Pressure valve for refrigeration equipment

Abstract

The utility model relates to the technical field of refrigeration equipment, in particular to a pressure valve for refrigeration equipment, which comprises a valve body, the inner side of the valve body is respectively provided with a water inlet end and a water outlet end, the top of the valve body is fixedly provided with a valve cover through a bolt, the center of the valve cover is sleeved with a valve rod in a sliding mode, and the lower end of the valve rod is fixedly provided with a valve core. A supporting frame is fixedly installed at the top end of the valve rod in a threaded mode. Through the arrangement of the liquid container and the pressure gauge, when the pressure valve does not work, a worker can compare the position indicated by a pointer of the pressure gauge with a factory value by observing the position indicated by the pointer of the pressure gauge, and if the position indicated by the pointer is smaller than the factory value, the spring is damaged, so that whether the elastic force of the spring is attenuated after long-time use is conveniently judged; and the mounting seat and the liquid container are dismounted together by screwing a bolt corresponding to the mounting seat, so that a worker can maintain and replace the spring conveniently, and normal functions and use of the pressure valve are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigeration equipment, and particularly relates to a pressure valve for refrigeration equipment. Background Technique

[0002] With the continuous development of refrigeration technology and the expansion of application fields, the performance requirements for pressure valves in refrigeration equipment are also getting higher and higher. As an important control element in the refrigeration system, the pressure valve is mainly used to regulate and control the pressure in the system to ensure the stability and efficiency of the refrigeration cycle. The pressure valve is an important part that determines the working effect of the condenser and is a necessary device connecting the refrigeration compressor and the cooling water pipeline, controlling the refrigeration effect of the condenser.

[0003] The pressure valve used in refrigeration equipment is generally installed on the cooling water pipeline of the condenser (usually installed at the water inlet end of the condenser), and adjusts the flow rate of cooling water according to the change of the condensation pressure. It adjusts the valve opening degree by directly sensing the change of the pressure of the refrigerant cycle so that enough cooling water can flow through, which will save a large amount of cooling water. In short: cool as required. When the condensation pressure of the compressor increases (i.e., the condensation pressure rises), the valve will open wider, allowing more cooling water to enter the condenser and accelerating the refrigerant condensation speed; conversely, when the condensation pressure drops, the valve will close, reducing the amount of cooling water entering the condenser, thereby keeping the condensation pressure within a certain range. In order to ensure the normal operation of the refrigeration equipment, the role of the condenser is crucial, so the technical research on the condenser has never stopped.

[0004] After long-term use, a problem will occur with the existing pressure valve, that is, the elastic force of the internal spring will gradually weaken. This attenuation of the elastic force will interfere with the normal function of the pressure valve, and because it is not easily detected, it may cause damage to the spring without being discovered in time, thus delaying the necessary maintenance and replacement work. Content of the Utility Model

[0005] The purpose of the utility model is to provide a pressure valve for refrigeration equipment, which has the characteristic of being convenient to judge whether the elastic force of the spring decays.

[0006] To achieve the above object, the present utility model provides the following technical solution: A pressure valve for a refrigeration device, comprising a valve body, an inlet end and an outlet end are respectively arranged inside the valve body, a valve cover is fixedly installed on the top of the valve body by bolts, a valve rod is slidably sleeved in the center of the valve cover, a valve core is fixedly installed at the low end of the valve rod, a support frame is fixedly installed at the top of the valve rod by threads, a movable disc is fixedly installed at the top of the support frame, a liquid container is fixedly installed above the valve cover, a pressure gauge is arranged on one side of the liquid container, a piston is slidably sleeved inside the liquid container, a connecting rod is threadedly installed at the bottom of the piston, the connecting rod is slidably sleeved with the movable disc, a fixed disc is fixedly sleeved on the outer side of the connecting rod, and a spring is arranged between the fixed disc and the movable disc.

[0007] For the convenience of observation, as a preferred embodiment of the pressure valve for a refrigeration device of the present utility model, a connecting pipe is fixedly installed at the top of the liquid container, and one end of the connecting pipe away from the liquid container is fixedly installed with the pressure gauge.

[0008] For the convenience of disassembly, as a preferred embodiment of the pressure valve for a refrigeration device of the present utility model, two support columns are symmetrically installed on the top of the valve cover with the valve rod as the center, the top ends of the two support columns are fixedly installed with a mounting seat by bolts, and the top of the mounting seat is fixedly installed with the liquid container by bolts.

[0009] For the convenience of limiting, as a preferred embodiment of the pressure valve for a refrigeration device of the present utility model, connecting plates are fixedly installed on both the left and right sides of the fixed disc, and the connecting plates are slidably sleeved with the support columns.

[0010] For the convenience of applying pressure, as a preferred embodiment of the pressure valve for a refrigeration device of the present utility model, the spring is sleeved on the outer side of the connecting rod, the top end of the spring contacts the fixed disc, and the low end of the spring contacts the movable disc.

