A pneumatic valve positioner

Abstract

This utility model provides a pneumatic valve positioner, including a valve body, a cylinder frame at the top of the valve body, a support arm movably mounted inside the cylinder frame, a positioning frame installed inside the mounting groove, and an upper positioning block and a lower positioning block movably mounted inside the inner guide groove. This utility model installs a positioning frame on the outside of the cylinder frame of the valve body. The positioning frame has two adjustable upper and lower positioning blocks inside. The cylinder frame has a support arm and a collar for fixing the valve stem. After the positioning frame is installed, the upper and lower positioning blocks on its inner side can extend into the guide groove. When the support slider on the side of the support arm slides inside the guide groove, the top and bottom of the valve stem are limited by the upper and lower positioning blocks, thus limiting the valve stem and valve. The entire limiting mechanism is simple and efficient, and also allows for convenient adjustment of the positioning position.

Description

Technical Field

[0001] This utility model belongs to the field of valve technology and relates to a pneumatic valve positioner. Background Technology

[0002] Pneumatic valves are valves driven by compressed air and can be used to control the flow of various types of fluids, such as air, water, steam, corrosive media, mud, oil, liquid metals, and radioactive media.

[0003] Traditional pneumatic valves typically use cylinders to control the raising and lowering of the valve plate to achieve valve opening and closing control. However, traditional pneumatic valves can only achieve full opening and full closing in opening and closing control, and cannot achieve arbitrary opening degree adjustment, nor can they achieve valve flow control, which needs to be improved. Summary of the Invention

[0004] The purpose of this invention is to provide a pneumatic valve positioner to solve the problems mentioned in the background art.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] A pneumatic valve positioner includes a valve body, a cylinder frame, a valve stem, an upper positioning block, and a lower positioning block. The cylinder frame is located at the top of the valve body. A support arm is movably mounted inside the cylinder frame. A collar is located in the middle of the support arm. An installation groove is formed on the outer side of the cylinder frame. A positioning frame is installed inside the installation groove. An inner guide groove is provided inside the positioning frame. The upper positioning block and the lower positioning block are movably mounted inside the inner guide groove.

[0007] In the aforementioned pneumatic valve positioner, a guide rail groove is provided on the inner side of the cylinder frame, and one end of the upper positioning block and one end of the lower positioning block are placed inside the guide rail groove.

[0008] In the aforementioned pneumatic valve positioner, both ends of the support arm are connected to support sliders, which are slidably connected inside the guide rail groove.

[0009] In the aforementioned pneumatic valve positioner, one end of the upper positioning block and one end of the lower positioning block are both connected to an outer support plate. The outer support plate is fixed to the surface of the positioning frame, and the surface of the positioning frame is provided with an indicator scale.

[0010] In the aforementioned pneumatic valve positioner, the top and bottom of the positioning frame are provided with side clamping arms, and a locking screw is threaded on the outer side of the side clamping arms. One end of the locking screw is threaded into a locking hole opened on the outer surface of the cylinder frame.

[0011] In the aforementioned pneumatic valve positioner, a valve cylinder is mounted on the top of the cylinder frame, and a valve stem is connected to the output end of the valve cylinder. The middle part of the valve stem is fixed inside the collar, and a locking bolt is provided on the outer side of the collar.

[0012] Compared with the prior art, the advantages of this pneumatic valve positioner are as follows:

[0013] This application installs a positioning frame on the outside of the cylinder frame of the valve body. The positioning frame has two adjustable upper and lower positioning blocks inside. The cylinder frame is equipped with a support arm and a collar for fixing the valve stem. After the positioning frame is installed, the upper and lower positioning blocks on its inner side can be inserted into the guide rail groove. When the support slider on the side of the support arm slides in the guide rail groove, the top and bottom can be limited by the upper and lower positioning blocks, thereby limiting the valve stem and valve. The entire limiting mechanism is simple and efficient, and the positioning position can be easily adjusted. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a pneumatic valve positioner according to this utility model.

[0015] Figure 2 This is a schematic diagram of the cylinder frame structure of a pneumatic valve positioner according to this utility model.

[0016] Figure 3 This is a schematic diagram of the positioning frame structure of a pneumatic valve positioner according to this utility model.

[0017] In the diagram, 1. Valve body; 2. Cylinder frame; 3. Valve cylinder; 4. Valve stem; 5. Guide rail groove; 6. Support slider; 7. Upper positioning block; 8. Support arm; 9. Collar; 10. Mounting groove; 11. Positioning frame; 12. Side clamping arm; 13. Outer support plate; 14. Inner guide groove; 15. Locking screw; 16. Lower positioning block. Detailed Implementation

[0018] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0019] A pneumatic valve positioner includes a valve body 1, a cylinder frame 2, a valve stem 4, an upper positioning block 7, and a lower positioning block 16. The cylinder frame 2 is located at the top of the valve body 1. A support arm 8 is movably arranged inside the cylinder frame 2. A collar 9 is provided in the middle of the support arm 8. An installation groove 10 is opened on the outer side of the cylinder frame 2. A positioning frame 11 is installed inside the installation groove 10. An inner guide groove 14 is provided inside the positioning frame 11. The upper positioning block 7 and the lower positioning block 16 are movably arranged inside the inner guide groove 14.

