Detachable dust-free mortar dust emission amount detection device

Abstract

The utility model discloses a detachable dust-free mortar dust emission amount detection device which comprises a base, a rotary driving mechanism is installed in the base, the top end of a rotary shaft of the rotary driving mechanism extends out of the top face of a top plate of the base and is fixedly provided with a connecting block, and a lower cylinder is detachably fixed to the connecting block. A connecting ring body is installed above the base, the upper portion of the lower cylinder is inserted into the connecting ring body in a sleeved mode, internal threads are formed on the inner side wall of the top of the connecting ring body, the lower portion of the upper cylinder is located in the connecting ring body, the outer side wall of the upper cylinder is in threaded connection with the internal threads formed on the inner side wall of the upper portion of the connecting ring body, and the upper portion of the lower cylinder is inserted into the lower portion of the upper cylinder. Dust-free mortar to be detected is placed in the lower cylinder; and a dust tester is fixed on the top surface of a top plate of the upper cylinder. The device can detect the dust emission amount of the dust-free mortar, is used for assisting the development and research of the dust-free mortar, and is convenient to disassemble, assemble, clean and maintain.

Description

Technical fields:

[0001] This utility model relates to the field of building material testing technology, and more specifically to a detachable dust-free mortar dust emission testing device. Background technology:

[0002] Currently, dry-mixed mortar inevitably produces dust during production, transportation, and use, which is released into the air, polluting the environment and seriously harming workers' health. Therefore, dust-free mortar has emerged. Dust-free mortar refers to dry-mixed mortar with the addition of a dust suppressant, which greatly inhibits dust emission without reducing mortar performance. However, in the research and development of dust-free mortar, there are currently no clear testing tools to determine the amount of dust emitted, resulting in the inability to specifically quantify the dust suppression ability of dust-free mortar. Utility model content:

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a detachable dust-free mortar dust emission detection device. It can detect the dust emission of dust-free mortar, which can be used to assist in the development and research of dust-free mortar. Moreover, it is easy to disassemble and install, and convenient to clean and maintain.

[0004] The solution of this utility model to the aforementioned technical problem is:

[0005] A detachable dust-free mortar dust emission detection device includes a base, in which a rotary drive mechanism is installed. The top end of the rotary drive mechanism's rotating shaft extends out of the top surface of the base's top plate and is fixed with a connecting block. A lower cylinder is detachably fixed to the connecting block. A connecting ring is installed above the base. The upper part of the lower cylinder is inserted into the connecting ring. An internal thread is formed on the inner sidewall of the top of the connecting ring. The lower part of the upper cylinder is located in the connecting ring, and its outer sidewall is screwed onto the internal thread formed on the inner sidewall of the upper part of the connecting ring. The upper part of the lower cylinder is inserted into the lower part of the upper cylinder.

[0006] The lower cylinder contains dust-free mortar to be tested;

[0007] A dust tester is fixed to the top surface of the top plate of the upper cylinder. The bottom of the sensing part of the dust tester passes through the bottom end of the through hole in the middle of the top plate of the upper cylinder and is located in the upper cylinder.

[0008] The rotary drive mechanism is a rotary motor, which is fixed on the bottom surface of the top plate of the base. The top of the rotary motor's rotating shaft extends out of the top surface of the top plate of the base and is fixed with a circular connecting block. The outer side wall of the connecting block is formed with an external thread, and the bottom surface of the lower cylinder is formed with a central concave hole. The inner side wall of the central concave hole is formed with an internal thread. The connecting block is located in the central concave hole, and its external thread is screwed onto the internal thread.

[0009] The top of the vertical rod has a through hole extending to the left and right. The lower left and right sides of the connecting ring body have transverse through holes extending to the left and right. The screw part of the fixing bolt is inserted into the corresponding through hole and transverse through hole. The outer end of the screw part of the fixing bolt extends out of the outer end of the transverse through hole and is fitted with a washer and screwed with a lock nut. The washer is clamped between the lock nut and the outer side wall of the connecting ring body.

[0010] The inner walls of the front and rear ends of the rotating part of the fixing bolt are formed with arc-shaped grooves, and the outer wall of the vertical rod is pressed against the inner arc-shaped wall of the corresponding arc-shaped groove.

[0011] The inner sidewall of the bottom end of the upper cylinder is formed with a radially extending ring, the upper part of the lower cylinder is inserted into the radially extending ring, and the outer sidewall of the upper part of the lower cylinder is close to the inner sidewall of the radially extending ring.

