Low-leakage adjusting air valve
By using a combined structure of asbestos pad and press plate in the butterfly valve, the problem of poor sealing effect in high temperature environments is solved, and the sealing effect with low leakage and the convenience of replacement parts is achieved.
Patent Information
- Application Number
- CN202420062731.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-11
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-01-11
AI Technical Summary
The existing butterfly valves have poor sealing effect in high temperature environments, and the rubber sealing material is prone to wear during long-term use, resulting in weakening of the sealing effect, but it is inconvenient to replace the rubber.
The combination structure of asbestos pad and press plate is adopted. The asbestos pad is fitted with the baffle. The press plate is used to fix the asbestos pad to ensure that the valve has good sealing performance under high temperature environments and can be replaced with wear parts at any time.
The sealing effect of low leakage in high temperature environments is achieved, and the detachable design of the asbestos pad makes it easy to replace the worn parts, extending the service life of the valve.
Smart Images
Figure CN222479461U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of butterfly valves, and in particular relates to a low-leakage regulating air valve. Background Art
[0002] A butterfly valve, also known as a flap valve, is a simple regulating valve. The butterfly valve usually includes a valve body, a valve disc and a valve shaft. The valve body is provided with a through hole. The valve disc is usually disc-shaped and is arranged in the cavity. The valve disc rotates around the valve shaft to make the cavity through or closed to achieve the purpose of opening or closing. Existing butterfly valves usually have a baffle at the edge of the cavity. On the one hand, the baffle plays a role in limiting the rotation of the valve disc. On the other hand, the baffle is used in conjunction with the valve disc to play a sealing role. In order to enhance the sealing effect, the existing baffle is coated with rubber on the overlapping surface with the valve disc. Although this structure can achieve a certain sealing effect, it also has some disadvantages. For example, the butterfly valve of this structure cannot be used in a high temperature environment. For another example, the long-term opening and closing action of the butterfly valve is easy to cause rubber wear, and the sealing effect is weakened, but it is inconvenient to replace the rubber. Utility Model Content
[0003] The utility model provides a low leakage regulating air valve, which can effectively solve the problems in the prior art.
[0004] The utility model provides a low leakage regulating air valve, comprising a valve body, a valve disc, a valve shaft, a baffle, an asbestos pad and a pressure plate; the valve body is provided with a cylindrical cavity; the valve disc is arranged in the cavity and its shape corresponds to the cavity; the valve shaft comprises an upper valve shaft and a lower valve shaft; the bottom end of the upper valve shaft extends downward from the top of the valve body side wall and is fixed to the top of the valve disc; the top of the lower valve shaft extends upward from the bottom of the valve body side wall and is fixed to the bottom of the valve disc; the upper valve shaft and the lower valve shaft can both rotate around the axis; the baffle is arranged on the inner wall of the valve body cavity, and the baffle comprises a A left baffle and a right baffle; the left baffle and the right baffle are respectively located on the left and right sides of the line connecting the upper valve shaft and the lower valve shaft, and the left baffle and the right baffle are respectively located on the front and back sides of the valve disc; the asbestos pad comprises a left pad and a right pad; the left pad is arranged at the semicircular arc edge on the left side in front of the valve disc; the right pad is arranged at the semicircular arc edge on the right side behind the valve disc; when the valve is closed, the asbestos pad fits the baffle; the pressure plate comprises a left pressure plate and a right pressure plate; the left pressure plate is pressed on the left pad and fixes the left pad on the valve disc; the right pressure plate is pressed on the right pad and fixes the right pad on the valve disc.
[0005] As a further optimization of the utility model, the baffle and the valve body are made of the same material; the baffle is welded to the valve body.
[0006] As a further optimization of the utility model, the outer arc edge of the asbestos pad exceeds the outer arc edge of the valve disc, and when the valve disc is in a closed state, the asbestos pad abuts against the side wall of the cavity.
[0007] As a further optimization of the present invention, the pressure plate and the baffle plate are arc-shaped with corresponding shapes, and when the valve disc is in a closed state, the outer wall of the pressure plate fits with the inner wall of the baffle plate.
[0008] As a further optimization of the utility model, the left pressure plate and the right pressure plate fix the asbestos pad on the valve disc by bolts.
[0009] As a further optimization of the utility model, the valve shaft is cylindrical, and two ends of the asbestos pad are closely attached to the side wall of the upper valve shaft and the side wall of the lower valve shaft.
[0010] As a further optimization of the utility model, it also includes a shaft sleeve; the shaft sleeve is vertically arranged on the top of the side wall of the valve body; the top of the upper valve shaft protrudes from the valve body and is sleeved in the shaft sleeve.