[0020] like Figure 1 , Figure 2 and Figure 3 As shown, this utility model provides a pneumatic valve positioner. Specifically, a guide rail groove 5 is provided on the inner side of the cylinder frame 2, and one end of the upper positioning block 7 and one end of the lower positioning block 16 are placed inside the guide rail groove 5.

[0021] like Figure 1 , Figure 2 and Figure 3 As shown, this utility model discloses a pneumatic valve positioner. Specifically, both ends of the support arm 8 are connected to support sliders 6, which are slidably connected inside the guide rail groove 5.

[0022] like Figure 1 , Figure 2 and Figure 3 As shown, this utility model provides a pneumatic valve positioner. Specifically, one end of the upper positioning block 7 and one end of the lower positioning block 16 are both connected to an outer support plate 13. The outer support plate 13 is fixed to the surface of the positioning frame 11, and the surface of the positioning frame 11 is provided with an indicator scale.

[0023] like Figure 1 , Figure 2 and Figure 3 As shown, this utility model discloses a pneumatic valve positioner. Specifically, the top and bottom of the positioning frame 11 are provided with side clamping arms 12, and the outer side of the side clamping arms 12 is threaded with a locking screw 15. One end of the locking screw 15 is threaded into the locking hole opened on the outer surface of the cylinder frame 2.

[0024] like Figure 1 , Figure 2 and Figure 3 As shown, this utility model discloses a pneumatic valve positioner. Specifically, a valve cylinder 3 is installed on the top of the cylinder frame 2, and a valve stem 4 is connected to the output end of the valve cylinder 3. The middle part of the valve stem 4 is fixed inside the collar 9, and a locking bolt is provided on the outer side of the collar 9.

[0025] This utility model discloses a pneumatic valve positioner. A positioning frame 11 is installed on the outside of the cylinder frame 2 of the valve body 1. The positioning frame 11 has two adjustable upper positioning blocks 7 and lower positioning blocks 16 inside. The cylinder frame 2 has a support arm 8 and a collar 9 for fixing the valve stem 4. The valve stem 4 passes through the collar 9, is fixed by locking bolts, and then enters the valve body 1 to connect with the valve seat inside the valve body 1.

[0026] After the positioning frame 11 of this application is installed, the upper positioning block 7 and the lower positioning block 16 on its inner side can penetrate into the interior of the guide rail groove 5. Thus, when the support slider 6 on the side of the support arm 8 slides inside the guide rail groove 5, its top and bottom can be limited by the upper positioning block 7 and the lower positioning block 16, thereby limiting the movable stroke of the valve stem 4. The entire limiting mechanism is simple and efficient, and the positions of the upper positioning block 7 and the lower positioning block 16 can be easily adjusted to adjust the positioning position.

[0027] Contents not described in detail herein are existing technologies known to those skilled in the art. The specific embodiments described herein are merely illustrative examples illustrating the spirit of this invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this invention or exceeding the scope defined by the appended claims.

Claims

1. A pneumatic valve positioner comprising a valve body (1), a cylinder frame (2), a valve stem (4), an upper positioning block (7) and a lower positioning block (16), characterized in that, A cylinder frame (2) is provided at the top of the valve body (1). A support arm (8) is movably provided inside the cylinder frame (2). A collar (9) is provided in the middle of the support arm (8). An installation groove (10) is provided on the outer side of the cylinder frame (2). A positioning frame (11) is installed inside the installation groove (10). An inner guide groove (14) is provided inside the positioning frame (11). An upper positioning block (7) and a lower positioning block (16) are movably provided inside the inner guide groove (14).

2. A pneumatic valve positioner according to claim 1, characterized in that The cylinder frame (2) has a guide rail groove (5) on its inner side, and one end of the upper positioning block (7) and one end of the lower positioning block (16) are placed inside the guide rail groove (5).

3. A pneumatic valve positioner according to claim 2, wherein, Both ends of the support arm (8) are connected to support sliders (6), which are slidably connected inside the guide rail groove (5).

4. A pneumatic valve positioner according to claim 1, wherein One end of the upper positioning block (7) and one end of the lower positioning block (16) are connected to an outer support plate (13). The outer support plate (13) is fixed on the surface of the positioning frame (11). The surface of the positioning frame (11) is provided with an indicator scale.

5. A pneumatic valve positioner according to claim 1, wherein, The positioning frame (11) is provided with side clamping arms (12) at the top and bottom. The side clamping arms (12) are threaded with locking screws (15) on the outer side. One end of the locking screws (15) is threaded into the locking hole opened on the outer surface of the cylinder frame (2).

6. A pneumatic valve positioner according to claim 5, wherein, A valve cylinder (3) is installed on the top of the cylinder frame (2). A valve stem (4) is connected to the output end of the valve cylinder (3). The middle part of the valve stem (4) is fixed inside the collar (9). A locking bolt is provided on the outside of the collar (9).

Images