Anti-crystallization heat preservation jacket slag discharge valve

Abstract

The invention relates to the technical field of valves and discloses an anti-crystallization heat preservation jacket slag discharge valve which comprises a valve body, a small-diameter channel and a large-diameter channel are arranged in the valve body, the center of the small-diameter channel and the center of the large-diameter channel are correspondingly communicated, a valve seat is arranged on the side, facing the large-diameter channel, of the small-diameter channel, and a valve core is arranged on the valve seat. A ball body is arranged on the side, facing the interior of the small-diameter channel, of the large-diameter channel, overflowing holes are formed in the ball body, the ball body is attached to the valve seat, an inner cavity of the valve is free of dead corners and adopts linear arc transition, media are unobstructed without resistance, small-particle and slag media cannot be accumulated and blocked, and normal work of the valve is guaranteed. In the opening and closing process of the ball body, the scraper can automatically scrape off particles and residues on the spherical surface, the sealing surface of the valve seat is protected against damage, the heat preservation jacket is arranged outside the valve body, high-temperature steam or heat conduction oil is introduced, and it is guaranteed that a medium easy to crystallize has flowability.

Description

Technical Field

[0001] The invention relates to the technical field of valves, and in particular to an anti-crystallization thermal insulation jacket slag discharge valve. Background Art

[0002] The ball valve has a simple structure, small installation space, good sealing performance, and fast opening and closing. It only needs to rotate 90 degrees to complete the opening and closing. It is widely used in long-distance oil and chemical pipelines. However, the existing conventional ball valve has an inherent defect, that is, a dead angle in the inner cavity is formed between the ball and the two sealing valve seats. During the opening and closing process, the medium enters the inner cavity. For the medium containing particles and slag, it will precipitate and accumulate in the dead angle of the inner cavity. After the valve is used for a long time, the inner cavity of the valve is gradually filled, causing the ball to be locked and unable to rotate. The valve stem is twisted under the impact of the actuator torque, and the seal fails and the valve is damaged. Therefore, conventional ball valves can only be used for clean media. Figure 1 For the medium with more severe working conditions, such as molten salt, hydrocarbons, esters, ethers, etc., which is easy to crystallize and contains particles, conventional ball valves cannot be used at all. In order to give full play to the advantages and characteristics of ball valves, a ball valve with new structure and new functions needs to be developed to replace it. Summary of the invention

[0003] Purpose of the invention: The technical problem to be solved by the present invention is to provide an anti-crystallization thermal insulation jacket slag discharge valve, which solves the problem of dead corner accumulation in the inner cavity of a conventional ball valve.

[0004] Technical Solution

[0005] To solve the above problems, the technical solution provided by the present invention is:

[0006] A crystallization-resistant thermal insulation jacket slag discharge valve comprises a valve body, a small-diameter channel and a large-diameter channel are arranged in the valve body, the small-diameter channel and the large-diameter channel are connected to each other at the center, a valve seat is provided on the side of the small-diameter channel facing the large-diameter channel, a sphere is provided on the side of the large-diameter channel facing the inside of the small-diameter channel, a flow hole is provided in the sphere, the sphere is fitted with the valve seat, an outward-expanding inclined structure is provided on the side of the valve seat facing the large-diameter channel, the outward-expanding inclined structure is fitted with the surface of the sphere, and a valve stem is connected to the valve body.

[0007] Furthermore, a push ring is provided between the valve seat and the small-diameter channel, a butterfly spring is provided between the push ring and the end face of the small-diameter channel, a sealing ring is provided between the push ring and the valve seat, and a first dust ring abutting against the valve seat is provided on the inner side of the small-diameter channel.

[0008] Furthermore, a valve cover is provided at the end of the large-diameter channel, and the valve cover extends into the large-diameter channel. The valve cover structure located inside the large-diameter channel is an arc-shaped transition structure.

[0009] Furthermore, a scraper structure that fits the sphere is provided on the inclined outwardly expanding structure of the valve seat.

[0010] Furthermore, the upper and lower sides of the sphere are provided with connecting grooves, and the valve stem is connected to the connecting groove on the upper side of the sphere.

[0011] Furthermore, a bottom cover is provided at the bottom of the valve body, and a bottom cover sleeve is provided on the bottom cover and is inserted into a connecting groove at the lower side of the sphere.

[0012] Furthermore, a second dustproof ring cooperating with the sphere is provided on the bottom cover sleeve, and a third dustproof ring cooperating with the sphere is provided on the valve stem.

[0013] Furthermore, an upper cover is fixedly provided on the upper side of the valve body, the valve stem is rotatably provided inside the upper cover, a pneumatic actuator is provided on the upper side of the upper cover, and the pneumatic actuator is connected to the valve stem.

