Valve core structure of flash control valve

Abstract

The application provides a valve core structure of a flash control valve, comprising a valve core head made of ceramic material, the valve core head comprising a core head part and a core connecting part; an annular receiving groove is arranged on the outer side of the core connecting part; an annular receiving groove is arranged on the outer side of the valve rod; an upper flange is arranged on the upper part of the receiving part body, and a lower flange is arranged on the lower part of the receiving part body; an upper flange is arranged on the upper part of the positioning part body, and a lower flange is arranged on the lower part of the positioning part body; a clamping screw passes through the lateral positioning through hole and the lateral receiving hole in sequence; a receiving groove is arranged on the bottom surface of the valve core sleeve, and the block assembly can be inserted into the receiving groove; a fastening screw passes through the sleeve top through hole and the top positioning hole in sequence; and the fastening screw passes through the sleeve top through hole and the top receiving hole in sequence. The application is a valve core structure of a flash control valve which is convenient to process, not easy to be corroded and not easy to crack.

Description

Technical Field

[0001] The present invention relates to the technical field of valve structures, in particular to a valve core structure of a flash evaporation control valve. Background Art

[0002] In the era of major energy transformation, nickel, as the third metal under electrification, will see explosive growth in nickel used for power batteries along with the outbreak of terminal demand for new energy vehicles and the gradual advancement of high-nickel technology. As an important raw material supply source for battery-grade nickel sulfate, the high-pressure acid leaching hydrometallurgy will play an important role in the nickel industry chain in the new energy era in the future. The flash evaporation control valve matched with the discharge of the horizontal autoclave for high-pressure acid leaching smelting is the most critical flow control valve in the device, and its service performance directly affects the operation and stability of the device. The acidic pulp material in the medium of high-pressure acid leaching has the working condition characteristics of strong abrasiveness, strong corrosion, easy crystallization, high solid content, high flow rate and severe scouring. Since the valve core head of the existing flash evaporation control valve is made of hard alloy, the problem in the use of the flash evaporation control valve is that the high-temperature acidic pulp material coming out of the reaction kettle generates flash evaporation under the action of high pressure difference, and the valve core assembly of the flash evaporation control valve is extremely prone to being scrapped due to scouring and cavitation by the high-speed solid-containing acidic pulp material. As shown in Figure 1 , the existing valve core assembly of the flash evaporation control valve comprises a hard alloy valve core head 10, a connecting joint 20 and a valve rod 30, the upper end of the connecting joint 20 is in threaded connection with the valve rod 30, the lower end of the connecting joint 20 is in threaded connection with the hard alloy valve core head 10, and a pin 40 connects the upper end of the connecting joint 20 and the valve rod 30 in series. Therefore, in the existing valve core assembly, internal threads need to be arranged on both the valve rod and the hard alloy valve core head, which makes the processing difficulty of the valve core assembly relatively high. How to design a valve core structure that is easy to process, not easy to be corroded and not easy to crack is a problem to be solved by those skilled in the art. Summary of the Invention

[0003] In view of the above shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a valve core structure of a flash evaporation control valve that is easy to process, not easy to be corroded and not easy to crack.

[0004] To achieve the above and other related objectives, the present invention provides a valve core structure of a flash evaporation control valve, comprising:

[0005] A valve core head, the valve core head is made of ceramic material, the valve core head comprises a core body head part and a core body connecting part connected with the upper end of the core body head part; along the circumferential direction of the outer side surface of the core body connecting part, a core body annular receiving groove is arranged;

[0006] A valve rod, along the circumferential direction of the outer side surface of the valve rod, a rod body annular receiving groove is arranged; the valve rod is located at the upper part of the core body connecting part;

[0007] The receiving and fixing block includes a receiving body, an upper receiving flange, and a lower receiving flange. The receiving body has a semi-circular annular structure. The upper receiving flange is located on the upper part of the inner circumferential surface of the receiving body, and the lower receiving flange is located on the lower part of the inner circumferential surface of the receiving body. A lateral receiving hole is provided on the receiving plane of the receiving body. A top receiving hole is provided on the top surface of the receiving body. The upper receiving flange is inserted into the annular receiving groove of the rod body, and the lower receiving flange is inserted into the annular receiving groove of the core body. The inner circumferential surface of the receiving body contacts the outer surface of the valve stem, and the inner circumferential surface of the receiving body contacts the outer surface of the core connecting part.

