A centrifugal refrigeration machine safety valve dismounting device

Abstract

The utility model belongs to special equipment dismantling technical field, concretely relates to a centrifugal refrigerating machine safety valve dismantling device, including drive tool and sleeve body, drive tool is provided with drive connecting head, one end of sleeve body is provided with connecting portion, connecting portion is provided with connecting slot, connecting slot is inserted with drive connecting head, the other end inner wall of sleeve body is provided with fixed joint butt joint portion, fixed joint butt joint portion can be inserted on safety valve, the outer wall of one end of sleeve body near fixed joint butt joint portion is provided with gap portion, the gap portion is when safety valve is inserted in fixed joint butt joint portion, and the lead seal on safety valve is passed, so that the drive of drive tool to sleeve body can dismantle safety valve, and protect the lead seal well, in this application, the lead seal of safety valve, installation position has carried out the unique avoidance design, can save time and labour, nondestructive dismantling safety valve, and the practicality is high.

Description

Technical Field

[0001] This utility model belongs to the field of special equipment disassembly technology, specifically relating to a disassembly device for a centrifugal refrigeration unit safety valve. Background Technology

[0002] Centrifugal chillers in the cigarette factory's power workshop produce low-temperature chilled water (typically with an outlet temperature of 6-7°C), which is then pumped and piped to various production workshops. This provides the necessary constant temperature and humidity environment for the tobacco processing and packaging workshops, contributing to the production of high-quality, highly consistent cigarette products. It also cools many pieces of equipment within the workshops, such as high-speed cigarette rolling machines and packaging machines, which generate significant heat during continuous operation. Chilled water circulation is needed to cool the hydraulic and electrical control systems of these machines, ensuring long-term stable operation and preventing overheating shutdowns. Simultaneously, it is used for process cooling: in certain stages of the tobacco processing line, such as sheet baking and fluidized bed cooling, rapid and precise cooling and shaping of the tobacco is required to lock in aroma and moisture. Furthermore, it provides stable, reliable, and uninterrupted cooling for the 24-hour operation of the cigarette factory's central control system and machine room.

[0003] According to relevant regulations, the protective devices installed on these centrifugal chillers need to be inspected periodically (generally at least once a year). In practice, it was found that the safety valve of this chiller is located at the top of the cooler and evaporator, surrounded by various equipment, which hinders maintenance personnel from directly disassembling it with a wrench. In addition, the upper and lower hexagonal plates on the safety valve body are sealed with lead seals, making it impossible to directly disassemble the safety valve with ordinary disassembly tools. If forced disassembly is attempted, the lead seals will be damaged, delaying the inspection. Utility Model Content

[0004] The purpose of this invention is to provide a disassembly device for a centrifugal refrigeration unit's safety valve. This device is adaptable to the installation location of the safety valve, enabling safe and efficient disassembly without damaging the lead seal or valve body structure, thus ensuring the safety valve can be sent for periodic inspection. This solves the problem mentioned in the background art that existing tools cannot efficiently and non-destructively disassemble the safety valve.

[0005] To achieve the above-mentioned technical objectives, the technical solution adopted by this utility model is as follows:

[0006] A centrifugal refrigeration unit safety valve disassembly device includes a driving tool and a sleeve body. The driving tool is provided with a driving connector. One end of the sleeve body is provided with a connecting portion, and the connecting portion is provided with a connecting slot, which is inserted into the driving connector. The inner wall of the other end of the sleeve body is provided with a fixing part mating portion, which can be sleeved on the safety valve. The outer wall of the end of the sleeve body near the fixing part mating portion is provided with a gap, which allows the lead seal on the safety valve to pass through when the safety valve is sleeved on the fixing part mating portion, so that the driving tool can disassemble the safety valve by driving the sleeve body.

