Hollow shaft lift valve

Abstract

The utility model discloses a hollow shaft lift valve which comprises an air cylinder and a valve shaft, the air cylinder is connected with the valve shaft, the air cylinder and the valve shaft are concentrically installed, a valve plate is installed on the valve shaft, a valve seat is arranged on the side, away from the air cylinder, of the valve shaft, and a rear supporting wheel set is arranged on the valve seat. The valve plate is arranged at the end, away from the rear riding wheel set, of the outer side of the valve seat, the valve shaft is supported on the front riding wheel set and the rear riding wheel set, the front riding wheel set and the rear riding wheel set are installed in the RTO, the valve shaft is of a hollow shaft structure, and a valve shaft protection sleeve is arranged between the front riding wheel set and the rear riding wheel set. The valve shaft protection sleeve is designed to be of a round or square or telescopic structure.

Description

TECHNICAL FIELD

[0001] The utility model belongs to waste gas treatment technical field, and specifically relates to a hollow shaft poppet valve. BACKGROUND

[0002] Volatile organic compounds (VOCs) are the key precursors of fine particulate matters and ozone in urban atmosphere, mainly from petroleum and petrochemical industry, fine chemical industry, surface coating, packaging and printing industry, and most of the organic waste gas causes certain harm to atmospheric environment and human health. Industrial emission of organic waste gas is one of the main pollution sources in city. Regenerative combustion device (RTO) is a device that industrial organic waste gas is purified by combustion, and the exhaust gas after purification is heat-exchanged and cooled by regenerator, and then the waste gas to be treated is heat-exchanged and heated, and the core component of RTO is a poppet valve, and the sealing performance and stability of the poppet valve are required to be high. Since the poppet valve works in a high-temperature corrosive environment for a long time and frequently moves, the valve shaft support and other components are prone to failure, causing the RTO system to stop and affecting the normal operation of the device.

[0003] In view of the above factors, a hollow shaft poppet valve is provided, which has a cooling function, protects the valve shaft support component, adopts a multiple sealing structure, reduces the leakage of the poppet valve, improves the purification efficiency of RTO, and ensures the stable and standard operation of the RTO system. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a hollow shaft poppet valve to solve the problems in the background art.

[0005] The utility model aims at providing a hollow shaft poppet valve to solve the problems in the background art.

[0006] The valve shaft adopts a hollow shaft structure, and a valve shaft protection sleeve is arranged between the front and rear supporting wheel groups.

[0007] Further, the valve shaft protection sleeve is designed in a circular, square or telescopic structure.

[0008] Further, the valve shaft is provided with a distributor, and a plurality of hollow shaft air holes are formed in the valve shaft.

[0009] Further, the distributor adopts a conical structure or an elliptical head structure, and a plurality of air seal grooves are uniformly arranged around the distributor.

[0010] Further, the valve shaft adopts a hollow shaft structure, compressed air enters the inside of the valve shaft through the hollow shaft air hole, and then enters the distributor to uniformly arrange the compressed air in the sealing surface of the valve plate and the valve seat to form the valve plate air seal.

[0011] Further, the distributor is conical, and the distributor and the valve plate form a compressed air buffer space.

[0012] The several air seal grooves uniformly distributed on the distributor and the valve plate form a compressed air passage to uniformly distribute the compressed air in the circumferential direction.

[0013] Further, the valve shaft protection sleeve is filled with compressed air, and the pressure in the valve shaft protection sleeve is greater than the exhaust gas pressure outside the valve shaft protection sleeve, so that an air seal is formed.

[0014] Further, the compressed air enters the valve shaft protection sleeve through the outer compressed air interface arranged on the front shaft supporting wheel set and the inner compressed air interface arranged on the valve shaft protection sleeve, and the outer compressed air interface and the inner compressed air interface are connected through an air pipe.

[0015] Compared with the prior art, the utility model has the beneficial effects of:

[0016] The utility model has the cooling function, protects the valve shaft supporting part, adopts multiple sealing structures, reduces the lift valve leakage, improves the RTO purification efficiency, and guarantees the stable and up-to-standard operation of the RTO system.

[0017] The utility model discloses a valve shaft protection sleeve is arranged between the front shaft supporting wheel set and the rear shaft supporting wheel set, and the valve shaft protection sleeve is filled with compressed air, and because the pressure in the protection sleeve is greater than the exhaust gas pressure outside the protection sleeve, an air seal is formed, so that the exhaust gas is prevented from leaking from the valve shaft seal to the outside of the valve.

[0018] The utility model discloses that the valve shaft air seal and the valve plate air seal form double air seals, and the sealing performance of the valve is guaranteed.

