Novel connecting structure balance cylinder type valve

Abstract

The utility model discloses a balance cylinder type valve with a novel connecting structure, and solves the technical problems that in the prior art, a valve rod is directly connected with a valve core, and the diameter of the connecting part is thin and narrow, so that when a balance cylinder of the valve is in a high-frequency switch lifting motion process, the valve action is jammed and the valve rod is broken easily when dust is accumulated in the balance cylinder. The balance valve comprises a valve body, a valve rod, a valve element and a balance cylinder, the bottom end of the valve rod is in movable contact with the valve element, a valve element guide sleeve is arranged on the valve element, and a lifting mechanism which abuts against the valve element guide sleeve and is used for lifting the valve element through the valve element guide sleeve is arranged on the valve rod. When the valve rod moves upwards, the valve element guide sleeve is lifted through the lifting mechanism so that the valve element fixed to the valve element guide sleeve can be lifted, when the valve rod moves downwards, the lifting mechanism and the valve element guide sleeve are not stressed, the lower end of the valve rod abuts against the valve element and drives the valve element to move downwards, the valve rod and the valve element are not directly connected, the diameter of the valve rod is larger, and therefore the valve rod is more stable. Strength is more reliable, and valve rod breakage caused by valve action jamming can be effectively avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of valves, and in particular relates to a balanced cylinder valve with a novel connection structure. Background Art

[0002] Valves are pipeline accessories used to open and close pipelines, control flow direction, and regulate and control the parameters (temperature, pressure, and flow) of the conveying medium. Existing valves have stems connected to the lower end of the valve core. During the valve's lifting and lowering motion, the force is primarily applied at the lower stem-spool connection, which is relatively far from the positioning sleeve. Dust accumulates on the inner wall of the balancing cylinder. When the valve's balancing cylinder is subjected to high-frequency opening and closing and lifting movements, the dust inside the balancing cylinder can cause the valve to become stuck and the stem to break. This can cause process gas to cross-flow from both ends of the valve body, affecting the smooth operation of the equipment. In severe cases, it can cause the equipment to shut down, resulting in significant losses and affecting the long-term stable operation of the equipment. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a new type of connection structure balanced cylinder valve to at least solve some of the above technical problems.

[0004] In order to achieve the above purpose, the technical solution adopted by the present utility model is as follows:

[0005] A new type of connection structure balanced cylinder valve includes a valve body, a valve stem, a valve core and a balance cylinder. The bottom end of the valve stem is in active contact with the valve core. A valve core guide sleeve is provided on the valve core. The valve stem is provided with a lifting mechanism that contacts the valve core guide sleeve and is used to lift the valve core through the valve core guide sleeve.

[0006] Furthermore, the lifting mechanism includes a circular ring mounted on the valve stem, and a circular ring sleeve sleeved on the circular ring and in conflict with the valve core guide sleeve.

[0007] Furthermore, the outer wall of the annular sleeve and the inner wall of the valve core are clearance-matched, and the clearance between the two is 0.5-1 mm.

[0008] Furthermore, a valve stem groove adapted to the circular ring is provided on the valve stem, and the circular ring is sleeved in the valve stem groove.

[0009] Furthermore, the valve core guide sleeve is fixedly installed on the top of the valve core by screws.

[0010] Furthermore, a contact groove adapted to the valve stem is provided on the valve core, and the valve stem presses against the contact groove when pressed downward.

[0011] Furthermore, the valve core guide sleeve is located in the balancing cylinder, and a sealing member is provided between the outer wall of the valve core guide sleeve and the inner wall of the balancing cylinder.

[0012] Furthermore, the valve core guide sleeve divides the cavity formed by the valve core and the balance cylinder into a balance cylinder cavity located above the valve core guide sleeve and a valve core cavity located below the valve core guide sleeve, and the lifting mechanism is located in the valve core cavity.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The utility model has a simple structure and a scientific and reasonable design. When the valve stem moves upward, the valve core guide sleeve is lifted by the lifting mechanism, thereby lifting the valve core fixed to the valve core guide sleeve. When the valve stem moves downward, there is no force between the lifting mechanism and the valve core guide sleeve, and the lower end of the valve stem abuts against the top of the valve core and drives the valve core downward. With this design, there is no direct connection between the valve stem and the valve core, the overall diameter of the valve stem is larger, the strength is more reliable, and the valve stem breakage caused by valve jamming can be effectively avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the utility model.

