CN115014493A

CN115014493A - Electronic balance for outdoor work

Info

Publication number: CN115014493A
Application number: CN202210717040.2A
Authority: CN
Inventors: 张学成; 王建国; 王继船; 窦广义
Original assignee: Jinan Xinguang Testing Machine Co ltd
Current assignee: Jinan Xinguang Testing Machine Co ltd
Priority date: 2022-06-23
Filing date: 2022-06-23
Publication date: 2022-09-06
Anticipated expiration: 2042-06-23
Also published as: CN115014493B

Abstract

The application discloses electronic balance of outdoor work belongs to measurement technical field. The electronic balance includes: the bearing plate is used for placing a piece to be weighed; the weighing device comprises a table body, wherein a weighing sensor is arranged below the table body and connected with an indicator, the table body can ascend or descend relative to a bearing plate, when the table body is located below the bearing plate, articles are loaded on the bearing plate by a piece to be weighed, and the table body ascends to weigh the loaded piece to be weighed. By utilizing the electronic balance, the piece to be weighed can be switched between the loading state and the metering state at the same position, so that the mass of the piece to be weighed can be accurately weighed on site, the service life of the electronic balance is prolonged, the transfer step of the piece to be weighed can be saved, the time and the cost are saved, and the accuracy of the verification result of the weighing machine is improved.

Description

Electronic balance for outdoor work

Technical Field

The application relates to an electronic balance for outdoor work, and belongs to the technical field of metering.

Background

Quality comparison or measurement is a work content which is widely applied in human life and production. In reality, however, accurate comparison of the field mass of a large mass of items to be weighed is often not an easy task. For example, in-situ calibration of a large scale weighing apparatus requires the use of standard weights, but due to the difficulty of transportation and high cost, the calibration using standard weights becomes difficult, and therefore equivalent standard weights are prepared by loading liquid or particles on the member to be weighed.

However, in the preparation of the equivalent standard weights, the final mass of the to-be-weighed piece is required to be accurately metered, if the electronic balance is directly loaded and metered, the electronic balance is subjected to a large load, the metering result is inaccurate after the electronic balance is used for a long time, and the service life of the electronic balance is shortened; if the loaded piece to be weighed is transferred to the electronic balance for metering, the transfer cost is increased, and under the condition that the mass of the loaded piece to be weighed is large, the mass of the piece to be weighed is changed due to multiple transfers, so that the verification result of the weighing apparatus is influenced.

Disclosure of Invention

In order to solve the problems, the application provides an electronic balance working outdoors, a table body of the electronic balance has two working states of a high position and a low position, the electronic balance is not weighed when the electronic balance is in the low position, a part to be weighed can be loaded on a bearing plate, the part to be weighed is subjected to high-precision mass comparison when the electronic balance is in the high position, mass quantity value transmission is completed, the electronic balance is utilized, the part to be weighed can be switched between a loading state and a metering state at the same position, the mass of the part to be weighed can be accurately weighed on site, the service life of the electronic balance is prolonged, the transferring step of the part to be weighed can be saved, time and cost are saved, and the accuracy of a calibrating result of the weighing apparatus is improved.

According to one aspect of the present application, there is provided an electronic balance for outdoor operation, comprising:

the bearing plate is used for placing a piece to be weighed;

the weighing device comprises a table body, wherein a weighing sensor is arranged below the table body and connected with an indicator, the table body can ascend or descend relative to a bearing plate, when the table body is located below the bearing plate, articles are loaded on the bearing plate by a piece to be weighed, and the table body ascends to weigh the loaded piece to be weighed.

Optionally, further comprising a base and a support;

the weighing sensor is arranged above the base, a pressing plate is connected above the weighing sensor and positioned below the table body, and a lifting mechanism is arranged between the pressing plate and the table body;

the supporting piece is arranged between the base and the bearing plate and used for supporting the bearing plate.

