Gate valve for pulverized coal injection equipment

Abstract

The utility model relates to the technical field of gate valves, and discloses a gate valve for pulverized coal injection equipment, which comprises a bottom box, a mounting frame connected to the upper end of the outside of the bottom box, a valve core arranged in the mounting frame, chutes formed in the left and right surfaces of the inner wall of the mounting frame, slots formed in the bottom surface of the inner wall of the bottom box and communicated with the lower ends of the chutes, and an air injection component arranged in the bottom box, the air injection assembly is used for cleaning the interior of the inserting groove, a sliding assembly is arranged in the sliding groove and used for assisting sliding of the valve element, an electric push rod is installed above the installation frame, the power output end of the electric push rod is inserted into the installation frame and connected with the upper end of the valve element, and the air injection assembly comprises a spray head and a branch pipe. An air pump and a PLC are installed at the left end and the right end above the installation frame correspondingly, the upper portion and the left side of the air pump communicate with an air inlet pipe and an air outlet pipe correspondingly, and annular cavities are formed in the front end and the rear end in the bottom box correspondingly. Air injection cleaning of the inserting groove and the valve element is automatically completed, and convenience is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of gate valves, in particular to a gate valve for a pulverized coal injection device. Background Art

[0002] A gate valve is a type of valve, including manual, pneumatic, and electric opening and closing methods. The manual gate valve includes parts such as a frame, a gate plate, a lead screw, a nut, and a handwheel. The lead screw, nut, and handwheel serve as power components, while the power components of pneumatic and electric types are cylinders and electric push rods, etc. The frame can be installed in a pipeline. There is a through port for the medium to flow inside the frame. By driving the gate plate to move up and down through the power component, the through port inside the frame is blocked or exposed, thereby completing the opening and closing of the gate valve. Sealing components such as rubber gaskets for sealing are usually provided between the valve core and the through hole to ensure the overall sealing of the gate valve. A gate valve is usually also provided on a pulverized coal injection device. The gate valve for a pulverized coal injection device is usually installed between the pulverized coal injection device and the pulverized coal combustion device. When the gate valve for a pulverized coal injection device is opened, the pulverized coal of the pulverized coal injection device can be blown into the pulverized coal combustion device through the gate valve, and the pulverized coal combustion device can burn the pulverized coal. When the gate valve for a pulverized coal injection device is closed, when the user temporarily does not need to blow pulverized coal into the pulverized coal combustion device, the transportation of pulverized coal can be blocked through the gate valve. When the existing gate valve for a pulverized coal injection device is installed between the pulverized coal injection device and the pulverized coal combustion device, since the medium passing through the gate valve for a pulverized coal injection device is pulverized coal, it is difficult for existing products to achieve automatic cleaning, and pulverized coal materials are likely to accumulate at the valve core and the through port, resulting in the valve core being unable to move in and out normally, thus affecting the normal operation of the gate valve for a pulverized coal injection device. Summary of the Utility Model

[0003] The purpose of the utility model is to address the above-mentioned problems and deficiencies, and provide a gate valve for a pulverized coal injection device, which can automatically complete the jet cleaning of the slot and the valve core, and is relatively convenient.

[0004] A gate valve for a pulverized coal injection device includes a bottom box. An installation frame is connected to the upper end of the outer part of the bottom box, and a valve core is arranged inside the installation frame.

[0005] Chutes are opened on the left and right inner walls of the installation frame. A slot communicating with the lower ends of the chutes is opened on the bottom surface of the inner wall of the bottom box. A jet component is arranged inside the bottom box, and the jet component is used for cleaning the inside of the slot.

[0006] A sliding component is arranged inside the chute, and the sliding component is used to assist the sliding of the valve core.

[0007] Furthermore, an electric push rod is installed above the installation frame. The power output end of the electric push rod is inserted into the installation frame and is connected to the upper end of the valve core.

