A sealing structure of overload instrument

Abstract

The utility model discloses an overload meter sealing structure, including a detection platform and an overload meter body, wherein the overload meter body is installed at the bottom of the detection platform, the overload meter body includes a shell and a detection element arranged inside the shell, a plurality of sealing structures are arranged between the shell and the detection element, and a limited locking structure is arranged in the detection element. The utility model can seal the gap at the threaded connection of the second cavity through a first sealing ring, can seal the gap at the threaded connection of the third cavity through a second sealing ring, can seal the bottom end of the shell through a sealing plate, can seal the joint between the wire and the wire hole through a third sealing ring, and the sealing ring and the sealing plate are used in coordination so that the device has a multi-layer sealing structure with stronger sealing performance, and the forward thread pressing ring and the reverse thread pressing ring can be locked together and the sensing element can be pressed by the coordinated use of the insertion rod and the jack, so that the sensing element is not easy to loosen and fall off.

Description

Technical Field

[0001] The utility model relates to the technical field of overload instruments, in particular to a sealing structure of an overload instrument. Background Art

[0002] Vehicle overloading, over-limit and overspeeding seriously damage highway bridges and culverts, and bring great safety hazards to transportation. In order to protect roads and bridges, overload detection equipment is usually added at various key traffic locations to weigh and detect passing vehicles. The existing overload meter has poor sealing performance, and external water vapor, dust, etc. can easily have an adverse effect on the sensor in the overload meter, resulting in low sensor detection accuracy. At the same time, the sensor elements inside the overload meter are generally only fixed inside by bolts. In daily use, the overload meter is affected by road vibration, which will loosen the bolts and cause the sensor and other sensor elements inside the overload meter to fall off. Utility Model Content

[0003] The purpose of the utility model is to provide an overload meter sealing structure to solve the problems raised in the above background technology.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] An overload meter sealing structure comprises a detection platform and an overload meter body, wherein the overload meter body is installed at the bottom of the detection platform, the overload meter body comprises a shell and a detection element arranged inside the shell, a plurality of sealing structures are arranged between the shell and the detection element, and a limited locking structure is arranged in the detection element.

[0006] As a further solution of the utility model: the interior of the shell is provided with a first cavity, a second cavity and a third cavity in sequence from top to bottom, a forward thread groove is provided on the inner wall of the shell corresponding to the second cavity, a reverse thread groove is provided on the inner wall of the shell corresponding to the third cavity, an opening is provided at the bottom end of the shell and an annular step is integrally formed in the opening, and an opening is provided at the center of the annular step.

[0007] As a further solution of the utility model: the detection element includes a sensor, a forward thread pressure ring, a reverse thread pressure ring and a sealing plate, the sensor is installed in the first cavity, the forward thread pressure ring is fixed in the second cavity, and the top of the forward thread pressure ring is against the sensor after being fixed, the reverse thread pressure ring is fixed in the third cavity, and the top of the reverse thread pressure ring is against the forward thread pressure ring after being fixed, the sealing plate is arranged at the bottom of the annular step, the sensor is connected with a wire, and the forward thread pressure ring, the reverse thread pressure ring and the sealing plate are all provided with a threading plate, and one end of the wire passes through a plurality of the threading plates and extends to the outside of the shell.

[0008] As a further solution of the utility model: a positive thread is arranged on the outer circumference of the positive thread pressure ring, and the positive thread cooperates with the positive thread groove to screw and fix the positive thread pressure ring in the second cavity. An annular groove is opened above the outer circumference of the positive thread pressure ring corresponding to one side of the positive thread, and a first sealing ring is fixed in the groove. The first sealing ring, the positive thread pressure ring and the second cavity cooperate to form a first sealing structure.

