A new type of jacketed ball valve for the inlet and outlet of molten urine

Abstract

The present invention relates to the technical field of ball valves, and specifically discloses a new structure of a molten urine inlet and outlet jacketed ball valve, comprising a valve body and a valve stem, a ball being rotatably arranged in the valve body, the bottom end of the valve stem being fixedly installed on the top surface of the ball, a hard valve seat being fixedly installed in the valve body, a movable opening being provided on the side of the hard valve seat close to the ball, a soft valve seat being slidably arranged on the movable opening of the hard valve seat, the movable opening and the soft valve seat being both arranged in an annular shape, and an elastic compensation device being arranged on the side of the soft valve seat away from the ball. The present invention adopts for the first time a double combination sealing type of a valve sealing ball hard / hard seal and a hard / soft seal, the ball hard / hard seal can block the passage of particles in the medium, and prevent the solid particles in the valve body from tearing the sealing surface when the ball rotates, thereby improving the service life of the sealing ball, the hard / soft seal can effectively block the passage of liquid in the medium, and improve the sealing effect of the sealing ball.

Description

Technical Field

[0001] The invention relates to the technical field of ball valves, and in particular to a molten urine inlet and outlet jacketed ball valve with a novel structure. Background Art

[0002] In the process of urea preparation, a ball valve is needed. A ball valve uses a sphere with a circular channel as an opening and closing part. The ball rotates with the valve stem to achieve the opening and closing action. The opening and closing part of the ball valve is a sphere with a hole, which rotates around an axis perpendicular to the channel to achieve the purpose of opening and closing the channel. The ball valve is mainly used to open and close pipelines and equipment media.

[0003] The inlet and outlet of molten urine are equipped with multiple groups of insulated ball valves. The medium used by the valve is urine. Urine is prone to crystallization during temperature changes, causing solid and liquid dual flows in the medium. The seals of the insulated ball valve are 316L and PTFE. Because the surface hardness of the ball is not enough and PTFE is relatively soft, when the valve is turned on and off, the valve body is rotated, and the solid particles in the medium can easily tear the ball and scratch the sealing surface of PTFE. After multiple switches, the valve will leak internally, which needs to be improved. For this reason, a new structure of the molten urine inlet and outlet jacketed ball valve is proposed. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a molten urine inlet and outlet jacket ball valve with a new structure which can prevent solid particles in the valve body from scratching the sealing surface when the ball rotates, thereby increasing the service life of the sealing ball, while also being able to effectively block the passage of liquid in the medium and improving the sealing effect of the sealing ball.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a new structure of a molten urine inlet and outlet jacketed ball valve, including a valve body and a valve stem, a ball is rotatably arranged in the valve body, the bottom end of the valve stem is fixedly installed on the top surface of the ball, a hard valve seat is fixedly installed in the valve body, a movable opening is opened on the side of the hard valve seat close to the ball, a soft valve seat is slidably arranged on the movable opening of the hard valve seat, the movable opening and the soft valve seat are both arranged in a ring shape, and an elastic compensation device is arranged on the side of the soft valve seat away from the ball.

[0006] Preferably, the elastic compensation device is made of zinc metal material into a semicircular ring-shaped compensation device, and the size of the elastic compensation device is compatible with the inner diameter of the movable opening.

[0007] Preferably, the ball is made of 316L and its surface is hardened, the ball fits with the hard valve seat and the surface of the ball fits with the side of the soft valve seat.

[0008] Preferably, the hard valve seat sealing part material is made of heat-treated duplex stainless steel, and the soft valve seat material is set to PTFE.

[0009] Preferably, the size of the soft valve seat is matched with the size of the movable port.

[0010] Preferably, the side edge of the soft valve seat is in close contact with the surface of the sphere.

[0011] In summary, compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. The present invention designs a special elastic compensation device on the back of the PTFE soft valve seat, so that the device has the function of elastic compensation, which prevents the valve seat from cold flow deformation under pressure, can effectively improve the sealing performance of the valve seat and the ball, and extend the service life of the valve.

[0013] 2. The present invention adopts for the first time a dual combination sealing type of hard / hard seal and hard / soft seal of the valve sealing ball. The hard / hard seal of the ball can block the passage of particles in the medium, preventing solid particles in the valve body from scratching the sealing surface when the ball rotates, thereby increasing the service life of the sealing ball. The hard / soft seal can effectively block the passage of liquid in the medium, thereby improving the sealing effect of the sealing ball.