[0016] Figure 2 This is a schematic diagram of the valve core guide sleeve and lifting mechanism of the utility model (please refer to the edge disconnection in the figure) Figure 1 understand).

[0017] Figure 3 This is an enlarged view of the valve core cavity of the utility model.

[0018] Figure 4 It is a partial enlarged view of the utility model.

[0019] Figure 5 This is a cross-sectional view of the valve core guide sleeve of the utility model.

[0020] Figure 6 This is a schematic diagram of the connection between the circular ring, circular ring sleeve and valve stem of the utility model.

[0021] Figure 7 This is a schematic diagram of the valve stem groove on the valve stem of the utility model.

[0022] The names corresponding to the reference numerals are:

[0023] 1-valve body, 2-valve stem, 3-valve core, 4-balancing cylinder, 5-valve core guide sleeve, 6-ring, 7-ring sleeve, 8-valve stem groove, 9-seal, 10-balancing cylinder cavity, 11-valve core cavity, 12-contact groove. DETAILED DESCRIPTION

[0024] To make the purpose, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings. It is apparent that the embodiments described herein are merely a portion of the embodiments of the present invention, and not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0025] Example 1.

[0026] like Figure 1-Figure 7 As shown, the utility model provides a new type of connection structure balanced cylinder valve, including a valve body 1, a valve stem 2, a valve core 3 and a balancing cylinder 4, and is characterized in that the bottom end of the valve stem 2 is in movably contact with the valve core 3, a valve core guide sleeve 5 is provided on the valve core 3, and a lifting mechanism is provided on the valve stem 2, which is in conflict with the valve core guide sleeve 5 and is used to lift the valve core 3 through the valve core guide sleeve 5.

[0027] The utility model has a simple structure and a scientific and reasonable design. When the valve stem moves upward, the valve core guide sleeve is lifted by the lifting mechanism, thereby lifting the valve core fixed to the valve core guide sleeve. When the valve stem moves downward, there is no force between the lifting mechanism and the valve core guide sleeve, and the lower end of the valve stem abuts against the top of the valve core and drives the valve core downward. With this design, there is no direct connection between the valve stem and the valve core, the overall diameter of the valve stem is larger, the strength is more reliable, and the valve stem breakage caused by valve jamming can be effectively avoided.

[0028] Example 2.

[0029] like Figure 1-Figure 7 As shown, the utility model provides a new type of connection structure balanced cylinder valve, including a valve body 1, a valve stem 2, a valve core 3 and a balancing cylinder 4, and is characterized in that the bottom end of the valve stem 2 is in movably contact with the valve core 3, a valve core guide sleeve 5 is provided on the valve core 3, and a lifting mechanism is provided on the valve stem 2, which is in conflict with the valve core guide sleeve 5 and is used to lift the valve core 3 through the valve core guide sleeve 5.

[0030] The lifting mechanism includes a circular ring 6 mounted on the valve stem 2 and a circular ring sleeve 7 sleeved on the circular ring 6 and in contact with the valve core guide sleeve 5 .

[0031] Based on Example 1, this second embodiment provides a more preferred structure for the lifting mechanism. Specifically, the lifting mechanism includes a circular ring 6 mounted on the valve stem 2, and a circular ring sleeve 7 fitted over the circular ring 6 and in contact with the valve core guide sleeve 5. The valve core guide sleeve 5 presses the circular ring sleeve 7, which in turn encloses the circular ring 6. The circular ring 6 is embedded in the valve stem, thereby connecting the valve stem and the valve core. The structure is simple, stable, and has stable structural performance and reliable connection.

[0032] Example 3.

[0033] like Figure 1-Figure 7As shown, the utility model provides a new type of connection structure balanced cylinder valve, including a valve body 1, a valve stem 2, a valve core 3 and a balancing cylinder 4, and is characterized in that the bottom end of the valve stem 2 is in movably contact with the valve core 3, a valve core guide sleeve 5 is provided on the valve core 3, and a lifting mechanism is provided on the valve stem 2, which is in conflict with the valve core guide sleeve 5 and is used to lift the valve core 3 through the valve core guide sleeve 5.