[0009] As a further solution of the utility model: a reverse thread is arranged on the outer circumference of the reverse thread pressure ring, and the reverse thread cooperates with the reverse thread groove to screw and fix the reverse thread pressure ring in the third cavity; an annular groove is opened above the outer circumference of the reverse thread pressure ring corresponding to one side of the reverse thread, and a second sealing ring is fixed in the groove; the second sealing ring, the reverse thread pressure ring and the third cavity cooperate to form a second sealing structure.

[0010] As a further solution of the utility model: the sealing plate is fixed to the bottom of the annular step by a plurality of fastening bolts, and a sealing gasket is arranged between the sealing plate and the annular step, and the sealing gasket, the sealing plate and the annular step cooperate to form a third sealing structure.

[0011] As a further solution of the utility model: the wire threading plate is provided with wire holes having the same number as the wires, one end of the wire passes through the wire hole, and a third sealing ring is provided at the joint between the wire hole and the wire, and the third sealing ring, the wire hole and the wire cooperate to form a fourth sealing structure.

[0012] As a further solution of the utility model: a plurality of insertion holes are arranged around the bottom of the forward threaded pressure ring, and a guide hole is opened on one side of the inner wall of the reverse threaded pressure ring corresponding to the plurality of the insertion holes, and a plug rod is slidably inserted in the plurality of guide holes, and one end of the plurality of plug rods extends to the top of the reverse threaded pressure ring and is inserted into the insertion hole on the corresponding side, and a spring is fixed in the plurality of guide holes, and the two ends of the plurality of springs are respectively connected and fixed to the corresponding inner wall of the reverse threaded pressure ring and the plug rod, and the plug rod, the spring, the guide hole and the insertion hole cooperate to lock the forward threaded pressure ring and the reverse threaded pressure ring together, so that a limiting locking structure is formed between the two pressure rings.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] 1. In the utility model, the gap at the threaded connection can be sealed by the first sealing ring to prevent external water vapor from entering the first cavity from the second cavity to protect the sensor. The first sealing ring is arranged at the connection between the second cavity and the positive thread pressure ring to form the first sealing structure of the present application. Further, the gap at the threaded connection can be sealed by the second sealing ring to prevent external water vapor from entering the second cavity from the third cavity. The water vapor is blocked at the intersection of the third cavity and the second cavity to further protect the sensor. The second sealing ring is arranged at the connection between the third cavity and the reverse thread pressure ring to form the first sealing structure of the present application. Second sealing structure, further, the bottom end of the shell is sealed by a sealing plate, and a sealing gasket is added between the sealing plate and the annular step to ensure that there is no gap between the sealing plate and the annular step, thereby preventing external dust, water vapor, etc. from entering the shell, cutting off most of the pollution sources from the source, and this connection method between the sealing plate and the annular step forms the third sealing structure of the present application, and further, a third sealing ring is arranged in the wire hole, and the joint between the wire and the wire hole is sealed by the third sealing ring to prevent external water vapor, dust, etc. from entering the shell along the wire, further protecting the sensor, and forming the fourth sealing structure of the present application;

[0015] 2. In the utility model, the insertion rod and the socket are used in combination, and one end of the insertion rod passes through the reverse thread pressure ring and is inserted into the socket at the bottom of the forward thread pressure ring, so that the forward thread pressure ring and the reverse thread pressure ring can be locked together. This connection method between the two pressure rings forms a limiting locking structure of the present application. When one of the pressure rings is loose, such as the reverse thread pressure ring is sent, under the limiting action of the insertion rod, the forward thread pressure ring will be driven to rotate in the same direction at the same time, while the threads of the forward thread pressure ring and the reverse thread pressure ring are exactly opposite. At this time, the forward thread pressure ring that is driven to rotate will continue to rotate in the direction of its tightening, and the forward thread pressure ring will be further tightened. The same is true in reverse. Therefore, through the coordinated use of two threads in different directions and the insertion rod, etc., the two pressure rings are not easy to loosen, and the sealing structure is more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 This is a schematic structural diagram of the utility model from the first perspective.

