Double-eccentric rectangular closed valve

Abstract

The utility model belongs to the technical field of valves in pipelines of metallurgy, kilns, Vocs and dust removal ventilation systems, and discloses a double-eccentric rectangular closed valve. Comprising a valve body and a valve shaft. The valve shaft penetrates through the valve body, the middle area of the valve shaft is arranged in the valve body, the two ends of the valve shaft are arranged outside the valve body respectively, sealing mechanisms are arranged at the joints of the two ends of the valve shaft and the valve body for connection, and one end of the valve shaft is connected with the driving mechanism. The valve block group comprises a valve block, a rib plate for reinforcing is arranged on the back surface of the valve block, a valve seat is arranged at the top in the valve body, a cross rod is arranged above the valve shaft in the valve body, a rocker is further arranged in the valve body, one end of the rocker is connected with the cross rod, and the other end of the rocker is connected with the valve block through a connecting rod which is arranged on the valve block; a limiting rod is arranged on the valve body in the horizontal direction and arranged on one side of the back face of the valve block set. The valve is simple in structure and convenient to assemble, and it can be guaranteed that the effective ventilation area of the valve can be kept in the long-time operation process of the valve.

Description

Technical Field

[0001] The utility model belongs to the technical field of valves in pipelines of metallurgy, furnaces, VOCs and dust removal ventilation systems, and relates to a double-eccentric rectangular closed valve. Background Art

[0002] With the rapid development of modern industrial technology, valves are used more and more widely. As a control component in the ventilation duct system, valves have the functions of regulation and shutoff. In some systems for the transmission of toxic and harmful gases, in order to prevent leakage or overflow of the medium, there are strict requirements on the airtightness of the valve, because the leakage or escape of the valve will cause serious safety accidents. At present, there is a "Double Eccentric Multi-leaf Flexible Sealing Square Valve" (China / CN 213744949 U / 2021.07.20). This patent adopts the offset installation of the valve shaft and the valve plate to eliminate the leakage of the valve shaft position, and the sealing effect is improved to a certain extent. However, it cannot meet the requirement of zero leakage under higher pressure. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies in the above-mentioned background technology and to provide a double eccentric rectangular closed valve which has a simple structure and is easy to assemble and can ensure that the valve can maintain an effective ventilation area during long-term operation and can achieve zero leakage under a pressure of 30Kpa.

[0004] The technical solution adopted by the utility model to solve its technical problems is: a double eccentric rectangular closed valve, including a valve body and a valve shaft; the valve shaft is passed through the valve body, the middle area of ​​the valve shaft is placed inside the valve body, and the two ends of the valve shaft are respectively placed outside the valve body, and a sealing mechanism is arranged at the connection between the two ends of the valve shaft and the valve body, and one end of the valve shaft is connected to the driving mechanism; the valve shaft is connected to the valve plate group through a rocker arm group, and the valve plate group includes a valve plate, a reinforcing rib plate is arranged on the back of the valve plate, a valve seat is arranged on the top of the valve body, a cross bar is arranged above the valve shaft in the valve body, and a rocker is also arranged in the valve body, one end of the rocker is connected to the cross bar, and the other end is connected to the valve plate through a connecting rod, and the connecting rod is arranged on the valve plate, and a limit rod is arranged in the horizontal direction of the valve body, and the limit rod is arranged on one side of the back of the valve plate group.

[0005] The sealing mechanism includes a packing gland, two compression tubes, a packing sealing tube, and a graphite sealing ring. The two compression tubes and the graphite sealing ring are placed in the packing sealing tube, and the two compression tubes are respectively located at the upper and lower ends of the graphite sealing ring. The compression tube and the graphite sealing ring are sleeved on the outer periphery of the valve shaft, and the packing sealing tube is welded to the valve body as an integral whole; the packing gland is set on the pipe mouth of the packing sealing tube by bolts.

[0006] A rocker arm, a rocking lever and a connecting rod are arranged inside the valve body so that the valve shaft and the valve plate move in a four-bar linkage mechanism.

[0007] Furthermore, the valve shaft is made of round steel, and the material of the valve shaft is determined according to different working conditions; no specific restrictions are made, and specific working requirements can be met.

[0008] Furthermore, a flange for fixing the valve is arranged on the end face of the valve body.

[0009] Furthermore, the sealing mechanism is used to thermally seal the connection between the valve shaft and the valve body.

