Flow measurement device

Abstract

Provided is a flow rate measuring device that improves the stability and reliability of the connection between the upper cover and the housing. 【Solution means】A flow rate measuring device comprising a housing 1, an upper cover 2, and a locking structure 3, wherein the upper cover is connected to the housing via the locking structure. The locking structure includes a locking pin 31 and a locking cam 32. The locking pin is slidably connected to the upper cover, and the locking cam is rotatably connected to the housing. The locking pin includes a locking pin body 311 and a locking protrusion 312 disposed at the lower end of the locking pin body. The locking cam includes a cam body 321, and a first locking plate 322 and a second locking plate 323 that are sequentially connected and disposed inside the cam body. Since the locking and unlocking operations of the locking structure are realized by the rotation of the locking cam, the risk of the upper cover opening due to accidental contact is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of flow measurement, and particularly to a flow measurement device.

Background Art

[0002] A flow measurement device usually includes a housing and an upper cover connected to the upper part of the housing. Usually, one end of the upper cover is rotatably connected to the housing via a pin shaft, and the other end of the upper cover is removably connected to the housing, so that the upper cover and the housing can be separated through the removable end for operations such as maintenance.

[0003] Currently, the upper cover and the housing are often removably connected by pressing a buckle. Such a connection method is easy to operate, but if accidentally touched during use, the upper cover and the housing are likely to separate, which affects the smooth progress of the measurement process.

Summary of the Invention

[0004] In order to solve the problem in the prior art that the upper cover and the housing of a flow measurement device are likely to come off due to accidental contact, the present invention provides a flow measurement device that locks the upper cover and the housing through a lock pin and a lock cam to improve the connection stability between the upper cover and the housing and solve the problem that the upper cover is likely to open due to accidental contact in the prior art.

[0005] In the present invention, the technical solution adopted to solve its technical problems is as follows. A flow measurement device comprising a housing, an upper cover, and a locking structure, wherein the upper cover is connected to the housing through the locking structure. Among them, the locking structure includes a lock pin and a lock cam. The lock pin is slidably connected to the upper cover. The lock cam is rotatably connected to the housing. The lock pin includes a lock pin body and a lock protrusion disposed at the lower end of the lock pin body. The lock cam includes a cam body, a first locking plate and a second locking plate which are sequentially connected and disposed inside the cam body. The first locking plate is provided with a first notch and a first limit slot that communicate with each other. The second locking plate is provided with a second notch and a second limit slot that communicate with each other. The first notch, the first limit slot, the second notch and the second limit slot cooperate with the lock protrusion to form a locking groove for locking the lock pin.

[0006] Preferably, the second limit slot has a through-hole structure.

[0007] Preferably, both the first limit slot and the second limit slot have an arc-shaped structure.

[0008] Preferably, a positioning protrusion (324) that abuts against the lock pin is provided between the first locking plate and the second locking plate.

[0009] Preferably, a rotary switch is provided outside the cam body.

[0010] Preferably, the lock pin includes a limit protrusion disposed at the top of the lock pin body, and the upper cover is provided with a first through-hole through which the lock pin body passes.

[0011] Preferably, the first through-hole is a countersunk hole.

[0012] Preferably, the inner diameter of the small end of the first through-hole is smaller than the outer diameter of the lock protrusion.

[0013] Preferably, the housing is provided with a second through-hole through which the lock pin passes, and the inner diameter of the second through-hole is larger than the outer diameter of the lock projection.

[0014] Preferably, the housing is provided with a limit structure that fits the lock structure, a limit pin is provided on the limit structure, and a limit ring slot that fits the limit pin is provided on the cam body.

[0015] The beneficial effects of the present invention are as follows. In the flow rate measuring device of the present invention, the upper cover and the housing are connected via a lock structure. Since the locking and unlocking operations of the lock structure are realized by the rotation of the lock cam, the risk of the upper cover opening due to accidental contact is reduced, and the stability and reliability of the connection between the upper cover and the housing are improved.

Brief Description of the Drawings

[0016] The present invention will be further described below with reference to the drawings and embodiments.

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Embodiments for Carrying Out the Invention

[0017] The present invention will be described in more detail below. The embodiments described below are exemplary and are for the purpose of explaining the present invention and should not be construed as limiting the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the technical scope of the present invention.

[0018] In the description of the present invention, terms such as "first" and "second" are merely for simplifying the description and should not be construed as indicating or suggesting relative importance or implying the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include the case where there is one or more such features. In the present invention, "a plurality" means two or more unless otherwise clearly defined.

[0019] In the present invention, unless specifically defined and limited otherwise, the fact that the first feature is "above" or "below" the second feature may include the case where the first feature is in direct contact with the second feature, or may include the case where the first feature and the second feature are not in direct contact and are in contact through other features therebetween. Further, the fact that the first feature is "above", "upward" or "upper surface" of the second feature means that the first feature is directly above or obliquely above the second feature, or simply means that the first feature has a higher horizontal height than the second feature. The fact that the first feature is "below", "downward" or "lower surface" of the second feature means that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower horizontal height than the second feature.

