Water intake valve structure with selectable water supply, and fire-fighting vehicle comprising same

Abstract

The present invention relates to the technical field of fire-fighting equipment. Disclosed are a water intake valve structure with selectable water supply, and a fire-fighting vehicle comprising same. The water intake valve structure comprises: a body (1), with a set of body water-intake ports (12) and a body water-output port (13) formed on a side of the body; a bonnet (2) sealingly fixed to an open upper portion of the body (1); a valve mechanism (3) arranged in a body cavity (11), with the bottom pivotally supported on a bottom wall (111) of the body cavity, the middle portion fitting with the sides of the body water-intake ports (12) facing the body cavity (11), and the top fitting with the bonnet (2); and a valve-position pivoting and switching mechanism (4) fitting with the top of the valve mechanism (3), wherein the set of body water-intake ports (12) comprise a left water-tank connection pipe port (121) formed on the left side of the body (1), a right water-tank connection pipe port (122) formed on the right side of the body (1), a left external water-source hose connection port (123) formed on the front left end of the body (1), and a right external water-source hose connection port (124) formed on the front right end of the body (1), and the body water-output port (13) is formed in the middle of the rear side of the body (1). The advantages lie in: realizing the shared use of water from water tanks and external water sources such as rivers, ponds and lakes, saving the water stored in the water tanks, and ensuring adequate water supply for a fire-extinguishing site.

Description

Water supply options include inlet valve structures and fire trucks. Technical Field

[0001] This invention belongs to the field of fire-fighting equipment technology, specifically relating to a selectable water inlet valve structure and its fire truck. Background Technology

[0002] As is known, the main, but not absolutely limited, forms of firefighting water used by fire trucks during firefighting and disaster relief operations include: water carried by the fire truck's storage tank (commonly referred to as "water tank"), water supply fire trucks that accompany the main fire trucks or alternately supply water to the fire scene, water drawn from fire hydrants at the fire scene, and water from nearby rivers and ponds as water sources (commonly referred to in the industry as "external environmental water sources"). As is also known in the industry, due to limitations in the structure of the inlet valve (also called "water supply valve"), usually only one of the aforementioned water sources can be selected, which cannot meet the requirement of switching between multiple water sources as needed. For example, using a switch valve or three-way valve on the pipeline, although it can meet the requirement of switching between water from the storage tank and the hose, this method of water intake is a single-connection water intake, and the water supply of a single-connection water intake is often limited, that is, it cannot meet the demand for large-volume water supply. In typical cases, for fires that are relatively small and minor, the water in the fire truck's own tank may be sufficient to extinguish the fire, or in areas with fire-fighting facilities, the water supply from fire hydrants may suffice. However, in some situations, due to the ferocity and large scale of the fire, not only are multiple fire trucks needed for coordinated firefighting operations, but the water supply becomes a concern. Considering the actual water requirements for firefighting as desired by fire departments, ideally, for the same fire truck, it would be possible to utilize the water carried by the vehicle, water drawn from rivers or ponds via hoses, or a combination of both (including river / pond water and water from the fire truck's tank, or water from fire hydrants and the fire truck's tank) to conserve water in the fire truck's own tank, depending on the specific fire situation. However, the current design of fire truck inlet valves cannot yet meet these all-encompassing requirements. Summary of the Invention

[0003] The objective of this invention is to provide a selectable inlet valve structure that helps to selectively select the type of fire-fighting water based on the severity and extent of the fire, thereby ensuring sufficient water supply to the fire-fighting site.

[0004] Another objective of the present invention is to provide a fire truck equipped with the aforementioned inlet valve structure to meet the requirement of selectable water supply.

[0005] The objective of this invention is achieved as follows: a selectable water supply inlet valve structure includes a valve body with a set of valve body inlet ports and a valve body outlet port on its side, communicating with a valve body cavity. The valve body outlet port is connected to the water pump inlet port of a water pump during use. A valve cover is sealed and fixed to the upper open portion of the valve body. A valve mechanism is disposed within the valve body cavity, with its bottom pivotally supported on the bottom wall of the valve body cavity. The middle portion of the valve mechanism mates with the side of the valve body inlet port facing the valve body cavity. The top of the structure rotates and extends above the valve cover; the valve position pivoting switching mechanism engages with the top of the valve mechanism at a position corresponding to the top of the valve cover, characterized in that the set of valve body water inlet interfaces includes a water tank left connecting pipe interface on the left side of the valve body, a water tank right connecting pipe interface on the right side of the valve body, an external environmental water source water hose left connecting port on the front left end of the valve body, and an external environmental water source water hose right connecting port on the front right end of the valve body, and the valve body water outlet interface is located at the center of the rear side of the valve body.

