Manual blind plate valve stable in valve plate switching

Abstract

The utility model discloses a manual blind plate valve stable in valve plate switching, which is characterized by comprising two half valve bodies, a valve plate limited between the two half valve bodies and three connecting screws distributed geometrically and connecting the two half valve bodies together, and the valve plate comprises a blind hole plate and a through hole plate. Each half valve body comprises a barrel part allowing a medium to flow and a group of connecting parts located on the outer side of the barrel part and allowing the connecting screw to penetrate through, a positioning hole located between the blind hole plate and the through hole plate is formed in the valve plate, two alignment grooves and two alignment holes are formed in the two groups of connecting parts respectively, the two alignment grooves and the two alignment holes are coaxially formed, and the two alignment grooves and the two alignment holes are coaxially arranged. The two alignment holes are both located on the moving track of the positioning hole, the two alignment holes are located in the two sides of the cylinder part respectively, the positioning pin can be inserted into one alignment hole, the positioning hole and the corresponding alignment groove at the same time, and the problem that in the prior art, leakage is caused due to the fact that the position of the valve plate relative to the half valve body is deviated is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of blind plate valves, and more particularly to a manual blind plate valve with stable valve plate switching. Background Art

[0002] The manual blind plate valve consists of two half valve bodies, a valve plate and three connecting screws. The valve plate is located between the two half valve bodies. The two half valve bodies are connected to each other by three connecting screws to form a valve body. The three connecting screws are rotated in sequence by a special wrench to enable the two half valve bodies to complete the clamping and loosening actions. The position change of the blind hole plate and the through hole plate on the valve plate is used to achieve the purpose of opening and closing.

[0003] When the valve plate of the manual blind plate valve is manually switched each time, the through-hole plate may rotate excessively or fail to reach the specified rotation angle due to human factors, or the blind hole plate on the valve plate may be located on one side of the valve body and cause the valve plate to rotate relative to the valve body under the action of gravity. The above two situations will cause the position of the valve plate relative to the valve body to be non-unique, thereby causing the through-hole plate and the inner cavity of the valve body to be misaligned, causing the manual blind plate valve to be unable to reach the maximum flow rate. At the same time, after the two half valve bodies clamp the through-hole plate, the sealing pair and the through-hole edge of the through-hole plate may not be fully in contact, resulting in leakage, and the flow of the medium may also accelerate the local wear of the edge of the inner hole of the through-hole plate; after the two half valve bodies clamp the valve plate together, there is still a part of the valve plate that is always located on one side of the valve body. Under the action of gravity or external force, the valve plate will have a tendency or rotation relative to the valve body, and corresponding static friction or sliding friction will be generated between the valve plate and the sealing pair, which will aggravate the wear of the sealing pair and cause leakage. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model aims to provide a manual blind plate valve with accurate valve plate switching and stable state.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a manual blind plate valve with stable valve plate switching, comprising two half valve bodies, a valve plate limited between the two half valve bodies and three connecting screws that are geometrically distributed and connect the two half valve bodies together, the valve plate comprising a blind hole plate and a through hole plate, the two half valve bodies each comprising a barrel for medium flow and a group of connecting parts located outside the barrel and for the connecting screw to pass through, a positioning hole located between the blind hole plate and the through hole plate is opened on the valve plate, two groups of the connecting parts are respectively provided with two alignment grooves and two alignment holes, the two alignment grooves and the two alignment holes are respectively coaxially arranged, the two alignment holes are both located on the trajectory of the movement of the positioning holes, the two alignment holes are respectively located on both sides of the barrel, and also comprises a positioning pin that can be simultaneously inserted into an alignment hole, the positioning hole and the corresponding alignment groove, and the valve plate is made stationary relative to the half valve body by making the positioning hole coaxial with any one of the alignment holes and allowing the positioning pin to pass through.

[0006] As a further improvement of the present invention, a frustum portion coaxial with the locating pin is provided at the end of the locating pin extending into the alignment groove, the diameter of the end of the frustum portion connected to the locating pin is the same as the diameter of the locating pin, and the diameter of the end of the frustum portion away from the locating pin is smaller than the diameter of the locating pin.

