Double-pole double-throw pressure switch

Abstract

The utility model discloses a double-pole double-throw pressure switch which comprises a connector, a connector base, a first pressure switch body and a second pressure switch body, the connector is arranged at the front end of the connector base, and the first pressure switch body and the second pressure switch body are arranged at the rear end of the connector base in parallel. The connector is provided with a radial connector through hole, the connector base is provided with a transverse connector base through hole, the connector through hole is communicated with the connector base through hole, and the connector base through hole is respectively communicated with the first pressure switch body and the second pressure switch body; the utility model provides the double-pole double-throw pressure switch which is reasonable in design and can perform double-threshold detection more sensitively.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure switches, and particularly to a double-pole double-throw pressure switch. Background Art

[0002] A pressure switch is a simple pressure control device. When the measured pressure reaches the rated value, the pressure switch can send out an alarm or a control signal. The working principle of the pressure switch is as follows: when the measured pressure exceeds the rated value, the free end of the elastic element generates a displacement, which directly or after comparison pushes the switch element to change the on-off state of the switch element, so as to achieve the purpose of controlling the measured pressure.

[0003] There are many types of pressure switches in the prior art. For example, in the Chinese patent with the application number CN201621092345.5, a pressure switch for a user to alarm and start a fire pump set includes: a base, on which a pipeline for conveying external pressure water is arranged; a cover shell, which is installed on the base to form a sealed space, and on which a wire joint for passing through wires is arranged, and the wires are used to supply energy to the electric components in the cover shell and realize data transmission between the electric components in the cover shell and the outside; a micro switch, which is a double-pole single-throw switch and is installed in the cover shell. A slidable top block is arranged between the micro switch and the base. The top block is slidably matched in the pipeline and can be pushed up by the pressure water in the pipeline to trigger the micro switch to open. The purpose of this utility model is to provide a pressure switch that can synchronously output electric signals for alarming and starting a fire pump set.

[0004] The threshold value of a pressure switch refers to a preset pressure value. When the measured pressure reaches this set value, the pressure switch will act and output a switch signal. This threshold value can be a fixed value or a value within a certain range. In some application scenarios, a pressure switch may have two threshold values, one is the start threshold value, and the other is the stop threshold value. The start threshold value means that when the pressure rises to this value, the switch starts; the stop threshold value means that when the pressure drops to this value, the switch stops. Such a design can avoid frequent actions of the switch during pressure fluctuations and improve the stability of the system.

[0005] However, in actual applications, it is often necessary to use two sets of threshold values to start the pressure switch under two conditions of high pressure and low pressure respectively. The prior art can only detect in groups multiple times, and the detection results have delays and are inaccurate.

[0006] In summary, the prior art still lacks a pressure switch that can accurately and sensitively perform double-threshold detection. Summary of the Utility Model

[0007] The utility model overcomes these problems and provides a double-pole double-throw pressure switch that can accurately and sensitively perform double-threshold detection.

[0008] To achieve this purpose, the utility model provides the following technical solutions:

[0009] In a first aspect of the utility model, a double-pole double-throw pressure switch is provided, including a joint, a joint base, a first pressure switch body, and a second pressure switch body. The joint is arranged at the front end of the joint base, and the first pressure switch body and the second pressure switch body are arranged in parallel at the rear end of the joint base. The joint is provided with a radial joint through-hole, the joint base is provided with a transverse joint base through-hole, the joint through-hole and the joint base through-hole are communicated, and the joint base through-hole is respectively communicated with the first pressure switch body and the second pressure switch body.

[0010] In the utility model, the first pressure switch body and the second pressure switch body can be any finished pressure switch in the prior art.

[0011] Preferably, the joint includes a metal rod body and a nut. The nut is sleeved on the metal rod body. The diameters of both ends of the metal rod body are different. One section of the metal rod body connecting the joint base has a smaller diameter. Threads are also provided at both ends of the metal rod body, and the joint is threadedly connected to the joint base.

[0012] In the utility model, the joint and the joint base are ingeniously designed. The pressure detected by one joint is accurately and timely transmitted to two groups of pressure switch bodies through the joint base.

[0013] Preferably, the thresholds of the first pressure switch body and the second pressure switch body are different.

[0014] In the utility model, the first pressure switch body and the second pressure switch body are respectively used to measure high pressure and low pressure.

[0015] Preferably, it further includes a first plug, a first socket, a first sealing cover, a second plug, a second socket, and a second sealing cover. The first plug is connected to the end of the first pressure switch body through an electric wire. The first plug is inserted into the first socket, and the first plug and the first socket are connected through the first sealing cover. The second plug is connected to the end of the second pressure switch body through an electric wire. The second plug is inserted into the second socket, and the second plug and the second socket are connected through the second sealing cover.