[0011] As a further optimization of the utility model, it also includes an electric drive device; the electric drive device is arranged at the end of the shaft sleeve, and the output end of the electric drive device is connected to the top of the upper valve shaft.
[0012] As a further optimization of the utility model, the side wall of the shaft sleeve is provided with a heat sink.
[0013] As a further optimization of the utility model, the upper valve shaft and the lower valve shaft are connected to form a whole valve shaft.
[0014] The utility model provides a low leakage regulating air valve which can be used in a high temperature environment, has good sealing performance, and can replace the worn parts caused by the opening and closing of the valve at any time. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the structure of this embodiment;
[0016] Among them, there are valve body 1, valve disc 2, upper valve shaft 3a, lower valve shaft 3b, baffle 4, asbestos pad 5, pressure plate 6, shaft sleeve 7, electric drive device 8, and heat sink 9. DETAILED DESCRIPTION
[0017] This embodiment includes a valve body 1 , a valve flap 2 , a valve shaft, a baffle 4 , an asbestos pad 5 and a pressure plate 6 .
[0018] The valve body 1 is generally in the shape of a thin cylinder, and a cylindrical cavity is provided in the middle of the valve body 1, and the cavity is connected front to back. A valve flap 2 is provided in the cavity, and the valve flap 2 is in the shape of a disc and corresponds to the cavity. By rotating the valve flap 2, the valve flap 2 can completely block the cavity to close the valve, and the valve flap 2 can also be rotated to make the valve body 1 connected front to back to open the valve.
[0019] The valve shaft includes an upper valve shaft 3a and a lower valve shaft 3b. The bottom end of the upper valve shaft 3a extends from the top of the side wall of the valve body 1 and is fixed to the top of the valve disc 2, and the top of the lower valve shaft 3b extends upward from the bottom of the side wall of the valve body 1 and is fixed to the bottom of the valve disc 2. The axis lines of the upper valve shaft 3a and the lower valve shaft 3b are collinear, and both the upper valve shaft 3a and the lower valve shaft 3b can rotate around the axis lines. In other embodiments, the upper valve shaft 3a and the lower valve shaft 3b can also be made into a whole continuous valve shaft. The valve disc 2 realizes the opening and closing of the valve by rotating around the axis line of the valve shaft.
[0020] The baffle 4 is an arc-shaped sheet. The baffle 4 and the valve body 1 are made of the same metal material. The baffle 4 is welded to the inner wall of the cavity of the valve body 1. The baffle 4 includes a left baffle and a right baffle. The left baffle and the right baffle are respectively located on the left and right sides of the line connecting the upper valve shaft 3a and the lower valve shaft 3b. The left baffle and the right baffle are slightly misaligned front and back, so that the left baffle and the right baffle are respectively located on the front and back surfaces of the valve disc 2. When the valve disc 2 is closed, the left and right semicircular arc edges of the valve disc 2 are respectively fitted with the left baffle and the right baffle one after the other.
[0021] It should be noted that the directions such as up, down, left, right, front, back, top, bottom, etc. in this application are all in English. Figure 1 For reference.
[0022] Similarly, the asbestos pad 5 includes a left pad and a right pad, the left pad is arranged at the left edge of the front of the valve disc 2; the right pad is arranged at the right edge of the rear of the valve disc 2, and when the valve is closed, the asbestos pad 5 fits with the baffle 4. Preferably, the arc-shaped ends of the asbestos pad 5 are in close contact with the side walls of the upper valve shaft 3a and the lower valve shaft 3b. In this embodiment, the upper valve shaft 3a and the lower valve shaft 3b are cylindrical structures, and the asbestos pad 5 is a soft material. Therefore, when the valve disc 2 rotates, the asbestos pad 5 can play a good sealing role on the rotating position of the valve shaft.
[0023] The pressing plate 6 is mainly used to fix the asbestos pad 5. The pressing plate 6 includes a left pressing plate and a right pressing plate. The left pressing plate is pressed on the left pad to fix the left pad on the valve disc 2, and the right pressing plate is pressed on the right pad to fix the right pad on the valve disc 2. Preferably, the left pressing plate and the right pressing plate fix the asbestos pad 5 on the valve disc 2 by bolts. The bolts are detachable structures. When the asbestos pad 5 is worn and invalid due to frequent opening and closing of the valve, the asbestos pad 5 can be replaced at any time, which is very convenient.
