A hand-operated weir diaphragm valve

Abstract

The utility model relates to valve technical field especially is manual weir type diaphragm valve, the sleeve extends to the position of the threaded through -hole of the valve cover, the guide sleeve extends on the hand wheel, be equipped with the guide groove that the sleeve extends in the guide sleeve, the outer wall of sleeve is embedded and is provided with the abutment ring, when the abutran of hand wheel drive valve rod rotates the outer peripheral wall of abutment ring and the inner peripheral wall of guide groove keep abutment, the utility model discloses through the location cooperation of sleeve and guide sleeve, still be provided with abutment ring, form reliable radial direction guiding effect, prevent the hand wheel from relatively deflection with valve rod in the rotating process, ensure that the hand wheel and valve rod along the axis smooth and smooth movement.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a manual weir-type diaphragm valve. Background Technology

[0002] The weir-type diaphragm valve is a fluid control device specifically designed for conveying slurries, corrosive media, and high-purity chemicals. It is mainly used in slurry treatment processes in chemical, flue gas desulfurization, and power industries. This valve isolates the fluid from the drive components through an elastic diaphragm seal, solving the leakage problem of traditional valves. It adopts a direct-flow channel and chamberless structure design, effectively reducing slurry retention and particle accumulation.

[0003] Patent CN201772097U discloses a fire-fighting diaphragm valve, comprising a diaphragm, a valve body, and a valve cover. The flange surface connecting the valve cover and the valve body has a recessed area to accommodate the edge of the diaphragm and a weir-groove type sealing structure located around the recessed area. The weir-groove type sealing structure is filled with a fire-resistant gasket. This solves the technical problem of preventing the sides of the diaphragm from contacting the outside environment and cutting off the path for flames to enter the valve from the joint between the valve cover and the valve body.

[0004] However, further investigation revealed the following problems with the solution: the valve stem of the diaphragm valve drives the valve disc and diaphragm to move up and down under the drive of the handwheel to achieve opening and closing. The valve stem and valve cover are connected by a threaded mechanism. In manual mode, the handwheel will be deflected due to uneven force applied to it, which will cause the valve stem to feel stuck or difficult to drive. Forcing the rotation will also damage the threads. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a manual weir-type diaphragm valve. This invention uses the limiting cooperation between the sleeve and the guide sleeve and also provides an abutment ring to form a reliable radial guiding effect, preventing the handwheel from being relatively deviated from the valve stem during rotation, and ensuring that the handwheel and valve stem move smoothly and steadily along the axis.

[0006] The technical solution adopted by this utility model is as follows: A manual weir-type diaphragm valve includes a valve body, a valve cover, a valve disc, a diaphragm, a valve stem, and a handwheel. The valve cover is flanged and connected to the valve body. The diaphragm is sandwiched between the valve cover and the valve body, and the middle part of the diaphragm is connected to the valve disc. The valve disc is disposed inside the valve cover. One end of the valve stem is connected to the valve disc and the other end is connected to the handwheel. A threaded through hole is provided on the valve cover. The valve stem is threaded into the threaded through hole through an external thread. A sleeve extends from the valve cover at the position corresponding to the threaded through hole. A guide sleeve extends from the handwheel. A guide groove is provided inside the guide sleeve for the sleeve to extend into. An abutment ring is embedded in the outer wall of the sleeve. When the handwheel drives the valve stem to rotate, the outer peripheral wall of the abutment ring abuts against the inner peripheral wall of the guide groove.

[0007] The outer peripheral wall of the abutment ring is provided with a conical abutment portion.

[0008] The sleeve is fitted with an annular cap at one end, and a limiting part is provided at the end of the annular cap away from the valve cover. The abutting ring is abutted between the limiting part and the sleeve.

[0009] An elastic component is also provided between the abutment ring and the sleeve. The elastic component includes two sets of cover plates and an elastic element sandwiched between the two sets of cover plates. The two sets of cover plates are distributed along the axial direction of the sleeve, and the two ends of the elastic element are respectively embedded in a cover plate.

[0010] The annular cover has several disassembly and assembly grooves distributed circumferentially on the end face away from the valve cover.

