Switching valve of oxidation device

Abstract

The oxidation device switching valve comprises an air inlet side shell and an air outlet side shell, the air inlet side shell and the air outlet side shell respectively comprise an air outlet cavity, a valve rod cavity and an air inlet cavity from top to bottom, and two sets of valve ports are oppositely formed in the lower ends of the air outlet cavities and the upper ends of the air inlet cavities. The air inlet side shell and the air outlet side shell are each internally provided with two valve rod assemblies, each valve rod assembly is provided with two fixing plates capable of covering valve ports, and sealing strips capable of making sealing contact with the valve ports in the lower side of the air outlet cavity are arranged above the fixing plates on the upper sides of the valve rod assemblies. A sealing strip which can be in sealing contact with a valve port in the upper side of the air inlet cavity is arranged below the fixing plate on the lower side of the valve rod assembly; by arranging the sealing strip on the fixing plate, when the valve rod assembly moves upwards to enable the upper fixing plate to close the upper valve port, or when the valve rod assembly moves downwards to enable the upper fixing plate to close the lower valve port, the closing and sealing effect of the valve port can be improved, and gas leakage during gas switching is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of oxidation device, especially, relate to an oxidation device switching valve. BACKGROUND

[0002] The gas oxidation device can utilize coal mine extracted gas and air exhaust gas, oxidize the gas that cannot be ignited and extract heat for comprehensive utilization, and the switching valve is indispensable for the system as a device for switching the gas inlet direction of the gas oxidation device. During the normal working process of the gas oxidation device, the switching valve periodically switches the gas inlet and exhaust directions of the oxidation device. The gas inlet temperature of the gas oxidation device is normal temperature, and the exhaust temperature is generally 60-100 DEG C. The general switching period is 60-120s.

[0003] For the oxidation device switching valve, through retrieval in the prior art, the utility model discloses a kind of oxidation device switching valves with waste heat recovery function, which mainly includes airflow switching component, waste heat recovery component and the like, and detailed content and use principle can be referred to patent content. The oxidation device switching valve similar to the prior art in the prior art is found to have room for improvement in actual implementation process: when the fixed plate on the valve stem assembly covers the valve port to switch the airflow direction, because the fixed plate does not fit tightly with the valve port, it is easy to cause smoke leakage. UTILITY MODEL CONTENT

[0004] In view of the deficiencies and shortcomings in the prior art, the utility model aims to provide an oxidation device switching valve, which solves the problem of smoke leakage caused by the fixed plate on the valve stem assembly covering the valve port to switch the airflow direction in the prior art.

[0005] To solve the above technical problems, the utility model adopts the following technical scheme: an oxidation device switching valve, comprising an inlet side shell and an exhaust side shell, the inlet side shell and the exhaust side shell each comprise an exhaust cavity, a valve stem cavity and an inlet cavity from top to bottom, two groups of valve ports are arranged opposite to the lower end of the exhaust cavity and the upper end of the inlet cavity, two groups of valve stem assemblies are arranged in the inlet side shell and the exhaust side shell, two fixed plates capable of covering the valve ports are arranged on the valve stem assemblies, a sealing strip capable of sealingly contacting the valve port on the lower side of the exhaust cavity is arranged above the fixed plate on the upper side of the valve stem assembly, a sealing strip capable of sealingly contacting the valve port on the upper side of the inlet cavity is arranged below the fixed plate on the lower side of the valve stem assembly, the upper ends of the two valve stem assemblies in the inlet side shell and the two valve stem assemblies in the exhaust side shell are connected by a connecting rod, the upper end of each connecting rod is connected to a gas cylinder, the gas cylinder is fixed on the inlet side shell and the exhaust side shell by a support, a protective cover capable of covering the gas cylinder and the connecting rod is arranged on the outer side of the support, and a heat dissipation hole is arranged on the protective cover.

[0006] As a further improvement of the utility model, the protective cover is made of transparent material.

[0007] As a further improvement of the utility model, the protective cover is provided with an openable maintenance door.