[0006] In a specific embodiment of the present invention, a valve cover sealing ring groove is formed on the upward-facing side surface of the upper open portion of the valve body and around the circumference of the valve body. A valve cover sealing ring is embedded in the valve cover sealing ring groove, and valve cover fixing screw holes are spaced apart around the outer side of the valve cover sealing ring groove. Valve cover screw holes are formed on the valve cover at positions corresponding to the valve cover fixing screw holes. The valve cover screws are screwed into the valve cover fixing screw holes at positions corresponding to the valve cover screw holes to fix the valve seat to the upper open portion of the valve body, and the valve cover sealing ring forms a seal between the downward-facing edge portion of the valve cover and the upper open portion of the valve body.

[0007] In another specific embodiment of the present invention, a left valve cover bearing seat is formed at the center of the left end of the valve cover, and a right valve cover bearing seat is formed at the center of the right end of the valve cover; a left valve rotation support seat is formed in the valve body cavity of the valve body at the junction of the left connection pipe interface of the water tank and the left connection port of the external environmental water source facing the valve body cavity, and a right valve rotation support seat is formed at the junction of the right connection pipe interface of the water tank and the right connection port of the external environmental water source facing the valve body cavity; the left valve cover bearing seat and the left valve rotation support seat are on the same longitudinal axis, and the right valve cover bearing seat and the right valve rotation support seat are on the same longitudinal axis; the valve mechanism rotates and engages with the left valve cover bearing seat and the left valve rotation support seat, and also rotates and engages with the right valve cover bearing seat and the right valve rotation support seat; the valve position pivoting switching mechanism engages with the top of the valve mechanism at a position above the left valve cover bearing seat and the right valve cover bearing seat.

[0008] In another specific embodiment of the present invention, a water tank left connecting pipe interface sealing ring is fixed in the water tank left connecting pipe interface by screws, a water tank right connecting pipe interface sealing ring is fixed in the water tank right connecting pipe interface by screws, an external environment water source water hose left connecting port sealing ring is fixed in the external environment water source water hose left connecting port by screws, and an external environment water source water hose right connecting port sealing ring is fixed in the external environment water source water hose right connecting port by screws.

[0009] In another specific embodiment of the present invention, the valve mechanism includes a left switching valve and a right switching valve. A left switching valve upper support shaft arm plate extends to the right from the top of the left switching valve. A left switching valve upper support shaft is fixed to the upward-facing side of the left switching valve upper support shaft arm plate. The lower end of the left switching valve upper support shaft is rotatably engaged with the left shaft seat of the valve cover. The upper end of the left switching valve upper support shaft is configured as a left switching valve upper support shaft square head, and this square head extends above the left shaft seat of the valve cover. A left switching valve lower support shaft arm plate extends to the right from the bottom of the left switching valve. A left switching valve lower support shaft arm plate is fixed to the downward-facing side of the left switching valve lower support shaft arm plate. A lower support shaft for the left switching valve is rotatably supported on the left valve rotating support seat. The left switching valve rotates clockwise or counterclockwise between the left connection pipe interface of the water tank and the left connection port of the external environmental water source hose. When it rotates to the point of contact with the left connection pipe interface of the water tank, it closes the left connection pipe interface of the water tank and simultaneously opens the left connection port of the external environmental water source hose. A right switching valve upper support shaft arm plate extends to the left from the top of the right switching valve. A right switching valve upper support shaft is fixed to the upward-facing side of the upper support shaft arm plate of the switching valve. The lower end of the right switching valve upper support shaft is rotatably engaged with the right shaft seat of the valve cover, while the upper end of the right switching valve upper support shaft is configured as a square head, extending above the right shaft seat of the valve cover. A right switching valve lower support shaft arm plate extends to the left from the bottom of the right switching valve, and a right switching valve lower support shaft is fixed to the downward-facing side of the right switching valve lower support shaft arm plate. The right switching valve lower support shaft is rotatably supported on the right valve rotation support seat. The valve position pivoting switching mechanism is located on the upper side corresponding to the left shaft seat and the right shaft seat of the valve cover. The position of the square valve is matched with the square head of the support shaft on the left switching valve and the square head of the support shaft on the right switching valve. The right switching valve rotates clockwise or counterclockwise between the right connection pipe interface of the water tank and the right connection port of the external environmental water source hose. When it rotates to the point of contact with the right connection pipe interface of the water tank, it closes the right connection pipe interface of the water tank and opens the right connection port of the external environmental water source hose. When the right switching valve rotates to the point of contact with the right connection port of the external environmental water source hose, it closes the right connection port of the external environmental water source hose and opens the right connection pipe interface of the water tank. The opposite sides of the left and right switching valves are each formed into an arc-shaped surface.

[0010] In another specific embodiment of the present invention, a valve cover left shaft seat hole is formed at the center of the valve cover left shaft seat for rotatable engagement with the upper support shaft of the left switching valve. A pair of left switching valve upper support shaft sealing rings are embedded on the upper support shaft of the left switching valve, and the pair of left switching valve upper support shaft sealing rings are in sealing engagement with the hole wall of the valve cover left shaft seat hole. A valve cover right shaft seat hole is formed at the center of the valve cover right shaft seat for rotatable engagement with the upper support shaft of the right switching valve. A pair of right switching valve upper support shaft sealing rings are embedded on the upper support shaft of the right switching valve, and the pair of right switching valve upper support shaft sealing rings are in sealing engagement with the hole wall of the valve cover right shaft seat hole.

