A crystallization-resistant V-type ball valve

Abstract

The utility model provides an anti-crystallization V-type ball valve, comprising a valve body, a V-type ball valve core arranged in a valve cavity of the valve body, and a valve seat arranged in the valve cavity and connected to the valve body, wherein the V-type ball valve core and the valve seat rotate in cooperation to conduct or cut off a fluid channel; a compression compensation device is arranged between the valve body and the valve seat, wherein the compression compensation device comprises an elastic member arranged between the valve body and the valve seat for generating an elastic force toward the V-type ball valve core on the valve seat; a scraper block is arranged on the contact surface between the valve seat and the V-type ball valve core; in this scheme, a compression compensation device is arranged between the valve body and the valve seat, wherein the compression compensation device comprises an elastic member between the valve body and the valve seat for generating an elastic force toward the V-type ball valve core on the valve seat, and due to the elastic force compensation effect of the elastic member, the valve seat is stably sealed for a long time in the process of sealing against the V-type ball valve core, and the position of the scraper block is compensated by the elastic member after wear, thereby ensuring the scraping effect of the scraper block and making the anti-crystallization performance of the ball valve effective for a long time.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to an anti-crystallization V-shaped ball valve. Background Art

[0002] V-type ball valve is a fixed ball valve and a single seat sealed ball valve. It has the best regulating performance among ball valves, and the flow characteristic is equal percentage, with an adjustable ratio of 100:1. There is a shearing effect between its V-shaped cut and the metal valve seat, which is particularly suitable for media containing fibers, tiny solid particles, slurry, etc.

[0003] In industrial production, urea and other easy-to-crystallize media are prone to crystallize at the sealing valve in the pipeline, causing blockage. The ball valve used in the existing pipeline generally has a scraper structure on the valve seat and the ball. For example, the utility model patent with publication number CN204961884U discloses a control ball valve suitable for easy-to-crystallize media occasions, which can scrape off the crystals attached to the surface of the ball, and the scraped crystals are carried out with the flow of liquid medium in the pipeline.

[0004] However, the scraper structure on the valve seat is prone to wear during long-term contact with the ball, and the scraping effect decreases after wear. Therefore, it is necessary to design a crystal scraping structure with wear compensation function to make the anti-crystallization performance of the ball valve effective for a long time. Utility Model Content

[0005] The purpose of the utility model is to overcome the shortcomings and deficiencies of the prior art and provide an anti-crystallization V-type ball valve. The technical solution adopted by the utility model is as follows:

[0006] An anti-crystallization V-type ball valve comprises: a valve body, wherein the valve body has a valve cavity and a fluid channel connected to the valve cavity; a V-type ball valve core arranged in the valve cavity of the valve body; a valve seat arranged in the valve cavity and connected to the valve body, the V-type ball valve core and the valve seat rotatably cooperate to conduct or cut off the fluid channel; a compression compensation device is arranged between the valve body and the valve seat, the compression compensation device comprises an elastic member arranged between the valve body and the valve seat to generate an elastic force on the valve seat toward the V-type ball valve core; a scraper block is arranged on the contact surface between the valve seat and the V-type ball valve core.

[0007] Preferably, the scraper block has a hexagonal cross section, and the scraper block is partially embedded in the valve seat so that at least three sides of the hexagonal cross section of the scraper block are in contact with the valve seat.

[0008] Preferably, the scraper block at least partially protrudes from the valve seat, and a flexible sealing portion cooperating with the scraper block and sealingly cooperating with the V-shaped ball valve core is provided on the valve seat.

[0009] Preferably, a first embedding groove is provided on the valve body, a second embedding groove is provided on the valve seat, and both ends of the elastic member are respectively embedded in the first embedding groove and the second embedding groove, so that when the valve seat contacts the V-shaped ball valve core to form a seal, it has a movement tendency toward the V-shaped ball valve core.

[0010] Preferably, an O-ring is embedded between the valve body and the side of the valve seat away from the compression compensation device.

[0011] As a preference, the valve stem further includes connecting the V-shaped ball valve core to the driving mechanism, a stuffing box and a stuffing gland are arranged between the valve stem and the valve body, and a shaft sleeve is arranged between the stuffing box and the V-shaped ball valve core on the outer periphery of the valve stem.

[0012] Preferably, the valve stem includes a first sealing section that cooperates with the stuffing box and the stuffing cover, and a second sealing section located between the first sealing section and the V-type ball valve core, a flange is arranged between the first sealing section and the second sealing section, and a sleeve is sleeved on the second sealing section and the upper end of the sleeve abuts against the flange.

[0013] Preferably, the sleeve is embedded in a first annular groove in the valve body, and the first annular groove is isolated from the valve cavity; multiple layers of sealing rings are stacked in the stuffing box, and a first sealing gasket is arranged at the bottom of the stuffing box, and the first sealing gasket is located on the upper surface of the flange.

