Roller press accumulator mushroom valve structure

Abstract

The utility model relates to cement grinding equipment's technical field especially, and it is a kind of roll press energy accumulator fungus valve structure, including valve body and valve rod, valve rod is located inside valve body, the top of valve rod is fixed with valve rod head, is set with multiple arc pressure relief holes on valve rod head, multiple arc pressure relief holes are evenly distributed along the circumferential direction of valve rod head, and arc pressure relief hole edge smooth transition. After roll press energy accumulator fungus valve adopts arc pressure relief hole structure, roll press energy accumulator uses well, solves the phenomenon that hydraulic oil is not released from energy accumulator caused by the instantaneous rapid fluctuation of roll press roll gap, improves work efficiency. The setting of support To can stably support air bag, and improve the service life of air bag.

Description

Technical Field

[0001] This utility model relates to the technical field of cement grinding equipment, and in particular to an accumulator mushroom valve structure for a roller press. Background Technology

[0002] Accumulators are essential components in the hydraulic system of roller presses, serving to buffer and dampen shocks. During roller press operation, phenomena such as material segregation frequently cause rapid fluctuations in the roller gap, leading to synchronous and rapid pressure fluctuations in the left and right chambers. This can eventually cause the accumulator's valve to lock, preventing the hydraulic oil from being released. The normal operation of the roller press is significantly affected by process factors. For example, when the roller gap drops instantly from 30mm to 15mm, the hydraulic oil stored in the accumulator needs to be replenished to the hydraulic cylinder immediately. Due to the rapid flow rate, the hydraulic oil may lock the accumulator's valve, preventing the hydraulic oil from being properly replenished to the hydraulic cylinder, thus rendering the roller press's hydraulic buffering system ineffective.

[0003] Current handling method: Test the pressure inside the accumulator. When the pressure is <10MPa, manually start the hydraulic pump to pressurize the chamber containing the accumulator until the pressure reaches 12MPa. Stop pressurizing and slowly release the pressure in the chamber manually. After depressurization, test the pressure inside the accumulator. If the accumulator pressure is the same as the original nitrogen pressure, it indicates that the accumulator valve has opened and the accumulator can work normally. If the accumulator pressure does not decrease, it indicates that the accumulator valve has not opened, and the nitrogen inside the accumulator needs to be released before disassembling and inspecting the accumulator. When the accumulator pressure is >10MPa, the nitrogen inside the accumulator needs to be released until the accumulator pressure is <10MPa, following the steps above. The above operation method is relatively complex and must be performed while the roller press is stopped. Utility Model Content

[0004] In order to solve the problems existing in the prior art, the present invention provides an accumulator mushroom valve structure for a roller press that can automatically release pressure without stopping the machine.

[0005] This utility model provides a mushroom-shaped valve structure for a roller press accumulator, which adopts the following technical solution: A mushroom-shaped valve structure for a roller press accumulator includes a valve body and a valve stem. The valve stem is located inside the valve body, and a valve stem head is fixed to the top of the valve stem. Multiple arc-shaped pressure relief holes are opened on the valve stem head. The multiple arc-shaped pressure relief holes are evenly distributed along the circumference of the valve stem head, and the edges of the arc-shaped pressure relief holes are smoothly transitioned.

[0006] Optionally, a support bracket is fixed to the top of the valve stem head. The top surface of the support bracket is a concave arc surface. After the air bladder inflates, the bottom of the air bladder contacts the concave arc surface.

[0007] Optionally, a fixing plate is fixedly connected to the inner wall of the valve body. Multiple oil discharge holes are evenly distributed along the circumference of the fixing plate. The valve stem passes through the center of the fixing plate. A locking nut is located at the bottom of the fixing plate and is threaded to the valve stem. A spring is fitted onto the valve stem, positioned between the valve stem head and the fixing plate. A sliding ring is fixed to the valve stem, located between the fixing plate and the locking nut. A connecting sleeve is located below the fixing plate, and the sliding ring is slidably connected to the connecting sleeve. Optionally, the bottom of the fixing plate is provided with a mounting hole, one end of the connecting sleeve is inserted into the mounting hole, the outer wall of the connecting sleeve is provided with an external thread, and the wall of the mounting hole is provided with an internal thread that mates with the external thread.