[0016] Preferably, the first socket and the second socket are respectively provided with interfaces matching the first plug and the second plug, and one side of the first socket and the second socket is provided with an interface connected to the outside through an electric wire.

[0017] Preferably, it further includes a housing, a connector and a cable joint. The first pressure switch body and the second pressure switch body are respectively connected to the connector, the connector is connected to the cable joint, and the first pressure switch body, the second pressure switch body and the connector are all placed inside the housing.

[0018] Preferably, the connector includes double-row wiring terminals, and the number of wiring terminals in each row is not less than 6.

[0019] In the present utility model, two groups of pressure switches can be connected through the connector and the cable joint, making the whole design more reasonable and compact. The whole device can be placed inside a box body.

[0020] Preferably, both the first switch body and the second switch body include an upper seat of the connector, a diaphragm, a piston, a piston base, a top plate, an induction piston, a spring, a lower seat of the connector, an adjusting screw and an induction switch. The upper seat of the connector is connected to the lower seat of the connector, and the interiors of the upper seat of the connector and the lower seat of the connector are hollow. The diaphragm, the piston, the induction piston, the spring, the piston base and the induction switch are all placed inside the upper seat of the connector and the lower seat of the connector; the diaphragm is provided with an oil hole, the piston is placed in the lower seat of the connector in a floating manner up and down, the induction piston is a cylinder with a U-shaped groove inside, the piston base is a cylindrical T-shape, one end of the piston base is inserted into the spring, the other end of the piston base abuts against the outside of the spring, the piston base and the spring are both placed in the U-shaped groove, when the piston floats up and down, it can abut against the induction piston, thereby driving the induction piston to move up and down, and the induction piston can move to abut against the induction switch, and the induction switch is arranged on the adjusting screw.

[0021] Preferably, the connector base is fixed inside the housing by bolts.

[0022] Preferably, the housing is a cube.

[0023] Preferably, the first pressure switch body and the second pressure switch body are respectively threadedly connected to the connector base, and a sealing ring is provided at the connection part.

[0024] The usage method of the double-pole double-throw pressure switch of the present utility model includes the following steps:

[0025] S1. Install each component of the double-pole double-throw pressure switch in sequence;

[0026] S2. Drop oil into the connector of the double-pole double-throw pressure switch, and the oil pressure flows through the connector to the connector base.

[0027] S3. When the pressure reaches the preset value range of the first pressure switch body, the diaphragm of the first pressure switch is subjected to the oil pressure; the pressure forces the piston to move downward. When the piston floats up and down, it can abut against the induction piston, thereby driving the induction piston to move up and down. The induction piston can move to abut against the induction switch, and the sensor circuit is connected.

[0028] S4. When the pressure exceeds the preset value range of the first pressure switch body, the first pressure switch body closes.

[0029] S5. When the pressure reaches the preset value range of the second pressure switch body, the diaphragm of the second pressure switch is subjected to the oil pressure; the pressure forces the piston to move downward. When the piston floats up and down, it can abut against the induction piston, thereby driving the induction piston to move up and down. The induction piston can move to abut against the induction switch, and the sensor circuit is connected.

[0030] Compared with the prior art, the beneficial effects and remarkable progress of the present utility model are as follows: The present utility model provides a new and novel double-pole double-throw pressure switch. Through the design of the connector, connector base, etc., precise and sensitive dual-threshold detection can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] To more clearly illustrate the technical solutions of the present utility model, the following will briefly introduce the drawings required for the embodiments of the present utility model.

[0032] Obviously, the drawings in the following description are only the drawings of some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings, but these other drawings also belong to the scope of the drawings required for the embodiments of the present utility model.

[0033] Figure 1 It is a schematic structural diagram of a double-pole double-throw pressure switch according to Embodiment 1 of the present utility model;

[0034] Figure 2 It is an exploded view of a double-pole double-throw pressure switch according to Embodiment 1 of the present utility model;

[0035] Figure 3 It is a schematic structural diagram of another double-pole double-throw pressure switch according to Embodiment 2 of the present utility model;

[0036] Figure 4 It is an exploded view of another double-pole double-throw pressure switch according to Embodiment 2 of the present utility model;

[0037] In the figure, 1 is a connector, 2 is a connector base, 3 is the body of the first pressure switch, 4 is the body of the second pressure switch, 5 is a sealing ring, 6 is a first plug, 7 is a first sealing cover, 8 is a first socket, 9 is a housing, 10 is a cable connector, 11 is a connector, 12 is a bolt, 3.1 is an upper seat, 3.2 is a diaphragm, 3.3 is a piston, 3.4 is a piston base, 3.5 is a top plate, 3.6 is an induction piston, 3.7 is a spring, 3.8 is a lower seat of the joint, 3.9 is an adjusting screw, and 3.10 is an induction switch. Detailed implementation manners

[0038] To make the objectives, technical solutions, beneficial effects and remarkable progress of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings provided in the embodiments of the present utility model.

