Self-locking clamp device for water meter detection and use method of self-locking clamp device

Abstract

The invention relates to a self-locking clamp device for water meter detection and a using method thereof, and belongs to the technical field of water meter detection. The clamp assembly is placed on the conveying line belt, linearly moves along with the conveying line belt and is used for positioning the water meter and achieving clamping and self-locking. The clamping jaw assembly is installed below the robot and used for clamping the water meter and is matched with the clamp assembly to achieve clamping and unlocking of the water meter. The clamp assembly comprises a positioning bottom plate, a V-shaped block moving mechanism, a positioning block and a water meter bottom support mechanism, the V-shaped block moving mechanism and the positioning block achieve clamping and self-locking through an elastic buckle and a clamping groove structure, and the water meter bottom support mechanism converts the gravity of a water meter into clamping force through a wedge-shaped mechanism. Self-adaptive clamping of the water meter is achieved through the gravity of the water meter, the stability of the clamping force is guaranteed through a self-locking mechanism, unlocking of the clamping self-locking state of the water meter is achieved through a plug pin on the clamping jaw assembly, extra air cylinder or robot action is not needed, the detection efficiency is improved, and the equipment cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of water meter detection, and in particular to a self-locking clamp device for water meter detection and a use method thereof. Background Art

[0002] As a measuring instrument widely used in various industries, it is very important to calibrate water meters in accordance with relevant regulations before they are officially put into use. With the continuous improvement of the automation level of water meter production, manual water meter testing is gradually being replaced by automated equipment. In order to ensure the accuracy of the test, the automated testing line has high requirements for the certainty of the position and direction of the water meter, that is, the position and direction of the water meter cannot change during the test. Therefore, it is very important to ensure the continuous clamping ability of the water meter testing fixture.

[0003] At present, in the water meter automation production line, the positioning and clamping of the water meter is generally achieved by the cylinder, and the water meter detection line is no exception. This not only increases the equipment cost, but also reduces the detection efficiency to a certain extent. Patents CN111412966A and CN115781548A propose two different solutions. One relies on the Y-type push rod, the water meter clamping seat and the spring and other components to achieve the force provided by the spring to clamp the water meter to achieve stable transportation of the water meter on the assembly line, and the cylinder pushes the push rod to separate the clamping seat to remove the water meter; the other is to achieve the stable transportation of the water meter on the assembly line through the moving platform, the pipe section clamping sleeve and the spring and other components. When removing the water meter, the robot needs to open the pipe section clamping sleeve. Although the above two solutions can realize the automatic clamping of the water meter on the assembly line, the clamping or removing of the water meter still requires the additional action of the cylinder or the robot; at the same time, the clamping force of the water meter comes from the spring. After repeated use, the spring is difficult to maintain a stable clamping force on the water meter due to metal fatigue. Therefore, there is an urgent need to design a detection tooling that can provide continuous and stable clamping force and can remove the water meter without relying on additional actions made by cylinders or robots. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide a self-locking clamp device for water meter detection and a method of using the same. The self-locking state of the water meter is achieved by utilizing the structure of an elastic buckle and a slot; the water meter's own gravity is used as the source of the tooling clamping force to achieve adaptive clamping of the water meter without damaging the water meter surface.

[0005] To achieve the above-mentioned object, the first aspect of the present invention provides a self-locking fixture device for water meter detection, comprising:

[0006] The clamp assembly is placed on the conveyor belt and moves linearly with the conveyor belt, and is used to position the water meter and clamp it for self-locking;

[0007] A clamping claw assembly is installed under the robot, used to clamp the water meter and cooperate with the clamp assembly to achieve self-locking of the water meter, and the clamping claw assembly includes a latch;

[0008] The clamp assembly includes a positioning base plate, a V-block movable mechanism, a positioning block and a water meter supporting mechanism; the V-block movable mechanism is arranged above the positioning base plate, the positioning block is fixed on the positioning base plate, and the water meter supporting mechanism is arranged between the V-block movable mechanism and the positioning block, and is used to work with the V-block movable mechanism and convert the gravity of the water meter into a clamping force to clamp the water meter to form a clamping state for the water meter; the positioning block is provided with card slots on both sides, and the pin cooperates with the card slots and the V-block movable mechanism to realize the unlocking of the water meter clamping self-locking state.