[0011] In a further specific embodiment of the present invention, the valve position pivoting switching mechanism includes a manual operating device for a left switching valve upper support shaft and a manual operating device for a right switching valve upper support shaft. The manual operating device for the left switching valve upper support shaft engages with the square head of the left switching valve upper support shaft at a position corresponding to the left shaft seat of the valve cover, and the manual operating device for the right switching valve upper support shaft engages with the square head of the right switching valve upper support shaft at a position corresponding to the right shaft seat of the valve cover.

[0012] In a further specific embodiment of the present invention, a pair of left arc-tooth plate fixing ears are formed on the outer wall of the left shaft seat of the valve cover, the pair of left arc-tooth plate fixing ears being spaced 180° apart from each other in the circumferential direction of the left shaft seat of the valve cover; the manual operating device of the upper support shaft of the left switching valve includes a left operating handle, a left operating sleeve, a left locking handle and a left arc-tooth plate, the left arc-tooth plate being fixed to the left shaft seat of the valve cover by a pair of left arc-tooth plate fixing screws at positions corresponding to the left arc-tooth plate fixing ears, a pair of left arc-tooth plate stops are formed at the edge of the left arc-tooth plate, the pair of left arc-tooth plate stops being spaced 180° apart from each other in the circumferential direction of the left arc-tooth plate, a left arc-tooth plate clearance hole is formed on the left arc-tooth plate at a position corresponding to the left shaft seat hole of the valve seat, the square head of the upper support shaft of the left switching valve extends to Above the clearance hole of the left arc tooth plate, the left operating sleeve is fixed to the right end of the left operating handle facing downwards and cooperates with the square head of the support shaft on the left switching valve. The left end of the left operating handle is configured as a manual operation gripping end. The left locking handle is located below the left operating handle. The right end of the left locking handle is hinged to the left operating handle through the left locking handle hinge pin. A left locking handle return spring is provided in the middle. The lower end of the left locking handle return spring is supported on the left locking handle, while the upper end is supported on the left operating handle facing downwards. The left end of the left locking handle is configured as a free end. In the left locking handle, on the front side and to the right of the left locking handle hinge pin, there is a left limiting flange that cooperates with or disengages from the tooth groove of the left arc tooth plate.

[0013] In yet another specific embodiment of the present invention, a pair of right arc-tooth plate fixing ears are formed on the outer wall of the right shaft seat of the valve cover, the pair of right arc-tooth plate fixing ears being spaced 180° apart from each other in the circumferential direction of the right shaft seat of the valve cover; the manual operating device of the upper support shaft of the right switching valve includes a right operating handle, a right operating sleeve, a right locking handle and a right arc-tooth plate, the right arc-tooth plate being fixed to the right shaft seat of the valve cover by a pair of right arc-tooth plate fixing screws at positions corresponding to the right arc-tooth plate fixing ears, a pair of right arc-tooth plate stops are formed at the edge of the right arc-tooth plate, the pair of right arc-tooth plate stops being spaced 180° apart from each other in the circumferential direction of the right arc-tooth plate, a right arc-tooth plate clearance hole is formed on the right arc-tooth plate at a position corresponding to the right shaft seat hole of the valve seat, the right upper support shaft of the right switching valve extends outwards. Above the right arc-tooth plate clearance hole, the right operating sleeve is fixed to the left end of the right operating handle facing downwards and mates with the square head of the support shaft on the right switching valve. The right end of the right operating handle is configured as a manual operating grip end. The right locking handle is located below the right operating handle. The right end of the right locking handle is hinged to the right operating handle via a right locking handle hinge pin. A right locking handle return spring is provided in the middle. The lower end of the right locking handle return spring is supported on the right locking handle, while the upper end is supported on the right operating handle facing downwards. The right end of the right locking handle is configured as a free end. In the position in front of the right locking handle and to the left of the right locking handle hinge pin, there is a right limiting flange that mates with or dismates with the right arc-tooth plate tooth groove on the right arc-tooth plate.

[0014] Another objective of the present invention is accomplished by providing a fire truck equipped with the aforementioned water inlet valve structure.

[0015] The technical advantages of the present invention are as follows: The valve mechanism can be rotated clockwise or counterclockwise via a valve position pivoting switching mechanism. When the valve mechanism rotates to the point where it contacts and engages with the left and right connecting pipe interfaces of the water tank, the left and right connecting pipe interfaces of the water tank are closed, while the left and right connecting ports of the external environmental water source are opened, allowing water from sources such as rivers, ponds, and lakes to be used for firefighting. When the valve mechanism rotates to the point where it contacts and engages with the left and right connecting ports of the external environmental water source, the left and right connecting ports of the external environmental water source are closed, allowing water from the fire truck's water tank to be used for firefighting and disaster relief. When the valve mechanism rotates to the point where it contacts and engages with one of the left and right connecting pipe interfaces of the water tank and simultaneously with one of the left and right connecting ports of the external environmental water source, water can be supplied from the other interface of the left and right connecting pipe interfaces of the water tank and the other connecting port of the left and right connecting ports of the external environmental water source, thus enabling the sharing of water from the water tank and water from the external environment such as rivers, ponds, and lakes, thereby saving water from the water tank. It can select the appropriate type of fire-fighting water based on the severity and size of the fire, ensuring sufficient water supply to the fire scene; the aforementioned water inlet valve structure on the fire truck can meet the fire truck's requirement for flexible selection of water source during fire fighting and disaster relief. Attached Figure Description

