Vacuum interface valve

Abstract

The invention discloses a vacuum interface valve, and relates to the technical field of vacuum valves, the vacuum interface valve comprises a valve body, a valve bag is installed in the valve body, the end portion of the valve bag is fixedly connected with a valve seat, the end, located on the valve bag, of the valve seat is fixedly connected with a sliding cylinder, and the inner wall of the sliding cylinder is slidably connected with a limiting cylinder; the end, away from the sliding cylinder, of the limiting cylinder is fixedly connected with a valve deck, a first spring is arranged between the valve deck and the valve seat, the two ends of the first spring are fixedly connected with the ends, opposite to the valve seat, of the valve deck correspondingly, and air pipe connectors are installed on the outer surface of the valve body and the outer surface of the valve deck correspondingly. The valve seat is pushed to block the port of the valve body when the spring in the vacuum interface valve is fatigued, so that the fault risk caused by performance reduction of the spring in the using process of the valve can be effectively reduced, the stability and reliability of the vacuum interface valve in long-time operation are ensured, in addition, the valve can be tightly attached when closed, and the service life of the valve is prolonged. And the sealing performance of a vacuum degree valve of the system is maintained.

Description

Technical Field

[0001] The present invention relates to the technical field of vacuum valves, and in particular, to a vacuum interface valve. Background Art

[0002] A vacuum interface valve is a valve that combines various mechanical transmissions, seals, and vacuum fluid process principles to achieve the vacuum transportation control of the pumped medium, and the vacuum interface valve can be widely applied to vacuum drainage and sewage systems; However, after the existing vacuum interface valve is used for a long time, the spring inside it bears alternating stress during the repeated stretching and compression processes. This stress will cause the microcracks inside the material to gradually expand, eventually leading to fatigue failure. After the spring is fatigued, the spring cannot provide enough pre-tightening force to maintain the seal of the valve, resulting in insufficient contact pressure between the sealing component and the valve body, thereby causing leakage of the valve.

[0003] To solve the above problems, a vacuum interface valve is proposed. Summary of the Invention

[0004] To solve the above technical problems, a vacuum interface valve is provided, and this technical solution solves the problems raised in the above background art.

[0005] To achieve the above object, the present invention can adopt the following technical solutions: The present invention provides a vacuum interface valve, which includes a valve body. A valve bladder is installed inside the valve body. One end of the valve bladder is fixedly connected with a valve seat. One end of the valve seat located at the valve bladder is fixedly connected with a sliding cylinder. A limiting cylinder is slidably connected to the inner wall of the sliding cylinder. One end of the limiting cylinder away from the sliding cylinder is fixedly connected with a valve cover. A first spring is arranged between the valve cover and the valve seat. Two ends of the first spring are respectively fixedly connected with opposite ends of the valve cover and the valve seat. Air pipe connectors are installed on the outer surfaces of the valve body and the valve cover. A pushing component is arranged on the valve seat; The pushing component includes a push rod fixedly connected to the end of the valve seat. A threaded rod is internally threaded at one end of the push rod away from the valve seat. One end of the threaded rod away from the push rod is fixedly connected with a rotating rod: Further, the first spring is sleeved outside the sliding cylinder and the limiting cylinder. The push rod is arranged inside the sliding cylinder, and the outer surface diameters of the push rod, the threaded rod, and the rotating rod are all smaller than the inner wall diameter of the limiting cylinder.

[0006] Further, a driving component is arranged on the outer surface of the rotating rod. The driving component includes an adjusting bolt slidably connected to one end of the valve cover away from the valve body. A sleeve rod is fixedly connected to one end of the adjusting bolt located at the valve cover. Two limiting grooves are formed on the outer surface of the sleeve rod. Two limiting blocks are slidably connected to the two limiting grooves respectively.

[0007] Furthermore, the opposite ends of the two limiting blocks are fixedly connected to the outer surface of the rotating rod. The sleeve rod is arranged in the limiting cylinder, and the inner wall diameter of the sleeve rod is larger than the outer surface diameters of the push rod, threaded rod and rotating rod.

[0008] Furthermore, a blocking assembly is provided on the inner wall of the limiting cylinder, and the blocking assembly includes a trumpet tube fixedly connected to one end of the limiting cylinder away from the valve cover. The inner wall of the trumpet tube is abutted by two baffles, and the opposite ends of the two baffles are fixedly connected with blocking rods, and the outer surfaces of the two blocking rods are both provided with spring 2.