Optionally, the table body is hollow to form an accommodating cavity, a first through hole is formed in the bottom surface of the table body, the supporting piece penetrates through the first through hole and is connected with the bearing plate and the base respectively, a second through hole is formed in the top surface of the table body, and the radial cross-sectional area of the bearing plate is smaller than the opening area of the second through hole;

preferably, the number of the first through holes is at least two, and each first through hole accommodates at least one of the supporting members.

Preferably, the opening area of the first through hole is larger than the radial cross-sectional area of the support member.

Optionally, the lifting mechanism comprises an eccentric shaft, a connecting rod and a supporting seat,

the supporting seat is fixed on the pressing plate, the eccentric shaft is abutted against the table body, the connecting rod is arranged between the eccentric shaft and the supporting seat, the connecting rod is parallel to the central line of the eccentric shaft but not superposed with the central line of the eccentric shaft, and the connecting rod is connected with the supporting seat through a bearing;

preferably, the number of the lifting mechanisms is at least two, and the lifting mechanisms are symmetrically arranged along the center of the pressing plate.

Optionally, the table further comprises a guide rotation-preventing mechanism, a third through hole is formed in the pressing plate, one end of the guide rotation-preventing mechanism penetrates through the third through hole to be connected with the table body, and the other end of the guide rotation-preventing mechanism is arranged in a suspended mode relative to the base;

preferably, the third through hole is formed in the center of the pressing plate, and the guide rotation-preventing mechanism and the pressing plate are arranged on the same central axis.

Preferably, a shaft sleeve is arranged on the periphery of the third through hole, and the guiding anti-rotation mechanism is arranged in the shaft sleeve.

Optionally, a baffle is arranged below the table body, the baffle is arranged in the circumferential direction of the table body, and the bottom end of the baffle is lower than the upper end face of the base and higher than the lower end face of the base.

Optionally, the table further comprises a precision pump and a hose which are connected, the free end of the hose is arranged above the table body and is connected with a joint, the joint is fixed on the table body, and the table body is lifted so that the hose is communicated with the adjusting port of the piece to be weighed through the joint.

Optionally, be provided with inlet channel in the bearing plate, just the bearing plate top is provided with annotates the liquid leakage fluid dram, annotate the liquid leakage fluid dram with the piece intercommunication of waiting to weigh of placing on the bearing plate, inlet channel and two-way pump and notes liquid leakage fluid dram intercommunication.

Optionally, a plugging piece is arranged at the joint of the bidirectional pump and the liquid inlet channel, the plugging piece comprises a valve core, a push rod and a connecting seat which are sequentially connected, the valve core is in a circular truncated cone shape, and a spring is sleeved on the periphery of the push rod; the liquid inlet channel comprises a first channel and a second channel, the first channel is in a round table shape and is abutted to the valve core, one end of the push rod is arranged in the first channel, the other end of the push rod and the connecting seat are arranged in the second channel, one end of the spring is connected with the connecting seat, and the other end of the spring is fixed on the second channel.

Optionally, a locking groove is formed in the second channel, the locking groove is formed in one side, away from the valve core, of the connecting seat, and an elastic piece is arranged in the locking groove and can extend out or retract along the radial direction of the second channel.

Optionally, the liquid injection and discharge port further comprises a third channel, the third channel is arranged between the first channel and the second channel, and the radial cross-sectional area of the third channel is equal to the radial cross-sectional area of the bottom of the first channel and smaller than the radial cross-sectional area of the second channel; the push rod sequentially passes through the first channel, the third channel and the second channel, the radial cross-sectional area of the spring is smaller than that of the third channel, and the spring is fixed to the top of the second channel.

Optionally, the length of the spool is less than the length of the first passage, and the spool abuts a side of the first passage adjacent to the loading chamber.

Optionally, the connecting seat is circumferentially provided with a slot.

Optionally, the precision pump is arranged in the bearing plate and communicated with the liquid inlet channel.

Optionally, the second through hole is in an inverted circular truncated cone shape, and an included angle between the inner periphery of the second through hole and the axis of the second through hole is 5-15 °.