[0008] Further, the jetting assembly includes a nozzle and a branch pipe. Connecting pipes are communicated with both the front and rear ends of the bottom box, and an air pump and a PLC controller are respectively installed at the left and right ends above the mounting frame.

[0009] Further, an intake pipe and an outlet pipe are respectively communicated with the upper and left sides of the air pump. Annular cavities are formed at both the front and rear ends inside the bottom box. A number of nozzles are evenly arranged and are respectively installed at the front and rear ends of the inner wall of the bottom box.

[0010] Further, a number of the nozzles are communicated with the inside of the adjacent annular cavity. The nozzles face the inside of the slot. Two branch pipes are provided and are respectively connected to the upper ends of the two connecting pipes. The branch pipes are communicated with the inside of the adjacent annular cavity. The air pump is signal-connected to the PLC controller.

[0011] Further, the sliding assembly includes balls and sliders. A rubber pad is attached to the inner wall of the slot. A number of balls are respectively installed at the bottoms of the two chutes. Two sliders are provided and are respectively connected to the left and right ends of the valve core. The sliders are in contact with the adjacent balls.

[0012] Compared with the prior art, the advantages of the present utility model are as follows:

[0013] When the jetting assembly works, first, the outlet pipe of the hose is communicated with the two branch pipes. Then, the outlet pipe can be successively communicated with the annular cavity and the inside of the nozzles through the branch pipes. The PLC controller is signal-connected to the structure for controlling the operation of the electric push rod. The structure for controlling the operation of the electric push rod can be the central control system of the pulverized coal injection equipment or a button. When the electric push rod drives the valve core to move downward, a signal is transmitted to the PLC controller. The PLC controller can then control the air pump to inhale external air through the intake pipe. A filter screen for filtering impurities in the external air can be arranged inside the intake pipe. After the air pump inhales the air, it can successively pump the external air into the nozzles through the outlet pipe, the branch pipes, and the annular cavity. The gas can then be ejected through a number of nozzles. The ejected air can blow out impurities such as pulverized coal inside the slot, preventing the accumulation of pulverized coal at the slot and the valve core, which may affect the normal entry and exit of the valve core, thus ensuring the sealing and normal operation of the plug valve for the pulverized coal injection equipment.

[0014] When the electric push rod drives the valve core to move upward, a signal is transmitted to the PLC controller. The PLC controller can then control the air pump to suspend inhaling external air, ensuring the normal injection of pulverized coal in the pulverized coal injection equipment. According to the above steps, the jet cleaning of the slot and the valve core can be automatically completed, which is relatively convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall front sectional structure of the present utility model;

[0016] Figure 2 Schematic diagram of the overall left - view sectional structure of the present utility model;

[0017] Figure 3 For the present utility model Figure 1 Schematic diagram of the enlarged structure of part A;

[0018] Figure 4 For the present utility model Figure 2 Schematic diagram of the enlarged structure of part B.

[0019] Markings in the figure: bottom box 101, electric push rod 102, air pump 103, intake pipe 104, exhaust pipe 105, PLC controller 106, valve core 107, chute 108, slot 109, rubber pad 110, mounting bracket 111, connecting pipe 112, annular cavity 113, spray head 114, branch pipe 115, ball 116, slider 117. Specific embodiments

[0020] As Figures 1 to 4 shown, the present application is a flap valve for a pulverized coal injection device, including a bottom box 101. An upper end of the outside of the bottom box 101 is connected with a mounting bracket 111, and a valve core 107 is arranged inside the mounting bracket 111;

[0021] Chutes 108 are respectively opened on the left and right inner walls of the mounting bracket 111. A slot 109 communicating with the lower ends of the chutes 108 is opened on the bottom surface of the inner wall of the bottom box 101. An air - jetting assembly is arranged inside the bottom box 101, and the air - jetting assembly is used for cleaning the inside of the slot 109;

