Combustion experiment sampling device

Abstract

The utility model provides a combustion experiment sampling device, and belongs to the technical field of combustion experiment devices. The device comprises a base, a sample injection cavity and a magnetic type moving assembly, the sample injection cavity is fixed to the base, one end of the sample injection cavity is communicated to a combustion chamber, and the other parts of the sample injection cavity are closed; the magnetic attraction type moving assembly comprises a magnet and a sample frame, the magnet is in sliding connection with the base, the sample frame is located in the sample injection cavity, the magnet is located outside the sample injection cavity, and the magnet and the sample frame are magnetically attracted. According to the device, when the sample in the sample cavity is pushed, no hole or stroke groove for assisting the sample to move is formed in the wall of the sample injection cavity, external air and moisture are not easily introduced into the sample cavity, the interference of the sample injection process on a combustion experiment is very small, and the magnetic attraction type connection is stable; the device has the effects of stable sample propulsion, easy propulsion process control and convenient operation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of combustion experiment devices, in particular to a combustion experiment sample feeding device. BACKGROUND

[0002] A combustion experiment is a test for evaluating the composition or combustion performance of a sample by combustion, for example, the combustion test is used to determine the flame resistance of certain flame-resistant rubber products, and the flame resistance of materials also needs to be determined by combustion experiment.

[0003] When performing a combustion experiment, the sample to be burned for detection needs to be fixed to the burning point for combustion. A common problem in current combustion experiments is that when the sample to be burned is long or large, the sample needs to be pushed to the burning point as the combustion process progresses. It is difficult to push the sample as the combustion process progresses by directly fixing the sample in the combustion chamber. Another method is to fix the sample on a clamp, with one end of the clamp near the burning point and the other end extending out of the combustion chamber for fixation. When the sample needs to be pushed, the experimenter manually changes the fixation position of the clamp to complete the pushing of the sample. This method is time-consuming to operate and can cause strong shaking of the sample, affecting the judgment of the sample curling, carbon deposition, and dripping phenomenon after combustion.

[0004] A clamp device for horizontal and vertical combustion experiment instruments was authorized on August 29, 2023, with the announcement number CN 219599227 U. The clamp can change its position as the combustion process progresses by rotating the forward and reverse screw to move the position of the movable box, so that the sample is always above the burning point. However, this device is still not convenient for pushing the sample to the burning point. A magnesium strip combustion experiment teaching table was authorized on November 28, 2017, with the announcement number CN 206676399 U. The device can push the sample to the burning point as the combustion process progresses, but the device has the problems of complex operation, high cost, and only suitable for thin sheet samples. Therefore, the inventors believe that it is necessary to design a combustion experiment sample feeding device that can stably push the sample and is easy to operate to solve the current difficulties faced by combustion experiments. CONTENT OF THE UTILITY MODEL

[0005] In order to improve the defects in the prior art when pushing the sample to be burned as the combustion experiment progresses, the purpose of the present application is to provide a combustion experiment sample feeding device that can stably push the sample in a closed sample feeding cavity, the pushing process is easy to control, the operation is convenient, and the interference with the combustion experiment is small.

[0006] In order to achieve the purpose of the present application, the combustion experiment sample feeding device provided by the present application adopts the following technical solution:

[0007] The application discloses a sample feeding device for combustion experiment, which comprises a base, a sample feeding cavity fixed to the base, the sample feeding cavity being communicated with a combustion chamber at one end and being closed at the other end, and a magnetic moving assembly comprising a magnet and a sample holder, the magnet being slidably connected with the base, the sample holder being located in the sample feeding cavity, and the magnet being located outside the sample feeding cavity and magnetically attracted to the sample holder.

[0008] In the above technical solution, the sample holder and the magnet are magnetically attracted to each other in the sample feeding cavity, when the magnet outside the sample feeding cavity slides on the base towards the combustion chamber, the sample holder magnetically attracted to the magnet in the sample feeding cavity is simultaneously moved towards the combustion chamber, so that the sample fixed to the sample holder can be pushed towards the combustion chamber. More importantly, the sample feeding device does not need to open any hole or stroke groove on the wall of the sample feeding cavity for assisting the movement of the sample, but uses magnetic induction to push the sample holder in the sample feeding cavity, which greatly reduces the possibility that the moisture in the air outside the sample feeding cavity contacts the sample and enters the combustion chamber with the sample.