[0019] The valve shaft protection sleeve protects the valve shaft and prevents the valve shaft from being corroded by the exhaust gas. The valve shaft protection sleeve protects the front shaft supporting wheel set and the rear shaft supporting wheel set, and prevents the supporting wheel set from being corroded by the exhaust gas.

[0020] The utility model discloses that compressed air enters the hollow shaft through the valve shaft protection sleeve, and then flows out through the distributor, so that the valve shaft, the valve plate and the supporting wheel set are cooled, and the adverse effects of the high-temperature environment in the RTO on the lift valve are reduced. ACCURACY

[0021] Figure 1 It is the structure schematic view of the utility model hollow shaft lift valve;

[0022] Figure 2 It is the valve shaft schematic view of the utility model;

[0023] Figure 3 The figure is a schematic diagram of the dispenser of the present application. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0025] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0026] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the present application.

[0027] As shown in Figures 1-3 A hollow shaft poppet valve, comprising a cylinder 1 and a valve shaft 2, the cylinder 1 is connected with the valve shaft 2, and the cylinder 1 is concentrically installed with the valve shaft 2, a valve plate 7 is installed on the valve shaft 2, a valve seat 6 is arranged away from the cylinder 1, a rear supporting wheel set 5 is arranged on the valve seat 6, the outer side of the valve seat 6 is provided with the valve plate 7 away from one end of the rear supporting wheel set 5, the valve shaft 2 is supported on the front supporting wheel set 3 and the rear supporting wheel set 5, and the front supporting wheel set 3 and the rear supporting wheel set 5 are installed in the RTO.

[0028] The valve shaft 2 adopts a hollow shaft structure, and a valve shaft protection sleeve 4 is arranged between the front supporting wheel set 3 and the rear supporting wheel set 5.

[0029] The preferred technical scheme of the present application is that the valve shaft protection sleeve 4 is designed in a circular, square or telescopic structure.

[0030] The preferred technical scheme of the present application is that the valve shaft 2 is provided with a distributor 21, and a plurality of hollow shaft air holes 22 are formed in the valve shaft 2.

[0031] The utility model discloses a preferred technical scheme, the distributor 21 adopts the conical structure or adopts the elliptical head structure, the distributor 21 periphery is equipped with the air seal groove 211 of uniform distribution.

[0032] The utility model discloses a preferred technical scheme, the valve shaft 2 adopts the hollow shaft structure, and the compressed air passes the hollow shaft air hole 22 and enters the valve shaft 2 inside, and then enters the distributor 21, and the compressed air is evenly arranged in the sealing surface of valve plate 7 and valve seat 6, and forms the valve plate air seal.

[0033] The utility model discloses a preferred technical scheme, the distributor 21 is conical, and the distributor 21 and valve plate 7 form compressed air buffer space;

[0034] The distributor 21 is equipped with the air seal groove 211 of uniform distribution and valve plate 7, and forms the compressed air passage, so that the compressed air is uniformly distributed along the circumferential direction.

[0035] The utility model discloses a preferred technical scheme, the valve shaft protection cover 4 is passed into the compressed air, and the pressure in the valve shaft protection cover 4 is greater than the exhaust pressure outside the valve shaft protection cover 4, and forms the air seal.

[0036] The utility model discloses a preferred technical scheme, and the compressed air passes the outer compressed air interface 8 set up on the front supporting wheel group 3 and the inner compressed air interface 10 set up on the valve shaft protection cover 4 and enters the valve shaft protection cover 4, and the outer compressed air interface 8 is connected through the gas pipe 9 between the inner compressed air interface 10.

[0037] The utility model discloses the valve shaft 2 adopts the hollow shaft structure, and compared with the solid shaft structure of traditional poppet valve, under the premise of guaranteeing the strength of shaft, the material consumption is greatly reduced, and the cost is saved.

[0038] The front supporting wheel group 3 and the rear supporting wheel group 5 are equipped with the valve shaft protection cover 4, and the valve shaft protection cover can be designed as circular, square, telescopic type and various forms.

[0039] The compressed air passes the outer compressed air interface 8, the gas pipe 9 and the inner compressed air interface 10 and enters the valve shaft protection cover 4.

[0040] The valve shaft 2 is equipped with the distributor 21, and the valve shaft is opened with several hollow shaft air holes 22.

[0041] The distributor 21 adopts the conical structure, and can also adopt the elliptical head structure, and the distributor periphery is equipped with the air seal groove 211 of uniform distribution.

[0042] Figure 1 The arrow direction in the figure is the compressed air flow direction.

