Casting four-connecting-rod butterfly valve with reverse blowing structure

Abstract

The utility model is suitable for the technical field of control butterfly valves, and provides a casting four-connecting-rod butterfly valve with a reverse blowing structure, which comprises a valve body and a valve core rotationally connected inside the valve body, the rotating shaft is used for controlling the valve element to rotate, and stuffing boxes are arranged at the two ends of the rotating shaft; the anti-leakage assembly is fixedly arranged on the valve body and used for pressing and sealing the stuffing box, the anti-leakage assembly comprises a pressing sleeve for pressing the stuffing box and a pressing part for pushing the pressing sleeve, the pressing part rotates and pushes the pressing sleeve to slide on a rotating shaft, the rotating shaft is sleeved with a driving part, and the driving part drives the stuffing box to slide on the rotating shaft. The driving part rotates and drives the pressing parts to rotate synchronously at the same time, so that by arranging a structure for driving all the pressing parts on the same side to rotate synchronously, it is guaranteed that when the pressing force needs to be adjusted, all the pressing parts are driven to rotate synchronously by rotating the driving part, and therefore the consistency of adjustment of the pressing parts is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of control butterfly valves, in particular to a four-link butterfly valve with a reverse blowing structure casting. Background Art

[0002] The high-temperature butterfly valve from the outlet of the catalytic smoke machine to the inlet of the waste heat boiler has a bad working condition. The normal operating temperature is about 600℃, and the design temperature is as high as 750℃. The medium contains catalyst dust particles and some gases such as CO / SO2. It is fully open during normal use. The valve opening needs to be adjusted according to production during the start-up and shutdown period. However, in the event of an accident (desulfurization and denitrification waste heat boiler, desulfurization integrated tower or catalytic cracking smoke machine, etc.), the valve needs to be closed quickly. If it cannot be closed, it will cause serious losses to production. In addition, in this working condition, when the machine is shut down for maintenance or in an accident, the pipeline needs to be tightly disconnected. In addition, under the current national advocacy of ultra-low emissions, zero leakage is generally required.

[0003] At present, traditional solutions all use water seal tank plus ventilation butterfly valve technology, which uses ventilation butterfly valve for adjustment and water seal tank for sealing. Due to the harsh operating conditions, most butterfly valves cannot work normally and are stuck and cannot be opened or closed. The use of water seal tanks can achieve strict shutoff, but the operation is very troublesome, especially in the Northeast region in winter. It also takes up a lot of on-site space and has a large pressure drop, which will affect the work of the range hood, increase energy consumption, and increase costs.

[0004] In the conventional technology, a Chinese utility model patent with announcement number CN210890147U discloses a four-link eccentric butterfly valve for a catalytic device, which compresses the stuffing box that needs to be compressed by setting a bolt structure to ensure the sealing effect. However, when the clamping force needs to be adjusted, since it has multiple bolt structures, each bolt needs to be adjusted individually, which easily leads to errors in bolt adjustment, resulting in poor consistency, affecting the force uniformity of the guide sleeve, and causing the guide sleeve to deviate and get stuck.

[0005] In summary, the prior art obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0006] In view of the above-mentioned defects, the purpose of the utility model is to provide a four-link butterfly valve with a back-blowing structure casting, which can be equipped with a structure for driving all the clamping parts on the same side to rotate synchronously, thereby ensuring that when the clamping force needs to be adjusted, all the clamping parts are driven to rotate synchronously by rotating the driving part, thereby achieving consistency in the adjustment of the clamping parts.

[0007] In order to achieve the above-mentioned purpose, the utility model provides a four-link butterfly valve with a back-blowing structure casting, comprising: a valve body and a valve core rotatably connected to the inside of the valve body; a rotating shaft for controlling the rotation of the valve core, and stuffing boxes are provided at both ends of the rotating shaft; an anti-leakage component fixed to the valve body for compressing and sealing the stuffing box, the anti-leakage component comprising a compression sleeve for compressing the stuffing box and a compression piece for pushing the compression sleeve, the compression piece rotates and pushes the compression sleeve to slide on the rotating shaft, a driving piece is sleeved on the rotating shaft, and the driving piece rotates and drives several of the compression pieces to rotate synchronously at the same time.