[0011] The limiting part and the sleeve are provided with two identical abutment rings distributed along the axial direction of the sleeve, and a connecting ring is provided between the two abutment rings. The connecting ring and the two connecting rings are integrally formed.

[0012] The outer diameter of the connecting ring is smaller than the outer diameter of the abutting ring, and a support ring is also embedded between the two abutting rings. The inner peripheral wall of the support ring is in close contact with the outer peripheral wall of the connecting ring.

[0013] It also includes a fixing pin, which passes through the support ring, the connecting ring and the annular cover in sequence, and the end of the fixing pin is inserted and fixed to the sleeve.

[0014] The beneficial effects of this utility model are as follows: This utility model uses the limiting cooperation between the sleeve and the guide sleeve, and also provides an abutment ring between the two. The inner side of the abutment ring is embedded in the outer wall of the sleeve, and the outer side is in contact with the inner wall of the guide groove, forming a reliable radial guiding effect. The guide sleeve of the handwheel and the sleeve of the valve cover are kept coaxial, so the valve stem connected to the handwheel can also be coaxial, preventing the handwheel from being relatively deviated from the valve stem during rotation, ensuring that the handwheel and the valve stem move smoothly and steadily along the axis. The above-mentioned guiding structure can also effectively disperse the torque applied by the handwheel, avoid local stress concentration between the valve stem and the threaded through hole, make the valve stem rotate more smoothly, significantly reduce the jamming phenomenon and the feeling of effort during operation, and improve the comfort and efficiency of manual operation. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0016] Figure 1This is a schematic diagram of the structure of a manual weir-type diaphragm valve according to the present invention; Figure 2 for Figure 1 A magnified view of a portion of point A in the middle; In the diagram, 1-valve body, 2-valve cover, 3-valve disc, 4-diaphragm, 5-valve stem, 6-handwheel, 7-threaded through hole, 8-external thread, 9-sleeve, 10-guide sleeve, 11-guide groove, 12-abutting ring, 13-conical abutting part, 14-annular cover, 15-limiting part, 16-cover plate, 17-elastic element, 18-disassembly groove, 19-connecting ring, 20-supporting ring, 21-fixing pin. Detailed Implementation

[0017] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0018] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.

[0019] The directional and positional terms used in this utility model, such as "up," "down," "front," "back," "left," "right," "inner," "outer," "top," "bottom," and "side," are merely for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0020] like Figures 1 to 2 As shown, this is an embodiment of the present invention: a manual weir-type diaphragm valve, comprising a valve body 1, a valve cover 2, a valve disc 3, a diaphragm 4, a valve stem 5, and a handwheel 6. The valve cover 2 is flange-connected to the valve body 1. The diaphragm 4 is sandwiched between the valve cover 2 and the valve body 1, and the middle part of the diaphragm 4 is connected to the valve disc 3. The valve disc 3 is disposed inside the valve cover 2. One end of the valve stem 5 is connected to the valve disc 3, and the other end is connected to the handwheel 6. The valve cover 2 has a threaded through hole 7. The valve stem 5 is threadedly engaged with the threaded through hole 7 through an external thread 8. A sleeve 9 extends from the valve cover 2 at the position corresponding to the threaded through hole 7. A guide sleeve 10 extends from the handwheel 6. The guide sleeve 10 has a guide groove 11 for the sleeve 9 to extend into. An abutment ring 12 is embedded in the outer wall of the sleeve 9. When the handwheel 6 drives the valve stem 5 to rotate, the outer peripheral wall of the abutment ring 12 abuts against the inner peripheral wall of the guide groove 11.

[0021] The beneficial effects of this design are as follows: This utility model uses the limiting cooperation between the sleeve and the guide sleeve, and also provides an abutment ring between the two. The inner side of the abutment ring is embedded in the outer wall of the sleeve, and the outer side abuts against the inner wall of the guide groove, forming a reliable radial guiding effect. The guide sleeve of the handwheel and the sleeve of the valve cover are kept coaxial, so the valve stem connected to the handwheel can also be coaxial, preventing the handwheel from being relatively deviated from the valve stem during rotation, ensuring that the handwheel and valve stem move smoothly and steadily along the axis. The above-mentioned guiding structure can also effectively disperse the torque applied by the handwheel, avoid local stress concentration between the valve stem and the threaded through hole, make the valve stem rotate more smoothly, significantly reduce the jamming phenomenon and the feeling of effort during operation, and improve the comfort and efficiency of manual operation.

