Adjustable grid mesh for feeding dry powder

Abstract

The utility model relates to the technical field of grid meshes, in particular to an adjustable grid mesh for feeding dry powder, which comprises a mounting ring and a plurality of grid rods. Mounting grooves are formed in the circumferential inner side wall of the mounting ring, and a plurality of mounting grooves are formed in the circumferential direction of the mounting ring; the two ends of the grid rods can be detachably installed in the different installation grooves correspondingly so that the distance between the adjacent grid rods can be adjusted. Through detachable connection between the grid rods and the mounting grooves, the grid rods can be mounted and matched with the mounting grooves in different positions of the mounting ring, so that the position adjustment of the grid rods on the mounting ring can be realized, and when the positions of the grid rods are changed, the distance between the adjacent grid rods can be changed at the same time; according to the dry powder raw material screening device, the distance between every two adjacent grid rods can be better adjusted, different screening requirements of dry powder raw materials and dispersion requirements during feeding can be met, use is convenient, the whole grid mesh does not need to be replaced, and the cost can be better reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of grids, in particular to an adjustable grid for dry powder feeding. Background Art

[0002] Dry powder raw materials are often needed in the coating production process, and they need to be put into different equipment for processing and use. Dry powder raw materials are generally produced in advance and stored in storage tanks. Storage in storage tanks can facilitate the transportation and use of dry powder raw materials.

[0003] Different processing requirements and different usage requirements often have certain requirements on the particle size of dry powder raw materials and the uniformity of input. However, in some cases, such as humidity, water ingress, high temperature or long storage time, the dry powder raw materials in the storage tank will clump, making the particles of the dry powder raw materials larger in size and unable to disperse well when put in, and unable to meet the corresponding processing and usage requirements.

[0004] In response to the above problems, a screen is generally used when the dry powder raw materials in the storage tank are put into use. The screen can screen out the dry powder raw materials with larger agglomerated particles. At the same time, the screen can also disperse the dry powder raw materials to a certain extent, so that the dry powder raw materials put into other equipment can better meet the processing and use requirements.

[0005] However, as mentioned above, different processing requirements and different usage requirements often have different requirements for the particle size of the dry powder raw materials and the uniformity when they are put into the raw materials. This requires a variety of grids with different screening accuracies to be prepared for selection, which increases the cost. Utility Model Content

[0006] In view of the above problems existing in the prior art, the utility model provides an adjustable grid for dry powder feeding.

[0007] In order to solve the above technical problems, the utility model is solved by the following technical solutions:

[0008] An adjustable grid for dry powder feeding comprises a mounting ring and a plurality of grid bars; a mounting groove is provided on the circumferential inner side wall of the mounting ring, and a plurality of the mounting grooves are arranged along the circumferential direction of the mounting ring; the two ends of the grid bars can be detachably mounted in different mounting grooves, so as to adjust the spacing between adjacent grid bars.

[0009] Preferably, the fence rod comprises a first rod portion and a second rod portion coaxially arranged;

[0010] A connecting hole is provided on the first end of the first rod portion close to the second rod portion, and the first rod portion is sleeved on the first end of the second rod portion through the connecting hole;

[0011] A first spring is arranged in the connecting hole, and the first spring can keep the second rod portion moving toward the outside of the connecting hole.

[0012] Preferably, the connecting hole is threadedly connected to the first end of the second rod portion.

[0013] Preferably, an annular groove is provided on the circumferential inner side wall of the mounting ring, and a plurality of accommodating grooves are arranged on the circumferential side wall of the annular groove along the circumferential direction of the mounting ring, and a stopper is connected to the accommodating groove via a second spring;

[0014] The mounting grooves are formed between adjacent stoppers.

[0015] Preferably, the second end of the stopper is detachably connected to the second spring.

[0016] Preferably, the cross section of the mounting groove gradually expands in the direction from the outer ring of the mounting ring toward the inner ring of the mounting ring;

[0017] When the fence rod is installed on the mounting ring, the end of the fence rod abuts against the circumferential side wall of the mounting groove.

[0018] Preferably, both ends of the fence rod are spherical.

[0019] Preferably, in the axial direction of the mounting ring, the size of the mounting groove is larger than the size of the fence rod;

[0020] An elastic member is provided at the end of the fence rod and / or the circumferential side wall of the mounting groove, so that the fence rod as a whole can vibrate in the axial direction of the mounting ring.

