Flow measuring device

Abstract

The utility model relates to the field of flow measurement, in particular to a flow measurement device which comprises a shell, an upper cover and a locking structure. The upper cover is connected with the shell through a locking structure; the locking structure comprises a locking column and a locking cam; the locking column is in sliding connection with the upper cover; the locking cam is rotationally connected with the shell; the locking column comprises a locking column body and a locking protrusion arranged at the bottom end of the locking column body. The locking cam comprises a cam body, a first locking plate and a second locking plate, wherein the first locking plate and the second locking plate are sequentially connected and arranged on the inner side of the cam body. A first notch and a first limiting groove which are communicated with each other are formed in the first locking plate; the second locking plate is provided with a second notch and a second limiting groove which are communicated with each other. According to the utility model, the upper cover is connected with the shell through the locking structure, and the locking and unlocking actions of the locking structure are realized by rotating the locking cam, so that the risk that the upper cover is opened due to mistaken touch is reduced, and the stability and the reliability of connection between the upper cover and the shell are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of flow measurement, in particular to a flow measurement device. Background Art

[0002] The flow measuring device usually includes a shell and an upper cover connected to the top of the shell; usually one end of the upper cover is connected to the shell rotating structure through a pin, and the other end of the upper cover is detachably connected to the shell, so that the upper cover and the shell can be disassembled through the detachable end for maintenance and other operations.

[0003] Currently, the upper cover and the shell are mostly connected detachably by pressing a buckle; this connection method is easy to operate, but it is easy to cause the upper cover and the shell to separate due to accidental touch during use, affecting the smooth progress of the measurement process. Utility Model Content

[0004] In order to solve the problem in the prior art that the upper cover and the shell are easily separated due to accidental touch in the flow measuring device, the utility model provides a flow measuring device, which locks the upper cover and the shell through a locking column and a locking cam, thereby improving the stability of the connection between the upper cover and the shell, and solving the problem in the prior art that the upper cover is easily opened due to accidental touch.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A flow measurement device comprises a housing, an upper cover and a locking structure; the upper cover is connected to the housing through the locking structure; wherein,

[0007] The locking structure comprises a locking column and a locking cam;

[0008] The locking column is slidably connected to the upper cover;

[0009] The locking cam is rotatably connected to the housing;

[0010] The locking column comprises a locking column body and a locking protrusion arranged at the bottom end of the locking column body;

[0011] The locking cam comprises a cam body, and a first locking plate and a second locking plate which are sequentially connected and arranged inside the cam body;

[0012] The first locking plate is provided with a first notch and a first limiting groove communicating with each other;

[0013] The second locking plate is provided with a second notch and a second limiting groove communicating with each other;

[0014] The first notch, the first limiting groove, the second notch and the second limiting groove constitute a locking groove suitable for cooperating with the locking protrusion to lock the locking column.

[0015] Optionally, the second limiting groove is a through hole structure.

[0016] Optionally, the first limiting groove and the second limiting groove are both arc-shaped structures.

[0017] Optionally, a positioning protrusion suitable for abutting against the locking column is provided between the first locking plate and the second locking plate.

[0018] Optionally, a rotary switch is provided on the outer side of the cam body.

[0019] Optionally, the locking column includes a limiting protrusion arranged at the top end of the locking column body; and the upper cover is provided with a first through hole suitable for the locking column body to pass through.

[0020] Optionally, the first through hole is a countersunk hole.

[0021] Optionally, the inner diameter of the small end of the first through hole is smaller than the outer diameter of the locking protrusion.

[0022] Optionally, a second through hole suitable for the locking column to pass through is provided on the housing; and an inner diameter of the second through hole is larger than an outer diameter of the locking protrusion.

[0023] Optionally, a limiting structure matched with the locking structure is arranged in the shell; a limiting column is arranged on the limiting structure, and a limiting ring groove matched with the limiting column is arranged on the cam body.

