A stop valve with a split disc structure

Abstract

The utility model relates to the technical field of stop valves, and specifically discloses a stop valve with a split valve disc structure, including a valve body, a valve seat, a valve stem, a valve disc body and a fitting, the valve body is sequentially provided with a first medium flow channel, a second medium flow channel and a third medium flow channel that are interconnected, the valve seat is arranged in the second medium flow channel, one end of the valve stem is inserted in the second medium flow channel and connected to the valve disc body, and the other end is connected to a driving device, and the fitting is used for detachably connecting with the valve disc body. The fitting and the valve disc body of the utility model adopt a detachable connection method, so that the valve disc structure can meet the use requirements in different media environments and enhance the service life of the stop valve; the design of the mounting part can make the fitting and the valve disc body lock, and the structure of the mounting part can also be interchangeably designed on the fitting and the valve disc body, so that it can continue to be used normally without replacing the original valve disc body, effectively reducing the operating cost.

Description

Technical Field

[0001] The utility model belongs to the technical field of stop valves, in particular to a stop valve with a valve disc split structure. Background Art

[0002] Generally, the existing stop valves only have a shut-off function, and the working pressure difference of the existing stop valves is large. There are impurities in the medium, and the sealing surface of the valve is severely eroded. The valve disc structure of the existing stop valve is generally frustum-shaped, which seriously affects the service life of the valve. At the same time, this design has a poor throttling effect when the medium flows. Therefore, it is necessary to redesign the valve disc structure of the stop valve so that it has anti-erosion and throttling functions to enhance the service life of the valve. Therefore, it is urgently necessary to design a stop valve with a valve disc split structure to solve the above problems. Utility Model Content

[0003] The utility model aims to provide a stop valve with a split valve disc structure, which solves the above-mentioned problems of severe scouring of the valve sealing surface, poor throttling effect of the existing truncated cone valve disc structure and short service life of the existing valve disc structure.

[0004] In order to solve the above technical problems, the utility model provides a stop valve with a split valve disc structure, including a valve body, a valve seat, a valve stem, a valve disc body and a matching piece, the valve body is sequentially provided with a first medium flow channel, a second medium flow channel and a third medium flow channel which are interconnected, the valve seat is arranged in the second medium flow channel, one end of the valve stem is penetrated in the second medium flow channel and is connected to the valve disc body, and the other end is connected to a driving device, and the matching piece is used for detachably connecting to the valve disc body.

[0005] Furthermore, the fitting is connected to the valve flap body via a mounting portion, and the mounting portion includes a locking boss and a locking groove.

[0006] The locking boss comprises a boss body and a locking block, wherein the boss body is fixedly arranged at the bottom of the valve flap body, and the locking block is fixedly arranged at the lower outer side of the boss body.

[0007] The locking groove includes a placement groove for accommodating the locking boss and a locking groove cooperating with the locking block. The placement groove is opened at the top of the connecting piece. The locking groove is located at the lower outer side of the placement groove, and the two are connected so that the locking block can be rotated from the placement groove into the locking groove. The inner top surface of the locking groove is provided with a blocking surface for preventing the connecting piece from falling off.

[0008] Furthermore, an anti-rotation mechanism is provided between the adapter and the valve flap body, the anti-rotation mechanism comprising an anti-rotation member and a first lock hole and a second lock hole for placing the anti-rotation member, the first lock hole being opened at the bottom of the valve flap body and located on the outside of the boss body,

[0009] The second locking hole is formed on the top of the fitting and is located outside the locking groove.

[0010] The depth of the first lock hole is not less than the height of the anti-rotation component, and the depth of the second lock hole is less than the height of the anti-rotation component.

[0011] When the locking boss is placed in the placement groove and is not locked, the first locking hole and the second locking hole are in a staggered state, and the matching component prevents the anti-rotation component from sliding into the second locking hole;

[0012] When the locking boss and the locking groove are locked, the first locking hole and the second locking hole are in a communicating state, and two ends of the anti-rotation component are respectively matched with the first locking hole and the second locking hole.

[0013] Furthermore, the number of the first locking holes and the number of the second locking holes are two respectively.

[0014] Furthermore, the fitting is a throttling piece or an anti-scour piece.

[0015] Furthermore, the throttling member is in a cone shape, and the second locking hole and the locking groove are provided on the top of the throttling member, and the locking groove is used for locking with the locking boss.

