Butterfly valve

Abstract

The utility model relates to the technical field of valves, and discloses a butterfly valve which comprises a valve body capable of being spliced, a rotatable valve plate is arranged in the valve body through a valve shaft, a sealing gasket matched with the outer side wall of the valve plate is embedded in the valve body, through holes are oppositely formed in the sealing gasket, and mounting grooves corresponding to the through holes are formed in the valve body. The outer side wall of the valve plate is oppositely provided with mounting holes for the valve shaft to extend into, the outer side wall of the valve plate is further provided with an assembling groove opposite to the mounting groove, a shaft sleeve arranged outside the valve shaft in a sleeving mode is arranged in the mounting groove, and one end of the shaft sleeve extends into the corresponding assembling groove; a valve seat is arranged at the upper end of the valve body, one end of the valve shaft penetrates through the valve seat to extend out, a rotating disc is arranged at the extending end of the valve shaft, a shifting rod penetrating through the valve shaft is further arranged at the extending end of the valve shaft, and the shifting rod is adjustably arranged. By means of the structure, the shaft sleeve is embedded between the mounting groove and the assembling groove which are opposite, the sealing performance of the position where the valve shaft penetrates through the sealing gasket can be improved, leakage at the position of the through hole is well avoided, and the sealing effect of the butterfly valve is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a butterfly valve. Background Art

[0002] A butterfly valve, also known as a flap valve, is a regulating valve with a simple structure. It can be used for on-off control of low-pressure pipeline media. A butterfly valve refers to a valve whose closing member (valve disc or butterfly plate) is a disc that rotates around the valve axis to achieve opening and closing.

[0003] At present, butterfly valves use rubber gaskets to seal around the valve plate in the valve body. The valve shaft passes through the gasket. The rotation of the valve shaft causes friction between the valve plate and the gasket surface. After long-term use, the gasket is prone to offset, resulting in a gap where the valve shaft passes through the gasket, thereby affecting the sealing of the butterfly valve. Summary of the Invention

[0004] The purpose of the present utility model is to provide a butterfly valve to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A butterfly valve comprises a valve body, a rotatable valve plate is provided in the valve body through the valve shaft, the valve body can be spliced, a sealing gasket is embedded in the valve body and matches the outer wall of the valve plate, a through hole is relatively provided on the sealing gasket for the corresponding valve shaft to pass through, a mounting groove is provided on the corresponding through hole of the valve body, a mounting hole is relatively provided on the outer wall of the valve plate for the valve shaft to extend into, an assembly groove opposite to the mounting groove is also provided on the outer wall of the valve plate, a shaft sleeve is provided in the mounting groove and is sleeved on the outside of the valve shaft, and one end of the shaft sleeve extends into the corresponding assembly groove; a valve seat is provided at the upper end of the valve body, one end of the valve shaft extends through the valve seat, a turntable is provided at the protruding end of the valve shaft, and a shift rod which passes through the valve shaft is also provided at the protruding end of the valve shaft, and the shift rod can be adjusted.

[0007] Furthermore, the outer side wall of the sealing gasket is concave inwardly along its circumference to form a concave groove, and the inner side wall of the valve body is provided with a convex ring block that can be inserted into the concave groove along its circumference.

[0008] Furthermore, the valve body includes an upper valve body and a lower valve body, the valve seat is arranged on the outer side wall of the upper valve body, and mounting parts are provided at opposite ends of the upper valve body and the lower valve body, and the corresponding mounting parts are connected by bolts.

[0009] Furthermore, the valve shaft is provided with a socket for the lever to pass through, the side wall of the valve shaft outside the valve seat is provided with a retractable positioning pin, and the outer side wall of the lever is provided with multiple positioning holes for the positioning pin to extend into.

[0010] Furthermore, the positioning pin includes a positioning cylinder arranged on the outer side wall of the valve shaft, a mounting cavity opening outward is provided in the positioning cylinder, a blocking ring is provided at the opening of the mounting cavity, a retractable positioning rod is provided in the mounting cavity, one end of the positioning rod extends into the socket, and the other end passes through the blocking ring and extends out, a retaining ring sliding in the mounting cavity is sleeved on the positioning rod, and a spring for pushing the retaining ring to drive the positioning rod into the corresponding positioning hole is sleeved on the positioning rod located in the mounting cavity.

