A sealing device for the upper support shaft of a chain grate machine

Abstract

The invention discloses a chain grate upper support shaft sealing device in the technical field of chain grate machines. The device comprises an upper support shaft rotatably mounted on a chain grate machine housing, the end of the upper support shaft passes through the chain grate machine housing and is mounted on a frame, two sealing plugs arranged oppositely are sleeved on the outer periphery of the upper support shaft, one of the sealing plugs is mounted on the frame, and the other sealing plug is mounted on the outer side of the chain grate machine housing, a sealing gland is arranged between the two sealing plugs, a first sealing ring is arranged between the sealing plug and the sealing gland, the sealing gland comprises two arc-shaped pressure rings arranged oppositely, one end of the two pressure rings is hinged, the other end of the two pressure rings are provided with a locking plate, the locking plates of the two pressure rings are locked by an elastic clip, each locking plate is provided with an inner sealing gasket at a position close to the pressure ring, and each locking plate is provided with an outer sealing gasket at a position away from the pressure ring. The advantage of the invention is that the problem of air leakage at the shaft head of the upper support shaft is solved and the sealing performance is improved.

Description

Technical Field

[0001] The invention relates to the technical field of chain grates, and in particular to a sealing device for a supporting shaft on a chain grates. Background Art

[0002] The chain grate machine is a thermal equipment that works at high temperature. It evenly distributes the raw material balls on the slow-running grate bed, and uses the waste heat of the ring cooler and the hot air flow discharged from the rotary kiln to dry, preheat, oxidize and consolidate the raw balls. The grate bed of the chain grate machine is composed of a chain and a grate plate hoisted on the chain. The raw balls are transported by the grate plate laid on the chain. The chain is transmitted through a sprocket, which is set on the upper support shaft. The existing chain grate machine has a total of 78 upper support shafts. Since the upper support shaft is set to rotate, there is constant friction between the upper support shaft and the chain grate machine housing, which causes wear. The gap generated after wear becomes an air leakage point. There are a total of 156 air leakage points at the shaft head position of the upper support shaft of the existing chain grate machine, which causes cold air to continuously enter the chain grate machine housing, affecting the dry ball roasting. Summary of the invention

[0003] The purpose of the invention is to provide a sealing device for an upper supporting shaft of a chain grate machine, which can solve the problem of air leakage at the shaft head of the upper supporting shaft and improve the sealing performance.

[0004] In order to achieve the above-mentioned purpose of the invention, the upper support shaft sealing device of the chain grate machine of the present invention adopts the following technical scheme:

[0005] A sealing device for an upper support shaft of a chain grate machine comprises an upper support shaft rotatably mounted on a chain grate machine housing through a bearing, an end portion of the upper support shaft passes through the chain grate machine housing and is mounted on a frame, two sealing plugs arranged opposite to each other are sleeved on the outer periphery of the upper support shaft, a gap is left between the inner wall of the sealing plug and the outer wall of the upper support shaft, one of the sealing plugs is mounted on the frame, and the other sealing plug is mounted on the outer side surface of the chain grate machine housing, a sealing gland is provided between the two sealing plugs, the sealing gland can be detachably mounted on the outer periphery of the sealing plug, a first sealing ring is provided between the sealing plug and the sealing gland, the sealing gland comprises two arc-shaped pressure rings arranged opposite to each other, one end of the two pressure rings are hinged, and the other ends of the two pressure rings are provided with locking plates, the locking plates of the two pressure rings are locked by elastic clips, an inner sealing gasket is provided at a position of each locking plate close to the pressure ring, and an outer sealing gasket is provided at a position of each locking plate away from the pressure ring.

[0006] Preferably, the inner sealing gasket of one locking plate is set as a first inner step structure, and the inner sealing gasket of the other locking plate is set as a second inner step structure, and the first inner step structure and the second inner step structure cooperate with each other to press against each other, thereby improving the sealing effect.

