Eccentric weighing feeder for long cantilever horizontal centrifuges

Abstract

This invention belongs to the field of centrifuge feeding and weighing technology, specifically relating to an eccentric weighing feeding device for a long cantilever horizontal centrifuge. The invention includes a three-point structure, comprising two sets of front-end elastic vibration isolation points and one set of rear-end elastic vibration isolation points. The center of gravity and center of mass of the long cantilever horizontal centrifuge are both located within the triangle formed by the lines connecting the three points. The front-end elastic vibration isolation points are arranged on the rotor side at the center of mass, with the two sets of front-end elastic vibration isolation points symmetrically arranged along the rotor axis. The rear-end elastic vibration isolation points are arranged on opposite sides of the rotor side at the center of mass, and are eccentrically arranged relative to the rotor axis. A weighing component is also installed on the bottom support on the opposite side of the rear-end elastic vibration isolation points, with the rotor axis as the boundary. This invention effectively reduces the impact of equipment vibration on the surrounding environment, ensures vibration isolation efficiency, and accurately detects the actual weight of the material inside the rotor, thereby optimizing feeding control and achieving the purpose of small-batch, multiple-feed feeding.

Description

Technical Field

[0001] This invention belongs to the field of centrifuge feeding and weighing technology, specifically relating to an eccentric weighing feeding device for a long cantilever horizontal centrifuge. Background Technology

[0002] Centrifuges are an important branch of separation machinery, used to separate liquids from solids or three-phase mixtures of liquid, liquid, and solid. They are widely used in chemical, petrochemical, coal, metallurgical, food, pharmaceutical, petroleum, non-ferrous metals, and environmental protection industries, with large quantities and wide applications. In a narrow sense, centrifuges can be divided into two main categories based on their spindle type: vertical and horizontal. Among horizontal centrifuges, there is a type with a long cantilever, such as the automatic bag-turning centrifuge, piston-push centrifuge, and horizontal scraper centrifuge. In these types, the rotor is located outside the bearing support point, forming a cantilever structure. Due to the equipment's function, technical parameters, and structural requirements, the cantilever end is quite long, exceeding 1.5 times the rotor width; this type is typically defined as a long-cantilever horizontal centrifuge. During operation, especially during the feeding process, these centrifuges generate excitation forces due to material impact, rotor rotation, rotor roundness errors, and dynamic balance accuracy, forming vibration sources and causing equipment vibration. Simultaneously, the long cantilever structure exacerbates and amplifies these vibrations, posing a technical challenge to vibration isolation between the equipment and the foundation. Under these vibration conditions, accurately detecting the amount of material fed into the rotor using load cells becomes another technical challenge. Generally, due to their complex structure and high technical parameters, these long cantilever horizontal centrifuges typically weigh several tons, ranging from 1 to 4 tons to over 10 tons, while each feeding operation only yields about 10 kilograms, or tens of kilograms, at most a little over 100 kilograms. In other words, the weighing value of a long cantilever horizontal centrifuge is usually only about 1% of its maximum capacity. Clearly, directly weighing the material inside the centrifuge chamber using load cells with such a small feeding volume is inaccurate. Currently, in industrial applications, flow meters are mostly installed at the feed pipe to monitor the feed rate. However, due to practical issues such as incomplete feed in the pipe and uneven solid-liquid feed concentration, feed detection is very inaccurate. Another method involves installing level switches inside the rotor; however, these level switches cannot output analog signals and can only detect the feed level inside the rotor—that is, they send a signal when a certain level is reached to interlock and stop feeding at the feed end—but cannot detect the actual feed rate. This issue urgently needs to be addressed. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an eccentric weighing feeding device for a long cantilever horizontal centrifuge. While effectively reducing the impact of equipment vibration on the surrounding environment and ensuring vibration isolation efficiency, it can also accurately detect the actual weight of the material inside the rotor, thereby optimizing feeding control and achieving the purpose of feeding in small quantities and multiple times.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An eccentric weighing feeding device for a long cantilever horizontal centrifuge is characterized by: a three-point structure arranged on a bottom support for supporting the bottom plate of the long cantilever horizontal centrifuge; the three-point structure includes two sets of front elastic vibration isolation points and one set of rear elastic vibration isolation points, and the center of gravity and center of mass of the long cantilever horizontal centrifuge are both located within the triangle formed by the lines connecting the three support points; along the rotor axis, with the center of mass as the boundary, the front elastic vibration isolation points are arranged on the rotor side of the center of mass, and the two sets of front elastic vibration isolation points are symmetrically arranged along the rotor axis; the rear elastic vibration isolation points are arranged on the opposite side of the rotor side of the center of mass, and the rear elastic vibration isolation points are eccentrically arranged relative to the rotor axis; with the rotor axis as the boundary, a weighing component for measuring the downward pressure and / or upward tension of the bottom plate is also provided on the bottom support on the opposite side of the rear elastic vibration isolation points.

