High-vacuum manual angle valve with limiting protection function

Abstract

The high-vacuum manual angle valve with the limiting protection function comprises a valve body and a valve body cover, the valve body cover is fixed to the top of the valve body in a sealed mode, a threaded sleeve is coaxially fixed to the inner lower portion of the valve body cover in the mode that a screw is additionally installed, a threaded rod part is coaxially inserted into the threaded sleeve in a threaded fit mode, and the threaded rod part is fixedly connected with the valve body cover. And the top end of the screw part extends out of the top of the valve body cover. The utility model has the beneficial effects that the limit protection component is arranged at the position of the valve body cover, so that the limit protection component can limit the upward movement limit position of the screw part, and then the limit compression stroke of the corrugated pipe can be safely limited in a manner of limiting the upward movement limit position of the screw part; the compression stroke of the corrugated pipe is restrained within the allowable compression length range, the situation that the corrugated pipe is damaged due to excessive compression is avoided, the service life of the corrugated pipe is prolonged, and meanwhile the use reliability of the valve body is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of manual angle valve auxiliary assembly, specifically relates to a high vacuum manual angle valve with limit protection. BACKGROUND

[0002] Metal bellows is a wave-shaped tubular elastic sensitive device that can be stretched to lengthen or compressed to shorten, and when used in a valve, it can seal and prevent medium corrosion in the valve, and when applied to the existing high vacuum manual angle valve, the metal bellows can be stretched or compressed by rotating the hand wheel to drive the screw rod part to move up and down, when the metal bellows is in the stretched state, the bottom lower sealing plate is tightly pressed on the valve body to block the air outlet, at this time, a sealed environment is formed in the valve body chamber, and when the metal bellows is in the compressed state, the lower sealing plate drives the lower sealing plate to displace to open the air outlet, so that the medium can flow from the air inlet to the air outlet to form a through connection.

[0003] However, in the specific assembly of the current high vacuum manual angle valve, the valve body cover 5 and the screw sleeve 8 are usually fixed together with screws, then the screw rod part 9 is screwed into the screw sleeve 8, then the indicator 2 is sleeved into the screw rod part 9, and finally the hand wheel 1 is sleeved into the top of the screw rod part 9 and the lower end surface is attached to the indicator 2, and then the screws are tightened, as shown in the specific structure form of the attached Figure 3 figure, which causes the high vacuum manual angle valve to be used in the process, because the hand wheel can be rotated all the time to drive the screw rod part to displace upward all the time, and until the bellows cannot be compressed, the screw rod part cannot continue to rotate and displace upward, thereby causing the bellows to be excessively compressed, and the metal bellows may be damaged at any time due to excessive compression, directly reducing the service life of the metal bellows and the reliability of the high vacuum manual angle valve. INVENTION CONTENTS

[0004] The purpose of the utility model is to solve the above problems and provide a high vacuum manual angle valve with limit protection, a limit protection assembly is arranged at the valve body cover position, which can limit the upward displacement limit position of the screw rod part, and then the limit displacement limit position of the screw rod part can be limited to safely limit the limit compression stroke of the bellows, which realizes the compression stroke of the bellows being constrained within the allowable compression length range, as described below.

[0005] To achieve the above purpose, the utility model provides the following technical scheme:

[0006] This utility model provides a high vacuum manual angle valve with limit protection, including a valve body and a valve body cover. The valve body cover is sealed and fixed to the top of the valve body. A screw sleeve is coaxially fixed to the lower inner part of the valve body cover by adding screws. A screw rod is coaxially inserted into the screw sleeve by thread engagement, and the top end of the screw rod extends out of the top of the valve body cover.

[0007] The valve body cover and the valve body are coaxially fixed with an upper sealing plate, and the bottom surface of the upper sealing plate is coaxially fixed with a bellows around the outer edge of the screw sleeve. The bottom end of the bellows is coaxially fixed with a lower sealing plate, and the middle part of the top surface of the lower sealing plate rotates coaxially with the bottom end of the screw part. This is to drive the lower sealing plate to move vertically upward or downward by engaging with the screw part along the thread of the screw sleeve. At the same time, the lower sealing plate will not twist with the screw part during the vertical upward or downward movement by rotating the screw part and the lower sealing plate.

[0008] Inside the valve body cover, at the upper part of the screw sleeve, a limiting protection component is installed to limit the upward movement limit position of the screw section, and part of the limiting protection component is coaxially fixed to the periphery of the screw section.