[0011] Furthermore, a sliding groove is provided on the outer side wall of the positioning rod along its axial direction, and a sliding block is provided on the side wall of the insertion hole and slides in the sliding groove.

[0012] Furthermore, both ends of the lever are fixedly connected with handles.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. The utility model, through the arrangement of the mounting groove, the assembly groove, the through hole and the shaft sleeve, enables the shaft sleeve to be embedded between the relative mounting groove and the assembly groove, thereby improving the sealing performance of the valve shaft passing through the sealing gasket, better avoiding leakage at the through hole, and improving the sealing effect of the butterfly valve.

[0015] The utility model is convenient for assembling the butterfly valve through the splicing arrangement between the upper valve body and the lower valve body.

[0016] The utility model adjusts the extension length of one side of the lever by moving the lever in the insertion hole, so that the operator can drive the valve shaft to rotate by utilizing the lever principle to realize the opening and closing of the butterfly valve, which is convenient for practical use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural diagram of a butterfly valve in the present utility model.

[0018] Figure 2 It is a cross-sectional schematic diagram of the butterfly valve in the present utility model.

[0019] Figure 3 It is a structural schematic diagram of the valve body in this utility model.

[0020] Figure 4 It is a structural schematic diagram of the sealing gasket in the utility model.

[0021] Figure 5 It is a structural schematic diagram of the shift lever in the utility model.

[0022] Figure 6 for Figure 2 Schematic diagram of the structure of part A.

[0023] 1. The meanings of the numbers in the figure are as follows: 100, valve body; 101, annular portion; 102, tube body portion; 110, valve plate; 120, sealing gasket; 130, valve shaft; 131, turntable; 140, lever; 150, valve seat; 160, gland; 201, mounting groove; 221, mounting hole; 222, assembly groove; 230, sleeve; 240, sealing ring portion; 301, convex ring block; 302, mounting portion; 310, upper valve body; 320, lower valve body; 401, through hole; 402, recessed groove; 501, positioning hole; 502, slide groove; 503, handle; 610, positioning cylinder; 611, mounting cavity; 620, blocking ring; 630, positioning rod; 631, retaining ring; 640, spring. DETAILED DESCRIPTION

[0024] In order to further understand the content of the present invention, the present invention is described in detail with reference to the accompanying drawings and embodiments. It should be understood that the embodiments are merely for explanation of the present invention and are not intended to limit the present invention.

[0025] The following is combined with Figures 1-6 This embodiment is described in further detail.

[0026] like Figure 1-3 As shown, a butterfly valve in this embodiment includes a valve body 100, a rotatable valve plate 110 is provided in the valve body 100 through a valve shaft 130, the valve body 100 can be spliced, a sealing gasket 120 is embedded in the valve body 100 and matched with the outer wall of the valve plate 110, the sealing gasket 120 is provided with a through hole 401 for the corresponding valve shaft 130 to pass through, the valve body 100 is provided with a mounting groove 201 corresponding to the through hole 401, and the outer wall of the valve plate 110 is provided with a mounting hole 22 for the valve shaft 130 to extend into. 1. The outer wall of the valve plate 110 is further provided with an assembly groove 222 opposite to the installation groove 201. A shaft sleeve 230 is provided in the installation groove 201 and is sleeved on the outside of the valve shaft 130. One end of the shaft sleeve 230 extends into the corresponding assembly groove 222. A valve seat 150 is provided at the upper end of the valve body 100. One end of the valve shaft 130 extends through the valve seat 150. A turntable 131 is provided at the extended end of the valve shaft 130. A shift lever 140 is also provided at the extended end of the valve shaft 130 and extends through the valve shaft 130. The shift lever 140 is adjustable.

