Safety valve and hot water system

Abstract

The utility model relates to a safety valve and a hot water system, the safety valve comprises a valve body, a valve rod, a valve seat, a first spring and a temperature sensing rod device, the temperature sensing rod device is arranged in a second valve cavity of the valve body, and the temperature sensing rod device comprises a sleeve, a supporting column, a piston column and a second spring; the sleeve is installed in the second valve cavity in the axial direction, and a second spring arranged on the supporting column in a sleeving mode is arranged in the sleeve. The sleeve, the supporting column, the piston column and the stopping piece are all made of stainless steel materials. The piston column is located at the lower end of the supporting column, the piston column and the supporting column are of an integrated structure, the lower end of the sleeve is closed, and a thermal inductance expansion material is arranged in a closed cavity. The material of the safety valve is better in corrosion resistance, no material needs to be sprayed, the influence of the material on the water quality can be effectively prevented, the sleeve and internal parts are not prone to deformation, the corresponding size can be better guaranteed, meanwhile, the supporting column and the piston column are of an integrated structure, the number of parts can be reduced, product assembly is more convenient, and the production cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of safety valve technology, specifically to a safety valve equipped with a temperature sensing rod device. This utility model also relates to a hot water system equipped with the aforementioned safety valve. Background Technology

[0002] Temperature and pressure safety valves are suitable for pressurized solar water heaters, electric water heaters, gas water heaters, hot water boilers, and other hot water systems. Their main function is to effectively prevent the water tank from bursting due to temperature and pressure rise caused by the failure of the temperature control system of the pressurized hot water device or by scale blockage.

[0003] The temperature and pressure safety valve's sensing rod is built into the hot water system and is in a humid environment. The temperature and pressure safety valve includes a sensing rod. When the water temperature reaches the specified temperature, the paraffin expands and pushes the support column to open the valve seat to release the temperature. The sensing rod is wrapped with a sleeve and has a gasket inside. The outside of the sleeve often needs to be coated with nylon powder, and the sleeve and gasket are also prone to damage and deformation. Utility Model Content

[0004] Through long-term research, the inventors discovered that the main reason for the above is that the sleeve and gasket of the temperature sensing rod are mostly made of copper. In order to meet the relevant certification requirements, additional coating is required on the outside, which increases the number of processes and the material cost. In addition, copper has low hardness and is easily damaged and deformed.

[0005] The purpose of this invention is to provide a safety valve to solve the above-mentioned technical problems.

[0006] Another objective of this invention is to provide a hot water system equipped with the aforementioned safety valve.

[0007] To achieve the above objectives, this utility model provides a safety valve, comprising:

[0008] The valve body has a first valve chamber and a second valve chamber, and the valve body has a valve port inside that connects the first valve chamber and the second valve chamber;

[0009] The valve seat is provided with a sealing gasket, which can abut against or move away from the valve port;

[0010] A temperature-sensing rod device, at least partially disposed in the second valve cavity, includes a stainless steel sleeve, a support column, a piston column, and a stop. The sleeve is fixed to the valve body. The support column is located inside the sleeve and its upper end extends out of the sleeve to abut against the bottom of the valve seat. A second spring is provided inside the sleeve and sleeved on the support column. The upper end of the second spring directly or indirectly abuts against the stop, and the lower end directly or indirectly abuts against the stepped portion of the support column. The lower end of the sleeve is closed and contains a thermally expanding material.

[0011] The safety valve provided by this utility model has a sleeve, support column, piston column and stop component of the temperature sensing rod device made of stainless steel. Under the same external size conditions, steel is more suitable for humid environments than brass and copper, has better corrosion resistance, and can effectively prevent the material from affecting water quality, thereby protecting health. Moreover, the use of stainless steel has high material hardness, and the sleeve and internal parts are not easily deformed.

[0012] To achieve the other objective mentioned above, this utility model provides a hot water system equipped with a temperature and pressure safety valve, wherein the temperature and pressure safety valve is any of the safety valves described above.

[0013] The hot water system provided by this utility model is equipped with the aforementioned safety valve. Since the safety valve has the aforementioned technical effects, the hot water system equipped with the safety valve should also have the corresponding technical effects. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the safety valve provided in the first embodiment of the present invention;

[0015] Figure 2 for Figure 1 A partial enlarged view of the components at the upper end of the first spring shown in the figure;

[0016] Figure 3 for Figure 1 The diagram shows a partial enlarged view of the components at the lower end of the first spring.