[0009] Preferably, the limiting protection component includes a limiting post and a limiting ring. The bottom outer periphery of the limiting post is coaxially fixed to the valve body cover together with the screw sleeve by adding the screw. The inner periphery of the limiting post is coaxially clearance-fitted with the screw part. The portion of the screw part located in the inner periphery of the limiting post is coaxially fixed with the limiting ring, and the limiting ring is coaxially slidingly fitted with the inner periphery of the limiting post. The top of the limiting post has a passage hole that allows the screw part to pass smoothly, and the limiting ring cannot pass through the passage hole vertically.

[0010] Preferably, the vertical cross-sectional shape of the limiting post is an inverted U-shape.

[0011] Preferably, an indicator is coaxially sleeved on the screw section at the position of the inner perimeter of the material passage opening, the bottom end of the indicator abuts against the top of the limiting ring, and the indicator and the material passage opening are coaxially clearance fitted.

[0012] Preferably, a handwheel for easy force application and gripping is coaxially fixed at the top end of the screw, and the bottom end of the handwheel abuts against the top end of the indicator.

[0013] Preferably, the valve body has an air outlet and an air inlet at its lower part and one side, respectively, so as to tightly block the air outlet by the downward displacement of the lower sealing plate, and at the same time, to make the air inlet and the air outlet communicate with each other by the upward displacement of the lower sealing plate.

[0014] Preferably, a sealing ring is coaxially pressed at the position where the top of the valve body and the valve body cover meet, so that the valve body cover can be sealed and fixed to the top of the valve body.

[0015] Preferably, the bellows is a straight metal bellows pipe, and when the top of the limiting ring rises with the screw portion to contact the inner top of the limiting post, the bellows is at the allowable limit of compression length.

[0016] Preferably, the rotational connection between the screw section and the lower sealing plate is as follows: a central connecting hole is coaxially formed in the center of the top surface of the lower sealing plate; a screw end is coaxially and integrally fixed to the bottom end of the screw section; the screw end is inserted into the central connecting hole in a coaxial rotational engagement manner; a pressure rod fixing plate is coaxially fixed at the outer periphery of the central connecting hole on the top surface of the lower sealing plate to restrict the screw end in the central connecting hole and prevent it from coming out; and the screw end is rotatably embedded in the central connecting hole through the pressure rod fixing plate.

[0017] Preferably, the vertical cross-sectional shape of the screw end is T-shaped, and the lower part of the T-shape of the screw end is restricted by the pressure rod fixing plate and rotated into the central connecting hole.

[0018] The high-vacuum manual angle valve with limit protection described above, specifically in the use of the valve body, utilizes a limit protection component located at the valve body cover. This component limits the upward movement limit of the screw section, thereby safely restricting the ultimate compression stroke of the bellows. This confines the bellows' compression stroke within an allowable compression length range, preventing damage due to over-compression and extending its service life. Furthermore, it improves the reliability of the valve body. Specifically, the limit protection component's limit post is fixed to the valve body cover using screws. Inside the valve body cover, the limiting ring is coaxially fixed to the periphery of the screw section. As the screw section moves upward, it drives the limiting ring to move upward until it contacts the top of the limiting post, thus preventing the limiting ring from moving further upward. This method of limiting the upward limit position of the screw section is simple and easy to implement. Furthermore, when the top of the limiting ring rises with the screw section and contacts the top of the limiting post, the bellows is at its allowable limit compression length. This ensures that the bellows remains within the allowable compression length range during the upward compression process with the screw section, further facilitating the safe limitation of the bellows' limit compression stroke.

[0019] The beneficial effects are as follows: 1. This utility model provides a limit protection component at the valve body cover position, which can limit the upward movement limit position of the screw part. By limiting the upward movement limit position of the screw part, the limit compression stroke of the bellows can be safely limited, thus constraining the compression stroke of the bellows within the allowable compression length range. This avoids damage to the bellows due to excessive compression, which helps to improve the service life of the bellows and also helps to improve the reliability of the valve body.

[0020] 2. The limit post of the limit protection component is fixed inside the valve body cover by screws, and the limit ring is coaxially fixed to the outer periphery of the screw. Then, during the upward displacement of the screw, the limit ring is driven to move upward to the top and contact the top of the limit post, which can limit the limit ring from moving further upward, thereby limiting the screw from moving further upward. The method of limiting the upper limit position of the screw is simple and easy to implement, which further facilitates the safe limitation of the ultimate compression stroke of the bellows. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is an overall isometric schematic diagram of this utility model;

[0023] Figure 2 This is a utility model Figure 1 Partial schematic diagram;

[0024] Figure 3 This is a schematic diagram of the prior art portion of this utility model.