[0027] In this embodiment, the valve body 100 includes a circular ring portion 101 and a tube portion 102 arranged on the outer side of the circular ring portion 101 along its axial direction. The valve seat 150 is installed on the upper end of the tube portion 102 along the axial direction of the valve body 100. Specifically, Figure 2As shown, two valve shafts 130 are relatively provided, and mounting holes 221 are relatively provided on the outer side wall of the valve plate 110. One end of the valve shaft 130 extends into the corresponding mounting hole 221 and cooperates with the keyway between the mounting holes 221. The other end of the valve shaft 130 extends into the corresponding tube body 102. As a result, the rotation of the valve shaft 130 can drive the valve plate 110 to rotate in the valve body 100 to control the opening and closing of the butterfly valve.

[0028] The valve shaft 130 at the top extends through the valve seat 150, and the rotary disk 131 is fixedly mounted on the protruding end of the valve shaft 130. Thus, in actual use, the operator can drive the valve shaft 130 to rotate by turning the rotary disk 131 to open and close the butterfly valve.

[0029] The sealing gasket 120 is fixed to the inner wall of the valve body 100. When the valve plate 110 rotates so that its outer wall presses the sealing gasket 120, the sealing performance of the butterfly valve can be improved.

[0030] The mounting groove 201 is arranged axially along the valve body 100 and extends into the corresponding tube body portion 102. The assembly groove 222 is coaxially arranged with the corresponding mounting hole 221, and its aperture is larger than the aperture of the mounting hole 221. At the same time, the assembly groove 222 is opposite to the corresponding through hole 401 and the mounting groove 201. As a result, the shaft sleeve 230 embedded in the mounting groove 201 can pass through the corresponding through hole 401 and extend into the corresponding assembly groove 222. In this way, the shaft sleeve 230 can be installed better to prevent the valve shaft 130 from shaking.

[0031] Specifically, the mounting groove 201 located at the top is provided through the corresponding tube body portion 102. A step groove is provided coaxially with the mounting groove 201 at the center position of the upper end surface of the valve seat 150. The step groove is used to communicate with the mounting groove 201. A gland 160 is installed in the step groove. The gland 160 is used to limit the shaft sleeve 230 and install it in the corresponding mounting groove 201, so that the shaft sleeve 230 is stably installed.

[0032] Specifically, the through hole 401 protrudes outward from the open end toward the valve plate 110 to form a sealing ring portion 240. The sealing ring portion 240 is sleeved on the corresponding valve shaft 130 and is embedded in the corresponding assembly groove 222. As a result, the sealing ring portion 240 can improve the sealing performance of the connection between the shaft sleeve 230, the sealing gasket 120 and the valve plate 110, and preferably avoid leakage at the matching portion of the three, thereby improving the sealing effect of the butterfly valve.

[0033] Specifically, in order to better realize the assembly of the butterfly valve, in this embodiment, the valve body 100 can be spliced.

[0034] In this embodiment, the lever 140 is provided through the valve shaft 130, so that when the rotary disk 131 cannot be rotated to drive the valve shaft 130 to rotate and open and close the butterfly valve, the lever 140 is moved so that the middle position of the lever 140 is at the position where the valve shaft 130 is passed through. At this time, the operator drives the valve shaft 130 to rotate by holding the two ends of the lever 140 with both hands, so that the purpose of driving the butterfly valve to open and close is achieved under the action of the lever principle; of course, the lever 140 can be moved toward the side of the valve shaft 130 to adjust the extended length of the lever 140. At this time, by holding this end of the lever 140, the valve shaft 130 is pushed to rotate, thereby controlling the opening and closing of the butterfly valve. This operation can be more labor-saving and convenient for the actual use of the butterfly valve.

[0035] In actual use, combined with Figure 5 As shown, in order to facilitate the operator to move the lever 140 to open and close the butterfly valve, handles 503 are fixedly connected to both ends of the lever 140.

[0036] Combine Figure 4 As shown, in this embodiment, the outer wall of the sealing gasket 120 is concave along its circumference to form a concave groove 402, and the inner wall of the valve body 100 is provided with a convex ring block 301 that can be inserted into the concave groove 402 along its circumference.