Benefits that can be produced by the present application include, but are not limited to:

1. the application provides an electronic balance of outdoor work can realize that the loading of mass measurement and the piece of waiting to weigh is accomplished at same operating position, and automatic switch improves work efficiency, can treat the accurate weighing of the quality of the piece of weighing on the scene, prolongs electronic balance's life, can practice thrift the transfer step of the piece of waiting to weigh again, and save time and cost improve the accuracy of weighing apparatus examination result.

2. The application provides an electronic balance of outdoor work, elevating system improve the lifting force to the stage body in the rise or decline process, guarantee that the top surface of stage body is steady to improve the accuracy of testing result.

3. According to the electronic balance working outdoors, the guide anti-rotation mechanism is arranged between the pressing plate and the platform body, the relative movement of the pressing plate and the platform body is ensured to be ascending or descending movement, the relative rotation is not generated, and the stability of the platform body in the ascending or descending process is ensured.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1 is a loading state diagram of a structure of an electronic balance according to an embodiment of the present application;

FIG. 2 is an enlarged view of a portion A of FIG. 1;

fig. 3 is a weighing state diagram of one configuration of an electronic balance according to an embodiment of the present application;

FIG. 4 is a partial enlarged view of portion B of FIG. 3;

fig. 5 is a loading state diagram of another configuration of an electronic balance according to an embodiment of the present application;

fig. 6 is a weighing state diagram of another configuration of the electronic balance according to the embodiment of the present application;

FIG. 7 is an enlarged view of a portion C of FIG. 6;

fig. 8 is a perspective view of the plugging member according to the embodiment;

list of parts and reference numerals:

10. a part to be weighed; 21. a bearing plate; 211. a support member; 212. a base; 213. a liquid injection and discharge port; 214. a precision pump; 215. a hose; 2151. a joint; 22. a table body; 221. an accommodating chamber; 222. a first through hole; 223. a second through hole; 224. a baffle plate; 225. a guide rotation-preventing mechanism; 23. an eccentric shaft; 24. A connecting rod, 25 and a supporting seat; 26. a weighing sensor; 27. an indicator; 28. pressing a plate; 29. a liquid inlet channel; 291. a first channel; 292. a second channel; 293. a third channel; 30. a blocking member; 31. a valve core, 32 and a push rod; 33. a connecting seat; 331. grooving; 34. a spring; 35. an elastic member.

Detailed Description

In order to more clearly explain the overall concept of the present application, the following detailed description is given by way of example in conjunction with the accompanying drawings.

In order that the above objects, features and advantages of the present application can be more clearly understood, the present application will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, the present application may be practiced in other ways than those described herein, and therefore the scope of the present application is not limited by the specific embodiments disclosed below.

In addition, in the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on those shown in the drawings, are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Referring to fig. 1-8, embodiments of the present application disclose an electronic balance for outdoor operation, comprising: the bearing plate 21 is used for placing the piece to be weighed 10; the weighing device comprises a table body 22, wherein a weighing sensor 26 is arranged below the table body 22, the weighing sensor 26 is connected with an indicator 27, the table body 22 can ascend or descend relative to a bearing plate 21, when the table body 22 is located below the bearing plate 21, articles are loaded on the bearing plate 21 by a piece to be weighed 10, and the table body 22 ascends to weigh the loaded piece to be weighed 10.

The electronic balance has two working states, one is that the table body 22 is positioned below the bearing plate 21, the table body 22 is at a low position at the moment, the object 10 to be weighed is loaded on the bearing plate 21, and the table body 22 is not in contact with the object 10 to be weighed, so that the object 10 to be weighed is not weighed; when the articles loaded in the piece to be weighed 10 reach a certain amount, the state is switched to the second state, at this time, the table body 22 rises to the position above the bearing plate 21, the table body 22 is in a high position, contacts with the piece to be weighed 10 and enables the piece to be weighed 10 to be separated from the contact with the bearing plate 21, the table body 22 weighs the piece to be weighed 10, the weighing sensor 26 transmits the detected weight value to the indicator 27, and the actual mass of the piece to be weighed 10 is read through the indicator 27.