[0008] Compared with the prior art, the present invention has the following technical effects: After adopting an arc-shaped pressure relief hole structure for the mushroom-shaped valve of the roller press accumulator, the roller press accumulator performed well, solving the problem of hydraulic oil not being released from the accumulator due to the instantaneous rapid fluctuation of the roller gap, thus improving work efficiency. The support bracket provides stable support for the airbag and extends its service life. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this utility model; Figure 2 This is a schematic diagram of the internal structure of the valve body in Embodiment 1 of this utility model; Figure 3 This is a schematic diagram of the valve stem head and the arc-shaped pressure relief hole in Embodiment 1 of this utility model; Figure 4 This is a structural schematic diagram of Embodiment 2 of the present invention; Figure 5 This is a schematic diagram of the sliding ring and connecting sleeve in Embodiment 2 of this utility model.

[0010] Explanation of reference numerals in the attached drawings: 1. Valve body; 2. Valve stem; 21. Spring; 3. Valve stem head; 31. Arc-shaped pressure relief hole; 4. Locking nut; 5. Fixing plate; 51. Oil discharge hole; 52. Mounting hole; 6. Support bracket; 61. Concave arc surface; 7. Sliding ring; 8. Connecting sleeve; 81. Pulley. Detailed Implementation

[0011] The following is in conjunction with the appendix Figure 1 - Appendix Figure 5 The present invention will be described in further detail below.

[0012] Embodiment 1 of this utility model Reference Figures 1-3This utility model discloses an accumulator mushroom valve structure for a roller press, including a valve body 1 and a valve stem 2. The valve stem 2 is located inside the valve body 1, and a valve stem head 3 is fixed to the top of the valve stem 2. A fixing plate 5 is fixedly connected to the inner wall of the valve body 1. The fixing plate 5 has multiple oil discharge holes 51, which are evenly distributed along the circumference of the fixing plate 5. The valve stem 2 passes through the center of the fixing plate 5 and can move up and down.

[0013] A locking nut 4 is provided at the bottom of the fixing plate 5. The locking nut 4 is threadedly connected to the valve stem 2. When the mushroom valve is opened, the locking nut 4 presses against the bottom of the fixing plate 5. A spring 21 is sleeved on the valve stem 2, and the spring 21 is located between the valve stem head 3 and the fixing plate 5. The mushroom valve is in the open state under the action of the spring 21.

[0014] Three arc-shaped pressure relief holes 31 are provided on the valve stem head 3. The three arc-shaped pressure relief holes 31 are evenly distributed along the circumference of the valve stem head 3. The edges of the arc-shaped pressure relief holes 31 are smoothly transitioned. When the mushroom valve is locked, hydraulic oil can be released normally from the arc-shaped pressure relief holes 31, thereby making the pressure of the accumulator and the corresponding hydraulic cylinder consistent, and the mushroom valve opens accordingly. The smooth transition of the edges of the arc-shaped pressure relief holes 31 reduces the possibility of air bladder rupture when it comes into contact with the arc-shaped notch in the accumulator.

[0015] The method for manufacturing the arc-shaped pressure relief hole is as follows: use an electric grinder to grind three arc-shaped notches (notch length 8mm, width 3mm) on the valve stem head 3 of the accumulator's mushroom valve, and then use an angle grinder to smooth these three notches into a smooth transition (without sharp edges). This allows the hydraulic oil to be released normally from the arc-shaped notches after the mushroom valve inside the accumulator is locked.

[0016] The dimensions of this arc-shaped notch were determined through multiple tests. The nitrogen bladder inflation pressure was approximately 6 MPa. When the arc-shaped notch was too small, the hydraulic oil return in the accumulator was slow after the mushroom valve got stuck, preventing the accumulator from being adjusted to normal operating conditions in time. This caused the accumulator to malfunction, resulting in excessive vibration and shutdown of the roller press. When the arc-shaped notch was too large, the inflated nitrogen bladder frequently collided with the notch, easily damaging the nitrogen bladder at the contact points and shortening its service life. Therefore, the final dimensions of the arc-shaped notch on the mushroom valve were set at 8 mm in length and 3 mm in width.