[0010] Furthermore, the valve body is formed by pressing and welding steel plates or plate strips.

[0011] Furthermore, the flange, rib, valve plate, rocker arm, rocker arm and connecting rod are all processed by a laser cutting machine.

[0012] Furthermore, the valve body is a rectangular valve body, and is not limited to a square depending on the size.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The utility model provides a double eccentric rectangular closed valve, which is easy to assemble, has high airtightness, small wind resistance, high pressure resistance, flexible switching, and a more stable overall structure. It can be used in various complex working conditions systems to ensure stable operation of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0016] Figure 1 It is an axonometric view of a double-eccentric rectangular closed valve of the utility model.

[0017] Figure 2 It is a front view of a double eccentric rectangular closed valve of the utility model.

[0018] Figure 3 yes Figure 2 AA section view.

[0019] In the figure: 1. valve body, 2. flange, 3. sealing mechanism, 4. bearing bracket, 5. diamond bearing group, 6. valve plate group, 6-1. valve plate, 6-2. rib plate, 7. rocker, 8. rocker arm group, 8-1. rocker arm, 8-2. rocker arm sleeve, 9. valve shaft, 10. actuator bracket, 11. adapter, 12. valve seat, 12-1. sealing strip, 12-2. rib, 13. limit rod, 14. connecting rod. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with the accompanying drawings, but the present invention is not limited to the following embodiments.

[0021] Example 1

[0022] A double eccentric rectangular closed valve, such as Figure 1-Figure 3 As shown, it includes a valve body 1 and a valve shaft 9; the valve shaft 9 is penetrated on the valve body 1, the middle area of ​​the valve shaft 9 is placed in the valve body 1, both ends of the valve shaft 9 extend out of the valve body 1, and a sealing mechanism 3 is arranged at the connection between the valve shaft 9 placed outside the valve body 1 and the valve body 1, and the two ends of the valve shaft 9 are respectively penetrated by the sealing mechanism 3 and connected with the diamond bearing group 5, and the end of the diamond bearing group 5 at one end is provided with an adapter 11; the valve shaft 9 and the diamond bearing group 5 are interference fit; a valve seat 12 is arranged in the valve body 1, and a valve plate group 6 is arranged on the valve shaft 9 arranged in the valve body 1; the valve shaft 9 is connected to the valve plate group 6 through a rocker arm group 8, one end of the adapter 11 is key-connected to the valve shaft 9, and the other end of the adapter 11 is connected to the driving mechanism.

[0023] Bearing brackets 4 are arranged at both ends of the valve body 1, and the bearing bracket 4 at one end is connected to the actuator bracket 10. The actuator bracket 10 is arranged between the driving mechanism and the bearing bracket 4, and the actuator bracket 10 is fixed on the bearing bracket 4, and the driving mechanism is fixed on the actuator bracket 10. The driving mechanism is an actuator. However, the model is not limited, as long as the working function is achieved.

[0024] The valve seat 12 includes a rib 12-2 and a sealing strip 12-1, wherein the sealing strip 12-1 is fixed on the rib 12-2. The valve seat 12 is arranged at the top inside the valve body 1, the valve seat 12 is fully welded on the valve body 1 and the rib 12-2 is connected (welded) to the inner wall of the valve body 1.

[0025] The rocker arm assembly 8 comprises a rocker arm 8-1 and a rocker arm sleeve 8-2, wherein the rocker arm 8-1 is welded and fixed to the rocker arm sleeve 8-2; the rocker arm sleeve 8-2 is sleeved on the valve shaft, one end of the rocker arm 8-1 is connected to the rocker arm sleeve 8-2, and the other end is connected to the connecting rod 14 on the valve plate assembly through a pin shaft.

[0026] Preferably, two rocker arm groups 8 are provided.

[0027] The valve plate group 6 includes a valve plate 6-1 and a rib plate 6-2, and the valve plate 6-1 and the rib plate 6-2 are fixed by intermittent welding. The rib plate 6-2 is arranged on the back of the valve plate 6-1. The connecting rod 14 is arranged on the valve plate group. The connecting rod 14 is arranged on the side opposite to the rib plate 6-2.

[0028] The valve body 1 is provided with a limit rod 13 in the horizontal direction, and the limit rod 13 is arranged on the back side of the valve plate group 6. A cross bar is arranged above the valve shaft in the valve body, and a rocker is also arranged in the valve body, one end of the rocker is connected to the cross bar, and the other end is connected to the valve plate through a connecting rod and a pin shaft.

