All-metal sealing manual corrugated pipe regulating valve with locking mechanism

Abstract

The utility model relates to an all-metal sealing manual corrugated pipe regulating valve with a locking mechanism, which comprises a valve body and a valve core arranged in the valve body. A plurality of rotationally symmetrical positioning rods are arranged at the lower end of the valve core; the positioning rod is always inserted into an outlet hole of the input channel; a U-shaped through groove with a downward opening is formed between every two adjacent positioning rods; when the valve element is gradually opened, the area of the through groove is gradually increased. Through the arrangement of the through groove, the flow area of the joint of the channel inlet and the channel outlet is reduced, and a medium can only flow into the channel outlet through the through groove; and when the valve core is gradually opened, the flow area of the through groove is gradually increased, so that the flow of the medium is adjusted. Compared with a traditional mode that the medium flow is controlled through the opening degree of the valve element, the change amplitude of the flow area of the through groove is smaller, and therefore the flow can be controlled more accurately.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of governing valve, specifically a full metal seal manual corrugated pipe governing valve with locking mechanism. BACKGROUND

[0002] Manual valve is the control component in the fluid conveying system of pipeline, it is used for changing the section of passage and the direction of medium flow, has the functions of guiding flow, cut-off, regulation, throttling, check, shunt or overflow pressure relief.

[0003] The traditional manual governing valve includes the valve body, the valve seat and the valve core are arranged in the valve body, the valve core is connected through the valve rod, the valve rod is driven through the hand wheel, realizes that the valve core is close to or away from the valve seat.

[0004] When the valve core opens, the medium directly flows from the inlet to the outlet of the governing valve, and the flow rate is fast, so it is difficult to accurately regulate the flow. CONTENT OF UTILITY MODEL

[0005] In order to solve the technical problems in the background art, the utility model discloses a full metal seal manual corrugated pipe governing valve with locking mechanism.

[0006] The utility model provides a full metal seal manual corrugated pipe governing valve with locking mechanism, including the valve body, its inside is provided with the valve core, the valve body is provided with input channel and output channel, the outlet of input channel is connected the inlet of output channel, the outlet of output channel is provided with first sealing surface,

[0007] The lower end of the valve core is provided with the second sealing surface corresponding to the first sealing surface, by the lifting of the valve core, the first sealing surface and the second sealing surface are away or close to each other;

[0008] The lower end of the valve core is provided with a plurality of rotationally symmetrical positioning rods; the positioning rods are always inserted into the outlet hole of the input channel;

[0009] The adjacent two positioning rods form a U-shaped through groove with the opening downward between the adjacent two positioning rods;

[0010] When the valve core is gradually opened, the area of the through groove is also gradually increased, and the medium flows out from the outlet of the input channel first enters the through groove, and then enters the output channel.

[0011] The through slot is arranged to reduce the flow area at the connection between the channel inlet and the channel outlet, and the medium can only flow into the channel outlet through the through slot; when the valve core is gradually opened, the flow area of the through slot is also gradually increased, so that the flow of the medium is regulated. The beneficial effects of the above arrangement are: 1. Compared with the traditional method of controlling the flow of medium by the opening of the valve core, the flow area of the through slot changes more slowly, so the flow can be controlled more accurately; 2. The positioning rod is always inserted into the outlet hole of the input channel to guide the movement of the valve core and improve the stability of the movement of the valve core; 3. The valve seat is cancelled, so that the structure of the regulating valve is simpler, the processing technology is simpler, and the cost is reduced.

[0012] The connection structure of the valve stem and the valve core directly affects the disassembly efficiency of the valve stem and the valve core. Therefore, the further improvement is that the valve core is driven by the valve stem to open or close; the end of the valve core away from the positioning rod is provided with a first insertion hole; one end of the valve stem is provided with a second insertion hole coaxially arranged with the first insertion hole; and the pin is inserted into the first insertion hole and the second insertion hole. In this way, the valve stem and the valve core can be disassembled by inserting and pulling out the pin, which is simple and convenient to operate and has high efficiency.

[0013] The position accuracy of the valve stem and the valve core directly affects the working stability of the regulating valve. Therefore, the further improvement is that the end of the valve core connected to the valve stem is provided with a recessed positioning groove; the first insertion hole penetrates the groove wall of the positioning groove; and the valve stem is inserted into the positioning groove.

[0014] Under the combined action of machining errors and assembly errors, there is still a position error between the valve stem and the valve core, which will affect the stability of the valve stem driving the valve core to move. Therefore, the further improvement is that the end surface of the valve stem inserted into the positioning groove is a spherical surface. The spherical surface allows the valve core and the valve stem to have a certain activity space and has the advantage of self-alignment.