[0009] Furthermore, the two blocking rods are vertically slidably connected to the sleeve rod, and the two ends of the second spring are respectively fixedly connected to the baffle and the end opposite to the outer surface of the sleeve rod.

[0010] Furthermore, a sealing assembly is provided on the outer surface of the adjusting bolt, and the sealing assembly includes a sealing disk slidably connected to the outer surface of the adjusting bolt, a sealing groove is opened at the end of the sealing disk, and a sealing ring is provided inside the sealing groove.

[0011] Furthermore, the sealing disc and the valve cover are fixedly connected, and the sealing ring and the outer surface of the adjusting bolt are fixedly connected.

[0012] Furthermore, a plurality of mounting holes are provided in a circular array on the outer surface of the valve cover, and a plurality of mounting seats are fixedly connected to the outer surface of the valve body at positions corresponding to the plurality of mounting holes, and the plurality of mounting holes and the plurality of mounting seats are connected by fastening bolts.

[0013] As described above, the characteristics and advantages of a vacuum interface valve in the present invention are: By pushing the valve seat to block the port of the valve body when the spring inside the vacuum interface valve is fatigued, the risk of failure caused by the degradation of spring performance during valve use can be effectively reduced, ensuring the stability and reliability of the vacuum interface valve during long-term operation. In addition, it can ensure that the valve can fit tightly when closed, maintaining the vacuum degree of the system and the sealing of the valve; The detachable design between the valve body and valve cover allows for quick maintenance and replacement of the internal components of the vacuum interface valve. Furthermore, the wear of internal parts can be checked more intuitively, potential problems can be discovered in a timely manner, and system failures caused by internal faults can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of the vacuum interface valve shown in the present invention; Figure 2 This is a schematic diagram of the internal structure of the vacuum interface valve shown in the present invention; Figure 3 This is a schematic diagram of the valve bag and valve seat structure of the vacuum interface valve shown in the present invention; Figure 4Schematic diagram of the drive assembly and the blocking assembly of the vacuum interface valve shown in the present invention; Figure 5 For the present invention Figure 4 Partial enlarged view of part A in the present invention; Figure 6 Schematic diagram of the connection structure between the rotating rod and the sleeve rod of the vacuum interface valve shown in the present invention; Figure 7 Schematic diagram of the disassembled structure between the valve cover and the valve body of the vacuum interface valve shown in the present invention.

[0015] Among them, the reference numerals in the present invention are: 1, valve body; 2, valve bladder; 3, valve seat; 4, sliding cylinder; 5, limiting cylinder; 6, valve cover; 7, first spring; 8, air pipe joint; Pushing assembly: 91, push rod; 92, threaded rod; 93, rotating rod; Drive assembly: 101, adjusting bolt; 102, sleeve rod; 103, limiting groove; 104, limiting block; Blocking assembly: 111, bell tube; 112, baffle; 113, blocking rod; 114, second spring; Sealing assembly: 121, sealing disc; 122, sealing groove; 123, sealing ring; 13, mounting hole; 14, mounting seat; 15, fastening bolt. Detailed implementation manner

[0016] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0017] Refer to Figures 1 to 7 As shown, for the embodiment of the present invention, a vacuum interface valve provided will be elaborated in detail below: It includes a valve body 1, a valve bladder 2 is installed inside the valve body 1, a valve seat 3 is fixedly connected to the end of the valve bladder 2, a sliding cylinder 4 is fixedly connected to one end of the valve seat 3 located in the valve bladder 2, a limiting cylinder 5 is slidably connected to the inner wall of the sliding cylinder 4, a valve cover 6 is fixedly connected to the end of the limiting cylinder 5 away from the sliding cylinder 4, a first spring 7 is arranged between the valve cover 6 and the valve seat 3, and both ends of the first spring 7 are fixedly connected to the opposite ends of the valve cover 6 and the valve seat 3 respectively. Air pipe joints 8 are installed on the outer surfaces of the valve body 1 and the valve cover 6, and a pushing assembly is arranged on the valve seat 3; The pushing assembly includes a push rod 91 fixedly connected to the end of the valve seat 3. A threaded rod 92 is threadedly connected inside the end of the push rod 91 away from the valve seat 3, and a rotating rod 93 is fixedly connected to the end of the threaded rod 92 away from the push rod 91.