[0009] Further, the sample feeding cavity comprises a first cavity and a second cavity, the first cavity and the second cavity are sequentially arranged in the direction towards the combustion chamber, the first cavity and the second cavity are communicated and the center axes thereof are collinear, one end of the second cavity extends into the combustion chamber, and the other end of the second cavity is detachably and airtightly connected with the first cavity.

[0010] When the sample is replaced during the combustion experiment, the open end of the second cavity is located in the combustion chamber, and the sample holder is fixed with the sample from the port of the second cavity. In the further technical solution, the detachable and airtight connection part of the first cavity and the second cavity can be opened, the sample holder is pushed to the connection part to fix the sample, and then the first cavity and the second cavity are reconnected. Thus, the operation of fixing the sample on the sample holder can be completed without withdrawing the second cavity, which makes it more convenient to fix the sample and reduces the risk of scalding.

[0011] Further, the sample holder is fixedly connected with a sample feeding rod, the distal end of the sample feeding rod is used to fix the sample, and the sample feeding rod extends out of the first cavity when the magnetic moving assembly moves.

[0012] In the further technical solution, the sample feeding rod can replace part of the length of the sample holder, and the sample feeding rod is used to fix or release the sample, and the sample holder is used to magnetically attract the magnet. Thus, the volume of the sample holder and the magnet can be reduced, the movement stroke space range of the magnet is increased when the volume of the magnet is reduced, the sample can be pushed farther, and the device has wider adaptability in actual use.

[0013] Further, the first cavity comprises a track part and a plenum part, the track part and the plenum part are sequentially arranged in a direction towards the combustion chamber, the track part and the plenum part are through and the central axes are collinear; the track part is tubular, the plenum part is spherical, the diameter of the plenum part is greater than the diameter of the track part, and the plenum part is provided with an interface for connecting compressed air.

[0014] In the further technical solution, the magnetic type moving assembly is limited to move in the track part, so that the interference factors of the sample holder moving are reduced, the magnetic attraction is not easily accidentally separated, and the sample injection is more stable. The plenum part is used to fill the compressed air into the combustion chamber, and the compressed air enters the combustion chamber synchronously with the sample, which helps the smooth combustion.

[0015] Further, the sample injection cavity is sleeved with a shell, the length of the shell is at least greater than the length of the track part, and the magnet is attached to the side wall of the shell and magnetically attracted.

[0016] In the above technical solution, the magnet and the shell are magnetically attracted, which can effectively expand the magnetic attraction area range of the magnet and the sample injection cavity, thereby significantly increasing the magnetic attraction stability of the sample holder and the magnet, reducing the risk of the magnet separating from the sample holder during movement, and making the sample injection process more stable and effective.

[0017] Further, the shape of the shell matches the shape of the sample injection cavity, and the shape of the magnet matches the shape of the shell.

[0018] Further, the magnet is installed in a magnet box, the shape of the magnet box matches the shape of the shell, and when the magnet is in a magnetically attracted state with the sample holder and the shell, the outer wall of the magnet box is attached to the outer wall of the shell, the inner wall of the magnet box is attached to the magnet, and the outer wall of the sample holder is attached to the inner wall of the sample injection cavity.

[0019] Further, the shape of the contact part between the sample holder and the sample injection cavity matches the internal shape of the sample injection cavity.

[0020] Through the shape setting of the above sample holder, sample injection cavity, shell, magnet box, and magnet, the magnetic attraction area range of the magnet and the sample injection cavity is further expanded, and the magnetic attraction stability of the sample holder and the magnet is increased. The magnet box protects the magnet and facilitates the connection of the magnet and the base.

[0021] Further, the base is provided with a sliding groove on opposite sides, the sliding groove is parallel to the central axis of the sample injection cavity, the magnet is connected with a sliding block at both ends, the sliding block is inserted into the sliding groove and is in sliding connection with the sliding groove, and a handle is connected to the end of the sliding block away from the magnet after the end of the sliding block extends out of the sliding groove. The base is also provided with a magnet stroke groove, and the sliding groove and the magnet stroke groove are in communication.

[0022] This further technical solution enables the magnet to be positioned and guided during its movement, increasing the stability of the magnet's movement and achieving the goal of stable sample injection.

[0023] Furthermore, the sample injection chamber is made of transparent glass, and a viewing window is provided on the side wall of the housing.

[0024] In this further technical solution, the transparent glass injection chamber, combined with a viewing window, facilitates real-time observation of the injection progress and sample fixation, making the injection process easier to control.