[0007] In this invention, when the safety valve installed on the centrifugal chiller needs to be calibrated, first, the sleeve body is slipped off the top of the safety valve, and the mating part of the fixing part is aligned with the nut (or lower hexagon) on the safety valve. Then, a driving tool is held and its driving connector is inserted into the connecting slot of the sleeve body. The sleeve body is rotated to loosen the nut of the safety valve. The safety valve is then removed for inspection. During the fitting process, the gap provides sufficient clearance for the lead seals on the upper and lower hexagons of the safety valve, preventing the sleeve body from squeezing the lead seals and causing damage that would affect the inspection. Furthermore, after calibration, the structure of the sleeve body does not affect the screwing in of the lower hexagon when the safety valve is installed on the centrifugal chiller, thus not affecting the installation of the calibrated safety valve. Disassembly and installation are both convenient and easy; the structure of the safety valve and the lead seals are not damaged during disassembly and assembly.

[0008] Furthermore, the driving tool is a wrench, and the driving connector is fixedly located in the middle of the wrench; the connecting slot is a square groove, and the driving connector is adapted to the shape of the square groove. This solves the problem of difficult disassembly of the safety valve in the existing centrifugal chiller's structural design, achieving labor-saving, efficient, and intact disassembly while protecting the safety valve.

[0009] Furthermore, the fastener mating portion includes a non-circular mating hole and a receiving cavity that communicate with each other. The non-circular mating hole is located on the inner wall of the bottom end of the sleeve body, and the receiving cavity is located in the middle section of the sleeve body. The inner diameter of the receiving cavity is greater than or equal to the diameter of the circumscribed circle of the non-circular mating hole; thus, regardless of whether the upper and lower hexagons of the safety valve are aligned, the sleeve body can be safely and without damage fitted onto the lower hexagon, and the valve body of the safety valve can be inserted into the receiving cavity.

[0010] In this way, the lower hexagonal socket (or lower hexagonal nut) of the safety valve can be easily connected via a non-circular mating hole, and the receiving cavity can accommodate the valve body of the safety valve; thus smoothly achieving the fitting of the sleeve body. The non-circular mating hole can be an internal hexagonal socket. This device adopts a purely mechanical structure, which is low in cost and highly reliable; it is convenient and labor-saving during use, allowing for easy and damage-free disassembly of the safety valve.

[0011] Furthermore, the gap includes a notch, which is formed at one end of the sleeve body near the fastener connection and extends through the lower end face of the sleeve body.

[0012] Furthermore, the connecting part is also provided with an annular groove, on which two opposing through holes are formed, and the through holes are connected to the connecting slot.

[0013] Furthermore, a rotating ring is provided on the outer ring of the annular groove, and a locking block is slidably installed in the through hole. The locking block is connected to the rotating ring in a driving manner. The bottom wall of the inner end of the locking block is set as a plane, and the top wall is set as an inclined plane. A locking groove is opened on the wall surface corresponding to the through hole of the drive connector. When the drive connector is inserted into the connection slot, the locking block extends into the locking groove. The locking block and the drive connector are magnetically attracted to each other. Moreover, the locking block can be pulled out of the locking groove by the rotation of the rotating ring. In this way, by locking the drive connector, after the safety valve is disassembled, the sleeve body can be pulled out together with a hand wrench, which simplifies the disassembly and assembly steps, improves efficiency, and avoids the sleeve body from accidentally coming out and damaging other equipment.

[0014] The utility model adopting the above technical solution has the following advantages:

[0015] In this application, for the safety valve installed on a centrifugal refrigeration unit, the upper and lower hexagonal joints of the valve body are sealed with lead seals to prevent unauthorized pressure adjustment or disassembly. These lead seals also interfere with the normal sleeve connection, making it impossible to disassemble and send the safety valve for inspection. Therefore, this device features a uniquely designed gap in the sleeve body. This gap allows the lead seal to pass through during sleeve connection without the possibility of the inner wall of the sleeve body compressing the lead seal, thus protecting it. This ensures that disassembly of the safety valve does not affect its inspection. This design facilitates disassembly, ensures high mechanical reliability, and saves time and effort for maintenance personnel. Furthermore, the safety valve's safety accessories are not damaged during disassembly. Attached Figure Description