[0039] Obviously, all these described embodiments are only partial embodiments of the present utility model, rather than all embodiments; based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present utility model.

[0040] It should be noted that the terms "first", "second" and "third" (if any) in the description, claims and accompanying drawings of the present utility model are only used to distinguish different objects, rather than to describe a specific order. In addition, the term "comprising" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products or devices.

[0041] It should be understood that:

[0042] In the present utility model, unless otherwise clearly defined and limited, the terms "installed", "connected", "fixed" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or a movable connection, or even integrated; it can be a direct connection, an indirect connection through an intermediate medium or an invisible signal connection, or even an optical connection. It can be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined.

[0043] For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0044] It should also be noted that the following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.

[0045] Next, the technical solution of the present utility model will be described in detail with specific embodiments.

[0046] Embodiment 1

[0047] As Figure 1-2 shown, a double-pole double-throw pressure switch includes a joint 1, a joint base 2, a first pressure switch body 3 and a second pressure switch body 4. The joint 1 is arranged at the front end of the joint base 2, and the first pressure switch body 3 and the second pressure switch body 4 are arranged in parallel at the rear end of the joint base 2. The joint 1 is provided with a radial joint through-hole, and the joint base 2 is provided with a transverse joint base through-hole. The joint through-hole and the joint base through-hole are communicated, and the joint base through-hole is respectively communicated with the first pressure switch body 3 and the second pressure switch body 4.

[0048] In this embodiment, the joint 1 includes a metal rod body and a nut. The nut is sleeved on the metal rod body. The diameters of the two ends of the metal rod body are different. One end of the metal rod body connected to the joint base 2 has a smaller diameter. Threads are also provided at both ends of the metal rod body, and the joint 1 and the joint base 2 are threadedly connected.

[0049] In this embodiment, the thresholds of the first pressure switch body 3 and the second pressure switch body 4 are different.

[0050] In this embodiment, it further includes a first plug 6, a first socket 8, a first sealing cover 7, a second plug, a second socket and a second sealing cover. The first plug 6 is connected to the end of the first pressure switch body 4 through a wire. The first plug 6 is inserted into the first socket 8, and the first plug 6 and the first socket 8 are connected through the first sealing cover 7; the second plug is connected to the end of the second pressure switch body 4 through a wire. The second plug is inserted into the second socket, and the second plug and the second socket are connected through the second sealing cover.

[0051] In this embodiment, the first socket 8 and the second socket are respectively provided with interfaces matching the first plug 6 and the second plug. One side of the first socket 8 and the second socket is provided with an interface connected to the outside through a wire.

[0052] In this embodiment, the first switch body 3 and the second switch body 4 are the same. The first switch body 3 includes an upper connector seat 3.1, a diaphragm 3.2, a piston 3.3, a piston base 3.4, a top plate 3.5, an induction piston 3.6, a spring 3.7, a lower connector seat 3.8, an adjusting screw 3.9, and an induction switch 3.10. The upper connector seat 3.1 is connected to the lower connector seat 3.8, and the interiors of the upper connector seat 3.1 and the lower connector seat 3.8 are hollow. The diaphragm 3.2, the piston 3.3, the induction piston 3.6, the spring 3.7, the piston base 3.4, and the induction switch 3.10 are all disposed inside the upper connector seat 3.1 and the lower connector seat 3.8. The diaphragm 3.2 is provided with an oil hole. The piston 3.3 is floatingly disposed up and down inside the lower connector seat 3.8. The piston 3.3 includes a piston rod and a piston cap. The piston rod is cylindrical, and the piston cap is a disc provided at the top end of the piston rod. The induction piston 3.6 is a cylinder with a U-shaped groove inside. The piston base 3.4 is a cylindrical T-shaped. One end of the piston base 3.4 is inserted into the spring 3.7, and the other end of the piston base 3.4 abuts against the outside of the spring 3.7. The piston base 3.4 and the spring 3.7 are both disposed inside the U-shaped groove. When the piston 3.3 floats up and down, it can abut against the induction piston 3.6, thereby driving the induction piston 3.6 to move up and down. The induction piston 3.6 can move to abut against the induction switch 3.10, and the induction switch 3.10 is disposed on the adjusting screw 3.9.