[0014] Furthermore, a packing, a packing sleeve and a packing pressure plate are sequentially arranged in the upper cover around the valve stem.

[0015] Furthermore, an insulation jacket is provided on the outside of the valve body, a heating medium inlet interface is provided on the upper side of one side of the insulation jacket, an insulation medium outlet interface is provided on the lower side of the other side of the insulation jacket, and a drain plug is provided on the lower side of the insulation jacket.

[0016] Beneficial Effects

[0017] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0018] The technical solution provided by the present invention adopts a single valve seat bidirectional sealing structure design, which reduces the number of rear valve seats to meet the same function. The medium can be sealed in both directions. There is no dead angle in the valve cavity. The inner cavity adopts a linear arc transition, so the medium can flow smoothly without resistance. Particles and slag media will not accumulate and clog, ensuring the normal operation of the valve. The valve seat adopts a scraper-type structure design. During the opening and closing process of the sphere, the scraper can automatically scrape off the particles and slag on the spherical surface to protect the sealing surface of the valve seat from damage. The valve body is wrapped with an insulation jacket. When used in harsh occasions where the medium is easy to crystallize and contains particles, a circulating heating medium is introduced into the insulation jacket through the heating medium inlet and outlet joints. The heat conduction effect makes the temperature of the valve cavity higher than the crystallization temperature of the medium, ensuring that the medium does not crystallize and has smoothness, and ensuring that the valve is not blocked and operates normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of dead angle accumulation of a conventional ball valve in the background technology of the present invention;

[0020] Figure 2 It is a structural cross-sectional view of Embodiment 1 of the present invention;

[0021] Figure 3 It is a front view of embodiment 1 of the present invention;

[0022] Figure 4 for Figure 2 The enlarged schematic diagram of point I in the middle;

[0023] Figure 5 for Figure 2 The enlarged schematic diagram of II in the middle;

[0024] Figure 6 for Figure 2 Enlarged schematic diagram of point III in the middle. DETAILED DESCRIPTION

[0025] In order to make the technical solution of the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Example 1

[0027] Combined with Figure 2-6 A crystallization-resistant thermal insulation jacket slag discharge valve comprises a valve body 1, wherein two channels with different inner diameters are arranged in the valve body 1, namely a small-diameter channel 101 with a smaller inner diameter and a large-diameter channel 102 with a larger inner diameter, the small-diameter channel 101 and the large-diameter channel 102 are arranged correspondingly in the center, the center lines of the small-diameter channel 101 and the large-diameter channel 102 overlap, the small-diameter channel 101 and the large-diameter channel 102 are stepped structures, and the small-diameter channel 101 and the large-diameter channel 102 are used for the flow of the medium passing through the valve body 1.

[0028] A valve seat 13 is provided on the channel wall of the small-diameter channel 101 facing the large-diameter channel 102. The side of the valve seat 13 facing the large-diameter channel 102 is an outwardly expanded inclined structure, and the other side of the valve seat 13 faces the small-diameter channel 101, and the end faces of the small-diameter channel 101 and the valve seat 13 facing each other are parallel planes.

[0029] A gap is provided between the end face of the valve seat 13 facing the small-diameter channel 101 and the end face of the small-diameter channel 101 facing the valve seat 13, a push ring 11 is provided in the gap between the small-diameter channel 101 and the valve seat, a butterfly spring 10 is provided between the end wall of the push ring 11 on one side facing the small-diameter channel 101 and the end face of the small-diameter channel 101, a sealing ring 12 is provided on the side of the push ring 11 facing the valve seat 13, an annular protrusion is provided on the push ring 11, passing through the sealing ring 12 and abutting against the valve seat 13, and a first dust ring 9 is provided at the contact position between the inner surface of the small-diameter channel 101 and the valve seat 13.

[0030] When the valve body 1 is in use, the medium inside it flows from the small-diameter channel 101 to the large-diameter channel 102. The dust ring design is adopted at the entrance of the valve seat 13, which can effectively prevent medium particles and slag from entering the valve seat spring cavity to prevent accumulation and crushing of the spring and locking of the valve seat.

[0031] A sphere 6 is provided on the side of the large diameter channel 102 facing the small diameter channel 101, and connecting grooves are provided on the upper and lower sides of the sphere 6. A bottom cover 5 inserted into the large diameter channel 102 is provided on the valve body 1, and the bottom cover 5 is installed on the valve body 1 by screws. A bottom cover sleeve is provided on the bottom cover 5, and the bottom cover sleeve of the bottom cover 5 is inserted into the large diameter channel 102 and into the connecting groove on the lower side of the sphere 6. The bottom cover sleeve on the bottom cover 5 is provided with a second dust ring 14 that is matched with the connecting groove on the lower side of the sphere 6.