[0008] The positioning and fixing block includes a positioning part body, an upper positioning flange, and a lower positioning flange. The positioning part body has a semi-circular annular structure. The upper positioning flange is located on the upper part of the inner circumferential surface of the positioning part body, and the lower positioning flange is located on the lower part of the inner circumferential surface of the receiving part body. A lateral positioning through hole is provided on the positioning plane of the positioning part body. A top positioning hole is provided on the top surface of the positioning part body. The upper positioning flange is inserted into the annular receiving groove of the rod body, and the lower positioning flange is inserted into the annular core body. In the receiving groove, the inner circumferential surface of the positioning part body contacts the outer surface of the valve stem, and the inner circumferential surface of the positioning part body contacts the outer surface of the core connecting part; the positioning plane of the positioning part body contacts the receiving plane of the receiving part body; the clamping screw passes through the lateral positioning through hole and the lateral receiving hole in sequence, connecting the positioning fixing block and the receiving fixing block in series, the positioning fixing block and the receiving fixing block constitute a block assembly, and the top surface of the receiving part body is coplanar with the top surface of the positioning part body;

[0009] A valve core sleeve has a receiving groove on its bottom surface, into which the block assembly can be inserted. The bottom surface of the receiving groove contacts the top surface of the receiving part body and the top surface of the positioning part body. The sidewall of the receiving groove contacts the outer peripheral surface of the block assembly. The top surface of the valve core sleeve has a top through hole. Fastening screws pass through the top through hole and the top positioning hole in sequence to connect the valve core sleeve and the positioning fixing block in series. Fastening screws also pass through the top through hole and the top receiving hole in sequence to connect the valve core sleeve and the receiving fixing block in series.

[0010] Preferably, the lower end of the core head is inverted teardrop shape.

[0011] Preferably, an intermediate buffer pad is provided between the bottom surface of the valve stem and the top surface of the core connecting part.

[0012] Preferably, the valve core structure of the flash control valve further includes a supporting buffer pad; the bottom surface of the receiving fixing block, the bottom surface of the positioning fixing block, and the bottom surface of the valve core sleeve are on the same plane; the supporting buffer pad is provided between the bottom surface of the receiving fixing block and the top surface of the core head; the supporting buffer pad is provided between the bottom surface of the positioning fixing block and the top surface of the core head; the supporting buffer pad is provided between the bottom surface of the valve core sleeve and the top surface of the core head.

[0013] Preferably, the lower wall of the annular receiving groove of the rod is inclined relative to the horizontal direction; the lower bottom surface of the upper flange of the receiving part is an inclined surface, and the lower bottom surface of the upper flange of the receiving part contacts the lower wall of the annular receiving groove of the rod; the lower bottom surface of the upper flange of the positioning part is an inclined surface, and the lower bottom surface of the upper flange of the positioning part contacts the lower wall of the annular receiving groove of the rod.

[0014] Preferably, the cross-sectional dimensions of the annular core receiving groove decrease sequentially along the direction extending from the opening of the groove towards the bottom surface of the annular core receiving groove.

[0015] Preferably, the ceramic material is silicon carbide ceramic.

[0016] Preferably, the valve stem, the receiving and fixing block, the positioning and fixing block, the valve core sleeve, the clamping screw, and the fastening screw are all made of titanium alloy; the outer circumferential surface of the valve core sleeve is coated with titanium oxide.

