effect in the rectangular placing room, and the frost crack of the water meter caused by over-low temperature in winter is prevented, thereby facilitating daily life.

Drawings

FIG. 1 is a schematic diagram of an anti-freeze-cracking device for a winter water meter;

FIG. 2 is a schematic diagram of the protective cover of the anti-freeze device for the winter water meter;

FIG. 3 is an enlarged view of the transmission of FIG. 1;

FIG. 4 is an enlarged view of the lift mechanism of FIG. 1;

FIG. 5 is an enlarged view of the clamping mechanism of FIG. 1;

fig. 6 is a sectional view taken along line a-a in fig. 4.

Wherein, 1-a placing box body, 2-a base, 3-a protective cover, 4-a transmission mechanism, 40-a transmission rod, 41-a transmission rack rod, 42-a second spring, 43-a transmission rod groove, 44-a bevel gear rod, 45-a driving wheel, 46-a main bevel gear, 47-a first rotating shaft, 48-a slave bevel gear, 49-an auxiliary bevel gear, 5-a lifting mechanism, 50-a linkage rod, 51-a linkage bevel gear, 52-a fixed rod, 53-a transmission turbine, 54-a lifting cam, 55-a pushing plate, 56-a second spring, 57-a first sliding groove, 58-a second sliding groove, 59-an arc tooth surface, 6-a clamping mechanism, 60-a second rotating shaft, 61-a first hinged rod and 62-a second hinged rod, 63-third hinge rod, 64-push rod, 65-clamping rod, 66-connecting rod, 67-third rotating rod, 68-second cavity, 69-first cavity, 7-positioning locking mechanism, 70-clamping groove, 71-locking rod, 72-pulling rod, 73-third spring, 74-pulling rod groove, 75-locking rod groove, 76-clamping rod groove, 8-rectangular placement room, 9-first duct groove, 10-second duct groove, 11-locking groove, 12-locking hole, 13-sliding cavity, 14-supporting rod, 15-first spring.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1 to 6, a frost crack prevention device for a water meter in winter comprises a placing box body 1, a base 2 and a protective cover 3, wherein locking grooves 11 are arranged at the positions, close to the bottom, of the left end and the right end of the placing box body 1, a rectangular placing room 8 is arranged in the placing box body 1, the opening of the rectangular placing room 8 is upward, first pipeline grooves 9 are arranged on the front side wall and the rear side wall of the rectangular placing room 8, the protective cover 3 is used for buckling the opening of the rectangular placing part 8 downwards from the top of the placing box body 1, second pipeline grooves 10 are arranged on the front side wall and the rear side wall of the protective cover 3, locking holes 12 corresponding to the locking grooves 11 are arranged at the positions, close to the lower part, of the left end and the right end of the protective cover 3, the inside of the base 2 is hollow, the center position of the inside of the base 2 is, the left end and the right end of the transmission mechanism 4 are meshed with one end of the lifting mechanism 5, the other end of the lifting mechanism 5 is fixedly connected with the bottom of the clamping mechanism 6, the top end of the clamping mechanism 6 is connected with the positioning locking mechanism 7 in a clamping mode, and the positioning locking mechanism 7 is connected with the base 2 in a sliding mode.

It should be noted that the transmission mechanism 4 includes a transmission rod 40, a bevel gear rod 44 and a first rotation shaft 47, the base 2 is provided with a transmission rod groove 43 at a central position, the transmission rod 40 is slidably connected with the transmission rod groove 43, the top of the transmission rod 40 is fixedly connected with the central position of the bottom of the placing case 1, the bottom of the transmission rod 40 is fixedly connected with one end of a second spring 42, the other end of the second spring 42 is fixedly connected with the bottom of the transmission rod groove 43, the left and right sides of the transmission rod 40 near the bottom end position are fixedly connected with one end of a transmission rack rod 41, the other end of the transmission rack rod 41 is provided with a rack, the front and rear ends of the first rotation shaft 47 are rotatably connected with the hollow front and rear side walls inside the base 2, the first rotation shaft 47 is sequentially connected with a main bevel gear 46 and a driving wheel 45 from front to rear, the driving wheel 45 is engaged with the rack, the bevel gear rod 44 is located, the top end of the bevel gear rod 44 is in key connection with a secondary bevel gear 48, the bottom end of the bevel gear rod 44 is in key connection with a secondary bevel gear 49, the secondary bevel gear 48 is meshed with the main bevel gear 46, the bevel gear rod 44 is rotatably connected with the upper end of a support, the support is fixedly connected with the hollow bottom end inside the base 2, and the secondary bevel gear 49 is meshed with one end of the lifting mechanism 5.