[0016] Furthermore, the anti-scour component is cylindrical, the top of the anti-scour component is provided with the second locking hole and the locking groove for locking with the locking boss, and the side wall of the anti-scour component is provided with a plurality of annular grooves.

[0017] Furthermore, the locking boss is a T-shaped boss.

[0018] Furthermore, the anti-rotation component is a pin.

[0019] Furthermore, a conical sealing surface is provided on the outer peripheral wall of the lower part of the valve flap body, and the driving device drives the valve stem to move up and down to drive the conical sealing surface of the valve flap body to fit or separate from the valve seat.

[0020] Beneficial effects of the utility model: the fitting and the valve disc body of the utility model adopt a detachable connection method, so that the valve disc structure can meet the use requirements in different media environments and enhance the service life of the stop valve;

[0021] The valve disc body and the fitting can be detachably connected through the mounting part, and the fitting can also be locked with the valve disc body. The structure of the mounting part can also be interchangeably designed, so that the original valve disc body only needs to open a lock groove and can continue to be used normally without replacement, which effectively reduces the operating cost;

[0022] When the adapter is locked with the valve flap body, an anti-rotation mechanism is added. By using the cooperation between the anti-rotation member and the first locking hole and the second locking hole, the problem of the adapter falling off from the valve flap body due to the relative rotation of the adapter and the valve flap body under the push of the fluid after the engaging block of the valve flap body extends into the engaging groove of the adapter can be avoided;

[0023] The throttling piece adopts a conical design, which can effectively control the flow of the medium in the stop valve to improve the throttling effect of the stop valve;

[0024] The anti-brush part adopts a cylindrical and annular groove design, which can effectively reduce the scouring force of the medium in the stop valve to increase the service life of the stop valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a partial cross-sectional view of the conventional structure of a valve disc body of a stop valve with a valve disc split structure in an embodiment of the utility model;

[0027] Figure 2 It is a top view of a valve stem and a valve disc body of a stop valve with a valve disc split structure in an embodiment of the utility model;

[0028] Figure 3 The valve stem and valve disc body of the embodiment of the utility model are along Figure 2 The cross-sectional view cut along the AA line in the figure;

[0029] Figure 4 The valve stem and valve disc body of the embodiment of the utility model are along Figure 2 The cross-sectional view cut along the BB line in FIG.

[0030] Figure 5 The valve flap body of the embodiment of the utility model is locked with the matching piece and the valve stem and the valve flap body are along Figure 2 Schematic diagram of the structure cut along line AA;

[0031] Figure 6The valve flap body and the fitting in the embodiment of the utility model are not locked and the valve stem and the valve flap body are along Figure 2 Schematic diagram of the structure cut along line AA;

[0032] Figure 7 It is a cross-sectional view of an anti-rotation component in an initial insertion state when the valve disc body and the matching component of a stop valve with a valve disc split structure in an embodiment of the utility model are not locked;

[0033] Figure 8 It is a cross-sectional view of the cooperation between the anti-rotation part and the first locking hole and the second locking hole when the valve disc body of a stop valve with a valve disc split structure and the matching part are locked in the embodiment of the utility model;

[0034] Fig. 9 It is a top view of a throttling member of a stop valve with a valve disc split structure according to an embodiment of the utility model;

[0035] Fig.10 The throttling device of the embodiment of the utility model is along Fig. 9 Cross-sectional view taken along line CC in FIG.

[0036] Fig.11 The throttling device of the embodiment of the utility model is along Fig. 9 The cross-sectional view cut along the DD line in FIG.

[0037] Fig.12 It is a top view of an anti-scouring component of a stop valve with a valve disc split structure in an embodiment of the utility model;

[0038] Fig.13 The anti-scour member of the embodiment of the utility model is along Fig.12 A cross-sectional view taken along line EE in FIG.

[0039] Fig.14 The anti-scour member of the embodiment of the utility model is along Fig.12 The cross-sectional view taken along line FF in FIG.