[0016] This utility model can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0017] Figure 1This is one of the structural schematic diagrams of an embodiment of a centrifugal refrigeration unit safety valve disassembly device according to the present invention;

[0018] Figure 2 This is a second schematic diagram of an embodiment of the centrifugal refrigeration machine safety valve disassembly device of this utility model;

[0019] Figure 3 This is the third schematic diagram of an embodiment of the centrifugal refrigeration machine safety valve disassembly device of this utility model;

[0020] Figure 4 This is a right view of an embodiment of the centrifugal refrigeration unit safety valve disassembly device of this utility model;

[0021] Figure 5 for Figure 4 Schematic diagram of the cross-sectional structure along the AA direction;

[0022] Figure 6 This is a partial cross-sectional structural schematic diagram of another embodiment of the centrifugal refrigeration machine safety valve disassembly device of this utility model;

[0023] The symbols for the main components are explained below:

[0024] 101. Wrench; 102. Sleeve body; 103. Gap; 104. Drive connector; 105. Connecting part; 1051. Connecting slot; 1052. Through hole; 1053. Annular groove; 1054. Rotating ring; 1055. Flexible part; 1056. Locking block; 1057. Locking groove; 106. Fixing part mating part; 107. Receiving cavity; 108. Transition channel. Detailed Implementation

[0025] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that similar or identical parts are referred to by the same reference numerals in the drawings or description. Implementations not shown or described in the drawings are forms known to those skilled in the art. Furthermore, directional terms mentioned in the embodiments, such as "up," "down," "top," "bottom," "left," "right," "front," and "back," are only for reference to the directions in the drawings and are not intended to limit the scope of protection of the present invention.

[0026] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0027] like Figures 1 to 5 As shown, in one embodiment, a centrifugal chiller safety valve disassembly device includes a driving tool and a sleeve body 102. The driving tool is provided with a driving connector 104. One end of the sleeve body 102 is provided with a connecting part 105, and the connecting part 105 is provided with a connecting slot 1051, which is inserted into the driving connector 104. The inner wall of the other end of the sleeve body 102 is provided with a fixing part docking part 106, which can be sleeved on the safety valve. The outer wall of the bottom end of the sleeve body 102 is provided with a gap 103, which allows the lead seal on the safety valve to pass through when the fixing part docking part 106 is sleeved on the safety valve, so that the driving tool can disassemble the safety valve by driving the sleeve body 102.

[0028] In this embodiment, the driving tool can be a wrench 101, with a driving connector 104 welded to the middle side wall of the wrench 101. The connecting slot 1051 is a square groove, and the driving connector 104 is adapted to the shape of the square groove, both being square. In this embodiment, the fixing part 106 includes a non-circular mating hole and a receiving cavity 107 that are interconnected. The non-circular mating hole is located on the bottom inner wall of the sleeve body 102, and the receiving cavity 107 is located in the middle section of the sleeve body 102. In practice, the non-circular mating hole can be an internal hexagonal hole, which matches the lower hexagonal nut on the safety valve. In this embodiment, the driving tool can be an electric wrench, and the driving connector 104 can be a square plug that plugs into the driving output end of the electric wrench.

[0029] In fact, the inner diameter of the receiving cavity 107 is greater than or equal to the diameter of the circumscribed circle of the non-circular mating hole. Specifically, the non-circular mating hole uses an internal hexagonal hole, and the receiving cavity is a circular hole machined into the sleeve body 102; the circumscribed circle diameter of the internal hexagonal hole is smaller than the diameter of the circular hole; this facilitates the insertion of the upper hexagon on the valve body, and during insertion, regardless of whether the upper and lower hexagons are aligned, they do not contact the wall surface of the receiving cavity 107. No contact also occurs during the rotation of the sleeve body 102, thus protecting the valve body. The cross-sectional structure of the receiving cavity 107 matches the valve body structure of the safety valve, enabling the sleeve body 102 to accommodate the valve body while also possessing sufficient structural strength.