[0014] Preferably, the valve stem also includes a third sealing section connected to a position below the V-shaped ball valve core, and the sleeve between the third sealing section and the valve body is embedded in a second annular groove of the valve body, and the second annular groove is isolated from the valve cavity.

[0015] Preferably, the lower end of the valve body is connected to the lower cover, and the lower cover and the valve body are matched in a stepped seal, and the first sealing step of the lower cover corresponds to the second sealing step of the valve body and is combined to form a closed annular cavity, and a second sealing gasket is arranged in the annular cavity.

[0016] The beneficial effects of the utility model are as follows: the present invention provides a structure for scraping off crystals with a wear compensation function, by arranging a compression compensation device between the valve body and the valve seat, the compression compensation device includes an elastic member between the valve body and the valve seat, which generates an elastic force on the valve seat toward the V-type ball valve core. Due to the elastic force compensation effect of the elastic member, the valve seat is sealed stably for a long time during the process of sealing against the V-type ball valve core, and the position of the scraper block is compensated by the elastic member after wear, thereby ensuring the scraping effect of the scraper block and making the anti-crystallization performance of the ball valve effective for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the utility model.

[0018] Figure 1 This is a schematic diagram of the overall structure of Example 1;

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of Example 1;

[0020] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0021] Figure 4 for Figure 2 Enlarged view of point B in the middle;

[0022] In the figure, 1-valve body, 2-sleeve, 3-lower shaft, 4-second sealing gasket, 5-lower cover, 6-bolt, 7-pin, 8-V-type ball valve core, 9-elastic part (spring), 10-valve seat, 101-scraper plate, 11-O-ring, 12-key, 13-valve stem, 131-first sealing section, 132-second sealing section, 133-flange, 14-stuffing box, 15-bolt, 16-gasket, 17-stuffing gland, 18-stud, 19-nut, 20-bracket, 21-pneumatic actuator, 22-purge hole. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings.

[0024] It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are for distinguishing two non-identical entities with the same name or non-identical parameters. It can be seen that "first" and "second" are only for the convenience of expression and should not be understood as limitations on the embodiments of the present invention. The subsequent embodiments will not explain this one by one.

[0025] The directions and positions mentioned in the present invention, such as "upper", "lower", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., are only for reference to the directions or positions of the drawings. Therefore, the directions and positions used are used to explain and understand the present invention, but not to limit the scope of protection of the present invention.

[0026] Example 1

[0027] like Figure 1-4 As shown, an anti-crystallization V-type ball valve comprises:

[0028] A valve body 1, wherein the valve body 1 has a valve cavity and a fluid channel communicating with the valve cavity;

[0029] A V-shaped ball valve core 8 disposed in the valve cavity of the valve body 1;

[0030] A valve seat 10 is arranged in the valve cavity and connected to the valve body 1, and the V-shaped ball valve core 8 rotates with the valve seat 10 to open or cut off the fluid passage;

[0031] A compression compensation device is arranged between the valve body 1 and the valve seat 10, and the compression compensation device includes an elastic member 9 arranged between the valve body 1 and the valve seat 10 to generate elastic force on the valve seat 10 toward the V-shaped ball valve core 8; a scraper block 101 is arranged on the contact surface between the valve seat 10 and the V-shaped ball valve core 8.

[0032] The scraper block 101 has a hexagonal cross section, and the scraper block 101 is partially embedded in the valve seat 10 so that at least three sides of the hexagonal cross section of the scraper block 101 are in contact with the valve seat 10 .

[0033] The scraper block 101 at least partially protrudes from the valve seat 10 , and a flexible sealing portion cooperating with the V-shaped ball valve core 8 is provided on the valve seat 10 in cooperation with the scraper block 101 .

[0034] The valve body 1 is provided with a first embedding groove, the valve seat 10 is provided with a second embedding groove, and both ends of the elastic member 9 are respectively embedded in the first embedding groove and the second embedding groove, so that the valve seat 10 has a movement tendency toward the V-shaped ball valve core 8 when contacting with the V-shaped ball valve core 8 to form a seal.

[0035] An O-ring 11 is embedded between the valve body 1 and the side of the valve seat 10 away from the compression compensation device.

[0036] It also includes a valve stem 13 connecting the V-type ball valve core 8 with the pneumatic actuator 21, the valve stem 13 and the V-type ball valve core 8 are connected by a key, a stuffing box 14 and a stuffing gland are arranged between the valve stem 13 and the valve body 1, and a shaft sleeve 2 is arranged between the stuffing box 14 and the V-type ball valve core 8 on the periphery of the valve stem 13.

[0037] The valve stem 13 includes a first sealing section 131 that cooperates with the stuffing box 14 and the stuffing gland, and a second sealing section 132 located between the first sealing section and the V-shaped ball valve core 8. A flange 133 is arranged between the first sealing section 131 and the second sealing section 132. A shaft sleeve 2 is sleeved on the second sealing section 132 and the upper end of the shaft sleeve 2 abuts against the flange 133.