[0016] Figure 1 is an assembly structure diagram of the present invention;

[0017] Figure 2 is a top view of the present invention after assembly as shown in Figure 1 and after the valve cover has been removed;

[0018] Figure 3 is a schematic diagram of an application example of the present invention. Detailed Implementation

[0019] In order to better understand the technical essence and beneficial effects of the present invention, the applicant provides a detailed description below by way of embodiments. However, the description of the embodiments is not intended to limit the present invention. Any formal but not substantive equivalent transformations made based on the concept of the present invention should be considered within the scope of the present invention.

[0020] In the following description, all directional or orientational concepts involving up, down, left, right, front, and back, unless otherwise specified, are based on the position shown in Figure 1 and should not be construed as a special limitation on the technical solution provided by the present invention.

[0021] Please refer to Figure 1, which shows a valve body 1. A set of valve body inlet ports 12 and a valve body outlet port 13, communicating with a valve body cavity 11, are formed on the side of the valve body 1. The valve body outlet port 13, in use, is connected to the water pump inlet port 51 of the water pump 5 shown in Figure 3. A valve cover 2 is shown, which is sealed and fixed to the upper open position of the aforementioned valve body 1. A valve mechanism 3 is shown, which is disposed within the aforementioned valve body cavity 11. The bottom of the valve mechanism 3 is pivotally supported on the bottom wall 111 of the valve body cavity 11. The middle part of the valve mechanism 3 engages with the side of the valve body inlet port 12 facing the valve body cavity 11, while the top of the valve mechanism 3 rotatably engages with the aforementioned valve cover 2 and extends above the valve cover 2. A valve position pivoting mechanism 4 engages with the top of the aforementioned valve mechanism 3 at a position corresponding to the position above the aforementioned valve cover 2.

[0022] The key technical points of the present invention are as follows: The aforementioned set of valve body water inlet ports 12 includes a water tank left connecting pipe port 121 on the left side of the valve body 1, a water tank right connecting pipe port 122 on the right side of the valve body 1, an external environmental water source left connecting port 123 on the front left end of the valve body 1, and an external environmental water source right connecting port 124 on the front right end of the valve body 1. The aforementioned valve body water outlet port 13 is located in the center of the rear side of the valve body 1. The aforementioned water tank left and right connecting pipe ports 121 and 122, and external environmental water source left and right connecting ports 123 and 124 are undoubtedly connected to the valve body cavity 11, that is, used to introduce water into the valve body cavity 11. The aforementioned external environmental water source is not limited to natural water sources such as rivers, ponds, and lakes.

[0023] Referring to Figure 1, a valve cover sealing ring groove 14 is formed on the upper open portion of the valve body 1 facing upwards and around the valve body 1. A valve cover sealing ring 141 is embedded in the valve cover sealing ring groove 14. Valve cover fixing screw holes 15 are also spaced apart around the outer side of the valve cover sealing ring groove 14. On the valve cover 2, valve cover screw holes 21 are formed at positions corresponding to the valve cover fixing screw holes 15. The valve cover screw 211 is screwed into the valve cover fixing screw holes 15 at positions corresponding to the valve cover screw holes 21 to fix the valve seat 2 to the upper open portion of the valve body 1. The valve cover sealing ring 141 forms a seal between the lower edge portion of the valve cover 2 and the upper open portion of the valve body 1.

[0024] Referring to Figure 1, a left valve cover bearing 22 is formed at the center of the left end of the aforementioned valve cover 2, and a right valve cover bearing 23 is formed at the center of the right end of the valve cover 2. Inside the valve body cavity 11 of the aforementioned valve body 1, at the junction of the left connection pipe interface 121 of the aforementioned water tank and the left connection port 123 of the external environmental water source hose facing towards the valve body cavity 11, a left valve rotation support 112 is formed, and at the junction of the right connection pipe interface 122 of the aforementioned water tank and the right connection port 124 of the external environmental water source hose facing towards the valve body cavity 11, a right valve rotation support 112 is formed. The valve cover is a movable support seat 113, and the aforementioned valve cover left shaft seat 22 and left valve rotating support seat 112 are on the same longitudinal axis, while the aforementioned valve cover right shaft seat 23 and right valve rotating support seat 113 are on the same longitudinal axis; the aforementioned valve mechanism 3 is rotatably engaged with the valve cover left shaft seat 22 and left valve rotating support seat 112, and is also rotatably engaged with the valve cover right shaft seat 23 and right valve rotating support seat 113; the aforementioned valve position pivot switching mechanism 4 is positioned above the aforementioned valve cover left shaft seat 22 and valve cover right shaft seat 23 and engages with the top of the aforementioned valve mechanism 3.