[0007] As a further improvement of the present invention, a limiting member having a contour dimension larger than that of the end portion of the locating pin is provided on the end portion of the locating pin away from the truncated cone portion.

[0008] As a further improvement of the utility model, a limiting groove for accommodating the limiting member is provided on the connecting portion provided with the alignment hole.

[0009] As a further improvement of the present invention, a pull ring that can swing down naturally is hinged on the end surface of the limiting member away from the positioning pin.

[0010] As a further improvement of the utility model, the connection portion with the alignment hole is provided with an anti-lost ring for the positioning pin to pass through and capable of contacting with the limiting member.

[0011] The beneficial effects of the utility model: by making the positioning hole coaxial with any one of the alignment holes and allowing the positioning pin to pass through, the valve plate is made stationary relative to the half valve body. Compared with the prior art, such a design can ensure the accurate position of the valve plate after each switching. In the process of the two half valve bodies moving toward each other, the valve plate cannot rotate relative to the half valve body under the action of gravity, ensuring that the through-hole plate and the cylinder are coaxially arranged, while also reducing the wear of the sealing pair and ensuring the sealing performance; using a positioning pin to switch between the two alignment holes can effectively reduce the number of positioning pins used and reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a three-dimensional diagram of the positioning pin of the utility model when it is inserted into the valve plate;

[0013] Figure 2 for Figure 1 Exploded diagram of

[0014] Figure 3 for Figure 1 The main view of

[0015] Figure 4 It is a three-dimensional diagram of the positioning pin of the utility model when it is pulled out from the valve plate and placed in the anti-lost ring;

[0016] Figure 5 for Figure 4 Enlarged view of point A in the middle.

[0017] Figure numerals: 1. Half valve body; 11. Cylinder; 12. Connecting part; 13. Alignment groove; 14. Alignment hole; 15. Limiting groove; 16. Anti-lost ring; 2. Valve plate; 21. Blind hole plate; 22. Through hole plate; 23. Positioning hole; 3. Connecting screw; 4. Positioning pin; 41. Cone part; 42. Limiting piece; 43. Pull ring. DETAILED DESCRIPTION

[0018] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments, wherein the same components are indicated by the same reference numerals.

[0019] Reference Figures 1 to 5 As shown, a manual blind plate valve with stable valve plate switching in this embodiment comprises two half valve bodies 1, a valve plate 2 limited between the two half valve bodies 1, and three connecting screws 3 which are geometrically distributed and connect the two half valve bodies 1 together, the valve plate 2 comprises a blind hole plate 21 and a through hole plate 22, and the two half valve bodies 1 each comprise a barrel 11 for medium flow and a group of connecting parts 12 which are located outside the barrel 11 and through which the connecting screws 3 pass;

[0020] Based on the above-mentioned prior art, a positioning hole 23 located between the blind hole plate 21 and the through hole plate 22 is opened on the valve plate 2, and two alignment grooves 13 and two alignment holes 14 are respectively provided on the two sets of connecting parts 12, and the two alignment grooves 13 and the two alignment holes 14 are respectively coaxially arranged, and the two alignment holes 14 are both located on the trajectory of the movement of the positioning hole 23. The two alignment holes 14 are respectively located on both sides of the cylinder 11, and also include a positioning pin 4 that can be simultaneously inserted into an alignment hole 14, the positioning hole 23 and the corresponding alignment groove 13;

[0021] In the initial state, the blind hole plate 21 is located between the two half valve bodies 1 and the through hole plate 22 is located on the left side of the cylinder 11, the positioning hole 23 is located on the left side of the cylinder 11, and the positioning pin 4 is simultaneously inserted into the alignment hole 14, the positioning hole 23 and the alignment groove 13 on the left side of the cylinder 11. When it is necessary to switch the through hole plate 22 between the two half valve bodies 1, first pull out the positioning pin 4 from the alignment hole 14 on the left side of the cylinder 11, then the two half valve bodies 1 move away from each other, and then rotate the valve plate 2 until the through hole plate 22 is coaxial with the half valve body 1, and the blind hole plate 21 and the positioning hole 23 are successively moved to the right side of the cylinder 11, and the alignment hole 14 and the alignment groove 13 on the right side of the cylinder 11 are coaxial with the positioning hole 23, and then the positioning pin 4 is inserted into the alignment hole 14 on the right side of the cylinder 11 so that the valve plate 2 cannot rotate relative to the half valve body 1, and finally the two half valve bodies 1 are moved toward each other to clamp the valve plate 2 again;

