Stainless steel core opening and closing valve

Abstract

The utility model discloses a stainless steel core opening and closing valve which comprises a valve shell. A base is arranged at the lower end of the valve shell, a valve rod is connected to the middle of the base in a sliding mode, a stainless steel valve element is arranged in the middle of the outer arc face of the valve rod, a polytetrafluoroethylene sealing seat is arranged in the valve shell, and the contact face of the stainless steel valve element and the polytetrafluoroethylene sealing seat is an arc-shaped taper face. The lower end of the valve rod is movably sleeved with a spring which is located between the stainless steel valve element and the base. A leather cup is arranged at the upper end of the valve rod and connected with the inner arc wall of the upper end of the valve shell in a sliding mode, a valve cover is arranged at the upper end of the valve shell, an impurity blocking assembly is arranged at the lower end of the stainless steel valve element and comprises a conical cover, and the conical cover is arranged at the lower end of the stainless steel valve element through a connecting base. The stainless steel valve element and the sealing face of the polytetrafluoroethylene sealing seat are in arc-shaped taper sealing, the self-centering accuracy of the stainless steel valve element is high, meanwhile, sundries can be prevented from being clamped, and the stainless steel element opening and closing valve has a good sealing effect.

Description

TECHNICAL FIELD

[0001] The utility model relates to on-off valve technical field, concretely is stainless steel core on-off valve. BACKGROUND

[0002] Valves are widely used in pipeline of various working conditions of petroleum, chemical industry, pharmacy, electric power industry etc., especially suitable for normal pressure boiler backwater pipeline, also can be used as the liquid control switch of pipeline, in the closed state of on-off valve, the valve core and the valve seat form the complete seal barrier between, prevent medium passing, need to open, the valve stem moves down and makes the valve core and the valve seat form the gap between, fluid flows smoothly, the valve core sealing of on-off valve in prior art is plane form, when there is sundry in pipeline, sundry can be clamped into the gap, can appear the situation of clamping sundry, can cause the probability sealing leakage when this situation appears. UTILITY MODEL CONTENTS

[0003] The utility model solves the technical problem of overcoming the defects of the prior art, provides stainless steel core on-off valve, the sealing surface of stainless steel valve core and tetrafluoro seal seat is arc taper sealing, stainless steel valve core is high in self-centering precision, meanwhile can avoid clamping sundry, stainless steel core on-off valve has good sealing effect, can effectively solve the problems in the background art.

[0004] To achieve the above object, the utility model provides the following technical scheme: stainless steel core on-off valve, including valve shell,

[0005] Valve shell: its lower end is equipped with base, the middle part of base is connected with valve rod slidingly, the middle part of outer arc surface of valve rod is equipped with stainless steel valve core, the inside of valve shell is equipped with tetrafluoro seal seat, the contact surface of stainless steel valve core and tetrafluoro seal seat is arc taper surface, the lower end of valve rod is movably sleeved with spring, and the spring is located between stainless steel valve core and base, the upper end of valve rod is equipped with leather bowl, and the leather bowl is connected with the inner arc wall of upper end of valve shell slidingly, the upper end of valve shell is equipped with valve cover, the lower end of stainless steel valve core is equipped with sundry blocking assembly, can block the sundry of large particle when opening, avoid sundry clamping between stainless steel valve core and tetrafluoro seal seat, meanwhile, the sealing surface of stainless steel valve core and tetrafluoro seal seat is arc taper sealing, stainless steel valve core is high in self-centering precision, meanwhile can avoid clamping sundry, stainless steel core on-off valve has good sealing effect.

[0006] Further, the sundry blocking assembly includes a conical cover, which is arranged at the lower end of the stainless steel valve core through a connecting seat, and the gap between the conical cover and the stainless steel valve core is smaller than the gap between the stainless steel valve core and the tetrafluoro seal seat after the stainless steel valve core is opened, thereby avoiding the sundry from being clamped into the sealing position.

[0007] Further, the blocking assembly further comprises a support pipe and a water blocking pipe, the support pipe is arranged in the interior of the valve shell, the water blocking pipe is arranged outside the conical cover, the upper end of the water blocking pipe is in sliding connection with the support pipe, the conical cover is provided with movement guide, and water body is ensured to flow upward from the lower end of the conical cover.

[0008] Further, the upper end of the valve rod is sequentially provided with a lower support plate and an upper pressing plate from bottom to top, the rubber bowl is located between the lower support plate and the upper pressing plate, and the rubber bowl is provided with support.

[0009] Further, the lower end of the valve shell is provided with a lower sealing gasket, the lower surface of the lower sealing gasket is in contact with the upper surface of the base, the upper end of the valve shell is provided with an upper sealing gasket, the upper surface of the upper sealing gasket is in contact with the lower surface of the valve cover, and the sealing property of the valve body itself is improved.