[0011] For the convenience of the flow of cooling water, as a preferred embodiment of the pressure valve for a refrigeration device of the present utility model, the inlet end is connected to the outlet end of the cooling water pipeline, and the outlet end is connected to the inlet end of the condenser.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] Through the settings of the liquid container and the pressure gauge, when the pressure valve is in a non-operating state, the staff can compare the position indicated by the pointer of the pressure gauge with the factory value. If it is less than the factory value, the spring is damaged, which is convenient for judging whether the spring force decays after long-term use. When it is found that the spring is damaged, the mounting seat and the liquid container can be disassembled together by turning the corresponding bolts of the mounting seat, which is convenient for the staff to repair and replace the spring, thus ensuring the normal function of the pressure valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a three-dimensional structure diagram of the present utility model;

[0015] Figure 2 is a sectional structure diagram of the present utility model;

[0016] Figure 3 is a partial structure diagram of the present utility model;

[0017] Figure 4 is a partial sectional structure diagram of the present utility model.

[0018] In the figure: 1, valve body; 2, valve cover; 3, support column; 4, liquid container; 5, pressure gauge; 6, valve rod; 7, valve core; 8, support frame; 9, movable disc; 10, connecting rod; 11, fixed disc; 12, connecting plate; 13, spring; 14, mounting seat; 15, piston; 16, connecting pipe; 17, water inlet end; 18, water outlet end. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Please refer to Figures 1 to 4 , a pressure valve for a refrigeration device, including a valve body 1. The inner side of the valve body 1 is respectively provided with a water inlet end 17 and a water outlet end 18. The top of the valve body 1 is fixedly installed with a valve cover 2 through bolts. The center of the valve cover 2 is slidably sleeved with a valve rod 6. The lower end of the valve rod 6 is fixedly installed with a valve core 7. The top end of the valve rod 6 is fixedly installed with a support frame 8 through threads. The top of the support frame 8 is fixedly installed with a movable disc 9. A liquid container 4 is fixedly installed above the valve cover 2. A pressure gauge 5 is arranged on one side of the liquid container 4. A piston 15 is slidably sleeved inside the liquid container 4. The bottom of the piston 15 is threadedly installed with a connecting rod 10. The connecting rod 10 is slidably sleeved with the movable disc 9. A fixed disc 11 is fixedly sleeved on the outer side of the connecting rod 10. A spring 13 is arranged between the fixed disc 11 and the movable disc 9.

[0020] In this embodiment: when the condensation pressure of the refrigeration device increases, the cooling water will squeeze the valve core 7 and drive the valve rod 6 and the support frame 8 to move upward, so that the support frame 8 drives the movable disc 9 to press the spring 13 along the connecting rod 10, causing the spring 13 to be deformed under pressure, and the cooling water will flow out through the water outlet end 18, improving the refrigeration effect.

[0021] As a technical optimization solution of the utility model, a connecting pipe 16 is fixedly installed at the top of the liquid container 4, and one end of the connecting pipe 16 away from the liquid container 4 is fixedly installed with a pressure gauge 5.

[0022] In this embodiment: The liquid container 4 and the pressure gauge 5 can be connected and installed through the connecting pipe 16. The pressure gauge 5 can display the pressure of the liquid extruded by the piston 15 in the liquid container 4. When the pressure valve is in a non-working state, by comparing the pointer indication value of the pressure gauge 5 with the factory value, the elasticity of the spring 13 can be judged whether the elasticity decays, which is convenient to find the usage situation of the spring 13 and carry out timely replacement and maintenance.

[0023] As a technical optimization solution of the utility model, two support columns 3 are symmetrically installed on the top of the valve cover 2 with the valve rod 6 as the center. The tops of the two support columns 3 are fixedly installed with a mounting seat 14 through bolts, and the top of the mounting seat 14 is fixedly installed with the liquid container 4 through bolts.

[0024] In this embodiment: The tops of the two support columns 3 are fixedly installed with a mounting seat 14 through bolts, which is convenient to install or disassemble the mounting seat 14 by screwing the bolts. By screwing the bolts corresponding to the liquid container 4, the liquid container 4 can be installed or disassembled.

[0025] As a technical optimization solution of the utility model, connecting plates 12 are fixedly installed on both the left and right sides of the fixed disc 11, and the connecting plates 12 are slidably sleeved on the support columns 3.

[0026] In this embodiment: Through the arrangement of the connecting plates 12, the fixed disc 11 can be supported and limited, so that when the fixed disc 11 and the connecting rod 10 move up and down, the connecting plates 12 move vertically along the support columns 3, so that the fixed disc 11 and the connecting rod 10 can move in the vertical direction.

[0027] As a technical optimization solution of the utility model, the spring 13 is sleeved outside the connecting rod 10. The top of the spring 13 is in contact with the fixed disc 11, and the bottom end of the spring 13 is in contact with the movable disc 9.