[0015] Since the medium is prone to leak from the valve stem packing, the further improvement is that the outer side of the part of the valve stem located in the valve body is sleeved with a bellows; the upper end of the valve body is sealingly connected with a fixing sleeve; one end of the bellows is sealingly and fixedly connected with the valve stem, and the other end is sealingly and fixedly connected with the fixing sleeve, replacing the traditional packing seal.

[0016] Since the valve stem is prone to self-rotation when moving, the position of the valve core is deviated. Therefore, the further improvement is that the upper end of the fixing sleeve is provided with a support; the support is provided with an axially arranged through hole through which the valve stem passes; the hole wall of the through hole is provided with symmetrically and linearly arranged guide grooves; a horizontally arranged guide rod is inserted into the valve stem; and the guide rod is clamped into the guide groove.

[0017] The regulating valve is generally in vibration during operation, which causes the hand wheel to rotate and the flow of medium to be incorrect, based on which, the further improvement is that the valve rod is driven to rotate by the hand wheel, the locking pin is arranged on the hand wheel, the valve cover is arranged on the valve body, a plurality of locking holes which are rotationally symmetrical and correspond to the locking pin are arranged on the valve cover, and the hand wheel is fixed by inserting the locking pin into the locking hole.

[0018] In order to facilitate the locking pin to be inserted and pulled out, the further design is that the axial extending limiting pipe is arranged on the hand wheel, the outer end of the limiting pipe is provided with the notch, the two ends of the notch have height difference and are smoothly transitioned, the outer end of the locking pin is connected with the radially extending handle, and the handle abuts against the end surface of the notch.

[0019] In order to avoid the locking pin from being separated from the locking hole under vibration, the further design is that the pull spring is further connected between the locking pin and the limiting pipe.

[0020] Further, the other end of the valve rod is threadedly connected with the driving nut, the driving nut is inserted into the valve cover and can be freely rotated, the hand wheel is fixedly connected with the driving nut, and the driving nut and the valve rod are connected with the axially extending stroke rod for indicating the moving distance of the valve rod, so that the worker can more accurately control the stroke opening of the valve and the flow is accurately adjusted.

[0021] The beneficial effects of the utility model are: 1. the through groove is relative to the traditional through valve core's opening control medium flow, and the flow area change range of the through groove is smaller, so that the flow can be more accurately controlled; 2. the positioning rod is always inserted into the outlet hole of the input channel, realizes the valve core movement guide, improves the stability of the valve core movement; 3. the valve seat is cancelled, so that the structure of the regulating valve is more simple, and the processing technology is also more simple, thereby reducing the cost. ACCURATELY ADJUSTING FLOW OF REGULATING VALVE

[0022] The utility model is further described below in combination with the drawings and embodiments.

[0023] Figure 1 It is the structure schematic diagram of the utility model;

[0024] Figure 2 It is Figure 1 the enlarged view of A in the figure;

[0025] Figure 3 It is the front view of the utility model;

[0026] Figure 4 It is Figure 3 the enlarged view of B in the figure;

[0027] Figure 5 It is the structure schematic diagram of the support;

[0028] Figure 6is the sectional view of the locking pin;

[0029] Figure 7 is the structural schematic view of the limiting tube;

[0030] Figure 8 is the structural schematic view of the valve core;

[0031] Figure 9 is the structural schematic view before the pin is inserted;

[0032] In the figure: 1, valve body; 2, valve core; 3, input channel; 4, output channel; 5, first sealing surface; 6, second sealing surface; 7, positioning rod; 8, through slot; 9, valve rod; 10, first insertion hole; 11, second insertion hole; 12, positioning groove; 13, bellows; 14, support; 15, through hole; 16, guide slot; 17, guide rod; 18, hand wheel; 19, locking pin; 20, valve cover; 21, locking hole; 22, limiting tube; 23, notch; 24, handle; 25, tension spring; 26, drive nut; 27, stroke rod; 28, connecting flange; 29, fixed flange; 30, expansion hole; 31, circular ring; 32, upper limiting plate; 33, lower limiting plate; 34, recess; 35, baffle; 36, pin; 37, fixed sleeve. DETAILED DESCRIPTION

[0033] The utility model will be further explained in detail in combination with the drawings. These drawings are all simplified schematic views, and only schematically show the basic structure of the utility model, so they only show the structure related to the utility model.

