Coaxiality self-adjusting valve shaft

Abstract

The utility model belongs to the technical field of valve shafts, and discloses a coaxiality self-adjusting valve shaft. Comprising a front valve shaft, a fork type connecting piece, a connecting shaft, a fork type connecting piece and a rear valve shaft which are sequentially connected. The front valve shaft and the fork type connecting piece, the fork type connecting piece and the connecting shaft, and the fork type connecting piece and the rear valve shaft are connected through cotter pins and pin shafts; the fork type connecting piece comprises connecting pieces A, connecting pieces B and a supporting piece, the connecting pieces A and the connecting pieces B are arranged on the two sides of the supporting piece respectively, the bottoms of the connecting pieces A and the bottoms of the connecting pieces B are connected with the supporting piece respectively, the two connecting pieces A are oppositely arranged, the upper portion of each connecting piece A is provided with a through hole, the two connecting pieces B are oppositely arranged, the upper portion of each connecting piece B is provided with a through hole, and the connecting pieces A and the connecting pieces B are oppositely arranged. The connecting line of the through holes of the two connecting pieces A is perpendicular to the connecting line of the through holes of the two connecting pieces B. And valve shaft deformation and axial, radial and angular deformation of different degrees can be counteracted, so that the valve is good in matching effect and high in rigidity and strength, and is not influenced by deformation.

Description

Technical Field

[0001] The utility model belongs to the technical field of valve shafts and relates to a coaxiality self-adjusting valve shaft. Background Art

[0002] In the environment of 800℃~1000℃ in the pipeline of metallurgy, furnace, and organic waste gas purification system, or valves with long valve shafts under normal temperature conditions, in the current actual operating conditions, due to the excessive length of the valve shaft, when the valve body is affected by high temperature or external force, the relative position of the valve shaft will change, causing the valve shaft to be deflected and twisted. Such situations are likely to cause the valve to jam and vibrate during operation, and in severe cases, the valve shaft will break. The current solutions commonly adopted are: 1. Improve the machining accuracy of the valve shaft; 2. Strengthen the technical training of assembly personnel and improve the skills of assemblers to ensure the assembly quality. From the perspective of economy, the specific implementation costs of the above two methods are relatively high. It is not conducive to promotion and use, and it increases the difficulty and cost of production. 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 coaxial self-adjusting valve shaft with simple structure and manufacturing process, convenient assembly, and the ability to offset valve shaft deformation and different degrees of axial, radial and angular deformation, so that the valve has a good matching effect, high rigidity and strength, and is ensured not to be affected by deformation.

[0004] The technical solution adopted by the utility model to solve its technical problems is: a coaxial self-adjusting valve shaft, comprising a front valve shaft, a fork-type connector, a connecting shaft, a fork-type connector, and a rear valve shaft which are sequentially connected; the front valve shaft and the fork-type connector, the fork-type connector and the connecting shaft, and the fork-type connector and the rear valve shaft are all connected through a cotter pin and a pin shaft; the fork-type connector comprises a connector A, a connector B, and a support member, the connector A and the connector B are respectively arranged on both sides of the support member, the bottom of the connector A and the bottom of the connector B are respectively connected to the support member, two connectors A are arranged oppositely, and the upper part of each connector A is provided with a through hole, two connectors B are arranged oppositely, and the upper part of each connector B is provided with a through hole, and the connecting line of the through holes of the two connectors A is perpendicular to the connecting line of the through holes of the two connectors B.

[0005] The connecting shaft includes shaft A, shaft B, and a base; the bottom of shaft A and the bottom of shaft B are respectively connected to the base, and through holes are opened on shaft A and shaft B, and the through holes of shaft A and shaft B are opened in different directions, and the straight lines where the two through holes are located are perpendicular to each other.

[0006] Furthermore, one end of the front valve shaft is connected to the valve plate; a long hole is set at the end of the front valve shaft connected to the valve plate, and the long hole and the fixing member are connected to the valve plate. The front valve shaft drives the blade (existing structure) set on the valve shaft to move to realize the opening and closing function. The material of the front valve shaft is round steel.

