Flow-controllable stop valve

Abstract

The utility model discloses a flow-controllable stop valve which is characterized by further comprising a pressure reduction buffer structure which is installed in a valve front channel of a valve body and used for reducing the flow velocity and pressure of a medium. The pressure reduction buffer structure comprises a plurality of flow slowing plates installed in the valve front channel in a stacked mode, a locking screw plate used for limiting and installing the flow slowing plates in the valve front channel and a plurality of through holes formed in the flow slowing plates and the locking screw plate and used for medium circulation. According to the utility model, through the arrangement of the pressure reduction buffer structure, the pressure of a medium is reduced, the flow speed of the medium is reduced, and the impact force of the medium is reduced, so that the normal use of equipment behind the valve is prevented from being influenced by overlarge pressure of the medium in front of the valve, and meanwhile, the flow of the medium after pressure reduction and speed reduction is controllable.

Description

TECHNICAL FIELD

[0001] The utility model relates to a stop valve, concretely refers to a flow controllable stop valve. BACKGROUND

[0002] As the core component of controlling fluid on-off in industrial pipeline system, the typical structure of stop valve is composed of valve body, valve cover, valve rod and conical / flat valve clapper. The traditional stop valve realizes full opening or full closing of flow passage through vertical lifting of valve clapper, but when the medium pressure before valve is large, the medium pressure is large, the flow velocity is fast, the impact is big, and it is difficult to control the medium flow after the opening of stop valve due to the large medium pressure, and the large medium pressure also has influence on the normal use of equipment after valve. Therefore, a flow controllable stop valve is proposed. SUMMARY

[0003] The utility model discloses a flow controllable stop valve to solve the above problems.

[0004] In order to achieve the above purpose, the utility model provides a flow controllable stop valve, which comprises a valve body, a support installed on the valve body, a valve cover installed on the valve body and the support, a valve rod slidingly installed on the valve cover and having one end in the valve body, and a valve core installed on one end of the valve rod. Its characteristics further comprise a pressure reducing and buffering structure installed in the valve front passage of the valve body for reducing the medium flow velocity pressure. The pressure reducing and buffering structure comprises a plurality of flow reduction plates installed in the valve front passage in a superimposed manner, a locking plate for limiting the installation of the flow reduction plate in the valve front passage, and a plurality of through holes provided on the flow reduction plate and the locking plate for medium flow.

[0005] Further preferably, the flow reduction plate further comprises a flow reduction cavity provided on the flow reduction plate.

[0006] Further preferably, the valve front passage further comprises a limiting table provided in the valve front passage and limiting the installation of the flow reduction plate.

[0007] Further preferably, the valve body further comprises a sleeve installed in the valve body and a sleeve locking nut installed on the valve body and used for tightly installing the sleeve in the valve body, and the sleeve is provided with a plurality of medium flow ports.

[0008] Further preferably, the valve body, the valve cover and the support further comprise a sealing ring installed therebetween and used for sealing.

[0009] Further preferably, the valve cover and the valve rod further comprise a graphite ring, an iron ring, a packing, a packing gland used for tightly pressing the packing, and a pressing plate installed on the support and used for tightly pressing the packing gland.

[0010] The utility model discloses a beneficial effect: through the setting of pressure reduction buffer structure, the pressure of medium plays the pressure reduction effect, and the flow rate of medium plays the speed reduction effect, reduces the impact force of medium, thereby avoiding that the medium pressure is too big before the valve and influences the normal use of the equipment behind the valve, and the flow of medium after pressure reduction and speed reduction is controllable simultaneously. BRIEF DESCRIPTION OF DRAWINGS

[0011] Fig. 1 It is the structure schematic diagram of the utility model;

[0012] Fig. 2 It is the structure schematic diagram of pressure reduction buffer structure in the utility model;

[0013] Fig. 3 It is the local structure schematic diagram of valve core and sleeve in the utility model.

[0014] Legend: 1, valve body;2, support;3, valve cover;4, valve stem;5, valve core;6, slow flow plate;61, locking screw plate;62, through -hole;63, slow flow cavity;64, limit station;7, sleeve;71, sleeve locking nut;72, medium flow passageway;8, sealing ring;9, graphite ring;91, iron ring;92, packing;93, packing gland;94, pressing plate. DETAILED DESCRIPTION

[0015] Below, we combine the drawings and make further explanation to the flow control stop valve described in the utility model.

[0016] It needs to be explained that all directionality indications such as upper, lower, left, right, front, back in the embodiment of the utility model are only used for explaining the relative position relationship, movement condition etc. between various components in a certain specific posture such as shown in the drawings, if the specific posture changes, then the directionality indications also change accordingly.

[0017] In the utility model, unless another explicit provision and limitation, the terms "connect", "fix" etc. should be understood broadly;For example, "fix" can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, unless another explicit limitation. For ordinary skilled in the art, can understand the specific meaning of the above terms in the utility model according to specific circumstances.