[0043] A valve shaft protection sleeve 4 is arranged between the front shaft roller set 3 and the rear shaft roller set 5, and compressed air is introduced into the valve shaft protection sleeve 4, and since the pressure inside the valve shaft protection sleeve 4 is greater than the exhaust gas pressure outside the valve shaft protection sleeve 4, an air seal is formed to avoid exhaust gas leaking from the valve shaft seal to the outside of the valve.

[0044] Compressed air enters the hollow shaft through the valve shaft protection sleeve, and then flows out through the distributor, thereby cooling the valve shaft and the valve plate and reducing the adverse effects of the high-temperature environment in the RTO on the poppet valve.

[0045] The valve shaft 2 is in a hollow shaft structure, compressed air enters the valve shaft through the hollow shaft air hole 22, and then enters the distributor 21, thereby uniformly distributing the compressed air in the sealing surface of the valve plate 7 and the valve seat 6 to form a valve plate air seal and avoid exhaust gas leaking from the sealing surface of the valve plate 7. The distributor 21 is preferably designed to be conical, and the distributor 21 and the valve plate 7 form a compressed air buffer space. The distributor 21 is uniformly provided with a plurality of air seal grooves 211, and the air seal grooves 211 and the valve plate 7 form a compressed air passage to uniformly distribute the compressed air in the circumferential direction.

[0046] The valve shaft air seal and the valve plate air seal form a double air seal to ensure the sealing performance of the valve.

[0047] The valve shaft protection sleeve protects the valve shaft to avoid corrosion of the valve shaft by exhaust gas. The valve shaft protection sleeve protects the front shaft roller set and the rear shaft roller set to avoid corrosion of the roller sets by exhaust gas.

[0048] Compressed gas can cool the roller sets, the valve shaft and the valve plate.

[0049] The double air seal structure protects the roller sets from corrosion by exhaust gas, high-temperature flue gas and dust, reduces the wear of the valve shaft and the roller sets, improves the working environment of the valve plate and the valve seat, the valve shaft and the roller sets, and greatly improves the stability of the poppet valve and the purification efficiency of the RTO.

[0050] It is obvious to those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0051] Furthermore, it should be understood that although the specification is described in terms of embodiments, not every embodiment includes every feature or implementation described herein. The specification can include implicit combinations of explicitly mentioned features and / or implicit combinations of implicitly mentioned features. Such combinations are also expressly included within the scope of the specification and an embodiment.

Claims

1. A hollow spindle poppet valve characterized by: The utility model relates to a valve shaft protection sleeve (4) is arranged between the front supporting wheel group (3) and the rear supporting wheel group (5) of the valve shaft (2) with hollow shaft structure, and the valve shaft (2) is supported on the front supporting wheel group (3) and the rear supporting wheel group (5) of the valve shaft (2) with hollow shaft structure. The valve shaft (2) adopts hollow shaft structure, and the valve shaft protection sleeve (4) is arranged between the front supporting wheel group (3) and the rear supporting wheel group (5).

2. The hollow spindle poppet valve of claim 1, wherein: The valve shaft protection sleeve (4) is designed as a circular, square or telescopic structure.

3. The hollow spindle poppet valve of claim 2, wherein: The valve shaft (2) is provided with a distributor (21), and a plurality of hollow shaft air holes (22) are formed in the valve shaft (2).

4. The hollow spindle poppet valve of claim 3, wherein: The distributor (21) adopts a conical structure or an elliptical head structure, and is provided with uniformly distributed air seal grooves (211) around the periphery.

5. The hollow spindle poppet valve of claim 4, wherein: The valve shaft (2) adopts hollow shaft structure, and compressed air enters the inside of the valve shaft (2) through the hollow shaft air holes (22) and then enters the distributor (21), so that the compressed air is uniformly arranged in the sealing surface of the valve plate (7) and the valve seat (6) to form valve plate air seal.

6. The hollow spindle poppet valve of claim 5, wherein: The distributor (21) is conical, and the distributor (21) and the valve plate (7) form a compressed air buffer space. The distributor (21) is uniformly provided with a plurality of air seal grooves (211), and the valve plate (7) forms a compressed air passage, so that the compressed air is uniformly distributed along the circumferential direction.

7. The hollow spindle poppet valve of claim 6, wherein: Compressed air is introduced into the valve shaft protection sleeve (4), and the pressure inside the valve shaft protection sleeve (4) is greater than the exhaust gas pressure outside the valve shaft protection sleeve (4), so that an air seal is formed.

8. The hollow spindle poppet valve of claim 7, wherein: The compressed air enters the valve shaft protection sleeve (4) through the outer compressed air interface (8) arranged on the front supporting wheel group (3) and the inner compressed air interface (10) arranged on the valve shaft protection sleeve (4), and the outer compressed air interface (8) and the inner compressed air interface (10) are connected through an air pipe (9).

Images