[0040] In the figure: 1-valve body, 2-valve seat, 3-valve stem, 4-valve disc body, 5-matching part, 6-driving device, 11-first medium flow channel, 12-second medium flow channel, 13-third medium flow channel, 41-conical sealing surface, 51-throttling part, 52-anti-scouring part, 71-locking boss, 72-locking groove, 81-anti-rotation part, 82-first locking hole, 83-second locking hole, 521-annular groove, 711-boss body, 712-clamping block, 721-placing groove, 722-clamping groove. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings of the utility model specification to clearly and completely describe the technical solutions in the utility model embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0042] The following will be combined with a specific embodiment of the utility model and the attached Figure 1-14 In detail, a stop valve with a split valve disc structure is disclosed, including a valve body 1, a valve seat 2, a valve stem 3, a valve disc body 4 and a matching component 5. The valve body 1 is sequentially provided with a first medium flow channel 11, a second medium flow channel 12 and a third medium flow channel 13 which are interconnected. The valve seat 2 is arranged in the second medium flow channel 12. One end of the valve stem 3 is penetrated in the second medium flow channel 12 and is connected to the valve disc body 4, and the other end is connected to a driving device 6. The matching component 5 is used for detachably connecting with the valve disc body 4, so that the valve disc structure can meet the use requirements in different media environments and enhance the service life of the stop valve.

[0043] The adapter 5 is connected to the valve flap body 4 through the mounting portion, so that the adapter 5 and the valve flap body 4 are locked.

[0044] The mounting portion includes a locking boss 71 and a locking groove 72. The locking boss 71 is a T-shaped boss, and the locking groove 72 is arranged at the center of the adapter 5. The shapes of the locking boss 71 and the locking groove 72 are not limited to a T-shape, as long as the rotating locking boss 71 can be locked with the locking groove 72. At the same time, the structure of the mounting portion can also be interchangeably designed, so that the locking boss 71 fixedly arranged at the bottom of the valve flap body 4 is fixed to the center of the adapter 5, and the locking groove 72 opened on the adapter 5 is opened to the bottom of the valve flap body 4, so that the original valve flap body 4 only needs to open the locking groove 72, and can continue to be used normally without replacing other parts, which effectively reduces the operating cost;

[0045] The locking boss 71 includes a boss body 711 and a snap-fit ​​block 712. The boss body 711 is fixedly arranged at the bottom of the valve flap body 4, and the snap-fit ​​block 712 is fixedly arranged at the lower outer side of the boss body 711.

[0046] The locking groove 72 includes a placement groove 721 for accommodating the locking boss 71 and a locking groove 722 cooperating with the locking block 712. The placement groove 721 is opened at the top of the connecting part 5, and the locking groove 722 is located at the lower outer side of the placement groove 721, and the two are connected, so that the locking block 712 can be rotated from the placement groove 721 to the locking groove 722. The inner top surface of the locking groove 722 is provided with a blocking surface for preventing the connecting part 5 from falling off. The locking boss 71 extends into the placement groove 721 and rotates to drive the locking block 712 to extend into the locking groove 722, so that the valve flap body 4 and the connecting part 5 are locked.

[0047] An anti-rotation mechanism is also provided between the adapter 5 and the valve flap body 4, and the anti-rotation mechanism includes an anti-rotation member 81 and a first locking hole 82 and a second locking hole 83 for placing the anti-rotation member 81. The number of the first locking hole 82 and the second locking hole 83 are two respectively. The first locking hole 82 is opened at the bottom of the valve flap body 4 and is located on the outside of the boss body 711. The second locking hole 83 is opened at the top of the adapter 5 and is located on the outside of the locking groove 72. The depth of the first locking hole 82 is not less than the height of the anti-rotation member 81, and the depth of the second locking hole 83 is less than the height of the anti-rotation member 81.

[0048] When the locking boss 71 is placed in the placement groove 721 and is not locked, the first locking hole 82 and the second locking hole 83 are in a staggered state, and the adapter 5 prevents the anti-rotation member 81 from sliding into the second locking hole 83;

[0049] When the locking boss 71 and the locking groove 72 are locked, the first locking hole 82 and the second locking hole 83 are in a connected state, and the two ends of the anti-rotation member 81 are respectively matched with the first locking hole 82 and the second locking hole 83, and the upper end of the anti-rotation member 81 is always in the first locking hole 82.

[0050] The upper end of the anti-rotation component 81 is always in the first locking hole 82 when unlocked and locked, and the lower end of the anti-rotation component 81 will fall into the second locking hole 83 after locking. The above design utilizes the cooperation between the anti-rotation component 81 and the first locking hole 82 and the second locking hole 83, so that the problem of shaking will not occur during the locking process of the connecting component 5 and the valve flap body 4, and the problem of the connecting component 5 and the valve flap body 4 falling off from the valve flap body 4 due to relative rotation between the connecting component 5 and the valve flap body 4 caused by the fluid after the locking block 712 of the valve flap body 4 extends into the locking groove 722 of the connecting component 5 can be avoided.