[0021] Preferably, in the axial direction of the mounting ring, a plurality of annular grooves are provided, and gaps are provided between the fence bars in adjacent annular grooves.

[0022] Preferably, a magnet is provided in the mounting groove, and two ends of the fence rod are made of iron material.

[0023] The utility model has at least the following beneficial effects:

[0024] The present application uses a detachable connection setting between the fence rod and the installation groove, so that the fence rod can be installed and cooperated with the installation grooves at different positions on the installation ring, thereby realizing the position adjustment of the fence rod on the installation ring. When the position of the fence rod changes, the distance between adjacent fence rods will also change at the same time, so that the distance between adjacent fence rods can be better adjusted, so as to meet different screening requirements of dry powder raw materials and dispersion requirements during delivery, is easy to use, does not need to replace the entire grid, and can achieve optimal cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of a grid structure in some embodiments of the present application is shown;

[0026] Figure 2 A schematic diagram showing a grid structure in which adjacent grid bars are parallel to each other in some embodiments of the present application is shown;

[0027] Figure 3 A schematic diagram showing a grid structure in which adjacent grid bars are inclined relative to each other in some embodiments of the present application is shown;

[0028] Figure 4 A cross-sectional view of a fence rod in some embodiments of the present application is shown;

[0029] Figure 5 A first partial cross-sectional view showing a first rod portion extending into a mounting groove in some embodiments of the present application is shown;

[0030] Figure 6 A second partial cross-sectional view showing a first rod portion extending into a mounting groove in some embodiments of the present application is shown.

[0031] The parts indicated by the numbers in the accompanying drawings are as follows:

[0032] 10. Grid structure; 11. Sieve holes; 100. Mounting ring; 110. Annular groove; 111. Accommodating groove; 111a. Stop block; 111b. Second spring; 112. Mounting groove; 112a. Magnet; 200. Grid rod; 210. First rod portion; 211. Connecting hole; 211a. First spring; 220. Second rod portion; 221. Connecting groove. DETAILED DESCRIPTION

[0033] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments are only used to explain the utility model but not to limit it.

[0034] like Figure 1-6As shown, the present embodiment provides an adjustable grid for dry powder feeding, which includes a mounting ring 100 that can be installed at the opening of a storage tank or other equipment, a plurality of mounting grooves 112 are arranged on the circumferential inner wall of the mounting ring 100, and a plurality of the mounting grooves 112 are evenly distributed along the circumferential direction of the mounting ring 100; it also includes a plurality of fence rods 200, both ends of the fence rods 200 can be respectively installed in the mounting grooves 112 at different positions of the mounting ring 100; when the plurality of fence rods 200 are installed on the mounting ring 100, the mounting ring 100 and the plurality of fence rods 200 can form a grid structure 10, so that the dry powder raw materials can be screened and dispersed. Furthermore, the mounting connection between the two ends of the fence bar 200 and the mounting groove 112 is detachable. By removing the fence bar 200 from the mounting groove 112, the position of the fence bar 200 on the mounting ring 100 can be adjusted, so that the two ends of the fence bar 200 can be inserted into other mounting grooves 112 at different positions of the mounting ring 100.

[0035] In particular, through the detachable connection between the fence rod 200 and the mounting groove 112, the fence rod 200 can be installed and cooperated with the mounting groove 112 at different positions on the mounting ring 100, so that the position of the fence rod 200 on the mounting ring 100 can be adjusted. When the position of the fence rod 200 changes, the distance between adjacent fence rods 200 will also change at the same time, so that the distance between adjacent fence rods 200 can be better adjusted, so that different screening requirements for dry powder raw materials and dispersion requirements during delivery can be met, which is easy to use without replacing the entire grid and can be more cost-effective.

[0036] Furthermore, by installing and matching the fence bars 200 with the mounting grooves 112 at different positions on the mounting ring 100, adjacent fence bars 200 can be parallel to each other, such as Figure 2 As shown, they can also be in a state of being inclined relative to each other, such as Figure 3 As shown, that is, by adjusting the position of the fence rod 200, the shape of the sieve holes 11 between adjacent fence rods 200 can be adjusted better, and the use is more flexible. At the same time, by adjusting the position of the fence rod 200 on the mounting ring 100, the screening capacity of the entire mesh structure 10 can be divided into zones. In the area with high screening requirements, the number of fence rods 200 can be increased to make the density of the sieve holes 11 higher. In the area with low screening requirements, the number of fence rods 200 can be reduced to make the density of the sieve holes 11 lower, and the use is more flexible. Similarly, by adjusting the position of the fence rod 200 on the mounting ring 100, the dispersion capacity of the entire mesh structure 10 can also be divided into zones, and the dispersion capacity of different areas of the mesh structure 10 for dry powder raw materials can be better changed.