[0006] Preferably, the weighing assembly includes a weighing sensor fixed to the bottom bracket; the detection point of the weighing sensor faces upward, and from bottom to top, a pressure block for pressing against the detection point, an intermediate connecting rod located above the pressure block, and a vibration damping part that forms a hinged engagement with the top end of the intermediate connecting rod to provide vibration damping function are arranged sequentially, the vibration damping part is fixed to the bottom plate, and the bottom end of the intermediate connecting rod forms a hinged engagement with the pressure block; the hinge axes at the hinge points at both ends of the intermediate connecting rod intersect each other.

[0007] Preferably, a support base is provided at the bottom bracket, and the weighing sensor is arranged on the support base; the intermediate connecting rod includes a pressure rod and an adjusting screw that is coaxially threaded in the threaded hole of the pressure rod. The bottom end of the adjusting screw is provided with a joint hole, so as to form a hinged engagement with the positioning pin preset at the pressure block. After the top end of the pressure rod passes through the bottom bracket platform, it is hinged to the connector at the bottom end of the vibration damping part by a horizontal pin.

[0008] Preferably, the vibration damping part is an elastic damping vibration isolator.

[0009] Preferably, the weighing sensor is S-type, cantilever beam type, or bridge type.

[0010] Preferably, a limit protection rod is threaded onto the bottom bracket, with the top of the limit protection rod extending vertically upward and pressing against the back of the detection point.

[0011] Preferably, each elastic vibration isolation point is a three-point installation structure, including two vertical vibration isolators and one horizontal vibration isolator constituting the three points. The symmetrical plane of the two vertical vibration isolators is located on a vertical plane parallel to the rotor axis, and the axis of the horizontal vibration isolator coincides with the vertical plane.

[0012] Preferably, the horizontal vibration isolator includes a nut, a pressure plate, a limiting sleeve, and a pin arranged sequentially from top to bottom along the vertical direction; the limiting sleeve is coaxially installed in the mounting hole at the base plate, and the pin passes through the limiting sleeve and the pressure plate sequentially from bottom to top, finally forming a threaded engagement with the nut.

[0013] Preferably, the vertical vibration isolator is an elastic damping vibration isolator.

[0014] The beneficial effects of this invention are as follows:

[0015] 1) This invention abandons the conventional weighing method of long cantilever horizontal centrifuges and instead proposes a three-point vibration isolation system. This system not only effectively absorbs equipment vibration, preventing it from being transmitted to the bottom support, but also significantly reduces the impact of equipment vibration on the surrounding environment, resulting in high vibration isolation efficiency. Furthermore, utilizing the elastic vibration isolation characteristics of the system, it can be combined with the invention's unique component-type weighing system for detecting the feed rate. Specifically, weighing components are arranged on the opposite side of the rear elastic vibration isolation point, which is installed at a certain distance from the rotor axis. This allows for precise determination of the actual feed rate with high detection accuracy.

[0016] This invention can accurately detect the actual weight of the material inside the rotor through the weighing component, which can optimize the feeding control. Furthermore, by setting the maximum and minimum feeding values, it can achieve multiple feedings in small quantities to ensure the maximum value of the filter cake is always reached.

[0017] 2) The weighing component can be a conventional mechanical weighing structure or, as described in this invention, a weighing sensor to improve weighing convenience. On one hand, the weighing component cannot be directly mounted to the base plate to avoid adverse effects from equipment vibration on the weighing results. Therefore, a vibration damping section is needed to absorb most of the equipment vibration to avoid affecting detection accuracy. On the other hand, the weighing sensor relies on a pressure block, intermediate connecting rod, and connector to form a three-section joint structure. This joint structure has degrees of freedom in all four directions (front, back, left, and right), allowing for tilting and eliminating errors caused by installation and vibration, thus ensuring the verticality of the pressure block.