[0008] According to the utility model of the four-link butterfly valve with reverse blowing structure casting, a thrust spring is provided between the clamping piece and the clamping sleeve, a screw is provided on the valve body, the thrust spring and the clamping sleeve are sleeved on the screw, and the clamping piece is threadedly connected to the screw.

[0009] According to the utility model of the four-link butterfly valve with reverse blowing structure casting, a driving gear is provided at the end of the driving member, and the clamping member is a driven gear meshing with the driving gear, and the rotation of the driving gear drives the clamping member to rotate on the screw.

[0010] According to the utility model of the four-link butterfly valve with reverse blowing structure casting, a sliding sleeve is provided between the thrust spring and the screw rod, one end of the sliding sleeve abuts against the clamping sleeve and the other end abuts against the clamping piece.

[0011] According to the utility model of the four-link butterfly valve with reverse blowing structure casting, an abutment sleeve is slidably provided on the rotating shaft, the abutment sleeve is slidably connected to the screw rod, one end of the abutment sleeve abuts on the sliding sleeve and the other end abuts on the clamping sleeve.

[0012] According to the utility model of the four-link butterfly valve with a reverse blowing structure casting, a clamping cover for clamping the rotating shaft is provided at the end of the rotating shaft, the clamping cover is fixed on the valve body, the end cover of the clamping cover is tightly attached to the end of the rotating shaft, an arc-shaped hole is provided on the clamping cover, and a toggle portion passing through the arc-shaped hole is provided at the end of the driving member.

[0013] The utility model provides a four-link butterfly valve with a back-blowing structure casting, comprising: a valve body and a valve core rotatably connected to the inside of the valve body, the opening and closing of the butterfly valve is controlled by the valve core, and an air inlet and a sewage outlet are arranged on the valve body, so that air can be supplied through the air inlet to realize internal backblowing of the butterfly valve and seal the butterfly valve at the same time; a rotating shaft for controlling the rotation of the valve core, both ends of the rotating shaft are provided with stuffing boxes, and the rotating shaft is sealed by setting the stuffing box; an anti-leakage component fixedly arranged on the valve body to compress and seal the stuffing box, the stuffing box is compressed by the anti-leakage component to ensure the sealing effect of the stuffing box, and at the same time, some expansion margin is given to the stuffing box during thermal expansion, and the anti-leakage component includes a stuffing box A compression sleeve for compressing the stuffing box and a compression piece for pushing the compression sleeve, the compression piece rotates and pushes the compression sleeve to slide on the rotating shaft, thereby adjusting the compression force on the stuffing box and realizing the adjustment of the sealing effect of the stuffing box, and a driving piece is sleeved on the rotating shaft, and the driving piece rotates and drives several of the compression pieces to rotate synchronously at the same time, thereby realizing the rotation of a single driving piece and synchronously adjusting the compression pieces to ensure the consistency of the adjustment of the compression pieces. In summary, the technical effect produced by the utility model is that a structure is set up to drive all the compression pieces on the same side to rotate synchronously, thereby ensuring that when the compression force needs to be adjusted, all the compression pieces are driven to rotate synchronously by rotating the driving piece, thereby realizing the consistency of the adjustment of the compression pieces. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model;

[0015] Figure 2 yes Figure 1 The enlarged structural diagram of part A in the middle;

[0016] Figure 3 It is a three-dimensional structural schematic diagram of the driving component of the utility model;

[0017] Figure 4 This is a schematic diagram of the three-dimensional structure of the compression cover of the utility model;