[0053] In this embodiment, the first pressure switch body 3 and the second pressure switch body 4 are respectively threadedly connected to the joint base 2, and a sealing ring 5 is provided at the connection.

[0054] Embodiment 2

[0055] As Figure 3-4 shown, a double-pole double-throw pressure switch includes a joint 1, a joint base 2, a first pressure switch body 3, and a second pressure switch body 4. The joint 1 is disposed at the front end of the joint base 2. The first pressure switch body 3 and the second pressure switch body 4 are arranged in parallel at the rear end of the joint base 2. The joint 1 is provided with a radial joint through-hole. The joint base 2 is provided with a transverse joint base through-hole. The joint through-hole and the joint base through-hole are communicated. The joint base through-hole is respectively communicated with the first pressure switch body 3 and the second pressure switch body 4.

[0056] In this embodiment, the joint 1 includes a metal rod body and a nut. The nut is sleeved on the metal rod body. The diameters of the two ends of the metal rod body are different. One end of the metal rod body connected to the joint base 2 has a smaller diameter. Threads are also provided at both ends of the metal rod body. The joint 1 and the joint base 2 are threadedly connected.

[0057] In this embodiment, the thresholds of the first pressure switch body 3 and the second pressure switch body 4 are different.

[0058] In this embodiment, it further includes a housing 9, a connector 11, and a cable connector 10. The first pressure switch body 3 and the second pressure switch body 4 are respectively connected to the connector 11, the connector 11 is connected to the cable connector 10, and the first pressure switch body 3, the second pressure switch body 4, and the connector 11 are all placed inside the housing 9.

[0059] In this embodiment, the connector 11 includes double-row wiring terminals, and the number of wiring terminals in each row is 6.

[0060] In this embodiment, the first switch body 3 and the second switch body 4 are the same. The first switch body 3 includes an upper connector seat 3.1, a diaphragm 3.2, a piston 3.3, a piston base 3.4, a top plate 3.5, an induction piston 3.6, a spring 3.7, a lower connector seat 3.8, an adjustment screw 3.9, and an induction switch 3.10. The upper connector seat 3.1 is connected to the lower connector seat 3.8, and the interiors of the upper connector seat 3.1 and the lower connector seat 3.8 are hollow. The diaphragm 3.2, the piston 3.3, the induction piston 3.6, the spring 3.7, the piston base 3.4, and the induction switch 3.10 are all placed inside the upper connector seat 3.1 and the lower connector seat 3.8. The diaphragm 3.2 is provided with an oil hole. The piston 3.3 is placed in the lower connector seat 3.8 in a vertically floating manner. The piston 3.3 includes a piston rod and a piston cap. The piston rod is cylindrical, and the piston cap is a circular plate provided at the top end of the piston rod. The induction piston 3.6 is a cylinder with a U-shaped groove inside. The piston base 3.4 is a cylindrical T shape. One end of the piston base 3.4 is inserted into the spring 3.7, and the other end of the piston base 3.4 abuts against the outside of the spring 3.7. The piston base 3.4 and the spring 3.7 are both placed in the U-shaped groove. When the piston 3.3 floats up and down, it can abut against the induction piston 3.6, thereby driving the induction piston 3.6 to move up and down. The induction piston 3.6 can move to abut against the induction switch 3.10, and the induction switch 3.10 is arranged on the adjustment screw 3.9.

[0061] In this embodiment, the joint base 2 is fixed inside the housing 9 by bolts 12.

[0062] In this embodiment, the housing 9 is a cube.

[0063] In this embodiment, the first pressure switch body 3 and the second pressure switch body 4 are respectively threadedly connected to the joint base 2, and a sealing ring 5 is provided at the connection.

[0064] Embodiment 3

[0065] The usage method of the double-pole double-throw pressure switch in Embodiment 1 and 2 includes the following steps:

[0066] S1. Install the components of the double-pole double-throw pressure switch in sequence;

[0067] S2. Drop oil into the joint of the double-pole double-throw pressure switch, and the oil pressure flows from the joint to the joint base;

[0068] S3. When the pressure reaches the preset value range of the first pressure switch body, the diaphragm of the first pressure switch is subjected to the pressure of the oil; the pressure forces the piston to move downward. When the piston floats up and down, it can abut against the induction piston, thereby driving the induction piston to move up and down. The induction piston can move to abut against the induction switch, and the sensor circuit is connected.

[0069] S4. When the pressure exceeds the preset value range of the first pressure switch body, the first pressure switch body closes.

