Bag-type dust collector bypass valve capable of realizing self-cleaning

Abstract

The utility model discloses a bag-type dust collector bypass valve capable of realizing self-cleaning, which comprises a gas purification chamber and a flue gas chamber, the flue gas chamber is provided with a side port for communicating the gas purification chamber and the flue gas chamber, a cylinder is fixed outside the gas purification chamber, a telescopic rod of the cylinder is connected with a bypass valve rod extending into the gas purification chamber, and the bypass valve rod is connected with a bypass valve. A bypass valve plate for opening and closing the side opening is arranged at the end of the bypass valve rod, the bypass valve rod is sleeved with a protective cylinder, one end of the protective cylinder is connected with the air purification chamber, the other end of the protective cylinder allows the bypass valve rod to extend out, an annular scraper arranged on the bypass valve rod in a sleeving mode is arranged between the protective cylinder and the bypass valve rod, and the annular scraper axially moves relative to the bypass valve rod. The inner wall of the annular scraper is tightly attached to the outer wall of the bypass valve rod, and the annular scraper is connected with the protective cylinder through a support. The periphery of the valve rod of the bypass valve is surrounded by the self-cleaning device, the structure is simple and reliable, the overall function is complete, and practicability is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical equipment technical field, more specifically, it relates to a cloth bag dust collector bypass valve of realizing self cleaning. BACKGROUND

[0002] In the operation process of cloth bag dust collector, bypass valve is in the normally closed state, and the bypass valve rod is exposed in the flue gas for a long time. Because the temperature of high-temperature flue gas will decrease in the dust removal process, resulting in the crystallization of compounds, which is attached to the bypass valve rod, and the valve rod will be stuck after a long time, so that the bypass valve cannot be opened. At this time, the device needs to be shut down, and the maintenance personnel needs to enter the cloth bag dust collector to clean the attached crystals. When the bypass valve cannot be opened in time, not only the safe operation is affected, but also the operation cost is increased. UTILITY MODEL CONTENTS

[0003] The utility model discloses a kind of cloth bag dust collector bypass valves of realizing self cleaning, the valve rod periphery of the bypass valve is surrounded using self cleaning device, and the structure is simple and reliable. The device realizes self cleaning from three aspects of reducing crystallization, making crystallization difficult to attach and removing crystallization, and the device is strong in pertinence, high in automation, simple in operation, strong in scientific nature, and can well solve the crystallization problem of bypass valve rod of cloth bag dust collector.

[0004] To solve the above technical problems, the utility model aims at realizing as follows: a kind of cloth bag dust collector bypass valve of realizing self cleaning is involved in the utility model, including clean gas chamber and flue gas chamber, the side opening of making both communication is opened on the flue gas chamber, the gas cylinder is fixed outside the clean gas chamber, the telescopic rod of gas cylinder is connected with the bypass valve rod that is inserted into the clean gas chamber, the end of bypass valve rod is equipped with the bypass valve plate that opens and closes the side opening, the bypass valve rod is sheathed with protective cylinder, one end of protective cylinder is connected with the clean gas chamber, the other end is for bypass valve rod to extend, annular scraper is arranged between protective cylinder and bypass valve rod and is sheathed on bypass valve rod, annular scraper moves axially relative to bypass valve rod, the inner wall of annular scraper is tightly attached to the outer wall of bypass valve rod, and annular scraper and protective cylinder are connected through support.

[0005] The utility model is further provided with that: one end of protective cylinder is closed by clean gas chamber, and the other end has necking.

[0006] The utility model is further provided with that: the cavity is formed in protective cylinder, and further include high-pressure air pipe, one end of which is connected with the cavity, and compressed air is sent in high-pressure air pipe.

[0007] The utility model is further provided with that: the connection between high-pressure air pipe and cavity is arranged away from necking.

[0008] The utility model further sets up: the electric heating wire of giving heating is wound on the protection cylinder.

[0009] The utility model further sets up: the protection cylinder includes outer cylinder and inner cylinder, the electric heating wire is arranged between outer cylinder and inner cylinder.

[0010] The utility model further sets up: the protection cylinder is stainless steel material.

[0011] The utility model further sets up: the annular scraper has diamond cutter head.

[0012] Summarized above, the utility model has following beneficial effect:

[0013] 1. the bypass valve increases a complete set of self-cleaning crystallization system on the basis of original bypass valve, simple and reliable structure, scientific convenience, strong pertinence, can reduce the crystallization production on bypass valve rod and carry out automatic cleaning well, the problem of crystallization adhering to bypass valve rod and being stuck and unable to open the valve is solved well.

[0014] 2. the bypass valve adopts pneumatic quick-opening gland form, and the drive connecting rod is simple and reliable straight line movement, and when the bypass valve rod is improved to the highest position after the bypass valve is opened, the bypass valve reaches just below the metal shell.