[0025] A water tank left connecting pipe interface sealing ring 1211 is fixed with screws in the aforementioned water tank left connecting pipe interface 121; a water tank right connecting pipe interface sealing ring 1221 is fixed with screws in the aforementioned water tank right connecting pipe interface 122; an external environment water source hose left connecting port sealing ring 1231 is fixed with screws in the aforementioned external environment water source hose left connecting port 123; and an external environment water source hose right connecting port sealing ring 1241 is fixed with screws in the aforementioned external environment water source hose right connecting port 124. The aforementioned water tank left and right connecting pipe interface sealing rings 1211 and 1221, as well as the external environment water source hose left and right connecting port sealing rings 1231 and 1241, are each rubber sealing rings, and each end facing the valve body cavity 11 forms a sealing ring sealing flange edge to form a good seal with the valve mechanism 3, which will be described in detail below.

[0026] The aforementioned valve mechanism 3 includes a left switching valve 31 and a right switching valve 32. A left switching valve upper support shaft arm plate 311 extends to the right from the top of the left switching valve 31. A left switching valve upper support shaft 3111 is fixed to the upward-facing side of the left switching valve upper support shaft arm plate 311. The lower end of the left switching valve upper support shaft 3111 is rotatably engaged with the aforementioned valve cover left shaft seat 22, while the upper end of the left switching valve upper support shaft 3111 is configured as a left switching valve upper support shaft square head 31111, and this left switching valve upper support shaft square head 31111 extends to the valve cover left shaft seat 22. Above 2, a left switching valve lower support shaft arm plate 312 extends to the right from the bottom of the left switching valve 31. A left switching valve lower support shaft 3121 is fixed on the downward-facing side of the left switching valve lower support shaft arm plate 312. The left switching valve lower support shaft 3121 is rotatably supported on the aforementioned left valve rotation support seat 112. The left switching valve 31 rotates clockwise or counterclockwise between the aforementioned water tank left connection pipe interface 121 and the external environment water source water hose left connection port 123. When it rotates to the point of contact and engagement with the water tank left connection pipe interface 121, it controls the water tank. The left connecting pipe interface 121 is closed, while the left connecting port 123 of the external environmental water source hose is opened. When the left switching valve 31 is rotated to the point of contact with the left connecting port 123 of the external environmental water source hose, it closes the left connecting port 123 of the external environmental water source hose and opens the left connecting pipe interface 121 of the water tank. A right switching valve upper support shaft arm plate 321 extends to the left from the top of the right switching valve 32. A right switching valve upper support shaft 3211 is fixed on the upward-facing side of the right switching valve upper support shaft arm plate 321. The lower end of 1 is rotatably engaged with the aforementioned valve cover right shaft seat 23, and the upper end of the right switching valve upper support shaft 3211 is configured as a right switching valve upper support shaft square head 32111, and the right switching valve upper support shaft square head 32111 extends to the top of the valve cover right shaft seat 23. A right switching valve lower support shaft arm plate 322 extends to the left from the bottom of the right switching valve 32, and a right switching valve lower support shaft 3221 is fixed on the downward side of the right switching valve lower support shaft arm plate 322. The right switching valve lower support shaft 3221 is rotatably supported on the aforementioned right valve rotating support seat 113.The aforementioned valve position pivoting switching mechanism 4, positioned above the aforementioned left valve cover bearing 22 and right valve cover bearing 23, engages with the aforementioned left switching valve upper support shaft square head 31111 and right switching valve upper support shaft square head 32111. The right switching valve 32 rotates clockwise or counterclockwise between the aforementioned right water tank connection pipe interface 122 and the external environment water source hose right connection port 124. When it rotates to the point of contact with the right water tank connection pipe interface 122, it closes the right water tank connection pipe interface 122 and simultaneously opens the external environment water source hose right connection port 124. Conversely, when the right switching valve 32 rotates to the point of contact with the external environment water source hose right connection port 124, it closes the external environment water source hose right connection port 124 and simultaneously opens the right water tank connection pipe interface 122.

[0027] Referring to Figure 1, a valve cover left shaft seat hole 221 is formed at the center of the aforementioned valve cover left shaft seat 22 for rotatable engagement with the aforementioned left switching valve upper support shaft 3111. A pair of left switching valve upper support shaft sealing rings 31112 are embedded in the aforementioned left switching valve upper support shaft 31111, and the pair of left switching valve upper support shaft sealing rings 31112 are sealed in engagement with the hole wall of the aforementioned valve cover left shaft seat hole 221. A valve cover right shaft seat hole 231 is formed at the center of the aforementioned valve cover right shaft seat 23 for rotatable engagement with the aforementioned right switching valve upper support shaft 3211. A pair of right switching valve upper support shaft sealing rings 32112 are embedded in the aforementioned right switching valve upper support shaft 3211, and the pair of right switching valve upper support shaft sealing rings 32112 are sealed in engagement with the hole wall of the aforementioned valve cover right shaft seat hole 231.