[0025] The annotations in the attached figures are explained as follows:

[0026] 1. Handwheel; 2. Indicator; 3. Limit protection assembly; 301. Limit post; 302. Limit ring; 303. Through hole; 4. Screw; 5. Valve body cover; 6. Upper sealing plate; 7. Sealing ring; 8. Screw sleeve; 9. Screw section; 901. Screw end; 10. Pressure rod fixing plate; 11. Lower sealing plate; 1101. Center connecting hole; 12. Valve body; 1201. Air outlet; 1202. Air inlet; 13. Bellows. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0028] See Figures 1-2As shown, this utility model provides a high-vacuum manual angle valve with limit protection, including a valve body 12 and a valve body cover 5. The valve body cover 5 is sealed and fixed to the top of the valve body 12. A threaded sleeve 8 is coaxially fixed to the lower inner part of the valve body cover 5 by adding screws 4. A threaded rod 9 is coaxially inserted into the threaded sleeve 8, and the top end of the threaded rod 9 extends out of the top of the valve body cover 5. An upper sealing plate 6 is coaxially fixed at the position where the valve body cover 5 and the valve body 12 are combined. A bellows 13 is coaxially fixed to the bottom surface of the upper sealing plate 6 at the position outside the threaded sleeve 8. The bottom end of the bellows 13 is coaxially fixed. A lower sealing plate 11 is fixed, and the top center of the lower sealing plate 11 rotates coaxially with the bottom end of the screw part 9. This allows the lower sealing plate 11 to be moved vertically upward or downward by the screw part 9 engaging with the threaded sleeve 8. This enables the lower sealing plate 11 to rise and open the air outlet 1201 or fall and close the air outlet 1201. At the same time, the screw part 9 is rotatably connected to the lower sealing plate 11 so that the lower sealing plate 11 will not twist with the screw part 9 during the vertical upward or downward movement. This prevents the bellows 13 from being damaged by twisting along with the lower sealing plate 11.

[0029] See Figures 1-2 As shown, a limit protection component 3 is installed inside the valve body cover 5, located above the screw sleeve 8, to limit the upward movement limit position of the screw part 9. A portion of the limit protection component 3 is coaxially fixed to the periphery of the screw part 9. The limit protection component 3 includes a limit post 301 and a limit ring 302. The bottom outer periphery of the limit post 301 is coaxially fixed to the valve body cover 5 together with the screw sleeve 8 by adding screws 4. The inner circumference of the limit post 301 is coaxially clearance-fitted with the screw part 9. The portion of the screw part 9 located within the inner circumference of the limit post 301 is coaxially fixed with the limit ring 302, and the limit... The ring 302 and the inner circumference of the limiting post 301 are coaxially slidably engaged. The top of the limiting post 301 is provided with a through hole 303 that allows the screw part 9 to pass smoothly. The limiting ring 302 cannot pass through the through hole 303 vertically. The purpose of this setting is to allow the screw part 9 to move upward during the upward displacement process. By driving the limiting ring 302 to move upward to the top and contact the top of the inner limit of the limiting post 301, the limiting ring 302 can be restricted from moving upward. This restricts the screw part 9 from moving upward. The method of limiting the upper limit position of the screw part 9 is simple and easy to implement.

[0030] See Figure 1As shown, the limit protection component 3, valve body 12 and bellows 13 have been optimized as follows. Specifically, for the limit protection component 3, the vertical cross-sectional shape of the limit post 301 is an inverted U-shape. Preferably, the bottom periphery of the limit post 301 extends outward horizontally so that the shape of the limit post 301 can meet the installation requirements and ensure that the bottom periphery of the limit post 301 can be coaxially fixed with the valve body cover 5 together with the screw sleeve 8 by adding screws 4. Optionally, an indicator 2 is coaxially fitted onto the screw section 9 within the passage opening 303. The bottom end of the indicator 2 abuts against the top of the limiting ring 302, and the indicator 2 and the passage opening 303 are coaxially clearance-fitted. This arrangement facilitates status indication by the indicator 2 rising and falling with the screw section 9. Specifically, when the indicator 2 rises with the screw section 9 to above the top surface of the valve body cover 5, it indicates that the air outlet 1201 is open; when the indicator 2 falls with the screw section 9 to the top surface level with the top surface of the valve body cover 5, it indicates that the air outlet 1201 is closed. Further, optionally, a handwheel 1 for easy gripping is coaxially fixed to the top of the screw section 9, and the bottom end of the handwheel 1 abuts against the top of the indicator 2. This arrangement facilitates forward and reverse operation of the screw section 9 by gripping the handwheel 1. More specifically, the lower part and one side of the valve body 12 are respectively provided with an air outlet 1201 and an air inlet 1202. The air outlet 1201 is tightly blocked by the downward displacement of the lower sealing plate 11, while the air inlet 1202 and the air outlet 1201 are connected by the upward displacement of the lower sealing plate 11. With this configuration, when the bellows 13 is in a stretched state, it can drive the lower sealing plate 11 to tightly block the air outlet 1201, and a sealed environment is formed inside the valve body 12. When the bellows 13 is in a compressed state, it can drive the lower sealing plate 11 to rise and open the air outlet 1201, so that the medium can flow from the air inlet 1202 to the air outlet 1201 to form a connection.