In this embodiment, the lifting mechanism 5 includes a linkage rod 50, a fixing rod 52 and a pushing plate 55, the fixing rod 52 is fixed at the hollow bottom end inside the base 2, the linkage rod 50 passes through the position of the fixing rod 52 near the bottom end and is rotatably connected with the fixing rod 52, one end of the linkage rod 50 is in key connection with a linkage bevel gear 51, the linkage bevel gear 51 is meshed with a secondary bevel gear 49, transmission worm gears 53 in key connection with the linkage rod 50 are symmetrically arranged at the left and right ends of the fixing rod 52, a lifting cam 54 is arranged right above the transmission worm gears 53, the lifting cam 54 is rotatably connected with a cam shaft, the cam shaft is fixedly connected with the hollow front and rear side walls inside the base 2, an arc-shaped tooth surface 59 is arranged at the bottom surface of the lifting cam 54, the pushing plate 55 is located right above the lifting cam 54, a first chute 57 is, both ends are equipped with second spout 58 about first spout 57, the upper end opening of first spout 57, catch plate 55 and first spout 57 and second spout 58 sliding connection, the bottom central point of catch plate 55 puts and the one end fixed connection of second spring 56, the other end of second spring 56 and the lower extreme fixed connection of first spout 57, chucking mechanism 6's one end and first spout 57 sliding connection and its upper portion central point with catch plate 55 put fixed connection.

Preferably, the clamping mechanism 6 comprises a pushing rod 64, a second hinge rod 62 and a connecting rod 66, the bottom end of the pushing rod 64 is fixedly connected with the upper central position of the pushing plate 55, the top of the pushing rod 64 is hinged with one end of the first hinge rod 61, the other end of the first hinge rod 61 is provided with a first cavity 69, one end of the second hinge rod 62 is hinged with one end of a third hinge rod 63, the other end of the second hinge rod 62 is provided with a second cavity 68, the middle position of the second hinge rod 62 is rotatably connected with a third rotating rod 67, the two ends of the third rotating rod 67 are fixedly connected with the hollow front and rear side walls in the base 2, one end of the connecting rod 66 is slidably connected with the first cavity 69, the other end of the connecting rod 66 is slidably connected with the second cavity 68, the other end of the third hinge rod 63 is hinged with the middle part of the clamping rod 65, the right end of the clamping rod 65 is rotatably connected with the second rotating shaft 60, the left end of clamping rod 65 and the bottom joint of location locking mechanism 7, second pivot 60 and the inside hollow front and back lateral wall fixed connection of base 2.

In this embodiment, location locking mechanism 7 includes locking lever 71, pulling rod 72, third spring 73 and chucking rod groove 76, base 2 is close to upper end border position from the top down and is equipped with pulling rod groove 74 and locking rod groove 75 in proper order, chucking rod groove 76 and locking rod groove 75 intercommunication, the bottom and the locking rod groove 75 sliding connection of locking lever 71, the bottom surface of locking lever 71 bottom is equipped with the chucking groove 70 corresponding with chucking rod 65, one end and the one side fixed connection in locking rod groove 75 of third spring 73, the other end and the one side fixed connection of locking lever 71 bottom of third spring 73, pulling rod 72 and pulling rod groove 74 sliding connection, the bottom of pulling rod 72 and the position fixed connection that locking lever 71 is close to the bottom, the top and the locking groove 11 of locking lever 71 and locking hole 12 are corresponding.