[0037] It is worth mentioning that after the grid structure 10 has been screening and dispersing the dry powder raw materials for a long time, the dry powder raw materials also have a certain weight, so that the grid rod 200 will have slight deformation. At this time, only the corresponding single grid rod 200 needs to be replaced, and there is no need to replace the entire grid structure 10, which can effectively reduce the cost of replacement or maintenance.

[0038] In some embodiments, the fence bar 200 includes a first rod portion 210 and a second rod portion 220, wherein the first rod portion 210 and the second rod portion 220 are coaxially arranged, a connecting hole 211 is arranged on the first end of the first rod portion 210 close to the second rod portion 220, and an annular connecting groove 221 is arranged on the circumferential side wall of the second rod portion 220 close to the first end of the first rod portion 210, and the first rod portion 210 can be sleeved on the connecting groove 221 of the second rod portion 220 through the connecting hole 211, so as to realize the installation connection between the first rod portion 210 and the second rod portion 220. After the first rod portion 210 and the second rod portion 220 are installed and connected, the connecting hole 211 and the connecting groove 221 can move relative to each other in the axial direction, thereby enabling the first rod portion 210 and the second rod portion 220 to move relative to each other in the axial direction.

[0039] It can be understood that the first rod portion 210 and the second rod portion 220 can achieve relative movement in the axial direction through the connecting hole 211 and the connecting groove 221, so that the overall axial size of the fence rod 200 composed of the first rod portion 210 and the second rod portion 220 can change. When in use, the first end of the second rod portion 220 is moved toward the direction inside the connecting hole 211 through the connecting groove 221, so that the overall axial size of the first rod portion 210 and the second rod portion 220 becomes smaller, that is, the axial size of the overall fence rod 200 is less than or equal to the inner ring diameter size of the mounting ring 100, so that the overall fence rod 200 can be movable in the inner ring of the mounting ring 100, and then the fence rod 200 is rotated in the inner ring of the mounting ring 100, so that the two ends of the fence rod 200 can be moved to the corresponding mounting grooves 112 respectively. At this time, the first end of the second rod portion 220 is moved toward the direction outside the connecting hole 211 through the connecting groove 221, that is, The two ends of the fence rod 200 can be respectively extended into the corresponding installation grooves 112 to realize the installation connection of the fence rod 200 on the installation ring 100; when adjusting the position of the fence rod 200 on the installation ring 100, as described above, first adjust the relative position between the first rod portion 210 and the second rod portion 220 to reduce the overall axial size of the fence rod 200, and then move the fence rod 200 as a whole to the corresponding installation groove 112 in the inner circle of the installation ring 100, and then reversely adjust the relative position between the first rod portion 210 and the second rod portion 220 so that the two ends of the fence rod 200 can be respectively extended into the corresponding installation grooves 112, which will not be repeated here.

[0040] In particular, when the two ends of the fence rod 200 are respectively extended into the corresponding installation grooves 112, the first end of the first rod portion 210 and the first end of the second rod portion 220 can still maintain the socket connection through the cooperation of the connecting hole 211 and the connecting groove 221, so that the connection between the first rod portion 210 and the second rod portion 220 can have better stability, avoiding the separation of the first rod portion 210 and the second rod portion 220, and better improving the stability of use.

[0041] Furthermore, a first spring 211a is provided in the connecting hole 211. When assembling the fence rod 200, the first spring 211a is first placed in the connecting hole 211 of the first rod portion 210, and then the first end of the second rod portion 220 is extended into the connecting hole 211. The first spring 211a can maintain the second rod portion 220 to have a tendency to move toward the outside of the connecting hole 211.

[0042] In particular, through the setting of the first spring 211a, when adjusting the overall axial size of the fence rod 200, a force is first applied to move the second rod portion 220 toward the direction of the connecting hole 211, so that the first end of the second rod portion 220 can squeeze the first spring 211a in the connecting hole 211, and the overall axial size of the fence rod 200 is reduced by compressing the first spring 211a, so that the fence rod 200 can move in the inner circle of the mounting ring 100. When the fence rod 200 moves to the corresponding mounting groove 112, the applied force is withdrawn, so that the first spring 211a can push the second rod portion 220 toward the outside of the connecting hole 211, so that the overall size of the fence rod 200 can be lengthened, so that the two ends of the fence rod 200 can extend into the corresponding mounting grooves 112, thereby realizing the adjustment of the position of the fence rod 200 on the mounting ring 100.