[0022] Furthermore, the outer peripheral wall of the abutment ring 12 is provided with a conical abutment portion 13.

[0023] The beneficial effects of this design are as follows: by setting the outer peripheral wall of the abutment ring as a conical abutment part, the guiding function of continuous abutment is retained, while the contact area is reduced, frictional resistance is reduced, and the smooth opening and closing of the valve is ensured.

[0024] Furthermore, the sleeve 9 is fitted with an annular cover 14 at its end, and a limiting part 15 is provided at the end of the annular cover 14 away from the valve cover 2. The abutting ring 12 is abutted between the limiting part 15 and the sleeve 9.

[0025] The beneficial effects of this design are as follows: by incorporating an annular cap with a limiting part, the abutment ring is securely sealed between the limiting part and the end of the sleeve. This structure achieves precise axial positioning and reliable fixation of the abutment ring, effectively preventing axial movement or even detachment due to friction or vibration during operation, thus ensuring the long-term stability and reliability of the guiding function. Simultaneously, this structure facilitates the assembly, maintenance, or replacement of the abutment ring, improving the product's maintainability.

[0026] Furthermore, an elastic component is provided between the abutment ring 12 and the sleeve 9. The elastic component includes two sets of cover plates 16 and an elastic element 17 sandwiched between the two sets of cover plates 16. The two sets of cover plates 16 are distributed along the axial direction of the sleeve 9, and the two ends of the elastic element 17 are respectively embedded in one of the cover plates 16.

[0027] The beneficial effects of this design are as follows: by incorporating an elastic component including a spring and a cover plate between the abutment ring and the sleeve, this structure provides a continuous axial elastic preload to the abutment ring. This design automatically compensates for the axial sway of the abutment ring, maintaining a stable abutment contact state at all times, effectively eliminating valve stem wobbling and impact caused by clearance, thereby further improving guiding accuracy and operational smoothness, and significantly extending the service life of the entire guiding mechanism. In this embodiment, the spring is a readily available spring using existing technology.

[0028] Furthermore, the annular cover 14 has several disassembly grooves 18 distributed circumferentially on the end face away from the valve cover 2.

[0029] The advantages of this design are as follows: by providing several disassembly and assembly grooves circumferentially on the end face of the annular cover, clear force points are provided for disassembly and assembly using tools. This structure effectively solves the problem of the annular cover being difficult to clamp and rotate in confined spaces, making the maintenance and replacement of the contact ring and internal elastic components simpler and more efficient, and greatly improving the maintainability of the valve.

[0030] Further, the limiting part 15 and the sleeve 9 are provided with two identical abutment rings 12 distributed along the axial direction of the sleeve 9, and a connecting ring 19 is provided between the two abutment rings 12. The connecting ring 19 and the two connecting rings 19 are integrally formed.

[0031] The beneficial effects of this design are as follows: by employing two abutment rings connected as a single unit, an extended, integrated double-guide structure is formed. This not only significantly enhances the valve stem's resistance to eccentric loading and bending during movement, further improving its motion stability, but also reduces the wear rate of a single abutment ring by distributing the force across the two rings. The one-piece molding design also simplifies the assembly process and ensures coaxiality between components, thereby extending service life while guaranteeing the accuracy and reliability of the guiding function.

[0032] Further, the outer diameter of the connecting ring 19 is smaller than the outer diameter of the abutting ring 12, and a support ring 20 is also embedded between the two abutting rings 12, with the inner peripheral wall of the support ring 20 in close contact with the outer peripheral wall of the connecting ring 19.

[0033] The beneficial effects of this design are as follows: by embedding a support ring outside the connecting ring between the two abutment rings, the structural rigidity and deformation resistance of the connecting ring are effectively enhanced. This support ring prevents the connecting ring from bending or twisting under uneven lateral forces, ensuring that the two abutment rings always remain in the correct coaxial position. This further strengthens the stability and reliability of the dual-guide structure and extends the overall service life of the entire guide assembly.

