High-pressure hydraulic press machine Screw lock pressure filter
The high-pressure hydraulic press machine with a geared motor-driven lock nut system addresses energy wastage and mechanical damage by automating pressure maintenance, ensuring stable filtration pressures in large-scale operations.
Patent Information
- Application Number
- JP2025004164U
- Authority / Receiving Office
- JP · JP
- Patent Type
- Utility models
- Current Assignee / Owner
- Filing Date
- 2025-12-02
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-12-02
AI Technical Summary
Existing high-pressure filters face issues with energy wastage and mechanical damage due to frequent motor activation to maintain pressure, and manual locking mechanisms are inadequate for large-scale operations.
A high-pressure hydraulic press machine with a screw lock pressure filter featuring a geared motor-driven lock nut system, clamping plates, and position limit sensors to maintain pressure automatically, reducing manual intervention and preventing backward movement of the piston rod.
The system ensures stable pressure maintenance during long filtration cycles, enhancing safety and efficiency by automating the locking process and preventing mechanical damage.
Smart Images
Figure 0003254630000001_ABST
Abstract
Description
[Technical Field]
[0001] This invention relates to a high-pressure hydraulic press machine, a screw lock pressure filter, and belongs to the field of pressure filters. [Background technology]
[0002] When the press filter is operating, the press cylinder attached to the press filter base presses the filter plate, and the material is injected into the filtration chamber by the supply pump. Due to the pressure of the supply pump, the pressure in the filtration chamber increases and is maintained for a certain period of time. Due to the filtering action of the filter cloth, the filtrate enters the pipe through the filter cloth and is discharged, and the solid part cannot pass through the filter cloth and remains in the filtration chamber to form a filter cake.
[0003] In some industries, the long compression time and large compression pressure require large hydraulic cylinders to meet the requirements. Wear of the sealing parts in the hydraulic system will lead to leakage of the cylinder, and when the pressure is not up to the required value, the motor will frequently start to supplement the pressure to the cylinder, which not only wastes energy but also makes it easy for the pressure to escape, causing damage to the filter plate or material ejection, leading to accidents.
[0004] The patent "Pressure Filter Pressing Device" (application number: 200820107075.X) discloses a pressure filter pressing device, in which the hydraulic piston rod is provided with a thread that engages with a lock nut, and after hydraulic pressing, the lock nut locks the pressure. However, because the nut must be manually tightened, this structure is only suitable for small pressure filters, and not for large pressure filters. Summary of the Invention [Problem to be solved by the invention]
[0005] The present invention aims to provide a high-pressure hydraulic press machine, a screw lock pressure filter, to solve the above-mentioned drawbacks of the background art. [Means for solving the problem]
[0006] According to the present invention, a high-pressure hydraulic press machine, a screw lock pressure filter machine, is proposed, which includes a main beam, a retaining plate, a filter plate, a press plate, a press cylinder, a press cylinder piston rod, and a press cylinder base, and the press cylinder piston rod is provided with a screw with a lock nut attached.
[0007] A first gear is provided on the lock nut, a chute is attached to the pressure plate cylinder base, a slide is provided inside the chute, a geared motor is attached to the slide, a second gear is attached to the output shaft of the geared motor, the first gear and the second gear are meshed, and clamping plates are provided on both sides of the lock nut, the outer edges of the clamping plates being larger than the outer edge of the first gear.
[0008] The clamping plates may be provided on both sides of the second gear instead of on both sides of the lock nut, and the outer edges of the clamping plates may be larger than the outer edge of the second gear.
[0009] To prevent the slide from sliding out of the chute, the slide and chute are equipped with position limit sensors.
[0010] A wear liner is mounted within the chute to reduce frictional forces as the slide moves within the chute, and preferably is a polymeric wear-resistant material.
[0011] A protective cover is provided on the outside of the first gear and the second gear, and the protective cover is attached to the geared motor.
[0012] Because the lock nut is large in size and heavy in mass, a guide neck is provided at the end of the piston rod of the pressure plate cylinder to facilitate installation. The guide neck is unthreaded and its diameter is equal to or smaller than the small diameter of the thread on the piston rod of the pressure plate cylinder.
[0013] In order to improve the transmission efficiency of the screw, it is preferable to use a rectangular or trapezoidal screw for the screw on the back plate cylinder piston rod. [Effects of the Invention]
[0014] Compared with the prior art, the advantages of this invention are as follows: the hydraulic spiral automatic locking pressurizing filter is very suitable for the field of pressurizing filtration with high pressing pressure and long pressing time; since it is automatically locked by the nut, it prevents the piston rod from moving backward by itself, effectively preventing the risk of damage to the filter plate or the spraying of filtrate caused by the piston rod moving backward due to the release of pressure from the cylinder; the nut is driven by a geared motor, which replaces manual operation, making operation safer and more reliable. [Brief explanation of the drawings]
[0015] [Figure 1] 1 is a schematic diagram of the locked state of the screw locking pressure filter nut of the high-pressure hydraulic press machine. [Figure 2] FIG. 2 is a structural schematic diagram of a lock nut. [Figure 3] FIG. 10 is a locally enlarged view of the chute, slide, and position limit sensor. [Figure 4] This is a schematic diagram of the high-pressure hydraulic press machine screw lock pressure filter nut in a loosened state. DETAILED DESCRIPTION OF THE INVENTION
[0016] The present invention will be further described below in conjunction with the drawings and examples.
[0017] FIG. 1 shows a schematic diagram of a high-pressure hydraulic press machine, a screw lock pressure filter machine, which includes a main beam 1, a retaining plate 2, a filter plate 3, a press plate 4, a retaining plate cylinder 5, a retaining plate cylinder piston rod 6, and a retaining plate cylinder base 7, and the retaining plate cylinder piston rod 6 is provided with a screw 8 to which a lock nut 9 is attached.