If the piece 10 to be weighed is loaded and weighed on the table body 22 all the time, the table body 22 and the weighing sensor 26 can be in the weighing working state all the time, and the long-time load of the table body 22 and the weighing sensor 26 can reduce the weighing sensitivity, so that the electronic balance fails to measure the mass of the piece 10 to be weighed. The electronic balance can realize that the loading and the metering weighing of the piece to be weighed 10 are completed at the same working position, reduces the steps of transferring the loaded piece to be weighed 10 to a weighing device for weighing, saves time and cost, can automatically switch the working state of the electronic balance according to the loading state of the piece to be weighed 10, and improves the working efficiency; but also can ensure the accuracy of the weighing results of the platform body 22 and the weighing sensor 26 and improve the stability of the quantity value in the verification of the large weighing apparatus.

Specifically, the above-mentioned piece 10 to be weighed after loading, stage body 22 can carry out mass adjustment to its in-process of weighing, also can not adjust, if carry out mass adjustment, then can obtain the quality (within the error range) that is equal with standard weight quantity, if not adjust can obtain the piece 10 to be weighed that has the corrected value, this piece 10 to be weighed has the accurate value of the quality that corresponds with electronic balance, still can be used for carrying out accurate examination to large-scale weighing apparatus. Before the electronic balance is used, the electronic balance needs to be calibrated by using the standard weight, then loading and weighing are carried out, the accuracy grade of the electronic balance and the standard weight determines the accuracy grade of the piece to be weighed 10, and in order to verify a large weighing apparatus, the accuracy grade of the piece to be weighed 10 is not lower than M ₁ And (4) selecting the mass grades of the electronic balance and the standard weight according to actual needs.

Specifically, the way of raising or lowering the table 22 with respect to the bearing plate 21 is not particularly limited as long as the table 22 can be moved, and for example, a telescopic rod may be provided between the table 22 and the load cell 26, and the table 22 may be driven to raise or lower by the expansion or contraction of the telescopic rod, which may be driven by a cylinder, a hydraulic cylinder, or the like; a pulling mechanism can also be arranged above the table body 22, the table body 22 is driven to ascend or descend by the pulling mechanism, and the pulling mechanism can be pulled by a chain wheel and a steel rope; an eccentric shaft 23 can be further arranged between the table body 22 and the weighing sensor 26, the table body 22 is lifted or lowered relative to the weighing sensor 26 through the rotation of the eccentric shaft 23, the table body 22 is lifted or lowered relative to the bearing plate 21, and the table body 22 is always in a horizontal state so as to compare effective magnitude of the weighing member 10, and the rotation of the eccentric shaft 23 can be driven by a motor.

As an embodiment, the electronic balance further includes a base 212 and a support 211; the weighing sensor 26 is arranged above the base 212, the pressing plate 28 is connected above the weighing sensor 26, the pressing plate 28 is positioned below the table body 22, and the lifting mechanism is arranged between the pressing plate 28 and the table body 22; the support 211 is disposed between the base 212 and the bearing plate 21 for supporting the bearing plate 21. The base 212 provides a supporting force for the bearing plate 21 and the table body 22, and the arrangement of the pressing plate 28 and the lifting mechanism facilitates stable ascending or descending of the table body 22 and improves the supporting force of the table body 22 on the weighing member 10.

Specifically, when the table body 22 is lifted to weigh the object 10 to be weighed, referring to fig. 6, the table body 22 may contact with the circumferential direction of the object 10 to be weighed, so as to lift the object 10 to be weighed, and the object 10 to be weighed is separated from the bearing plate 21; referring to fig. 3, the table 22 may also contact the bottom surface of the member 10 to be weighed, so as to lift the member 10 to be weighed, in which case, the table 22 may contact the circumference of the bottom surface of the member 10 to be weighed, for example, the table 22 is disposed around the circumference of the bearing plate 21, or may contact only a part of the bottom surface of the member 10 to be weighed, for example, the table 22 is disposed on one side of the bearing plate 21.