In this embodiment, still include bracing piece 14, the bottom of placing box 1 evenly is equipped with sliding chamber 13, the upper end and the sliding chamber 13 sliding connection of bracing piece 14, the lower extreme of bracing piece 14 and the last fixed surface of base 2 are connected, and the cover has first spring 15 on the bracing piece 14, the one end of first spring 15 and the bottom fixed connection of placing box 1, the other end of first spring 15 and the last fixed surface of base 2 are connected.

In addition, an insulating layer is arranged in the rectangular placing room 19.

The working process and principle are as follows: when the device is not used, the left end of the clamping rod 64 is clamped in the clamping groove 70 to fix the locking rod 71, when the water meter needs to be prevented from being frozen in winter, firstly, the first pipeline groove 9 in the device is arranged along the water pipes at the two ends of the water meter to enable the water meter to be placed in the rectangular placing room 8, then the protective cover 3 is arranged along the placing box body 1 to buckle the placing box body 1 from top to bottom and enable the placing box body 1 to move downwards, so that the transmission rod 40 overcomes the elastic force of the second spring 42 to move downwards along the transmission rod groove 43, further the transmission rack rod 41 moves along with the downward movement of the transmission rod 40, as the rack on the transmission rack rod 41 is meshed with the driving wheel 45, further the driving wheel 45 rotates, the driving wheel 45 drives the first rotating shaft 47 to rotate, further drives the main bevel gear 46 to rotate, so that the auxiliary bevel gear 48 rotates through meshing, further drives the bevel gear rod 44 to rotate, the auxiliary bevel gear 49 is rotated, the linkage bevel gear 51 is linked due to the meshing with the auxiliary bevel gear 49, and then the linkage rod 50 is rotated, the linkage rod 50 rotates to drive the transmission worm gear 53 to rotate, the worm gear 53 rotates to drive the arc-shaped tooth surface 59 on the ground of the lifting cam 54 to rotate, and further drive the lifting cam 54 to rotate around the rotating shaft, because the lifting cam 54 is always in contact with the push rod 55, the push rod 55 moves upwards in the first chute 57 against the second spring 56, because the push rod 55 is fixedly connected with the push rod 64, the push rod 64 moves upwards, at the moment, the end of the first hinge rod 61 hinged with the push rod 64 moves upwards and linearly, because the third rotating rod 67 is fixed, under the action of the connecting rod 66, the second hinge rod 62 is driven to rotate around the third rotating rod 67, and the end of the second hinge rod 62 hinged with the third hinge rod 63 moves downwards integrally, when the end of the second cross-connecting rod 62 hinged with the third hinge-connecting rod 63 integrally moves downwards, the third hinge-connecting rod 63 pulls the clamping rod 65 to be pulled out of the clamping groove 70, at this time, the third spring 73 pushes the locking rod 71 to move in the locking rod groove 70 towards the direction close to the shield 3, when the upper end of the locking rod 71 moves into the locking hole 12 of the shield 3 and the locking groove 11 of the placing box 1, the shield 3, the placing box 1 and the locking rod 71 are just connected tightly, so that the water meter is located in a closed space to play a role of heat preservation, after the winter is over, the pulling rod 72 is manually moved, so that the pulling rod 72 pulls the locking rod 71 to move away from the shield 3 against the elastic force of the third spring 73, when the locking rod 71 moves out of the locking groove 11 and the locking hole 12, the shield 3 is upwardly taken away, and the device is removed, at this time, the third hinge-connecting rod 63 is under the elastic force of the second spring 42 upwards by the transmission rod 40, the clamping rod 65 is propped, the left end of the clamping rod 65 is propped against the locking rod 71, when the water meter leaves the device, the pulling rod 72 is released, at the moment, the locking rod 71 moves under the elastic force of the third spring 73, when the clamping groove 76 moves to the clamping rod 65, the clamping rod 65 is clamped into the clamping groove 76, the next use is facilitated, and in addition, the supporting rod 14 plays a role in fixing.