[0009] Furthermore, a self-locking fixture device for water meter detection, the V-block movable mechanism comprises:

[0010] A V-block guide rail fixed to the positioning base plate;

[0011] A V block slides on the V block guide rail, the side in contact with the water meter is a V-shaped surface adapted to the contact surface of the water meter, and guide grooves are symmetrically arranged on both sides of the bottom surface;

[0012] A fixing seat, fixed on the positioning base plate;

[0013] A compression spring, one end of which is connected to the fixing seat and the other end of which is connected to the V-block;

[0014] An elastic buckle, used to follow the movement of the V-block to snap into the slot on the positioning block, one end of which is fixedly connected to the side of the V-block, and the other end is provided with a hook adapted to the slot, and the upper surface of the hook is provided with an inclined surface adapted to the latch;

[0015] The latch is used to insert into the slots on both sides of the positioning block when taking out the water meter, so as to squeeze out the elastic buckles stuck in the slots, thereby unlocking the clamped self-locking state of the water meter.

[0016] Furthermore, the fixture assembly further comprises:

[0017] A standard pallet, placed on the conveyor belt, is used to fix the positioning base plate.

[0018] Furthermore, the V-block movable mechanism further comprises:

[0019] Guide rail stopper, used for sliding limit of V-block guide rail.

[0020] Furthermore, the water meter supporting mechanism further comprises:

[0021] A wedge guide rail mounted on the positioning base plate;

[0022] a wedge, sliding on the wedge guide rail;

[0023] A water meter base, the upper surface of which has a concave surface adapted to the bottom surface of the water meter, the lower surface has a sinking space, and both sides have wedge surfaces matched with the wedge block, the water meter base is used to support the water meter while moving downward and pressing the wedge block on both sides to make it slide away from the water meter, the wedge block has a wedge surface matched with the water meter base, and is used to form a wedge mechanism with the wedge surface of the water meter base;

[0024] A pulley support plate, mounted on the side of the wedge block;

[0025] The pulley is installed at the end of the pulley support plate. A bearing is installed inside the pulley and cooperates with the guide groove of the V block to realize the linkage between the V block movable mechanism and the water meter bottom supporting mechanism.

[0026] Furthermore, the side of the positioning block in contact with the water meter is an arc-shaped surface adapted to the contact surface of the water meter.

[0027] Furthermore, the clamping jaw assembly comprises:

[0028] Robot interface flange, used to connect the robot;

[0029] A cylinder flange connected to the robot interface flange via a flange support;

[0030] An open clamping cylinder, mounted on the cylinder flange, for completing the action of clamping the water meter;

[0031] A latch mounting block, on which a latch support plate is mounted, the latch support plate being used to mount the latch;

[0032] A clamping jaw is mounted on the open clamping cylinder to clamp the water meter.

[0033] In a second aspect, a method for using the self-locking clamp device for water meter detection according to the first aspect is provided, the method comprising the following steps:

[0034] Grasp the water meter by the robot on the gripper assembly;

[0035] Place the water meter on the water meter base of the water meter base support mechanism in the fixture assembly;

[0036] Under the gravity of the water meter, the water meter base moves downward, and the wedge mechanism causes the wedge to slide outward along the wedge guide rail;

[0037] The pulley moves along the guide groove at the bottom of the V block, causing the V block to overcome the tension of the compression spring and move closer to the water meter;

[0038] When the V block contacts the water meter, the V block and the positioning block work together to clamp the water meter, and the elastic buckle is inserted into the slot of the positioning block to achieve self-locking;

[0039] Insert the pin on the clamp assembly into the slot of the positioning block, squeeze out the elastic buckle, and release the self-locking state of the water meter;

[0040] The robot's gripper grips the water meter and lifts it up;

[0041] During the lifting process, the latch keeps the elastic buckle in a state of being out of the slot;

[0042] After lifting, the compression spring pulls the V block to reset, completing the water meter removal and placement process.