As an embodiment, the table body 22 is hollow to form an accommodating cavity 221, a first through hole 222 is formed in the bottom surface of the table body 22, the supporting member 211 penetrates through the first through hole 222 to be connected with the bearing plate 21 and the base 212, respectively, a second through hole 223 is formed in the top surface of the table body 22, and the radial cross-sectional area of the bearing plate 21 is smaller than the opening area of the second through hole 223. The arrangement can reduce the occupied area of the electronic balance, and when the table body 22 ascends, the bearing plate 21 enters the accommodating cavity 221 of the table body 22, so that the table body 22 can ascend or descend conveniently, and the electronic balance can be switched between two working states quickly.

Specifically, the first through hole 222 may be a plurality of openings formed in the bottom surface of the table body 22, the supporting member 211 is a supporting column, the supporting column passes through the first through hole 222 to connect the base 212 and the bearing plate 21, each opening accommodates at least one supporting member 211, and the shape of the opening may be any one of a circle, a square, a triangle, or a polygon; this first through-hole 222 can be for seting up an annular hole on stage body 22 bottom surface, and support piece 211 is a circular shape backup pad this moment, and then weighing sensor 26 sets up inside the backup pad, can weighing sensor 26 play the guard action, improves the accuracy that weighing sensor 26 weighed.

As a preferred embodiment, the opening area of the first through hole 222 is larger than the radial cross-sectional area of the support 211, so that the table body 22 is prevented from rigidly colliding with the support 211 during ascending or descending, and the flexibility of ascending and descending the table body 22 is improved.

In one embodiment, the lifting mechanism includes an eccentric shaft 23, a connecting rod 24, and a support 25, the support 25 is fixed to a platen 28, the eccentric shaft 23 abuts against the table 22, the connecting rod 24 is disposed between the eccentric shaft 23 and the support 25, the connecting rod 24 is parallel to but not coincident with the center line of the eccentric shaft 23, and the connecting rod 24 and the support 25 are connected by a bearing. The supporting seat 25 is fixed on the pressing plate 28, the connecting rod 24 can rotate in the hole of the bearing, and the central line of the eccentric shaft 23 can ascend or descend along with the rotation of the connecting rod 24, so that the vertical distance between the pressing plate 28 and the table body 22 is changed, and the ascending and descending of the table body 22 are realized.

As a preferred embodiment, the number of the lifting mechanisms is at least two, that is, the number of the eccentric shafts 23, the connecting rods 24 and the supporting seats 25 is at least two, and the lifting mechanisms are symmetrically arranged along the center of the pressing plate 28, so that the lifting force during the process of lifting or lowering the table body 22 is improved, the top surface of the table body 22 is ensured to be stable, and the accuracy of the detection result is improved. With this arrangement, when there are two lifting mechanisms, the lifting mechanisms are symmetrically arranged with respect to the center line of the pressing plate 28, and when there are three lifting mechanisms, the lifting mechanisms are distributed in an equilateral triangle, and the center of the equilateral triangle is the center of the pressing plate 28.

As an embodiment, the electronic balance further includes a guiding rotation-preventing mechanism 225, a third through hole is formed on the pressing plate 28, one end of the guiding rotation-preventing mechanism 225 passes through the third through hole to be connected with the platform body 22, and the other end is suspended relative to the base 212; a guide rotation-preventing mechanism 225 is also provided between the pressure plate 28 and the table body 22, and ensures that the relative movement between the two is ascending or descending movement and does not generate relative rotation. The suspension distance of the guiding rotation-preventing mechanism 225 relative to the base 212 can be set according to the required ascending or descending distance of the table body 22, and the guiding rotation-preventing mechanism 225 does not depart from the third through hole and does not contact the base 212.

