Low background alpha and beta measuring instrument

Abstract

The utility model relates to the technical field of radiation monitoring, in particular to a low-background alpha and beta measuring instrument which comprises a measuring machine body, four walking pulleys used for movably supporting the measuring machine body are symmetrically arranged at the bottom end of the measuring machine body, and a bottom cavity and a right-angle cavity channel which are communicated are formed in the lower end of the measuring machine body. The measuring machine body is provided with a loading mechanism used for fixing and supporting the measuring machine body through the bottom cavity and the right-angle cavity channel. The measuring machine body with the vertical cabinet structure is arranged, and the walking pulleys are symmetrically arranged at the bottom end of the measuring machine body, so that the measuring machine body can conveniently, stably and horizontally move through the walking pulleys; a bottom cavity and a right-angle cavity channel which are communicated with each other are formed in a measuring machine body to drive a lifting support to do reciprocating lifting movement, meanwhile, a driving wedge block and a driven wedge block which movably abut against each other are arranged in the right-angle cavity channel, so that the driven wedge block provided with a strong support stretches out and draws back repeatedly under the driving action of a driving motor, and therefore fixed supporting is provided for the measuring machine body.

Description

Technical Field

[0001] The utility model relates to the technical field of radiation monitoring, in particular to a low-background α, β measuring instrument. Background Art

[0002] The two-channel low-background αβ measuring instrument has two independent low-background αβ main detectors, which can measure two samples simultaneously and respectively give the total α and total β activity concentration measurements in the two samples. It can be used for the measurement of the total activity of αβ in the fields of radiation protection, environmental samples, drinking water, medical and health, agricultural science, nuclear power plants, reactors, isotope production, geological exploration, institutions of higher learning, scientific research, etc.

[0003] Existing low-background α, β measuring instruments, such as a new type of low-background α, β measuring instrument disclosed in the patent publication number CN211505907U, have universal brake wheels installed at the four corners of the lower part of the steel shell. A handle is installed on the side of the steel shell, and a through hole for cooperating with the lead chamber is opened on the side of the steel shell. This allows only the universal brake wheels to provide support for the measuring instrument. However, the usage environment of the measuring instrument is variable, and high stability needs to be ensured during use. If it is difficult to firmly limit and fix the measuring instrument, it will seriously affect the normal use of the measuring instrument. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the problem of inconvenient use of measuring instruments with a single structural form in the prior art, and to propose a low-background α, β measuring instrument.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A low-background α, β measuring instrument includes a measuring body. Four walking wheels for movably supporting the measuring body are symmetrically arranged at the bottom end of the measuring body. A bottom cavity and a right-angle cavity are opened and communicated with each other in the lower part of the measuring body. The measuring body is provided with a load-bearing mechanism for fixedly supporting the measuring body through the bottom cavity and the right-angle cavity.

[0007] Preferably, the right-angle cavities are symmetrically opened on the left and right sides of the bottom cavity, and the right-angle cavity is composed of a horizontal section and a vertical section.

[0008] Preferably, a limiting chute is opened in the horizontal section of the right-angle cavity.

[0009] Preferably, the load-bearing mechanism includes a driving motor fixedly installed on the measuring body, and a ball screw rotatably installed in the bottom cavity and fixedly connected to the output end of the driving motor. A lifting nut is arranged on the ball screw in a matching manner. An integrated lifting bracket is connected to the lifting nut and is slidably sleeved in the bottom cavity. A driving wedge block slidably sleeved in the limit chute and actively pulled by the lifting bracket is arranged in the limit chute. A driven wedge block slidably abutted against the driving wedge block is slidably sleeved in the longitudinal section of the right-angle cavity. A limit flange is integrally connected to the driven wedge block. A guiding rod slidably penetrating through the limit flange is welded in the longitudinal section of the right-angle cavity, and a return spring is welded between the right-angle cavity and the limit flange. A strong support is integrally arranged on the driven wedge block.

[0010] Preferably, a traction connecting rod is connected between the lifting bracket and the driving wedge block by a pin shaft.

[0011] Preferably, the return spring is sleeved on the guiding rod.