[0025] In summary, this application provides a solution with the following technical effects:

[0026] First, when the device of this application pushes the sample into the sample chamber, it does not open any holes or stroke grooves on the wall of the sample chamber to assist the sample movement. Compared with the traditional screw or cylinder propulsion method, the device of this application is less likely to introduce external air and moisture into the sample chamber when pushing the sample, and the sample injection process has little interference with the combustion experiment.

[0027] Secondly, this application, through the design of the shell and the magnetic attraction of the magnet, the design of the shape of the magnet or magnet box and the shape of the sample inlet cavity, and the design of the sliding connection between one end of the magnet and the base, makes the risk of the magnet and the sample holder detaching from the magnetic attraction very low. When pushing the sample, only the magnet needs to be pushed. It has the effects of stable sample pushing, easy control of the pushing process, and convenient operation.

[0028] Third, the sample chamber of this application is filled with compressed air, and the sample and compressed air can enter the combustion chamber simultaneously during injection, resulting in higher combustion stability. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of the device and the combustion chamber connected in this application.

[0030] Figure 2 This is a front view of the device described in this application.

[0031] Figure 3 This is a schematic diagram of the cross-sectional structure of the sample inlet chamber of this device.

[0032] Figure 4 This is a schematic diagram of the partial cross-sectional structure of the device of this application from top to bottom, where the dashed line L represents the position where the cross-section ends.

[0033] Figure 5 for Figure 4 A magnified structural diagram of part A in the middle.

[0034] Figure 6 for Figure 2 A schematic diagram of the cross-sectional structure of the BB surface. BRIEF DESCRIPTION OF DRAWINGS

[0036] 1, sample cavity; 11, first cavity; 111, track part; 112, inflation part; 1121, first interface; 1122, second interface; 12, second cavity;

[0037] 2, magnetic mobile assembly; 21, magnet; 22, sample holder; 23, sample rod;

[0038] 3, base; 31, magnet stroke slot; 32, sliding slot;

[0039] 4, combustion chamber;

[0040] 5, workbench;

[0041] 6, shell; 61, visual window;

[0042] 7, magnet box; 71, sliding block;

[0043] 8, handle. DETAILED DESCRIPTION

[0044] In order to make the purpose and technical scheme of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without any creative effort fall within the scope of protection of the present application. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. The directions mentioned in the following embodiments, such as up, down, left, right, front, back, bottom and top, are only the directions of the drawings. Therefore, the directions used are for illustration, not for limiting the present application.

[0045] The present application discloses a combustion experiment sample injection device, hereinafter referred to as sample injection device, referring to Figure 1 , comprising a sample cavity 1, a magnetic mobile assembly 2 and a base 3, the base 3 is placed on the workbench 5 beside the combustion chamber 4, the sample cavity 1 is fixed on the base 3, one end of the sample cavity 1 near the combustion chamber 4 extends into the combustion chamber 4 and communicates with the combustion chamber 4, the sample is placed in the sample cavity 1, and the sample is pushed to the combustion chamber 4 for combustion experiment through the movement of the magnetic mobile assembly 2.

[0046] Referring to Figure 2 and Figure 3, the first cavity 11 and the second cavity 12 are arranged in sequence along the direction towards the combustion chamber 4, and the central axes of the first cavity 11 and the second cavity 12 are collinear. The one end of the second cavity 12 towards the combustion chamber 4 is communicated into the combustion chamber 4, and the other end is detachably connected with the end of the first cavity 11 close to the combustion chamber 4, preferably, the detachable connection is plug-in type, and the connection part is ensured to be sealed as much as possible after the first cavity 11 and the second cavity 12 are connected, more preferably, after the first cavity 11 and the second cavity 12 are connected, the commonly used high-temperature adhesive tape can be wound at the connection part. The first cavity 11 comprises an integral track part 111 and a gas filling part 112, and the track part 111 and the gas filling part 112 are communicated. The track part 111 and the gas filling part 112 are arranged in sequence along the direction towards the combustion chamber 4, and the central axes of the track part 111 and the gas filling part 112 are collinear. The track part 111 is a round pipe pile, and the distal end of the track part 111 away from the combustion chamber 4 is integrally formed in a sealing manner. The gas filling part 112 is spherical, and the diameter of the gas filling part 112 is greater than the diameter of the track part 111. The gas filling part 112 has a first interface 1121 for connecting compressed air and a second interface 1122 for installing a temperature sensor into the combustion chamber 4. A compressed air pipe is sleeved on the first interface 1121, and the compressed air is filled into the gas filling part 112. After the compressed air is appropriately released in the gas filling part 112, the compressed air enters the combustion chamber 4 through the sample introduction cavity 1. A rubber plug can be inserted into the second interface 1122 to seal the second interface 1122, and the probe of the temperature sensor passes through the rubber plug to enter the combustion chamber 4. Such arrangement makes the first interface 1121 and the second interface 1122 closed, reducing the possibility of external air and moisture contacting the sample and entering the combustion chamber 4.