[0015] 3. the compressed air layer in the metal shell and the scraper main part all adopt stainless steel material, are resistant to high temperature, corrosion resistant, and the diamond drill bit of the scraper head can better scrape off the crystallization.

[0016] 4. the electric heating wire in the metal shell can be matched with thermocouple and temperature controller to realize the consistency of flue gas and metal shell temperature and heat compressed air, reduce the production of crystallization. DRAWINGS

[0017] Figure 1 It is the whole structure schematic diagram of the utility model. CONCRETE IMPLEMENTING METHOD

[0018] In order to make the technical personnel in the field better understand the technical scheme of the utility model, the preferred implementation scheme of the utility model is described below in combination with specific implementation examples, but it should be understood that these descriptions are only for further illustrating the features and advantages of the utility model, and are not the limitation of the utility model patent claim. Based on the embodiment in the utility model, all other embodiments obtained by the ordinary skill in the art without making creative labor belong to the scope of protection of the utility model.

[0019] The utility model is further illustrated below in combination with the drawings and preferred examples.

[0020] Embodiment 1

[0021] Referring to Figure 1 As shown in the drawings, the bypass valve of the bag-type dust collector capable of self-cleaning in the embodiment comprises a clean gas chamber 100 and a flue gas chamber 200, and a side opening 1 is formed on the flue gas chamber 200 to communicate the two chambers. A gas cylinder 2 is fixed outside the clean gas chamber 100, and a bypass valve rod 3 is connected to the telescopic rod of the gas cylinder 2 and extends into the clean gas chamber. An end of the bypass valve rod 3 is provided with a bypass valve plate 4 to open and close the side opening 1. A protective cylinder 5 is sleeved on the bypass valve rod 3, and one end of the protective cylinder 5 is connected to the clean gas chamber and the other end is used for the bypass valve rod to extend out. An annular scraper 6 is arranged between the protective cylinder 5 and the bypass valve rod 4 and is sleeved on the bypass valve rod 4. The annular scraper 6 moves axially relative to the bypass valve rod 4. The inner wall of the annular scraper 6 is tightly attached to the outer wall of the bypass valve rod 4. The annular scraper 6 is connected to the protective cylinder 5 through a support (not shown).

[0022] Further, one end of the protective cylinder 5 is closed by the clean gas chamber, and the other end has a necked portion 51.

[0023] Further, the protective cylinder 5 is made of stainless steel.

[0024] Further, the annular scraper 6 is made of stainless steel.

[0025] Further, the annular scraper 6 has a diamond cutter head.

[0026] In the embodiment, when the telescopic rod on the gas cylinder 2 performs telescopic action, the bypass valve rod 3 moves axially relative to the annular scraper 6, so that the annular scraper 6 scrapes the outer wall of the bypass valve rod 3 to achieve the effect of cleaning the crystals attached to the wall.

[0027] In the embodiment, the annular scraper body is made of stainless steel, and a diamond is additionally arranged at the cutter head to enhance the strength and corrosion resistance of the annular scraper.

[0028] In the embodiment, the unsealed end of the protective cylinder 5 is arranged in a necked structure to reduce the return of external flue gas into the cylinder.

[0029] Embodiment 2

[0030] Referring to Figure 1 As shown in the drawings, the bypass valve of the bag-type dust collector capable of self-cleaning in the embodiment is further provided with a cavity 52 formed in the protective cylinder 5 on the basis of embodiment 1, and a high-pressure air pipe 53 connected to one end of the cavity 52 is arranged to supply compressed air in the high-pressure air pipe 53.

[0031] Further, the connection between the high-pressure air pipe 53 and the cavity 52 is arranged away from the necked portion 51. Further, the connection between the high-pressure air pipe 53 and the cavity 52 is arranged away from the necked portion 51.

[0032] In the present embodiment, by injecting compressed air into the cavity 52 formed in the protective cylinder 5, the inner wall of the protective cylinder 5, the outer wall of the bypass valve stem 3 and the annular scraper 6 can be continuously purged, so that an escaping air flow is formed in the cavity, which surrounds the entire bypass valve stem. By continuously blowing compressed air from the outside, the crystals that may be attached to the bypass valve stem and the scraper can be continuously impacted by the air flow.

[0033] In the present embodiment, the protective cylinder 5 is made of stainless steel, and the diameter of the compressed air outlet (i.e. the position of the neck 51) is reduced to increase the gas flow rate, which is beneficial to increase the impact force on the adsorbed crystals, thereby realizing self-cleaning of the crystals on the bypass valve stem in cooperation with the scraper.