[0022] Compared with the prior art, such a design can ensure that the position of the valve plate 2 is accurate after each switching. In the process of the two half-valve bodies 1 moving toward each other, the valve plate 2 cannot rotate relative to the half-valve body 1 under the action of gravity, ensuring that the through-hole plate 22 is coaxially arranged with the cylinder 11. At the same time, the wear of the sealing pair is also reduced to ensure the sealing performance. Using a locating pin 4 to switch between the two alignment holes 14 can effectively reduce the number of locating pins 4 used and reduce costs.

[0023] As a specific implementation of the improvement, each time the valve plate 2 is manually rotated, there will always be a situation where the positioning hole 23 and the alignment hole 14 are eccentric. After the user thinks that they are firmly aligned, the positioning pin 4 is inserted into the alignment hole 14, and the edge of the end of the positioning pin 4 touches the valve plate 2 and cannot enter the positioning hole 23. To solve the above problem, refer to Figure 5 As shown, a conical portion 41 coaxial with the locating pin 4 is integrally formed at the end of the locating pin 4 extending into the alignment groove 13. The diameter of the end of the conical portion 41 connected to the locating pin 4 is the same as the diameter of the locating pin 4, and the diameter of the end of the conical portion 41 away from the locating pin 4 is smaller than the diameter of the locating pin 4. When the locating hole 23 and the alignment hole 14 are eccentric, the end of the conical portion 41 will enter the locating hole 23. As the conical portion 41 gradually penetrates into the locating hole 23, the peripheral wall of the conical portion 41 will slide relative to the edge of the hole opening of the locating hole 23, and the valve plate 2 will rotate relative to the half valve body 1 and undergo fine adjustment until the locating pin 4 enters the locating hole 23. Then, the valve plate 2 rotates into place relative to the half valve body 1. Such a design can fine-tune the position of the valve plate 2 relative to the half valve body 1, facilitates the locating pin 4 to pass through the locating hole 23 smoothly, and improves the assembly efficiency.

[0024] As a specific implementation of the improvement, after the positioning pin 4 passes through the alignment hole 14 and the positioning hole 23 successively and enters the alignment groove 13, there is a situation where the end of the positioning pin 4 touches the alignment groove 13. The user continues to apply thrust to the positioning pin 4 while holding the half valve body 1 processed with the alignment hole 14. This will cause the two half valve bodies 1 to tend to move away from each other, resulting in damage to the threads on the surface of the connecting screw 3. In order to solve the above-mentioned problem, refer to Figures 1 to 5 As shown, a limit piece 42 with a contour dimension larger than that of the end portion of the locating pin 4 is provided on the end portion of the locating pin 4 away from the conical portion 41. When the limit piece 42 contacts the connecting portion 12 with the alignment hole 14, the locating pin 4 is inserted into place. Such a design can provide the user with information that the locating pin 4 has moved into place, thereby compensating for the defect that the locating pin 4 pushes the other half of the valve body 1.

[0025] As a specific implementation method of the improvement, refer to Figure 5 As shown, a limiting groove 15 for accommodating the limiting member 42 is provided on the connecting portion 12 provided with the alignment hole 14. Compared with the design in which the limiting member 42 is raised relative to the surface of the half valve body 1, such a design can avoid the situation in which the limiting member 42 is bent relative to the positioning pin 4 due to external falling rocks and the like, thereby affecting subsequent use, thereby effectively ensuring the overall structural stability of the positioning pin 4 and the limiting member 42.