[0028] Referring to Figure 1, the aforementioned valve position pivoting switching mechanism 4 includes a manual operating device 41 for the upper support shaft of the left switching valve and a manual operating device 42 for the upper support shaft of the right switching valve. The manual operating device 41 for the upper support shaft of the left switching valve is positioned above the aforementioned left shaft seat 22 of the valve cover and engages with the aforementioned square head 31111 of the upper support shaft of the left switching valve. The manual operating device 42 for the upper support shaft of the right switching valve is positioned above the aforementioned right shaft seat 23 of the valve cover and engages with the aforementioned square head 32111 of the upper support shaft of the right switching valve.

[0029] A pair of left arc-tooth plate fixing ears 222 are formed on the outer wall of the aforementioned valve cover left shaft seat 22. The pair of left arc-tooth plate fixing ears 222 are spaced 180° apart from each other in the circumferential direction around the valve cover left shaft seat 22. The aforementioned manual operating device 41 for the left switching valve upper support shaft includes a left operating handle 411, a left operating sleeve 412, a left locking handle 413, and a left arc-tooth plate 414. The left arc-tooth plate 414 is fixed to the aforementioned left arc-tooth plate fixing ears 222 by a pair of left arc-tooth plate fixing screws. The position is fixed to the left shaft seat 22 of the valve cover. A pair of left arc-tooth plate stops 4141 are formed at the edge of the left arc-tooth plate 414. The pair of left arc-tooth plate stops 4141 are spaced 180° apart from each other around the circumference of the left arc-tooth plate 414. A left arc-tooth plate clearance hole 4142 is opened on the left arc-tooth plate 414 at a position corresponding to the aforementioned valve seat left shaft seat hole 221. The aforementioned left switching valve upper support shaft square head 31111 extends into the left arc-tooth plate clearance hole 4142. Above, the left operating sleeve 412 is fixed to the right end of the left operating handle 411 facing downward and cooperates with the square head 31111 of the support shaft on the left switching valve. The left end of the left operating handle 411 is configured as a manual operation grip end. The left locking handle 413 is located below the left operating handle 411. The right end of the left locking handle 413 is hinged to the left operating handle 411 through the left locking handle hinge pin 4131. A left locking handle return spring 4132 is provided in the middle. The lower end of the left locking handle return spring 4132 is supported on the left locking handle 413, and the upper end is supported on the left operating handle 411 facing downward. The left end of the left locking handle 413 is configured as a free end. In the position in front of the left locking handle 413 and to the right of the left locking handle hinge pin 4131, a left limiting flange 4133 is formed to cooperate with or disengage from the left arc tooth plate groove 4143 on the left arc tooth plate 414.

[0030] Referring to Figure 1, a pair of right arc-tooth plate fixing ears 232 are formed on the outer wall of the aforementioned valve cover right shaft seat 23. These two right arc-tooth plate fixing ears 232 are spaced 180° apart from each other around the circumference of the valve cover right shaft seat 23. The aforementioned manual operation device 42 for the right switching valve upper support shaft includes a right operating handle 421, a right operating sleeve 422, a right locking handle 423, and a right arc-tooth plate 424. The right arc-tooth plate 424 is fixed to the aforementioned right arc-tooth plate by a pair of right arc-tooth plate fixing screws. The position of the ear 232 is fixed to the right shaft seat 23 of the valve cover. A pair of right arc-tooth plate stops 4241 are formed at the edge of the right arc-tooth plate 424. The pair of right arc-tooth plate stops 4241 are spaced 180° apart around the circumference of the right arc-tooth plate 424. A right arc-tooth plate clearance hole 4242 is formed on the right arc-tooth plate 424 at a position corresponding to the aforementioned right shaft seat hole 231 of the valve seat. The square head 32111 of the aforementioned right switching valve upper support shaft extends into the right arc-tooth plate clearance hole 42. Above 42, the right operating sleeve 422 is fixed to the left end of the right operating handle 421 facing downward and cooperates with the square head 32111 of the support shaft on the right switching valve. The right end of the right operating handle 421 is configured as a manual operation grip end. The right locking handle 423 is located below the right operating handle 421. The right end of the right locking handle 423 is hinged to the right operating handle 421 through the right locking handle hinge pin 4231. A right locking handle return spring 4232 is provided in the middle. The lower end of the right locking handle return spring 4232 is supported on the right locking handle 423, and the upper end is supported on the right operating handle 421 facing downward. The right end of the right locking handle 423 is configured as a free end. In the front of the right locking handle 423 and on the left side of the right locking handle hinge pin 4231, there is a right limiting flange 4233 that cooperates with or disengages from the right arc tooth plate groove 4243 on the right arc tooth plate 424.

[0031] As shown in Figure 1, the opposite sides of the aforementioned left switching valve 31 and right switching valve 32 are each formed as an arc-shaped surface.