[0037] In this embodiment, the convex ring block 301 is integrally formed on the inner wall of the valve body 100, so that the convex ring block 301 is inserted into the concave groove 402, which can better realize the installation of the sealing gasket 120 in the valve body 100;

[0038] In actual use, in order to facilitate the installation of the sealing gasket 120, the valve plate 110 and the valve shaft 130 in the valve body 100, in this embodiment, the valve body 100 includes an upper valve body 310 and a lower valve body 320, and the valve seat 150 is arranged on the outer wall of the upper valve body 310, and mounting parts 302 are provided at the opposite ends of the upper valve body 310 and the lower valve body 320, and the corresponding mounting parts 302 are connected by bolts.

[0039] By connecting the corresponding mounting portions 302 with bolts, the upper valve body 310 and the lower valve body 320 can be preferably connected, thereby preferably achieving the splicing of the valve bodies 100 so as to assemble the butterfly valve.

[0040] Combine Figure 5 As shown, in this embodiment, the valve shaft 130 is provided with a socket for the lever 140 to pass through, the side wall of the valve shaft 130 located outside the valve seat 150 is provided with a retractable positioning pin, and the outer side wall of the lever 140 is provided with a plurality of positioning holes 501 for the positioning pin to extend into.

[0041] In this embodiment, by setting the positioning pin and the positioning hole 501, the positioning pin is inserted into the positioning hole 501, which can fix the lever 140 passing through the insertion hole, so that its position relative to the valve shaft 130 is fixed, and it is easy to move it to drive the valve shaft 130 to rotate; by the telescopic setting of the positioning pin, it can be separated from the positioning hole 501, thereby enabling the lever 140 to move in the insertion hole and adjust the extension length of one end thereof for use;

[0042] Specifically, there are multiple positioning holes 501 in this embodiment, one of which is located in the middle of the lever 140, and the rest are distributed at both ends of the lever 140. As a result, the positioning pin extends into the positioning holes 501 at different positions, so that the lever 140 has different usage states.

[0043] Combine Figure 5 and Figure 6 As shown, in this embodiment, the positioning pin includes a positioning cylinder 610 arranged on the outer wall of the valve shaft 130, and the positioning cylinder 610 is provided with an installation cavity 611 opening outward, and the opening of the installation cavity 611 is provided with a blocking ring 620, and the installation cavity 611 is provided with a retractable positioning rod 630, one end of the positioning rod 630 extends into the socket, and the other end extends through the blocking ring 620, and the positioning rod 630 is provided with a blocking ring 631 sliding in the installation cavity 611, and the positioning rod 630 located in the installation cavity 611 is provided with a spring 640 for pushing the blocking ring 631 to drive the positioning rod 630 to extend into the corresponding positioning hole 501.

[0044] With the structure of this embodiment, the spring 640 pushes the retaining ring 631 toward the mounting cavity 611, driving one end of the positioning rod 630 to extend into the insertion hole and remain inserted into the corresponding positioning hole 501, thereby securing the lever 140. When the other end of the positioning rod 630 is pulled outward, the positioning rod 630 is retracted into the mounting cavity 611, disengaging the positioning hole 501, thereby releasing the fixation of the lever 140 and allowing the lever 140 to move within the insertion hole.

[0045] In the present invention, a rubber sealing ring is provided on the top of the shaft sleeve, and the rubber sealing ring is sleeved on the valve shaft. The bottom of the gland 160 presses the rubber sealing ring, thereby pressing the valve shaft.

[0046] Specifically, in order to ensure that the positioning hole 501 and one end of the positioning rod 630 correspond to each other, so that one end of the positioning rod 630 extends into the positioning hole 501, in this embodiment, a sliding groove 502 is provided on the outer wall of the positioning rod 630 along its axial direction, and a slider sliding in the sliding groove 502 is provided on the side wall of the socket. The positioning rod 630 is restricted by the coordinated setting of the sliding groove 502 and the slider, so that it cannot rotate circumferentially.