[0014] 3. The ball of the present invention adopts 316L and its surface is hardened, which can improve the surface hardness of the ball without affecting the corrosion resistance, increase corrosion resistance, and improve tensile resistance. The material of the hard valve seat sealing part is duplex stainless steel after heat treatment, which can improve its own hardness. The soft valve seat material is set to PTFE material, which has excellent chemical stability, corrosion resistance, sealing, insulation and good aging resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a side cross-sectional structural diagram of the present invention;

[0016] Figure 2 It is a top plan structural diagram of the present invention;

[0017] Figure 3 It is a structural diagram of a hard valve seat and a soft valve seat of the present invention;

[0018] Figure 4 This is a structural diagram of the elastic compensation device of the present invention when no elastic force is stored;

[0019] Figure 5 This is a structural diagram of the elastic compensation device of the present invention after storing elastic force.

[0020] Legend:

[0021] 1. Valve body; 2. Valve stem; 3. Ball; 4. Hard valve seat; 5. Movable port; 6. Soft valve seat; 7. Elastic compensation device. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] See also Figure 1-5 The present invention provides a technical solution: a new structure of a molten urine inlet and outlet jacketed ball valve, comprising a valve body 1 and a valve stem 2, a ball 3 is rotatably arranged in the valve body 1, the bottom end of the valve stem 2 is fixedly installed on the top surface of the ball 3, a hard valve seat 4 is fixedly installed in the valve body 1, a movable opening 5 is opened on the side of the hard valve seat 4 close to the ball 3, a soft valve seat 6 is slidably arranged on the hard valve seat 4 on the movable opening 5, the movable opening 5 and the soft valve seat 6 are both arranged in annular shapes, and an elastic compensation device 7 is arranged on the side of the soft valve seat 6 away from the ball 3.

[0024] When installing and debugging the hard / hard seal in the valve, a micro-contact method is adopted between the ball 3 and the hard valve seat 4. When installing and debugging the ball valve, the hard / soft seal in the valve is combined with the performance characteristics of PTFE to apply a certain sealing pressure ratio. The semi-circular elastic compensation device 7 on the soft valve seat 6 stores a certain elastic force, and the PTFE soft valve seat 6 can be slightly displaced in the movable port 5. When medium flows in the valve body 1 and the medium pressure changes, that is, when the medium pressure is high and the sealing pressure ratio increases, the force exerted by the ball 3 on the PTFE soft valve seat 6 increases, and the semi-circular elastic compensation device 7 absorbs the force on the valve seat, making the PTFE soft valve seat 6 not easily deformed by cold flow, thereby ensuring the sealing reliability of the ball 3. When the pressure drops and the sealing pressure ratio decreases, the semi-circular elastic compensation device 7 will release the elastic force, prompting the PTFE soft valve seat 6 to be in close contact with the ball 3, thereby ensuring the ball valve in the pipeline. Long-term effective sealing. Similarly, when the temperature of the pipeline medium changes, due to the large expansion coefficient of PTFE, the size of the PTFE soft valve seat 6 becomes larger when the temperature is high. At this time, the special elastic compensation device 7 absorbs the elastic force to prevent the valve seat from deforming. Conversely, when the temperature is low, the size of the valve seat will become smaller. At this time, the semi-circular elastic compensation device 7 will release the elastic force, and the valve seat and the ball 3 are in close contact to achieve effective sealing. Rotating the valve stem 2 can drive the sealing ball 3 to rotate in the valve body 1, and the fluid deflection adjusts the medium flowing in the pipeline. The present invention is the first to adopt a double combination sealing type of valve sealing ball hard / hard seal and hard / soft seal. The ball hard / hard seal can block the particles in the medium from passing through, and prevent the solid particles in the valve body 1 from scratching the sealing surface when the ball 3 rotates, thereby increasing the service life of the sealing ball 3. The hard / soft seal can effectively block the liquid in the medium from passing through, and improve the sealing effect of the sealing ball 3.

[0025] The elastic compensation device 7 is made of zinc metal material into a semicircular ring-shaped compensation device, and the size of the elastic compensation device 7 is adapted to the inner diameter of the movable port 5; the semicircular ring-shaped elastic compensation device 7 can have a certain elastic compensation effect, which can prevent the valve seat from cold flow deformation under pressure, thereby effectively improving the sealing performance of the soft valve seat 6 and the ball 3. The size of the elastic compensation device 7 is adapted to the inner diameter of the movable port 5, which can improve the stability of the elastic compensation device 7 when subjected to a force, and improve the stability of the soft valve seat 6.