[0043] Compared with the prior art, the present invention has the following beneficial effects:

[0044] (1) The present invention realizes rapid positioning and stable clamping of the water meter through the coordinated work of the clamp assembly and the clamping jaw assembly. The clamp assembly utilizes its own V-block movable mechanism to cooperate with the positioning block and the water meter base support mechanism to realize the adaptive clamping and self-locking functions of the water meter. No additional cylinder or robot action is required, thereby simplifying the clamping and loosening operations during the water meter detection process and improving the efficiency of automated detection.

[0045] (2) The present invention realizes the effective conversion and utilization of the gravity of the water meter by providing a water meter base supporting mechanism. The water meter base supporting mechanism converts the gravity of the water meter into a clamping force through a wedge mechanism, so that the water meter can be stably clamped without the need for an additional power source.

[0046] (3) The present invention provides stable lateral support by matching the arc surface of the positioning block with the side surface of the water meter, and the V-block movable mechanism contacts the water meter through the V-shaped surface, thereby achieving tight clamping of the water meter.

[0047] (4) The elastic buckle automatically slides into the slot during the clamping process, achieving self-locking of the clamped state and ensuring the stability of the water meter during the detection process; at the same time, the cooperation between the pin on the clamp assembly and the elastic buckle can realize the rapid unlocking of the self-locking state of the water meter clamping. When the water meter needs to be removed, the robot clamp moves downward to grab the water meter. The pin on the robot clamp can be quickly inserted into the slot and squeeze out the elastic buckle to achieve unlocking of the clamped state, thereby improving the automation and efficiency of water meter detection. The water meter detection tooling can be removed without relying on the cylinder or additional actions of the robot.

[0048] In summary, the present invention realizes rapid positioning, stable clamping, adaptive adjustment and efficient automated operation during water meter detection through the cooperation of the above-mentioned components, reduces tooling costs, improves detection efficiency, and avoids damage to the water meter surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 It is a structural schematic diagram of the present invention;

[0050] Figure 2 It is a structural schematic diagram of the clamp assembly of the present invention;

[0051] Figure 3 It is a top cross-sectional view of the structure of the clamp assembly of the present invention before being placed into the water meter;

[0052] Figure 4 It is a top cross-sectional view of the structure of the clamp assembly of the present invention after being placed in a water meter;

[0053] Figure 5 It is a structural axonometric diagram of the clamp assembly of the present invention;

[0054] Figure 6 It is a structural axonometric diagram of the elastic buckle of the present invention;

[0055] Figure 7 It is a structural side sectional view of the clamp assembly of the present invention before being placed into a water meter;

[0056] Figure 8 It is a top cross-sectional view of the structure of the clamp assembly of the present invention after being placed in a water meter;

[0057] Fig. 9 It is a structural schematic diagram of the clamping jaw assembly of the present invention;

[0058] Fig.10 This is a schematic diagram of the clamping claw assembly pin of the present invention being inserted into the clamp assembly to fix the magnetic steel positioning block;

[0059] Fig.11 This is a working state diagram of the self-locking tooling and fixture for water meter detection according to the present invention;

[0060] Fig.12 It is the working state diagram of the present invention;

[0061] Explanation of reference numbers: 1. Fixture assembly; 11. Standard pallet; 12. Positioning base plate; 13. Positioning block; 131. Slot; 14. V-block movable mechanism; 141. V-block; 142. Guide rail block; 143. V-block guide rail; 144. Fixed seat; 145. Compression spring; 146. Elastic buckle; 15. Water meter base support mechanism; 151. Wedge block guide rail; 152. Water meter base; 153. Wedge block; 154. Pulley; 155. Pulley support plate; 2. Clamp assembly; 21. Robot interface flange; 22. Flange support; 23. Cylinder flange; 24. Open clamp cylinder; 25. Pin mounting block; 26. Clamp; 27. Pin support plate; 28. Pin; 3. Robot; 4. Water meter. DETAILED DESCRIPTION

[0062] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0063] In the description of the present invention, it should be understood that the terms "center", "axial", "lateral", "upper", "lower", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0064] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0065] The present invention provides a self-locking fixture device for water meter detection, comprising:

[0066] The clamp assembly 1 is placed on the conveyor belt and moves linearly with the conveyor belt, and is used to position the water meter 4 and clamp it for self-locking;