[0034] Further, a fixing pin 21 is included, which passes through the support ring 20, the connecting ring 19 and the annular cover 14 in sequence, and the end of the fixing pin 21 is inserted and fixed to the sleeve 9.

[0035] The beneficial effects of this design are as follows: the fixing pin fundamentally prevents the annular cover and the abutment ring assembly from rotating circumferentially on the sleeve, completely eliminating wear and increased operating torque caused by relative sliding of components, ensuring the axial positioning of the entire guide assembly is firm and reliable, avoiding loosening that may occur under vibration conditions, and guaranteeing the long-term stability of guiding accuracy. The abutment ring can be made of elastic material. With the cooperation of the elastic component and the fixing pin, the abutment ring is squeezed, causing the abutment ring to deform laterally and keep the conical abutment part in contact with the guide sleeve, preventing the abutment ring and the conical abutment part from separating from the guide sleeve after wear.

[0036] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A manual weir-type diaphragm valve, comprising a valve body (1), a valve cover (2), a valve disc (3), a diaphragm (4), a valve stem (5), and a handwheel (6), wherein the valve cover (2) is flange-connected to the valve body (1), the diaphragm (4) is sandwiched between the valve cover (2) and the valve body (1), and the middle part of the diaphragm (4) is connected to the valve disc (3), the valve disc (3) is disposed inside the valve cover (2), one end of the valve stem (5) is connected to the valve disc (3), and the other end is connected to the handwheel (6), a threaded through hole (7) is provided on the valve cover (2), and the valve stem (5) is threadedly engaged with the threaded through hole (7) through an external thread (8), characterized in that: The valve cover (2) has a sleeve (9) extending from the position corresponding to the threaded through hole (7). The handwheel (6) has a guide sleeve (10) extending from it. The guide sleeve (10) has a guide groove (11) for the sleeve (9) to extend into. The outer wall of the sleeve (9) is fitted with an abutment ring (12). When the handwheel (6) drives the valve stem (5) to rotate, the outer peripheral wall of the abutment ring (12) abuts against the inner peripheral wall of the guide groove (11).

2. The manual weir-type diaphragm valve according to claim 1, characterized in that: The outer peripheral wall of the abutment ring (12) is provided with a conical abutment part (13).

3. A manual weir-type diaphragm valve according to claim 1, characterized in that: The sleeve (9) is covered with an annular cover (14) at one end. The annular cover (14) is provided with a limiting part (15) at the end away from the valve cover (2). The abutting ring (12) is abutted between the limiting part (15) and the sleeve (9).

4. A manual weir-type diaphragm valve according to claim 3, characterized in that: An elastic component is also provided between the abutment ring (12) and the sleeve (9). The elastic component includes two sets of cover plates (16) and an elastic element (17) sandwiched between the two sets of cover plates (16). The two sets of cover plates (16) are distributed along the axial direction of the sleeve (9). The two ends of the elastic element (17) are respectively embedded in a cover plate (16).

5. A manual weir-type diaphragm valve according to claim 3, characterized in that: The annular cover (14) has several disassembly grooves (18) distributed circumferentially on the end face away from the valve cover (2).

6. A manual weir-type diaphragm valve according to claim 3, characterized in that: The limiting part (15) and the sleeve (9) are provided with two abutting rings (12) with the same structure along the axial direction of the sleeve (9). A connecting ring (19) is provided between the two abutting rings (12). The connecting ring (19) and the two connecting rings (19) are integrally formed.

7. A manual weir-type diaphragm valve according to claim 6, characterized in that: The outer diameter of the connecting ring (19) is smaller than the outer diameter of the abutting ring (12), and a support ring (20) is also embedded between the two abutting rings (12). The inner peripheral wall of the support ring (20) is in close contact with the outer peripheral wall of the connecting ring (19).

8. A manual weir-type diaphragm valve according to claim 7, characterized in that: It also includes a fixing pin (21), which passes through the support ring (20), the connecting ring (19) and the annular cover (14) in sequence, and the end of the fixing pin (21) is inserted and fixed to the sleeve (9).

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