[0018] 3) The intermediate connecting rod consists of a pressure rod and an adjusting screw, forming a threaded pair structure. This threaded pair structure is used to adjust the height of the weighing component, ensuring that it is suitable for its operating environment.

[0019] 4) For each elastic vibration isolation point in the three-point structure, the construction is consistent, including two vertical vibration isolators and one horizontal vibration isolator. The construction of the vertical vibration isolator is the same as that of the damping section, which is an elastic damper. The horizontal vibration isolator achieves the corresponding horizontal vibration isolation effect by being stressed by a pin and horizontally pushing against the limiting sleeve located at the bottom plate. The overall structure is simple and reliable and stable in use. Attached Figure Description

[0020] Figure 1 This is an assembly diagram of the present invention;

[0021] Figure 2 for Figure 1 A magnified view of part I;

[0022] Figure 3 for Figure 1 The right view;

[0023] Figure 4 for Figure 3 Enlarged view of part II;

[0024] Figure 5 This is a diagram showing the installation position of the three-point structure relative to the base plate.

[0025] Figure 6 This is a force diagram of the long cantilever horizontal centrifuge used in this invention.

[0026] Figure 7 This is a flowchart of the selection process for vertical vibration isolators.

[0027] The actual correspondence between the reference numerals and component names in this invention is as follows:

[0028] a-Rotor; b-House; c-Main shaft bearing housing; d-Base plate; e-Transmission system;

[0029] 10-Bottom bracket; 11-Support base;

[0030] 20a - Vertical vibration isolator; 20b - Horizontal vibration isolator; 20c - Nut; 20d - Pressure plate; 20e - Limiting sleeve; 20f - Pin; 21 - Front elastic vibration isolation point; 22 - Rear elastic vibration isolation point;

[0031] 30-Weighing component; 31-Weighing sensor; 32-Vibration damping part; 32a-Connector; 33a-Pressure rod; 33b-Adjusting screw; 33c-Joint hole; 33d-Horizontal pin; 34-Limit protection rod; 35-Pressure block. Detailed Implementation

[0032] For ease of understanding, this section combines... Figure 1-7 The specific structure and operation of the present invention are further described below:

[0033] The specific application structure and installation status of this invention are as follows: Figure 1-5 As shown. Regarding the application of this invention, namely the long-cantilever horizontal centrifuge, as... Figure 1As shown, rotor a is located outside the bearing support point and is cantilevered. Rotor a is surrounded by a shell b to collect and discharge the liquid and solids centrifuged from rotor a. Rotor a typically rotates at high speed, with a diameter ranging from 200 to 1800 mm and a speed of 3000 to 750 r / min; these rotors a usually have perforations in their shell walls, operating on the principle of centrifugal filtration. Simultaneously, rotor a is coaxially mounted with the main shaft bearing seat c, which is installed on the base plate d. The transmission system e provides the power required for rotor a's rotation. In actual operation, solid and liquid materials enter the centrifuge chamber containing rotor a through the feed pipe. Simultaneously, the rotation of the transmission system e drives rotor a and the internal materials to rotate at high speed via the main shaft bearing seat c. The liquid in the material is thrown out of rotor a, while the solids are trapped inside. Finally, the solids inside rotor a, i.e., the filter cake, are discharged through the unloading mechanism.

[0034] According to the principle of static indeterminacy, an object with three supports will always be in a stable state of static equilibrium as long as its center of gravity lies within the triangle formed by the three supports. For an object with four supports, in an ideal state of static equilibrium, only the three supports forming the triangle containing the object's center of gravity will experience forces, while the additional supports will not.