[0020] To more clearly understand the above objects, features and advantages of the present invention, the embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0021] In a prior art flow rate measuring device, in order to solve the problem that the upper cover is likely to come off from the housing due to accidental contact, the present invention provides a flow rate measuring device including a housing 1, an upper cover 2, and a locking structure 3 as shown in FIGS. 1 to 3. The upper cover 2 is connected to the housing 1 via the locking structure 3. Specifically, one end of the upper cover 2 is rotatably connected to the housing 1 via a pin shaft, and the other end of the upper cover 2 is connected to the housing 1 via the locking structure 3. Among them, the locking structure 3 includes a locking pin 31 and a locking cam 32. The locking pin 31 is slidably connected to the upper cover 2, and the locking cam 32 is rotatably connected to the housing 1. The locking pin 31 includes a pin-shaped locking pin body 311 and a locking protrusion 312 disposed at the lower end of the locking pin body 311. The lower end in this specification specifically refers to the end facing the housing side after the upper cover 2 and the housing 1 are connected. The locking cam 32 includes a cam body 321, a first locking plate 322 and a second locking plate 323 that are sequentially connected and disposed inside the cam body 321. Preferably, the first locking plate 322 and the second locking plate 323 are disposed in parallel. In order to realize the connection between the locking pin 31 and the locking cam 32, in the present invention, the first locking plate 322 is provided with a first notch 3221 and a first limit slot 3222 that communicate with each other. At the same time, the second locking plate 323 is provided with a second notch 3231 and a second limit slot 3232 that communicate with each other. The first notch 3221, the first limit slot 3222, the second notch 3231 and the second limit slot 3232 cooperate with the locking protrusion 312 to form a locking groove for locking the locking pin 31.

[0022] Specifically, the gap between the first notch 3221 and the second notch 3231 constitutes a space capable of accommodating the locking protrusion 312, and the first limit slot 3222 and the second limit slot 3232 together constitute a space for restricting the locking protrusion 312. In the process of locking the upper cover 2 and the housing 1, first, one end of the pin shaft rotates, so that the upper cover 2 is placed on the housing 1. Next, the locking pin 31 penetrates the upper cover 2, and the locking protrusion 312 enters the gap between the first notch 3221 and the second notch 3231. Then, the locking cam 32 rotates, and the locking protrusion 312 enters between the first limit slot 3222 and the second limit slot 3232, and the movement of the locking pin 31 is restricted by the first limit slot 3222 and the second limit slot 3232. Thereby, the locking of the upper cover 2 and the housing 1 is realized. When separating the upper cover 2 and the housing 1, first, the locking cam 32 is rotated in the opposite direction, the locking protrusion 312 is placed between the first notch 3221 and the second notch 3231, and then the locking pin 31 is pulled up.

[0023] The flow measuring device provided by the present invention connects the upper cover 2 and the housing 1 through the locking structure 3. Since the locking and unlocking operations of the locking structure 3 are realized by the rotation of the locking cam 32, the risk of the upper cover 2 opening due to accidental contact is reduced, and the stability and reliability of the connection between the upper cover 2 and the housing 1 are improved.

[0024] The second limit slot 3232 may have a groove-like structure. In order to simplify the structure, in the present invention, it is preferable that the second limit slot 3232 has a through-hole structure.

[0025] Furthermore, in order to reduce the difficulty of the locking operation, as shown in FIGS. 4 to 7, in the present invention, it is preferable that both the first limit slot 3222 and the second limit slot 3232 have an arc-shaped structure.

[0026] In order to improve the stability of the locking structure, in the present invention, it is preferable to provide a positioning protrusion 324 that abuts against the locking pin 31 between the first locking plate 322 and the second locking plate 323. Thereby, in the locking process, the locking cam 32 can rotate until the positioning protrusion 324 abuts against the locking pin 31 and stop rotating. On the other hand, the displacement of the locking pin 31 is avoided by the abutment between the positioning protrusion 324 and the locking pin 31, and the stability of the locking structure is improved. On the other hand, the positioning protrusion 324 facilitates the limitation of the locking position and can improve the operation accuracy.

[0027] For the convenience of operation, in the present invention, in order to facilitate the reverse rotation of the locking cam 32, it is preferable to provide a rotary switch 3211 on the outer side of the cam body 321, that is, on the side away from the housing 1. The rotary switch 3211 may have 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 as to perform a rotation operation through a corresponding tool. In order to improve the aesthetics of the flow measuring device, in the present invention, it is preferable that the rotary switch 3211 has a groove structure. Further, in order to facilitate the rotation operation by inserting a cross driver into the rotary switch 3211, it is preferable that the rotary switch 3211 has a cross groove.

[0028] Furthermore, in the present invention, preferably, the locking pin 31 is provided with a limit protrusion 313 disposed on the top of the locking pin body 311. The upper cover 2 is provided with a first through hole 21 through which the locking pin body 311 passes. Preferably, the outer diameter of the limit protrusion 313 is made larger than the inner diameter of the first through hole 21 so that the upper cover 2 and the housing 1 are securely locked by the locking structure 3.