[0032] The valve stem 16 drives the ball 6 to rotate, thereby controlling the connection and blocking of the internal channel of the valve body 1. The ball 6 rotates synchronously with the valve stem 16, and the ball 6 rotates on the bottom cover sleeve.

[0033] A valve stem 16 is connected to the connecting groove on the upper side of the sphere 6. A third dust ring 15 is provided on the valve stem 16 to cooperate with the connecting groove on the upper side of the sphere 6. A dust ring design is adopted at the connection groove between the bottom cover sleeve, the valve stem 16 and the sphere 6 to prevent medium particles from entering the sleeve, preventing the valve stem from being locked and the torque from increasing sharply.

[0034] The side of the ball 6 close to the small-diameter channel 101 is arranged in the valve seat 13. Since the side of the valve seat 13 facing the large-diameter channel 102 is an outward-expanding inclined structure, the ball 6 is a spherical or quasi-spherical structure. The ball 6 and the valve seat 13 are arranged correspondingly, and the side portion of the ball 6 can be installed in the valve seat 13. At this time, the upper and lower surfaces of the ball 6 are in contact with the outward-expanding inclined surface of the valve seat 13 facing the large-diameter channel 102. A scraper structure 131 is provided at the position where the outward-expanding inclined surface of the valve seat 13 contacts the surface of the ball 6. The scraper structure 131 abuts against the upper and lower surfaces of the ball 6. The scraper structure 131 is preferably an arc-shaped scraper corresponding to the surface of the ball 6. During the opening and closing rotation of the ball 6, the scraper can automatically scrape off particles and residues on the spherical surface of the ball to protect the sealing surface of the valve seat from being damaged.

[0035] An upper cover 17 is provided on the upper side of the valve body 1, and a valve stem 16 is installed in the upper cover 1. The upper cover 17 and the valve body 1 are fixed together by screw fitting. A bracket 21 is fixed on the upper cover 17 by screw fitting. A pneumatic actuator 22 is connected to the upper side of the bracket 21. The driving interface of the pneumatic actuator 22 is fixedly connected to the valve stem 16 in the bracket 21. The user drives the pneumatic actuator 22 to drive the valve stem 16 to rotate and then drives the ball 6 to rotate. The pneumatic actuator 22 is used for operation, which has a high safety factor and a large output torque, and is particularly suitable for the cutoff and opening and closing of granular and slag media.

[0036] A through flow hole is provided in the sphere 6. When the sphere 6 rotates to a position where the through flow hole is connected to the large diameter channel 102 and the small diameter channel in the valve body 1, the medium in the valve body 1 can flow normally. When the sphere 6 rotates to a position where the through flow hole is perpendicular to the large diameter channel 102 and the small diameter channel 101 in the valve body 1, the sphere 6 separates the large diameter channel 102 and the small diameter channel 101, and the large diameter channel 102 and the small diameter channel 101 are no longer connected.

[0037] A packing groove is provided in the upper cover 17 at the position where the valve stem 16 rotates, and the packing groove is filled with packing 18. After the packing groove is filled with packing 18, a packing sleeve 19 is provided on the packing 18, and a packing pressure plate 20 is also provided on the packing sleeve 19. The packing pressure plate 20 abuts against the packing sleeve 18, and the packing pressure plate 20 is fixedly installed on the upper cover 17 by screws. The sealing of the valve stem 16 can be ensured by the packing 18, the packing sleeve 19 and the packing pressure plate 20.

[0038] The valve body 1 is coated with an insulation jacket 7 on the outside, and the insulation jacket 7 is used to heat the valve body 1. The valve shape is designed to be wrapped with the insulation jacket. When used in harsh occasions where the medium is easy to crystallize and contains particles, circulating heating is introduced into the insulation jacket through the inlet and outlet joints of the heating medium. The medium is such as high-temperature steam, heat transfer oil, etc. The heat conduction effect makes the temperature of the valve cavity higher than the crystallization temperature of the medium, ensuring that the medium does not crystallize and has smoothness, and ensuring that the valve is not blocked and works normally.

[0039] A heating medium inlet interface 23 is provided on the upper side of one side of the insulation jacket 7, and a heating medium outlet interface 24 is provided on the lower side of the other side of the insulation jacket 7. The insulation medium enters the insulation jacket 7 from the heating medium inlet interface 23. After filling the entire insulation jacket 7, the insulation medium flows out from the insulation medium outlet interface 24. The heating medium inlet interface 23 and the insulation medium outlet interface 24 are respectively connected to the supply port and the recovery port of the insulation medium pipeline, thereby ensuring that the insulation medium with a constant temperature can continuously flow into the insulation jacket 7, and a drain plug 8 is provided on the lower side of the insulation jacket 7, and the drain plug 8 is used for draining the insulation jacket 7.