[0030] The working process of this embodiment is as follows: When the safety valve on the centrifugal chiller needs to be disassembled for verification, firstly, the sleeve body 102 is slipped off the top of the safety valve, and the fixing part 106 is aligned with the nut on the safety valve; then, holding the wrench 101, the drive connector 104 is inserted into the connecting slot 1051 of the sleeve body 102, and the sleeve body 102 is rotated to unscrew the lower hexagon of the safety valve; the function of the lower hexagon of the safety valve is to fix the safety valve to the centrifugal chiller. Additionally, the function of the upper hexagon of the safety valve is to adjust the preload pressure of the valve stem (or the trigger pressure threshold of the safety valve). This allows for convenient and quick removal of the safety valve. During disassembly, because a gap 103 is specifically provided in the sleeve body 102, the sleeve body 102 can be slipped off without compressing the lead seal, allowing the fixing part 106 to align with the lower hexagon on the safety valve; furthermore, the lead seal is not damaged during the rotation of the sleeve body 102.

[0031] In this embodiment, the gap 103 includes a notch, which is formed at one end of the sleeve body 102 near the fastener connection 106 and penetrates the lower end face of the sleeve body 102.

[0032] In fact, the notch is a vertical rectangular groove, used as the first notch; a second notch, which is semi-circular, is formed at the top of the first notch. The total length of the first and second notches is greater than the vertical projection length of the safety valve's lead seal. The edges of the first and second notches are chamfered. Furthermore, the top of the receiving cavity 107 does not penetrate the end face of the sleeve body 102; the depth of the receiving cavity 107 is greater than the total height of the safety valve. The valve body of the safety valve can be completely accommodated by the receiving cavity 107.

[0033] In fact, the width of the first notch is equal to the width of one side of the internal hexagonal hole, which is beneficial for the machining of the sleeve body; the width of the first notch and the second notch are the same.

[0034] In this embodiment, the connecting part 105 is also provided with an annular groove 1053, and two opposing through holes 1052 are formed on the annular groove 1053, which are connected to the connecting slot 1051.

[0035] In practice, this embodiment can accommodate a spring plunger within the through hole 1052 as needed. The spring plunger can move relative to the through hole, and a limiting groove is formed on the wall surface corresponding to the through hole 1052 of the drive connector 104. When the drive connector 104 is inserted into the connection slot 1051, the spring plunger is embedded in the limiting groove. The limiting groove is semi-circular; half of the spring plunger protrudes from the through hole 1052 and is embedded in the limiting groove. When the wrench 101 needs to be removed, it can be pulled out with appropriate force. The spring plunger provides damping but will not jam the wrench 101.

[0036] In fact, such as Figure 6 As shown, in this embodiment, a rotating ring 1054 can be provided on the outer side of the annular groove 1053 as needed, and a locking block 1056 is slidably installed in the through hole 1052. The locking block 1056 is connected to the rotating ring 1054 in a transmission manner. The bottom wall of the locking block 1056 away from the rotating ring 1054 is set as a plane, and the top wall is set as an inclined surface. The drive connector 104 and the wall corresponding to the through hole 1052 are vertically provided with a locking groove 1057. The locking block 1056 and the drive connector 104 are magnetically attracted to each other. When the drive connector 104 is inserted into the connection slot 1051, the locking block 1056 extends into the locking groove 1057. Furthermore, the locking block 1056 can be pulled out of the locking groove 1057 by the rotation of the rotating ring 1054.