[0024] The beneficial effects of the utility model are:

[0025] The flow measuring device provided by the utility model connects the upper cover to the shell body through a locking structure. Since the locking and opening actions of the locking structure need to be realized by rotating the locking cam, the risk of the upper cover opening due to accidental touch is reduced, and the stability and reliability of the connection between the upper cover and the shell body are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0027] Figure 1 It is a simplified structural diagram of the flow measurement device in the utility model;

[0028] Figure 2 It is an exploded diagram of the flow measurement device in the utility model;

[0029] Figure 3It is a schematic assembly diagram of the locking structure in the utility model;

[0030] Figure 4 It is a simplified structure of the locking cam in the utility model. Figure 1 ;

[0031] Figure 5 It is a simplified structure of the locking cam in the utility model. Figure 2 ;

[0032] Figure 6 It is a simplified structure of the locking cam in the utility model. Figure 3 ;

[0033] Figure 7 It is a simplified structure of the locking cam in the utility model. Figure 4 .

[0034] In the figure: 1-shell; 11-second through hole; 2-upper cover; 21-first through hole; 3-locking structure; 31-locking column; 311-locking column body; 312-locking protrusion; 313-limiting protrusion; 32-locking cam; 321-cam body; 3211-rotating switch; 3212-limiting ring groove; 322-first locking plate; 3221-first notch; 3222-first limiting groove; 323-second locking plate; 3231-second notch; 3232-second limiting groove; 324-positioning protrusion; 4-limiting structure; 41-limiting column. DETAILED DESCRIPTION

[0035] The present utility model is now further described in detail. The embodiments described below are exemplary and intended to be used to explain the present utility model, but cannot be understood as limiting the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present utility model.

[0036] In the description of the present utility model, it should be understood that the terms "first" and "second" are only used to simplify the description, and cannot be understood as indicating or implying relative importance, or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0037] In the present utility model, unless otherwise clearly stipulated and limited, a first feature being "above" or "below" the first feature may include that the first feature is in direct contact with the second feature, or may include that the first feature and the second feature are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0038] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0039] In order to solve the problem that the upper cover and the housing are easily separated due to accidental touch in the flow measurement device in the prior art, the utility model provides a flow measurement device, see Figure 1-Figure 3 As shown, the flow measuring device includes a housing 1, an upper cover 2 and a locking structure 3; the upper cover 2 is connected to the housing 1 through the locking structure 3, specifically, one end of the upper cover 2 is rotatably connected to the housing 1 through a pin, and the other end of the upper cover 2 is connected to the housing 1 through the locking structure 3; wherein the locking structure 3 includes a locking column 31 and a locking cam 32; the locking column 31 is slidably connected to the upper cover 2; the locking cam 32 is rotatably connected to the housing 1; the locking column 31 includes a columnar locking column body 311, and a locking protrusion 312 arranged at the bottom end of the locking column body 311; the bottom end in this article specifically refers to an end pointing to one side of the housing after the upper cover 2 is connected to the housing 1; the locking cam 32 includes a cam body 321 , and a first locking plate 322 and a second locking plate 323 which are connected in sequence and arranged on the inner side of the cam body 321, and preferably the first locking plate 322 and the second locking plate 323 are arranged in parallel; in order to realize the connection between the locking column 31 and the locking cam 32, the first locking plate 322 in the utility model is provided with a first notch 3221 and a first limiting groove 3222 which are in communication with each other; at the same time, the second locking plate 323 is provided with a second notch 3231 and a second limiting groove 3232 which are in communication with each other; the first notch 3221, the first limiting groove 3222, the second notch 3231 and the second limiting groove 3232 constitute a locking groove which is suitable for cooperating with the locking protrusion 312 to realize locking of the locking column 31.