[0031] See Figures 1-2 As shown, specifically regarding the valve body 12 and the bellows 13, a sealing ring 7 is coaxially pressed at the position where the top of the valve body 12 joins the valve body cover 5. This ensures that the valve body cover 5 is sealed and fixed to the top of the valve body 12, thereby ensuring a stable and reliable seal at the joint between the valve body 12 and the valve body cover 5. The bellows 13 can be an optional straight metal bellows pipe. When the top of the limiting ring 302 rises with the screw portion 9 to contact the inner top of the limiting post 301, the bellows 13 is at its allowable maximum compression length. This configuration ensures that the bellows 13 remains within the allowable compression length range during the upward displacement and compression process with the screw portion 9.

[0032] See Figures 1-2As shown, the rotational connection between the screw part 9 and the lower sealing plate 11 is specifically as follows: a central connecting hole 1101 is coaxially opened in the middle of the top surface of the lower sealing plate 11; a screw end 901 is coaxially and integrally fixed to the bottom end of the screw part 9; and the screw end 901 is inserted into the central connecting hole 1101 in a coaxial rotational engagement manner. A pressure rod fixing plate 10 is coaxially fixed at the outer periphery of the central connecting hole 1101 on the top surface of the lower sealing plate 11 to restrict the screw end 901 in the central connecting hole 1101 and prevent it from coming out. The screw end 901 is rotatably embedded in the central connecting hole 1101 through the pressure rod fixing plate 10. With this arrangement, the screw part 9 can be rotated to push and pull the lower sealing plate 11 to complete the lowering and raising actions by rotating, while also preventing the screw part 9 from driving the lower sealing plate 11 to rotate during the rotation process, thus preventing torsion damage to the bellows 13. More specifically, the vertical cross-sectional shape of the screw end 901 is T-shaped, and the lower part of the T-shape of the screw end 901 is restricted by the pressure rod fixing plate 10 and rotated into the central connecting hole 1101. This arrangement allows the design of the screw end 901 to simultaneously satisfy the requirements of rotational connection with the central connecting hole 1101 and being restricted by the pressure rod fixing plate 10 in the central connecting hole 1101 so that it cannot come out.

[0033] With the above structure, specifically in the use of the valve body 12, since a limit protection component 3 is provided at the valve body cover 5, the upward movement limit position of the screw part 9 can be limited by the limit protection component 3. Furthermore, by limiting the upward movement limit position of the screw part 9, the ultimate compression stroke of the bellows 13 can be safely limited, thus constraining the compression stroke of the bellows 13 within an allowable compression length range. This prevents damage to the bellows 13 due to excessive compression, which helps to extend the service life of the bellows 13 and improves the reliability of the valve body 12. Specifically, in the limit protection component 3, the limit post 301 of the limit protection component 3 is fixed inside the valve body cover 5 by screws 4, and the limit ring 3... 02 is coaxially fixed to the periphery of the screw part 9. Then, during the upward displacement of the screw part 9, the limiting ring 302 is moved upward to the top and contacts the inner top of the limiting post 301, which can limit the limiting ring 302 from moving upward further. This can limit the screw part 9 from moving upward further. The method of limiting the upper limit position of the screw part 9 is simple and easy to implement. Moreover, when the top of the limiting ring 302 rises with the screw part 9 and contacts the inner top of the limiting post 301, the bellows 13 is at the allowable limit compression length. This ensures that the bellows 13 is within the allowable compression length range during the upward displacement and compression process with the screw part 9, which further facilitates the safe limitation of the limit compression stroke of the bellows 13.

