A temperature and pressure safety valve

Abstract

The utility model discloses a temperature and pressure safety valve, comprising a valve body, a groove is provided on the top of the valve body, a sealing ring is installed in the groove, the valve body and the valve cap flange are connected and locked with screws, the inner cavity of the valve body is provided with a valve core, the outer diameter of the valve core is provided with a sealing ring, the bottom of the valve core is provided with a rubber gasket and a locking cap in sequence, a valve stem is provided above the valve core, a copper ring and a spring are provided on the valve stem in sequence, copper rings are provided at both ends of the spring, an adjusting rod is provided above the copper ring, the adjusting rod is connected with the valve cap, a nut is provided on the adjusting rod, a valve cover is provided on the valve cover, a hanging tag is provided on the valve cover, the valve stem passes through the copper ring, the spring, the adjusting rod, the valve cover and the hanging tag in sequence, a hole is provided on the top of the valve stem, and the valve stem is connected with a handle through a rivet, so that the structure is simple and reasonable, the assembly is convenient, the production efficiency is improved, the cost is saved and the requirements of consumers can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a temperature and pressure safety valve. Background Art

[0002] Safety valves are provided on pressure vessels to prevent safety accidents caused by excessive internal pressure or high temperature. General safety valves are single pressure limiting type and high temperature / pressure limiting combination type. A temperature and pressure safety valve with patent number CN201020125878.5 includes a valve body, a valve core assembly, a pressure relief regulating device, a heat sensing device and an exhaust valve. A drain pipe port is provided on the valve body. It is characterized in that: the pressure relief regulating device includes a valve cover, a pull rod and a reset spring. One end of the reset spring is supported on the valve core assembly matched with the valve port, and the other end of the reset spring is against the valve cover. The valve cover is threadedly fixed in the valve body and lined with a sealing ring. The bottom end of the pull rod is connected to the valve core assembly through a fixing nut, and the top end of the pull rod passes through the valve cover and is hingedly connected to the handle cam end on the top end of the valve cover. Its defects are complicated process, difficult assembly and repair, and affect production efficiency, and further improvement is needed. Summary of the invention

[0003] The purpose of the utility model is to provide a temperature and pressure safety valve, which can effectively solve the defects existing in the above-mentioned background technology.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A temperature and pressure safety valve comprises a valve body, a groove is provided on the top of the valve body, a sealing ring is installed in the groove, the valve body is connected to the valve bonnet flange and locked and fixed with four screws, a valve core is provided in the inner cavity of the valve body, a sealing ring is provided on the outer diameter of the valve core, a rubber gasket and a locking cap are installed in sequence on the bottom of the valve core, a valve stem is provided above the valve core, a copper ring and a spring are installed on the valve stem in sequence, a copper ring is installed at each end of the spring, an adjusting rod is provided above the copper ring, the adjusting rod is threadedly connected to the valve bonnet, a hexagonal nut is installed on the adjusting rod, a valve cover is provided above the valve bonnet, a hanging tag is installed on the valve cover, the valve stem passes through the copper ring, the spring, the adjusting rod, the valve cover and the hanging tag in sequence, a small hole is provided on the top of the valve stem to align with the handle hole, the small hole of the valve stem connects the valve stem to the handle through a rivet, and a temperature sensing rod and a locking nut are installed in the inner cavity of the valve body.

[0006] Compared with the prior art, the utility model has the following beneficial effects: the valve body adopts the forging process, has high pressure bearing strength, high production efficiency and no leakage risk. The temperature sensing rod adopts the bottom installation structure, the pressure part is assembled first and then the temperature sensing rod part is assembled after the test is completed. When the customer needs a pressure safety valve or a temperature pressure safety valve, it can be flexibly switched, which saves costs and can meet the requirements of consumers. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 The utility model is a schematic diagram of the structure of a temperature and pressure safety valve.

[0008] Figure 2 This is an exploded view of a temperature and pressure safety valve of the utility model.