[0017] In the picture:

[0018] 10-Valve body; 11-First valve chamber; 12-Second valve chamber; 13-Valve port; 14-First connection port; 15-Second connection port; 20-Valve stem; 30-Valve seat; 31-Sealing gasket; 32-Connecting sleeve; 33-First annular step; 34-Second annular step; 40-First spring; 50-Temperature sensing rod device; 51-Sleeve; 52-Support column; 53-Piston column; 54-Second spring; 55-Stop; 56-Sealing sleeve; 57-Thermosensitive expansion material; 60-Operating handle; 70-Positioning guide; 81-First cover; 811-Outward flange; 82-Pad plate; 83-Intermediate sleeve; 831-Flared edge; 91-Second cover. Detailed Implementation

[0019] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] In this document, terms such as "upper," "lower," "inner," and "outer" are established based on the positional relationships shown in the accompanying drawings. Depending on the drawings, the corresponding positional relationships may also change. Therefore, they should not be interpreted as an absolute limitation on the scope of protection. Moreover, relational terms such as "first" and "second" are only used to distinguish one component from another that has the same name, and do not necessarily require or imply any such actual relationship or order between these components.

[0021] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of the safety valve provided in the first embodiment of the present invention.

[0022] As shown in the figure, in one specific embodiment, the safety valve provided by this utility model mainly consists of a valve body 10, a valve stem 20, a valve seat 30, a first spring 40, and a temperature sensing rod device 50.

[0023] The valve body 10 has a first valve chamber 11 located at the top and a second valve chamber 12 located at the bottom. The valve body 10 has a valve port 13 located between the first valve chamber 11 and the second valve chamber 12. The first valve chamber 11 and the second valve chamber 12 can be connected through the valve port 13. The side wall of the first valve chamber 11 has a first connection port 14, and the lower end of the second valve chamber 12 forms a second connection port 15.

[0024] One end of the valve stem 20 passes through the interior of the first valve chamber 11 in the axial direction, and the other end of the valve stem 20 is located outside the first valve chamber 11 and is provided with an operating handle 60.

[0025] The valve seat 30 is installed at one end of the valve stem 20 located inside the first valve chamber 11. The valve seat 30 is provided with a sealing gasket 31 for sealing the valve port 13. The first spring 40 is fitted onto the valve stem 20 to press the valve seat 30 toward the valve port to press the sealing gasket 31.

[0026] The temperature sensing rod device 50 is located in the second valve chamber 12, and it is mainly composed of components such as a sleeve 51, a support column 52, a piston column 53, and a second spring 54. The sleeve 51 is installed in the second valve chamber 12 along the axial direction through a positioning guide 70. This positioning guide 70 is disc-shaped and has a through hole for the sleeve 51 to pass through and flow holes distributed around the through hole. It is fixedly connected to the inner wall of the second valve chamber 12 through its outer peripheral wall.

[0027] The support column 52 is located inside the sleeve 51, with its upper end extending out of the sleeve 51 and corresponding to the bottom of the valve seat 30. A second spring 54 is sleeved inside the sleeve 51 and fitted onto the support column 52. The upper end of the second spring 54 abuts against the stop member 55, and its lower end abuts against the stepped portion of the support column 52. In this embodiment, the stop member 55 is in the form of a gasket, fixed inside the sleeve 51 and located near the upper end of the sleeve 51. Of course, besides a gasket, the stop member 55 can also be designed in other forms.

[0028] The sleeve 51, support column 52, piston column 53 and stop 55 are all made of stainless steel, preferably food-grade stainless steel such as SUS304 and SUS316. Moreover, the piston column 53 is located at the lower end of the support column 52 and is an integral structure with the support column 52, that is, the two are combined into one part. The lower end of the sleeve 51 is closed and a thermal expansion material 57 is provided in the closed cavity, such as paraffin wax.

[0029] The sleeve 51, support column 52, piston column 53, and stop 55 of the temperature sensing rod device 50 are all made of stainless steel. Under the same external dimensions, steel is more suitable for humid environments than brass or copper, has better corrosion resistance, and can effectively prevent the material from affecting water quality, thereby protecting health. Moreover, the use of stainless steel has high material hardness, making the sleeve 51 and internal parts less prone to deformation, ensuring the corresponding dimensions, and eliminating the need for any coating, which can significantly reduce processes and save material costs. At the same time, by designing the support column 52 and piston column 53 as an integrated structure, the two are combined into a single part, which can reduce the number of parts, facilitate product assembly, and reduce production costs.