[0022] A sliding assembly is arranged inside the chute 108, and the sliding assembly is used to assist the sliding of the valve core 107. The sliding assembly includes balls 116 and sliders 117. A rubber pad 110 is attached to the inner wall of the slot 109. A plurality of balls 116 are respectively installed at the bottoms of the two chutes 108. Two sliders 117 are respectively connected to the left and right ends of the valve core 107, and the sliders 117 are in contact with the adjacent balls 116;

[0023] An electric push rod 102 is installed above the mounting bracket 111. A power output end of the electric push rod 102 is inserted into the inside of the mounting bracket 111 and connected to the upper end of the valve core 107. Connecting pipes 112 are communicated with the front and rear ends of the bottom box 101;

[0024] When the gate valve for the pulverized coal injection equipment is in use, since the front and rear ends of the bottom box 101 are connected with the connecting pipes 112, the user can respectively connect with the pulverized coal injection equipment and the pulverized coal combustion equipment through the connecting pipes 112 at the front and rear ends of the bottom box 101. When the user needs to close the gate valve to isolate the pulverized coal injection equipment and the pulverized coal combustion equipment, since the power output end of the electric push rod 102 is inserted into the mounting frame 111 and connected to the upper end of the valve core 107, the electric push rod 102 can drive the valve core 107 to move downward. At this time, the sliders 117 at the left and right ends of the valve core 107 can move downward with the valve core 107. At this time, the ball 116 in contact with the slider 117 can roll, thereby lifting the slider 1 17 and the smoothness of the downward movement of the valve core 107, and the ball bearings 116 on the left and right sides can also limit the downward movement direction of the valve core 107 to avoid the valve core 107 from deflecting when moving downward, and better assist the sliding of the valve core 107. After the valve core 107 slides downward, it can be inserted into the slot 109. At this time, the rubber pad 110 fitted to the inner wall of the slot 109 can be squeezed, and the rubber pad 110 can ensure the sealing between the valve core 107 and the slot 109. At this time, the gate valve can be closed, thereby achieving the effect of isolating the coal powder injection equipment and the coal powder combustion equipment. When the user does not need to inject coal powder into the coal powder combustion equipment temporarily, the gate valve can be used to block the transportation of coal powder;

[0025] When the user needs to use the pulverized coal injection device to inject pulverized coal into the pulverized coal combustion device, the electric push rod 102 drives the valve core 107 to move upward, and the valve core 107 can be separated from the slot 109. At this time, the inside of the bottom box 101 is in a connected state, and the pulverized coal injection device can inject pulverized coal into the pulverized coal combustion device.

[0026] The jet assembly includes a nozzle 114 and a branch pipe 115. The upper left and right ends of the mounting frame 111 are respectively equipped with an air pump 103 and a PLC controller 106;

[0027] The air pump 103 is connected to an air inlet pipe 104 and an air outlet pipe 105 on the upper side and on the left side respectively. The bottom box 101 has an annular cavity 113 at both the front and rear ends. The nozzles 114 are evenly arranged and respectively installed at the front and rear ends of the inner wall of the bottom box 101.

[0028] The plurality of nozzles 114 are connected to the inner part of the adjacent annular cavity 113, and the nozzles 114 face the inner part of the slot 109. Two branch pipes 115 are provided and are respectively connected to the upper ends of the two connecting pipes 112. The branch pipes 115 are connected to the inner part of the adjacent annular cavity 113, and the air pump 103 is connected to the PLC controller 106 by signal.