[0017] As described above, the valve core structure of the flash control valve of the present invention has the following beneficial effects:

[0018] In the valve core structure of the flash control valve of the present invention, after the receiving fixing block and the positioning fixing block clamp the valve stem and the valve core head, the clamping screw locks and fixes the receiving fixing block and the positioning fixing block. The outside of the receiving fixing block and the positioning fixing block is then held by the valve core sleeve and locked with fastening screws. Compared with the existing valve core assembly, the valve stem and the valve core head of the valve core structure of the present invention do not require thread machining, reducing the difficulty of part machining. Since the valve core head made of ceramic material is wrapped inside the receiving fixing block and the positioning fixing block, when the part deforms under hot conditions, the valve core head only bears the load of the external receiving fixing block. The valve core head does not bear internal compressive stress due to the thermal expansion of the positioning and fixing block, thus the valve core structure is suitable for ceramic materials with high hardness and brittleness. The valve core structure of the flash control valve of the present invention avoids the risk of valve core head cracking caused by internal compression due to thermal expansion of the connection joint in the valve core assembly of existing flash control valves. The ceramic valve core head can meet the stringent requirements of strong corrosion, high flow rate and severe scouring of high temperature acidic mineral slurry materials under flash conditions. The present invention is a valve core structure of a flash control valve that is easy to process, not easily corroded and not easily cracked. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the valve core assembly of an existing flash control valve.

[0020] Figure 2 This is a side view of the valve core structure of the flash control valve in this embodiment.

[0021] Figure 3 This is a three-dimensional structural diagram of the valve core structure of the flash control valve in this embodiment.

[0022] Figure 4 This is a schematic diagram of the internal three-dimensional structure of the valve core structure of the flash control valve in this embodiment without the positioning and fixing block.

[0023] Figure 5 yes Figure 4 An enlarged structural diagram of point A.

[0024] Figure 6 This is a three-dimensional structural diagram of the top of the valve core sleeve of the flash control valve in this embodiment.

[0025] Figure 7 This is a schematic diagram of the internal three-dimensional structure of the valve core sleeve of the flash control valve in this embodiment.

[0026] Figure 8 This is a three-dimensional structural diagram of the valve core structure of the flash control valve in this embodiment without the valve core sleeve.

[0027] Figure 9This is a schematic diagram of the internal three-dimensional structure of the valve core structure of the flash control valve in this embodiment when the positioning and fixing blocks and the receiving and fixing blocks are connected.

[0028] Figure 10 This is a three-dimensional structural diagram of the receiving and fixing block of the valve core structure of the flash control valve in this embodiment.

[0029] Figure 11 This is a three-dimensional structural diagram of the positioning and fixing block of the valve core structure of the flash control valve in this embodiment.

[0030] Figure 12 This is a side view of the valve stem structure of the valve core structure of the flash control valve in this embodiment.

[0031] Figure 13 This is a schematic diagram of the internal three-dimensional structure of the valve core structure of the flash control valve in this embodiment, when the fastening screws connect the valve core sleeve and the positioning fixing block.

[0032] Figure 14 This is a schematic diagram of the valve core head of the flash control valve in this embodiment.

[0033] Figure 15 This is a schematic diagram of the structure of the flash control valve in this embodiment when the valve core structure is set above the valve seat.

[0034] Figure 16 This is a schematic diagram of the valve core structure of the flash control valve in this embodiment when it is connected to the connecting block.

[0035] Figure 17 This is a schematic diagram of the lower end of the valve core head of an existing flash control valve valve core assembly.