[0034] The lifting mechanism includes a circular ring 6 mounted on the valve stem 2 and a circular ring sleeve 7 sleeved on the circular ring 6 and in contact with the valve core guide sleeve 5 .

[0035] The outer wall of the annular sleeve 7 and the inner wall of the valve core 3 are clearance-matched, and the clearance between the two is 0.5-1 mm.

[0036] Based on Example 2, Example 3 provides a more preferred connection structure between the annular sleeve 7 and the valve core 3. Specifically, the outer wall of the annular sleeve 7 and the inner wall of the valve core 3 are spaced apart, with the gap between them being 0.5-1 mm. This small gap between the outer wall of the annular sleeve 7 and the inner wall of the valve core retains dust in the process gas within the valve core cavity to a maximum extent, effectively reducing the dust content of the process gas entering the balancing cylinder cavity, reducing the possibility of dust accumulation on the inner wall of the balancing cylinder, and improving the smooth operation of the valve.

[0037] Example 4.

[0038] like Figure 1-Figure 7 As shown, the utility model provides a new type of connection structure balanced cylinder valve, including a valve body 1, a valve stem 2, a valve core 3 and a balancing cylinder 4, and is characterized in that the bottom end of the valve stem 2 is in movably contact with the valve core 3, a valve core guide sleeve 5 is provided on the valve core 3, and a lifting mechanism is provided on the valve stem 2, which is in conflict with the valve core guide sleeve 5 and is used to lift the valve core 3 through the valve core guide sleeve 5.

[0039] The lifting mechanism includes a circular ring 6 mounted on the valve stem 2 and a circular ring sleeve 7 sleeved on the circular ring 6 and in contact with the valve core guide sleeve 5 .

[0040] The valve stem 2 is provided with a valve stem groove 8 which is matched with the circular ring 6 , and the circular ring 6 is sleeved in the valve stem groove 8 .

[0041] Based on Example 2, this Example 4 provides a more preferred connection structure between the valve stem 2 and the annular ring 6. Specifically, the valve stem 2 is provided with a valve stem groove 8 that matches the annular ring 6, and the annular ring 6 is sleeved in the valve stem groove 8. The valve core guide sleeve 5 presses the annular sleeve 7, the annular sleeve 7 wraps the annular ring 6, and the annular ring 6 is embedded in the valve stem groove 8, thereby achieving the connection between the valve stem and the valve core. The structure is simple, stable, and the structural performance is stable, and the connection is reliable.

[0042] Example 5.

[0043] like Figure 1-Figure 7As shown, the utility model provides a new type of connection structure balanced cylinder valve, including a valve body 1, a valve stem 2, a valve core 3 and a balancing cylinder 4, and is characterized in that the bottom end of the valve stem 2 is in movably contact with the valve core 3, a valve core guide sleeve 5 is provided on the valve core 3, and a lifting mechanism is provided on the valve stem 2, which is in conflict with the valve core guide sleeve 5 and is used to lift the valve core 3 through the valve core guide sleeve 5.

[0044] The valve core guide sleeve 5 is fixedly installed on the top of the valve core 3 by screws.

[0045] Based on Example 1, this Example 5 provides a more preferred connection structure between the valve core guide sleeve 5 and the valve core 3. Specifically, the valve core guide sleeve 5 is fixedly installed on the top of the valve core 3 by screws. The structure is simple, the connection is stable and reliable, and it is convenient for maintenance.

[0046] Example 6.

[0047] like Figure 1-Figure 7 As shown, the utility model provides a new type of connection structure balanced cylinder valve, including a valve body 1, a valve stem 2, a valve core 3 and a balancing cylinder 4, and is characterized in that the bottom end of the valve stem 2 is in movably contact with the valve core 3, a valve core guide sleeve 5 is provided on the valve core 3, and a lifting mechanism is provided on the valve stem 2, which is in conflict with the valve core guide sleeve 5 and is used to lift the valve core 3 through the valve core guide sleeve 5.

[0048] The valve core 3 is provided with a contact groove 12 adapted to the valve stem 2 , and the valve stem 2 presses against the contact groove 12 when pressed downward.