[0067] The clamping jaw assembly 2 is installed under the robot 3 and is used to clamp the water meter 4 and cooperate with the clamping jaw assembly 1 to achieve clamping and unlocking of the water meter 4. The clamping jaw assembly 2 includes a latch 28;

[0068] The clamp assembly 1 includes a positioning base plate 12, a positioning block 13, a V-block movable mechanism 14 and a water meter supporting mechanism 15; the V-block movable mechanism 14 is arranged above the positioning base plate 12, the positioning block 13 is fixed on the positioning base plate 12, and the water meter supporting mechanism 15 is arranged between the V-block movable mechanism 14 and the positioning block 13, and is used to work with the V-block movable mechanism 14 and convert the gravity of the water meter 4 into a clamping force for clamping the water meter 4 to form a clamping state for the water meter 4; the positioning block 13 is provided with a card slot 131 on both sides, and the pin 28 cooperates with the card slot 131 and the V-block movable mechanism 14 to realize the unlocking of the clamped self-locking state of the water meter 4.

[0069] Furthermore, the V-block movable mechanism 14 comprises:

[0070] V-block guide rail 143, fixed on the positioning base plate 12;

[0071] The V block 141 slides on the V block guide rail 143, and the side in contact with the water meter 4 is a V-shaped surface adapted to the contact surface of the water meter 4, and guide grooves 1411 are symmetrically arranged on both sides of the bottom surface;

[0072] A fixing seat 144, fixed on the positioning base plate 12;

[0073] The compression spring 145 has one end connected to the fixing seat 144 and the other end connected to the V-block 141 .

[0074] The elastic buckle 146 is used to move with the V-block 141 to snap into the slot 131 on the positioning block 13. One end of the elastic buckle 146 is fixedly connected to the side of the V-block 141, and the other end is provided with a hook adapted to the slot 131. The upper surface of the hook is provided with an inclined surface adapted to the latch 28.

[0075] The latch 28 is used to be inserted into the slots 131 on both sides of the positioning block 13 when the water meter 4 is taken out, so as to squeeze out the elastic buckle 146 stuck in the slot 131, thereby unlocking the clamped self-locking state of the water meter 4.

[0076] Furthermore, the fixture assembly 1 further comprises:

[0077] The standard pallet 11 is placed on the conveyor belt and is used to fix and position the bottom plate 12.

[0078] Specifically, the V-block movable mechanism 14 also includes:

[0079] The guide rail stopper 142 is used for sliding limit of the V-block guide rail.

[0080] Furthermore, the water meter supporting mechanism 15 also includes:

[0081] A wedge guide rail 151, which is mounted on the positioning base plate 12;

[0082] Wedge block 153 slides on wedge block guide rail 151;

[0083] The water meter base 152 has a concave surface on its upper surface adapted to the bottom surface of the water meter 4, a sinking space is reserved on its lower surface, and wedge surfaces on both sides are provided to match the wedge block 153. The water meter base 152 is used to support the water meter 4 while moving downward and pressing the wedge block 153 on both sides to make it slide away from the water meter 4. The wedge block 153 has a wedge surface that matches the water meter base 152, and is used to form a wedge mechanism with the wedge surface of the water meter base 152;

[0084] A pulley support plate 155 is mounted on the side of the wedge block 153;

[0085] The pulley 154 is installed at the end of the pulley support plate 155. A bearing is installed inside the pulley 154, which cooperates with the guide groove 1411 of the V block 141 to realize the linkage between the V block movable mechanism 14 and the water meter bottom supporting mechanism 15.

[0086] Specifically, the side of the positioning block 13 that contacts the water meter 4 is an arc-shaped surface that matches the contact surface of the water meter 4 .

[0087] Further, the clamping jaw assembly 2 comprises:

[0088] A robot interface flange 21, used for connecting to the robot 3;

[0089] The cylinder flange 23 is connected to the robot interface flange 21 through the flange support 22;

[0090] The open clamping cylinder 24 is installed on the cylinder flange 23 and is used to complete the action of clamping the water meter 4;

[0091] A latch mounting block 25 on which a latch support plate 27 is mounted, and the latch support plate 27 is used to mount a latch 28;

[0092] The clamping jaw 26 is mounted on the open clamping cylinder 24 to clamp the water meter 4.