[0028] In this embodiment: When the valve core 7 is pushed up by the cooling water pressure to drive the valve rod 6 and the support frame 8 to move upward, the support frame 8 drives the movable disc 9 to move upward along the connecting rod 10 to squeeze the spring 13. Through the elastic action of the spring 13, the valve core 7 can be gradually reset when the cooling water pressure becomes smaller.

[0029] As a technical optimization solution of the utility model, the water inlet end 17 is connected to the water outlet end of the cooling water pipeline, and the water outlet end 18 is connected to the water inlet end of the condenser.

[0030] In this embodiment: Through the settings of the water inlet end 17 and the water outlet end 18, when the condensation pressure of the refrigeration equipment increases, the cooling water will squeeze the valve core 7, so that the cooling water enters the valve body 1 through the water inlet end 17 and is then transported to the condenser through the water outlet end 18, accelerating the condensation speed of the refrigerant.

[0031] Working principle: First, after installing this device, at this time, the spring 13 is in a compressed state. Then record the factory value of the pressure gauge 5. When the condensation pressure of the refrigeration equipment increases, the cooling water will squeeze the valve core 7, driving the valve rod 6 and the support frame 8 to move upward, so that the support frame 8 drives the movable disc 9 to apply pressure to the spring 13 along the connecting rod 10, causing the spring 13 to be deformed under pressure, and the cooling water will flow out through the water outlet end 18. When the condensation pressure of the refrigeration equipment is less than the set threshold value, under the elastic action of the spring 13, the valve core 7 is reset; After using for a period of time, when this device is in a non-working state, the staff observes the position indicated by the pointer of the pressure gauge 5 and compares it with the factory value to judge whether the elastic force of the spring 13 decays after long-term use. If it is less than the factory value, the spring 13 is damaged. By turning the corresponding bolts of the mounting seat 14, the mounting seat 14 and the liquid container 4 are disassembled together, facilitating the maintenance and replacement operations of the staff.

[0032] The standard parts used in this utility model can all be purchased from the market. The special-shaped parts can be customized according to the descriptions in the specification and the drawings. The specific connection methods of each part all adopt conventional means such as riveting and welding that are mature in the prior art. The machines, parts and equipment all adopt conventional models in the prior art. In addition, the circuit connection adopts the conventional connection method in the prior art, which will not be elaborated here. The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art. All the electrical equipment in this utility model is powered by an external power supply.

[0033] The above is only the preferred embodiment of the present utility model, and it is not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A pressure valve for refrigeration equipment, comprising a valve body (1), wherein the inner side of the valve body (1) is provided with a water inlet end (17) and a water outlet end (18), characterized in that: A valve cover (2) is fixedly mounted on the top of the valve body (1) by means of bolts, a valve stem (6) is slidably sleeved on the center of the valve cover (2), a valve core (7) is fixedly mounted on the lower end of the valve stem (6), a support frame (8) is threadedly fixedly mounted on the top of the valve stem (6), a movable disc (9) is fixedly mounted on the top of the support frame (8), a liquid container (4) is fixedly mounted on the top of the valve cover (2), a pressure gauge (5) is arranged on one side of the liquid container (4), a piston (15) is slidably sleeved on the inner side of the liquid container (4), a connecting rod (10) is threadedly mounted on the bottom of the piston (15), the connecting rod (10) is slidably sleeved on the movable disc (9), a fixed disc (11) is fixedly sleeved on the outer side of the connecting rod (10), and a spring (13) is arranged between the fixed disc (11) and the movable disc (9).

2. A pressure valve for refrigeration equipment according to claim 1, characterized in that: A connecting pipe (16) is fixedly mounted on the top of the liquid container (4), and one end of the connecting pipe (16) away from the liquid container (4) is fixedly mounted to the pressure gauge (5).

3. The pressure valve for refrigeration equipment according to claim 1, characterized in that: Two support columns (3) are symmetrically mounted on the top of the valve cover (2) with the valve stem (6), and mounting seats (14) are fixedly mounted on the top ends of the two support columns (3) by means of bolts, and the top ends of the mounting seats (14) are fixedly mounted to the liquid container (4) by means of bolts.

4. A pressure valve for refrigeration equipment according to claim 3, characterized in that: Connecting plates (12) are fixedly mounted on both left and right sides of the fixed disc (11), and the connecting plates (12) are slidably sleeved with the supporting columns (3).

5. The pressure valve for refrigeration equipment according to claim 1, characterized in that: The spring (13) is sleeved on the outside of the connecting rod (10), the top end of the spring (13) is in contact with the fixed disc (11), and the bottom end of the spring (13) is in contact with the movable disc (9).

6. The pressure valve for refrigeration equipment according to claim 1, characterized in that: The water inlet end (17) is connected to the water outlet end of the cooling water pipeline, and the water outlet end (18) is connected to the water inlet end of the condenser.

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