[0029] When the jetting assembly is working, since an air pump 103 and a PLC controller 106 are respectively installed at the left and right ends above the mounting frame 111, an intake pipe 104 and an outlet pipe 105 are respectively communicated above and on the left side of the air pump 103. First, the outlet pipe 105 of the hose is communicated with two branch pipes 115, and the outlet pipe 105 can then be successively communicated with the annular cavity 113 and the inside of the nozzle 114 through the branch pipes 115, facilitating subsequent work;

[0030] After the user connects the outlet pipe 105 and the two branch pipes 115, the PLC controller 106 is signal-connected to the structure that controls the operation of the electric push rod 102. The structure that controls the operation of the electric push rod 102 can be the central control system of the pulverized coal injection equipment or a button. When the electric push rod 102 drives the valve core 107 to move downward, a signal is transmitted to the PLC controller 106, and the PLC controller 106 can then control the air pump 103 to inhale external air through the intake pipe 104. A filter screen for filtering impurities in the external air can be arranged inside the intake pipe 104. After the air pump 103 inhales the air, it can successively pump the external air into the inside of the nozzle 114 through the outlet pipe 105, the branch pipes 115, and the annular cavity 113. Since the nozzle 114 is provided with a number of evenly distributed nozzles that are respectively installed at the front and rear ends of the inner wall of the bottom box 101, and the nozzle 114 faces the inside of the slot 109, the gas can be ejected through the number of nozzles 114, and the ejected air can blow out impurities such as pulverized coal inside the slot 109, preventing the accumulation of pulverized coal at the slot 109 and the valve core 107 from affecting the normal entry and exit of the valve core 107, thereby ensuring the sealing and normal operation of the plug valve for the pulverized coal injection equipment;

[0031] When the electric push rod 102 drives the valve core 107 to move upward, a signal is transmitted to the PLC controller 106, and the PLC controller 106 can then control the air pump 103 to pause inhaling external air, ensuring the normal injection of pulverized coal in the pulverized coal injection equipment. According to the above steps, the jet cleaning of the slot 109 and the valve core 107 can be automatically completed, which is relatively convenient.

Claims

1. A gate valve for coal powder injection equipment, comprising a bottom box (101), the upper end of the bottom box (101) being connected to a mounting frame (111), the mounting frame (111) being provided with a valve core (107), characterized in that: The left and right sides of the inner wall of the mounting frame (111) are both provided with slide grooves (108); the bottom surface of the inner wall of the bottom box (101) is provided with a slot (109) connected to the lower end of the slide groove (108); an air jet component is provided inside the bottom box (101), and the air jet component is used to clean the inside of the slot (109); A sliding assembly is provided inside the slide groove (108), and the sliding assembly is used to assist the valve core (107) in sliding; The jet assembly comprises a nozzle (114) and a branch pipe (115); the front and rear ends of the bottom box (101) are both connected with connecting pipes (112); and the upper left and right ends of the mounting frame (111) are respectively equipped with an air pump (103) and a PLC controller (106); The air pump (103) is connected to an air inlet pipe (104) and an air outlet pipe (105) above and on the left side thereof, respectively. The bottom box (101) is provided with an annular cavity (113) at the front and rear ends thereof. The nozzles (114) are provided in a uniform pattern and are respectively installed at the front and rear ends of the inner wall of the bottom box (101).

2. The gate valve for coal powder injection equipment according to claim 1, characterized in that: An electric push rod (102) is installed above the mounting frame (111), and a power output end of the electric push rod (102) is inserted into the mounting frame (111) and connected to the upper end of the valve core (107).

3. The gate valve for coal powder injection equipment according to claim 1, characterized in that: A plurality of the nozzles (114) are connected to the interior of the adjacent annular cavity (113), the nozzles (114) face the interior of the slot (109), two branch pipes (115) are provided and are respectively connected to the upper ends of the two connecting pipes (112), the branch pipes (115) are connected to the interior of the adjacent annular cavity (113), and the air pump (103) is connected to the PLC controller (106) by signal.

4. The gate valve for coal powder injection equipment according to claim 1, characterized in that: The sliding assembly includes a ball (116) and a slider (117); the inner wall of the slot (109) is fitted with a rubber pad (110); a plurality of ball (116) are provided and are respectively installed at the bottom of the two slide grooves (108); two sliders (117) are provided and are respectively connected to the left and right ends of the valve core (107); and the slider (117) is in contact with the adjacent ball (116).

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