[0040] Specifically, the gap between the first notch 3221 and the second notch 3231 constitutes a space that can accommodate the locking protrusion 312, and the first limiting groove 3222 and the second limiting groove 3232 together constitute a space for limiting the locking protrusion 312; in the process of locking the upper cover 2 and the shell 1, the upper cover 2 is first placed on the shell 1 by rotating one end of the pin shaft, and then the locking column 31 passes through the upper cover 2, so that the locking protrusion 312 enters between the first notch 3221 and the second notch 3231. The locking cam 32 is then rotated to make the locking protrusion 312 enter the first limiting groove 3222 and the second limiting groove 3232, and the movement of the locking column 31 is limited by the first limiting groove 3222 and the second limiting groove 3232, thereby locking the upper cover 2 and the shell 1; when the upper cover 2 needs to be separated from the shell 1, the locking cam 32 is first rotated in the opposite direction to make the locking protrusion 312 located between the first notch 3221 and the second notch 3231, and then the locking column 31 is pulled up.

[0041] The flow measuring device provided by the utility model connects the upper cover 2 to the shell 1 through the locking structure 3. Since the locking and opening actions of the locking structure 3 need to be realized by rotating the locking cam 32, the risk of the upper cover 2 opening due to accidental touch is reduced, and the stability and reliability of the connection between the upper cover 2 and the shell 1 are improved.

[0042] The second limiting groove 3232 may be a groove-shaped structure; in order to simplify the structure, the utility model preferably adopts a through-hole structure as the second limiting groove 3232 .

[0043] Further, to reduce the difficulty of locking, see Figure 4-Figure 7 As shown, in the present invention, the first limiting groove 3222 and the second limiting groove 3232 are preferably arc-shaped structures.

[0044] In order to improve the stability of the locking structure, the utility model preferably provides a positioning protrusion 324 suitable for abutting against the locking column 31 between the first locking plate 322 and the second locking plate 323, so that during the locking process, the locking cam 32 can be rotated until the positioning protrusion 324 abuts against the locking column 31 to stop the rotation. On the one hand, the abutment between the positioning protrusion 324 and the locking column 31 can avoid the displacement of the locking column 31 to improve the stability of the locking structure. On the other hand, it helps to limit the locking position through the positioning protrusion 324 to improve the accuracy of the operation.

[0045] For ease of operation, the utility model preferably provides a rotary switch 3211 on the outer side of the cam body 321, i.e., the side away from the housing 1, so that the cam 32 can be locked and rotated in reverse through the rotary switch 321; the rotary switch 3211 can be a protruding structure protruding from the outer side of the cam body 321, or a groove structure provided on the outer side of the cam body 321, so that a rotation operation can be performed through a corresponding tool; in order to improve the aesthetics of the flow measuring device, the utility model preferably provides the rotary switch 321 as a groove structure, and further preferably provides the rotary switch 321 as a cross-shaped groove, so that a cross screwdriver can be inserted into the rotary switch 321 for rotation operation.

[0046] Furthermore, the utility model preferably comprises a locking column 31 including a limiting protrusion 313 arranged at the top end of the locking column body 311; the upper cover 2 is provided with a first through hole 21 suitable for the locking column body 311 to pass through; preferably, the outer diameter of the limiting protrusion 313 is larger than the inner diameter of the first through hole 21 to ensure that the upper cover 2 and the shell 1 are locked by the locking structure 3.

[0047] In order to further improve the aesthetics, the utility model preferably configures the first through hole 21 as a countersunk hole, that is, the longitudinal section of the first through hole 21 is a stepped structure, and the first through hole 21 is composed of an upper through hole with a larger aperture and a lower through hole with a smaller aperture; wherein the inner diameter of the upper through hole with a larger aperture in the first through hole 21 is adapted to the outer diameter of the limiting protrusion 313 to ensure that the limiting protrusion 313 is located in the upper through hole after locking is completed, thereby keeping the upper cover 2 flat.

[0048] Furthermore, in order to prevent the locking column 31 from falling off, the utility model preferably sets the inner diameter of the small end of the first through hole 21 , that is, the inner diameter of the lower through hole, to be smaller than the outer diameter of the locking protrusion 312 .