[0018] Reference Figs. 1-3As shown in the figure, the flow-controllable stop valve comprises a valve body 1, a support 2 mounted on the valve body 1, a valve cover 3 mounted on the valve body 1 and the support 2, a valve stem 4 slidingly mounted on the valve cover 3 and having one end in the valve body 1, and a valve core 5 mounted on one end of the valve stem 4; characterized in that it further comprises a pressure-reducing buffer structure mounted in the valve front passage of the valve body 1 for reducing the pressure of the medium flow; the pressure-reducing buffer structure comprises a plurality of flow-reducing plates 6 stacked in the valve front passage, locking plates 61 for limiting the flow-reducing plates 6 in the valve front passage, and a plurality of through holes 62 provided on the flow-reducing plates 6 and the locking plates 61 for allowing the medium to flow through; and further comprising flow-reducing cavities 63 provided on the flow-reducing plates 6.

[0019] The provision of the pressure-reducing buffer structure reduces the pressure of the medium and slows down the flow rate of the medium, thereby reducing the impact force of the medium and avoiding excessive pressure of the medium before the valve from affecting the normal use of the equipment after the valve.

[0020] The pressure-reducing buffer structure is formed by stacking a plurality of flow-reducing plates 6, and the medium is subjected to multi-stage pressure reduction and flow rate reduction through the plurality of flow-reducing plates 6, thereby improving the pressure reduction and flow rate reduction effect.

[0021] In one embodiment, the valve further comprises a limiting platform 64 provided in the valve front passage for limiting the installation of the flow-reducing plates 6, which limits the plurality of flow-reducing plates 6 installed in the valve front passage, and then the locking plates 61 are provided to tightly install the plurality of stacked flow-reducing plates 6 in the valve front passage by being threadedly mounted in the valve front passage.

[0022] In one embodiment, the valve further comprises a sleeve 7 mounted in the valve body 1 and a sleeve locking nut 71 mounted on the valve body 1 for tightly installing the sleeve 7 in the valve body 1, and the sleeve 7 is provided with a plurality of medium flow-through openings 72.

[0023] The provision of the sleeve 7 and the medium flow-through openings 72 on the sleeve 7 further reduces the pressure of the medium and buffers the medium, and the provision of the plurality of medium flow-through openings 72 makes the flow more controllable.

[0024] In one embodiment, the valve further comprises a sealing ring 8 mounted between the valve body 1, the valve cover 3 and the support 2 for sealing, which is provided to increase the sealing between the valve body 1, the valve cover 3 and the support 2.

[0025] In one embodiment, the valve further comprises a graphite ring 9, an iron ring 91, a packing 92, a packing gland 93 for tightly pressing the packing 92, and a pressing plate 94 mounted on the support 2 for tightly pressing the packing gland 93, which are mounted between the valve cover 3 and the valve stem 4.

[0026] The utility model discloses when using: when the valve stem 4 drives the valve core 5 action and opens the valve, after the medium before the valve enters the valve body 1, the medium is buffered and reduced pressure and reduced speed after passing through the slow flow board 6, and then flows to the valve core 5 and sleeve 7, and then flows to the valve after channel through the medium flow through mouth 72 on the sleeve 7, and then flows to the valve after equipment for using of the valve after equipment.

[0027] The protection scope of the utility model is not limited to the above embodiment and its transformation. The routine modification and replacement of the person skilled in the art based on the content of the embodiment all belong to the protection scope of the utility model.

Claims

1. A flow-controllable stop valve comprising a valve body (1), a bracket (2) mounted on the valve body (1), a valve cover (3) mounted on the valve body (1) and the bracket (2), a valve stem (4) slidingly mounted on the valve cover (3) and having one end in the valve body (1), and a valve core (5) mounted on one end of the valve stem (4); characterized in that It also comprises a pressure-reducing buffer structure installed in the pre-valve passage of the valve body (1) for reducing the pressure of the medium flow; the pressure-reducing buffer structure comprises a plurality of flow-reducing plates (6) installed in the pre-valve passage in a superimposed manner, locking plates (61) for limiting the installation of the flow-reducing plates (6) in the pre-valve passage, and a plurality of through holes (62) provided on the flow-reducing plates (6) and the locking plates (61) for allowing the medium to flow.

2. A flow-controllable stop valve according to claim 1, characterized in that: It also comprises flow-reducing cavities (63) provided on the flow-reducing plates (6).

3. A flow-controllable stop valve according to claim 1, characterized in that: It also comprises limiting platforms (64) provided in the pre-valve passage for limiting the installation of the flow-reducing plates (6).

4. A flow-controllable stop valve according to claim 1, characterized in that: It also comprises a sleeve (7) installed in the valve body (1) and a sleeve locking nut (71) installed on the valve body (1) for tightly installing the sleeve (7) in the valve body (1), and the sleeve (7) is provided with a plurality of medium flow ports (72).

5. A flow-controllable stop valve according to claim 1, characterized in that: It also comprises a sealing ring (8) installed between the valve body (1), the valve cover (3) and the support (2) for sealing.

6. A flow-controllable stop valve according to claim 5, characterised in that: It also comprises a graphite ring (9), an iron ring (91), a packing (92), a packing gland (93) for tightly pressing the packing (92), and a pressing plate (94) installed on the support (2) for tightly pressing the packing gland (93) installed between the valve cover (3) and the valve stem (4).

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