[0047] With reference to Figure 2 and Figure 3 , the first cavity 11 is fixedly sleeved with a shell 6, the length of the shell 6 is equal to or slightly longer than the length of the track part 111, the shell 6 is a cylinder matched with the shape of the sample introduction cavity 1, and the material of the shell 6 is iron for magnetic attraction with the magnetic attraction type moving assembly 2. The upper and lower sidewalls of the shell 6 are provided with visual windows 61, through which the sample in the sample introduction cavity 1 or the specific moving position of the magnetic attraction type moving assembly 2 can be observed. In order not to interfere with the magnetic attraction of the magnetic attraction type moving assembly 2, the shell 6 should be as thin as possible.

[0048] With reference to Figure 4, the magnetic attraction type moving assembly 2 comprises a magnet 21 and a sample holder 22 which are magnetically attracted to each other, and the sample holder 22 is made of iron. The sample holder 22 is located in the sample inlet cavity 1, the magnet 21 is located outside the sample inlet cavity 1 and directly below the sample inlet cavity 1, the magnet 21 is magnetically attracted to the shell 6 sleeved outside the sample inlet cavity 1 and produces a magnetic attraction to the sample holder 22. When the magnet 21 moves along the length direction of the sample inlet cavity 1 to the combustion chamber 4, the sample holder 22 in the sample inlet cavity 1 can be magnetically attracted to move synchronously, so as to push the sample fixed on the sample holder 22 into the combustion chamber 4, and the effect of pushing the sample into the combustion chamber 4 can be achieved by continuously pushing the magnet 21 to the combustion chamber 4 along with the combustion process.

[0049] With reference to Figure 5 and Figure 6 , the lower part of the sample holder 22 is arc-shaped and matched with the shape of the sample inlet cavity 1, the sample holder 22 is located directly below the sample inlet cavity 1 and magnetically attracted to the magnet 21. A long strip-shaped sample inlet rod 23 is fixed on the sample holder 22, and a hole for fixing the sample is arranged at the distal end of the sample inlet rod 23 close to the combustion chamber 4. The sample holder 22 and the sample inlet rod 23 are detachably fixed, and the sample inlet rod 23 can be multiple with different length specifications to meet various use requirements. The sample inlet rod 23 and the magnetic attraction type moving assembly 2 can continuously push the sample into the combustion chamber 4 under the condition of limited length of the sample inlet cavity 1. Of course, in some other embodiments, the sample inlet rod 23 can not be used, and the sample holder 22 can be designed to be relatively long.

[0050] With reference to Figure 6 , further, the magnet 21 is installed in a magnet box 7, the outer shape of the side of the magnet box 7 facing the sample inlet cavity 1 is arc-shaped and matched with the outer shape of the shell 6, and the side of the magnet box 7 facing the sample inlet cavity 1 is attached to the shell 6, the shape of the magnet 21 is matched with the shape of the magnet box 7, and the magnet 21 is compactly installed in the magnet box 7, so that the outer wall of the magnet 21 is attached to the inner wall of the magnet box 7.

[0051] With reference to Figure 4 and Figure 5 , the upper part of the base 3 is provided with a magnet stroke groove 31 along the movement direction of the magnet 21, and a pair of sliding grooves 32 are arranged on the opposite sides of the base 3, the sliding grooves 32 and the magnet stroke groove 31 are communicated, and the sliding grooves 32 are arranged in parallel with the central axis of the sample inlet cavity 1. The opposite ends of the magnet box 7 are fixed with sliding blocks 71, the sliding blocks 71 are inserted into the sliding grooves 32 opposite to them and are slidably connected with the sliding grooves 32. The sliding block 71 on the outward side of the magnet box 7 protrudes outwardly from the sliding groove 32 and is fixed with a handle 8. When the sample needs to be pushed, the magnet 21 can be moved to the combustion chamber 4 direction by manually holding the handle 8. In some other embodiments, the magnet 21 can be uniformly pushed to move by a mechanical member such as a pneumatic cylinder or an electric lever.

