Safety valve for cement bin

Abstract

The utility model belongs to the technical field of cement bins, and particularly relates to a safety valve for a cement bin, which comprises a valve body, a valve cover and a balancing weight, the valve cover is used for covering the valve body, the valve body is provided with a vertically through pressure relief channel, and a guide frame is arranged in the pressure relief channel. The valve cover is provided with a valve rod connected to the guide frame in a sliding mode, the valve rod moves downwards relative to the guide frame to close the pressure relief channel, and the valve rod moves upwards relative to the guide frame to open the pressure relief channel. The balancing weight is adjustably connected to the valve cover and used for adjusting the minimum value of the valve cover jacked up by air pressure. The safety valve is used for solving the technical problems that an existing cement bin lacks a safety valve for pressure relief, and bin explosion accidents are prone to occurring.

Description

TECHNICAL FIELD

[0001] The utility model belongs to cement bin technical field, concretely relates to a safety valve for cement bin. BACKGROUND

[0002] Cement bin is the storage equipment in the process of bulk cement use, it is a closed tank, generally for cylindrical support structure, main component includes: bin steel structure part, ladder, guardrail, feeding pipe, dust collector, safety valve, high and low material level meter, arch breaking pipeline, unloading valve etc. Bulk cement truck transports the cement in the tank from the feeding pipe to the cement bin through gas pressure, or eliminates the "arch" phenomenon in the process of discharging through blowing, gas will enter the cement bin, once the exhaust is not smooth, causes the pressure difference between the cement bin and the outside atmospheric pressure to reach the abnormal condition, the safety valve will open automatically, prevents the occurrence of the explosion accident, after the pressure restores to normal, the safety valve restores automatically. In fact, most of the current civil cement bins do not install dust collector and safety valve, only design a vent hole on the top of the bin, this avoids the occurrence of the explosion accident caused by the positive pressure in the bin, but causes the pollution to the environment, and is also an economic waste.

[0003] Therefore, to solve the above problems, the safety valve capable of opening at high pressure is provided, which releases the pressure of the cement bin and avoids the explosion accident. CONTENT OF THE UTILITY MODEL

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a safety valve for cement bin, which solves the technical problem that the current cement bin lacks safety valve for pressure relief and is prone to explosion accidents.

[0005] To achieve the above purpose, the technical scheme of the utility model is as follows: a safety valve for cement bin, the safety valve comprises a valve body, a valve cover for covering the valve body and a counterweight, the valve body is provided with an up-down through pressure relief channel, the pressure relief channel is provided with a guide frame, the valve cover is provided with a valve rod slidingly connected to the guide frame, the valve rod moves downward relative to the guide frame to close the pressure relief channel, and the valve rod moves upward relative to the guide frame to open the pressure relief channel; the counterweight is adjustably connected to the valve cover and used for adjusting the minimum value of the valve cover lifted by the air pressure.

[0006] Preferably, the guide frame comprises an upper guide frame and a lower guide frame, the upper guide frame and the lower guide frame are arranged in an up-down interval, and the valve rod passes through the connecting holes arranged on the upper guide frame and the lower guide frame to realize the sliding connection between the valve rod and the guide frame.

[0007] Preferably, the end of the valve rod away from the valve cover is provided with a stop plate which is in stop cooperation with the lower guide frame.

[0008] Preferably, a first buffer pad is arranged on one side of the stop plate close to the lower guide frame.

[0009] Preferably, a second buffer pad is arranged on the upper end of the valve body.

[0010] Preferably, the counterweight is sleeved on the screw rod arranged on the top of the valve cover and is pressed by a nut to achieve adjustable connection with the valve cover.

[0011] Preferably, a downwardly inclined baffle plate is arranged in the valve body below the lower guide frame to change the direction of gas flow and block powder in the gas.

[0012] Preferably, the baffle plate is provided with at least two baffle plates arranged alternately on the inner wall of the pressure relief channel.

