Spring T-shaped bolt for pre-buried channel

Abstract

The utility model discloses a spring T-shaped bolt for an embedded channel. The bolt comprises a bolt head and a bolt rod which are matched with a channel, a spring is arranged at the upper end of the bolt head, a tooth structure capable of being meshed with the channel is arranged on the lower surface of the bolt head, an indication groove is formed in the lower end of the bolt rod, the spring is a spiral compression spring, and the section of the bolt head is in a parallelogram shape. The T-shaped bolt has the advantages that the spring is arranged above the head of the T-shaped bolt, and after the T-shaped bolt is screwed into the channel, the spring is compressed and provides continuous elastic force, so that the bolt can be effectively prevented from falling off due to the action of gravity, and stable initial positioning is realized; a tooth structure is arranged on the lower surface of the head of the bolt and can be better meshed with teeth in the channel, the connection stability and reliability are improved, and safe fixing of equipment or a support is guaranteed; according to the structure, the bolts do not need to be continuously lifted in the installation process, the installation operation can be completed by one person, the construction process is simplified, and the installation efficiency of equipment, supports and the like is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a shield tunnel building construction technology, especially a spring T type bolt for pre -buried channel. BACKGROUND

[0002] As a commonly used building embedded part, the pre -buried channel has been widely used in subway tunnel, city pipe gallery, high -speed rail tunnel, nuclear power station and other concrete prefabricated components, and is mainly used for subsequent installation of mechanical and electrical equipment, water pipe support, evacuation platform etc., in the actual installation process, usually uses T type bolt to connect, and the T type bolt needs to put the longer side of the bolt head into the cavity of the pre -buried channel along the channel mouth during installation, then the shorter side of the head is made to adhere to the inner wall of the channel by rotating, and the bolt head is made to mesh with the tooth structure of the pre -buried channel by pulling outwards, finally the fixing is completed through the bolt rod passing through the equipment back plate or support bottom plate. However, in this process, the operator needs to pull the T type bolt outwards all the time to prevent the bolt head from falling off due to gravity, which not only increases the complexity of the installation operation, but also needs to be completed by multiple people, resulting in low construction efficiency. SUMMARY

[0003] The utility model solves the technical problem to provide a spring T type bolt for pre -buried channel not easy to fall off, convenient to install.

[0004] In order to solve the above technical problem, the spring T type bolt for pre -buried channel of the utility model includes the bolt head and bolt rod of the adaptation channel, the upper end of the bolt head is equipped with the spring, and the lower surface of the bolt head has the tooth structure that can mesh with the channel.

[0005] The lower end surface of the bolt rod has the indication groove.

[0006] The spring is a spiral compression spring.

[0007] The cross section shape of the bolt head is parallelogram.

[0008] The utility model has the advantages of:

[0009] (1) by setting the spring on the T type bolt head, after the T type bolt is rotated into the channel, the spring is compressed and provides continuous elastic force, which can effectively avoid the bolt from falling off due to gravity, and realize stable initial positioning.

[0010] (2) the lower surface of the bolt head is provided with the tooth structure, which can better mesh with the teeth inside the channel, improve the stability and reliability of the connection, and ensure the safe fixation of the equipment or support.

[0011] (3) The spring T-bolt structure does not require continuous pulling of the bolts during installation. A single person can complete the installation operation, which simplifies the construction process and effectively improves the installation efficiency of equipment, brackets, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a structural diagram of a spring T-bolt used for pre-buried channels in the utility model;

[0013] Figure 2 This is a side view of a spring T-bolt for embedded channels according to the present invention;

[0014] Figure 3 This is a bottom perspective view of the spring T-bolt used for the embedded channel of the utility model;

[0015] Figure 4 This is an assembly diagram of the spring T-bolt used for the embedded channel of the utility model. DETAILED DESCRIPTION

[0016] The spring T-bolt for pre-embedded channels of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Example

[0017] like Figure 1 、 2 As shown, the spring T-bolt for pre-buried groove includes a bolt head 1 and a bolt rod 2 adapted to the groove; Figure 4 As shown, the cross-sectional shape of the bolt head 1 is a parallelogram. During installation, the longer side of the bolt head 1 needs to be placed into the cavity of the embedded groove along the groove mouth, and then the shorter side of the head needs to be fitted with the inner wall of the groove by rotation, and the bolt head needs to be pulled outward to engage with the tooth structure of the embedded groove; the upper end of the bolt head 1 is provided with a spring 3, and the spring 3 is a spiral compression spring. The spring 3 is compressed when the bolt head 1 is screwed into the groove. After the T-bolt is screwed into the groove, the spring is compressed and provides continuous elastic force, which can effectively prevent the bolt from falling off due to gravity and achieve stable initial positioning; the lower end of the bolt head 1 is connected to one end of the bolt rod 2, and the lower surface of the bolt head 1 has a tooth structure 4 that can engage with the groove; as shown Figure 3 As shown, the lower end of the bolt rod 2 is provided with an indicator groove 5 perpendicular to the length direction of the channel. When the indicator groove 5 is perpendicular to the length direction of the channel, it indicates that the T-bolt is installed in place.

Claims

1. A spring T-bolt for embedded channels, characterized by: It comprises a bolt head (1) adapted to a groove and a bolt rod (2), wherein the upper end of the bolt head (1) is provided with a spring (3), and the lower surface of the bolt head (1) has a tooth structure (4) capable of engaging with the groove.

2. The spring T-bolt for pre-buried channel according to claim 1, characterized in that: The lower end surface of the bolt rod (2) is provided with an indicator groove (5).

3. The spring T-bolt for pre-buried channel according to claim 2, characterized in that: The spring (3) is a helical compression spring.

4. The spring T-bolt for pre-buried channel according to claim 3, characterized in that: The cross-sectional shape of the bolt head (1) is a parallelogram.

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