[0007] Furthermore, the end of the rear valve shaft is connected to an actuator. The actuator is a prior art and is not particularly limited as long as it can achieve its working function. A cylinder is preferred.

[0008] Furthermore, the fork-type connector is made of round steel. The two ends are forked. The rear valve shaft is made of round steel.

[0009] Furthermore, the two connecting parts A, the two connecting parts B and the supporting part are an integrally formed part.

[0010] Furthermore, the support member is a four-sided structure with upper and lower openings, and a square groove with upper and lower openings is arranged inside the support member.

[0011] Furthermore, the base is disc-shaped.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The utility model provides a coaxial self-adjusting valve shaft, the substantial structure of which constitutes a double-section universal joint, which is simple to manufacture, convenient to assemble, easy to operate on and off, and greatly improved in flexibility, and can realize torque transmission when the front valve shaft and the rear valve shaft present the required working angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0015] Figure 1 The utility model is a structural schematic diagram of a coaxial self-adjusting valve shaft.

[0016] Figure 2 It is an axonometric view of a fork-type connector.

[0017] Figure 3 It is an axonometric drawing of the connecting axis.

[0018] In the figure, 1. front valve shaft, 2. cotter pin, 3. pin shaft, 4. fork-type connecting piece, 5. connecting shaft, 6. rear valve shaft, 7. connecting piece A, 8. connecting piece B, 9. supporting piece, 10. shaft A, 11. shaft B, 12. base. DETAILED DESCRIPTION

[0019] The present invention is further described below in conjunction with the accompanying drawings, but the present invention is not limited to the following embodiments.

[0020] Example 1

[0021] A coaxial self-adjusting valve shaft, such as Figure 1-3As shown, it includes a front valve shaft 1, a fork connector 4, a connecting shaft 5, a fork connector 4, and a rear valve shaft 6 which are sequentially connected; the front valve shaft 1 and the fork connector 4, the fork connector 4 and the connecting shaft 5, and the fork connector 4 and the rear valve shaft 6 are all connected through a cotter pin 2 and a pin shaft 3; the fork connector 4 includes a connector A7, a connector B8, and a support member 9, the connector A7 and the connector B8 are respectively arranged on both sides of the support member 9, the bottoms of the connector A7 and the connector B8 are respectively connected to the support member 9, two connector A7s are arranged opposite to each other, and a through hole is provided on the upper part of each connector A7, two connector B8s are arranged opposite to each other, and a through hole is provided on the upper part of each connector B8, and a connecting line of the through holes of the two connectors A7s is perpendicular to a connecting line of the through holes of the two connectors B8s.

[0022] The connecting shaft 5 includes a shaft A10, a shaft B11, and a base 12; the bottom of the shaft A10 and the bottom of the shaft B11 are respectively connected to the base 12, and through holes are opened on the shaft A10 and the shaft B11, and the through holes of the shaft A10 and the shaft B11 are opened in different directions, and the straight lines where the two through holes are located are perpendicular to each other.

[0023] One end of the front valve shaft 1 is connected to the valve plate; a long hole is set at the end of the front valve shaft 1 connected to the valve plate, and the front valve shaft 1 is connected to the valve plate through the long hole and the fixing part, so that the front valve shaft 1 drives the blades set on the valve shaft to move to realize the opening and closing function. The material of the front valve shaft 1 is round steel.

[0024] The end of the rear valve shaft 6 is connected to an actuator. The actuator is a prior art and is not particularly limited as long as it can achieve its working function. A cylinder is preferred.

[0025] The fork-type connector 4 is made of round steel. The two ends are forked. The rear valve shaft 6 is made of round steel.

[0026] The two connecting parts A 7, the two connecting parts B 8 and the supporting part 9 are integrally formed parts.

[0027] The support member 9 is a four-sided structure with openings at the top and bottom, and a square groove with openings at the top and bottom is arranged inside the support member 9.

[0028] The base 12 is disc-shaped.

