Waterproof structure based on bolt operation state monitoring device

Abstract

A waterproof structure based on a bolt operation state monitoring device comprises an alarm device body, a through hole is formed in one end of a shell of the alarm device body, and a telescopic rod penetrates through the through hole and a contact in the shell to be in sliding fit with the through hole; a sealing gasket is fixed on the telescopic rod positioned outside the shell, a contact is fixed on the telescopic rod positioned in the shell, and a spring is sleeved on the telescopic rod positioned on one side of the contact; the contact is fixed with the inner wall of the shell; every two alarm device bodies form a pair and are fixed to nuts at the two ends of the same bolt respectively, the ends of the two telescopic rods located outside the shell abut against each other, at the moment, the spring is in a compressed state, the contact does not make contact with the contact point, and the sealing gasket makes contact with the outer wall of the shell for sealing and water proofing. The spring extends and pushes the contact to move towards the contact point, so that the contact and the contact point are in contact to conduct the alarm of the alarm device body, the alarm device can be used in water or a humid environment, and the alarm device has the advantages of being waterproof, dampproof, convenient to adjust and reliable.

Description

TECHNICAL FIELD

[0001] The utility model belongs to bolt monitoring waterproof technical field relates to a kind of waterproof structure based on bolt operating condition monitoring device. BACKGROUND

[0002] Hydraulic turbine unit uses Francis turbine, and water flows successively through inlet door, pressure pipe and turbine volute, and then enters the turbine.In the water diversion components and flow components of the generator set, multiple access doors are arranged, which are fastened by bolts.Once the operating state of the bolts is abnormal, the access doors will be opened under the action of internal water pressure, causing serious accidents such as flooding of the plant.Therefore, it is necessary to monitor the operating state of the bolts in important parts fastened by bolts.

[0003] The patent with publication number CN115331398A and the title of "Intelligent monitoring device and method for worm shell access door bolt of hydroelectric generator set" is described as including a fixed seat and an alarm device connected to the fixed seat.The alarm device includes a housing with an axially movable telescopic rod on one side.The telescopic rod has one end inside the housing and the other end extending out of the housing.The monitoring device is installed on the bolt and nut used to fix the worm shell access door in pairs.The telescopic rods of the two pairs of alarm devices are arranged oppositely, and the ends of the telescopic rods outside the housing abut each other.When the telescopic rod moves axially, the alarm device can send an alarm.The existing shortcomings are:

[0004] It does not have waterproof function and is not suitable for installation and operation in humid places.In order to facilitate the opening and closing of the alarm device, a special device opening and closing switch is provided, which has a gap sealing problem at the switch position, which is not conducive to waterproof.The original installation base cannot realize stepless adjustment during installation of the alarm device.The original alarm contact has the problems of poor contact and no alarm.The original spring installation position causes the spring to jam, and the device does not alarm after a period of operation. SUMMARY

[0005] The utility model solves the technical problem by providing a waterproof structure based on bolt operating condition monitoring device, which changes the spring installation position inside the alarm and the structure of the alarm contact, so that the alarm device can reliably and stably send alarm signals.

[0006] The utility model provides a waterproof structure based on bolt operation state monitoring device, it includes alarm device body, the shell one end of alarm device body sets up through -hole, and the contact in the shell is slid with its sliding fit through the through -hole, the sealing gasket is fixed on the telescopic link outside the shell, the contact is fixed on the telescopic link in the shell, the spring is set up on the telescopic link of contact side, the contact and shell inner wall are fixed, the sealing gasket and shell outer wall contact seal when the spring is compressed.

[0007] The shell is hollow structure, and the upper side is provided with a sealing cover, and a sealing strip is arranged around the sealing cover to seal with the edge of the shell.

[0008] The shell is hollow structure, and the upper side is provided with a sealing cover, and a sealing strip is arranged around the sealing cover to seal with the edge of the shell.

[0009] The contact is of U-shaped structure, and the opening side faces the contact.