[0013] The beneficial effects of the technical scheme of the utility model are as follows:

[0014] The utility model is arranged on the top of the cement bin, when the air pressure in the cement bin increases and the pressure value is greater than the gravity of the valve cover and the counterweight, the air pressure lifts the valve cover to separate from the valve body, the pressure relief channel is opened to release pressure, effectively preventing the explosion of the bin and improving safety. The guide frame is arranged in the pressure relief channel of the valve body, the valve rod arranged on the valve cover is slidingly connected to the guide frame, when the air pressure in the cement bin reaches a certain value, the valve rod moves upward relative to the guide frame to drive the valve cover to separate from the valve body, the pressure relief channel is opened to release pressure, when the air pressure decreases, the valve cover moves downward under the action of gravity to close the pressure relief channel, the opening and closing of the pressure relief channel are automatically completed, preventing the explosion of the bin while improving the convenience of use; the counterweight is adjustably arranged on the valve cover, by adjusting the weight of the counterweight, the minimum air pressure for lifting the valve cover is realized, so as to be applicable to different cement bins and improve the application range. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is an embodiment of a safety valve for a cement bin.

[0016] Figure 2 It is an embodiment of a safety valve for a cement bin. Figure 1 It is an embodiment of a safety valve for a cement bin.

[0017] Among them, Figure 1 , 2 1-valve cover, 2-counterweight, 3-valve rod, 4-stop plate, 5-first buffer pad, 6-valve body, 7-second buffer pad, 8-upper guide frame, 9-lower guide frame, 10-baffle plate, 11-screw rod, 12-nut. DETAILED DESCRIPTION

[0018] Clearly and completely describe the technical scheme in the embodiments of the utility model with reference to the drawings in the embodiments of the utility model, obviously, the described embodiments are only some of the embodiments of the utility model, not all the embodiments, and do not limit the scope of the utility model.

[0019] In the description of the utility model, it needs to be explained that the orientation or position relation indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relation shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model. The terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0020] In the description of the utility model, it needs to be explained that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be mechanical connection, or electrical connection, it can be directly connected, or indirectly connected through intermediate medium, it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0021] The specific implementation is as follows:

[0022] Embodiment 1, as shown in Figure 1 , 2 A safety valve for a cement bin, the safety valve comprises a valve body 6, a valve cover 1 and a counterweight 2. The valve body 6 is provided with a pressure relief channel penetrating up and down. The valve body 6 is used to be connected at the top of the cement bin, and is communicated with the space in the cement bin through the pressure relief channel. A guide frame is horizontally arranged in the pressure relief channel, and a valve rod 3 is slidably connected to the guide frame, and the valve rod 3 is vertically connected to the top of the valve cover 1. The valve rod 3 slides upward relative to the guide frame, drives the valve cover 1 to slide upward and separate from the top end of the valve body 6, and the pressure relief channel is opened for pressure relief; the valve rod 3 slides downward relative to the guide frame, drives the valve cover 1 to abut against the top end of the valve body, and the pressure relief channel is closed.

[0023] In addition, the counterweight 2 can be adjustably arranged at the top end of the valve cover 1, and the weight of the counterweight 2 can be adjusted according to the need, so as to adjust the minimum air pressure required for lifting the valve cover 1 upward, and when the air pressure in the cement bin is greater than the minimum air pressure, the valve cover can be lifted. In this way, appropriate counterweights can be replaced according to different cement bins or use environment, so as to expand the application range of the safety valve.

[0024] The safety valve for the cement bin in the embodiment is used by connecting the valve body 6 to the top of the cement bin, and communicating with the space in the cement bin through the pressure relief channel. When the air pressure in the cement bin reaches a certain value, the air pressure will lift the valve cover 1 upward to separate from the valve body 6, the pressure relief channel is opened to start pressure relief, so as to avoid the situation of the explosion of the cement bin, and improve the safety of the cement bin. In addition, the counterweight 2 can adjust the weight according to the needs, so as to adjust the air pressure capable of lifting the valve cover 1, and expand the application range of the safety valve.

[0025] Further, the guide frame includes an upper guide frame 8 and a lower guide frame 9. The upper guide frame 8 and the lower guide frame 9 are arranged in parallel and spaced apart from top to bottom, connected in the pressure relief channel, and the valve rod 3 passes through the connecting holes arranged on the upper guide frame 8 and the lower guide frame 9, which not only ensures the adjustable connection between the valve cover 1 and the valve body 6, but also ensures the linearity of the upward and downward movement of the valve rod 3, thereby improving the reliability of the opening and closing of the pressure relief channel.