[0040] The inlet and outlet joints ensure that the heating medium enters from the top and exits from the bottom, effectively allowing the heating medium to circulate in the insulation jacket for heat supply, ensuring that the medium in the valve cavity flows smoothly without crystallization. When the valve is maintained, the insulation jacket can be drained and cleaned through the drain screw plug.

[0041] The valve body 1 is fixed with a valve cover 2 installed on the valve body 1 at the port in the large diameter channel 102 by screws 3, a sealing gasket 4 is provided between the valve cover 2 and the valve body 1, the valve cover 2 extends into the interior of the large diameter channel 102, and the structure of the valve cover 2 located inside the large diameter channel 102 is an arc-shaped transition structure, which facilitates the flow of the medium.

[0042] The valve body 1 adopts a single valve seat bidirectional sealing structure design, which reduces the rear valve seat to meet the same function. The medium can be sealed in both positive and negative directions. There is no dead angle in the valve cavity. The inner cavity adopts a linear arc transition. The medium flows smoothly without resistance. Particles and slag media will not accumulate and clog, ensuring the normal operation of the valve.

[0043] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An anti-crystallization thermal insulation jacket slag discharge valve, characterized in that: The utility model comprises a valve body, wherein a small-diameter channel and a large-diameter channel are arranged in the valve body, the centers of the small-diameter channel and the large-diameter channel are connected correspondingly, a valve seat is arranged on the side of the small-diameter channel facing the large-diameter channel, a sphere is arranged on the side of the large-diameter channel facing the inside of the small-diameter channel, a flow hole is arranged in the sphere, the sphere is fitted with the valve seat, an outward-expanding inclined structure is arranged on the side of the valve seat facing the large-diameter channel, the outward-expanding inclined structure is fitted with the surface of the sphere, and a valve stem is connected to the valve body.

2. The anti-crystallization thermal insulation jacket slag discharge valve according to claim 1, characterized in that: A push ring is provided between the valve seat and the small-diameter channel, a butterfly spring is provided between the push ring and the end surface of the small-diameter channel, a sealing ring is provided between the push ring and the valve seat, and a first dust ring abutting against the valve seat is provided on the inner side of the small-diameter channel.

3. The anti-crystallization thermal insulation jacket slag discharge valve according to claim 1, characterized in that: A valve cover is provided at the end of the large-diameter channel. The valve cover extends into the large-diameter channel. The valve cover structure located inside the large-diameter channel is an arc-shaped transition structure.

4. The anti-crystallization thermal insulation jacket slag discharge valve according to claim 1, characterized in that: The inclined outward expansion structure of the valve seat is provided with a scraper structure which fits the sphere.

5. The anti-crystallization thermal insulation jacket slag discharge valve according to claim 1, characterized in that: The upper and lower sides of the sphere are both provided with connecting grooves, and the valve stem is connected in the connecting groove on the upper side of the sphere.

6. The anti-crystallization thermal insulation jacket slag discharge valve according to claim 5, characterized in that: A bottom cover is provided at the bottom of the valve body, and a bottom cover sleeve is provided on the bottom cover and inserted into the connecting groove at the lower side of the sphere.

7. The anti-crystallization thermal insulation jacket slag discharge valve according to claim 6, characterized in that: The bottom cover shaft sleeve is provided with a second dustproof ring matched with the ball, and the valve stem is provided with a third dustproof ring matched with the ball.

8. The anti-crystallization thermal insulation jacket slag discharge valve according to claim 1, characterized in that: An upper cover is fixedly provided on the upper side of the valve body, the valve stem is rotatably provided inside the upper cover, a pneumatic actuator is provided on the upper side of the upper cover, and the pneumatic actuator is connected to the valve stem.

9. The anti-crystallization thermal insulation jacket slag discharge valve according to claim 8, characterized in that: A packing, a packing pressing sleeve and a packing pressing plate are sequentially arranged in the upper cover around the valve stem.

10. The anti-crystallization thermal insulation jacket slag discharge valve according to claim 1, characterized in that: A heat preservation jacket is arranged outside the valve body, a heating medium inlet interface is arranged on the upper side of one side of the heat preservation jacket, a heat preservation medium outlet interface is arranged on the lower side of the other side of the heat preservation jacket, and a drain screw plug is arranged on the lower side of the heat preservation jacket.

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