[0035] Therefore, to maintain equipment stability, this invention first sets up a three-point support structure on the mounting surface d of the base plate of the long cantilever horizontal centrifuge, such as... Figure 5 As shown. Because the center of mass of the long cantilever horizontal centrifuge is located on the axis and towards the direction of rotor a, that is, as... Figure 5 The center of mass is located to the left of the centroid, or rather, to the side of the rotor a. Therefore, two sets of front-end elastic vibration isolation points 21 are set on this side, symmetrically distributed with respect to the axis, and the two sets of front-end elastic vibration isolation points 21 are kept as far apart as possible. A set of rear-end elastic vibration isolation points 22 is set on the rear side of the mounting surface of the base plate d. This is to ensure that the weight of the long cantilever horizontal centrifuge and the feed mass generate a component force on the weighing assembly 30. The axis of the rear-end elastic vibration isolation point 22 deviates from the axis of the long cantilever horizontal centrifuge by an amount of Δp mm. Figure 5 As shown. Thus, the weight of the long cantilever horizontal centrifuge and the feed mass will generate a component force on the opposite side of the deviation Δp. The weighing component 30 detects this component force to reflect the change in the feed mass.

[0036] More specifically as follows:

[0037] I. Elastic vibration isolation points

[0038] Based on the structure and operation of the long cantilever horizontal centrifuge described above, it can be seen that the center of mass of the entire centrifuge is located slightly to the left of the center of the bottom support 10, rather than near the center of the bottom support 10. Taking the center of mass located on the rotor a-axis in the top view as the dividing point, the left side of the equipment is heavier than the right side, that is, the mass distribution is uneven. According to the principle of static indeterminacy, an object with three supports will always be in a stable static equilibrium state as long as the center of mass is within the triangle formed by the three supports. Therefore, the entire vibration isolation system is set as a three-point system. Since the left side of the center of mass, or the side of the rotor a, is heavier, two sets of front elastic vibration isolation points 21 are set; the right side of the center of mass is lighter, so a set of rear elastic vibration isolation points 22 is set. For optimization, it is recommended that each elastic vibration isolation point be as far away from the center of mass as possible while meeting the above requirements.

[0039] In actual assembly, such as Figure 5 As shown, each set of elastic vibration isolation points is a three-point installation structure, including two vertical vibration isolators 20a and one horizontal vibration isolator 20b constituting the three points. The vertical vibration isolator 20a is an elastic damping vibration isolator, which is commercially available; while the horizontal vibration isolator 20b is composed of a pin 20f, a limiting sleeve 20e, a pressure plate 20d, etc.

[0040] For vertical vibration isolators 20a, the design process first requires calculating the mass that the heavier end on the left side of the center of gravity must bear when arranging the elastic isolation points, based on the equipment's weight and center of gravity distribution. The dynamic load generated by equipment vibration must also be considered. Therefore, a suitable vertical vibration isolator 20a, i.e., an elastic damping vibration isolator, must be selected. In other words, the mass that each vertical vibration isolator 20a can bear must be within its bearing capacity range. Generally, the selection process for vertical vibration isolators 20a is as follows: Figure 7 As shown.

[0041] exist Figure 7 In the selection flowchart shown, the compression amount F meets the structural requirements. Generally, this means that the compression amount F is basically the same for each vertical vibration isolator 20a when bearing the dynamic load of the equipment, ensuring the level of the equipment. The compression amount F should not cause interference between the equipment and the bottom support 10 or the surrounding environment during the compression process of the vertical vibration isolator 20a.

[0042] Subsequently, the number of vertical vibration isolators 20a can be determined based on the total weight and dynamic load of the equipment. In this example, six are used. The number of vertical vibration isolators 20a is set as needed for each group of elastic vibration isolation points. In this example, two vertical vibration isolators 20a are set for each group of elastic vibration isolation points. Figure 1-2 As shown, the bottom ends of the two vertical vibration isolators 20a are fastened to the bottom bracket 10 with screws, and the top ends are fastened to the base plate d with bolts. When the equipment vibrates vertically, the base plate d sways accordingly, and the vibration is ultimately absorbed by the springs and damping of the vertical vibration isolators 20a, thus eliminating the impact of vertical vibration on the surrounding environment.