[0026] Further, the stop plate 4 is vertically connected to the lower end of the valve rod 3, and the stop plate 4 is larger than the connecting hole, so as to realize the stop cooperation between the stop plate 4 and the lower guide frame 9, and avoid the sliding of the valve cover 1 and the valve body 6 due to excessive air pressure.

[0027] Further, the first buffer pad 5 is arranged on the side of the stop plate close to the lower guide frame 9, so as to provide a buffer between the stop plate 4 and the lower guide frame 9, reduce the collision damage, and prolong the service life of the guide frame 9 and the stop plate 4.

[0028] Further, the second buffer pad 7 is arranged on the top end of the valve body 6, so as to provide a buffer between the valve body 6 and the valve cover 1, reduce the collision damage, and prolong the service life of the valve cover 1 and the valve body 6.

[0029] Further, the screw rod 11 is vertically connected to the top end of the valve cover 1, the counterweight 2 is sleeved on the screw rod 11, and the threaded nut 12 is connected to the screw rod 11, so as to realize the adjustable connection of the counterweight 2 on the valve cover 1, so as to replace the counterweight with different weights.

[0030] Embodiment 2, as shown in FIGS. 1 and 2, a safety valve for a cement bin, which is different from embodiment 1 in that a baffle plate 10 is arranged below the lower guide frame 9 in the pressure relief channel. The baffle plate 10 is arranged in accordance with the shape of the pressure relief channel and does not completely block the pressure relief channel. The baffle plate 10 is arranged downwardly inclined, which has a certain resistance and guidance effect on the flow direction of the gas in the pressure relief channel. At the same time, the cement dust in the gas is intercepted after colliding with the baffle plate 10, which reduces the dust from the safety valve, and in turn reduces the influence on the environment outside the cement bin. The other structures are not described again.

[0031] Further, the baffle plate 10 is provided with at least two, and the two baffle plates 10 are alternately arranged in the pressure relief channel, realizing S-shaped flow of the gas in the pressure relief channel, and ensuring the interception effect on the dust.

[0032] In the embodiment, the guide part is arranged at the end of the baffle plate 10 and is upwardly and arcuately bent, so as to ensure smooth gas flow.

[0033] The utility model is described exemplarily above in combination with the drawings, and obviously, the specific implementation of the utility model is not limited by the above-mentioned mode, as long as various non-essential improvements are adopted by using the technical scheme of the utility model, or the concept and technical scheme of the utility model are directly applied to other occasions without improvement, which are all within the protection scope of the utility model.

Claims

1. A safety valve for a cement silo, characterized in that, The safety valve includes a valve body, a valve cover for covering the valve body, and a counterweight. The valve body is provided with a pressure relief channel that extends vertically. A guide frame is provided in the pressure relief channel. The valve cover is provided with a valve stem that is slidably connected to the guide frame. The valve stem moves downward relative to the guide frame to close the pressure relief channel, and moves upward relative to the guide frame to open the pressure relief channel. The counterweight is adjustablely connected to the valve cover and is used to adjust the minimum value at which the valve cover is lifted by air pressure.

2. A safety valve for a cement silo according to claim 1, characterized in that, The guide frame includes an upper guide frame and a lower guide frame, which are spaced apart vertically. The valve stem passes through the connecting holes provided on the upper and lower guide frames to achieve a sliding connection between the valve stem and the guide frame.

3. A safety valve for a cement silo according to claim 2, characterized in that, A stop plate is provided at the end of the valve stem away from the valve cover, which cooperates with the lower guide frame for blocking.

4. A safety valve for a cement silo according to claim 3, characterized in that, A first buffer pad is provided on the side of the stop plate near the lower guide frame.

5. A safety valve for a cement silo according to claim 1, characterized in that, A second buffer pad is provided at the upper end of the valve body.

6. A safety valve for a cement silo according to claim 1, characterized in that, The counterweight is fitted onto the screw on the top of the valve cover and tightened by a nut to achieve an adjustable connection with the valve cover.

7. A safety valve for a cement silo according to claim 2, characterized in that, The valve body is provided with a downwardly inclined baffle plate located below the lower guide frame, which is used to change the gas flow direction and block powder in the gas.

8. A safety valve for a cement silo according to claim 7, characterized in that, At least two baffles are provided, which are alternately arranged on the inner wall of the pressure relief channel.

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