[0036] Explanation of icon numbers

[0037] 10 Carbide valve core head

[0038] 11. Lower end of valve core head

[0039] 20 Connecting connector

[0040] 30 Valve stem

[0041] 40 pins

[0042] 100 Valve Core Head

[0043] 110 Core Head

[0044] 111 The lower end of the core head

[0045] 120 Core Connector

[0046] 121 Core Annular Receiving Groove

[0047] 200 valve stem

[0048] 210 Annular Receiving Groove of Rod

[0049] 211 Lower groove wall of the annular receiving groove of the rod body

[0050] 300 Supporting Fixing Block

[0051] 310 Receiving part body

[0052] 311 Lateral receiving hole

[0053] 312 Top receiving hole

[0054] 320 Upper flange of the receiving part

[0055] 330 Support flange

[0056] 400 positioning and fixing block

[0057] 410 Positioning Unit Body

[0058] 411 Lateral positioning through hole

[0059] 412 Top positioning hole

[0060] 420 Positioning part upper flange

[0061] 430 Lower flange of positioning part

[0062] 500 Valve Core Sleeve

[0063] 510 Storage Slot

[0064] 511 The bottom surface of the storage slot

[0065] 520 Sleeve Top Through Hole

[0066] 600 Fastening Screws

[0067] 710 Intermediate Buffer Pad

[0068] 720 Supporting cushioning pad

[0069] 800 clamping screw

[0070] 910 Connector Block

[0071] 920 Valve Cover

[0072] 930 valve seat Detailed Implementation

[0073] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0074] Please refer to the accompanying drawings. It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of the invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the disclosed technical content. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and are not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0075] like Figures 2 to 16 As shown, the valve core structure of the flash control valve in this embodiment includes:

[0076] The valve core head 100 is made of ceramic material. The valve core head 100 includes a core head 110 and a core connecting part 120 connected to the upper end of the core head 110. A core annular receiving groove 121 is provided along the circumference of the outer side of the core connecting part 120.

[0077] The valve stem 200 has an annular receiving groove 210 along the circumference of its outer side surface; the valve stem 200 is located above the core connecting part 120.

[0078] The receiving and fixing block 300 includes a receiving body 310, an upper receiving flange 320, and a lower receiving flange 330. The receiving body 310 has a semi-circular annular structure. The upper receiving flange 320 is provided on the upper part of the inner circumferential surface of the receiving body 310, and the lower receiving flange 330 is provided on the lower part of the inner circumferential surface of the receiving body 310. A lateral receiving hole 311 is provided on the receiving plane of the receiving body 310. A top receiving hole 312 is provided on the top surface of the receiving body 310. The upper receiving flange 320 is inserted into the rod annular receiving groove 210, and the lower receiving flange 330 is inserted into the core annular receiving groove 121. The inner circumferential surface of the receiving body 310 contacts the outer surface of the valve stem 200, and the inner circumferential surface of the receiving body 310 contacts the outer surface of the core connecting part 120.

[0079] The positioning and fixing block 400 includes a positioning part body 410, a positioning part upper flange 420, and a positioning part lower flange 430. The positioning part body 410 has a semi-circular annular structure. The upper flange 420 is provided on the upper part of the inner circumferential surface of the positioning part body 410, and the lower flange 430 is provided on the lower part of the inner circumferential surface of the receiving part body 310. A lateral positioning through hole 411 is provided on the positioning plane of the positioning part body 410. A top positioning hole 412 is provided on the top surface of the positioning part body 410. The positioning part upper flange 420 is inserted into the rod body annular receiving groove 210, and the positioning part lower flange 430 is inserted into the core. In the annular receiving groove 121, the inner circumferential surface of the positioning part body 410 contacts the outer surface of the valve stem 200, and the inner circumferential surface of the positioning part body 410 contacts the outer surface of the core connecting part 120; the positioning plane of the positioning part body 410 contacts the receiving plane of the receiving part body 310; the clamping screw 800 passes through the lateral positioning through hole 411 and the lateral receiving hole 311 in sequence, connecting the positioning fixing block 400 and the receiving fixing block 300 in series, and the positioning fixing block 400 and the receiving fixing block 300 constitute a block assembly, and the top surface of the receiving part body 310 is coplanar with the top surface of the positioning part body 410;

[0080] The valve core sleeve 500 has a receiving groove 510 on its bottom surface, into which the block assembly can be inserted. The bottom surface 511 of the receiving groove contacts the top surface of the receiving part body 310 and the top surface of the positioning part body 410. The side wall of the receiving groove 510 contacts the outer peripheral surface of the block assembly. The top surface of the valve core sleeve 500 has a top through hole 520. Fastening screws 600 pass through the top through hole 520 and the top positioning hole 412 in sequence to connect the valve core sleeve 500 and the positioning fixing block 400 in series. Fastening screws 600 pass through the top through hole 520 and the top receiving hole 312 in sequence to connect the valve core sleeve 500 and the receiving fixing block 300 in series.