[0043] It is worth mentioning that, by setting the first spring 211a in the connecting hole 211, when there is no external force, the second rod portion 220 can automatically move toward the outside of the connecting hole 211, so that the overall axial dimension of the fence rod 200 can automatically become longer for easy use.

[0044] In some embodiments, the connection hole 211 and the connection groove 221 are connected by threads, that is, the connection hole 211 and the first end of the second rod portion 220 are connected by threads.

[0045] It should be noted that when it is necessary to adjust the overall axial size of the gate rod 200, the first rod portion 210 and the second rod portion 220 are rotated so that the second rod portion 220 can move toward the direction inside the connecting hole 211. At this time, the first spring 211a is compressed and the overall axial size of the gate rod 200 is reduced. The first rod portion 210 and the second rod portion 220 are rotated in opposite directions so that the second rod portion 220 can move toward the direction outside the connecting hole 211. At this time, the first spring 211a is stretched and the overall axial size of the gate rod 200 is increased.

[0046] In particular, the connecting hole 211 and the connecting groove 221 are connected by a threaded connection, so that the adjustment of the overall axial size of the fence rod 200 is carried out gradually, with better stability and controllability. At the same time, under the action of the first spring 211a, the threaded grooves between the connecting hole 211 and the connecting groove 221 can be pressed against each other, so that the stability is higher, and when adjusting the relative position between the first rod portion 210 and the second rod portion 220, the operation can be performed at intervals. Even if the staff does not contact the first rod portion 210 and the second rod portion 220, the first rod portion 210 and the second rod portion 220 will not be relatively far away due to the force of the first spring 211a, which is convenient for the staff to operate and use.

[0047] It is worth mentioning that when there is no threaded connection between the connecting hole 211 and the connecting groove 221, only the first spring 211a is arranged between the first rod portion 210 and the second rod portion 220. Since the first spring 211a has elastic properties, the two ends of the fence rod 200 can abut against the corresponding installation groove 112, and the abutment force of the two ends of the fence rod 200 in the corresponding installation groove 112 is relatively weak; when the connecting hole 211 and the connecting groove 221 are threadedly connected, the two ends of the fence rod 200 can generate sufficient abutment force on the installation groove 112, thereby improving the stability of the installation connection of the fence rod 200 in the corresponding installation groove 112.

[0048] It should be further noted that the connection hole 211 and the connection groove 221 are only partially connected by threads. When the fence rod 200 is moved as a whole in the inner circle of the mounting ring 100 to the corresponding mounting groove 112, the first rod portion 210 and the second rod portion 220 are rotated at this time so that the threaded fit between the first rod portion 210 and the second rod portion 220 can be released, and the first spring 211a can push the first rod portion 210 and the second rod portion 220 to extend into the corresponding mounting groove 112, thereby realizing the installation and use of the fence rod 200 on the mounting ring 100.

[0049] In some embodiments, an annular groove 110 is provided on the circumferential inner side wall of the mounting ring 100, and a receiving groove 111 is provided on the circumferential side wall of the annular groove 110, and a plurality of the receiving grooves 111 are evenly arranged along the circumferential direction of the mounting ring 100, and a stopper 111a is provided in the receiving groove 111, wherein the first end of the stopper 111a extends out of the receiving groove 111 and is in the annular groove 110, and the above-mentioned mounting groove 112 is formed between two adjacent stoppers 111a and the annular groove 110. Further, a second spring 111b is provided in the receiving groove 111, and the second end of the stopper 111a close to the second spring 111b is connected to the receiving groove 111 through the second spring 111b, and the second spring 111b can keep the stopper 111a having a tendency to move toward the direction outside the receiving groove 111.

[0050] It is understandable that when the position of the fence bar 200 on the mounting ring 100 needs to be adjusted, the stopper 111a can be squeezed so that the stopper 111a moves toward the receiving groove 111 by compressing the second spring 111b, thereby enabling the corresponding ends of the fence bar 200 to move between adjacent mounting grooves 112, thereby achieving adjustment of the spacing between adjacent fence bars 200. After the position of the fence bar 200 is adjusted, the force applied to the stopper 111a is canceled, so that under the push of the second spring 111b, the first end of the stopper 111a can extend out of the receiving groove 111 and be in the annular groove 110, so that the stopper 111a can limit the end of the fence bar 200 again.