[0007] Preferably, the outer sealing gasket of one locking plate is set as a first outer step structure, and the inner sealing gasket of the other locking plate is set as a second outer step structure, and the first outer step structure and the second outer step structure cooperate with each other to press against each other, thereby improving the sealing effect.

[0008] Preferably, the elastic clip includes a clamping portion for locking the two locking plates, and also includes a driving portion for driving the clamping portion to open and close.

[0009] Preferably, the clamping portion comprises two elastic plates, one end of the two elastic plates is provided with an opening for clamping the two locking plates, and the other end of the two elastic plates is provided with a connected fixing plate.

[0010] Preferably, the driving part comprises a driving rod arranged on the elastic plate, the length of the driving rod being greater than the length of the elastic plate. The elastic plate is deformed by the driving rod, thereby opening and closing the opening size, which is convenient for clamping the locking plate.

[0011] Preferably, the end of the locking plate away from the pressure ring is provided with an outer flange, and the inner wall of the elastic clip locking plate is provided with an inner flange pressing against the outer flange. The mutual pressing of the outer flange and the inner flange prevents the elastic frame from easily detaching from the detachment plate, and the clamping is stable.

[0012] Preferably, a second sealing ring is provided between one sealing plug and the frame, and a third sealing ring is provided between the other sealing plug and the chain grate housing. The second sealing ring is provided to improve the sealing performance of the installation between the sealing plug and the frame; the third sealing ring is provided to improve the sealing performance of the installation between the sealing plug and the chain grate housing.

[0013] Preferably, the upper support shaft and the frame are rotatably connected via a bearing.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The present invention seals the end of the upper support shaft by providing a sealing plug and a sealing gland to prevent external cold air from entering the chain grate machine housing; wherein the sealing gland is provided between the two sealing plugs, and the sealing performance between the sealing gland and the sealing plug is improved by providing a first sealing ring to prevent cold air from entering through the gap between the sealing gland and the sealing plug;

[0016] 2. The present invention sets the sealing gland as a quick-release structure, which is convenient for installation of the sealing gland. The sealing gland includes two hinged pressure rings, and the other end of the pressure ring is locked by an elastic clip. The sealing gland can be installed and removed only by the elastic clip, without other tools, and is convenient to use.

[0017] 3. The present invention realizes installation by arranging a locking plate at the locking end of the pressure ring, and clamping the two locking plates with an elastic clip. In addition, an inner sealing gasket and an outer sealing gasket are arranged between the two locking plates. The sealing effect is improved by multi-layer sealing. Moreover, the inner sealing gasket is arranged close to the pressure ring. Since the position where the pressure ring and the locking plate are connected is a bent structure, a gap is easily generated, resulting in air leakage, and it is difficult for the elastic clip to clamp this position. Therefore, an inner sealing gasket is arranged at this position to fill the gap and improve the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 is a cross-sectional view of the present invention;

[0020] Figure 3 The figure is a locked state diagram of the sealing gland and the elastic clip;

[0021] Figure 4 It is a structural schematic diagram of a sealing plug;

[0022] Figure 5 for Figure 4 Right view of;

[0023] Figure 6 for Figure 2 A magnified view of part A;

[0024] Figure 7 for Figure 2 A magnified view of part B;

[0025] Figure 8 for Figure 3 Enlarged view of part C.

[0026] Among them, 1 elastic clip, 101 driving rod, 102 fixing plate, 103 elastic plate, 2 sealing cover, 201 pressure ring, 3 sealing plug, 4 upper support shaft, 5 chain grate machine housing, 6 frame, 7 second sealing ring, 8 inner sealing gasket, 8a first inner step structure, 8b second inner step structure, 9 outer sealing gasket, 9a first outer step structure, 9b second outer step structure, 10 first sealing ring, 11 third sealing ring, 12 locking plate, 13 inner flange, 14 outer flange. DETAILED DESCRIPTION