[0030] In this embodiment, a sealing sleeve 56 is also connected to the lower end of the piston column 53. The lower end of the piston column 53 has a screw portion with a reduced diameter. The sealing sleeve 56 is provided with internal threads and is threadedly connected to the screw portion. A washer is provided between its upper end and the lower end of the piston column 53 to prevent paraffin leakage.

[0031] Please refer to Figure 2 , Figure 2 for Figure 1 The image shows a partial enlarged view of the components at the upper end of the first spring.

[0032] As shown in the figure, a first spring support is fitted on the valve stem 20, located on the upper part of the first valve chamber 11. The first spring support has a first cover 81 with an opening facing downward, a pad 82, and an intermediate sleeve 83. The pad 82 is located at the inner top of the first cover 81, and the intermediate sleeve 83 is located below the pad 82. A through hole for the valve stem 20 to pass through is provided at the center of the first cover 81, the pad 82, and the intermediate sleeve 83.

[0033] The first cover 81 is inverted "U" shape, with an upwardly bent outward flange 811 at its lower edge, which cooperates with the inner wall of the first valve cavity 11 through the outward flange; the upper end of the middle sleeve 83 has a flared edge 831 with a gradually increasing diameter and bent downward, the convex arc surface of the flared edge 831 abuts against the pad 82, and the upper end of the first spring 40 abuts against the concave arc surface of the flared edge 831.

[0034] The first spring support can effectively support and position the upper end of the first spring 40, and ensure the alignment of the valve stem 20 and the first spring 40, so that the valve stem 20 and the first spring 40 can move up and down stably, thereby improving the sealing performance under normal conditions and the safety performance under pressure relief conditions.

[0035] Please refer to Figure 3 , Figure 3 for Figure 1 The diagram shows a partial enlarged view of the components at the lower end of the first spring.

[0036] As shown in the figure, the lower end of the valve stem 20 is provided with a reduced diameter section, and the upper end of the valve seat 30 has a connecting sleeve 32. After the lower end of the valve stem 20 is inserted into the connecting sleeve 32, the upper end of the connecting sleeve 32 is closed to achieve the connection between the valve stem 20 and the valve seat 30.

[0037] The outer periphery of the valve seat 30 is provided with a second spring support member. The second spring support member has a second cover 91 with an opening facing downward. The sealing gasket 31 is located at the inner top of the second cover 91. In the sealed state, the second cover 91 can contain the valve port 13 inside it.

[0038] Specifically, the outer periphery of the valve seat 30 is provided with a first annular step 33 and a second annular step 34. The diameter of the first annular step 33 is smaller than that of the second annular step 34. The sealing gasket 31 is fitted onto the second annular step 34. The second cover 91 is fitted onto the first annular step 33 and fixed by a retaining ring or other limiting components. The upper surface of the sealing gasket 31 is attached to the inner top of the second cover 91. The inner edge of the lower surface of the sealing gasket 31 abuts against the step surface of the second annular step 34. The step surface of the second annular step 34 is provided with an annular groove.

[0039] The second spring support can cooperate with the first spring support to effectively support and position the upper and lower ends of the first spring 40, and ensure the alignment performance of the valve stem 20 and the first spring 40, so that the valve stem 20 and the first spring 40 can move up and down stably, thereby improving the sealing performance under normal conditions and the safety performance under pressure relief conditions.

[0040] When the above-mentioned safety valve is in use, it is sealed by pressing the sealing gasket 31 with the elastic force of the first spring 40. The following situations occur:

[0041] When the internal pressure of the hot water system reaches the specified pressure, it overcomes the elastic force of the first spring 40, causing the valve seat 30 and valve stem 20 to move upward, thereby opening the valve port 13 and realizing pressure relief.

[0042] When the water temperature of the hot water system reaches the specified temperature, the paraffin inside the lower end of the sleeve 51 expands due to heat, pushing the support column 52 to move upward, opening the valve seat 30 and valve stem 20, thereby opening the valve port 13 to achieve temperature discharge.

[0043] When the operator needs to perform maintenance, they can pull the handle 60 to manually drain the waste.

[0044] The above embodiments are merely preferred embodiments of this utility model, and are not limited to them. Based on these, targeted adjustments can be made according to actual needs to obtain different implementation methods. For example, the first spring 40, the second spring 54, and the sealing gasket 31 can be positioned in other ways, etc. Since there are many possible implementation methods, they will not be listed here.