[0034] As shown in Figure 1 and Figure 3 The utility model discloses a full metal sealed manual bellows regulating valve with locking mechanism, including valve body 1, the upper end of valve body 1 is provided with the horizontally arranged connecting flange 28, and the lower end is provided with input channel 3 and output channel 4 respectively on both sides. The outlet of input channel 3 is connected to the inlet of output channel 4, and medium enters from input channel 3 and flows out from output channel 4.

[0035] Valve body 1 is provided with valve core 2, and the outlet of output channel 4 is provided with the first sealing surface 5 arranged obliquely. The lower end of valve core 2 is provided with the second sealing surface 6 corresponding to the first sealing surface 5. When the first sealing surface 5 and the second sealing surface 6 are attached, the input channel 3 and the output channel 4 are disconnected. When the first sealing surface 5 and the second sealing surface 6 are separated, the input channel 3 and the output channel 4 are communicated. The first sealing surface 5 and the second sealing surface 6 are hardened to realize metal sealing.

[0036] The upper end of the inner wall of connecting flange 28 is provided with a recess, and fixed sleeve 37 with downward opening abuts against the recess, and the roughness of the connecting part is below 0.8, realizing mirror surface sealing.

[0037] The upper end of the fixing sleeve 37 is provided with a support 14, and the lower end surface of the support 14 is provided with an annular clamping groove, the outer groove wall of the clamping groove is fitted with the outer wall of the fixing cylinder, the inner groove wall of the clamping groove is fitted with the inner wall of the fixing cylinder, and clamping is achieved.

[0038] As shown in Figure 5 The support 14 is provided with an axially arranged through hole 15, and the valve rod 9 passes through the through hole 15. Symmetrically and linearly arranged guide grooves 16 are arranged on the hole wall of the through hole 15; a horizontally arranged guide rod 17 is inserted into the valve rod 9; the guide rod 17 is clamped in the guide groove 16 and can move up and down in the guide groove 16. The arrangement of the guide rod 17 and the guide groove 16 is used for positioning the valve rod 9 to avoid self-rotation of the valve rod 9.

[0039] The upper end of the support 14 is provided with a valve cover 20, the lower end of the valve cover 20 is provided with a fixing flange 29, the lower end surface of the fixing flange 29 is provided with a recessed clamping table, and the upper end of the support 14 is clamped in the clamping table to achieve installation and positioning. The fixing flange 29 and the connecting flange 28 are locked and fixed by bolts and nuts, so that the fixing sleeve 37 and the support 14 are fixed under the action of the fixing flange 29 and the connecting flange 28.

[0040] The upper end of the valve core 2 is provided with a horizontally penetrating first insertion hole 10; the lower end of the valve rod 9 is provided with a second insertion hole 11 coaxially arranged with the first insertion hole 10; and the pin 36 is inserted into the first insertion hole 10 and the second insertion hole 11. In this way, the valve rod 9 and the valve core 2 can be disassembled by inserting and pulling out the pin 36, which is simple and convenient to operate and has high efficiency.

[0041] The two ends of the first insertion hole 10 are provided with outer chamfers, as shown in Figure 9 The initial state of the pin 36 is a standard cylinder, and the two ends thereof are provided with expansion holes 30. When the pin 36 is inserted into the first insertion hole 10 and the second insertion hole 11, a tapered drive shaft is inserted into the expansion hole 30, as shown in Figure 4 The two ends of the pin 36 are deformed into a horn structure and are fitted with the outer chamfers. In this way, the position of the pin 36 is more stable and is not easy to fall off.

[0042] The upper end surface of the valve core 2 is also provided with a recessed positioning groove 12; the first insertion hole 10 penetrates the groove wall of the positioning groove 12; and the lower end of the valve rod 9 is inserted into the positioning groove 12 to achieve installation and positioning. The lower end surface of the valve rod 9 is a spherical surface, so that the valve core 2 and the valve rod 9 have a certain movement space and have the advantage of self-alignment.

[0043] The lower end of the valve stem 9 is provided with a radial protruding ring 31 near the inserted positioning groove 12. The bellows 13 is sleeved on the valve stem 9, and the lower end of the bellows 13 is sealingly and fixedly connected with the ring 31 by welding, and the upper end of the bellows 13 is sealingly and fixedly connected with the support 14 by welding. In the embodiment, the bellows 13 is used for sealing instead of the traditional packing seal, so that the sealing performance is better, and medium leakage is avoided.