[0093] As an embodiment, the present invention provides a self-locking fixture device for water meter detection, such as Figure 1 As shown, it includes: a clamp assembly 1, a clamping claw assembly 2, a robot 3 and a water meter 4.

[0094] like Figure 2-Figure 8As shown, the fixture assembly 1 includes a standard tray 11, a positioning base plate 12, a positioning block 13, a V-block movable mechanism 14, and a water meter bottom supporting mechanism 15. The standard tray 11 is used to install the positioning base plate 12; the positioning base plate is used to install the positioning block 13, the V-block movable mechanism 14, and the water meter bottom supporting mechanism 15.

[0095] The positioning block 13 supports the water meter 4 from the side of the water meter by means of the arc-shaped profiling surface, so as to limit the side of the water meter 4 in one direction. Meanwhile, the positioning block 13 is provided with clamping grooves 131 on both sides.

[0096] The V-block movable mechanism 14 includes a V-block 141, a V-block guide rail 143, a guide rail stopper 142, a compression spring 145, and a fixing seat 144. The guide rail stopper 142 is installed on the positioning base plate 12 by screws, and is used to limit the V-block guide rail 143; one end of the V-block guide rail 143 is fixed to the positioning base plate 12 by threaded connection, and the other end is fixed to the V-block 141 by screws, so that the V-block 141 can slide on the positioning base plate 12; Figure 6 As shown, elastic buckles 146 are installed on both sides of the V-block 141 by screws. The elastic buckles 146 have inclined surfaces at a certain angle in the length direction and the thickness direction. The V-block 141 is also fixed to one end of the compression spring 145 by screws; the other end of the compression spring 145 is installed on the fixing seat 144 by screws; the fixing seat 144 is fixed to the positioning base plate 12 by screws, so that the V-block 141 can be pulled to a position away from the water meter 4 by the compression spring 145, so as to make room for the water meter.

[0097] The water meter support mechanism 15 includes a water meter base 152, a wedge guide rail 151, a wedge 153, a pulley support plate 155 and a pulley 154. The water meter base 152 is used to support the water meter from the bottom surface, and its two symmetrical inclined surfaces cooperate with the wedge surfaces of the two wedges 153 to form a wedge-shaped mechanism; the wedge 153 is fixed to the corresponding wedge guide rail 151 by screws; the other end of the wedge guide rail 151 is fixed to the positioning base plate 12; one end of the pulley support plate 155 is fixed to the wedge 153 by screws, and the other end is used to install the pulley 154, so that the pulley can move with the wedge 153; there are two pulleys 154, which cooperate with the two guide grooves on the lower surface of the V block 141.

[0098] like Fig. 9As shown, the clamp assembly 2 includes a robot interface flange 21, a flange support 22, a cylinder flange 23, an open clamp cylinder 24, a latch mounting block 25, a clamp 26, a latch support plate 27, and a latch 28. The robot interface flange 21 is used to connect with the robot 3; the cylinder flange 23 is used to install the open clamp cylinder 24; the flange support 22 is used to connect the robot interface flange 21 and the cylinder flange 23; the open clamp cylinder 24 is used to complete the clamping action; the clamp 26 is installed on the open clamp of the open clamp cylinder 24, and is used to clamp the water meter 4; the latch mounting block 25 is used to install the latch support plate 27; the latch support plate 27 is used to install the latch 28; the latch 28 is used to insert into the slots 131 on both sides of the positioning block to squeeze out the elastic buckle 146 that is inserted into the clamp, so as to release the self-locking state of the water meter clamping.