[0038] The shaft sleeve 2 is embedded in the first annular groove in the valve body 1, and the first annular groove is isolated from the valve cavity; multiple layers of sealing rings are stacked in the stuffing box 14, and a first sealing gasket is arranged at the bottom of the stuffing box 14, and the first sealing gasket is located on the upper surface of the flange 133.

[0039] The valve stem 13 also includes a third sealing section connected to the lower position of the V-shaped ball valve core 8. The shaft sleeve 2 between the third sealing section and the valve body 1 is embedded in the second annular groove of the valve body 1, and the second annular groove is isolated from the valve cavity.

[0040] The lower end of the valve body 1 is connected to the lower cover 5, and the lower cover 5 and the valve body 1 are matched in a stepped sealing manner. The first sealing step of the lower cover 5 corresponds to the second sealing step of the valve body 1 and is combined to form a closed annular cavity. A second sealing gasket 4 is arranged in the annular cavity.

[0041] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.

Claims

1. An anti-crystallization V-type ball valve, comprising: A valve body (1), wherein the valve body (1) has a valve cavity and a fluid channel communicating with the valve cavity; A V-shaped ball valve core (8) disposed in a valve cavity of the valve body (1); A valve seat (10) is arranged in the valve cavity and connected to the valve body (1), wherein the V-shaped ball valve core (8) and the valve seat (10) are rotatably matched to open or close the fluid passage; The invention is characterized in that: a compression compensation device is arranged between the valve body (1) and the valve seat (10), and the compression compensation device comprises an elastic member (9) arranged between the valve body (1) and the valve seat (10) for generating an elastic force on the valve seat (10) toward the V-shaped ball valve core (8); A scraper block (101) is provided on the contact surface between the valve seat (10) and the V-shaped ball valve core (8).

2. The anti-crystallization V-type ball valve according to claim 1, characterized in that: The scraper block (101) has a hexagonal cross section, and the scraper block (101) is partially embedded in the valve seat (10) so that at least three sides of the hexagonal cross section of the scraper block (101) are in contact with the valve seat (10).

3. The anti-crystallization V-shaped ball valve according to claim 2, characterized in that: The scraper block (101) at least partially protrudes from the valve seat (10), and a flexible sealing portion that cooperates with the scraper block (101) and seals with the V-shaped ball valve core (8) is provided on the valve seat (10).

4. The anti-crystallization V-shaped ball valve according to claim 1, characterized in that: The valve body (1) is provided with a first embedding groove, the valve seat (10) is provided with a second embedding groove, and the two ends of the elastic member (9) are respectively embedded in the first embedding groove and the second embedding groove, so that the valve seat (10) has a tendency to move toward the V-shaped ball valve core (8) when contacting with the V-shaped ball valve core (8) to form a seal.

5. The anti-crystallization V-type ball valve according to claim 1, characterized in that: An O-type sealing ring (11) is embedded between the side of the valve seat (10) away from the compression compensation device and the valve body (1).

6. The anti-crystallization V-shaped ball valve according to claim 1, characterized in that: It also includes a valve stem (13) connecting the V-shaped ball valve core (8) to the driving mechanism, a stuffing box (14) and a stuffing gland are arranged between the valve stem (13) and the valve body (1), and a shaft sleeve (2) is arranged on the outer periphery of the valve stem (13) between the stuffing box (14) and the V-shaped ball valve core (8).

7. The anti-crystallization V-shaped ball valve according to claim 6, characterized in that: The valve stem (13) comprises a first sealing section (131) cooperating with a stuffing box (14) and a stuffing gland, and a second sealing section (132) located between the first sealing section and the V-shaped ball valve core (8); a flange (133) is arranged between the first sealing section (131) and the second sealing section (132); a shaft sleeve (2) is sleeved on the second sealing section (132) and an upper end of the shaft sleeve (2) abuts against the flange (133).

8. The anti-crystallization V-shaped ball valve according to claim 7, characterized in that: The shaft sleeve (2) is embedded in a first annular embedding groove in the valve body (1), and the first annular embedding groove is isolated from the valve cavity; Multiple layers of sealing rings are stacked in the stuffing box (14), and a first sealing gasket is arranged at the bottom of the stuffing box (14), wherein the first sealing gasket is located on the upper surface of the flange (133).

9. The anti-crystallization V-shaped ball valve according to claim 7, characterized in that: The valve stem (13) further comprises a third sealing section connected to a position below the V-shaped ball valve core (8), the shaft sleeve (2) between the third sealing section and the valve body (1) being embedded in a second annular embedding groove of the valve body (1), and the second annular embedding groove being isolated from the valve cavity.

10. The anti-crystallization V-shaped ball valve according to claim 9, characterized in that: The lower end of the valve body (1) is connected to the lower cover (5), and the lower cover (5) and the valve body (1) are matched in a stepped sealing manner. The first sealing step of the lower cover (5) corresponds to the second sealing step of the valve body (1) and is combined to form a closed annular cavity. A second sealing gasket (4) is arranged in the annular cavity.

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