Based on the above, by adopting the frost crack prevention device for the water meter in winter, the transmission mechanism drives the lifting mechanism by placing the water meter in the rectangular placing room and pressing down the placing box body, so that the clamping rod in the clamping mechanism moves out of the clamping rod groove, and the locking rod locks the placing box body and the protective cover under the elastic force of the third spring, so that the water meter obtains the heat preservation effect in the rectangular placing room, the frost crack of the water meter caused by over-low temperature in winter is prevented, and the daily life is facilitated.

It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the invention are intended to be embraced therein.

Claims

1. The utility model provides a water gauge is with preventing frostbite and splits device in winter, its characterized in that, including placing box (1), base (2) and protection casing (3), the left and right sides both ends of placing box (1) are close to the bottom position and are equipped with locking groove (11), and the inside of placing box (1) is equipped with the rectangle and places between (8), the opening of placing between (8) of rectangle is upwards, and the rectangle is placed between the front and back lateral wall of (8) and is equipped with first pipe-line groove (9), protection casing (3) are used for following the opening of placing box (1) top downwards lock rectangle placing member (8), the front and back lateral wall of protection casing (3) is equipped with second pipe-line groove (10), and the left and right sides both ends of protection casing (3) are close to the lower part position and are equipped with locking hole (12) corresponding with locking groove (11), the inside cavity of base (2), the inside central point of base (2) puts and, the top end of the transmission mechanism (4) is fixedly connected with the central position of the bottom of the placing box body (1), the left end and the right end of the transmission mechanism (4) are meshed with one end of the lifting mechanism (5), the other end of the lifting mechanism (5) is fixedly connected with the bottom of the clamping mechanism (6), the top end of the clamping mechanism (6) is clamped with the positioning locking mechanism (7), and the positioning locking mechanism (7) is in sliding connection with the base (2);

the transmission mechanism (4) comprises a transmission rod (40), a bevel gear rod (44) and a first rotating shaft (47), a transmission rod groove (43) is formed in the center of the base (2), the transmission rod (40) is in sliding connection with the transmission rod groove (43), the top of the transmission rod (40) is fixedly connected with the center of the bottom of the box body (1), the bottom of the transmission rod (40) is fixedly connected with one end of a second spring (42), the other end of the second spring (42) is fixedly connected with the bottom of the transmission rod groove (43), the left side and the right side of the transmission rod (40) close to the bottom of the transmission rod are fixedly connected with one end of a transmission rack rod (41), a rack is arranged at the other end of the transmission rack rod (41), the front end and the rear end of the first rotating shaft (47) are rotatably connected with the front side wall and the rear side wall of the hollow inside of the base (2), and the first rotating shaft (47) is sequentially connected with a main bevel gear (46) and, the driving wheel (45) is meshed with the rack, the bevel gear rod (44) is located right below the main bevel gear (46), the top end of the bevel gear rod (44) is in key connection with the secondary bevel gear (48), the bottom end of the bevel gear rod (44) is in key connection with the secondary bevel gear (49), the secondary bevel gear (48) is meshed with the main bevel gear (46), the bevel gear rod (44) is in rotary connection with the upper end of the support, the support is fixedly connected with the hollow bottom end inside the base (2), and the secondary bevel gear (49) is meshed with one end of the lifting mechanism (5);