[0010] The contact and the contact are arranged on the telescopic link.

[0011] The main beneficial effects of the utility model lie in:

[0012] Every two alarm device bodies are a pair of nuts fixed on the both ends of the same bolt, and the end heads of the two telescopic links outside the shell abut against each other, so that the spring is in a compressed state, the contact does not contact the contact, the sealing gasket contacts the outer wall of the shell to seal and prevent water, and the waterproof and moisture-proof characteristics are achieved.

[0013] The telescopic link is guided through the guide hole on the convex block during the telescopic process, and the stability is good during the telescoping.

[0014] The contact is of U-shaped opening structure, the distance between the two inner walls of the contact opening is consistent with the diameter of the contact, when the contact moves towards the contact, the side surface of the contact can also contact the contact, the stroke of the contact and the contact is increased, and even in the case of spring elastic force loss, the alarm can also be conducted.

[0015] The two ends of the spring abut against the convex block and the contact, and during the installation of the two alarm device bodies and the bolt, the distance between the two can be adjusted by pushing the telescopic link, and the adjustment is convenient. BRIEF DESCRIPTION OF DRAWINGS

[0016] The utility model will be further described in connection with the drawings and examples.

[0017] Fig. 1 The utility model is used state diagram.

[0018] Fig. 2 This is a schematic diagram of the structure of the alarm device body of this utility model.

[0019] Fig. 3 This is a schematic diagram of the internal structure of the housing of this utility model.

[0020] Fig. 4 This is a front view schematic diagram of the card sleeve of this utility model.

[0021] Fig. 5 for Fig. 4 A side view diagram.

[0022] In the diagram: alarm device body 10; housing 1; sealing cover 11; telescopic rod 2; contact 3; sealing gasket 4; contact head 5; spring 6; protrusion 7; ferrule 8. Detailed Implementation

[0023] like Figs. 1-4 In this paper, a waterproof structure based on a bolt operation status monitoring device is disclosed. It includes an alarm device body 10. One end of the housing 1 of the alarm device body 10 is provided with a through hole. A telescopic rod 2 passes through the through hole and slides with a contact 3 inside the housing 1. A sealing gasket 4 is fixed on the telescopic rod 2 located outside the housing 1. A contact 5 is fixed on the telescopic rod 2 located inside the housing 1. A spring 6 is sleeved on the telescopic rod 2 located on one side of the contact 5. The contact 3 is fixed to the inner wall of the housing 1. When the spring 6 is compressed, the sealing gasket 4 contacts and seals with the outer wall of the housing 1. Each pair of alarm device bodies 10 is fixed to the nuts at both ends of the same bolt. The ends of the two telescopic rods 2 located outside the housing 1 abut against each other. At this time, the spring 6 is in a compressed state, the contact 5 does not contact the contact point 3, and the sealing gasket 4 contacts the outer wall of the housing 1 to seal and waterproof. When the bolt breaks or loosens, the spring 6 extends and pushes the contact 5 towards the contact point 3, so that the contact 5 and the contact point 3 make contact and conduct the alarm of the alarm device body 10. Before the alarm, the inside of the housing 1 is always in a sealed state, which is beneficial for use in water or humid environments. It has the characteristics of being waterproof, moisture-proof, easy to adjust, and reliable.

[0024] In a preferred embodiment, the housing 1 has a hollow structure, with a sealing cover 11 on its upper side. A sealing strip is provided around the sealing cover 11 to seal the edge of the housing 1. Before use, the sealing cover 11 is removed, and the contacts 3 and 5 are electrically connected to the alarm unit 10. After connection, the sealing cover 11 is fixed in place. Installation and disassembly are convenient, and the sealing performance is good.

[0025] In a preferred embodiment, a protrusion 7 is provided at the end of the housing 1 furthest from the contact point 3, and a guide hole is provided on the side of the protrusion 7 to slide and engage with one end of the telescopic rod 2; the two ends of the spring 6 abut against the protrusion 7 and the contact 5. In use, the telescopic rod 2 is guided by the guide hole on the protrusion 7 during extension and retraction, resulting in good stability during extension and retraction.