[0012] Compared with the prior art, the present utility model has the following advantages:

[0013] 1. The present utility model provides a measuring body with a cabinet structure, and walking wheels are symmetrically arranged at the bottom end of the measuring body, so that the measuring body can be conveniently and stably moved horizontally through the walking wheels.

[0014] 2. The present utility model provides a communicating bottom cavity and a right-angle cavity in the measuring body. By arranging a ball screw driven by a driving motor in the bottom cavity to drive the reciprocating lifting movement of the lifting bracket, and at the same time arranging a driving wedge block and a driven wedge block in the right-angle cavity to actively abut against each other, the driven wedge block installed with the strong support can be repeatedly telescoped under the driving action of the driving motor, so as to provide a fixed support for the measuring body. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural view of a low-background α, β measuring instrument proposed by the present utility model;

[0016] Figure 2 is a bottom view of a low-background α, β measuring instrument proposed by the present utility model;

[0017] Figure 3 is a front sectional view of a low-background α, β measuring instrument proposed by the present utility model;

[0018] Figure 4 is an enlarged schematic view of the structure of part A of a low-background α, β measuring instrument proposed by the present utility model;

[0019] Figure 5 is a side sectional view of a low-background α, β measuring instrument proposed by the present utility model;

[0020] Figure 6 Schematic diagram of the load-bearing mechanism structure of a low-background α, β measuring instrument proposed by the present utility model.

[0021] In the figure: 1, measuring body; 2, traveling pulley; 3, bottom cavity; 4, right-angle cavity; 5, limit chute; 6, drive motor; 7, ball screw; 8, lifting nut; 9, lifting bracket; 10, drive wedge; 11, traction connecting rod; 12, driven wedge; 13, limit flange; 14, guide rod; 15, return spring; 16, strong support. Specific implementation mode

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0023] Refer to Figures 1-6 , a low-background α, β measuring instrument, including a measuring body 1. The measuring body 1 adopts a box body disclosed in the publication number CN211478663U. Four traveling pulleys 2 for movably supporting the measuring body 1 are symmetrically arranged at the bottom end of the measuring body 1 to provide movable support for the measuring body 1 by means of the traveling pulleys 2. A bottom cavity 3 and a right-angle cavity 4 that are connected and communicated are opened in the lower end of the measuring body 1 to provide a telescopic space for the driven wedge 12 and the strong support 16 that fixedly support the measuring body 1 by means of the right-angle cavity 4.

[0024] The measuring body 1 is provided with a load-bearing mechanism for fixedly supporting the measuring body 1 through the bottom cavity 3 and the right-angle cavity 4. Specifically, refer to the attached Figure 3 - attached Figure 6 , the load-bearing mechanism includes a drive motor 6 fixedly installed on the measuring body 1, and a ball screw 7 rotatably installed in the bottom cavity 3 and fixedly connected to the output end of the drive motor 6. A lifting nut 8 is arranged on the ball screw 7 in a matching manner. A lifting bracket 9 slidably sleeved in the bottom cavity 3 is integrally connected to the lifting nut 8. A guide groove structure for slidably sleeving the lifting bracket 9 is vertically opened in the bottom cavity 3. Under the limiting action of the lifting bracket 9, the lifting nut 8 driven by the ball screw 7 moves up and down.

[0025] A driving wedge block 10 is slidably sleeved in a limit sliding groove 5 and is movably towed by a lifting bracket 9. A driven wedge block 12 which slidably abuts against the driving wedge block 10 is slidably sleeved in the longitudinal section of a right-angle channel 4. A limit flange 13 is integrally connected to the driven wedge block 12. A guide rod 14 which slidably penetrates through the limit flange 13 is welded in the longitudinal section of the right-angle channel 4. A return spring 15 is welded between the right-angle channel 4 and the limit flange 13. A strong support 16 is integrally arranged on the driven wedge block 12. Under the tension of the return spring 15, the driven wedge block 12 drives the strong support 16 to have a tendency to contract upward. When the driven wedge block 12 is extruded by the driving wedge block 10, the return spring 15 is forced to contract, and the driven wedge block 12 drives the strong support 16 to move vertically downward.