[0024] Preferably, this embodiment is also provided with a sleeve 7, which is erected on the top of the side wall of the valve body 1, and the top of the upper valve shaft 3a protrudes from the valve body 1 and is sleeved in the sleeve 7. The sleeve 7 can protect the upper valve shaft 3a. Similarly, a sleeve can also be provided on the lower valve shaft 3b. Further, it also includes an electric drive device 8, which is provided at the end of the sleeve 7. The output end of the electric drive device 8 is connected to the top of the upper valve shaft 3a. The opening and closing of the valve flap 2 can be electrically controlled by the electric drive device 8. Further, the side wall of the sleeve 7 is provided with a heat sink 9, which can achieve good heat dissipation in a high temperature environment.
[0025] The baffle plate 4 in this embodiment is almost a semicircular arc shape. When the valve is closed, almost the entire arc edge of the asbestos pad 5 can fit with the baffle plate 4 to ensure the sealing effect. Preferably, the outer arc edge of the asbestos should slightly exceed the outer arc edge of the valve disc 2. When the valve disc 2 rotates, the asbestos pad 5 rubs against the side wall of the cavity of the valve body 1. This structure can further optimize the sealing effect when closed.
[0026] Preferably, the pressure plate 6 is in a semicircular arc shape corresponding to the shape of the baffle plate 4. When the valve is closed, the outer wall of the pressure plate 6 fits with the inner wall of the baffle plate 4, thereby further improving the sealing effect when closed.
[0027] The utility model provides a low leakage regulating air valve which can be used in a high temperature environment, has good sealing performance, and can replace the worn parts caused by the opening and closing of the valve at any time.
[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit the protection scope of the utility model. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the utility model.
Claims
1. A low leakage regulating air valve, characterized in that: Including valve body, valve disc, valve shaft, baffle, asbestos pad and pressure plate; The valve body is provided with a cylindrical cavity; The valve disc is arranged in the cavity and has a shape corresponding to the cavity; The valve shaft includes an upper valve shaft and a lower valve shaft; the bottom end of the upper valve shaft extends downward from the top of the valve body side wall and is fixed to the top of the valve disc; the top end of the lower valve shaft extends upward from the bottom of the valve body side wall and is fixed to the bottom of the valve disc; both the upper valve shaft and the lower valve shaft can rotate around the axis; The baffle is arranged on the inner wall of the valve body cavity, and the baffle includes a left baffle and a right baffle; the left baffle and the right baffle are respectively located on the left and right sides of the line connecting the upper valve shaft and the lower valve shaft, and the left baffle and the right baffle are respectively located on the front and rear sides of the valve disc; The asbestos pad includes a left pad and a right pad; the left pad is arranged at the semicircular edge on the left side in front of the valve disc; the right pad is arranged at the semicircular edge on the right side behind the valve disc; when the valve is closed, the asbestos pad fits with the baffle; The pressure plate comprises a left pressure plate and a right pressure plate; the left pressure plate is pressed on the left pad and fixed on the valve disc; the right pressure plate is pressed on the right pad and fixed on the valve disc.
2. A low leakage regulating air valve according to claim 1, characterized in that: The baffle plate is made of the same material as the valve body; the baffle plate is welded to the valve body.
3. A low leakage regulating air valve according to claim 1, characterized in that: The outer arc edge of the asbestos pad exceeds the outer arc edge of the valve disc. When the valve disc is in a closed state, the asbestos pad rests against the side wall of the cavity.
4. A low leakage regulating air valve according to claim 1, characterized in that: The pressure plate and the baffle are arc-shaped with corresponding shapes. When the valve disc is in a closed state, the outer wall of the pressure plate fits with the inner wall of the baffle.
5. A low leakage regulating air valve according to claim 1, characterized in that: The left pressure plate and the right pressure plate fix the asbestos pad on the valve disc by bolts.
6. A low leakage regulating air valve according to claim 1, characterized in that: The valve shaft is cylindrical, and two ends of the asbestos pad are closely attached to the side walls of the upper valve shaft and the lower valve shaft.
7. A low leakage regulating air valve according to claim 1, characterized in that: It also includes a shaft sleeve; the shaft sleeve is vertically arranged on the top of the side wall of the valve body; the top of the upper valve shaft extends out of the valve body and is sleeved in the shaft sleeve.
8. A low leakage regulating air valve according to claim 7, characterized in that: It also includes an electric drive device; the electric drive device is arranged at the end of the shaft sleeve, and the output end of the electric drive device is connected to the top of the upper valve shaft.
9. A low leakage regulating air valve according to claim 7, characterized in that: The side wall of the shaft sleeve is provided with heat sinks.
10. A low leakage regulating air valve according to claim 1, characterized in that: The upper valve shaft and the lower valve shaft are connected to form a whole valve shaft.