In one embodiment, the third through hole is disposed at the center of the pressure plate 28, and the guiding and rotation-preventing mechanism 225 is disposed coaxially with the pressure plate 28. This setting can further improve the direction and prevent changeing the guide function of mechanism 225 to stage body 22, can also guarantee the plane stability when stage body 22 rises, avoids stage body 22 to appear inclining.

As a preferred embodiment, a shaft sleeve is arranged in the circumferential direction of the third through hole, and the guide rotation-preventing mechanism 225 is arranged in the shaft sleeve, so that the shaft sleeve can limit and fix the guide rotation-preventing mechanism 225.

In one embodiment, a baffle 224 is disposed below the table 22, the baffle 224 is disposed in the circumferential direction of the table 22, and the bottom end of the baffle 224 is lower than the upper end surface of the base 212 and higher than the lower end surface of the base 212. The arrangement of the baffle 224 can protect the support 211 and the weighing sensor 26, and eliminate the interference generated by the weighing sensor 26 in the external environment, thereby ensuring the accuracy of the weighing result; and the barrier 224 can also improve the aesthetics of the electronic balance.

In general, for the object 10 to be weighed used in the large scale weighing apparatus verification, the loaded object is liquid, preferably water, which not only can improve the loading efficiency, but also is easy to obtain and is convenient for smooth unfolding of the verification work, in order to realize the mass adjustment of the object 10 to be weighed in the weighing process, the end face of the object 10 to be weighed, which is in contact with the table body 22, is provided with an adjusting port, the electronic balance comprises a precision pump 214 and a hose 215 which are connected, the free end of the hose 215 is arranged above the table body 22 and is connected with a joint 2151, and the table body 22 is lifted, so that the hose 215 is communicated with the adjusting port of the object 10 to be weighed through the joint 2151. The joint 2151 is fixed on the table body 22, the joint 2151 is communicated with the adjusting port of the to-be-weighed piece 10 in the process that the table body 22 rises through the hose 215, the hose 215 and the joint 2151 achieve liquid exchange between the precision pump and the to-be-weighed piece 10, the to-be-weighed piece 10 can be precisely adjusted in the weighing process, and therefore the finally obtained quantity value of the to-be-weighed piece 10 is equal to that of a standard weight in an error range. The weight of the hose 215 provided does not lead to a deviation in the weighing result of the item to be weighed 10 in the actual weighing.

As an embodiment, referring to fig. 5-6, a liquid inlet channel 29 is disposed in the bearing plate 21, and a liquid inlet and outlet 213 is disposed above the bearing plate 21, the liquid inlet and outlet 213 is communicated with the member to be weighed 10 placed on the bearing plate 21, and the liquid inlet channel 29 is communicated with the bidirectional pump and the liquid inlet and outlet 213. Set up inlet channel 29 and notes liquid leakage fluid dram 213 in bearing plate 21 is inside, treat to be provided with the opening of annotating liquid leakage fluid dram 213 intercommunication on the piece 10 of weighing, then treat that a 10 accessible bearing plate 21 of weighing loads, reduce the outside spare part that loads the use, improve electronic balance's practicality, can also improve loading efficiency simultaneously. The bidirectional pump and the liquid injection and discharge port 213 are designed to realize the loading and unloading of the to-be-weighed piece 10, so that the loading and unloading efficiency of the to-be-weighed piece 10 is improved, the preparation time of the to-be-weighed piece 10 in the verification process is saved, and the verification efficiency is improved.

As an embodiment, a plugging piece 30 is arranged at the joint of the two-way pump and the liquid inlet channel 29, referring to fig. 7, the plugging piece 30 comprises a valve core 31, a push rod 32 and a connecting seat 33 which are connected in sequence, the valve core 31 is in a circular truncated cone shape, and a spring 34 is sleeved on the periphery of the push rod 32; the liquid inlet passage 29 includes a first passage 291 and a second passage 292, the first passage 291 is a circular truncated cone and abuts against the valve element 31, one end of the push rod 32 is disposed in the first passage 291, the other end and the connecting seat 33 are disposed in the second passage 292, one end of the spring 34 is connected to the connecting seat 33, and the other end is fixed on the second passage 292.