[0029] The sealing mechanism 3 includes a packing gland, two compression tubes, a packing sealing tube, and a graphite sealing ring. The two compression tubes and the graphite sealing ring are placed in the packing sealing tube, and the two compression tubes are respectively located at the upper and lower ends of the graphite sealing ring. The compression tube and the graphite sealing ring are sleeved on the outer periphery of the valve shaft 9, and the packing sealing tube is welded to the valve body 1 as an integral whole; the packing gland is set on the pipe mouth of the packing sealing tube by bolts.

[0030] The diamond bearing group 5 includes a rolling bearing and a bearing seat. The rolling bearing is arranged on the bearing seat. The rolling bearing sleeve is arranged on the valve shaft 9. The bearing seat is arranged on the bearing bracket 4. The diamond bearing group 5 is fixed to the bearing bracket 4 by bolts.

[0031] The adapter 11 is a connector, connected to the valve shaft 9 through a square key, and the square key of the adapter 11 is inserted into the actuator to connect the valve shaft 9 and the actuator together; the actuator is any type of actuator driven by a hydraulic actuator, a pneumatic actuator, or a handwheel actuator, and is not limited to a specific model, as long as its working function is achieved. The actuator is set on the actuator bracket 10 by bolts, and the actuator bracket 10 is connected and fixed to the valve body 1 through the bearing bracket 4.

[0032] The two end surfaces of the valve body 1 are provided with flanges 2 for fixing the valve, and the flanges 2 and the valve body 1 are fixed by welding.

[0033] The sealing mechanism 3 is used for thermally insulating and sealing the connection between the valve shaft 9 and the valve body 1 .

[0034] The valve body 1 is a rectangular valve body 1 .

[0035] The valve shaft 9 is made of round steel and then a keyway with a length of 100 mm is processed on one end of the valve shaft 9 by a milling machine.

[0036] The flange 2, the rib 12-2 and the valve plate 6-1 are formed by laser cutting of flat steel plates.

[0037] The bearing bracket 4 and the actuator bracket 10 are made of flat steel plates by laser cutting and then processed by a bending process.

[0038] The rectangular valve body 1 is laser cut from a flat steel plate and pressed into an L-shape by a bending machine. The two L-shapes are welded into one piece by argon arc welding. At the same time, the flange 2, the valve seat 12, the sealing mechanism 3 and the bearing bracket 4 are welded to the rectangular valve body 1.

[0039] The sealing mechanism 3 comprises a packing gland, two compression tubes, a packing sealing tube and a graphite sealing ring. The compression tube and the packing sealing tube are made of seamless steel tubes. During assembly, a compression tube is first placed in the packing sealing tube, and then six graphite sealing rings are filled, and then a compression tube is placed on it, and finally the packing gland is installed. The sealing performance is adjusted by tightening the bolts on the packing gland.

[0040] The limit rod 13 is laser cut from a flat steel plate or strip, pressed into a U shape by a bending machine, and fixed inside the valve body 1 near the flange 2 at one end by argon arc welding to limit the valve plate group to a 90° position when it is opened.

[0041] The utility model double eccentric rectangular airtight valve, when the valve is opened, the valve plate group 6 performs translational movement, so that the valve plate group 6 is separated from the valve seat 12 and the valve is gradually opened, and the opposite is true when it is closed. After being connected to the working system pipeline, when the gas medium flows through the valve, the positions of the valve body 1, the flange 2, the valve plate group 6, and the sealing mechanism 3 are all subjected to the internal pressure. Since the closing direction of the valve plate group 6 is the same as the gas flow direction, the airtightness of the double eccentric rectangular valve also changes with the change of wind speed and pressure. The graphite sealing ring filled by the sealing mechanism 3 and the valve shaft 9 are fixed by the diamond bearing group 5. The double eccentric rectangular airtight valve adopts a new valve plate fixing method (by setting the swing rod 8-1, the rocker 7, and the connecting rod 14, the valve shaft 9 and the valve plate 6-1 form a four-link mechanism movement), reducing the leakage point at the connection position of the valve shaft 9 and the valve plate group 6. Not only the leakage rate is guaranteed to be zero, the sealing is improved, and the rotation resistance is reduced, the noise during the operation of the valve is reduced, and the double eccentric rectangular airtight valve is guaranteed to run smoothly to realize the shutoff and regulation functions.