[0029] In order to further improve the aesthetics, in the present invention, it is preferable that the first through hole 21 is a counterbore hole. That is, the longitudinal section of the first through hole 21 has a stepped structure and is composed of an upper through hole with a large hole diameter and a lower through hole with a small hole diameter. Here, since the inner diameter of the upper through hole with a large hole diameter in the first through hole 21 conforms to the outer diameter of the limit protrusion 313, after the locking is completed, the limit protrusion 313 is located in the upper through hole, thereby keeping the upper cover 2 flat.

[0030] Furthermore, in order to prevent the locking pin 31 from falling off, in the present invention, it is preferable that the inner diameter of the small end portion of the first through hole 21, that is, the inner diameter of the lower through hole, is set smaller than the outer diameter of the locking protrusion 312.

[0031] In order to ensure the completion of the locking operation, in the present invention, a second through hole 11 through which the locking pin 31 penetrates is provided in the housing 1, and it is preferable that the inner diameter of the second through hole 11 is larger than the outer diameter of the locking protrusion 312.

[0032] Specifically, a groove structure that fits with the locking cam 32 for storing the locking cam 32 in the housing 1 is provided. At the same time, the housing 1 is also provided with a second through hole 11 that communicates with the groove structure and fits with the locking pin 31 so that the locking pin 31 is connected to the locking cam 32 through the second through hole 11. In order for the locking pin 31 to penetrate through the second through hole 11 and be securely connected to the locking cam 32, in the present invention, it is preferable that the inner diameter of the second through hole 11 is larger than the outer diameter of the locking protrusion 312.

[0033] In order to further improve the structural stability, in the present invention, it is preferable to provide a limit structure 4 in the housing 1 that is compatible with the lock structure 3. Specifically, it is preferable that a limit pin 41 is provided in the limit structure 4, and a limit ring slot 3212 that is compatible with the limit pin 41 is provided in the cam body 321. Since the limit structure 4 is fixedly connected to the housing 1, the position of the limit pin 41 is fixed. Due to the cooperation between the limit pin 41 and the limit ring slot 3121, the lock cam 32 cannot move in the front-rear direction and can only rotate, thus ensuring the structural stability.

[0034] The above preferred embodiments of the present invention are illustrative. However, through the above description, those skilled in the art can make various changes and modifications without departing from the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the content described in this specification and should be determined based on the claims.

Description of Reference Numerals

[0035] 1 Housing 11 Second through-hole 2 Upper cover 21 First through-hole 3 Lock structure 31 Lock pin 311 Lock pin body 312 Lock protrusion 313 Limit protrusion 32 Lock cam 321 Cam body 3211 Rotary switch 3212 Limit ring slot 322 First locking plate 3221 First notch 3222 First limit slot 323 Second locking plate 3231 Second notch 3232 Second limit slot 324 Positioning protrusion 4 Limit structure 41 Limit Pin

Claims

1. A housing (1), an upper cover (2), and a locking structure (3), wherein the upper cover (2) is connected to the housing (1) via the locking structure (3), the locking structure (3) includes a locking pin (31) and a locking cam (32), the locking pin (31) is slidably connected to the upper cover (2), the locking cam (32) is rotatably connected to the housing (1), the locking pin (31) includes a locking pin body (311) and a locking protrusion (312) disposed at the lower end of the locking pin body (311); the locking cam (32) includes a cam body (321), a first locking plate (322), and a second locking plate (323) that are sequentially connected and disposed inside the cam body (321); the first locking plate (322) is provided with a first notch (3221) and a first limit slot (3222) that communicate with each other, the second locking plate (323) is provided with a second notch (3231) and a second limit slot (3232) that communicate with each other, the first notch (3221), the first limit slot (3222), the second notch (3231), and the second limit slot (3232) cooperate with the locking protrusion (312) to form a locking groove for locking the locking pin (31). A flow measurement device, characterized by this.

2. The flow measurement device according to claim 1, characterized in that the second limit slot (3232) has a through-hole structure.

3. The flow measurement device according to claim 1, characterized in that both the first limit slot (3222) and the second limit slot (3232) have an arc-shaped structure.

4. The flow measurement device according to claim 1, characterized in that a positioning protrusion (324) that abuts against the locking pin (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 outside the cam body (321).

6. The flow measurement device according to claim 1, characterized in that the locking pin (31) includes a limit protrusion (313) disposed at the tip of the locking pin body (311), and the upper cover (2) is provided with a first through-hole (21) through which the locking pin body (311) passes.

7. The flow rate measuring device according to claim 6, wherein the first through hole (21) is a counterbore.

8. The flow rate measuring device according to claim 7, wherein the inner diameter of the small end of the first through hole (21) is smaller than the outer diameter of the locking projection (312).

9. The flow rate measuring device according to claim 1, wherein the housing (1) is provided with a second through hole (11) through which the locking pin (31) passes, and the inner diameter of the second through hole (11) is larger than the outer diameter of the locking projection (312).

10. The flow rate measuring device according to any one of claims 1-9, wherein a limit structure (4) compatible with the locking structure (3) is provided in the housing (1), a limit pin (41) is provided on the limit structure (4), and a limit ring slot (3212) compatible with the limit pin (41) is provided on the cam body (321).

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