[0018] In the figure, 1-valve body, 2-drain port, 3-air inlet, 4-valve core, 5-rotating shaft, 6-thrust spring, 7-sleeve, 8-pressing member, 9-driving member, 91-sliding part, 92-driving gear, 10-pressing cover, 101-arc hole, 102-end cover, 12-screw, 13-pressing sleeve, 14-stuffing box. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0020] See also Figure 1 and Figure 2 The utility model provides a four-link butterfly valve with a back-blowing structure casting, which includes a valve body 1 and a valve core 4 rotatably connected to the inside of the valve body 1, the opening and closing of the butterfly valve is controlled by the valve core 4, and an air inlet 3 and a sewage outlet 2 are arranged on the valve body 1, so that air can be supplied through the air inlet 3 to realize internal backblowing of the butterfly valve and seal the butterfly valve at the same time (existing technology, no longer repeated); a rotating shaft 5 for controlling the rotation of the valve core 4, both ends of the rotating shaft 5 are provided with stuffing boxes 14, and the rotating shaft 5 is sealed by setting the stuffing box 14; an anti-leakage component fixedly arranged on the valve body 1 to compress and seal the stuffing box 14, and the anti-leakage component is used to prevent the leakage of the butterfly valve. The stuffing box 14 is compressed to ensure the sealing effect of the stuffing box 14, and at the same time, some expansion margin is guaranteed for the stuffing box 14 during thermal expansion. The anti-leakage component includes a compression sleeve 13 for compressing the stuffing box 14 and a compression member 8 for pushing the compression sleeve 13. The compression member 8 rotates and pushes the compression sleeve 13 to slide on the rotating shaft 5, so as to adjust the compression force on the stuffing box 14 and realize the adjustment of the sealing effect of the stuffing box 14. A driving member 9 is sleeved on the rotating shaft 5. The driving member 9 rotates and drives several of the compression members 8 to rotate synchronously, so as to realize the rotation of a single driving member 9 and synchronously adjust the compression member 8 to ensure the consistency of the adjustment of the compression member 8.

[0021] Preferably, a thrust spring 6 is provided between the clamping piece 8 and the clamping sleeve 13 of the utility model, a screw 12 is provided on the valve body 1, the thrust spring 6 and the clamping sleeve 13 are sleeved on the screw 12, and the clamping piece 8 is screwed on the screw 12. By rotating the clamping piece 8, the position of the clamping piece 8 on the screw 12 is adjusted. At this time, the pressure between the clamping piece 8 and the thrust spring 6 can be adjusted, thereby adjusting the force of the clamping sleeve 13 to clamp the stuffing box 14.

[0022] See also Figure 1 to Figure 4In addition, a driving gear 92 is provided at the end of the driving member 9 of the utility model, and the pressing member 8 is a driven gear meshing with the driving gear 92. The driving gear 92 rotates to drive the pressing member 8 to rotate on the screw 12, so as to adjust the force of the pressing member 8 on the screw 12. A pressing cover 10 is provided at the end of the rotating shaft 5 for pressing the rotating shaft 5. The pressing cover 10 is fixed on the valve body 1, and the end cover 102 of the pressing cover 10 is close to the end of the rotating shaft 5. An arc hole 101 is provided on the pressing cover 10. A toggle portion 91 is provided at the end of the driving member 9 and penetrates the arc hole 101. When it is necessary to adjust the position of the pressing member 8, the toggle portion 91 is manually rotated to realize the rotation of the driving member 9, and the force of the pressing member 8 is further adjusted. In order to prevent the pressing member 8 and the driving member 9 from separating, the arc hole 101 at this time effectively limits the rotation angle of the driving member 9, and also limits the position of the pressing member 8.

[0023] Furthermore, a sliding sleeve 7 is provided between the thrust spring 6 and the screw rod 12 of the utility model, one end of the sliding sleeve 7 abuts against the clamping sleeve 13 and the other end abuts against the clamping member 8, an abutting sleeve is slidably provided on the rotating shaft 5, the abutting sleeve is slidably connected to the screw rod 12, one end of the abutting sleeve abuts against the sliding sleeve 7 and the other end abuts against the clamping sleeve 13, the abutting sleeve ensures that the sliding sleeve 7 can be pressed against the clamping sleeve 13, thereby ensuring the clamping effect of the clamping sleeve 13.

[0024] In this embodiment, during use, when the stuffing box 14 needs to be compressed, the toggle part 91 is rotated, and the toggle part 91 drives the driving member 9 to rotate, so that the driving gear 92 drives all the compression members 8 meshing therewith to rotate. The rotation of the compression members 8 adjusts the position of the compression members 8 on the screw rod 12, and further controls the force of the compression thrust spring 6, thereby realizing the adjustment of the force of compressing the stuffing box 14, and realizing the synchronous adjustment of the compression members 8 at the same time, thereby reducing the consistency error caused by a single adjustment and affecting the compression effect.