[0042] Although the utility model has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the utility model. Therefore, these modifications or improvements made without departing from the spirit of the utility model are within the scope of protection claimed by the utility model.

Claims

1. A double eccentric rectangular closed valve, characterized in that it includes A valve body (1) and a valve shaft (9); the valve shaft (9) is passed through the valve body (1), the middle area of ​​the valve shaft (9) is arranged in the valve body (1), the two ends of the valve shaft (9) extend out of the valve body (1), a sealing mechanism (3) is arranged at the connection between the valve shaft (9) and the valve body (1) arranged outside the valve body (1), the two ends of the valve shaft (9) are respectively passed through the sealing mechanism (3) and connected to the diamond bearing group (5), and an adapter (11) is arranged at the end of the diamond bearing group (5) at one end; the valve shaft (9) and the diamond bearing group (5) are interference fit; a valve seat (12) is arranged in the valve body (1), and a valve plate group (6) is arranged on the valve shaft (9) arranged in the valve body (1); the valve shaft (9) is connected to the valve plate group (6) through a rocker arm group (8), one end of the adapter (11) is key-connected to the valve shaft (9), and the other end of the adapter (11) is connected to a driving mechanism.

2. A double eccentric rectangular sealed valve as claimed in claim 1, characterized in that: Bearing brackets (4) are arranged at both ends of the valve body (1), and the bearing bracket (4) at one end is connected to the actuator bracket (10).

3. A double eccentric rectangular sealed valve as claimed in claim 1, characterized in that: The valve seat (12) comprises a retaining edge (12-2) and a sealing strip (12-1), wherein the sealing strip (12-1) is fixed on the retaining edge (12-2), the valve seat (12) is arranged at the top inside the valve body (1), the valve seat (12) is fully welded to the valve body (1), and the retaining edge (12-2) is connected to the inner wall of the valve body (1).

4. A double eccentric rectangular sealed valve as claimed in claim 1, characterized in that: The rocker arm assembly (8) comprises a rocker arm (8-1) and a rocker arm sleeve (8-2); the rocker arm (8-1) and the rocker arm sleeve (8-2) are welded and fixed; the rocker arm sleeve (8-2) is sleeved on the valve shaft; one end of the rocker arm (8-1) is connected to the rocker arm sleeve (8-2), and the other end is connected to a connecting rod (14) on the valve plate assembly (6) via a pin shaft.

5. A double eccentric rectangular sealed valve as claimed in claim 1, characterized in that: The valve plate group (6) comprises a valve plate (6-1) and a rib plate (6-2); the valve plate (6-1) and the rib plate (6-2) are fixed by intermittent welding; and the rib plate (6-2) is arranged on the back of the valve plate (6-1).

6. A double eccentric rectangular sealed valve as claimed in claim 1, characterized in that: A limiting rod (13) is arranged on the valve body (1) in the horizontal direction, and the limiting rod (13) is arranged on one side of the back side of the valve plate group (6).

7. A double eccentric rectangular sealed valve as claimed in claim 1, characterized in that: The sealing mechanism (3) comprises a packing gland, two compression tubes, a packing sealing tube, and a graphite sealing ring. The two compression tubes and the graphite sealing ring are placed in the packing sealing tube, and the two compression tubes are respectively located at the upper and lower ends of the graphite sealing ring. The compression tube and the graphite sealing ring are sleeved on the outer periphery of the valve shaft (9), and the packing sealing tube and the valve body (1) are welded together; the packing gland is arranged on the pipe opening of the packing sealing tube by means of bolts.

8. A double eccentric rectangular sealed valve as claimed in claim 1, characterized in that: The diamond bearing group (5) comprises a rolling bearing and a bearing seat, the rolling bearing is arranged on the bearing seat, the rolling bearing sleeve is arranged on the valve shaft (9), the bearing seat is arranged on the bearing bracket (4), and the diamond bearing group (5) is fixed to the bearing bracket (4) by bolts.

9. A double eccentric rectangular sealed valve as claimed in claim 1, characterized in that: The two end surfaces of the valve body (1) are provided with flanges (2) for fixing the valve.

10. A double eccentric rectangular sealed valve as claimed in claim 2, characterized in that: The actuator bracket (10) is arranged between the driving mechanism and the bearing bracket (4), and the driving mechanism is fixed on the actuator bracket (10).

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