[0044] As shown in Figure 8 , the lower end of the valve core 2 is provided with a plurality of rotationally symmetrical positioning rods 7; the positioning rods 7 are always inserted into the outlet hole of the input channel 3; the adjacent two positioning rods 7 form a U-shaped channel 8 with the opening downward; when the valve core 2 is gradually opened, the area of the channel 8 also gradually increases, and the medium flows out from the outlet of the input channel 3 first into the channel 8, and then into the output channel 4. The valve stem 9 is also used for guiding the lifting of the valve core 2, so that the movement of the valve core 2 is more stable.

[0045] The setting of the channel 8 reduces the flow area at the connection between the channel inlet and the channel outlet, and the medium can only flow into the channel outlet through the channel 8; when the valve core 2 is gradually opened, the flow area of the channel 8 also gradually increases, so that the flow of the medium is regulated. The beneficial effects of the above setting are: 1. Compared with the traditional method of controlling the flow of the medium through the opening of the valve core 2, the flow area of the channel 8 changes smaller, so that the flow can be more accurately controlled; 2. The positioning rods 7 are always inserted into the outlet hole of the input channel 3, which realizes the movement guiding of the valve core 2 and improves the stability of the movement of the valve core 2; 3. The valve seat is cancelled, so that the structure of the regulating valve is simpler, the processing technology is simpler, and the cost is reduced.

[0046] The driving nut 26 is inserted into the valve cover 20 and arranged vertically, and is rotationally connected through a bearing. The driving nut 26 is also connected with the valve cover 20 through a sealing ring to achieve waterproof and dustproof. The upper end of the driving nut 26 is threadedly connected with the valve stem 9. The upper end of the driving nut 26 is fixed with a hand wheel 18. By rotating the hand wheel 18, the driving nut 26 is driven to rotate, thereby driving the valve stem 9 to lift, so as to realize the opening or closing of the valve core 2.

[0047] When the regulating valve works, the working condition generally vibrates, which causes the hand wheel 18 to produce autorotation, so that the flow of the medium appears error. Therefore, the locking pin 19 is arranged on the hand wheel 18, and a plurality of rotationally symmetrical locking holes 21 corresponding to the locking pin 19 are arranged on the valve cover 20; by inserting the locking pin 19 into the locking hole 21, the hand wheel 18 is fixed.

[0048] In order to facilitate the insertion and extraction of the locking pin 19, the hand wheel 18 is provided with an axially extending limiting tube 22. As shown in Figure 2 , Figure 6 and Figure 7As shown, the lower end of the limiting tube 22 is connected with a mounting plate by welding, which is fixed on the upper end of the valve cover 20 by bolts. The upper end of the limiting tube 22 is provided with a notch 23 by cutting, and the remaining part constitutes a poor arc-shaped baffle 35. The two end faces of the baffle 35 are coplanar. The two ends of the notch 23 have a height difference, and the transition is smooth; the upper end of the locking pin 19 is connected with a radially extending handle 24; the handle 24 abuts against the end face of the notch 23. The limiting plate is used for limiting the rotation of the handle 24. By sliding the handle 24 on the end face of the notch 23, the locking pin 19 can be driven to rise and fall, so as to realize the insertion or disengagement of the locking pin 19 from the locking hole 21.

[0049] The limiting tube 22 is provided with an inwardly protruding upper limiting plate 32 below the notch 23, and the locking pin 19 is inserted into the limiting plate. The lower end of the locking pin 19 inserted into the upper side of the part of the locking hole 21 is provided with a protruding lower limiting plate 33, which abuts against the inner wall of the limiting tube 22 to guide the lifting of the locking pin 19. The locking pin 19 is sleeved with a tension spring 25, the upper end of the tension spring 25 is fixedly connected with the lower end face of the upper limiting plate 32, and the lower end of the tension spring 25 is fixedly connected with the upper end face of the lower limiting plate 33. In this way, the locking pin 19 is always subjected to the tension of the tension spring 25; when the locking pin 19 is inserted into the locking hole 21, its position is more stable.

[0050] The connection between the end face of the notch 23 and the limiting plate is provided with a recessed notch 34, when the handle 24 is rotated to the two ends of the notch 23, it can be clamped in the notch 34 to realize limiting, so that the position of the handle 24 is more stable.

[0051] The drive nut 26 and the valve stem 9 are connected with an axially extending stroke rod 27, which is used for indicating the moving distance of the valve stem 9, so that the worker can more accurately control the stroke opening of the valve, and plays a role in accurately adjusting the flow.