[0032] Please refer to Figure 2 and in conjunction with Figure 1. Taking the current position shown in Figure 2 as an example, the arc-shaped surface of the aforementioned left switching valve 31 is in contact with the sealing flange edge of the sealing ring 1211 of the left connecting pipe interface of the water tank, thus closing the left connecting pipe interface 121 of the water tank. At the same time, the arc-shaped surface of the aforementioned right switching valve 32 is in contact with the sealing flange edge of the sealing ring 1221 of the right connecting pipe interface of the water tank, thus closing the right connecting pipe interface 122 of the water tank. In the aforementioned state, the left and right connection ports 123 and 124 of the external environment water source hose are simultaneously open. If in the fire extinguishing state, one end of each hose is connected to the left and right connection ports 123 and 124 of the external environment water source hose, while the other end of the hose extends to water bodies such as rivers, ponds, and lakes to draw water. The water introduced from the left and right connection ports 123 and 124 of the external environment water source hose into the valve body cavity 11 is led out through the valve body outlet port 13 and used to supply the pipeline connected to the inlet of the water pump (not shown in the figure) to extinguish the fire source.

[0033] Please refer to Figure 3, and in conjunction with Figures 1 and 2. Figure 3 shows a left water supply pipe 6a and a right water supply pipe 6b connected to the water tank of the fire truck (hereinafter referred to as the water tank). The left and right water supply pipes 6a and 6b are respectively connected to the left and right connecting pipe interfaces 121 and 122 of the aforementioned water tank. Figure 3 also shows a left fire hose 7a and a right fire hose 7b. One end of the left and right fire hoses 7a and 7b are respectively connected to the left and right connecting ports 123 and 124 of the aforementioned quick-connect type external environmental water source hose, while the other end extends to the aforementioned natural water bodies such as rivers, ponds, and lakes for water intake. Based on the applicant's description of Figure 1 above, the main methods for selecting the water supply to the water pump, i.e., the method for drawing water into the valve body cavity 11, are as follows: First, the left and right switching valves 31 and 32 close the left and right connecting pipe interfaces 121 and 122 of the water tank, while opening the left and right connecting ports 123 and 124 of the external environmental water source, thus using external environmental water; second, the left and right switching valves 31 and 32 close the left and right connecting ports 123 and 124 of the external environmental water source, while opening the left and right connecting pipe interfaces 121 and 122 of the water tank, thus using water from the water tank; third, the left and right connecting pipe interfaces 121 and 122 of the water tank... One of the interfaces in 122 is closed while the other is open. Simultaneously, one of the interfaces in the left and right connection ports 123 and 124 of the external environmental water source hose is closed while the other is open. In this case, water is supplied simultaneously from the water tank through one of the aforementioned interfaces and through one connection port of the external environmental water source. Fourthly, the left and right fire hoses 7a and 7b are connected to two fire hydrants respectively. In this case, water from the two fire hydrants is simultaneously introduced into the valve body cavity 11 through the left and right connection ports 123 and 124 of the external environmental water source hose, for pumping 5 to extract and supply to fire hoses or fire monitors for fire extinguishing. The applicant should note that there are other possible forms of fire water selection, which will not be elaborated upon here.

[0034] The applicant will now provide a brief description of the control operation of the valve position pivoting mechanism 4 on the valve mechanism 3. This brief description refers to an explanation of a specific scenario. Since the operation of the right switching valve 32 by the manual operating device 42 on the upper support shaft of the right switching valve is similar to the operation of the left switching valve 31 by the manual operating device 41 on the upper support shaft of the left switching valve, the applicant chooses the latter, namely the operation of the left switching valve 31 by the manual operating device 41 on the upper support shaft of the left switching valve, to describe in detail. The firefighter holds the left operating handle 411 and the left locking handle 413 at the same time, and applies an upward force to the left end of the left locking handle 413, that is, applies a force to the side of the left operating handle 411 facing downward. At this time, with the aforementioned hinge pin 4131 of the left locking handle as the pivot point, the left end of the left locking handle 413 moves upward, and the left locking handle return spring 4132 is compressed and stores energy. At the same time, since the right end of the left locking handle 413 tilts downward, the aforementioned left limiting flange 4133 moves downward from the position of the left locking tooth groove 4143 of the left locking tooth plate 414 and releases its engagement with the left locking tooth groove 4143. At this time, if the firefighters turn the left operating handle 411 90° clockwise, the left operating sleeve 412 will also rotate 90° clockwise accordingly. The left operating sleeve 412 will drive the left switching valve upper support shaft 31111 through the left switching valve upper support shaft square head 31111, and thus the left switching valve 31 will be driven by the left switching valve upper support shaft arm plate 311 through the left switching valve upper support shaft arm plate 311. That is to say, since the left switching valve lower support shaft 3121 of the left switching valve 31 is rotatably supported on the left valve rotating support seat 112, the left switching valve 31 will switch from the previously closed position of the left connection port 123 of the external environment water source hose to the closed position of the left connection pipe interface 121 of the water tank, so that the left connection port 123 of the external environment water source hose is opened. The water used in this situation is the aforementioned external environment water, and vice versa, which will not be repeated. After the firefighters have completed the aforementioned operations, when they remove their hands from the left operating handle 411 and the left locking handle 413, the restoring force of the left locking handle return spring 4132 causes the aforementioned left limiting flange 4133 to return upward and align with the tooth groove 4143 of the left arc tooth plate, thereby preventing abnormal rotation of the left operating handle 411.