[0026] Preferably, since the two ends of the spring 6 are in mutual interference with the protrusion 7 and the contact 5, the spring 6 body is not easily interfered, and the jamming phenomenon is avoided during the operation.

[0027] Preferably, since the two ends of the spring 6 are in mutual interference with the protrusion 7 and the contact 5, the distance adjustment between the two alarm device bodies 10 can be realized by pushing the telescopic rod 2 during the bolt installation process, and the adjustment is convenient.

[0028] In the preferred scheme, the contact 3 is in U-shaped structure, and the opening side faces the contact 5. In use, when the bolt is broken or loose, the spring 6 is stretched to push the telescopic rod 2 to move outwardly from the shell 1, at this time, the contact 5 moves to the contact 3 to contact and conduct the alarm.

[0029] Preferably, the contact 3 is in U-shaped opening structure, the distance between the two inner walls of the contact 3 opening is consistent with the diameter of the contact 5, when the contact 5 moves to the contact 3, the side surface of the contact 5 can also contact the contact 3, the stroke when the contact 5 contacts the contact 3 is increased, and even in the case of the spring 6 elastic force loss, the alarm can also be conducted.

[0030] In the preferred scheme, the sleeve 8 is arranged between the contact 3 and the contact 5 and is sleeved on the telescopic rod 2; the sleeve 8 is a tapered pipe in opening structure. Before use, since the alarm device body 10 is installed in pairs, the spring 6 of the single alarm device body 10 is in the stretched state, so that the contact 5 and the contact 3 are in the contact state, at this time, the sleeve 8 is arranged between the contact 3 and the contact 5 to avoid the contact 5 and the contact 3 from contacting and triggering the alarm.

[0031] Preferably, the shell 1, the telescopic rod 2 and the sleeve 8 are all insulating materials.

[0032] The above embodiment is only the preferred technical scheme of the utility model, and should not be regarded as the limitation of the utility model. The embodiments in the application and the features in the embodiments can be combined with each other in the case of no conflict. The protection scope of the utility model should be the technical scheme recorded in the claims, including the equivalent replacement scheme of the technical features in the technical scheme recorded in the claims. That is, the equivalent replacement improvement in this range is also within the protection scope of the utility model.

Claims

1. A waterproof structure based on a bolt operating state monitoring device, characterized by: It includes alarm device body (10), the shell (1) of alarm device body (10) one end is provided with through -hole, telescopic rod (2) passes through the through -hole and the contact (3) in shell (1) and its sliding fit;Telescopic rod (2) on the shell (1) outside is fixed with sealing gasket (4), telescopic rod (2) in shell (1) is fixed with contact (5), telescopic rod (2) on the one side of contact (5) is set with spring (6);Contact (3) and shell (1) inner wall are fixed;Spring (6) is compressed when sealing gasket (4) and shell (1) outer wall contact seal.

2. The waterproof structure based on the bolt operating state monitoring device according to claim 1, characterized in that: The shell (1) is hollow structure, the upper side is provided with sealing cover (11), the periphery of sealing cover (11) is provided with sealing strip and is sealed with shell (1) edge.

3. The waterproof structure based on bolt operating state monitoring device according to claim 1, characterized in that: The shell (1) is provided with lug (7) away from the one end of contact (3), the side of lug (7) is provided with guide hole and one end of telescopic rod (2) sliding fit;Spring (6) both ends and lug (7) and contact (5) are mutually contacted.

4. The waterproof structure based on bolt operation state monitoring device according to claim 1, characterized in that: The contact (3) is U-shaped structure, and the opening side faces the contact (5).

5. The waterproof structure based on bolt operating condition monitoring device according to claim 1, characterized in that: The contact (3) and contact (5) between setting sleeve (8) is set on telescopic rod (2);Sleeve (8) is the taper pipe of open structure.

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