[0029] The fork-type connector 4 is made of round steel, and both ends are milled with square grooves in the middle of the cross section, and the two ends are forked. One end of the front valve shaft 1 is assembled with the fork-type connector 4, and the pin shaft 3 is used to flexibly connect with the cotter pin 2;

[0030] The connecting shaft 5 is cylindrical, and the two ends are processed with flat surfaces to match the fork-type connecting piece 4. At the same time, the pin shaft 3 is movably connected with the cotter pin 2;

[0031] Two fork-type connecting members 4 are provided, and one connecting shaft 5 is provided;

[0032] The rear valve shaft 6 is made of round steel, one end of which is connected to the fork connector 4, and is positioned and connected with the cotter pin 2 using the pin shaft 3, and the other end is connected to the actuator to transmit the actuator torque;

[0033] Further explanation: the number of the cotter pins 2 and the pin shafts 3 are four each for connection;

[0034] After the coaxial self-adjusting valve shaft is applied to the valve, the special connection structure defined by the utility model can realize the adjustment of the longitudinal, lateral and angular angles, so it can offset the deformation caused by a series of reasons such as excessive valve shaft length or temperature difference, and ensure the reliable transmission of valve torque.

[0035] This type of coaxial self-adjusting valve shaft has a simple structure and is easy to manufacture. It can adjust the deformation caused by a series of reasons such as excessive valve shaft length or temperature difference, so that the adjusted valve can operate stably in the system.

[0036] 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 coaxial self-adjusting valve shaft, characterized in that: The invention comprises a front valve shaft (1), a fork-type connecting member (4), a connecting shaft (5), and a rear valve shaft (6) which are connected in sequence; the front valve shaft (1) and the fork-type connecting member (4), the fork-type connecting member (4) and the connecting shaft (5), and the fork-type connecting member (4) and the rear valve shaft (6) are all connected via a cotter pin (2) and a pin shaft (3); the fork-type connecting member (4) comprises a connecting member A (7), a connecting member B (8), and a supporting member (9); the connecting member A (7), The connecting members B (8) are respectively arranged on both sides of the supporting member (9); the bottom of the connecting member A (7) and the bottom of the connecting member B (8) are respectively connected to the supporting member (9); two connecting members A (7) are arranged opposite to each other, and each connecting member A (7) has a through hole on its upper part; two connecting members B (8) are arranged opposite to each other, and each connecting member B (8) has a through hole on its upper part; and a line connecting the through holes of the two connecting members A (7) is perpendicular to a line connecting the through holes of the two connecting members B (8).

2. A coaxial self-adjusting valve shaft as claimed in claim 1, characterized in that: The connecting shaft (5) comprises a shaft A (10), a shaft B (11), and a base (12); the bottom of the shaft A (10) and the bottom of the shaft B (11) are respectively connected to the base (12); the shaft A (10) and the shaft B (11) are both provided with through holes, and the through holes of the shaft A (10) and the through holes of the shaft B (11) are provided in different directions, and the straight lines where the two through holes are located are perpendicular to each other.

3. A coaxial self-adjusting valve shaft as claimed in claim 1, characterized in that: The two connecting parts A (7), the two connecting parts B (8) and the supporting part (9) are integrally formed parts.

4. A coaxial self-adjusting valve shaft as claimed in claim 1, characterized in that: The support member (9) is a four-sided structure with upper and lower openings.

5. The coaxial self-adjusting valve shaft according to claim 1, characterized in that: A square groove with upper and lower openings is arranged inside the support member (9).

6. A coaxial self-adjusting valve shaft as claimed in claim 1, characterized in that: The material of the front valve shaft (1) is round steel.

7. The coaxial self-adjusting valve shaft according to claim 1, characterized in that: The fork-type connecting piece (4) is made of round steel.

8. The coaxial self-adjusting valve shaft according to claim 1, characterized in that: The two ends of the fork-type connecting piece (4) are fork-shaped.

9. The coaxial self-adjusting valve shaft according to claim 1, characterized in that: The end of the rear valve shaft (6) is connected to the actuator.

10. A coaxial self-adjusting valve shaft as claimed in claim 2, characterized in that: The base (12) is disc-shaped.

Images