[0009] Reference numerals in the figure: 1 valve body, 1A pressure inlet, 1B pressure relief port, 2 sealing ring, 3 locking cap, 4 rubber gasket, 5 valve core, 6 sealing ring, 7 valve stem, 8 copper ring, 9 spring, 10 valve cap, 11 screw, 12 adjusting rod, 13 hexagonal nut, 14 valve cover, 15 handle, 16 tag, 17 rivet, 18 locking nut, 19 temperature sensing rod. DETAILED DESCRIPTION

[0010] The following is a clear and complete description of the technical solutions in the embodiments of the utility model in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0011] like Figure 1~2 As shown, the utility model provides a technical solution for a temperature and pressure safety valve: comprising a valve body 1, the top of the valve body 1 is provided with a groove, a sealing ring 2 is installed in the groove, the valve body 1 is flange-connected to a valve cap 10 and is locked and fixed with four screws 11, the inner cavity of the valve body 1 is provided with a valve core 5, the outer diameter of the valve core 5 is provided with a sealing ring 6, the bottom of the valve core 5 is provided with a rubber gasket 4 and a locking cap 3 in sequence, the valve core 5 is provided with a valve stem 7 above the valve core 5, the valve stem 7 is provided with a copper ring 8 and a spring 9 in sequence, a copper ring 8 is provided at each end of the spring 9, and the An adjusting rod 12 is installed above the copper ring 8, and the adjusting rod 12 is threadedly connected to the valve bonnet 10. A hexagonal nut 13 is installed on the adjusting rod 12. A valve cover 14 is installed above the valve bonnet 10. A hanging tag 16 is installed on the valve cover 14. The valve stem 7 passes through the copper ring 8, the spring 9, the adjusting rod 12, the valve cover 4, and the hanging tag 16 in sequence. A small hole is provided on the top of the valve stem 7 and is aligned with the hole of the handle 15. The small hole of the valve stem 7 connects the valve stem 7 to the handle 15 through a rivet 17. The inner cavity of the valve body 1 is equipped with a temperature sensing rod 19 and a locking nut 18.

[0012] Working principle:

[0013] The pressure inlet 1A is connected to the pressure container. When the pressure in the pressure container reaches the set value but the temperature does not reach the limit value, the pressure directly acts on the rubber gasket 4, pushing the rubber gasket 4, the valve core 5 and the valve stem 7 upward, overcoming the elastic force of the spring 9, opening the outlet and discharging through the pressure relief port 1B until the water pressure is lower than the set value and the valve outlet is closed under the action of the return elastic force of the spring 9.

[0014] When the temperature in the pressure vessel reaches the set value but the pressure does not reach the limit value, the thermosensitive material inside the temperature sensing rod 19 expands, becomes longer and moves upward, causing the locking cap 3, the rubber gasket 4 and the valve core 5 to move upward, overcoming the elastic force of the spring 9 and opening the outlet to discharge through the pressure relief port 1B until the temperature is lower than the set value. The thermosensitive material inside the temperature sensing rod 19 contracts and closes the valve outlet under the action of the return elastic force of the spring 9.

[0015] During actual use or calibration, the pressure can be manually released as needed, that is, the handle 15 is turned over to indirectly pull the valve stem 7 to reduce the force of the spring 9, and the force acting on the rubber gasket 4 is reduced, and the internal pressure of the pressure container opens the valve core 5. When the drainage is completed, the handle 15 is turned over to the original state to restore to the automatic pressure relief mode.

[0016] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and deformations may be made to the embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A temperature and pressure safety valve, characterized in that it includes a valve body, a groove is provided on the top of the valve body, a sealing ring is installed in the groove, the valve body is connected to the valve cap flange and locked and fixed with four screws, the valve body inner cavity is provided with a valve core, the outer diameter of the valve core is provided with a sealing ring, the bottom of the valve core is provided with a rubber gasket and a locking cap in sequence, a valve stem is provided above the valve core, a copper ring and a spring are provided on the valve stem in sequence, a copper ring is provided at each end of the spring, an adjusting rod is provided above the copper ring, the adjusting rod is threadedly connected to the valve cap, a hexagonal nut is provided on the adjusting rod, a valve cover is provided above the valve cover, a hanging tag is provided on the valve stem, the valve stem passes through the copper ring, the spring, the adjusting rod, the valve cover and the hanging tag in sequence, a small hole is provided on the top of the valve stem to align with the handle hole, the small hole of the valve stem connects the valve stem to the handle through a rivet, and the valve body inner cavity is provided with a temperature sensing rod and a locking nut.

2. A temperature and pressure safety valve according to claim 1, characterized in that: A small hole is arranged in the bottom of the locking cap, and the top of the temperature sensing rod is always in the small hole of the locking cap, which can play the role of preventing from falling off and guiding.

3. A temperature and pressure safety valve according to claim 1, characterized in that: The temperature sensing rod (19) is fixed by a locking nut (18) to prevent it from falling off, and the locking nut (18) is connected to the valve body (1) through a thread.

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