[0034] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A high vacuum manual angle valve with limit protection, comprising a valve body (12) and a valve cover (5), characterized in that: The top of the valve body (12) is sealingly fixed with the valve cover (5), the inner lower part of the valve cover (5) is coaxially fixed with the screw sleeve (8) by means of the screw (4), the screw sleeve (8) is coaxially inserted with the screw rod (9) in a threaded manner, and the top end of the screw rod (9) extends out of the top of the valve cover (5); The position of the combination of the valve cover (5) and the valve body (12) is coaxially fixed with the upper sealing plate (6), the bottom surface of the upper sealing plate (6) is coaxially fixed with the bellows (13) at the position of the periphery of the screw sleeve (8), the bottom end of the bellows (13) is coaxially fixed with the lower sealing plate (11), and the top surface of the lower sealing plate (11) is coaxially rotatable with the bottom end of the screw rod (9), so as to drive the lower sealing plate (11) to vertically move upward or downward by means of the screw rod (9) engaging with the screw sleeve (8) in a threaded manner, and the lower sealing plate (11) will not be twisted with the screw rod (9) during the vertical upward or downward movement of the lower sealing plate (11) by means of the rotatable connection between the screw rod (9) and the lower sealing plate (11). The position of the valve cover (5) inside the screw sleeve (8) is provided with a limiting protection assembly (3) for limiting the upward limit position of the screw rod (9), and part of the limiting protection assembly (3) is coaxially fixed on the periphery of the screw rod (9).

2. The high vacuum manual angle valve with limit protection according to claim 1, characterized in that: The limiting protection assembly (3) comprises a limiting column (301) and a limiting ring (302), the bottom outer periphery of the limiting column (301) is coaxially fixed and combined with the screw sleeve (8) and the valve cover (5) by means of the screw (4), the inner periphery of the limiting column (301) is coaxially gap-fitted with the screw rod (9), the part of the screw rod (9) located in the inner periphery of the limiting column (301) is coaxially fixed with the limiting ring (302), and the limiting ring (302) is coaxially slidingly fitted with the inner periphery of the limiting column (301), the top end of the limiting column (301) is provided with a passing opening (303) through which the screw rod (9) can smoothly pass, and the limiting ring (302) cannot pass through the passing opening (303) in the vertical direction.

3. The high vacuum manual angle valve with limit protection according to claim 2, characterized in that: The vertical cross-sectional shape of the limiting column (301) is an inverted U shape.

4. The high vacuum manual angle valve with limit protection according to claim 3, characterized in that: The screw rod (9) is coaxially sleeved with an indicator (2) at the position of the inner periphery of the passing opening (303), the bottom end of the indicator (2) abuts against the top of the limiting ring (302), and the indicator (2) is coaxially gap-fitted with the passing opening (303).

5. The high vacuum manual angle valve with limit protection according to claim 4, characterized in that: The top end of the screw rod (9) is coaxially fixed with a hand wheel (1) for facilitating force application and gripping, and the bottom end of the hand wheel (1) abuts against the top end of the indicator (2). The top end of the screw rod (9) is coaxially fixed with a hand wheel (1) for facilitating force application and gripping, and the bottom end of the hand wheel (1) abuts against the top end of the indicator (2).

6. The high vacuum manual angle valve with limit protection according to claim 5, characterized in that: The lower part and one side of the valve body (12) are respectively provided with an air outlet (1201) and an air inlet (1202), which are tightly closed by downward displacement of the lower sealing plate (11), while the air inlet (1202) is in series with the air outlet (1201) by upward displacement of the lower sealing plate (11).

7. The high vacuum manual angle valve with limit protection according to claim 6, characterized in that: The top of the valve body (12) is coaxially compressed with a sealing ring (7) at the position of the valve cover (5), so that the valve cover (5) can be sealed and fixed on the top of the valve body (12).

8. The high vacuum manual angle valve with position-limiting protection according to any one of claims 2-7, characterized in that: The bellows (13) is a metal bellows straight pipe, and when the top end of the limiting ring (302) rises to contact the inner top of the limiting column (301) with the screw rod part (9), the bellows (13) is in the allowable limit compression length.

9. The high vacuum manual angle valve with limit protection according to claim 8, characterized in that: The rotating connection between the screw rod part (9) and the lower sealing plate (11) is that the top surface of the lower sealing plate (11) is coaxially provided with a center connection hole (1101), the bottom end of the screw rod part (9) is coaxially and integrally fixed with a screw rod end (901), the screw rod end (901) is inserted into the center connection hole (1101) in coaxial rotating fit, the top surface of the lower sealing plate (11) is coaxially fixed with a pressure rod fixing plate (10) outside the center connection hole (1101), which is used to limit the screw rod end (901) from being taken out of the center connection hole (1101), and the screw rod end (901) is rotatably embedded in the center connection hole (1101) through the pressure rod fixing plate (10).

10. The high vacuum manual angle valve with limit protection according to claim 9, characterized in that: The vertical sectional shape of the screw rod end (901) is T-shaped, and the T-shaped lower part of the screw rod end (901) is limited and rotatably embedded in the center connection hole (1101) by the pressure rod fixing plate (10).

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