[0012] The outstanding effect of this utility model is:

[0013] Compared with existing technologies, it can detect the amount of dust emitted by dust-free mortar, which can be used to assist in the development and research of dust-free mortar. Moreover, it is easy to disassemble and install, and convenient to clean and maintain. Attached image description:

[0014] Figure 1 This is a partial sectional view of the present invention;

[0015] Figure 2 yes Figure 1 A magnified view of a portion of the image;

[0016] Figure 3 This is a partial sectional view of the fixing bolt. Detailed implementation method:

[0017] For example, see below. Figures 1 to 3 As shown, a detachable dust-free mortar dust emission detection device includes a base 10, in which a rotary drive mechanism is installed. The top end of the rotary drive mechanism's rotating shaft extends out of the top surface of the top plate of the base 10 and is fixed with a connecting block 11. A lower cylinder 20 is detachably fixed on the connecting block 11. A connecting ring 30 is installed above the base 10. The upper part of the lower cylinder 20 is inserted into the connecting ring 30. An internal thread is formed on the inner side wall of the top of the connecting ring 30. The lower part of the upper cylinder 40 is located in the connecting ring 30, and its outer side wall is screwed onto the internal thread formed on the inner side wall of the upper part of the connecting ring 30. The upper part of the lower cylinder 20 is inserted into the lower part of the upper cylinder 40.

[0018] The lower cylinder 20 contains dust-free mortar to be tested;

[0019] A dust tester 50 is fixed on the top surface of the top plate of the upper cylinder 40. The bottom of the sensing part 51 of the dust tester 50 passes through the bottom end of the middle through hole of the top plate of the upper cylinder 40 and is located in the upper cylinder 40.

[0020] Furthermore, the rotary drive mechanism is a rotary motor 12, which is fixed to the bottom surface of the top plate of the base 10. The top of the rotating shaft of the rotary motor 12 extends out of the top surface of the top plate of the base 10 and is fixed with a circular connecting block 11. The outer side wall of the connecting block 11 is formed with external threads, and the bottom surface of the lower cylinder 20 is formed with a central recessed hole. The inner side wall of the central recessed hole is formed with internal threads. The connecting block 11 is located in the central recessed hole, and its external thread is screwed onto the internal thread. The direction of rotation of the rotating shaft of the rotary motor 12 is the same as the direction of the external thread of the connecting block 11, and opposite to the direction of the internal thread of the central recessed hole, that is, opposite to the tightening direction of the central recessed hole. Therefore, when the rotary motor 12 is running, as the lower cylinder 20 rotates, it becomes tighter and tighter without loosening, ensuring normal drive rotation. Among them, a control button (which is a conventional structure and is not shown in the attached figure) is fixed on the top surface of the top plate of the base 10. It is electrically connected to the rotary motor 12 through an electrical connection wire. The electrical connection wire of the rotary motor 12 extends out of the base 10. When in use, the plug of the electrical connection wire can be inserted into the socket to achieve power supply. All of these are conventional structures and will not be described in detail here.

[0021] Furthermore, both the upper cylinder 40 and the lower cylinder 20 are transparent open cylinders, and their materials can be transparent materials such as PE, PP, PVC, and glass.

[0022] Furthermore, vertical rods 13 are fixed to the left and right sides of the top surface of the top plate of the base 10, and the connecting ring 30 is fixed to the upper part of the two vertical rods 13.

[0023] Furthermore, the top of the vertical rod 13 has a through hole extending horizontally at its center (in this embodiment, each vertical rod 13 has two through holes arranged vertically at its top, and two fixing bolts 60 need to be installed at each vertical rod 13). The lower left and right sides of the connecting ring 30 have horizontally extending through holes 31. The outer wall of the connecting ring 30 at the outer end of the horizontal through hole 31 is a vertical plane. The threaded portion of the fixing bolt 60 is inserted into the corresponding through hole and horizontal through hole 31. The outer end of the threaded portion of the fixing bolt 60 extends out of the outer end of the horizontal through hole 31 and is fitted with a washer 61 and screwed with a locking nut 62. The washer 61 is clamped between the locking nut 62 and the outer wall of the connecting ring 30. This structure allows the connecting ring 30 and the vertical rod 13 to form a detachable structure after the fixing bolt 60 is removed, facilitating cleaning and maintenance.

[0024] Furthermore, the inner walls of the front and rear ends of the rotating part of the fixing bolt 60 are formed with arc-shaped grooves, and the outer wall of the vertical rod 13 presses against the inner arc-shaped wall of the corresponding arc-shaped groove. This structure ensures that when the locking nut 62 is loosened and rotated during installation, the fixing bolt 60 will not rotate with it, making disassembly convenient.

[0025] Furthermore, a radially extending ring 41 is formed on the inner sidewall of the bottom end of the upper cylinder 40, and the upper part of the lower cylinder 20 is inserted into the radially extending ring 41, with the outer sidewall of the upper part of the lower cylinder 20 close to the inner sidewall of the radially extending ring 41.

[0026] Furthermore, an elastic ring 42 is fitted on the inner wall of the radially extending ring portion 41, and an upper radially extending edge 43 is formed on the outer wall of the top end of the elastic ring 42. The upper radially extending edge 43 presses against the top surface of the radially extending ring portion 41, and the inner wall of the elastic ring 42 is close to the upper outer wall of the lower cylinder 20 (with a small gap between them), thereby ensuring that the lower cylinder 20 can rotate normally.

[0027] Because of the small gap, the amount of volatile dust leaking out from between the upper cylinder 40 and the lower cylinder 20 can be reduced.