[0010] Further, the middle part of the flange at the left and right ends of the valve shell is provided with a boss, and the external sealing gasket is pressed.

[0011] Further, a threaded groove is arranged at the control hole of the upper end of the valve cover, and the connection of the control pipeline is facilitated.

[0012] Compared with the prior art, the stainless steel core on-off valve has the following advantages.

[0013] When being opened, the large-particle impurities can be blocked, the impurities are prevented from being clamped between the stainless steel valve core and the PTFE sealing seat, the surface of the stainless steel valve core is well washed, when being automatically closed, the sealing surface of the stainless steel valve core and the PTFE sealing seat is arc-shaped and tapered, the self-centering precision of the stainless steel valve core is improved, the clamping of the impurities is avoided, and the stainless steel core on-off valve has good sealing effect. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a structural schematic view of the utility model;

[0015] Figure 2 It is a sectional structural schematic view of the valve shell of the utility model;

[0016] Figure 3 It is an enlarged structural schematic view of position A of the utility model;

[0017] Figure 4 It is an enlarged structural schematic view of position B of the utility model.

[0018] In the drawing: 1, valve shell; 2, base; 3, valve rod; 4, stainless steel valve core; 5, PTFE sealing seat; 6, spring; 7, rubber bowl; 8, valve cover; 9, threaded groove; 10, lower support plate; 11, upper pressing plate; 12, boss; 13, lower sealing gasket; 14, upper sealing gasket; 15, support pipe; 16, water blocking pipe; 17, conical cover. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0020] Please refer to Figures 1-4 The embodiment provides a technical scheme: a stainless steel core on-off valve, which comprises a valve shell 1;

[0021] Valve shell 1: its lower end is provided with base 2, the left and right ends of valve shell 1 are connected with the pipeline to be controlled, the middle part of base 2 is slidably connected with valve rod 3, base 2 provides sliding guide for valve rod 3, the middle part of the outer arc surface of valve rod 3 is provided with stainless steel valve core 4, the inner part of valve shell 1 is provided with four fluorine sealing seat 5, the contact surface of stainless steel valve core 4 and four fluorine sealing seat 5 is arc taper surface, the sealing area can be reduced to solve the clamping of sundries, and the accuracy of self-centering of valve core is increased, the lower end of valve rod 3 is movably sleeved with spring 6, spring 6 is located between stainless steel valve core 4 and base 2, stainless steel valve core 4 is driven downward to separate from four fluorine sealing seat 5 and compress spring 6 at the same time, spring 6 drives stainless steel valve core 4 to move upward to contact four fluorine sealing seat 5 for sealing, the upper end of valve rod 3 is provided with leather cup 7, leather cup 7 is slidably connected with the inner arc wall of the upper end of valve shell 1, the upper end of valve shell 1 is provided with valve cover 8, the external pressure medium enters the cavity formed by valve shell 1, leather cup 7 and valve cover 8 through control hole, the lower end of stainless steel valve core 4 is provided with sundry blocking assembly, the sundry blocking assembly comprises conical cover 17, conical cover 17 is arranged at the lower end of stainless steel valve core 4 through connecting seat, the water body passes through the gap between conical cover 17 and stainless steel valve core 4 and then passes through four fluorine sealing seat 5 to be discharged from the right side of valve shell 1, conical cover 17 guides the water body, the surface of stainless steel valve core 4 is washed, small sundries are prevented from being deposited on the outer arc surface of stainless steel valve core 4, the gap between conical cover 17 and stainless steel valve core 4 is smaller than the gap between stainless steel valve core 4 and four fluorine sealing seat 5 after stainless steel valve core 4 is opened, large sundries are prevented from being clamped between stainless steel valve core 4 and four fluorine sealing seat 5, the sundry blocking assembly further comprises supporting pipe 15 and water blocking pipe 16, supporting pipe 15 is arranged in the inner part of valve shell 1, water blocking pipe 16 is arranged outside conical cover 17, the upper end of water blocking pipe 16 is slidably connected with supporting pipe 15, supporting pipe 15 and water blocking pipe 16 provide moving guide for conical cover 17 and ensure the upward flow of water body from the lower end of conical cover 17, the upper end of valve rod 3 is sequentially provided with lower supporting plate 10 and upper pressing plate 11 from bottom to top, leather cup 7 is located between lower supporting plate 10 and upper pressing plate 11, the pressure at the upper end of leather cup 7 is greater than that at the lower end, leather cup 7 is driven downward by lower supporting plate 10 and upper pressing plate 11 under the sealing action of leather cup 7, the lower end of valve shell 1 is provided with lower sealing gasket 13, the lower surface of lower sealing gasket 13 is in contact with the upper surface of base 2, lower sealing gasket 13 improves the sealing property of base 2 and valve shell 1, the upper end of valve shell 1 is provided with upper sealing gasket 14, the upper surface of upper sealing gasket 14 is in contact with the lower surface of valve cover 8, upper sealing gasket 14 improves the sealing property of valve shell 1 and valve cover 8, the middle part of the flange at the left and right ends of valve shell 1 is provided with boss 12, boss 12 facilitates the compression of sealing gasket at the connection, screw groove 9 is arranged at the control hole of the upper end of valve cover 8, which facilitates the connection of pressure pipeline.