[0026] As a specific implementation method of the improvement, refer to Figure 5 As shown, a pull ring 43 that can swing down naturally is hinged on the end surface of the limiting member 42 away from the positioning pin 4. Such a design can provide a pulling position for the user to facilitate the removal of the positioning pin 4.

[0027] As a specific implementation of the improvement, when the positioning pin 4 is pulled out and the valve plate 2 is not rotated into place, the positioning pin 4 needs to be placed elsewhere, which makes it easy for the positioning pin 4 to be lost or damaged. To solve the above problem, refer to Figure 5 As shown, the connecting portion 12 with the alignment hole 14 is provided with an anti-lost ring 16 for the locating pin 4 to pass through and which can contact the limiting member 42. There are two anti-lost rings 16, which are respectively located on one side of the two alignment holes 14. During each switching process, after the locating pin 4 is pulled out and subsequently inserted into the anti-lost ring 16 on the side of the alignment hole 14 that needs to be plugged in, the anti-lost ring 16 drags the limiting member 42, and then the two half valve bodies 1 are moved away from each other and the valve plate 2 is rotated into place, and then the limiting member 42 is pulled out of the anti-lost ring 16 nearby and inserted into the alignment hole 14, and finally the two half valve bodies 1 are brought close to each other and clamp the valve plate 2 together. Such a design allows the user to not need to find a special position to place the locating pin 4, thereby further improving the switching efficiency, while also having the function of preventing loss and ensuring the structural stability of the locating pin 4.

[0028] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A manual blind plate valve with stable valve plate switching, comprising two half valve bodies (1), a valve plate (2) limited between the two half valve bodies (1) and three connecting screws (3) which are geometrically distributed and connect the two half valve bodies (1) together, the valve plate (2) comprising a blind hole plate (21) and a through hole plate (22), the two half valve bodies (1) each comprising a barrel (11) for medium flow and a group of connecting parts (12) located outside the barrel (11) and for the connecting screws (3) to pass through, characterized in that: The valve plate (2) is provided with a positioning hole (23) located between the blind hole plate (21) and the through hole plate (22); two alignment grooves (13) and two alignment holes (14) are respectively provided on the two groups of the connecting parts (12); the two alignment grooves (13) and the two alignment holes (14) are respectively coaxially arranged; the two alignment holes (14) are both located on the moving trajectory of the positioning hole (23); the two alignment holes (14) are respectively located on both sides of the barrel (11); and a positioning pin (4) is also included which can be simultaneously inserted into an alignment hole (14), the positioning hole (23) and the corresponding alignment groove (13); by making the positioning hole (23) coaxial with any one of the alignment holes (14) and allowing the positioning pin (4) to pass through, the valve plate (2) is stationary relative to the half valve body (1).

2. A manual blind plate valve with stable valve plate switching according to claim 1, characterized in that: A truncated cone portion (41) coaxial with the locating pin (4) is provided at the end of the locating pin (4) extending into the alignment groove (13); the diameter of the end of the truncated cone portion (41) connected to the locating pin (4) is the same as the diameter of the locating pin (4); and the diameter of the end of the truncated cone portion (41) away from the locating pin (4) is smaller than the diameter of the locating pin (4).

3. A manual blind plate valve with stable valve plate switching according to claim 2, characterized in that: A stopper (42) having an outline dimension greater than that of the end of the positioning pin (4) is provided on the end of the positioning pin (4) away from the truncated cone portion (41).

4. A manual blind plate valve with stable valve plate switching according to claim 3, characterized in that: The connection portion (12) provided with the alignment hole (14) is provided with a limiting groove (15) for accommodating the limiting member (42).

5. A manual blind plate valve with stable valve plate switching according to claim 3 or 4, characterized in that: A pull ring (43) that can swing down naturally is hingedly connected on the end surface of the limiting member (42) away from the positioning pin (4).

6. A manual blind plate valve with stable valve plate switching according to claim 3 or 4, characterized in that: The connecting portion (12) provided with a positioning hole (14) is provided with an anti-lost ring (16) for the positioning pin (4) to pass through and capable of contacting with the limiting member (42).

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