[0008] As a further improvement of the utility model, the sealing strip is made of high-temperature-resistant material.

[0009] As a further improvement of the utility model, the sealing strip is made of silicone rubber.

[0010] Compared with the prior art, the utility model has the following advantages:

[0011] 1. By arranging the sealing strip on the fixed plate, when the valve rod assembly moves upward and the upper fixed plate closes the upper valve port, or when the valve rod assembly moves downward and the upper fixed plate closes the lower valve port, the closing sealing effect of the valve port can be improved, and gas leakage during gas switching can be reduced.

[0012] In addition, the upper ends of the two valve rod assemblies in the air inlet side shell and the two valve rod assemblies in the air outlet side shell are connected by a connecting rod, and the middle upper end of each connecting rod is connected with a cylinder, so that the two valve rod assemblies on the same side are driven by one cylinder, the synchronization effect of the two assemblies on the same side is improved, the control program is simplified, and maintenance and maintenance are facilitated. In addition, by arranging the protective cover, the problem of easy dust contamination caused by exposure to air when the oil cylinder and the valve rod assembly are stretched back and forth is avoided.

[0013] And the heat generated by the cylinder and the valve rod assembly can be dissipated by arranging the heat dissipation holes on the protective cover, so as to avoid the influence of high heat in the protective cover on the service life of the cylinder.

[0014] 2. By making the protective cover of transparent material, the situation in the protective cover can be observed conveniently, and by arranging the maintenance door on the protective cover, maintenance is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0015] The utility model will be further described below in combination with the drawings:

[0016] Figure 1 It is the structural schematic diagram of the utility model;

[0017] Figure 2 It is the structural schematic diagram of the protective cover and the cylinder;

[0018] Figure 3 It is the structural schematic diagram of the fixed plate and the sealing strip;

[0019] In the figure: 1, the air inlet side shell; 2, the exhaust side shell; 3, the exhaust cavity; 4, the valve rod cavity; 5, the air inlet cavity; 6, the air inlet; 7, the valve port; 8, the exhaust port; 9, the fixed plate; 10, the sealing strip; 11, the connecting rod; 12, the cylinder; 13, the protective cover; 14, the heat dissipation hole; 15, the support; 16, the valve rod assembly; 17, the maintenance door. DETAILED DESCRIPTION

[0020] The following will be described in detail with reference to the accompanying drawings. Figures 1-3 The utility model will be further described in detail. For more clearly, only the structure related to the utility model point is shown in the figure.

[0021] In order to facilitate the description, now define the coordinate system as shown in Figure 1 And with the left and right direction as horizontal, the front and back direction as vertical, the up and down direction as vertical.

[0022] The utility model discloses an oxidation device switching valve. Refer to Figure 1 An oxidation device switching valve, including air inlet side shell 1 and exhaust side shell 2, the air inlet side shell and exhaust side shell 2 all include exhaust cavity 3, valve rod cavity 4 and air inlet cavity 5 from top to bottom, the air inlet cavity 5 one end is air inlet 6, the lower end of exhaust cavity 3 and the upper end of air inlet cavity 5 are oppositely provided with two groups of valve ports 7, the exhaust cavity 3 of air inlet side shell 1 and exhaust side shell 2 is communicated, and the middle part is provided with exhaust port 8, the air inlet cavity 5 of air inlet side shell 1 and exhaust side shell 2 is connected through connecting assembly, the air inlet side shell 1 and exhaust side shell 2 all are equipped with two groups of valve rod assemblies 16, the valve rod assembly 16 all is equipped with two fixed plates 9 that can cover valve port 7, the structure and connection relationship of each component of oxidation device switching valve above and the implementation principle of oxidation device switching valve are same with prior art, and specifically can refer to the patent of CN211423456U.