[0026] The ball 3 is made of 316L and its surface is hardened. The ball 3 fits against the hard valve seat 4 and the surface of the ball 3 fits against the side of the soft valve seat 6. The ball 3 is made of 316L and its surface is hardened, which can improve the surface hardness of the ball 3 without affecting the corrosion resistance, increase the corrosion resistance, and improve the tensile resistance.

[0027] The material of the sealing part of the hard valve seat 4 is duplex stainless steel that has been heat-treated to improve its own hardness, and the material of the soft valve seat 6 is set to PTFE; duplex stainless steel can further improve the hardness of the valve seat sealing surface (HRC≥50), and PTFE material has excellent chemical stability, corrosion resistance, sealing, insulation and good aging resistance.

[0028] The size of the soft valve seat 6 is adapted to the size of the movable opening 5 , which can improve the stability of the soft valve seat 6 in the movable opening 5 .

[0029] The side edge of the soft valve seat 6 is in close contact with the surface of the ball 3, which can further improve the sealing effect of the ball 3 when it is softly sealed.

[0030] Working principle:

[0031] When installing and debugging the hard / hard seal in the valve, a micro-contact method is used between the ball 3 and the hard valve seat 4. When installing and debugging the ball valve, the hard / soft seal in the valve applies a certain sealing pressure ratio in combination with the performance characteristics of PTFE. The semicircular elastic compensation device 7 on the soft valve seat 6 stores a certain elastic force, and the PTFE soft valve seat 6 can be slightly displaced in the movable port 5;

[0032] When medium flows in the valve body 1 and the medium pressure changes, that is, when the medium pressure is high and the sealing specific pressure increases, the force exerted by the ball 3 on the PTFE soft valve seat 6 increases, and the semicircular elastic compensation device 7 absorbs the force on the valve seat, making the PTFE soft valve seat 6 less likely to deform due to cold flow, thereby ensuring the sealing reliability of the ball 3;

[0033] When the pressure drops and the sealing specific pressure decreases, the semicircular elastic compensation device 7 will release the elastic force, causing the PTFE soft valve seat 6 to be in close contact with the ball 3, ensuring the long-term effective sealing of the ball valve in the pipeline;

[0034] When the temperature of the pipeline medium changes, due to the large expansion coefficient of PTFE, the size of the PTFE soft valve seat 6 becomes larger when the temperature is high. At this time, the special elastic compensation device 7 absorbs the elastic force to prevent the valve seat from deforming. On the contrary, the size of the valve seat will become smaller when the temperature is low. At this time, the semicircular elastic compensation device 7 will release the elastic force, and the valve seat and the ball 3 will be in close contact to achieve effective sealing. Rotating the valve stem 2 can drive the sealing ball 3 to rotate in the valve body 1, and the fluid deflection adjusts the medium flowing in the pipeline.

[0035] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A new type of molten urine inlet and outlet jacketed ball valve, comprising a valve body (1) and a valve stem (2), characterized in that: A ball (3) is rotatably arranged in the valve body (1), the bottom end of the valve stem (2) is fixedly mounted on the top surface of the ball (3), a hard valve seat (4) is fixedly mounted in the valve body (1), a movable opening (5) is provided on the side of the hard valve seat (4) close to the ball (3), a soft valve seat (6) is slidably arranged on the movable opening (5) of the hard valve seat (4), the movable opening (5) and the soft valve seat (6) are both arranged in annular shapes, and an elastic compensation device (7) is provided on the side of the soft valve seat (6) away from the ball (3); The elastic compensation device (7) is made of zinc metal material into a semicircular ring-shaped compensation device, and the size of the elastic compensation device (7) is adapted to the inner diameter of the movable opening (5); The ball (3) is made of 316L and its surface is hardened. The ball (3) fits with the hard valve seat (4) and the surface of the ball (3) fits with the side of the soft valve seat (6).

2. According to the novel structure of the molten urine inlet and outlet jacket ball valve of claim 1, it is characterized in that: The sealing part material of the hard valve seat (4) is made of duplex stainless steel that has been heat-treated, and the material of the soft valve seat (6) is PTFE.

3. According to the novel structure of the molten urine inlet and outlet jacket ball valve of claim 1, it is characterized in that: The size of the soft valve seat (6) is compatible with the size of the movable port (5).

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