[0037] The locking block 1056 has a magnetic side facing the connecting slot 1051, which can be achieved by welding a magnet. The connection between the locking block 1056 and the rotating ring 1054 can be achieved by a steel wire, which can be used as a flexible component 1055. The drive connector 104 is made of magnetically attracted alloy steel. Based on the magnetic attraction function, when the drive connector 104 is inserted into the connecting slot 1051, the locking block 1056 is first pushed outward by its inclined surface, and then affected by the magnetic reaction force, it extends into the locking groove 1057 to lock and limit the wrench 101. After that, after the safety valve is unloaded, the sleeve body 102 can be removed together with the wrench 101, which is convenient, quick and highly practical. In addition, when it is necessary to separate the wrench 101 from the socket body 102, simply rotate the rotating ring 1054 in any direction of rotation, and pull the locking block 1056 out of the locking groove 1057 through the flexible part 1055 to separate the wrench 101, which is convenient to operate.

[0038] In fact, a transition channel 108 is provided between the connecting slot 1051 and the receiving cavity 107; the transition channel 108 can be part of the connecting slot 1051 or the receiving cavity 107, for the insertion of the safety valve or the extension of the drive connector. The connecting slot 1051, the transition channel 108 and the receiving cavity 107 are connected in sequence, which also facilitates the processing and forming of the sleeve body 102.

[0039] The above provides a detailed description of a centrifugal refrigeration unit safety valve disassembly device provided by this utility model. The specific embodiments are described only to aid in understanding the method and core concept of this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A centrifugal refrigeration unit safety valve disassembly device, comprising a driving tool and a sleeve body (102), characterized in that, The driving tool is provided with a driving connector (104), and one end of the sleeve body (102) is provided with a connecting part (105). The connecting part (105) is provided with a connecting slot (1051), and the connecting slot (1051) is inserted into the driving connector (104). The inner wall of the other end of the sleeve body (102) is provided with a fixing part docking part (106), which can be sleeved on the safety valve. A gap (103) is opened on the outer wall of the end of the sleeve body (102) near the fixing part docking part (106). The gap (103) allows the lead seal on the safety valve to pass through when the fixing part docking part (106) is sleeved on the safety valve.

2. The centrifugal refrigeration unit safety valve disassembly device according to claim 1, characterized in that, The driving tool is a wrench (101), and the driving connector (104) is fixedly disposed in the middle of the wrench (101); the connecting slot (1051) is a square slot, and the driving connector (104) is adapted to the shape of the square slot.

3. The centrifugal refrigeration unit safety valve disassembly device according to claim 1, characterized in that, The fastener docking part (106) includes a non-circular docking hole and a receiving cavity (107) that are interconnected. The non-circular docking hole is located on the inner wall of the bottom end of the sleeve body (102), and the receiving cavity (107) is located in the middle section of the sleeve body (102).

4. The centrifugal refrigeration unit safety valve disassembly device according to claim 3, characterized in that, The inner diameter of the receiving cavity is greater than or equal to the diameter of the circumcircle of the non-circular mating hole.

5. The centrifugal chiller safety valve disassembly device according to claim 4, characterized in that, The gap (103) includes a notch, which is formed at one end of the sleeve body (102) near the fastener docking part (106) and extends through the lower end face of the sleeve body (102).

6. The centrifugal refrigeration unit safety valve disassembly device according to claim 1, characterized in that, The connecting part (105) is also provided with an annular groove (1053), and two opposing through holes (1052) are opened on the annular groove (1053), and the through holes (1052) are connected to the connecting slot (1051).

7. The centrifugal chiller safety valve disassembly device according to claim 6, characterized in that, A rotating ring (1054) is provided on the outer side of the annular groove (1053), and a locking block (1056) is slidably installed in the through hole (1052). The locking block (1056) is connected to the rotating ring (1054) in a transmission manner. The bottom wall of the inner end of the locking block (1056) is set as a plane and the top wall is set as an inclined plane. The drive connector (104) has a locking groove (1057) on the wall corresponding to the through hole (1052). The locking block (1056) and the drive connector (104) are magnetically attracted to each other. When the drive connector (104) is inserted into the connection slot (1051), the locking block (1056) extends into the locking groove (1057). Furthermore, the locking block (1056) can be pulled out of the locking groove (1057) by the rotation of the rotating ring (1054).

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