[0022] The working principle of the stainless steel core on-off valve is as follows: in use, the valve shell 1 left and right two ends are connected with the pipeline to be controlled, the boss 12 facilitates the compression of the sealing gasket at the connection, in opening, the external pressure medium enters into the cavity formed by the valve shell 1, the leather cup 7 and the valve cover 8 through the control hole, the pressure at the upper end of the leather cup 7 is greater than that at the lower end, and then the leather cup 7 is driven to move downwards through the lower supporting plate 10 and the upper pressing plate 11 under the sealing action, the valve rod 3 drives the stainless steel valve core 4 to move downwards and separate from the PTFE sealing seat 5 while compressing the spring 6, the water body at the left end passes through the gap between the conical cover 17 and the stainless steel valve core 4 and then passes through the PTFE sealing seat 5 to be discharged from the right side of the valve shell 1, the gap between the conical cover 17 and the stainless steel valve core 4 is smaller than the gap between the stainless steel valve core 4 and the PTFE sealing seat 5 after the stainless steel valve core 4 is opened, so that the large-particle impurities can be prevented from being clamped between the stainless steel valve core 4 and the PTFE sealing seat 5, meanwhile, the conical cover 17 can guide the water body, the surface of the stainless steel valve core 4 can be washed, and then the small-particle impurities can be prevented from staying on the outer arc surface of the stainless steel valve core 4, in closing, the pressure at the upper end is removed, the spring 6 drives the stainless steel valve core 4 to move upwards and contact the PTFE sealing seat 5 to seal, the stainless steel valve core 4 and the PTFE sealing seat 5 are arc-tapered to seal, the sealing reduces the sealing area and can prevent the impurities from being clamped, the clamping of the impurities can be solved, and the precision of the self-centering of the valve core is increased.

[0023] The above is only the embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structure or equivalent process conversion using the utility model specification and the attached drawing contents, or direct or indirect application in other related technical fields, is also included in the patent protection range of the utility model.

Claims

1. A stainless steel core on / off valve characterized by: The valve shell (1) comprises a base (2) at the lower end, a valve rod (3) slidably connected to the middle of the base (2), a stainless steel valve core (4) arranged on the outer arc surface of the valve rod (3), a fluorine-free sealing seat (5) arranged in the valve shell (1), an arc taper surface between the stainless steel valve core (4) and the fluorine-free sealing seat (5), a spring (6) movably sleeved on the lower end of the valve rod (3), the spring (6) being arranged between the stainless steel valve core (4) and the base (2), a leather cup (7) arranged on the upper end of the valve rod (3), the leather cup (7) being slidably connected to the inner arc wall of the upper end of the valve shell (1), a valve cover (8) arranged on the upper end of the valve shell (1), and a foreign matter blocking assembly arranged on the lower end of the stainless steel valve core (4). The foreign matter blocking assembly comprises a conical cover (17) arranged on the lower end of the stainless steel valve core (4) through a connecting seat, and the gap between the conical cover (17) and the stainless steel valve core (4) is smaller than the gap between the stainless steel valve core (4) and the fluorine-free sealing seat (5) when the stainless steel valve core (4) is opened.

2. The stainless steel core open and close valve according to claim 1, characterized by: The foreign matter blocking assembly further comprises a supporting pipe (15) arranged in the valve shell (1) and a water blocking pipe (16) arranged outside the conical cover (17), the upper end of the water blocking pipe (16) being slidably connected to the supporting pipe (15).

3. The stainless steel core open and close valve according to claim 2, characterized by: The upper end of the valve rod (3) is sequentially provided with a lower supporting plate (10) and an upper pressing plate (11) from bottom to top, and the leather cup (7) is arranged between the lower supporting plate (10) and the upper pressing plate (11).

4. The stainless steel core open and shut valve according to claim 1, characterized by: The lower end of the valve shell (1) is provided with a lower sealing gasket (13), the lower surface of the lower sealing gasket (13) being in contact with the upper surface of the base (2), the upper end of the valve shell (1) is provided with an upper sealing gasket (14), and the upper surface of the upper sealing gasket (14) is in contact with the lower surface of the valve cover (8).

5. The stainless steel core open and shut valve according to claim 1, characterized by: The middle of the flanges at the left and right ends of the valve shell (1) is provided with a boss (12).

6. The stainless steel core open and shut valve according to claim 1, characterized by: A threaded groove (9) is arranged at the control hole of the upper end of the valve cover (8).

7. The stainless steel core open and shut valve according to claim 1, characterized by: ​

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