[0018] Figure 2 This is a schematic diagram of the structure of the utility model from a second viewing angle.

[0019] Figure 3 It is a structural schematic diagram of the overload meter body in the utility model.

[0020] Figure 4 The figure is a schematic diagram of the internal structure of the half-section of the overload instrument body in the utility model.

[0021] Figure 5 It is an expanded view of the internal structure of the overload instrument body in the utility model after half-section.

[0022] Figure 6 This is an exploded view of the detection components in the overload meter body.

[0023] Figure 7 This is a first-person structural diagram of the positive thread pressure ring in the detection element.

[0024] Figure 8 This is a second-view structural diagram of the positive thread pressure ring in the detection element.

[0025] Fig. 9 It is a schematic diagram of the structure of the reverse threaded pressure ring in the detection element.

[0026] Fig.10 It is a schematic diagram of the structure of the sealing plate in the detection element.

[0027] Fig.11 It is a schematic diagram of the structure of the threading board in the detection element.

[0028] Reference numerals:

[0029] 1-Detection platform;

[0030] 2- Overload meter body;

[0031] 21-housing, 211-first cavity, 212-second cavity, 213-positive thread groove, 214-third cavity, 215-reverse thread groove, 216-annular step;

[0032] 22-detection element, 221-sensor, 222-wire;

[0033] 223-positive thread pressure ring, 2231-first sealing ring, 2232-first through hole, 2233-positive thread, 2234-insertion hole;

[0034] 224-reverse thread pressure ring, 2241-second sealing ring, 2242-guide hole, 2243-second through hole, 2244-reverse thread, 2245-insertion rod, 2246-spring, 2247-pull plate;

[0035] 225-sealing plate, 2251-third through hole, 2252-fastening bolt;

[0036] 226-threading plate, 2261-wire hole, 2262-third sealing ring. DETAILED DESCRIPTION

[0037] The following embodiments will be combined with the accompanying drawings to describe the utility model in detail. In the drawings or descriptions, similar or identical parts use the same reference numerals, and in actual applications, the shape, thickness or height of each component can be enlarged or reduced. The various embodiments listed in the utility model are only used to illustrate the utility model, and are not used to limit the scope of the utility model. Any obvious modifications or changes made to the utility model do not depart from the spirit and scope of the utility model.

[0038] Example 1

[0039] See also Figures 1-2In an embodiment of the utility model, an overload meter sealing structure includes a detection platform 1 and an overload meter body 2. The overload meter body 2 is installed at the bottom of the detection platform 1, and the top plane of the detection platform 1 is used for detection. In this embodiment, multiple overload meter bodies are installed at the bottom of the detection platform. By arranging multiple overload meter bodies in different positions to simultaneously measure the load condition on the top of the detection platform, the measurement result is more accurate.

[0040] See also Figures 3 to 5 The overload meter body 2 includes a shell 21 and a detection element 22 arranged inside the shell 21. The shell 21 has a first cavity 211, a second cavity 212 and a third cavity 214 arranged inside from top to bottom. A positive thread groove 213 is arranged on the inner wall of the shell 21 corresponding to the second cavity 212, and a reverse thread groove 215 is arranged on the inner wall of the shell 21 corresponding to the third cavity 214. An opening is arranged at the bottom end of the shell 21 and an annular step 216 is integrally formed in the opening. An opening is arranged at the center of the annular step 216, and the detection element is installed into the shell through the opening.

[0041] See also Figure 6 The detection element 22 includes a sensor 221, a forward thread pressing ring 223, a reverse thread pressing ring 224 and a sealing plate 225. The sensor 221 is installed in the first cavity 221, the forward thread pressing ring 223 is fixed in the second cavity 212, and the top of the forward thread pressing ring 223 is against the sensor 221 after being fixed. The reverse thread pressing ring 224 is fixed in the third cavity 214, and the top of the reverse thread pressing ring 224 is against the forward thread pressing ring 223 after being fixed. The sealing plate 225 is arranged at the bottom of the annular step 216, and the bottom end opening of the shell 21 is sealed by the sealing plate 225. The sensor 221 is connected with a wire 222, and the forward thread pressing ring 223, the reverse thread pressing ring 224 and the sealing plate 225 are all provided with a threading plate 226. One end of the wire 222 passes through a plurality of threading plates 226 and extends to the outside of the shell 1, and is electrically connected to an external processing device.