[0051] In some embodiments, a detachable connection is provided between the second end of the stopper 111a and the second spring 111b. Specifically, this can be achieved by threaded connection, snap connection or adhesive connection, so that the stopper 111a can be removed from the second spring 111b for easy replacement and maintenance and use.

[0052] In some embodiments, the cross-section of the mounting groove 112 tends to gradually expand in the direction from the outer ring of the mounting ring 100 to the inner ring of the mounting ring 100. In this embodiment, this can be achieved by chamfering the side edges at the opening of the mounting groove 112. The chamfering design may include rounded corners or beveled corners, so that the circumferential side walls of the mounting groove 112 can play a guiding role, so as to better assist the end of the fence rod 200 to extend into the corresponding mounting groove 112.

[0053] Furthermore, when the fence bar 200 is installed on the mounting ring 100, the end of the fence bar 200 can abut against the circumferential side wall of the mounting groove 112, thereby realizing the installation connection of the end of the fence bar 200 in the corresponding mounting groove 112. It can be understood that the end of the fence bar 200 directly abuts against the circumferential side wall of the mounting groove 112, and does not abut against the side wall of the mounting groove 112 in the radial direction of the mounting ring 100.

[0054] It is worth mentioning that by setting the cross-section of the mounting groove 112 in the direction from the outer ring of the mounting ring 100 toward the inner ring of the mounting ring 100, the cross-section of the mounting groove 112 tends to gradually expand, so that the end of the fence rod 200 abuts against the circumferential side wall of the mounting groove 112. In this state, the end of the fence rod 200 and the side wall of the mounting groove 112 are in a state of line contact or point contact.

[0055] In particular, since the end of the fence rod 200 abuts against the circumferential side wall of the mounting groove 112, when the position of the fence rod 200 needs to be adjusted, a force can be applied to the fence rod 200 so that the end of the fence rod 200 squeezes the corresponding stop block, so that the stop block moves into the accommodating groove 111 by compressing the second spring 111b, which can better realize the movement of the end of the fence rod 200 to other mounting grooves 112; and since there is line contact or point contact between the end of the fence rod 200 and the side wall of the mounting groove 112, the friction force can be better reduced, and the end of the fence rod 200 can be conveniently pressed against the stop block by moving to realize the position adjustment of the end of the fence rod 200.

[0056] In some embodiments, both ends of the fence bar 200 are spherically arranged, which can better guide the process of the end of the fence bar 200 extending into the installation groove 112, thereby facilitating the installation and use of the fence bar 200 in the corresponding installation groove 112.

[0057] Furthermore, since the cross-section of the mounting groove 112 tends to gradually expand in the direction from the outer ring of the mounting ring 100 to the inner ring of the mounting ring 100, the end of the fence rod 200 is spherically arranged, so that the end of the fence rod 200 can maintain point contact with the circumferential side wall of the mounting groove 112, which can further reduce the friction resistance between the end of the fence rod 200 and the mounting groove 112, thereby facilitating the end of the fence rod 200 to squeeze the stop block by moving, so as to adjust the position of the end of the fence rod 200.

[0058] In some embodiments, Figure 6As shown, in the axial direction of the mounting ring 100, the size of the mounting groove 112 is larger than the size of the end of the fence rod 200, and an elastic member (not shown in the figure) is provided on the end of the fence rod 200 and / or the circumferential side wall of the mounting groove 112. After the fence rod 200 is mounted on the mounting ring 100, the end of the fence rod 200 abuts against the circumferential side wall of the mounting groove 112 through the elastic member.

[0059] In particular, the elastic member can be made of elastic rubber. Since the elastic rubber has certain elastic properties, when the end of the fence rod 200 is abutted against the circumferential side wall of the mounting groove 112 through the elastic rubber, when in use, the dry powder raw material is placed on the fence rod 200 in the axial direction of the mounting ring 100. Since the dry powder raw material has a certain weight, the dry powder raw material will exert a certain force on the fence rod 200, so that the fence rod 200 can squeeze the corresponding elastic rubber through its two ends, causing the elastic rubber to deform, and then the fence rod 200 as a whole can vibrate in the axial direction of the mounting ring 100, thereby being able to buffer the force exerted by the dry powder raw material on the fence rod 200, thereby being able to better avoid deformation of the fence rod 200 as a whole, affecting the screening and dispersion effects of the dry powder raw material.