[0027] The present invention is further explained below in conjunction with specific implementation methods. It should be understood that these implementation methods are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0028] like Figure 1-8As shown, a chain grate upper support shaft sealing device comprises an upper support shaft 4 rotatably mounted on a chain grate housing 5 through a bearing, the end of the upper support shaft 4 passes through the chain grate housing 5 and is mounted on a frame 6, the upper support shaft 4 and the frame 6 are rotatably connected through a bearing, two sealing plugs 3 arranged opposite to each other are sleeved on the outer periphery of the upper support shaft 4, a gap is left between the inner wall of the sealing plug and the outer wall of the upper support shaft, one of the sealing plugs 3 is mounted on the frame 6, and the other sealing plug 3 is mounted on the outer side of the chain grate housing 5, a sealing gland 2 is provided between the two sealing plugs 3, and the sealing gland 2 can be detachably mounted. The sealing plug 3 is installed on the outer periphery, and a first sealing ring 10 is provided between the sealing plug 3 and the sealing gland 2, a second sealing ring 7 is provided between one sealing plug 3 and the frame 6, and a third sealing ring 11 is provided between the other sealing plug 3 and the chain grate machine housing 5. The sealing gland 2 includes two arc-shaped pressing rings 201 arranged opposite to each other, one end of the two pressing rings 201 is hinged, and the other end of the two pressing rings 201 is provided with a locking plate 12, and the locking plates 12 of the two pressing rings 201 are locked by an elastic clip 1, and the end of the locking plate 12 away from the pressing ring 201 is provided with an outer flange 14, and the elastic clip The inner wall of the clamped locking plate 12 is provided with an inner flange 13 for pressing against the outer flange 14; each locking plate 12 is provided with an inner sealing gasket 8 at a position close to the pressing ring 201, and each locking plate 12 is provided with an outer sealing gasket 9 at a position away from the pressing ring 201; the inner sealing gasket 8 of one locking plate 12 is set as a first inner step structure 8a, and the inner sealing gasket 8 of the other locking plate 12 is set as a second inner step structure 8b, and the first inner step structure 8a and the second inner step structure 8b cooperate to press; the outer sealing gasket 9 of one locking plate 12 is set as a first outer step structure 9a, and the inner sealing gasket 8 of the other locking plate 12 is set as a second inner step structure 8b. The inner sealing gasket 8 of the fixed plate 12 is set as the second outer step structure 9b, and the first outer step structure 9a and the second outer step structure 9b cooperate with each other to press; the elastic clip 1 includes a clamping part for locking the two locking plates 12, and also includes a driving part for driving the clamping part to open and close; the clamping part includes two elastic plates 103, one end of the two elastic plates 103 is provided with an opening for clamping the two locking plates 12, and the other end of the two elastic plates 103 is provided with a connected fixed plate 102; the driving part includes a driving rod 101 arranged on the elastic plate 103, and the length of the driving rod 101 is greater than the length of the elastic plate 103.

[0029] The specific working process and principle of the present invention are as follows: the upper support shaft 4 is rotatably mounted on the chain grate machine housing 5 through a bearing, and the end of the upper support shaft 4 passes through the chain grate machine housing 5 and is fixed on the frame 6. At this time, the sealing plugs 3 are symmetrically installed on the outer periphery of the upper support shaft 4, one of the sealing plugs 3 is installed on the chain grate machine housing 5 through a fastener, and the other sealing plug 3 is installed on the frame 6 through a fastener, and then the sealing gland 2 is pressed between the two sealing plugs 3. The sealing gland 2 includes two hinged pressure rings 201, and the other ends of the two pressure rings 201 are clamped and fixed by an elastic clip 1. Through the setting of the elastic clip 1, the sealing gland is set to a quick-release structure for easy disassembly and installation. At this time, through The setting of the first sealing ring 10 improves the sealing between the sealing cover and the sealing plug 3 and prevents cold air from entering through the gap between the sealing cover and the sealing plug 3. At the same time, an inner sealing gasket 8 and an outer sealing gasket 9 are arranged between the two locking plates 12 to improve the sealing effect through multi-layer sealing. In addition, the inner sealing gasket 8 is arranged close to the pressure ring 201. Since the connecting position between the pressure ring 201 and the locking plate 12 is a bent structure, a gap is easily generated, resulting in air leakage, and it is difficult for the elastic clip 1 to clamp this position. Therefore, the inner sealing gasket 8 is arranged at this position to fill the gap and improve the sealing effect, thereby preventing cold air from entering the chain grate machine case 5, thereby ensuring the roasting quality of the dry ball and saving heat energy.