[0042] Example 2

[0043] Based on Example 1, please refer to Figures 7-8A first through hole 2232 is provided at the center of the positive thread pressing ring 223, and threading plates 226 are fixed at both upper and lower ends of the first through hole 2232. A positive thread 2233 is provided on the outer circumference of the positive thread pressing ring 223, and the positive thread 2233 cooperates with the positive thread groove 213 to tighten and fix the positive thread pressing ring 223 in the second cavity 212. An annular groove is provided above the outer circumference of the positive thread pressing ring 223 corresponding to one side of the positive thread 2233, and a first sealing groove is fixed in the groove. Ring 2231, the first sealing ring 2231 is made of rubber material, is elastic and expandable, and a plurality of plug holes 2234 are arranged around the bottom of the positive thread pressing ring 223. In this embodiment, the positive thread pressing ring is threadedly connected to the second cavity, and the gap at the threaded connection can be sealed by the first sealing ring 2231 to prevent external water vapor from entering the first cavity from the second cavity to protect the sensor. The first sealing ring is arranged at the connection between the second cavity and the positive thread pressing ring to form the first sealing structure of the present application.

[0044] See also Fig. 9A second through hole 2243 is provided at the center of the reverse thread pressing ring 224, and threading plates 226 are fixed at both upper and lower ends of the second through hole 2243. A reverse thread 2244 is provided on the outer circumference of the reverse thread pressing ring 224, and the reverse thread 2244 cooperates with the reverse thread groove 215 to tighten and fix the reverse thread pressing ring 224 in the third cavity 214. An annular groove is provided above the outer circumference of the reverse thread pressing ring 224 corresponding to one side of the reverse thread 2244, and the groove A second sealing ring 2241 is fixed in the groove. The second sealing ring 2241 is made of rubber material, is elastic and expandable. A guide hole 2242 is opened on one side of the inner wall of the reverse threaded pressure ring 224 corresponding to the multiple plug holes 2234. A plug rod 2245 is slidably inserted in the multiple guide holes 2242. One end of the multiple plug rods 2245 extends to the top of the reverse threaded pressure ring 224 and is inserted into the plug hole 2234 on the corresponding side. A spring 224 is fixed in each of the multiple guide holes 2242. 6, and the two ends of multiple springs 2246 are respectively connected and fixed with the corresponding inner wall of the reverse threaded pressure ring 224 and the plug rod 2245, the bottom ends of the multiple plug rods 2245 extend to the bottom of the reverse threaded pressure ring 224, and the bottom ends of the multiple plug rods 2245 are fixed with pull plates 2247, the plug rod is used in conjunction with the jack, one end of the plug rod passes through the reverse threaded pressure ring and is inserted into the jack at the bottom of the forward threaded pressure ring, so that the forward threaded pressure ring and the reverse threaded pressure ring can be locked together, and this connection between the two pressure rings forms a limit locking structure of the present application. In addition, in this embodiment, the reverse threaded pressure ring is threadedly connected to the third cavity, and the gap at the threaded connection can be sealed by the second sealing ring 2241 to prevent external water vapor from entering the second cavity from the third cavity. The water vapor is blocked at the intersection of the third cavity and the second cavity, further protecting the sensor, and the second sealing ring is arranged at the connection between the third cavity and the reverse threaded pressure ring to form the second sealing structure of the present application.