[0051] In this embodiment, the anti-rotation component 81 is a pin shaft, and the first locking hole 82 and the second locking hole 83 are respectively circular holes. In other embodiments, the anti-rotation component 81, the first locking hole 82 and the second locking hole 83 can also be other shapes. For example, if the anti-rotation component 81 is of one shape, the cross-sections of the first locking hole 82 and the second locking hole 83 are other shapes that match the anti-rotation component 81.

[0052] The adapter 5 is a throttling member 51 or an anti-scouring member 52 .

[0053] The throttling member 51 is conical in shape, and a second locking hole 83 and a locking groove 72 are provided on the top of the throttling member 51. The locking groove 72 is used to cooperate with the locking boss 71 for locking. The design of the throttling member 51 can effectively control the flow of the medium in the stop valve to improve the throttling effect of the stop valve.

[0054] The anti-scour component 52 is cylindrical, and a second locking hole 83 and a locking groove 72 for locking with the locking boss 71 are provided on the top of the anti-scour component 52. A plurality of annular grooves 521 are provided on the side wall of the anti-scour component 52. The design of the anti-scour component 52 can effectively reduce the scouring force of the medium in the stop valve on the sealing surface of the valve seat 2 and the valve disc body 4, so as to increase the service life of the stop valve.

[0055] A conical sealing surface 41 is provided on the outer peripheral wall of the lower part of the valve flap body 4 , and the driving device 6 drives the valve stem 3 to move up and down to drive the conical sealing surface 41 of the valve flap body 4 to fit or separate from the valve seat 2 .

[0056] The workflow of this utility model:

[0057] When the stop valve is only used as a shut-off valve, there is no need to install a matching part on the lower side of the valve disc body 4. When the stop valve is still needed to play a throttling role, the throttling part 51 is selected as the matching part 5 and installed on the lower side of the valve disc body 4. According to the applicable working conditions of the stop valve, when the stop valve disc structure is required to have an anti-scouring function and it is necessary to install a matching part 5 on the lower side of the valve disc body 4, the anti-scouring part 52 is selected as the matching part 5 and installed on the lower side of the valve disc body 4.

[0058] Installation method of the adapter 5 and the valve disc body 4:

[0059] The valve flap body 4 is placed upside down, the anti-rotation member 81 is placed in the first locking hole 82, the placement groove 721 of the locking groove 72 at the top of the adapter 5 is aligned with the locking block 712 of the locking boss 71 on the valve flap body 4, and the adapter 5 is moved downward so that the locking boss 71 is located in the placement groove 721 as a whole, and then the adapter 5 is rotated forward to drive the locking boss 71 to rotate, so that the locking block 712 extends into the locking groove 722, so as to realize the locking function of the valve flap body 4 and the adapter 5. When the locking block 712 is fully inserted into the locking groove 722, the outer wall of the locking block 712 abuts against the inner wall of the locking groove 722, and the locking block 712 cannot continue to rotate forwardly. At this time, the first locking hole 82 and the second locking hole 83 are coaxial, and the valve flap body 4 and the matching part 5 are turned vertically. The lower end of the anti-rotation member 81 falls from the first locking hole 82 into the second locking hole 83, and the upper end is still located in the first locking hole 82, so that the anti-rotation member 81 can prevent the matching part 5 and the valve flap body 4 from rotating after being locked.

[0060] If it is necessary to disassemble the adapter 5 and the valve flap body 4, flip the adapter 5 and the valve flap body 4 vertically so that the anti-rotation part 81 falls completely into the first locking hole 82, and then reverse the adapter 5 relatively to drive the locking boss 71 to reverse relatively, so that the locking block 712 at the front end of the locking boss 71 rotates to the placement groove 721 of the lock groove 72, and then pull the adapter 5 out of the placement groove 721 to realize the disassembly of the adapter 5 and the valve flap body 4.

[0061] When the matching part 5 needs to be replaced so that the stop valve has an anti-scour function or a throttling function, the corresponding anti-scour part 52 or throttling part 51 is installed accordingly to meet the use requirements of the stop valve in various working conditions, thereby increasing the use range of the valve and reducing the cost waste caused by the need to replace all parts of the valve as a whole.