[0043] Based on the above structure, such as Figure 2 As shown, a pin 20f is vertically fixed on the bottom support 10. The pin 20f can be designed as a stepped cylinder with certain strength and rigidity, and is set perpendicular to the platform of the bottom support 10. The limiting sleeve 20e is made of high-strength rubber with a large damping coefficient. It is cylindrical in shape, hollow in the middle, and has an outward flange or flange at the top. The hollow cylindrical hole in the center of the limiting sleeve 20e mates with the outer cylindrical surface of the pin 20f. The outer cylindrical surface of the limiting sleeve 20e mates with the mounting hole at d on the base plate. The pin 20f passes through the limiting sleeve 20e and has a thread on its top. The pressure plate 20d is then passed through the thread on the top of the pin 20f, pressing down on the flange or outward flange on the upper part of the limiting sleeve 20e. The nut 20c forms a threaded engagement with the top of the pin 20f, pressing the pressure plate 20d tightly onto the outward flange on the upper part of the limiting sleeve 20e. Thus, a limiting sleeve 20e made of high-strength rubber with a large damping coefficient is filled between the base plate d and the pin 20f; when the equipment experiences horizontal swaying vibration, the base plate d sways accordingly, and is ultimately absorbed by the damping of the limiting sleeve 20e, eliminating the impact of horizontal swaying vibration on the surrounding environment.

[0044] II. Weighing Components 30

[0045] Weighing sensors 31 are widely used in engineering, such as in various storage tanks, reactors, and dynamic production lines; however, in horizontal centrifuges, especially in long cantilever horizontal centrifuges, due to equipment vibration, large self-weight, and high detection accuracy requirements, there is still no good mature solution.

[0046] The technical solution of this invention can effectively solve the above problems; the core of the weighing component 30 is preferably a weighing sensor 31; in actual selection, the type can be S-type, cantilever beam type, bridge type, etc. In the use of long cantilever horizontal centrifuges, the maximum range of the weighing sensor 31 generally does not exceed 2t, and explosion-proof certification is required in explosion-proof environments.

[0047] During assembly, taking into account the installation height of the load cell 31, the load cell 31 can be positioned as follows: Figure 3-4 The support 11 is fixed inside the bottom bracket 10; holes are installed on the bottom bracket 10 to allow the pressure rod 33a to pass through. A pressure block 35 is provided at the detection point of the load cell 31, and the joint hole 33c at the lower end of the adjusting screw 33b is connected to the pressure block 35 through a positioning pin. The joint hole 33c ensures that the adjusting screw can swing left and right relative to the pressure block 35. Figure 4In this structure, the external thread at the upper end of the adjusting screw 33b engages with the threaded hole of the pressure rod 33a, forming a threaded pair structure. This threaded pair structure enables vertical distance adjustment. The upper end of the pressure rod 33a is hinged to the connector 32a via a horizontal pin 33d, allowing the pressure rod 33a to swing back and forth relative to the connector 32a at the vibration damping part 32. Thus, the pressure rod 33a has four degrees of freedom in the forward, backward, left, and right directions, meaning it can swing in all directions, thereby eliminating errors caused by installation and vibration, ensuring that the pressure block 35 always maintains a stable, vertical force applied towards the detection point. An elastic damping vibration isolator, consisting of an elastic element and a damper, is fixed above the pressure rod 33a. This absorbs most of the equipment vibration, preventing it from affecting the weight detection accuracy. The elastic element can be a cylindrical spring, conical spring, leaf spring, gas spring, etc., and the damper can be rubber, heavy oil, viscous liquid, etc.

[0048] During actual installation of the weighing assembly 30, the adjusting screw 33b must first be fully screwed into the thread of the pressure rod 33a. The long cantilever horizontal centrifuge is vertically mounted on the bottom support 10 at three points and secured securely. The bottom support 10 typically has four support legs. Because the adjusting screw is fully screwed into the thread of the pressure rod 33a, the pressure block 35 is not in contact with the detection point of the weighing sensor 31 at this time. After the equipment is securely fixed on the bottom support 10, the adjusting screw 33b is adjusted to lower the pressure block 35, making it contact and slowly press against the detection point of the weighing sensor 31 until the value displayed by the weighing sensor 31 reaches more than 50% of its range. After adjustment, the long cantilever horizontal centrifuge is in a balanced state. When material enters the centrifuge chamber of rotor a, the balance is broken, and the detection value of the weighing sensor 31 reflects the feed amount. To prevent the detection point of the weighing sensor 31 from being damaged by accidental or sudden abnormal fluctuations, a limit protection rod 34 can be provided at the bottom of the detection point, and the limit protection rod 34 can be adjusted.

