Combustion ignition switch-on device of building material product combustion heat value tester

Abstract

The utility model relates to a building material combustion detection instrument, in particular to a combustion ignition switching-on device of a building material product combustion heat value tester. It can be ensured that test ignition succeeds at a time, and the problems of inconvenience, time consuming and labor consuming of multiple times of ignition are solved. Comprising a guide rod, the bottom end of which is provided with an inner chamber. And the top of the connecting screw extends into the inner cavity of the guide rod and is in threaded connection with the inner cavity of the guide rod. And the locking nut is arranged on the connection screw, is in threaded connection with the connection screw, and is used for fixing the position of the connection screw and preventing loosening. The guide sleeve is provided with a threaded outer wall and an inner cavity with the through length, and the top of the guide rod penetrates through the inner cavity of the guide sleeve and is connected with the terminal screw. The connecting nut sleeves the bottom of the guide sleeve and is in threaded connection with the guide sleeve to form a containing cavity for containing part of the guide rod, and a shaft shoulder is arranged in the middle of the guide rod and limited in the containing cavity. And the spring is arranged in the accommodating cavity above the shaft shoulder of the guide rod, is wound on the guide rod and is limited to move in the guide sleeve.

Description

Technical Field

[0001] The utility model relates to a building material combustion detection instrument, in particular to a combustion ignition connection device of a building material product combustion calorific value determination instrument. Background Art

[0002] The combustion calorific value test instrument for building materials is one of the contents of the grading evaluation of combustion detection of building energy-saving materials. In addition, the national standard GB50411-2019 "Construction Quality Acceptance Code for Energy-Saving Engineering Projects" promulgated by my country clearly requires that the combustion performance of building energy-saving materials be tested as the main control item.

[0003] However, the combustion calorific value test instruments for building materials currently used in laboratories often fail to ignite during combustion tests, and generally require multiple ignitions to complete the test. This is time-consuming and labor-intensive, has a great impact on the detection of the combustion calorific value, and can easily cause damage to accessories in serious cases, thus causing great trouble to the test operators. Summary of the invention

[0004] The utility model aims at the defects of the prior art and provides a combustion ignition connection device for a combustion calorific value tester of building materials products, which can ensure the success of the test ignition once and overcome the inconvenience, time-consuming and labor-intensive problems of multiple ignitions.

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

[0006] The guide rod has an inner chamber at its bottom end.

[0007] The screw is connected, and the top of the screw extends into the inner chamber of the guide rod and is connected with the thread of the inner chamber of the guide rod.

[0008] The locking nut is arranged on the connecting screw and is threadedly connected with the connecting screw to fix the position of the connecting screw to prevent it from loosening.

[0009] The guide sleeve has a threaded outer wall and an inner cavity with a through length. The top of the guide rod passes through the inner cavity of the guide sleeve and is connected to the terminal screw.

[0010] The connecting nut is sleeved on the bottom of the guide sleeve and is threadedly connected with the guide sleeve to form an accommodating cavity for accommodating part of the guide rod, wherein a shaft shoulder is provided in the middle of the guide rod to be restricted in the accommodating cavity.

[0011] The spring is arranged in the accommodating cavity above the guide rod shoulder, is wound on the guide rod and is limited to move in the guide sleeve.

[0012] When the device contacts the oxygen bomb and closes the snap door, the guide rod moves upward under the elastic action of the spring, and the connecting screw presses the oxygen bomb device to connect the current path, so as to facilitate a successful ignition test.

[0013] Furthermore, the top of the connector screw is threadably connected to the internal thread of the inner chamber of the guide rod through an external thread.

[0014] Furthermore, the locking nut is tightened with the external thread of the connecting screw by utilizing the internal thread.

[0015] Furthermore, the longitudinal section of the guide sleeve is T-shaped. When in use, after the bottom of the T-shaped guide sleeve passes through the through hole of the buckle cover, the bottom is locked and connected with a connecting nut.

[0016] Furthermore, the top end of the spring abuts against the top wall of the accommodating cavity, and the bottom end of the spring abuts against the shaft shoulder.

[0017] Furthermore, the terminal screw is connected to the top of the guide rod and is electrically insulated by a washer, so as to safely connect the power line for ignition.

[0018] Compared with the prior art, the utility model has beneficial effects.

[0019] The utility model significantly improves the ignition success rate in the combustion calorific value test of building materials and has the advantages of compact structure, simple operation, convenience and reliability, easy maintenance, etc., and is particularly suitable for laboratory testing of combustion calorific value instruments of building materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods. The protection scope of the utility model is not limited to the following descriptions.