[0060] Furthermore, since the fence bar 200 as a whole can generate a certain degree of vibration through the elastic rubber, the dry powder raw materials accumulated on the fence bar 200 can be driven to vibrate and separate from the fence bar 200, thereby having a certain cleaning effect on the fence bar 200 itself. At the same time, the vibration of the fence bar 200 as a whole can cause a certain collision with the dry powder raw materials, which can further increase the delivery range of the dry powder raw materials and improve the dispersion effect of the dry powder raw materials.

[0061] In some embodiments, in the axial direction of the mounting ring 100, a plurality of annular grooves 110 are provided on the circumferential inner wall of the mounting ring 100, so that a plurality of layers of fence rods 200 can be arranged in the axial direction of the mounting ring 100, thereby further improving the screening and dispersion effect of the dry powder raw materials.

[0062] Furthermore, gaps are provided between the fence rods 200 in adjacent annular grooves 110 so that the fence rods 200 in adjacent annular grooves 110 can have a certain movable space in the axial direction of the mounting ring 100, thereby enabling the fence rods 200 to vibrate in the axial direction of the mounting ring 100 through the elastic rubber.

[0063] In some embodiments, Figure 5As shown, a magnet 112a is provided in the installation groove 112, and both ends of the fence rod 200 are made of iron material, so that after the fence rod 200 is installed in the corresponding installation groove 112, the magnet 112a in the installation groove 112 can have a certain attraction effect on the corresponding end of the fence rod 200, thereby improving the stability of the fence rod 200 when installed and used in the corresponding installation groove 112.

[0064] In short, the above is only a preferred embodiment of the present utility model, and all equivalent changes and modifications made according to the scope of the patent application of the present utility model should fall within the scope of the present utility model patent.

Claims

1. An adjustable grid for dry powder feeding, characterized in that: It comprises a mounting ring and a plurality of fence rods; a mounting groove is arranged on the circumferential inner side wall of the mounting ring, and a plurality of the mounting grooves are arranged along the circumferential direction of the mounting ring; the two ends of the fence rod can be detachably mounted in different mounting grooves respectively, so as to adjust the distance between adjacent fence rods.

2. The adjustable grid for dry powder feeding according to claim 1, characterized in that: The fence rod comprises a first rod portion and a second rod portion which are coaxially arranged; A connecting hole is provided on the first end of the first rod portion close to the second rod portion, and the first rod portion is sleeved on the first end of the second rod portion through the connecting hole; A first spring is arranged in the connecting hole, and the first spring can keep the second rod portion moving toward the outside of the connecting hole.

3. The adjustable grid for dry powder feeding according to claim 2, characterized in that: The connecting hole is threadedly connected to the first end of the second rod portion.

4. The adjustable grid for dry powder feeding according to claim 1, characterized in that: An annular groove is provided on the circumferential inner side wall of the mounting ring, and a plurality of accommodating grooves are arranged on the circumferential side wall of the annular groove along the circumferential direction of the mounting ring, and a stopper is connected to the accommodating groove via a second spring; The mounting grooves are formed between adjacent stoppers.

5. The adjustable grid for dry powder feeding according to claim 4, characterized in that: The second end of the stopper is detachably connected to the second spring.

6. The adjustable grid for dry powder feeding according to any one of claims 1 to 5, characterized in that: The cross section of the mounting groove gradually expands in a direction from the outer ring of the mounting ring toward the inner ring of the mounting ring; When the fence rod is installed on the mounting ring, the end of the fence rod abuts against the circumferential side wall of the mounting groove.

7. The adjustable grid for dry powder feeding according to claim 6, characterized in that: The two ends of the fence rod are arranged in spherical shapes.

8. The adjustable grid for dry powder feeding according to claim 6, characterized in that: In the axial direction of the mounting ring, the size of the mounting groove is larger than the size of the fence rod; An elastic member is provided at the end of the fence rod and / or the circumferential side wall of the mounting groove, so that the fence rod as a whole can vibrate in the axial direction of the mounting ring.

9. The adjustable grid for dry powder feeding according to claim 4, characterized in that: In the axial direction of the mounting ring, a plurality of annular grooves are provided, and gaps are provided between the fence bars in adjacent annular grooves.

10. The adjustable grid for dry powder feeding according to claim 2, characterized in that: A magnet is arranged in the installation groove, and two ends of the fence rod are made of iron material.

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