[0047] Working principle: The butterfly valve can be opened and closed by rotating the valve shaft 130 to drive the valve plate 110 to rotate in the valve body 100. The shaft sleeve 230 is embedded in the relative mounting groove 201 and the assembly groove 222, and the valve shaft 130 can be sealed at the point where it passes through the sealing gasket 120 to improve the sealing performance of the butterfly valve. When the turntable 131 cannot drive the valve shaft 130 to rotate to open and close the butterfly valve, the positioning rod 630 is pulled outward to disengage it from the positioning hole 501, so that the lever 140 moves in the jack, and the extension distance of one side of the lever 140 is adjusted. When it is extended to the appropriate length, the positioning rod 630 is extended into the corresponding positioning hole 501 to fix the lever 140. At this time, the lever 140 is driven to rotate the valve shaft 130, so that the opening and closing of the butterfly valve can be better achieved.

[0048] In short, the above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made according to the scope of the patent application of the present invention should fall within the scope of the present invention patent.

Claims

1. A butterfly valve, comprising a valve body (100), wherein a rotatable valve plate (110) is provided in the valve body (100) via a valve shaft (130), characterized in that: The valve body (100) can be spliced ​​and arranged. A sealing gasket (120) is embedded in the valve body (100) and matches the outer wall of the valve plate (110). A through hole (401) for the corresponding valve shaft (130) to pass through is provided on the sealing gasket (120). A mounting groove (201) is provided on the valve body (100) corresponding to the through hole (401). A mounting hole (221) for the valve shaft (130) to extend into is provided on the outer wall of the valve plate (110). The outer wall of the valve plate (110) is also provided with a mounting groove (201) corresponding to the mounting groove (201). The mounting groove (222) is provided with a shaft sleeve (230) which is sleeved on the outside of the valve shaft (130), and one end of the shaft sleeve (230) extends into the corresponding mounting groove (222); a valve seat (150) is provided at the upper end of the valve body (100), one end of the valve shaft (130) extends through the valve seat (150), a rotating disk (131) is provided at the extended end of the valve shaft (130), and a shift rod (140) which extends through the valve shaft (130) is further provided at the extended end of the valve shaft (130), and the shift rod (140) is adjustable.

2. A butterfly valve according to claim 1, characterized in that: The outer side wall of the sealing gasket (120) is concave inwardly along its circumference to form a concave groove (402), and the inner side wall of the valve body (100) is provided with a convex ring block (301) that can be inserted into the concave groove (402) along its circumference.

3. The butterfly valve according to claim 1, characterized in that: The valve body (100) comprises an upper valve body (310) and a lower valve body (320), the valve seat (150) is arranged on the outer side wall of the upper valve body (310), and mounting portions (302) are provided at opposite ends of the upper valve body (310) and the lower valve body (320), and the corresponding mounting portions (302) are connected by bolts.

4. The butterfly valve according to claim 1, characterized in that: The valve shaft (130) is provided with a socket for the lever (140) to pass through, a retractable positioning pin is provided on the side wall of the valve shaft (130) outside the valve seat (150), and a plurality of positioning holes (501) for the positioning pins to extend into are provided on the outer side wall of the lever (140).

5. A butterfly valve according to claim 4, characterized in that: The positioning pin comprises a positioning cylinder (610) provided on the outer wall of the valve shaft (130), a mounting cavity (611) with an opening facing outward provided in the positioning cylinder (610), a blocking ring (620) provided at the opening of the mounting cavity (611), a retractable positioning rod (630) provided in the mounting cavity (611), one end of the positioning rod (630) extending into the jack, and the other end extending through the blocking ring (620), a retaining ring (631) sliding in the mounting cavity (611) sleeved on the positioning rod (630), and a spring (640) for pushing the retaining ring (631) to drive the positioning rod (630) to extend into the corresponding positioning hole (501) sleeved on the positioning rod (630) located in the mounting cavity (611).

6. The butterfly valve according to claim 4, characterized in that: A sliding groove (502) is provided on the outer side wall of the positioning rod (630) along its axial direction, and a sliding block is provided on the side wall of the insertion hole and slides in the sliding groove (502).

7. The butterfly valve according to claim 1, characterized in that: Both ends of the shifting rod (140) are fixedly connected with a grip (503).

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