[0028] In use, this embodiment is as follows:

[0029] (1) Weigh 50-150g of the dust-free mortar to be tested and place it in the lower cylinder 20;

[0030] (2) Install the lower cylinder 20 onto the connecting block 11;

[0031] (3) Connect the upper cylinder 40, which has the dust tester 50 at the top, to the connecting ring 30 by thread;

[0032] (4) Turn on the dust tester 50 and record the initial dust concentration C1 in the cavity of the upper cylinder 40 (the dust tester 50 is a product that can be purchased directly on the market, and will not be described in detail here. Its electrical connection plug can be inserted into the socket to achieve power supply).

[0033] (5) Press the control button to make the rotary motor 12 run, making the lower cylinder 20 rotate, and start timing at the same time. Record the dust concentration in the cavity of the upper cylinder 40 every 30 seconds. Stop timing after recording 3-5 times, and take the average value of multiple records as the final dust concentration value C2.

[0034] (6) C = C2 - C1 is the dust concentration value of the dust-free mortar in the testing device. By calculating the volume V inside the dust tester, the dust emission amount of the dust-free mortar under test per unit time, Q = C * V'', can be obtained.

[0035] (7) After the test is completed, press the control button to stop the rotary motor 12. At the same time, turn off the dust tester 50, unplug the plug, remove the upper cylinder 40 and the lower cylinder 20 in sequence, and then disassemble all parts, clean them, and wait for the next use.

[0036] This embodiment is easy to operate, easy to clean, simple in structure, and easy to manufacture.

[0037] Finally, it should be noted that the above embodiments are merely representative examples of this utility model. Obviously, this utility model is not limited to the above embodiments and can have many variations. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model should be considered to fall within the protection scope of this utility model.

Claims

1. A detachable dust-free mortar dust emission detection device, comprising a base (10), characterized in that: A rotary drive mechanism is installed in the base (10). The top end of the rotary drive mechanism's rotating shaft extends out of the top surface of the top plate of the base (10) and is fixed with a connecting block (11). The lower cylinder (20) is detachably fixed to the connecting block (11). A connecting ring (30) is installed above the base (10). The upper part of the lower cylinder (20) is inserted into the connecting ring (30). An internal thread is formed on the inner side wall of the top of the connecting ring (30). The lower part of the upper cylinder (40) is located in the connecting ring (30), and its outer side wall is screwed onto the internal thread formed on the inner side wall of the upper part of the connecting ring (30). The upper part of the lower cylinder (20) is inserted into the lower part of the upper cylinder (40). The dust-free mortar to be tested is placed in the lower cylinder (20); A dust tester (50) is fixed on the top surface of the top plate of the upper cylinder (40). The bottom of the sensing part (51) of the dust tester (50) passes through the bottom end of the middle through hole of the top plate of the upper cylinder (40) and is located in the upper cylinder (40).

2. The detachable dust-free mortar dust emission detection device according to claim 1, characterized in that: The rotary drive mechanism is a rotary motor (12). The rotary motor (12) is fixed on the bottom surface of the top plate of the base (10). The top of the rotating shaft of the rotary motor (12) extends out of the top surface of the top plate of the base (10) and is fixed with a circular connecting block (11). The outer side wall of the connecting block (11) is formed with an external thread. The bottom surface of the lower cylinder (20) is formed with a central concave hole. The inner side wall of the central concave hole is formed with an internal thread. The connecting block (11) is located in the central concave hole, and its external thread is screwed onto the internal thread.

3. The detachable dust-free mortar dust emission detection device according to claim 1, characterized in that: Both the upper cylinder (40) and the lower cylinder (20) are transparent cylinders.

4. The detachable dust-free mortar dust emission detection device according to claim 1, characterized in that: Vertical rods (13) are fixed to the left and right sides of the top surface of the top plate of the base (10), and the connecting ring (30) is fixed to the upper part of the two vertical rods (13).

5. The detachable dust-free mortar dust emission detection device according to claim 3, characterized in that: The top of the vertical rod (13) has a through hole extending to the left and right. The lower left and right sides of the connecting ring (30) have transverse through holes (31) extending to the left and right. The screw part of the fixing bolt (60) is inserted into the corresponding through hole and transverse through hole (31). The outer end of the screw part of the fixing bolt (60) extends out of the outer end of the transverse through hole (31) and is fitted with a washer (61) and screwed with a lock nut (62). The washer (61) is clamped between the lock nut (62) and the outer side wall of the connecting ring (30).

6. The detachable dust-free mortar dust emission detection device according to claim 5, characterized in that: The inner sidewalls of the front and rear ends of the rotating part of the fixing bolt (60) are formed with arc-shaped grooves, and the outer sidewall of the vertical rod (13) presses against the inner arc-shaped wall surface of the corresponding arc-shaped groove.

7. The detachable dust-free mortar dust emission detection device according to claim 1, characterized in that: The inner sidewall of the bottom end of the upper cylinder (40) is formed with a radially extending ring (41), the upper part of the lower cylinder (20) is inserted into the radially extending ring (41), and the outer sidewall of the upper part of the lower cylinder (20) is close to the inner sidewall of the radially extending ring (41).

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