[0018] Further, a first spring 7 is sleeved outside the sliding cylinder 4 and the limiting cylinder 5. A push rod 91 is arranged inside the sliding cylinder 4, and the outer surface diameters of the push rod 91, the threaded rod 92 and the rotating rod 93 are all smaller than the inner wall diameter of the limiting cylinder 5.

[0019] Further, a driving assembly is arranged on the outer surface of the rotating rod 93. The driving assembly includes an adjusting bolt 101 which is slidably connected to one end of the valve cover 6 away from the valve body 1. A sleeve rod 102 is fixedly connected to one end of the adjusting bolt 101 located inside the valve cover 6. Two limiting grooves 103 are formed on the outer surface of the sleeve rod 102, and two limiting blocks 104 are slidably connected inside the two limiting grooves 103 respectively.

[0020] Further, the opposite ends of the two limiting blocks 104 are fixedly connected to the outer surface of the rotating rod 93 together. The sleeve rod 102 is arranged inside the limiting cylinder 5. The inner wall diameter of the sleeve rod 102 is larger than the outer surface diameters of the push rod 91, the threaded rod 92 and the rotating rod 93. In this way, the rotating rod 93 can not only slide inside the sleeve rod 102, but also the sleeve rod 102 can transmit power to the rotating rod 93 during rotation. At the same time, when opening the vacuum interface valve, when the valve seat 3 slides towards the valve cover 6, the push rod 91, the threaded rod 92 and the rotating rod 93 can slide inside the sleeve rod 102 without affecting the normal operation of the vacuum interface valve.

[0021] Further, a blocking assembly is arranged on the inner wall of the limiting cylinder 5. The blocking assembly includes a horn-shaped pipe 111 fixedly connected to one end of the limiting cylinder 5 away from the valve cover 6. Two baffle plates 112 are abutted against the inner wall of the horn-shaped pipe 111. Opposite ends of the two baffle plates 112 are fixedly connected with blocking rods 113 respectively. Two second springs 114 are sleeved on the outer surfaces of the two blocking rods 113 respectively. The inner wall of the horn-shaped pipe 111 is arranged in a frustum shape, so that the inner wall of the horn-shaped pipe 111 is in an arc inclined shape. The position with the largest inner wall diameter of the horn-shaped pipe 111 is the end away from the limiting cylinder 5, and the position with the smallest inner wall diameter is the end connected to the limiting cylinder 5. In this way, the inner wall of the horn-shaped pipe 111 is arranged to gradually become smaller from large towards the valve cover 6, and the inner wall diameter of the horn-shaped pipe 111 is the same as the inner wall diameter of the limiting cylinder 5 when it is the smallest.

[0022] Further, the two blocking rods 113 are both vertically slidably connected with the sleeve rod 102. Two ends of the second spring 114 are fixedly connected to the baffle plate 112 and the opposite end of the outer surface of the sleeve rod 102 respectively.

[0023] Further, a sealing assembly is arranged on the outer surface of the adjusting bolt 101. The sealing assembly includes a sealing disc 121 slidably connected to the outer surface of the adjusting bolt 101. A sealing groove 122 is formed at the end of the sealing disc 121, and a sealing ring 123 is arranged inside the sealing groove 122.

[0024] Furthermore, the sealing disk 121 is fixedly connected to the valve cover 6, and the sealing ring 123 is fixedly connected to the outer surface of the adjusting bolt 101. The sealing ring 123 is made of rubber. In this way, by utilizing the strong plasticity of the rubber material, when the adjusting bolt 101 squeezes the sealing ring 123 and embeds it into the sealing groove 122, the sealing ring 123 will overflow and wrap around the adjusting bolt 101, which not only increases the sealing performance of the vacuum interface valve, but also increases the friction between the adjusting bolt 101 and the valve cover 6 and the sealing disk 121, so that the adjusting bolt 101 and the valve cover 6 and the sealing disk 121 have a self-locking function, so that the adjusting bolt 101 will not rotate when there is no strong external force.