[0017] After adopting the arc-shaped pressure relief hole structure for the mushroom-shaped valve of the roller press accumulator, the roller press accumulator is performing well. This solves the problem of hydraulic oil not being released from the accumulator due to the instantaneous rapid fluctuation of the roller gap, thus improving work efficiency.

[0018] Embodiment 2 of this utility model The difference from Embodiment 1 is that a support bracket 6 is fixed to the top of the valve stem head 3. The top surface of the support bracket 6 is a concave arc surface 61. After the airbag inflates, the bottom of the airbag contacts the concave arc surface 61. The diameter of the support bracket 6 is larger than the diameter of the valve stem head 3. The support bracket 6 serves two purposes: one is to support the airbag, and the other is to prevent the bottom of the airbag from contacting the arc-shaped pressure relief hole 31. Frequent contact between the airbag and the arc-shaped pressure relief hole 31 can easily damage the airbag. The support bracket 6 increases the service life of the airbag.

[0019] A sliding ring 7 is provided below the fixed plate 5. The sliding ring 7 is fixed to the valve stem 2 and is located above the locking nut 4. A connecting sleeve 8 is provided below the fixed plate 5. A mounting hole 52 is provided at the bottom of the fixed plate 5. One end of the connecting sleeve 8 is inserted into the mounting hole 52. An external thread is provided on the outer wall of the connecting sleeve 8, and an internal thread that mates with the external thread is provided on the wall of the mounting hole 52.

[0020] The sliding ring 7 is located inside the connecting sleeve 8 and can slide up and down along the inner wall of the connecting sleeve 8. When the valve is opened or closed, the valve stem 2 moves up or down, and the sliding ring 7 moves up or down along the inner wall of the connecting sleeve 8. The sliding ring 7 increases the stability of the valve stem 2 when it moves up and down. A lever 81 is fixed on the outer wall of the connecting sleeve 8. When it is necessary to disassemble the connecting sleeve 8, rotating the lever 81 makes it easy to remove the connecting sleeve 8.

[0021] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A mushroom-shaped valve structure for an accumulator used in a roller press, characterized in that: It includes a valve body (1) and a valve stem (2). The valve stem (2) is located inside the valve body (1). A valve stem head (3) is fixed on the top of the valve stem (2). Multiple arc-shaped pressure relief holes (31) are opened on the valve stem head (3). The multiple arc-shaped pressure relief holes (31) are evenly distributed along the circumference of the valve stem head (3). The edges of the arc-shaped pressure relief holes (31) are smoothly transitioned.

2. The accumulator mushroom valve structure for a roller press according to claim 1, characterized in that: The valve stem head (3) is fixed with a support bracket (6). The top surface of the support bracket (6) is a concave arc surface (61). After the airbag is inflated, the bottom of the airbag contacts the concave arc surface (61).

3. The accumulator mushroom valve structure for a roller press according to claim 1 or 2, characterized in that: A fixing plate (5) is fixedly connected to the inner wall of the valve body (1). Multiple oil discharge holes (51) are opened on the fixing plate (5). The multiple oil discharge holes (51) are evenly distributed along the circumference of the fixing plate (5). The valve stem (2) passes through the center of the fixing plate (5). A locking nut (4) is provided at the bottom of the fixing plate (5). The locking nut (4) is threadedly connected to the valve stem (2). A spring (21) is sleeved on the valve stem (2). The spring (21) is located between the valve stem head (3) and the fixing plate (5). A sliding ring (7) is fixed on the valve stem (2). The sliding ring (7) is located between the fixing plate (5) and the locking nut (4). A connecting sleeve (8) is provided below the fixing plate (5). The sliding ring (7) is slidably connected to the connecting sleeve (8).

4. The accumulator mushroom valve structure for a roller press according to claim 3, characterized in that: The bottom of the fixing plate (5) is provided with a mounting hole (52). One end of the connecting sleeve (8) is inserted into the mounting hole (52). The outer wall of the connecting sleeve (8) is provided with an external thread, and the wall of the mounting hole (52) is provided with an internal thread that mates with the external thread.

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