[0026] When the strong support 16 contacts the ground, the traveling pulley 2 leaves the ground, and the strong support 16 is used to provide a fixed support for the measuring body 1.

[0027] The right-angle channels 4 are symmetrically arranged on the left and right sides of the bottom cavity 3, and each right-angle channel 4 is composed of a transverse section and a longitudinal section. For details, refer to the attached Figure 5 description, so that the driving wedge block 10 and the driven wedge block 12 are distributed horizontally and vertically.

[0028] A limit sliding groove 5 is arranged in the transverse section of the right-angle channel 4 to provide a guiding and limiting function for the driving wedge block 10.

[0029] A traction connecting rod 11 is pin-connected between the lifting bracket 9 and the driving wedge block 10.

[0030] The return spring 15 is sleeved on the guide rod 14 to ensure that the return spring 15 performs linear telescopic movement during the force application process of the driven wedge block 12.

[0031] It should be noted that the specific model and specification of the driving motor 6 need to be selected according to the actual specifications of the device, etc. The specific selection calculation method adopts the existing technology in the field, so it will not be elaborated here.

[0032] The functional principle of the present utility model can be described through the following operation modes:

[0033] The traveling pulley 2 is used to provide a movable support for the measuring body 1. When it is necessary to fix the measuring body 1, the driving motor 6 is controlled to start;

[0034] The output end of the driving motor 6 drives the ball screw 7 to rotate. Under the guiding action of the lifting bracket 9, the lifting nut 8 moves upward. The lifting bracket 9 reversely extrudes the two driving wedge blocks 10 through the traction connecting rod 11. The driving wedge blocks 10 extrude the driven wedge block 12, and at the same time, the return spring 15 is forced to contract;

[0035] The driven wedge block 12 extending downward along the guide rod 14 drives the strong support 16 to move until the strong support 16 contacts the ground, thereby fixing the measuring body 1.

[0036] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A low-background α, β measuring instrument, comprising a measuring body (1), characterized in that, Four traveling pulleys (2) for movably supporting the measuring body (1) are symmetrically arranged at the bottom end of the measuring body (1), and a bottom cavity (3) and a right-angle channel (4) that are connected and communicate with each other are opened in the lower end of the measuring body (1). The measuring body (1) is provided with a load-bearing mechanism for fixedly supporting the measuring body (1) through the bottom cavity (3) and the right-angle channel (4).

2. The low-background α, β measuring instrument according to claim 1, characterized in that, The right-angle channels (4) are symmetrically opened on the left and right sides of the bottom cavity (3), and the right-angle channels (4) are composed of a horizontal section and a vertical section.

3. A low-background α, β measuring instrument according to claim 2, characterized in that, A limiting chute (5) is opened in the horizontal section of the right-angle channel (4).

4. A low-background α, β measuring instrument according to claim 3, characterized in that, The load-bearing mechanism includes a driving motor (6) fixedly installed on the measuring body (1), and a ball screw (7) rotatably installed in the bottom cavity (3) and fixedly connected to the output end of the driving motor (6). A lifting nut (8) is arranged on the ball screw (7) in a matching manner. A lifting bracket (9) that is slidably sleeved in the bottom cavity (3) is integrally connected to the lifting nut (8). A driving wedge block (10) that is movably pulled by the lifting bracket (9) is slidably sleeved in the limiting chute (5). A driven wedge block (12) that slidably abuts against the driving wedge block (10) is slidably sleeved in the vertical section of the right-angle channel (4). A limiting flange (13) is integrally connected to the driven wedge block (12). A guide rod (14) that slidably penetrates through the limiting flange (13) is welded in the vertical section of the right-angle channel (4). A return spring (15) is welded between the right-angle channel (4) and the limiting flange (13). A strong support (16) is integrally arranged on the driven wedge block (12).

5. A low-background α, β measuring instrument according to claim 4, characterized in that, A traction connecting rod (11) is pin-connected between the lifting bracket (9) and the driving wedge block (10).

6. A low-background α, β measuring instrument according to claim 4, characterized in that, The return spring (15) is sleeved on the guide rod (14).

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