[0081] In the valve core structure of the flash control valve of the present invention, after the receiving fixing block 300 and the positioning fixing block 400 clamp the valve stem 200 and the valve core head 100, the clamping screw 800 locks and fixes the receiving fixing block 300 and the positioning fixing block 400. The outside of the receiving fixing block 300 and the positioning fixing block 400 is then held by the valve core sleeve 500 and locked by the fastening screw 600. Compared with the existing valve core assembly, the valve stem 200 and the valve core head 100 of the valve core structure of the present invention do not require thread machining, reducing the difficulty of part machining. Because the valve is made of ceramic material... The valve core 100 is enclosed within the receiving and fixing block 300 and the positioning and fixing block 400. Under hot working conditions, when the part deforms due to heat, the valve core 100 only bears the compressive stress caused by the thermal expansion of the external receiving and fixing block 300 and the positioning and fixing block 400. The valve core 100 does not bear the internal compressive stress. Therefore, this valve core structure can be used for ceramic materials with high hardness and brittleness. The external compressive stress borne by the ceramic valve core 100 tests the compressive strength of the material, while the internal compressive stress does not test the tensile strength of the material.

[0082] The valve core structure of the flash control valve of the present invention avoids the risk of cracking of the valve core head 100 caused by thermal expansion of the connection joint due to the valve core assembly of the existing flash control valve; the ceramic valve core head 100 can meet the stringent requirements of strong corrosion, high flow rate and severe scouring of high temperature acidic slurry materials under flash conditions.

[0083] This invention relates to a valve core structure for a flash control valve that is easy to process, resistant to corrosion, and not prone to cracking.

[0084] In this embodiment, the valve stem 200 of the valve core structure is connected to the connecting block 910, and the valve stem 200 passes through the valve cover 920. The lower end of the valve core structure is inserted into the valve seat 930.

[0085] like Figure 15 As shown, in this embodiment, the lower end 111 of the core head is an inverted teardrop shape. Figure 17 As shown, because the lower end 11 of the valve core head of the existing flash control valve includes a frustum-shaped structure 12 and a conical structure 13 connected to the lower end of the frustum-shaped structure 12, and the vertical height of the lower end 11 is greater than the vertical height of the lower end 111 of the core head in this embodiment, the lower end 11 of the existing valve core head cannot avoid the continuous, high-speed vertical impact of the medium on the valve core head, which will cause wear on the valve core head. Figure 13 and Figure 15As shown, the advantage of the inverted teardrop-shaped profile adopted in this embodiment is that after the medium flows through the throttling surface, it can be quickly discharged to the downstream of the valve, avoiding continuous and high-speed vertical impact of the medium on the valve core head 100, greatly reducing the wear of the valve core head 100 caused by scouring, and avoiding the risk of cracking or breaking off of the valve core head 100 due to continuous impact stress concentration, thereby significantly increasing the service life of the valve core head 100 and the entire valve.

[0086] like Figures 2 to 16 As shown, an intermediate buffer pad 710 is provided between the bottom surface of the valve stem 200 and the top surface of the core connecting part 120. The ceramic valve core head 100 is relatively brittle. By providing an intermediate buffer pad 710 between the valve stem 200 and the core connecting part 120, the wear of the valve stem 200 on the core connecting part 120 can be prevented.