[0052] The implementation steps of the sample injection device are as follows: when the sample needs to be put into the sample injection cavity 1, the base 3 is moved backward away from the combustion chamber 4, the connection between the first cavity 11 and the second cavity 12 is disconnected, the magnet 21 is moved toward the combustion chamber 4, the distal end of the sample injection rod 23 extends out of the first cavity 11, after the sample is fixed at the distal end of the sample injection rod 23, the magnet 21 is moved away from the combustion chamber 4, the sample injection rod 23 and the sample are retracted into the first cavity 11, the base 3 is pushed toward the combustion chamber 4, the part of the first cavity 11 used to connect with the second cavity 12 is inserted into the second cavity 12, and the connection part between the first cavity 11 and the second cavity 12 is sealed by the adhesive tape, so that the sample injection cavity 1 located outside the combustion chamber 4 is sealed from the outside. When the sample needs to be injected, the base 3 is fixed, the magnet 21 is uniformly and slowly pushed toward the combustion chamber 4 within the range of the track part 111 of the first cavity 11, the magnet 21 synchronously drives the sample holder 22 in the sample cavity to move toward the combustion chamber 4 by magnetic attraction, and then the sample fixed at the distal end of the sample injection rod 23 enters the combustion chamber and continuously advances to the combustion point.

[0053] Although the present application has been disclosed as above with examples, it is not intended to limit the present application, and anyone with ordinary knowledge in the art can make some changes and modifications without departing from the spirit and scope of the present application, so the protection scope of the present application is defined by the appended patent claim scope.

Claims

1. A combustion experiment sampling device, characterized by, The utility model relates to a sample injection device, comprising: a base; a sample injection cavity fixed on the base, one end of the sample injection cavity being communicated with a combustion chamber and the rest part being closed, the sample injection cavity comprising a first cavity and a second cavity, the first cavity and the second cavity being arranged in sequence in the direction towards the combustion chamber, the first cavity and the second cavity being communicated, one end of the second cavity extending into the combustion chamber and the other end being detachably and tightly connected with the first cavity; a magnetic moving assembly comprising a magnet and a sample holder, the magnet being slidably connected with the base, the sample holder being located in the sample injection cavity, the magnet being located outside the sample injection cavity, the magnet being magnetically attracted with the sample holder; a sample injection rod being fixedly connected with the sample holder, the distal end of the sample injection rod being used for fixing a sample, the sample injection rod extending out of the first cavity when the magnetic moving assembly moves; a shell being sleeved with the sample injection cavity, the magnet being attached with and magnetically attracted with the side wall of the shell; two opposite sides of the base being provided with sliding grooves, two ends of the magnet being connected with sliding blocks, the sliding blocks being inserted into the sliding grooves and being slidably connected with the sliding grooves.

2. A sample injection device for combustion experiments according to claim 1, characterized in that The central axes of the first cavity and the second cavity are collinear.

3. A sample injection device for combustion experiments according to claim 2, wherein, The first cavity comprises a track part and an inflation part, the track part and the inflation part being arranged in sequence in the direction towards the combustion chamber, the track part and the inflation part being through and having collinear central axes; the track part is tubular, the inflation part is spherical, the diameter of the inflation part being greater than the diameter of the track part, the inflation part being provided with an interface for connecting compressed air.

4. A sample injection device for combustion experiments according to claim 3, wherein The length of the shell is at least greater than the length of the track part.

5. A sample injection device for combustion experiments according to claim 4, wherein The shape of the shell matches the shape of the sample injection cavity, and the shape of the magnet matches the shape of the shell.

6. A sample injection device for combustion experiments according to claim 1, wherein The magnet is installed in a magnet box, the shape of the magnet box matching the shape of the shell, the outer wall of the magnet box being attached with the outer wall of the shell, the inner wall of the magnet box being attached with the magnet, and the outer wall of the sample holder being attached with the inner wall of the sample injection cavity.

7. A sample injection device for combustion experiments according to claim 1, wherein The shape of the contact part between the sample holder and the sample injection cavity matches the internal shape of the sample injection cavity.

8. The sample injection apparatus for combustion experiments of claim 1, wherein, The end of the sliding block away from the magnet is connected with a handle after extending out of the sliding groove; the base is further provided with a magnet stroke groove, the sliding groove being communicated with the magnet stroke groove.

9. The sample injection apparatus for combustion experiments of claim 1, wherein, The sample injection cavity is made of transparent glass, and the side wall of the shell is provided with a visual window.

Images