[0062] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.

Claims

1. A stop valve with a split valve disc structure, characterized in that: The invention comprises a valve body (1), a valve seat (2), a valve stem (3), a valve flap body (4) and a matching part (5); the valve body (1) is provided with a first medium flow channel (11), a second medium flow channel (12) and a third medium flow channel (13) which are interconnected in sequence; the valve seat (2) is arranged in the second medium flow channel (12); one end of the valve stem (3) is inserted into the second medium flow channel (12) and is connected to the valve flap body (4); the other end is connected to a driving device (6); the matching part (5) is used for being detachably connected to the valve flap body (4).

2. A stop valve with a valve disc split structure according to claim 1, characterized in that: The adapter (5) is connected to the valve flap body (4) via a mounting portion, wherein the mounting portion comprises a locking boss (71) and a locking groove (72). The locking boss (71) comprises a boss body (711) and a locking block (712); the boss body (711) is fixedly arranged at the bottom of the valve flap body (4); and the locking block (712) is fixedly arranged at the lower outer side of the boss body (711). The locking groove (72) comprises a placement groove (721) for accommodating the locking boss (71) and a snap-fitting groove (722) cooperating with the snap-fitting block (712); the placement groove (721) is arranged at the top of the connecting piece (5); the snap-fitting groove (722) is located at the lower outer side of the placement groove (721), and the two are connected so that the snap-fitting block (712) can be rotated from the placement groove (721) into the snap-fitting groove (722); the inner top surface of the snap-fitting groove (722) is provided with a blocking surface for preventing the connecting piece (5) from falling off.

3. A stop valve with a valve disc split structure according to claim 2, characterized in that: An anti-rotation mechanism is also provided between the adapter (5) and the valve flap body (4), the anti-rotation mechanism comprising an anti-rotation member (81) and a first locking hole (82) and a second locking hole (83) for accommodating the anti-rotation member (81), the first locking hole (82) being provided at the bottom of the valve flap body (4) and being located at the outer side of the boss body (711). The second locking hole (83) is opened at the top of the fitting (5) and is located outside the locking groove (72). The depth of the first locking hole (82) is not less than the height of the anti-rotation component (81), and the depth of the second locking hole (83) is less than the height of the anti-rotation component (81). When the locking boss (71) is placed in the placement groove (721) and is not locked, the first locking hole (82) and the second locking hole (83) are in a staggered state, and the matching component (5) blocks the anti-rotation component (81) from sliding into the second locking hole (83); When the locking boss (71) and the locking groove (72) are locked, the first locking hole (82) and the second locking hole (83) are in a connected state, and the two ends of the anti-rotation component (81) are respectively matched with the first locking hole (82) and the second locking hole (83).

4. A stop valve with a split valve disc structure according to claim 3, characterized in that: The number of the first locking hole (82) and the number of the second locking hole (83) are respectively two, and the locking groove (72) is arranged at the center of the fitting (5).

5. The stop valve with a valve disc split structure according to claim 3, characterized in that: The matching part (5) is a throttling part (51) or an anti-scouring part (52).

6. The stop valve with a split valve disc structure according to claim 5, characterized in that: The throttling member (51) is conical in shape, and the top of the throttling member (51) is provided with the second locking hole (83) and the locking groove (72), and the locking groove (72) is used for locking with the locking boss (71).

7. The stop valve with a valve disc split structure according to claim 5, characterized in that: The anti-scour component (52) is cylindrical, the top of the anti-scour component (52) is provided with the second locking hole (83) and the locking groove (72) for locking with the locking boss (71), and the side wall of the anti-scour component (52) is provided with a plurality of annular grooves (521).

8. The stop valve with a split valve disc structure according to claim 2, characterized in that: The locking boss (71) is a T-shaped boss.

9. The stop valve with a split valve disc structure according to claim 3, characterized in that: The anti-rotation component (81) is a pin.

10. The stop valve with a split valve disc structure according to claim 1, characterized in that: A conical sealing surface (41) is provided on the lower outer peripheral wall of the valve flap body (4), and the driving device (6) drives the valve stem (3) to move up and down, so as to drive the conical sealing surface (41) of the valve flap body (4) to fit or separate from the valve seat (2).

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