[0034] Example 3

[0035] Referring to Figure 1 In the present embodiment, the bypass valve of the bag-type dust collector can realize self-cleaning, which is further provided with the heating electric heating wire 54 wound on the protective cylinder 5 based on examples 1 and 2.

[0036] Further, the protective cylinder 5 includes an outer cylinder and an inner cylinder, and the electric heating wire 54 is arranged between the outer cylinder and the inner cylinder.

[0037] In the present embodiment, the outer layer of the compressed air pipe (i.e. the inner cylinder) is provided with a stainless steel metal shell (i.e. the outer cylinder), which is corrosion-resistant and has strong temperature resistance. The metal shell contains a thermocouple and an electric heating wire, and the temperature of the metal shell is measured, fed back and automatically adjusted by a temperature controller, so that the maximum temperature difference does not exceed 1°C, the temperature of the metal shell is consistent with the temperature of the flue gas, the energy loss of the flue gas when passing through the metal shell is reduced, and the temperature is kept as constant as possible, thereby reducing the possibility of crystal production on the metal shell, and also playing a role of heating compressed air.

[0038] The utility model relates to a cloth bag dust collector bypass valve that can realize self cleaning, the bypass valve adds a complete set of self cleaning crystallization system on the basis of the original bypass valve, and the structure is simple and reliable, scientific and convenient, and strong in pertinence, can reduce the crystallization production on the bypass valve rod and carry out automatic cleaning very well, and the problem that crystallization is attached to the bypass valve rod and cannot be opened is solved very well, the bypass valve adopts pneumatic quick -open gland form, and the drive connecting rod is simple and reliable linear motion, and when the bypass valve rod is improved to the highest position after the bypass valve is opened, the bypass valve is just reached below the metal shell.

[0039] In the utility model, if there are terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the actual shown orientation or positional relationship, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the orientation or positional relationship in the utility model are only used for example description, and cannot be understood as the limitation of the patent, for the ordinary skilled person in the art, can combine the embodiments, and understand the specific meaning of the above terms according to the specific situation.

[0040] Unless otherwise explicitly specified and limited, in the utility model, if there are terms "set", "connected" and "connected", should be understood in a broad sense, for example, can be fixedly connected, can be detachably connected, or integrally connected, can be directly connected, or indirectly connected through the intermediate medium, can be the communication inside two elements.For the ordinary skilled person in the art, the specific meaning of the above terms in the utility model can be understood according to the specific situation.

[0041] The above detailed the preferred embodiment of the utility model. It should be understood that the ordinary skilled person in the art can make many modifications and changes according to the concept of the utility model without creative labor. Therefore, any technical scheme that the skilled person in the art can obtain through logical analysis, reasoning or limited experiment on the basis of the prior art according to the concept of the utility model should be within the protection scope determined by the claims.

Claims

1. A self-cleaning bypass valve for a baghouse dust collector, comprising a clean air chamber and a flue gas chamber, wherein the flue gas chamber has a side opening for connecting the two, a cylinder is fixed outside the clean air chamber, a bypass valve rod extending into the clean air chamber is connected to the extension rod of the cylinder, and a bypass valve plate for opening and closing the side opening is provided at the end of the bypass valve rod, characterized in that: The bypass valve stem is covered by a protective sleeve. One end of the protective sleeve is connected to the clean air chamber, and the other end is for the bypass valve stem to extend out. An annular scraper is provided between the protective sleeve and the bypass valve stem, and the annular scraper moves axially relative to the bypass valve stem. The inner wall of the annular scraper is in close contact with the outer wall of the bypass valve stem. The annular scraper and the protective sleeve are connected by a bracket.

2. The self-cleaning bypass valve for a baghouse dust collector according to claim 1, characterized in that: One end of the protective cylinder is sealed by a clean air chamber, and the other end has a constricted opening.

3. The self-cleaning bypass valve for a baghouse dust collector according to claim 2, characterized in that: The protective cylinder forms a cavity and also includes a high-pressure air pipe with one end connected to the cavity, through which compressed air is supplied.

4. The self-cleaning bypass valve for a baghouse dust collector according to claim 3, characterized in that: The connection between the high-pressure air pipe and the cavity is located away from the constriction.

5. The self-cleaning bypass valve for a baghouse dust collector according to any one of claims 1-4, characterized in that: The protective cylinder is wrapped with a heating wire for heating.

6. The self-cleaning bypass valve for a baghouse dust collector according to claim 5, characterized in that: The protective cylinder includes an outer cylinder and an inner cylinder, and the heating wire is arranged between the outer cylinder and the inner cylinder.

7. The self-cleaning bypass valve for a baghouse dust collector according to claim 6, characterized in that: The protective cylinder is made of stainless steel.

8. The self-cleaning bypass valve for a baghouse dust collector according to claim 1, characterized in that: The annular scraper has a diamond tip.

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