[0099] like Figure 11-Figure 12 As shown, when the present invention is working, the robot 3 grabs the water meter 4 through the gripper assembly 2 and places it on the water meter base 152. The water meter base 152 will move downward under the gravity of the water meter 4, and the wedge blocks 153 at both ends of the water meter 4 will slide in the direction away from the water meter 4 through the wedge mechanism, that is, the pulley 154 moves in the direction away from the water meter 4. Under the guidance of the guide groove 1411 in the V block 141, the V block 141 will overcome the pulling force of the compression spring 145 and approach the water meter 4. When the V block 141 is close to the water meter 4, it will be limited by the positioning block 13, and the V block 141 will clamp the water meter 4 together with the positioning block 13. At the same time, the elastic buckles 146 on both sides of the V block 141 will be stuck in the slots 131 of the positioning block 13. In the process, the self-locking of the clamping is finally achieved; when the water meter 4 needs to be removed, the robot 3 clamping jaws 26 move downward to grab the water meter 4, and the pin 28 on the robot 3 clamping jaws 26 is inserted into the slot 131 on the positioning block 13. Since the elastic buckle 146 has a slope at a certain angle in the thickness direction, the elastic buckle 146 will be squeezed out of the slot 131 by the pin 28. At this time, the clamping self-locking state of the water meter 4 is released, and the robot 3 clamps the water meter 4 and lifts it up. During the lifting process, due to the long length of the pin 28, the elastic buckle 146 is always in a position where it is squeezed out of the slot 131. After lifting, the gravity providing the clamping force disappears, and the compression spring 145 tightens the V-block 141 to keep it away from the water meter 4 until the water meter 4 is taken out by the robot 3.

[0100] As an embodiment, a method for using a self-locking clamp device for water meter detection is provided, comprising the following steps:

[0101] Grasp the water meter 4 by the robot 3 on the gripper assembly 2;

[0102] Place the water meter 4 on the water meter base 152 of the water meter base support mechanism 15 in the fixture assembly 1;

[0103] Under the gravity of the water meter 4, the water meter base 152 moves downward, and the wedge block 153 slides outward along the wedge block guide rail 151 through the wedge mechanism;

[0104] The pulley 154 moves along the guide groove 1411 at the bottom of the V-block 141, causing the V-block 141 to overcome the pulling force of the compression spring 145 and move closer to the water meter 4;

[0105] When the V-block 141 contacts the water meter 4, the V-block 141 and the positioning block 13 work together to clamp the water meter 4, and the elastic buckle 146 is snapped into the slot 131 of the positioning block 13 to achieve self-locking;

[0106] Insert the latch 28 on the clamp assembly 2 into the slot 131 of the positioning block 13 to squeeze out the elastic buckle 146 to release the self-locking state of the water meter 4;

[0107] The water meter 4 is clamped and lifted by the gripper 26 of the robot 3;

[0108] During the lifting process, the latch 28 keeps the elastic buckle 146 in a state of being out of the slot 131;

[0109] After lifting, the compression spring 145 pulls the V block 141 to return to its original position, completing the process of taking and placing the water meter 4 .

[0110] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0111] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A self-locking fixture device for water meter detection, characterized in that: include: The clamp assembly (1) is placed on the conveyor belt and moves linearly with the conveyor belt, and is used to position the water meter (4) and clamp it for self-locking; A clamping jaw assembly (2) is installed below the robot (3) and is used to clamp the water meter (4) and cooperate with the clamp assembly (1) to achieve clamping and unlocking of the water meter (4). The clamping jaw assembly (2) includes a latch (28); The clamp assembly (1) comprises a positioning base plate (12), a positioning block (13), a V-block movable mechanism (14) and a water meter supporting mechanism (15), wherein the V-block movable mechanism (14) is arranged above the positioning base plate (12), the positioning block (13) is fixed on the positioning base plate (12), and the water meter supporting mechanism (15) is arranged between the V-block movable mechanism (14) and the positioning block (13), and is used to work in conjunction with the V-block movable mechanism (14) and convert the gravity of the water meter (4) into a clamping force for clamping the water meter (4) to form a clamping state for the water meter (4); the positioning block (13) is provided with a clamping groove (131) on both sides, and the latch (28) cooperates with the clamping groove (131) and the V-block movable mechanism (14) to realize unlocking of the clamped self-locking state of the water meter (4).