the lifting mechanism (5) comprises a linkage rod (50), a fixing rod (52) and a pushing plate (55), the fixing rod (52) is fixed at the hollow bottom end inside the base (2), the linkage rod (50) penetrates through the position, close to the bottom end, of the fixing rod (52) and is rotatably connected with the fixing rod (52), one end of the linkage rod (50) is in key connection with a linkage bevel gear (51), the linkage bevel gear (51) is meshed with an auxiliary bevel gear (49), transmission worm gears (53) in key connection with the linkage rod (50) are symmetrically arranged at the left end and the right end of the fixing rod (52), a lifting cam (54) is arranged right above the transmission worm gears (53), the lifting cam (54) is rotatably connected with a cam shaft, the cam shaft is fixedly connected with the front side wall and the rear side wall inside the base (2) in a hollow mode, and an arc-shaped tooth surface (59) is, the improved structure is characterized in that the pushing plate (55) is located right above the lifting cam (54), a first sliding groove (57) is formed in the fixing rod (52), second sliding grooves (58) are formed in the left end and the right end of the first sliding groove (57), the upper end of the first sliding groove (57) is open, the pushing plate (55) is connected with the first sliding groove (57) and the second sliding groove (58) in a sliding mode, the center of the bottom of the pushing plate (55) is fixedly connected with one end of a second spring (56), the other end of the second spring (56) is fixedly connected with the lower end of the first sliding groove (57), and one end of the clamping mechanism (6) is fixedly connected with the first sliding groove (57) in a sliding mode and the center of the upper portion of the clamping mechanism is fixedly connected with the pushing plate (55).

2. The frost crack prevention device for a winter water meter as claimed in claim 1, wherein: the clamping mechanism (6) comprises a push rod (64), a second hinged rod (62) and a connecting rod (66), the bottom end of the push rod (64) is fixedly connected with the upper center of a push plate (55), the top of the push rod (64) is hinged with one end of a first hinged rod (61), the other end of the first hinged rod (61) is provided with a first cavity (69), one end of the second hinged rod (62) is hinged with one end of a third hinged rod (63), the other end of the second hinged rod (62) is provided with a second cavity (68), the middle position of the second hinged rod (62) is rotatably connected with a third hinged rod (67), the two ends of the third hinged rod (67) are fixedly connected with the hollow front and rear side walls inside the base (2), one end of the connecting rod (66) is slidably connected with the first cavity (69), and the other end of the connecting rod (66) is slidably connected with the second cavity (68), the other end of third hinge pole (63) is articulated with the middle part of chucking pole (65), the right-hand member and second pivot (60) of chucking pole (65) rotate to be connected, the left end and the bottom joint of location locking mechanism (7) of chucking pole (65), lateral wall fixed connection around second pivot (60) and the inside hollow of base (2).

3. The frost crack prevention device for a winter water meter as claimed in claim 2, wherein: the positioning and locking mechanism (7) comprises a locking rod (71), a pulling rod (72), a third spring (73) and a clamping rod groove (76), the base (2) is close to the upper end edge position and is sequentially provided with a pulling rod groove (74) and a locking rod groove (75) from top to bottom, the clamping rod groove (76) is communicated with the locking rod groove (75), the bottom of the locking rod (71) is in sliding connection with the locking rod groove (75), the bottom surface of the bottom of the locking rod (71) is provided with a clamping groove (70) corresponding to the clamping rod (65), one end of the third spring (73) is fixedly connected with one side of the locking rod groove (75), the other end of the third spring (73) is fixedly connected with one side of the bottom of the locking rod (71), the pulling rod (72) is in sliding connection with the pulling rod groove (74), the bottom end of the pulling rod (72) is fixedly connected with the position of the locking rod (71) close to the bottom, the top of the locking rod (71) corresponds to the locking groove (11) and the locking hole (12).

4. The frost crack prevention device for a winter water meter as claimed in claim 1, wherein: still include bracing piece (14), the bottom of placing box (1) evenly is equipped with slip chamber (13), the upper end and the slip chamber (13) sliding connection of bracing piece (14), the lower extreme of bracing piece (14) and the last fixed surface of base (2) are connected, and the cover has first spring (15) on bracing piece (14), the one end of first spring (15) and the bottom fixed connection of placing box (1), the other end of first spring (15) and the last fixed surface of base (2) are connected.

5. The frost crack prevention device for a winter water meter as claimed in claim 1, wherein: and a heat-insulating layer is arranged in the rectangular placing room (8).