[0025] Furthermore, a plurality of mounting holes 13 are provided in a circular array on the outer surface of the valve cover 6, and a plurality of mounting seats 14 are fixedly connected to the outer surface of the valve body 1 at positions corresponding to the plurality of mounting holes 13. The plurality of mounting holes 13 and the plurality of mounting seats 14 are connected by fastening bolts 15. Through the detachable design between the valve body 1 and the valve cover 6, the internal components of the vacuum interface valve can be quickly maintained and replaced. In addition, the wear of the internal parts can be checked more intuitively, potential problems can be discovered in time, and system failures due to internal faults can be avoided.

[0026] In combination with the above embodiments, the entire working process and working principle of the above embodiments are as follows: The working state is: after the vacuum interface valve has been used for a long time, the spring 17 in the valve bag 2 will cause the elastic performance of the spring 17 to gradually decrease during the repeated stretching and compression process, and further make the spring 17 unable to push the valve seat 3 to the end of the valve body 1 away from the valve cover 6, so that the valve body 1 will leak. Therefore, when the spring 17 becomes fatigued and the valve seat 3 cannot reach the end away from the valve cover 6, the adjusting bolt 101 is pulled toward the end away from the valve cover 6. The adjusting bolt 101 will drive the sealing ring 123 to disengage from the sealing groove 122. In this way, when the adjusting bolt 101 is rotated, the friction between the sealing ring 123 and the sealing groove 122 can be avoided to increase the resistance to the rotation of the adjusting bolt 101, and the sealing ring 123 can also be reduced. 3 and the friction between the sealing groove 122 to prevent the sealing ring 123 from being worn and causing the sealing of the valve body 1 to drop, affecting the operation of the valve body 1. In the process of the adjusting bolt 101 moving away from the valve cover 6, the sleeve rod 102 will also slide toward the valve cover 6. At this time, the baffles 112 on the two blocking rods 113 sliding on the sleeve rod 102 will move in the bell tube 111. Since the opening of the bell tube 111 is larger than the opening for a certain distance to the inside, the inner wall of the bell tube 111 will resist the baffle 112 during the sliding process of the sleeve rod 102, so that the two baffles 112 will drive the blocking rod 113 to slide toward the inside of the sleeve rod 102, so that the blocking rod 113 will enter the interior of the sleeve rod 102 to rotate The rod 93 is blocked. At this time, rotating the adjusting bolt 101 will drive the rotating rod 93 and the threaded rod 92 to rotate in the push rod 91. Since the rotating rod 93 is resisted by the two blocking rods 113, when the rotating rod 93 drives the threaded rod 92 to rotate, the push rod 91 will push the valve seat 3 to move toward the end away from the valve body 1 along the trajectory of the threaded rod 92. When the push rod 91 pushes the valve seat 3 until the valve body 1 is no longer leaking, the valve seat 3 is re-tightened with the valve body 1. At this time, the adjusting bolt 101 is rotated in the opposite direction to drive the rotating rod 93 and the threaded rod 92 to rotate. At this time, the rotating rod 93 and the threaded rod 92 will move a distance toward the push rod 91, so that the blocking rod 113 can avoid contact with the rotating rod 93 when the adjusting bolt 101 is reset. The two valves are locked together, and the adjustment bolt 101 stops and then stops rotating, further pushing the adjustment bolt 101 to move toward the sealing disk 121. At this time, the baffle 112 will enter the position with a larger opening on the inner wall of the bell tube 111. At this time, the spring 2 114 compressed by the baffle 112 will rebound, and at the same time push the baffle 112 and the blocking rod 113 to move away from the sleeve rod 102. At this time, it is only necessary to pass negative pressure into the vacuum port in the valve body 1 through the air pipe joint 8. There are corresponding limit rods on the valve cover 6 and the valve seat 3. The spring 1 7 and the valve bag 2 are deformed and retracted. The limit rod ensures the position of the spring and the valve bag 2. The valve bag 2 retracts, the valve opens, and the pressure is relieved at the vacuum port. Under the action of the spring 1 7, the valve bag 2 extends, the valve closes, and the sewage is blocked from entering the vacuum port.This can effectively reduce the failure risk of the valve caused by the degradation of the spring performance during use, ensure the stability and reliability of the vacuum interface valve during long-term operation, and in addition, can also ensure that the valve fits tightly when closed, maintaining the vacuum degree and sealing performance of the system.

[0027] When the inside of the vacuum interface valve is damaged or needs to be maintained inside, the installation between the installation hole 13 and the installation seat 14 is released by turning the fastening bolt 15, so that the valve body 1 and the valve cover 6 can be separated, facilitating the maintenance and replacement of the internal components of the vacuum interface valve by the staff.