2. A self-locking fixture device for water meter detection, characterized in that: The V-block movable mechanism (14) comprises: A V-block guide rail (143) fixed on the positioning base plate (12); A V-block (141) slides on the V-block guide rail (143), the side in contact with the water meter (4) being a V-shaped surface adapted to the contact surface of the water meter (4), and guide grooves (1411) are symmetrically arranged on both sides of the bottom surface; A fixing seat (144) fixed on the positioning base plate (12); A compression spring (145), one end of which is connected to the fixing seat (144) and the other end of which is connected to the V-block (141); An elastic buckle (146) is used to move with the V-block (141) to snap into the slot (131) on the positioning block (13), one end of which is fixedly connected to the side of the V-block (141), and the other end is provided with a hook adapted to the slot (131), and the upper surface of the hook is provided with an inclined surface adapted to the latch (28); The latch (28) is used to insert into the slots (131) on both sides of the positioning block (13) when taking out the water meter (4), so as to squeeze out the elastic buckle (146) stuck in the slot (131), thereby unlocking the water meter (4) from a clamped self-locking state.

3. The self-locking fixture device for water meter detection according to claim 2 is characterized in that: The clamp assembly (1) further comprises: A standard pallet (11) is placed on the conveyor belt and is used to fix the positioning base plate (12).

4. The self-locking fixture device for water meter detection according to claim 3 is characterized in that: The V-block movable mechanism (14) further comprises: The guide rail stopper (142) is used for sliding limit of the V-block guide rail.

5. The self-locking fixture device for water meter detection according to claim 4, characterized in that: The water meter supporting mechanism (15) further comprises: A wedge guide rail (151) mounted on the positioning base plate (12); A wedge (153) sliding on the wedge guide rail (151); The water meter base (152) has a concave surface on its upper surface adapted to the bottom surface of the water meter (4), a sinking space is reserved on its lower surface, and wedge surfaces on both sides are adapted to match the wedge block (153). The water meter base (152) is used to support the water meter (4) while moving downward and pressing the wedge block (153) on both sides to make it slide in a direction away from the water meter (4). The wedge block (153) has a wedge surface adapted to match the water meter base (152) and is used to form a wedge mechanism with the wedge surface of the water meter base (152); A pulley support plate (155) mounted on a side of the wedge block (153); The pulley (154) is installed at the end of the pulley support plate (155). A bearing is installed inside the pulley (154) and cooperates with the guide groove (1411) of the V block (141) to realize the linkage between the V block movable mechanism (14) and the water meter bottom support mechanism (15).

6. The self-locking fixture device for water meter detection according to claim 5, characterized in that: The side of the positioning block (13) that contacts the water meter (4) is an arc-shaped surface that matches the contact surface of the water meter (4).

7. The self-locking fixture device for water meter detection according to claim 6, characterized in that: The clamping jaw assembly (2) comprises: A robot interface flange (21) for connecting to the robot (3); A cylinder flange (23) connected to the robot interface flange (21) via a flange support (22); An open clamping cylinder (24) is installed on the cylinder flange (23) and is used to complete the action of clamping the water meter (4); A latch mounting block (25) on which a latch support plate (27) is mounted, wherein the latch support plate (27) is used to mount the latch (28); A clamping claw (26) is mounted on the open clamping cylinder (24) to clamp the water meter (4).

8. A method for using the self-locking clamp device for water meter detection according to claim 7, characterized in that: The following steps are involved: Grasping the water meter (4) by means of the robot (3) on the gripper assembly (2); Placing the water meter (4) on the water meter base (152) of the water meter base supporting mechanism (15) in the fixture assembly (1); Under the action of the gravity of the water meter (4), the water meter base (152) moves downward, and the wedge block (153) slides outward along the wedge block guide rail (151) through the wedge-shaped mechanism; The pulley (154) moves along the guide groove (1411) at the bottom of the V-block (141), causing the V-block (141) to overcome the pulling force of the compression spring (145) and move closer to the water meter (4); When the V-block (141) contacts the water meter (4), the V-block (141) and the positioning block (13) work together to clamp the water meter (4), and the elastic buckle (146) is snapped into the slot (131) of the positioning block (13) to achieve self-locking; The latch (28) on the clamping jaw assembly (2) is inserted into the clamping slot (131) of the positioning block (13), and the elastic buckle (146) is squeezed out to release the self-locking state of the water meter (4); Clamping the water meter (4) with the clamping claw (26) of the robot (3) and lifting it; During the lifting process, the latch (28) keeps the elastic buckle (146) in a state of being out of the slot (131); After lifting, the compression spring (145) pulls the V-block (141) to reset, completing the process of taking and placing the water meter (4).

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