[0018] A first gear 10 is provided on the lock nut 9, a chute 11 is attached to the pressure plate cylinder base 7, a slide 12 is provided within the chute 11, a geared motor 13 is attached to the slide 12, a second gear 14 is attached to the output shaft of the geared motor 13, and the first gear 10 and the second gear 14 mesh with each other.
[0019] FIG. 2 is a detailed schematic diagram of the lock nut structure, with clamping plates 15a and 15b on both sides of the lock nut 9, the outer edges of which are larger than those of the first gear 10. One end of the presser cylinder piston rod 6 is fixed to the press plate 4 and is threaded, and the lock nut 9 is fastened to the presser cylinder piston rod 6. Due to the large outer shape and heavy mass of the lock nut 9, a guide neck 18 is provided at the end of the presser cylinder piston rod 6 to facilitate installation. The guide neck 18 is unthreaded, and its diameter is equal to or smaller than the minor diameter of the thread on the presser cylinder piston rod. To improve the transmission efficiency of the thread, a rectangular or trapezoidal thread is preferably used for the thread 8 on the presser cylinder piston rod 6.
[0020] Here, the function of the clamping plates is to move the geared motor through the second gear, and based on the same principle, clamping plates 15a, 15b may be provided on both sides of the second gear 14 instead of on both sides of the lock nut 9, with the outer edges of the clamping plates being larger than the outer edge of the second gear. Since the structure is similar to that provided on the lock nut, the drawings do not show such an embodiment.
[0021] A protective cover (not shown) is provided on the outside of the first gear 10 and the second gear 14 , and the protective cover is attached to the geared motor 13 .
[0022] Figure 3 is a partially enlarged view of the chute, slide, and position limit sensor, clearly showing the mounting positions of the chute, slide, wear liner, geared motor, and position limit sensor. Position limit sensors 16 are provided on the slide 12 and chute 11 to prevent the slide 12 from sliding out of the chute 11. A wear liner 17 is attached to the chute 11 to reduce the frictional force when the slide 12 moves within the chute 11. Preferably, the wear liner 17 is made of a polymeric wear-resistant material.
[0023] The present invention will be further explained below by taking into account the operating process of the pressure filter.
[0024] When the high-pressure hydraulic press screw lock pressure filter operates, the pressure plate cylinder 5 is first activated to push out the pressure plate cylinder piston rod 6, which then pushes the press plate 4 to press the filter plate 3. When a predetermined pressure is reached, the geared motor 13 is activated, driving the first gear 10 to rotate via the second gear 14, which in turn rotates the lock nut 9 and abuts the pressure plate cylinder base 7. The geared motor 13 then stops, releasing the pressure from the pressure plate cylinder 5. Because the lock nut 9 abuts the pressure plate cylinder base 7, the pressure plate cylinder piston rod 6 cannot return, and the pressure inside the filter chamber is always maintained at a predetermined level until the entire pressure filtration process is completed.
[0025] After completing one pressurized filtering cycle, the press cylinder 5 restarts and pushes out the press cylinder piston rod 6. At this time, the gap between the lock nut 9 and the press cylinder base 7 is loosened, and the geared motor 13 starts, driving the first gear 10 to rotate in the opposite direction via the second gear 14, as shown in Figure 4, to move the lock nut 9 away from the press cylinder base 7. After moving away a sufficient distance, the press cylinder 5 pulls back the press cylinder piston rod 6, completing the filter cake removal and filter cloth cleaning operations.
[0026] Although the present invention has been described with reference to preferred embodiments, various modifications may be made and equivalents may be substituted for the components therein without departing from the scope of the present invention. In particular, the technical features mentioned in each embodiment may be arbitrarily combined unless there is a structural conflict. The present invention is not limited to the specific embodiments disclosed in the specification, but includes all technical solutions within the scope of the claims.
Claims
1. a pressure plate cylinder piston rod, and a pressure plate cylinder base, wherein the pressure plate cylinder piston rod is provided with a screw to which a lock nut is attached; a first gear is attached to the lock nut; a chute is attached to the pressure plate cylinder base; a slide is provided within the chute; a geared motor is attached to the slide; a second gear is attached to the output shaft of the geared motor; the first gear and the second gear are engaged; clamping plates are provided on both sides of the lock nut; and the outer edges of the clamping plates are larger than the outer edge of the first gear.
2. 2. The high-pressure hydraulic press machine screw lock pressure filter according to claim 1, characterized in that the clamping plates are provided on both sides of the second gear, not on both sides of the lock nut, and the outer edges of the clamping plates are larger than the outer edges of the second gear.
3. 2. The high-pressure hydraulic press machine screw lock pressure filter according to claim 1, wherein the slide and the chute are provided with position limit sensors.
4. 2. The high-pressure hydraulic press machine screw lock pressure filter according to claim 1, wherein an abrasion resistant liner is installed inside the chute.
5. 2. The high-pressure hydraulic press machine screw lock pressure filter according to claim 1, wherein a protective cover is provided on the outside of the first gear and the second gear, and the protective cover is attached to a geared motor.
6. 2. The high-pressure hydraulic press machine screw lock pressure filter of claim 1, wherein the end of the pressure plate cylinder piston rod is provided with a guide neck, the guide neck is unthreaded, and the diameter of the guide neck is equal to or smaller than the small diameter of the thread on the pressure plate cylinder piston rod.
7. 2. The screw lock pressure filter of claim 1, wherein the thread of the presser cylinder piston rod is a rectangular or trapezoidal thread.
8. The high-pressure hydraulic press machine screw lock pressure filter according to claim 4, wherein the wear-resistant liner is made of a polymer wear-resistant material.