In the water injection process, the water pipe is communicated with the second channel 292, the water pipe pushes the connecting seat 33 upwards, the spring 34 is compressed, the push rod 32 and the valve core 31 move towards the direction of the loading cavity, water enters the container from the connecting seat 33 and the first channel 291, when water is not injected or the container is filled with water, the valve core 31 is abutted against the first channel 291 again under the action force of the water and the pulling force of the spring 34, the valve core 31 is reset, the self-sealing of the liquid injection and discharge port 213 is realized, the water in the container is prevented from being leaked, and the stability of the container quantity value is improved; when water needs to be drained, the water pipe can be used for continuously jacking the connecting seat 33 upwards, so that a gap exists between the valve core 31 and the first passage 291, and water in the container flows out of the first passage 291 and the connecting seat 33 to the water pipe in sequence, so that water is drained. Above-mentioned shutoff piece 30 set up can realize intaking by oneself and the drainage to automatic seal after intaking and drainage are accomplished need not the manual work and operates, can improve the sealing performance of container, can practice thrift operating procedure again, improve the use convenience of container.

In one embodiment, the second channel 292 has a locking groove formed therein, the locking groove is disposed on a side of the connecting seat 33 away from the valve core 31, and the locking groove has an elastic member 35 disposed therein, and the elastic member 35 can extend or retract along a radial direction of the second channel 292. The elastic component 35 that sets up in the locking groove can lock the water pipe to realize water injection or drainage in-process, the location of water pipe and shutoff piece 30 treat water injection or drainage process after accomplishing, can use external force to take out the water pipe from elastic component 35, the setting of this elastic component 35 can realize the locking of water pipe, further improves the practicality of container.

Specifically, the locking groove may be a single groove formed along the radial direction of the second passage 292, one elastic member 35 is disposed in the groove, and the number of the grooves may be two or more; the locking groove may also be an annular groove formed along the radial direction of the second passage 292, an annular elastic member 35 is disposed in the annular groove, and the annular elastic member 35 is tightly fastened in the circumferential direction of the water pipe to lock the water pipe.

As a preferred embodiment, the end of the elastic member 35 away from the locking groove, i.e. the free end of the elastic member 35, is provided with a circular arc shape, which facilitates the water pipe to compress the elastic member 35, thereby achieving the locking of the water pipe.

As an embodiment, the liquid injection and discharge port 213 further includes a third passage 293, the third passage 293 is disposed between the first passage 291 and the second passage 292, and a radial cross-sectional area of the third passage 293 is equal to a radial cross-sectional area of the bottom of the first passage 291 and is smaller than a radial cross-sectional area of the second passage 292; the push rod 32 passes through a first passage 291, a third passage 293 and a second passage 292 in sequence, the radial cross-sectional area of the spring 34 is smaller than that of the third passage 293, and the spring 34 is fixed on the top of the second passage 292. The third channel 293 plays a role in connecting the first channel 291 and the second channel 292, and the radial cross-sectional area of the third channel 293 is smaller than that of the second channel 292, referring to fig. 7, the third channel 293 can limit the spring 34 and ensure that the spring 34 can be timely restored to the original position, so that the self-sealing of the liquid injection and discharge port 213 is realized, and the connecting seat 33 can be prevented from being pushed into the first channel 291 by a water pipe.

In one embodiment, the length of the spool 31 is smaller than the length of the first passage 291, the spool 31 abuts against one side of the first passage 291 close to the loading chamber, and after the spool 31 seals the first passage 291, a certain gap exists in the first passage 291, which is beneficial for the compression of the spring 34, so that the push rod 32 pushes the spool 31 to move towards the loading chamber, and the water flow is facilitated, thereby improving the water filling and draining efficiency.