[0045] See also Fig.10A third through hole 2251 is provided at the center of the sealing plate 225, the apertures of the first through hole 2232, the second through hole 2243 and the third through hole 2251 are the same, and the centers of the first through hole 2232, the second through hole 2243 and the third through hole 2251 are located in the same straight line, a threading plate 226 is fixed in the third through hole 2251, and a plurality of fastening bolts 2252 are provided on the sealing plate 225. In this embodiment, matching screw holes are provided on one side of the inner wall of the annular step 216 corresponding to the plurality of fastening bolts 2252. The sealing plate can be fixed to the bottom of the annular step by the matching use of the bolts and the screw holes, thereby sealing the bottom end of the shell to prevent external dust, water vapor, etc. from entering the shell, cutting off most of the pollution sources from the source, and a small amount of water vapor entering the bottom of the shell. When the sensor is in the opening at the end (that is, the cavity at the bottom of the shell), the water vapor and dust are intercepted for the second time by the third cavity and the second sealing ring, and then the water vapor and dust are intercepted for the third time by the second cavity and the first sealing ring. At this time, the dust, water vapor, etc. are almost completely intercepted without any residue, so that the first cavity located at the top of the shell is almost in a completely sealed state, so that the sensor installed in the first cavity can remain clean for a long time, and the sensor can work more stably and longer, and the sensor has a longer service life and higher measurement accuracy. In order to ensure the sealing performance of the bottom end of the shell, a sealing gasket is added between the sealing plate and the annular step to ensure that there is no gap between the sealing plate and the annular step. This connection method between the sealing plate and the annular step forms the third sealing structure of the present application.

[0046] Example 3

[0047] Based on Examples 1 and 2, please refer to Fig.11 The threading plate 226 is provided with wire holes 2261 having the same number as the wires 222. One end of the wire 222 passes through the wire hole 2261, and a third sealing ring 2262 is provided at the joint between the wire hole 2261 and the wire 222. The third sealing ring further prevents external water vapor, dust, etc. from entering the housing along the wire, thereby further protecting the sensor. In this embodiment, a third sealing ring is provided in the wire hole, and the joint between the wire and the wire hole is sealed by the third sealing ring, thereby forming the fourth sealing structure of the present application.

[0048] Working principle:

[0049] Install the sensor 221 in the first cavity 211, and then tighten the positive thread pressing ring 223 and the reverse thread pressing ring 224 in sequence. When installing the two pressing rings, the wire 222 of the sensor needs to pass through the wire holes 2261 reserved on the two pressing rings in sequence. After installation, the sensor will be fixed in the housing and the wire of the sensor can be extended to the outside of the housing;

[0050] When the reverse thread pressing ring 224 is installed, it is necessary to pull the pull plate 2247 to pull the insertion rod 2245 down so as not to interfere with the forward thread pressing ring 223. When the reverse thread pressing ring 224 is tightened, the pull plate is loosened, and under the action of the spring 2246, the insertion rod is reset and inserted into the insertion hole 2245 on the corresponding side, so that the reverse thread pressing ring 224 and the forward thread pressing ring 223 are limited. When one of the pressing rings is loose, such as the reverse thread pressing ring is sent, under the limiting action of the insertion rod, the forward thread pressing ring will be driven to rotate in the same direction at the same time, while the threads of the forward thread pressing ring and the reverse thread pressing ring are exactly opposite. At this time, the forward thread pressing ring driven to rotate will continue to rotate in the direction of its tightening, and the forward thread pressing ring will be further tightened, and vice versa. Therefore, through the use of two threads in different directions and the insertion rod, etc., it is not easy for the two pressing rings to loosen, and the sealing structure is more stable.

[0051] After the sensor and two pressure rings inside the shell are installed, the sealing plate 225 is fixed to the bottom of the annular step 216 at the bottom end of the shell by tightening the bolts 2252 to encapsulate the shell as a whole. At this point, the shell forms a completely sealed structure with the outside world, and the detection elements inside the shell will not be affected by the external environment.