[0021] Figure 1 This is a schematic diagram of the front cover of the calorific value instrument when the ignition connection device is in use.

[0022] Figure 2 This is a schematic diagram of the calorific value instrument box cover when the ignition connection device is in use.

[0023] Figure 3 It is an enlarged schematic diagram of the connection of the ignition connection device and the oxygen bomb device.

[0024] Figure 4 It is a structural schematic diagram of an ignition connection device in a specific embodiment. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and beneficial effects of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all of the embodiments.

[0026] like Figure 1-4As shown, the ignition connection device includes a guide rod 5, a connection screw 1, a locking nut 2, a guide sleeve 6, a connecting nut 7, a spring 8, a terminal screw 3, a washer 4, a buckle cover 9, an ignition connection device 10, an oxygen bomb device 11, a calorific value instrument 12, and a power cord 13. Among them:

[0027] The guide rod 5 has an inner chamber at its bottom end.

[0028] The screw 1 is connected, and its top extends into the inner chamber of the guide rod 5 and is connected with the inner chamber thread of the guide rod.

[0029] The locking nut 2 is arranged on the connecting screw 1 and is threadedly connected with the connecting screw 1 to fix the position of the connecting screw 1 to prevent it from loosening. The top of the connecting screw 1 is threadedly connected with the internal thread of the inner chamber of the guide rod 5 through the external thread. The locking nut 2 is tightened with the external thread of the connecting screw 1 by using the internal thread.

[0030] The guide sleeve 6 has a threaded outer wall and an inner cavity with a through length. The top of the guide rod 5 passes through the inner cavity of the guide sleeve 6 and is connected to the terminal screw 3. The terminal screw 3 is connected to the top of the guide rod 5 and is electrically insulated by the washer 4. This allows for safe connection of the power cord for ignition. The longitudinal section of the guide sleeve 6 is T-shaped. When in use, after the bottom of the T-shaped guide sleeve 6 passes through the through hole of the buckle cover, the bottom is locked and connected with a connecting nut 7.

[0031] The connecting nut 7 is sleeved on the bottom of the guide sleeve 6 and is threadedly connected with the guide sleeve to form an accommodating cavity for accommodating part of the guide rod, wherein the middle part of the guide rod 5 is provided with a shaft shoulder to be restricted in the accommodating cavity.

[0032] The spring is arranged in the accommodating cavity above the shoulder of the guide rod 5, is wound on the guide rod 5 and is limited to move in the guide sleeve 6. The top end of the spring 8 abuts against the top wall in the accommodating cavity, and the bottom end of the spring 8 abuts against the shoulder.

[0033] When the device contacts the oxygen bomb and closes the snap door, the guide rod 5 moves upward under the elastic action of the spring 8, and the screw 1 is connected to press the oxygen bomb device, so as to connect the current path and facilitate a successful ignition test.

[0034] Example 1, connection relationship and technical description are as follows:

[0035] 1. An inner chamber is formed at the bottom of the guide rod 5, and the top of the connecting screw 1 extends into the inner chamber, and the two are connected by threads; and a locking nut 2 is arranged on the connecting screw 1 for locking. The connecting screw 1 engages with the corresponding inner thread of the inner chamber of the guide rod 5 through its outer thread, forming an adjustable mechanical connection. The connecting screw 1 is allowed to move up and down (tighten or loosen) in the guide rod. The locking nut 2 is arranged on the connecting screw 1 to fix the position of the connecting screw 1 to prevent the connecting screw 1 from loosening due to vibration or external force.

[0036] During specific operation, the locking nut 2 is matched with the external thread of the connection screw through its internal thread and is tightened, applying a reverse torque to the screw, thereby achieving a locking effect.

[0037] By adjusting the length of the connecting screw 1 and fixing it with the locking nut 2, it is possible to adapt to oxygen bomb devices of different sizes or pressure requirements, thereby improving the versatility and flexibility of the device.

[0038] Second, the top of the guide rod 5 passes through the inner cavity of the guide sleeve with a T-shaped cross-section, and the top end that passes through is connected to a terminal screw 3 for connecting a power line, and a washer 4 is arranged between the terminal screw 3 and the top end.

[0039] 3. A shoulder is provided in the middle of the guide rod 5; a thread is provided on the outer wall of the guide sleeve, and the connecting nut 7 is sleeved on the bottom of the guide sleeve 6 and is threadedly connected with the guide sleeve 6 to form an accommodating cavity, through which the guide rod 5 passes, and the shoulder of the guide rod 5 is limited in the accommodating cavity. The combined design of the guide sleeve 6 and the connecting nut 7 ensures a stable connection between the device and the buckle cover of the test instrument, and can maintain a stable position of the ignition connection device even under repeated opening and closing operations.