[0049] To further illustrate the relationship between the detection value of the weighing sensor 31 and the feed rate, the following is established here: Figure 6 The coordinate system shown is a planar coordinate system with the Y-axis set on the vertical plane and the X-axis set on the bottom surface of the base plate d.

[0050] Based on the principle of torque balance, the position of the overall center of mass of the long cantilever horizontal centrifuge can be calculated:

[0051] Σm i X i =MX…Formula 1

[0052] Σm i Y i =MY…Form 2

[0053] M=Σm i …Formula 3

[0054] Where: m iThe mass of each component is expressed in kg.

[0055] X i The values ​​are the X-axis coordinates of each component, in mm.

[0056] Y i These are the Y-axis coordinates of each component, in mm.

[0057] M represents the total mass of the equipment, in kg.

[0058] X is the x-coordinate of the centroid;

[0059] Y is the ordinate value of the centroid.

[0060] It is known that when designing a centrifuge, by rationally designing structural parameters and arranging the positions of various components, such as the positions of the main and auxiliary motors, the center of gravity of the equipment can be located as close as possible to the middle of the whole machine, thus achieving a balanced weight distribution.

[0061] The feed rate of the equipment is m. At this time, the internal mass of rotor a increases by m accordingly, while the mass of other components remains unchanged. The X-axis coordinate values ​​of each component also remain unchanged, but the position of the overall center of mass of the equipment changes, that is, the center of mass changes position in the X-axis coordinate value as follows: Figure 6 The displacement ΔX is shown.

[0062] At this point, according to the principle of torque balance, Σm i X i =MX, that is:

[0063] Σm i-1 X i-1 +m 转子a X 转子a =MX…Form 4

[0064] After feeding m, we have:

[0065] Σm i-1 X i-1 +(m 转子a +m)X 转子a = (M+m)(X-ΔX)…Equation 5

[0066] After the center of mass moves forward, the force on the elastic vibration isolation point changes. For ease of calculation, assume that after feeding, the total force on the front elastic vibration isolation point 21 is F. 前 The distance from the center of mass to the front elastic vibration isolation point 21 is L. 前 The total force on the rear elastic vibration isolation point 22 is F. 后 The distance from the center of mass to the rear elastic vibration isolation point 22 is L. 后 At this moment, the forces acting in the X direction are as follows:

[0067] After feeding, based on the balance of forces and torques, we have:

[0068] F 前 +F 后 = (M+m)g…Equation 6

[0069] F 前 (L 前 -ΔX)=F 后 (L 后 +ΔX)…Equation 7

[0070] Combining equations 1 through 7, we can obtain the following simplified equation:

[0071] F 后 =am+b…Equation 8

[0072] Where a and b are constants, and are related to the weight acceleration g and L. 前 L 后 M, X, X 转子 The value is related to the feed rate. Therefore, according to Equation 8, for a long cantilever horizontal centrifuge with a fixed specification and technical parameters, the detection value of the weighing component 30 installed at the rear of the equipment is linearly related to the feed rate. That is, the actual feed rate m can be obtained from the analog signal detected by the weighing sensor 31 through a linear relationship.

[0073] In summary, this invention accurately reflects the actual material weight within rotor a even when using the weighing sensor 31. Furthermore, it leverages the advantages of the weighing sensor 31 to facilitate optimized feed control. In use, by setting maximum and minimum feed values, multiple small-batch feedings can be achieved, ensuring the maximum filter cake size is always maintained. For materials with good filtration performance, when the feed in rotor a reaches the set maximum value of the weighing sensor 31, the weighing sensor 31 sends a signal to automatically close the feed valve, and rotor a dehydrates at high speed for several seconds. Then, it automatically feeds again to the set maximum value; this process is repeated multiple times until the filter cake in rotor a reaches its maximum volume. Through multiple feedings, maximum single-batch capacity can be achieved, significantly improving actual production efficiency.

[0074] Of course, those skilled in the art will recognize that the present invention is not limited to the details of the exemplary embodiments described above, but also includes the same or similar structures that can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0075] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0076] The technologies, shapes, and structures not described in detail in this invention are all known technologies.