[0070] S5. When the pressure reaches the preset value range of the second pressure switch body, the diaphragm of the second pressure switch is subjected to the pressure of the oil; the pressure forces the piston to move downward. When the piston floats up and down, it can abut against the induction piston, thereby driving the induction piston to move up and down. The induction piston can move to abut against the induction switch, and the sensor circuit is connected.

[0071] In the description process of the above specification:

[0072] Descriptions of terms such as "this embodiment", "embodiment of the present utility model", "as shown in...", "further", "further improved technical solution", etc. mean that the specific features, structures, materials or characteristics described in the embodiment or example are included in at least one embodiment or example of the present utility model; in this specification, the schematic expressions of the above terms are not necessarily directed to the same embodiment or example, and moreover, the specific features, structures, materials or characteristics described can be combined or combined in a suitable manner in any one or more embodiments or examples; in addition, on the premise of not generating contradictions, those of ordinary skill in the art can combine or combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0073] Finally, it should be noted that:

[0074] The above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit it;

[0075] Although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present utility model. Non-essential improvements, adjustments or replacements made by those skilled in the art according to the content of this specification all fall within the scope protected by the present utility model.

Claims

1. A double-pole double-throw pressure switch, characterized in that, It includes a connector, a connector base, a first pressure switch body and a second pressure switch body. The connector is arranged at the front end of the connector base, and the first pressure switch body and the second pressure switch body are arranged in parallel at the rear end of the connector base. The connector is provided with a radial connector through-hole, the connector base is provided with a transverse connector base through-hole, the connector through-hole and the connector base through-hole are communicated, and the connector base through-hole is respectively communicated with the first pressure switch body and the second pressure switch body.

2. The double-pole double-throw pressure switch according to claim 1, wherein The connector includes a metal rod body and a nut. The nut is sleeved on the metal rod body. The diameters of both ends of the metal rod body are different. The diameter of the section of the metal rod body connecting the connector base is small. Threads are also provided at both ends of the metal rod body, and the connector is threadedly connected with the connector base.

3. The double-pole double-throw pressure switch according to claim 1, characterized in that, The thresholds of the first pressure switch body and the second pressure switch body are different.

4. The double-pole double-throw pressure switch according to claim 1, wherein, It also includes a first plug, a first socket, a first sealing cover, a second plug, a second socket and a second sealing cover. The first plug is connected to the end of the first pressure switch body through an electric wire. The first plug is inserted into the first socket, and the first plug and the first socket are connected through the first sealing cover. The second plug is connected to the end of the second pressure switch body through an electric wire. The second plug is inserted into the second socket, and the second plug and the second socket are connected through the second sealing cover.

5. The double-pole double-throw pressure switch according to claim 4, wherein, Interfaces matching the first plug and the second plug are respectively provided inside the first socket and the second socket. Interfaces for connecting to the outside through electric wires are provided on one side of the first socket and the second socket.

6. The double-pole double-throw pressure switch according to claim 1, wherein It also includes a housing, a connector and a cable connector. The first pressure switch body and the second pressure switch body are respectively connected to the connector. The connector is connected to the cable connector. The first pressure switch body, the second pressure switch body and the connector are all placed inside the housing.

7. The double-pole double-throw pressure switch according to claim 6, wherein The connector includes double-row wiring terminals, and the number of wiring terminals in each row is not less than 6.

8. A double-pole double-throw pressure switch according to claim 1 or 4 or 6, characterized in that, Both the first pressure switch body and the second pressure switch body include an upper connector seat, a diaphragm, a piston, a piston base, a top plate, an induction piston, a spring, a lower connector seat, an adjusting screw and an induction switch. The upper connector seat is connected to the lower connector seat, and the interiors of the upper connector seat and the lower connector seat are hollow. The diaphragm, the piston, the induction piston, the spring, the piston base and the induction switch are all placed inside the upper connector seat and the lower connector seat. The diaphragm is provided with an oil hole. The piston is placed in the lower connector seat so as to be able to float up and down. The induction piston is a cylinder with a U-groove inside. The piston base is a cylindrical T-shape. One end of the piston base is inserted into the spring, and the other end of the piston base abuts against the outside of the spring. The piston base and the spring are both placed in the U-groove. When the piston floats up and down, it can abut against the induction piston, thereby driving the induction piston to move up and down. The induction piston can move to abut against the induction switch, and the induction switch is arranged on the adjusting screw.

9. The double-pole double-throw pressure switch according to claim 6, characterized in that, The joint base is fixed in the housing by bolts.

10. A double-pole double-throw pressure switch according to claim 6, characterized in that, The housing is a cube.

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