[0040] A spring 8 is disposed on the guide rod jacket above the guide rod 5 shoulder in the accommodating cavity. The application of the spring 8 not only provides the power to push the connection screw 1 upward, but also can automatically adjust according to the specific position of the oxygen bomb device to ensure the reliability and repeatability of the electrical contact in each test.

[0041] Example 2, instructions for use:

[0042] 1. If Figure 1 As shown, the entire device is fixed to the inner side of the buckle cover of the instrument through a guide sleeve 6 and a connecting nut 7 to ensure that the ignition connection device and the buckle cover cannot be loosened when the buckle cover is opened and closed.

[0043] Second, the connecting nut 7 is a cylindrical sleeve structure, with a round hole at the bottom and an internal thread at the top. The guide rod 5 is limited by the connecting nut 7 through the shaft shoulder to move in the guide sleeve 6. The spring is limited by the guide rod to move in the guide sleeve.

[0044] 3. The connecting screw 1 is a large round head knurled structure, which is connected to the lower part of the guide rod 5. (According to the tight contact between the ignition connecting device and the oxygen bomb after closing the buckle door), adjust the connecting screw 1 to a suitable length and then lock it with the locking nut 2 to prevent the connecting screw from loosening due to multiple experiments.

[0045] 4. The oxygen bomb is a closed pressure-resistant device used to hold the test material. Before the test, the test material is loaded into the oxygen bomb as required and the lid is tightened. Then, the oxygen at the specified pressure is filled in and the door is closed (such as Figure 2 , Figure 3As shown in the figure): the guide rod 5 can move up and down along the guide sleeve 6. The guide rod 5 compresses the spring and moves upward, so that the connection screw 1, under the action of the spring, presses the oxygen bomb device and contacts the upper end of the oxygen bomb closely, thereby conducting current into the oxygen bomb and completing the combustion test and ignition.

[0046] 5. The terminal screw 3 and the washer are made of brass material, which presses the power cord terminal firmly and reliably; the power cord is connected to a 24V safety voltage and is used for ignition power supply for combustion tests.

[0047] The guide sleeve 6 and the connecting nut 7 are made of nylon, and have the characteristics of light weight, firmness, corrosion resistance, good insulation performance, low friction coefficient, etc.

[0048] The guide rod 5 is made of brass and has the characteristics of being strong, corrosion-resistant, having good electrical conductivity and having a low friction coefficient.

[0049] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features thereof may be replaced by equivalents. Therefore, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope defined by the claims of the present invention.

Claims

1. Combustion ignition connection device for building material product combustion calorific value tester, characterized in that: include: A guide rod (5) having an inner chamber formed at its bottom end; The screw (1) is connected, and its top portion extends into the inner chamber of the guide rod (5) and is threadedly connected to the inner chamber of the guide rod; A locking nut (2) is disposed on the connecting screw (1) and is threadedly connected to the connecting screw (1) to fix the position of the connecting screw (1) to prevent it from loosening; A guide sleeve (6) having a threaded outer wall and an inner cavity with a through length, wherein the top of the guide rod (5) passes through the inner cavity of the guide sleeve and is connected to the terminal screw (3); A connecting nut (7) is sleeved on the bottom of the guide sleeve (6) and is threadedly connected to the guide sleeve to form an accommodating cavity for accommodating part of the guide rod (5), wherein a shaft shoulder is provided in the middle of the guide rod to be confined in the accommodating cavity; The spring (8) is arranged in a receiving cavity above the shaft shoulder of the guide rod (5), is wound around the guide rod and is limited in movement within the guide sleeve (6).

2. The combustion ignition connection device for the combustion calorific value measuring instrument of building materials products according to claim 1 is characterized in that: The top of the connecting screw (1) is threadably connected to the internal thread of the inner chamber of the guide rod through an external thread.

3. The combustion ignition connection device for the combustion calorific value measuring instrument of building materials products according to claim 1 is characterized in that: The locking nut (2) is screwed together with the external thread of the connecting screw by means of the internal thread.

4. The combustion ignition connection device for the combustion calorific value measuring instrument of building materials products according to claim 1 is characterized in that: The longitudinal section of the guide sleeve (6) is T-shaped.

5. The combustion ignition connection device for the combustion calorific value measuring instrument of building materials products according to claim 1 is characterized in that: The top end of the spring abuts against the top wall in the accommodating cavity, and the bottom end of the spring abuts against the shaft shoulder.

6. The combustion ignition connection device for the combustion calorific value measuring instrument of building materials products according to claim 1, characterized in that: The terminal screw (3) is connected to the top end of the guide rod (5).

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