[0052] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0053] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An overload meter sealing structure, comprising a detection platform and an overload meter body, wherein the overload meter body is installed at the bottom of the detection platform, characterized in that: The overload meter body comprises a shell and a detection element arranged inside the shell, a plurality of sealing structures are arranged between the shell and the detection element, and a limited locking structure is arranged in the detection element.

2. The overload meter sealing structure according to claim 1, characterized in that: The interior of the shell is provided with a first cavity, a second cavity and a third cavity in sequence from top to bottom, a forward thread groove is provided on the inner wall of the shell corresponding to the second cavity, and a reverse thread groove is provided on the inner wall of the shell corresponding to the third cavity. An opening is provided at the bottom end of the shell and an annular step is integrally formed in the opening, and an opening is provided at the center of the annular step.

3. The overload meter sealing structure according to claim 2, characterized in that: The detection element includes a sensor, a forward thread pressure ring, a reverse thread pressure ring and a sealing plate. The sensor is installed in the first cavity. The forward thread pressure ring is fixed in the second cavity, and the top of the forward thread pressure ring abuts against the sensor after being fixed. The reverse thread pressure ring is fixed in the third cavity, and the top of the reverse thread pressure ring abuts against the forward thread pressure ring after being fixed. The sealing plate is arranged at the bottom of the annular step. A wire is connected to the sensor. The forward thread pressure ring, the reverse thread pressure ring and the sealing plate are all provided with threading plates. One end of the wire passes through a plurality of the threading plates and extends to the outside of the shell.

4. The overload meter sealing structure according to claim 3, characterized in that: A positive thread is arranged on the outer circumference of the positive thread pressure ring, and the positive thread cooperates with the positive thread groove to screw and fix the positive thread pressure ring in the second cavity. An annular groove is opened above the outer circumference of the positive thread pressure ring corresponding to one side of the positive thread, and a first sealing ring is fixed in the groove. The first sealing ring, the positive thread pressure ring and the second cavity cooperate to form a first sealing structure.

5. The overload meter sealing structure according to claim 4, characterized in that: A reverse thread is arranged on the outer circumference of the reverse thread pressing ring, and the reverse thread cooperates with the reverse thread groove to screw and fix the reverse thread pressing ring in the third cavity. An annular groove is opened above the outer circumference of the reverse thread pressing ring corresponding to one side of the reverse thread, and a second sealing ring is fixed in the groove. The second sealing ring, the reverse thread pressing ring and the third cavity cooperate to form a second sealing structure.

6. The overload meter sealing structure according to claim 5, characterized in that: The sealing plate is fixed to the bottom of the annular step by a plurality of fastening bolts, and a sealing gasket is arranged between the sealing plate and the annular step. The sealing gasket, the sealing plate and the annular step cooperate to form a third sealing structure.

7. The overload meter sealing structure according to claim 6, characterized in that: The threading plate is provided with wire holes having the same number as the wires, one end of the wire passes through the wire hole, and a third sealing ring is provided at the joint between the wire hole and the wire, and the third sealing ring, the wire hole and the wire cooperate to form a fourth sealing structure.

8. The overload meter sealing structure according to claim 5 or 7, characterized in that: A plurality of insertion holes are arranged around the bottom of the forward threaded pressure ring, and a guide hole is opened on one side of the inner wall of the reverse threaded pressure ring corresponding to the plurality of the insertion holes, and a plug rod is slidably inserted in the plurality of guide holes, and one end of the plurality of plug rods extends to the top of the reverse threaded pressure ring and is inserted into the insertion hole on the corresponding side, and a spring is fixed in the plurality of guide holes, and the two ends of the plurality of springs are respectively connected and fixed to the corresponding inner wall of the reverse threaded pressure ring and the plug rod, and the plug rod, the spring, the guide hole and the insertion hole cooperate to lock the forward threaded pressure ring and the reverse threaded pressure ring together, so that a limit locking structure is formed between the two pressure rings.

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