[0049] To ensure the successful completion of the locking action, the utility model preferably provides a second through hole 11 on the housing 1 for the locking column 31 to pass through; the inner diameter of the second through hole 11 is greater than the outer diameter of the locking protrusion 312 .

[0050] Specifically, a groove structure adapted to the locking cam 32 is provided in the shell 1 for accommodating the locking cam 32; at the same time, a second through hole 11 communicated with the groove structure is also provided on the shell 1, and the second through hole 11 is adapted to the locking column 31 so that the locking column 31 is connected to the locking cam 32 through the second through hole 11; to ensure that the locking column 31 passes through the second through hole 11 to be connected to the locking cam 32, the utility model preferably has an inner diameter of the second through hole 11 that is larger than an outer diameter of the locking protrusion 312.

[0051] In order to further improve the stability of the structure, the utility model preferably provides a limiting structure 4 that is compatible with the locking structure 3 in the shell 1; specifically, a limiting column 41 is provided on the limiting structure 4, and a limiting ring groove 3212 that is compatible with the limiting column 41 is provided on the cam body 321; since the limiting structure 4 is fixedly connected to the shell 1, the position of the limiting column 41 is fixed, so that the limiting column 41 cooperates with the limiting ring groove 3212, so that the locking cam 32 can only rotate but cannot move in the front and rear directions, thereby ensuring the stability of its structure.

[0052] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A flow measurement device, characterized in that: It comprises a housing (1), an upper cover (2) and a locking structure (3); the upper cover (2) is connected to the housing (1) via the locking structure (3); wherein: The locking structure (3) comprises a locking column (31) and a locking cam (32); The locking column (31) is slidably connected to the upper cover (2); The locking cam (32) is rotationally connected to the housing (1); The locking column (31) comprises a locking column body (311) and a locking protrusion (312) arranged at the bottom end of the locking column body (311); The locking cam (32) comprises a cam body (321), and a first locking plate (322) and a second locking plate (323) which are sequentially connected and arranged on the inner side of the cam body (321); The first locking plate (322) is provided with a first notch (3221) and a first limiting groove (3222) which are in communication with each other; The second locking plate (323) is provided with a second notch (3231) and a second limiting groove (3232) which are in communication with each other; The first notch (3221), the first limiting groove (3222), the second notch (3231) and the second limiting groove (3232) constitute a locking groove suitable for cooperating with the locking protrusion (312) to lock the locking column (31).

2. The flow measurement device according to claim 1, characterized in that: The second limiting groove (3232) is a through hole structure.

3. The flow measurement device according to claim 1, characterized in that: The first limiting groove (3222) and the second limiting groove (3232) are both arc-shaped structures.

4. The flow measurement device according to claim 1, characterized in that: A positioning protrusion (324) suitable for abutting against the locking column (31) is provided between the first locking plate (322) and the second locking plate (323).

5. The flow measurement device according to claim 1, characterized in that: A rotary switch (3211) is provided on the outer side of the cam body (321).

6. The flow measurement device according to claim 1, characterized in that: The locking column (31) comprises a limiting protrusion (313) arranged at the top end of the locking column body (311); and the upper cover (2) is provided with a first through hole (21) suitable for the locking column body (311) to pass through.

7. The flow measurement device according to claim 6, characterized in that: The first through hole (21) is a countersunk hole.

8. The flow measurement device according to claim 7, characterized in that: The inner diameter of the small end of the first through hole (21) is smaller than the outer diameter of the locking protrusion (312).

9. The flow measurement device according to claim 1, characterized in that: The housing (1) is provided with a second through hole (11) suitable for the locking column (31) to pass through; the inner diameter of the second through hole (11) is greater than the outer diameter of the locking protrusion (312).

10. The flow measurement device according to any one of claims 1 to 9, characterized in that: A limiting structure (4) matched with the locking structure (3) is arranged in the housing (1); a limiting column (41) is arranged on the limiting structure (4), and a limiting ring groove (3212) matched with the limiting column (41) is arranged on the cam body (321).

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