[0049] Based on Example 1, this Example 6 provides a more preferred connection structure between the valve core 3 and the valve stem 2. Specifically, the valve core 3 is provided with a contact groove 12 that is compatible with the valve stem 2. When the valve stem 2 is pressed downward, it abuts against the contact groove 12. The design of the contact groove 12 can, on the one hand, serve as a guide to prevent uneven force on the valve core during downward movement after long-term use, which may cause uneven load and slip between the valve core 3 and the valve core. On the other hand, it can effectively increase the stroke of the valve core 3, thereby increasing the sealing stroke between the upper end of the valve stem 2 and the valve cylinder, which can more effectively ensure the sealing performance.

[0050] Example 7.

[0051] like Figure 1-Figure 7 As shown, the utility model provides a new type of connection structure balanced cylinder valve, including a valve body 1, a valve stem 2, a valve core 3 and a balancing cylinder 4, and is characterized in that the bottom end of the valve stem 2 is in movably contact with the valve core 3, a valve core guide sleeve 5 is provided on the valve core 3, and a lifting mechanism is provided on the valve stem 2, which is in conflict with the valve core guide sleeve 5 and is used to lift the valve core 3 through the valve core guide sleeve 5.

[0052] The valve core guide sleeve 5 is located in the balancing cylinder 4 , and a sealing member 9 is provided between the outer wall of the valve core guide sleeve 5 and the inner wall of the balancing cylinder 4 .

[0053] Based on Example 1, Example 7 provides a more preferred connection structure between the valve core guide sleeve 5 and the balancing cylinder 4. Specifically, the valve core guide sleeve 5 is located within the balancing cylinder 4, and a seal 9 is provided between the outer wall of the valve core guide sleeve 5 and the inner wall of the balancing cylinder 4. The seal 9 is preferably a sealing ring. The design of the seal 9 can effectively prevent dust in the process gas in the valve core cavity from entering the balancing cylinder cavity through the gap between the outer wall of the valve core guide sleeve 5 and the inner wall of the balancing cylinder 4, further reducing dust accumulation on the inner wall of the balancing cylinder and improving the smooth operation of the valve.

[0054] Example 8.

[0055] like Figure 1-Figure 7 As shown, the utility model provides a new type of connection structure balanced cylinder valve, including a valve body 1, a valve stem 2, a valve core 3 and a balancing cylinder 4, and is characterized in that the bottom end of the valve stem 2 is in movably contact with the valve core 3, a valve core guide sleeve 5 is provided on the valve core 3, and a lifting mechanism is provided on the valve stem 2, which is in conflict with the valve core guide sleeve 5 and is used to lift the valve core 3 through the valve core guide sleeve 5.

[0056] The valve core guide sleeve 5 is located in the balancing cylinder 4 , and a sealing member 9 is provided between the outer wall of the valve core guide sleeve 5 and the inner wall of the balancing cylinder 4 .

[0057] The valve core guide sleeve 5 divides the cavity formed by the valve core 3 and the balance cylinder 4 into a balance cylinder cavity 10 located above the valve core guide sleeve 5 and a valve core cavity 11 located below the valve core guide sleeve 5 . The lifting mechanism is located in the valve core cavity 11 .

[0058] Based on Example 7, this Example 8 provides a more preferred structure among the valve core guide sleeve 5, the valve core 3, and the balancing cylinder 4. Specifically, the valve core guide sleeve 5 divides the cavity formed by the valve core 3 and the balancing cylinder 4 into a balancing cylinder cavity 10 located above the valve core guide sleeve 5 and a valve core cavity 11 located below the valve core guide sleeve 5, and the lifting mechanism is located in the valve core cavity 11. The valve core guide sleeve 5 divides the balancing cylinder and the valve core into two cavities, namely the balancing cylinder cavity 10 and the valve core cavity 11. The process gas first enters the valve core cavity. The valve core guide sleeve adopts a turning small hole design, and a small gap design is adopted between the annular sleeve and the inner wall of the valve core cavity. The dust in the process gas is retained in the valve core cavity to the greatest extent, ensuring that the process gas entering the balancing cylinder cavity contains less dust, reducing the possibility of dust accumulation on the inner wall of the balancing cylinder, and improving the smooth operation of the valve.