[0030] In the description of the present invention, it is necessary to understand that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0031] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0032] The above description shows and describes the preferred embodiments of the present invention. As mentioned above, it should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the invention concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not depart from the spirit and scope of the present invention, and should be within the scope of protection of the claims attached to the present invention.

Claims

1. A sealing device for a supporting shaft of a chain grate, characterized in that: It includes an upper support shaft which is rotatably installed on a chain grate machine housing through a bearing, the end of the upper support shaft passes through the chain grate machine housing and is installed on a frame, two sealing plugs which are arranged opposite to each other are sleeved on the outer periphery of the upper support shaft, a gap is left between the inner wall of the sealing plug and the outer wall of the upper support shaft, one of the sealing plugs is installed on the frame, and the other sealing plug is installed on the outer side surface of the chain grate machine housing, a sealing gland is provided between the two sealing plugs, the sealing gland can be detachably installed on the outer periphery of the sealing plug, a first sealing ring is provided between the sealing plug and the sealing gland, the sealing gland includes two arc-shaped pressure rings which are arranged opposite to each other, one end of the two pressure rings are hinged, the other end of the two pressure rings are provided with locking plates, the locking plates of the two pressure rings are locked by elastic clips, each locking plate is provided with an inner sealing gasket close to the pressure ring, and each locking plate is provided with an outer sealing gasket away from the pressure ring.

2. The upper support shaft sealing device of the chain grate according to claim 1, characterized in that: The inner sealing gasket of one locking plate is set as a first inner step structure, and the inner sealing gasket of the other locking plate is set as a second inner step structure, and the first inner step structure and the second inner step structure cooperate with each other to press against each other.

3. The upper support shaft sealing device of the chain grate according to claim 1, characterized in that: The outer sealing gasket of one locking plate is set as a first outer step structure, and the inner sealing gasket of the other locking plate is set as a second outer step structure. The first outer step structure and the second outer step structure cooperate with each other to press against each other.

4. The upper support shaft sealing device of the chain grate according to claim 1, characterized in that: The elastic clip comprises a clamping part for locking the two locking plates, and also comprises a driving part for driving the clamping part to open and close.

5. The upper support shaft sealing device of the chain grate according to claim 4, characterized in that: The clamping part comprises two elastic plates, one end of the two elastic plates is provided with an opening for clamping two locking plates, and the other end of the two elastic plates is provided with a connected fixing plate.

6. The upper support shaft sealing device of the chain grate according to claim 5, characterized in that: The driving part comprises a driving rod arranged on the elastic plate, and the length of the driving rod is greater than the length of the elastic plate.

7. The upper support shaft sealing device of the chain grate according to claim 1, characterized in that: The end of the locking plate away from the pressure ring is provided with an outer flange, and the inner wall of the locking plate clamped by the elastic clip is provided with an inner flange that presses against the outer flange.

8. The upper support shaft sealing device of the chain grate according to claim 1, characterized in that: A second sealing ring is arranged between one of the sealing plugs and the frame, and a third sealing ring is arranged between the other sealing plug and the chain grate machine casing.

9. The upper support shaft sealing device of the chain grate according to claim 1, characterized in that: The upper supporting shaft is rotatably connected to the frame via a bearing.

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