[0045] In addition to the aforementioned safety valve, this utility model also provides a hot water system, specifically a solar water heater, electric water heater, gas water heater, hot water boiler, etc., which is equipped with a temperature and pressure safety valve, and the temperature and pressure safety valve is the safety valve described above. For the remaining structure of the hot water system, please refer to the prior art, which will not be repeated here.

[0046] The safety valve and hot water system provided by this utility model have been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A safety valve, characterized in that, include: The valve body (10) is provided with a first valve chamber (11) and a second valve chamber (12), and the valve body (10) is provided with a valve port (13) that connects the first valve chamber (11) and the second valve chamber (12). The valve seat (30) is provided with a sealing gasket (31), which can abut against or move away from the valve port (13); The temperature sensing rod device (50) is at least partially disposed in the second valve chamber (12), including a stainless steel sleeve (51), a support column (52), a piston column (53), and a stop (55). The sleeve (51) is fixed to the valve body (10). The support column (52) is located inside the sleeve (51) and its upper end extends out of the sleeve (51) to abut against the bottom of the valve seat (30). A second spring (54) is provided inside the sleeve (51) and sleeved on the support column (52). The upper end of the second spring (54) directly or indirectly abuts against the stop (55), and the lower end directly or indirectly abuts against the step portion of the support column (52). The lower end of the sleeve (51) is closed and contains a thermal expansion material (57).

2. The safety valve according to claim 1, characterized in that, The support column (52) and the piston column are either separate or integrated. The valve body is fixedly provided with a positioning guide (70). The sleeve (51) is installed in the second valve cavity (12) along the axial direction through the positioning guide (70).

3. The safety valve according to claim 1, characterized in that, The stop (55) is a gasket, which is located inside the sleeve (51) and near the upper end of the sleeve (51).

4. The safety valve according to claim 1, characterized in that, The lower end of the piston rod (53) is connected to a sealing sleeve (56).

5. The safety valve according to claim 4, characterized in that, The lower end of the piston rod (53) has a screw portion with a reduced diameter. The sealing sleeve (56) is provided with an internal thread and is threaded to the screw portion. A washer is provided between its upper end and the lower end of the piston rod (53).

6. The safety valve according to claim 2, characterized in that, The positioning guide (70) is disc-shaped and has a through hole in the middle for the sleeve (51) to pass through and flow holes distributed around the through hole. Its outer peripheral wall is fixedly connected to the inner wall of the second valve cavity (12).

7. The safety valve according to claim 1, characterized in that, The valve seat (30) is provided with a first spring (40) and a valve stem (20). The first spring (40) is fitted onto the valve stem (20). A first spring support member is fitted onto the valve stem (20) at the upper part of the first valve cavity (11). The first spring support member includes a first cover (81) with an opening facing downward, a pad (82) located at the top of the first cover, and an intermediate sleeve (83) located below the pad. The first cover (81) is inverted "U" shape, and its lower edge has an upwardly bent outward flange (811), which cooperates with the inner wall of the first valve cavity (11) through the outward flange (811). The upper end of the intermediate sleeve (83) has a trumpet-shaped edge (831) with a gradually increasing diameter and downward bending. The convex arc surface of the trumpet-shaped edge (831) abuts against the pad (82), and the upper end of the first spring (40) abuts against the concave arc surface of the trumpet-shaped edge (831).

8. The safety valve according to claim 1, characterized in that, The valve seat (30) is provided with a second spring support on its outer periphery. The second spring support includes a second cover (91) with its opening facing downwards. The sealing gasket (31) is located at the inner top of the second cover (91).

9. The safety valve according to claim 8, characterized in that, The outer periphery of the valve seat (30) is provided with a first annular step (33) and a second annular step (34). The diameter of the first annular step (33) is smaller than that of the second annular step (34). The sealing gasket (31) is fitted onto the second annular step (34). The second cover (91) is fitted onto the first annular step (33) and fixed by a limiting member. The upper surface of the sealing gasket (31) is attached to the inner top of the second cover (91). The inner edge of the lower surface of the sealing gasket (31) abuts against the step surface of the second annular step (34). The step surface of the second annular step (34) is provided with an annular groove.

10. The safety valve according to claim 1, characterized in that, The sleeve (51), support column (52), piston column (53) and stop (55) are made of SUS304 or SUS316 stainless steel, and the thermal expansion material (57) includes paraffin wax.

11. A hot water system, equipped with a temperature and pressure safety valve, characterized in that, The temperature and pressure safety valve is the safety valve described in any one of claims 1 to 10.

Images