[0087] The valve core structure of the flash control valve also includes a supporting buffer pad 720; the bottom surfaces of the receiving fixing block 300, the positioning fixing block 400, and the valve core sleeve 500 are on the same plane; a supporting buffer pad 720 is provided between the bottom surface of the receiving fixing block 300 and the top surface of the core head 110; a supporting buffer pad 720 is provided between the bottom surface of the positioning fixing block 400 and the top surface of the core head 110; a supporting buffer pad 720 is provided between the bottom surface of the valve core sleeve 500 and the top surface of the core head 110. The supporting buffer pad 720 prevents the receiving fixing block 300, the valve core sleeve 500 from directly contacting the core head 110, thus avoiding wear on the core head 110.

[0088] The lower groove wall 211 of the rod body annular receiving groove is inclined relative to the horizontal direction; the lower bottom surface of the upper flange 320 of the receiving part is a slope, and the lower bottom surface of the upper flange 320 of the receiving part contacts the lower groove wall 211 of the rod body annular receiving groove; the lower bottom surface of the upper flange 420 of the positioning part is a slope, and the lower bottom surface of the upper flange 420 of the positioning part contacts the lower groove wall 211 of the rod body annular receiving groove. The rod body annular receiving groove 210 is a groove with an incline, which facilitates the insertion of the upper flange 320 of the receiving part and the upper flange 420 of the positioning part into the rod body annular receiving groove 210.

[0089] Along the direction extending from the opening of the annular receiving groove 121 towards the bottom surface of the annular receiving groove 121, the cross-sectional dimensions of the annular receiving groove 121 decrease sequentially. This structure facilitates the insertion of the lower flange 330 of the receiving part and the lower flange 430 of the positioning part into the annular receiving groove 121.

[0090] The ceramic material is silicon carbide ceramic. The Vickers hardness of the ceramic valve core 100 is greater than or equal to 2100, indicating high hardness, approaching that of diamond. The thermal conductivity of the ceramic valve core 100 is 100 W / mK, demonstrating excellent thermal performance. The valve stem 200, receiving and fixing block 300, positioning and fixing block 400, valve core sleeve 500, clamping screw 800, and fastening screw 600 are all made of titanium alloy. The outer circumference of the valve core sleeve 500 is coated with a titanium oxide coating. This meets the stringent requirements of high-temperature acidic mineral slurry materials under flash evaporation conditions, which involve strong corrosion, high flow rate, and intense scouring.

[0091] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A valve core structure for a flash control valve, characterized in that, include: A valve core head (100) is made of ceramic material. The valve core head (100) includes a core head (110) and a core connecting part (120) connected to the upper end of the core head (110). A core annular receiving groove (121) is provided along the circumferential direction of the outer side surface of the core connecting part (120). The valve stem (200) has an annular receiving groove (210) along the circumference of its outer side surface; The valve stem (200) is located above the core connecting part (120); The receiving and fixing block (300) includes a receiving body (310), an upper receiving flange (320), and a lower receiving flange (330); the receiving body (310) has a semi-circular annular structure, the upper receiving flange (320) is provided on the upper part of the inner circumferential surface of the receiving body (310), and the lower receiving flange (330) is provided on the lower part of the inner circumferential surface of the receiving body (310); the receiving plane of the receiving body (310) is provided with a lateral receiving hole (3). 11); The top surface of the receiving part body (310) is provided with a top receiving hole (312); the upper flange (320) of the receiving part is inserted into the annular receiving groove (210) of the rod body, the lower flange (330) of the receiving part is inserted into the annular receiving groove (121) of the core body, the inner circumferential surface of the receiving part body (310) is in contact with the outer surface of the valve stem (200), and the inner circumferential surface of the receiving part body (310) is in contact with the outer surface of the core connecting part (120); The positioning and fixing block (400) includes a positioning part body (410), a positioning part upper flange (420), and a positioning part lower flange (430); the positioning part body (410) has a semi-circular annular structure, the positioning part upper flange (420) is provided on the upper part of the inner circumferential surface of the positioning part body (410), and the positioning part lower flange (430) is provided on the lower part of the inner circumferential surface of the receiving part body (310); a lateral positioning through hole (411) is provided on the positioning plane of the positioning part body (410); a top positioning hole (412) is provided on the top surface of the positioning part body (410); the positioning part upper flange (420) is inserted into the rod body annular receiving groove (210), and the positioning part lower flange (430) is inserted into the core body annular groove. In the receiving groove (121), the inner circumferential surface of the positioning part body (410) contacts the outer surface of the valve stem (200), and the inner circumferential surface of the positioning part body (410) contacts the outer surface of the core connecting part (120); the positioning plane of the positioning part body (410) contacts the receiving plane of the receiving part body (310); the clamping screw (800) passes through the lateral positioning through hole (411) and the lateral receiving hole (311) in sequence, connecting the positioning fixing block (400) and the receiving fixing block (300) in series, the positioning fixing block (400) and the receiving fixing block (300) constitute a block assembly, and the top surface of the receiving part body (310) is coplanar with the top surface of the positioning part body (410); A valve core sleeve (500) has a receiving groove (510) on its bottom surface, into which the block assembly can be inserted; the bottom surface (511) of the receiving groove contacts the top surface of the receiving part body (310), the bottom surface (511) of the receiving groove contacts the top surface of the positioning part body (410), and the sidewall of the receiving groove (510) contacts the outer peripheral surface of the block assembly; the valve core sleeve (500) The top surface of the sleeve is provided with a top through hole (520); the fastening screw (600) passes through the top through hole (520) and the top positioning hole (412) in sequence, connecting the valve core sleeve (500) and the positioning fixing block (400) in series; the fastening screw (600) passes through the top through hole (520) and the top receiving hole (312) in sequence, connecting the valve core sleeve (500) and the receiving fixing block (300) in series.

