A self-regulating temperature-compensated clamp

Abstract

The invention relates to the field of connection devices, in particular to a self-adjusting temperature compensation clamp used for sealing rubber hoses. The self-adjusting temperature compensation clamp designed by the present invention includes a clamp body and an expansion tube for holding the pipe body tightly. The clamp body has a first connection end and a second connection end, and the first connection end and the second connection end intersect. Arranged and there is a distance between the first connection end and the second connection end; the expansion tube includes an outer cylinder and a lining core, one end of the outer cylinder is closed and the other end is open, and the outer cylinder has a first cavity and a second cavity, the second The first cavity communicates with the second cavity, the extending end of the lining core extends into the first cavity through the opening end of the outer cylinder, the lining core is slidingly connected with the inner wall of the outer cylinder, and the extending end of the lining core is connected with the clamp The first connecting end of the body is connected, the outer cylinder is connected to the second connecting end, and the second cavity is completely filled with expansion medium. The function of automatically adjusting the clamping force of the clamp at low temperature is realized by using the volume change of the expansion medium in different forms.

Description

technical field [0001] The invention relates to the field of connection devices, in particular to a self-adjusting temperature compensation clamp used for sealing rubber hoses. Background technique [0002] The application field of rubber hose covers various industrial manufacturing and circulation fields, and is usually responsible for the transmission of water, gas, oil and other media. The rubber hose relies on the clamping force to fit the tube body to the joint, which is the most common connection method. This method has a simple structure and low cost. [0003] However, due to the material properties of the rubber hose, the sealing force fluctuates with temperature and decreases with stress relaxation. Therefore, once the clamp is tightened, its state is fixed. When the outside temperature drops to the stress relaxation of the rubber hose (stress relaxation: The strength used to maintain the applied strain will decrease or even disappear with time) After the temperatu...

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Problems solved by technology

[0003] However, due to the material properties of the rubber hose, the sealing force fluctuates with temperature and decreases with stress relaxation. Therefore, once the clamp is tightened, its state is fixed. When the outside temperature drops to the stress relaxation of the rubber hose (stress relaxation: The force used to maintain the applied strain will decrease or even disappear with time) After the temperature is lowered, the sealing force value will gradually decay with the temperature decrease, especially below 0°C, the material elasticity will decay, the hardness will increase, and leakage will easily occur

[0004] Most of the existing elastic clamps use spring elasticity for compensation. For example, the Chinese utility model patent application with the authorized announcement number CN208845904U discloses a vacuum clamp with adjustable temperature compensation, including clamp I, clamp II, spring, lock Tightening mechanism and pre-tightening force adjustment mechanism, the pre-tightening force is adjusted through the adjusting part and the pre-tightening force is known through the pre-tightening force display mechanism, which overcomes the problem of pipe leakage caused by the deformation of the clamp caused by thermal expansion and contraction, but The pre-tightening force adjustment mechanism in this application needs to be manually adjusted and cannot be self-adjusted; another example is the Chinese invention patent application with the notification number CN108443611A, which discloses an elastic clamp assembly. The elastic clamp assembly includes a clamp body, For locking bolts, springs, hollow limit discs, limit posts and guide frames, this application uses spring elasticity for compensation, which can only compensate for the clamping force within a certain range, and long-term compensation for the clamping force will increase the stress of the rubber material Slack, shortening the product life of the rubber hose

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