As an embodiment, the connection seat 33 is circumferentially provided with a slot 331, when water is filled, the top of the water pipe ejects the connection seat 33 towards the first passage 291, the push rod 32 pushes the valve core 31 to move towards the loading cavity, water flows into the loading cavity from the water pipe, the slot 331, the second passage 292, the third passage 293 and the first passage 291, and when water is drained, the flow direction of the water is opposite.

Specifically, the position of the precision pump 214 is not particularly limited, and may be disposed outside the table 22, between the table 22 and the bearing plate 21, or on the bearing plate 21.

In one embodiment, the precision pump 214 is disposed in the bearing plate 21 and communicates with the liquid inlet channel 29. When the precision pump 214 is arranged on the bearing plate 21, the precision pump 214 is always in a fixed state, so that the stability of quality adjustment of the weighing part 10 to be weighed can be improved, and the table body 22 can accurately measure the weighing part 10 in real time. Precision pump 214 and inlet channel 29 intercommunication, then can be directly with the liquid transmission in the inlet channel 29 to wait to weigh in the piece 10, also can be with waiting to weigh in the liquid uninstallation of piece 10 to inlet channel 29, the operation of being convenient for.

Referring to fig. 5 to 6, as an embodiment, the second through hole 223 has an inverted circular truncated cone shape, and the inner circumference of the second through hole 223 forms an angle of 5 to 15 ° with the axis of the second through hole 223. With this arrangement, the table body 22 can contact with the side of the member to be weighed 10, and the hose 215 communicates with the side of the member to be weighed 10, so that the mass of the member to be weighed 10 can be adjusted.

The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, as for the system embodiment, since it is substantially similar to the method embodiment, the description is relatively simple, and reference may be made to the partial description of the method embodiment for relevant points.

The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. An electronic balance for outdoor work, comprising:

the bearing plate is used for placing a piece to be weighed;

2. The electronic balance for outdoor work according to claim 1, further comprising a base and a support;

3. The electronic balance for outdoor work of claim 2, wherein the inside of the table body is hollow to form a containing cavity, a first through hole is formed in the bottom surface of the table body, the supporting member penetrates through the first through hole to be connected with the bearing plate and the base respectively, a second through hole is formed in the top surface of the table body, and the radial cross-sectional area of the bearing plate is smaller than the opening area of the second through hole;

preferably, the number of the first through holes is at least two, and each of the first through holes accommodates at least one of the supporting members.

4. The electronic balance for outdoor use according to claim 3, wherein the elevating mechanism comprises an eccentric shaft, a connecting rod and a support base,

5. The electronic balance for outdoor work of claim 4, further comprising a guide rotation-preventing mechanism, wherein a third through hole is formed in the pressure plate, one end of the guide rotation-preventing mechanism penetrates through the third through hole to be connected with the platform body, and the other end of the guide rotation-preventing mechanism is arranged in a suspended manner relative to the base;

6. The electronic balance for outdoor work according to claim 5, wherein a baffle is arranged below the platform body, the baffle is arranged in the circumferential direction of the platform body, and the bottom end of the baffle is lower than the upper end face of the base and higher than the lower end face of the base.

7. The electronic balance for outdoor work of any one of claims 1 to 6, further comprising a precision pump and a hose connected thereto, wherein a free end of the hose is disposed above the table body and connected to a connector fixed to the table body, and the table body is raised so that the hose communicates with the adjustment port of the member to be weighed through the connector.

8. The electronic balance for outdoor work according to claim 7, wherein a liquid inlet channel is arranged in the bearing plate, a liquid inlet and outlet is arranged above the bearing plate, the liquid inlet and outlet is communicated with a member to be weighed, which is placed on the bearing plate, and the liquid inlet channel is communicated with the bidirectional pump and the liquid inlet and outlet.

9. The electronic balance for outdoor use according to claim 8, wherein the precision pump is provided in the bearing plate and communicates with the liquid inlet passage.

10. The electronic balance for outdoor operation according to any one of claims 3 to 6, wherein the second through hole has an inverted truncated cone shape, and an angle formed between an inner periphery of the second through hole and an axis of the second through hole is 5 to 15 °.