2. The valve core structure of the flash control valve according to claim 1, characterized in that: The lower end (111) of the core head is an inverted teardrop shape.

3. The valve core structure of the flash control valve according to claim 1, characterized in that: An intermediate buffer pad (710) is provided between the bottom surface of the valve stem (200) and the top surface of the core connecting part (120).

4. The valve core structure of the flash control valve according to claim 1, characterized in that: It also includes a supporting buffer pad (720); the bottom surface of the receiving fixing block (300), the bottom surface of the positioning fixing block (400) and the bottom surface of the valve core sleeve (500) are on the same plane; the supporting buffer pad (720) is provided between the bottom surface of the receiving fixing block (300) and the top surface of the core head (110); the supporting buffer pad (720) is provided between the bottom surface of the positioning fixing block (400) and the top surface of the core head (110); the supporting buffer pad (720) is provided between the bottom surface of the valve core sleeve (500) and the top surface of the core head (110).

5. The valve core structure of the flash control valve according to claim 1, characterized in that: The lower groove wall (211) of the rod body annular receiving groove is inclined relative to the horizontal direction; the lower bottom surface of the upper flange (320) of the receiving part is an inclined surface, and the lower bottom surface of the upper flange (320) of the receiving part is in contact with the lower groove wall (211) of the rod body annular receiving groove; the lower bottom surface of the upper flange (420) of the positioning part is an inclined surface, and the lower bottom surface of the upper flange (420) of the positioning part is in contact with the lower groove wall (211) of the rod body annular receiving groove.

6. The valve core structure of the flash control valve according to claim 1, characterized in that: Along the direction extending from the opening of the annular core receiving groove (121) toward the bottom surface of the annular core receiving groove (121), the dimensions of the cross-section of the annular core receiving groove (121) decrease sequentially.

7. The valve core structure of the flash control valve according to claim 1, characterized in that: The ceramic material is silicon carbide ceramic.

8. The valve core structure of the flash control valve according to claim 1, characterized in that: The valve stem (200), the receiving and fixing block (300), the positioning and fixing block (400), the valve core sleeve (500), the clamping screw (800), and the fastening screw (600) are all made of titanium alloy; the outer circumferential surface of the valve core sleeve (500) is coated with titanium oxide.

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