[0025] In summary, the utility model provides a four-link butterfly valve with a back-blowing structure casting, including: a valve body and a valve core rotatably connected to the inside of the valve body, the opening and closing of the butterfly valve is controlled by the valve core, and an air inlet and a sewage outlet are arranged on the valve body, so that air can be supplied through the air inlet to realize internal backblowing of the butterfly valve and seal the butterfly valve at the same time; a rotating shaft for controlling the rotation of the valve core, both ends of the rotating shaft are provided with stuffing boxes, and the rotating shaft is sealed by setting the stuffing box; an anti-leakage component fixedly arranged on the valve body to compress and seal the stuffing box, the stuffing box is compressed by the anti-leakage component to ensure the sealing effect of the stuffing box, and at the same time, some expansion margin is given to the stuffing box during thermal expansion, and the anti-leakage component includes A compression sleeve for compressing the stuffing box and a compression piece for pushing the compression sleeve, the compression piece rotates and pushes the compression sleeve to slide on the rotating shaft, thereby adjusting the compression force on the stuffing box and realizing the adjustment of the sealing effect of the stuffing box, and a driving piece is sleeved on the rotating shaft, and the driving piece rotates and drives several of the compression pieces to rotate synchronously at the same time, thereby realizing the rotation of a single driving piece and synchronously adjusting the compression pieces to ensure the consistency of the adjustment of the compression pieces. In summary, the technical effect produced by the utility model is that a structure is set up to drive all the compression pieces on the same side to rotate synchronously, thereby ensuring that when the compression force needs to be adjusted, all the compression pieces are driven to rotate synchronously by rotating the driving piece, thereby realizing the consistency of the adjustment of the compression pieces.

[0026] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, technicians familiar with the field can make various corresponding changes and deformations based on the present invention, but these corresponding changes and deformations should all fall within the scope of protection of the claims attached to the present invention.

[0027] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

Claims

1. A four-link butterfly valve with a reverse blowing structure casting, characterized in that: include: A valve body and a valve core rotatably connected to the inside of the valve body; A rotating shaft for controlling the rotation of the valve core, with stuffing boxes provided at both ends of the rotating shaft; An anti-leakage component is fixedly mounted on the valve body to compress and seal the stuffing box. The anti-leakage component includes a compression sleeve for compressing the stuffing box and a compression piece for pushing the compression sleeve. The compression piece rotates and pushes the compression sleeve to slide on the rotating shaft. A driving piece is sleeved on the rotating shaft. The driving piece rotates and drives several of the compression pieces to rotate synchronously.

2. The four-link butterfly valve with reverse blowing structure casting according to claim 1 is characterized in that: A thrust spring is arranged between the pressing piece and the pressing sleeve, a screw rod is arranged on the valve body, the thrust spring and the pressing sleeve are sleeved on the screw rod, and the pressing piece is threadedly connected to the screw rod.

3. The four-link butterfly valve with reverse blowing structure casting according to claim 2 is characterized in that: A driving gear is disposed at the end of the driving member, and the pressing member is a driven gear meshed with the driving gear. The driving gear rotates to drive the pressing member to rotate on the screw rod.

4. The four-link butterfly valve with reverse blowing structure casting according to claim 2 is characterized in that: A sliding sleeve is arranged between the thrust spring and the screw rod, one end of the sliding sleeve abuts against the pressing sleeve and the other end of the sliding sleeve abuts against the pressing member.

5. The four-link butterfly valve with reverse blowing structure casting according to claim 4 is characterized in that: An abutment sleeve is slidably provided on the rotating shaft, and the abutment sleeve is slidably connected to the screw rod, and one end of the abutment sleeve abuts on the sliding sleeve and the other end abuts on the pressing sleeve.

6. The four-link butterfly valve with reverse blowing structure casting according to claim 3 is characterized in that: A clamping cover for clamping the rotating shaft is provided at the end of the rotating shaft, the clamping cover is fixed on the valve body, the end cover of the clamping cover is tightly attached to the end of the rotating shaft, an arc-shaped hole is provided on the clamping cover, and a toggle portion passing through the arc-shaped hole is provided at the end of the driving member.

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