[0052] Based on the above ideal embodiment according to the present application, through the above description, relevant personnel can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the contents in the specification, and must be determined according to the scope of claims.

Claims

1. A full metal sealed manual bellows regulating valve with locking mechanism, comprising a valve body (1) with a valve core (2) arranged inside, the valve body (1) is provided with an input channel (3) and an output channel (4); the outlet of the input channel (3) is connected to the inlet of the output channel (4), characterized in that: the outlet of the output channel (4) is provided with a first sealing surface (5); the lower end of the valve core (2) is provided with a second sealing surface (6) corresponding to the first sealing surface (5), the first sealing surface (5) and the second sealing surface (6) are away from or close to each other by lifting the valve core (2); the lower end of the valve core (2) is provided with a plurality of rotationally symmetrical positioning rods (7); the positioning rods (7) are always inserted into the outlet hole of the input channel (3); the U-shaped downward opening through groove (8) is formed between the adjacent two positioning rods (7); when the valve core (2) is gradually opened, the area of the through groove (8) also gradually increases, and the medium flows out from the outlet of the input channel (3) first enters the through groove (8), and then enters the output channel (4). The valve core (2) is driven by a valve stem (9) to realize opening or closing; the end of the valve core (2) away from the positioning rod (7) is provided with a first insertion hole (10) penetrating through; one end of the valve stem (9) is provided with a second insertion hole (11) coaxially arranged with the first insertion hole (10); the pin (36) is inserted into the first insertion hole (10) and the second insertion hole (11). The end of the valve core (2) connected to the valve stem (9) is provided with a recessed positioning groove (12); the first insertion hole (10) penetrates the groove wall of the positioning groove (12); the valve stem (9) is inserted into the positioning groove (12). The end surface of the valve stem (9) inserted into the positioning groove (12) is spherical. The outer side of the part of the valve stem (9) located in the valve body (1) is sleeved with a bellows (13); The upper end of the valve body (1) is sealingly connected with a fixing sleeve (37); 2. A full metallic sealed manual bellow trim valve with locking mechanism as claimed in claim 1 wherein: One end of the bellows (13) is sealingly connected with the valve stem (9), and the other end is sealingly connected with the fixing sleeve (37). The upper end of the valve body (1) is installed with a support (14); The support (14) is provided with an axially arranged through hole (15), and the valve stem (9) passes through the through hole (15); The hole wall of the through hole (15) is provided with symmetrically and linearly arranged guide grooves (16); 3. A full metallic sealed manual bellow trim valve with locking mechanism as claimed in claim 2 wherein: The valve stem (9) is inserted with a horizontally arranged guide rod (17); The guide rod (17) is clamped in the guide groove (16). The valve stem (9) is driven to rotate by a hand wheel (18); 4. A full metallic sealed manual bellow trim valve with locking mechanism as claimed in claim 3 wherein: The hand wheel (18) is provided with a locking pin (19); 5. A full metallic sealed manual bellow trim valve with locking mechanism as claimed in claim 2 wherein: The valve body (1) is installed with a valve cover (20); The valve cover (20) is provided with a plurality of rotationally symmetrical locking holes (21) corresponding to the locking pin (19); The locking pin (19) is inserted into the locking hole (21) to fix the hand wheel (18).

6. A full metallic sealed manual bellow trim valve with locking mechanism as claimed in claim 2 wherein: The hand wheel (18) is installed with an axially extending limiting tube (22); The outer end of the limiting tube (22) is provided with a notch (23). ​ ​ ​ 7. A full metallic sealed manual bellow trim valve with locking mechanism as claimed in claim 2 wherein: ​ ​ ​ ​ ​ 8. A full metallic sealed manual bellow trim valve with locking mechanism as claimed in claim 7 wherein: ​ ​ The two ends of the notch (23) have height difference, and smooth transition; The outer end of the locking pin (19) is connected with a radially extending handle (24); The handle (24) abuts against the end face of the notch (23).

9. A full metallic sealed manual bellow trim valve with locking mechanism as claimed in claim 8 wherein: A tension spring (25) is further connected between the locking pin (19) and the limiting tube (22).

10. A full metallic sealed manual bellow trim valve with locking mechanism as claimed in claim 7 wherein: The other end of the valve stem (9) is threadedly connected with a driving nut (26); The driving nut (26) is inserted into the valve cover (20) and can rotate freely; The hand wheel (18) is fixedly connected with the driving nut (26); An axially extending stroke rod (27) is connected between the driving nut (26) and the valve stem (9), for indicating the moving distance of the valve stem (9).

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