[0059] The utility model discloses a new type of connection structure balance cylinder valve, which solves the technical problem that in the prior art valve balance cylinder, during the high-frequency switching and lifting movement, dust accumulates in the balance cylinder, causing the valve to become stuck and the valve stem to break, resulting in process gas leakage from both ends of the valve body, affecting the smooth operation of the device. In severe cases, it may cause the device to stop, resulting in huge losses and affecting the long-term stable operation of the device. The utility model includes a valve body, a balance cylinder, a valve stem, a valve core, a valve core guide sleeve, a ring and a ring sleeve. The valve core guide sleeve is connected to the upper end of the valve core by screws, the valve core guide sleeve presses the ring sleeve, the ring sleeve wraps the ring, and the ring is embedded in the valve stem groove to achieve the connection between the valve stem and the valve core. During the upward movement, the upper end of the valve core is subjected to force and is closer to the positioning shaft sleeve, making the switching more stable. The overall diameter of the valve stem of this structure is larger and the strength is more reliable.

[0060] When the valve is opened and moves upward, the annular ring is subjected to force, driving the annular sleeve and the valve core guide sleeve to lift the valve core upward. When the valve is closed and moves downward, the annular ring is not subjected to force, and the lower end of the valve stem contacts the valve core, pushing the valve core downward.

[0061] The valve core guide sleeve divides the balance cylinder and the valve core into two cavities. The process gas enters the valve core cavity first. The valve core guide sleeve adopts a turning small hole design, and the semi-circular ring sleeve and the inner wall of the valve core adopt a small gap design, which retains the dust in the process gas in the valve core cavity to the maximum extent, ensuring that the process gas entering the balance cylinder cavity has less dust content, reducing the possibility of dust accumulation on the inner wall of the balance cylinder, and improving the stability of valve operation.

[0062] Finally, it should be noted that the above embodiments are merely preferred embodiments of the present invention and are intended to illustrate the technical solutions of the present invention, rather than to limit them, and certainly not to limit the patent scope of the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention. In other words, any changes or embellishments made to the main design concept and spirit of the present invention that have no substantive significance, provided that the technical problems they solve are still consistent with those of the present invention, should be included in the protection scope of the present invention. In addition, the direct or indirect application of the technical solutions of the present invention in other related technical fields should also be included in the patent protection scope of the present invention.

Claims

1. A novel connection structure balance cylinder valve, comprising a valve body (1), a valve stem (2), a valve core (3) and a balance cylinder (4), characterized in that: The bottom end of the valve stem (2) is in active contact with the valve core (3), a valve core guide sleeve (5) is provided on the valve core (3), and a lifting mechanism is provided on the valve stem (2) and contacts the valve core guide sleeve (5) for lifting the valve core (3) through the valve core guide sleeve (5).

2. A new type of connection structure balanced cylinder valve according to claim 1, characterized in that: The lifting mechanism comprises a circular ring (6) mounted on the valve stem (2), and a circular ring sleeve (7) sleeved on the circular ring (6) and in conflict with the valve core guide sleeve (5).

3. A novel connection structure balanced cylinder valve according to claim 2, characterized in that: The outer wall of the annular sleeve (7) and the inner wall of the valve core (3) are clearance-matched, and the clearance between the two is 0.5-1 mm.

4. A novel connection structure balanced cylinder valve according to claim 2, characterized in that: The valve stem (2) is provided with a valve stem groove (8) adapted to the circular ring (6), and the circular ring (6) is sleeved in the valve stem groove (8).

5. A new type of connection structure balanced cylinder valve according to claim 1, characterized in that: The valve core guide sleeve (5) is fixedly installed on the top of the valve core (3) by screws.

6. A novel connection structure balanced cylinder valve according to claim 1, characterized in that: The valve core (3) is provided with a contact groove (12) adapted to the valve stem (2), and the valve stem (2) presses against the contact groove (12) when pressed downward.

7. A new type of connection structure balanced cylinder valve according to claim 1, characterized in that: The valve core guide sleeve (5) is located in the balance cylinder (4), and a sealing member (9) is provided between the outer wall of the valve core guide sleeve (5) and the inner wall of the balance cylinder (4).

8. A novel connection structure balanced cylinder valve according to claim 7, characterized in that: The valve core guide sleeve (5) divides the cavity formed by the valve core (3) and the balance cylinder (4) into a balance cylinder cavity (10) located above the valve core guide sleeve (5) and a valve core cavity (11) located below the valve core guide sleeve (5), and the lifting mechanism is located in the valve core cavity (11).

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