[0023] In the embodiment, as shown in Figure 2 And Figure 3 The upper side of the fixed plate 9 of the valve rod assembly 16 is provided with a sealing strip 10 that can be in sealing contact with the valve port 7 on the lower side of the exhaust cavity 3, and the lower side of the fixed plate 9 of the valve rod assembly 16 is provided with a sealing strip 10 that can be in sealing contact with the valve port 7 on the upper side of the air inlet cavity 5. By providing a sealing strip 10 on the fixed plate 9, when the valve rod assembly 16 moves upward and the upper side fixed plate 9 closes the upper side valve port 7, or when the valve rod assembly 16 moves downward and the upper side fixed plate 9 closes the lower side valve port 7, the closing sealing effect of the valve port 7 can be improved, and gas leakage during gas switching can be reduced. In addition, the sealing strip 10 is made of high-temperature-resistant material, and the sealing strip 10 is made of silicone rubber.

[0024] In addition, in the embodiment, upper ends of the two valve rod assemblies 16 in the intake side shell 1 and the two valve rod assemblies 16 in the exhaust side shell 2 are connected by a connecting rod 11, upper ends of the connecting rod 11 are connected with a cylinder 12, the cylinder 12 is fixed on the intake side shell 1 and the exhaust side shell 2 by a support 15, the support 15 is provided with a protective cover 13 capable of covering the cylinder 12 and the connecting rod 11, the protective cover 13 is made of transparent material, which is convenient for observing the situation in the protective cover 13, and a maintenance door 17 is arranged on the protective cover 13, which is convenient for maintenance. The anti-skid cover is provided with a heat dissipation hole 14, and the heat dissipation hole 14 is arranged on the protective cover 13, which can dissipate the heat brought out by the cylinder 12 and the valve rod assembly 16, so as to avoid the influence of high heat in the protective cover 13 on the service life of the cylinder 12. Therefore, through the above arrangement, the two valve rod assemblies 16 on the same side are driven by a cylinder 12, the synchronization effect of the two assemblies on the same side is improved, the control program is simplified, and maintenance and maintenance are facilitated. In addition, by arranging the protective cover 13, the problem of easy dust adhesion caused by exposure to air when the oil cylinder and the valve rod assembly 16 are stretched back and forth is avoided. In addition, the protective cover 13 is provided with an open maintenance door 17, which is convenient for maintenance.

[0025] In the description of the present application, it should be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an 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 present application can be understood according to the specific circumstances. It should be understood that the specific embodiments described herein are only used to understand the present application, and are not used to limit the present application, and all other embodiments obtained by ordinary skilled in the art without creative labor are within the scope of protection of the present application.

Claims

1. An oxidation device switching valve comprising an intake side housing and an exhaust side housing, each of the intake side housing and the exhaust side housing comprising from top to bottom an exhaust cavity, a valve stem cavity and an intake cavity, the lower end of the exhaust cavity and the upper end of the intake cavity being oppositely provided with two sets of valve ports, each of the intake side housing and the exhaust side housing being provided with two sets of valve stem assemblies, each of the valve stem assemblies being provided with two fixed plates capable of covering the valve ports, characterized in that: The upper side of the valve rod assembly is provided with a sealing strip capable of sealingly contacting the valve port on the lower side of the exhaust cavity, the lower side of the valve rod assembly is provided with a sealing strip capable of sealingly contacting the valve port on the upper side of the intake cavity, the upper ends of the two valve rod assemblies in the intake side shell and the two valve rod assemblies in the exhaust side shell are connected by a connecting rod, the middle and upper ends of each connecting rod are connected with a cylinder, the cylinder is fixed on the intake side shell and the exhaust side shell by a support, the outer side of the support is provided with a protective cover capable of covering the cylinder and the connecting rod, and the anti-skid cover is provided with heat dissipation holes.

2. An oxidation device switching valve according to claim 1, characterized in that: The protective cover is made of transparent material.

3. An oxidizer switching valve according to claim 1, wherein: The protective cover is provided with an openable maintenance door.

4. An oxidizer switching valve according to claim 1, wherein: The sealing strip is made of high-temperature resistant material.

5. An oxidation device switching valve according to claim 4, characterized in that: The sealing strip is made of silicone rubber.

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