[0028] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0029] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vacuum interface valve, comprising a valve body (1), characterized in that, A valve body (1) is internally provided with a valve bladder (2). The end of the valve bladder (2) is fixedly connected to a valve seat (3). One end of the valve seat (3) located in the valve bladder (2) is fixedly connected to a sliding cylinder (4). A limiting cylinder (5) is slidably connected to the inner wall of the sliding cylinder (4). One end of the limiting cylinder (5) away from the sliding cylinder (4) is fixedly connected to a valve cover (6). A first spring (7) is arranged between the valve cover (6) and the valve seat (3). The two ends of the first spring (7) are respectively fixedly connected to the opposite ends of the valve cover (6) and the valve seat (3). Air pipe connectors (8) are installed on the outer surfaces of both the valve body (1) and the valve cover (6). A pushing assembly is arranged on the valve seat (3); The pushing assembly includes a push rod (91) fixedly connected to the end of the valve seat (3). A threaded rod (92) is threadedly connected to the inside of the end of the push rod (91) away from the valve seat (3). One end of the threaded rod (92) away from the push rod (91) is fixedly connected to a rotating rod (93).

2. The vacuum interface valve according to claim 1, wherein: The first spring (7) is sleeved outside the sliding cylinder (4) and the limiting cylinder (5). The push rod (91) is arranged inside the sliding cylinder (4), and the outer surface diameters of the push rod (91), the threaded rod (92), and the rotating rod (93) are all smaller than the inner wall diameter of the limiting cylinder (5).

3. The vacuum interface valve according to claim 2, characterized in that: A driving assembly is arranged on the outer surface of the rotating rod (93). The driving assembly includes an adjusting bolt (101) slidably connected to one end of the valve cover (6) away from the valve body (1). One end of the adjusting bolt (101) located in the valve cover (6) is fixedly connected to a sleeve rod (102). Two limiting grooves (103) are formed on the outer surface of the sleeve rod (102). Two limiting blocks (104) are slidably connected to both of the two limiting grooves (103).

4. A vacuum interface valve according to claim 3, characterized in that: The opposite ends of the two limiting blocks (104) are jointly fixedly connected to the outer surface of the rotating rod (93). The sleeve rod (102) is arranged inside the limiting cylinder (5), and the inner wall diameter of the sleeve rod (102) is larger than the outer surface diameters of the push rod (91), the threaded rod (92), and the rotating rod (93).

5. The vacuum interface valve according to claim 4, characterized in that: A blocking assembly is arranged on the inner wall of the limiting cylinder (5). The blocking assembly includes a horn-shaped pipe (111) fixedly connected to one end of the limiting cylinder (5) away from the valve cover (6). Two baffle plates (112) are in contact with the inner wall of the horn-shaped pipe (111). Opposite ends of the two baffle plates (112) are respectively fixedly connected to blocking rods (113). Second springs (114) are sleeved on the outer surfaces of the two blocking rods (113).

6. The vacuum interface valve according to claim 5, wherein: Both of the two blocking rods (113) are vertically slidably connected to the sleeve rod (102). The two ends of the second spring (114) are respectively fixedly connected to the baffle plate (112) and the opposite end of the outer surface of the sleeve rod (102).

7. The vacuum interface valve according to claim 6, characterized in that: A sealing assembly is arranged on the outer surface of the adjusting bolt (101). The sealing assembly includes a sealing disc (121) slidably connected to the outer surface of the adjusting bolt (101). A sealing groove (122) is formed at the end of the sealing disc (121). A sealing ring (123) is arranged inside the sealing groove (122).

8. A vacuum interface valve according to claim 7, characterized in that: The sealing disc (121) is fixedly connected to the valve cover (6), and the sealing ring (123) is fixedly connected to the outer surface of the adjusting bolt (101).

9. A vacuum interface valve according to claim 8, characterized in that: A plurality of mounting holes (13) are arranged in a circular array on the outer surface of the valve cover (6). At positions corresponding to the plurality of mounting holes (13) on the outer surface of the valve body (1), a plurality of mounting seats (14) are fixedly connected. The plurality of mounting holes (13) and the plurality of mounting seats (14) are connected by fastening bolts (15).

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