Claims

1. A long-suspension horizontal centrifuge based on eccentric-weighing type feeding device, characterized in that: The three-point structure includes two groups of front end elastic vibration isolation points (21) and one group of rear end elastic vibration isolation points (22), and the gravity center and the mass center of the long cantilever horizontal centrifuge are located in a triangle formed by the line connecting the three-point structure to each other; in the rotor axial direction, the front end elastic vibration isolation points (21) are arranged on the mass center rotor side, and the two groups of front end elastic vibration isolation points (21) are symmetrically arranged along the rotor axis; the rear end elastic vibration isolation point (22) is arranged on the opposite side of the mass center rotor side, and the rear end elastic vibration isolation point (22) is eccentrically arranged relative to the rotor axis; the bottom support (10) on the opposite side of the rear end elastic vibration isolation point (22) is further provided with a weighing assembly (30) for measuring the downward pressure and / or upward tension of the bottom plate.

2. The long-throw horizontal bowl centrifuge based on eccentric load cells feed arrangement according to claim 1, characterized in that: The weighing assembly (30) includes a weighing sensor (31) fixed on the bottom support (10); the detection point of the weighing sensor (31) faces upward, and from bottom to top, a pressing block (35) for pressing on the detection point, an intermediate connecting rod above the pressing block (35), and a damping part (32) for damping function in hinged cooperation with the top end of the intermediate connecting rod are sequentially arranged; the damping part (32) is fixed at the bottom plate, and the bottom end of the intermediate connecting rod is in hinged cooperation with the pressing block (35); the hinge axes at the hinges of the two ends of the intermediate connecting rod intersect with each other.

3. The long-throw horizontal bowl centrifuge based on eccentric-weighing feed arrangement according to claim 2, characterized in that: The bottom support (10) is provided with a support seat (11), and the weighing sensor (31) is arranged on the support seat (11); the intermediate connecting rod includes a pressing rod (33a) and an adjusting screw rod (33b) coaxially screwed in the threaded hole of the pressing rod (33a); the bottom end of the adjusting screw rod (33b) is provided with a joint hole (33c), so as to form hinged cooperation with the positioning pin at the pressing block (35); the top end of the pressing rod (33a) penetrates through the table top of the bottom support (10), and then is hinged on the connector (32a) at the bottom end of the damping part (32) through a horizontal pin (33d).

4. The long-throw horizontal bowl centrifuge based on eccentric-weighing feed arrangement according to claim 2, characterized in that: The damping part (32) is an elastic damping vibration isolator.

5. The long-throw horizontal bowl centrifuge based on eccentric-weighing feed device according to claim 2 or 3 or 4, characterized in that: The weighing sensor (31) is S-shaped, cantilever beam type or bridge type.

6. A long-throw horizontal centrifuge based on eccentrically loaded feed devices according to claim 2 or 3 or 4, characterized in that: A limiting protection rod (34) is screwed on the bottom support (10), and the top end of the limiting protection rod (34) extends vertically upward and abuts against the back of the detection point.

7. The long-throw horizontal bowl centrifuge based on eccentric load cell feed arrangement according to claim 1 or 2 or 3 or 4, characterized in that: Each elastic vibration isolation point is a three-point installation structure, including two vertical vibration isolators (20a) and one horizontal vibration isolator (20b) constituting three points; the symmetry plane of the two vertical vibration isolators (20a) is located on a vertical plane parallel to the rotor axis, and the axis of the horizontal vibration isolator (20b) coincides with the vertical plane.

8. The long-throw horizontal bowl centrifuge based on eccentric load cells feed arrangement according to claim 7, characterized in that: The horizontal vibration isolator (20b) includes a nut (20c), a pressing disc (20d), a limiting sleeve (20e) and a column pin (20f) sequentially arranged from top to bottom along the vertical direction; the limiting sleeve (20e) is coaxially installed in the mounting hole at the bottom plate, the column pin (20f) sequentially penetrates through the limiting sleeve (20e) and the pressing disc (20d) from bottom to top, and finally forms a threaded cooperation with the nut (20c).

9. The long-throw horizontal bowl centrifuge based on eccentric load cells feed arrangement of claim 7, characterized in that: The vertical vibration isolator (20a) is an elastic damping vibration isolator.

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