[0035] In summary, the technical solution provided by this invention makes up for the shortcomings of the prior art, successfully completes the invention task, and accurately realizes the technical effects described by the applicant in the above technical effects column.

Claims

1. A selectable water supply inlet valve structure, comprising a valve body (1), wherein a set of valve body inlet ports (12) communicating with a valve body cavity (11) and a valve body outlet port (13) are formed on the side of the valve body (1), the valve body outlet port (13) being connected to the water pump inlet port (51) of a water pump (5) in use; a valve cover (2), the valve cover (2) being sealed and fixed to the upper open position of the valve body (1); and a valve mechanism (3), the valve mechanism (3) being disposed in the valve body cavity (11), and The bottom of the valve mechanism (3) is pivotally supported on the bottom wall (111) of the valve body cavity (11). The middle part of the valve mechanism (3) is engaged with the side of the valve body inlet (12) facing the valve body cavity (11), while the top of the valve mechanism (3) is rotatably engaged with the valve cover (2) and extends above the valve cover (2). A valve position pivoting mechanism (4) is also present, which engages with the top of the valve mechanism (3) at a position corresponding to the top of the valve cover (2). The valve mechanism (3) is characterized by the following: The set of valve body water inlet ports (12) includes a water tank left connecting pipe port (121) on the left side of the valve body (1), a water tank right connecting pipe port (122) on the right side of the valve body (1), an external environment water source water hose left connecting port (123) on the front left side of the valve body (1), and an external environment water source water hose right connecting port (124) on the front right side of the valve body (1). The valve body water outlet port (13) is located in the center of the rear side of the valve body (1).

2. The selectable water inlet valve structure according to claim 1, characterized in that: A valve cover sealing ring groove (14) is formed on the upper open side surface of the valve body (1) and around the valve body (1). A valve cover sealing ring (141) is embedded in the valve cover sealing ring groove (14). Valve cover fixing screw holes (15) are also spaced apart around the outside of the valve cover sealing ring groove (14). A valve cover screw hole (21) is provided on the valve cover (2) at the position corresponding to the valve cover fixing screw hole (15). The valve cover screw (211) is screwed into the valve cover fixing screw hole (15) at the position corresponding to the valve cover screw hole (21) to fix the valve seat (2) to the upper open position of the valve body (1). The valve cover sealing ring (141) makes the lower edge of the valve cover (2) seal the upper open position of the valve body (1).

3. The selectable water inlet valve structure according to claim 1, characterized in that: A valve cover left shaft seat (22) is formed at the center of the left end of the valve cover (2), and a valve cover right shaft seat (23) is formed at the center of the right end of the valve cover (2); a left valve rotation support seat (112) is formed in the valve body cavity (11) of the valve body (1) at the junction of the left connection pipe interface (121) of the water tank and the left connection port (123) of the external environment water source facing the valve body cavity (11), and a right valve rotation support seat is formed at the junction of the right connection pipe interface (122) of the water tank and the right connection port (124) of the external environment water source facing the valve body cavity (11). (113), and the left valve cover seat (22) and the left valve rotating support seat (112) are on the same longitudinal axis, while the right valve cover seat (23) and the right valve rotating support seat (113) are on the same longitudinal axis; the valve mechanism (3) rotates with the left valve cover seat (22) and the left valve rotating support seat (112) and also rotates with the right valve cover seat (23) and the right valve rotating support seat (113); the valve position pivot switching mechanism (4) is positioned above the left valve cover seat (22) and the right valve cover seat (23) and engages with the top of the valve mechanism (3).

4. The selectable water inlet valve structure according to claim 1, characterized in that: A water tank left connecting pipe interface sealing ring (1211) is fixed in the water tank left connecting pipe interface (121) by screws; a water tank right connecting pipe interface sealing ring (1221) is fixed in the water tank right connecting pipe interface (122) by screws; an external environment water source water hose left connecting port sealing ring (1231) is fixed in the external environment water source water hose left connecting port (123) by screws; and an external environment water source water hose right connecting port sealing ring (1241) is fixed in the external environment water source water hose right connecting port (124) by screws.

5. The selectable water inlet valve structure according to claim 3, characterized in that: The valve mechanism (3) includes a left switching valve (31) and a right switching valve (32). A left switching valve upper support shaft arm plate (311) extends to the right from the top of the left switching valve (31). A left switching valve upper support shaft (3111) is fixed on the upward-facing side of the left switching valve upper support shaft arm plate (311). The lower end of the left switching valve upper support shaft (3111) is rotatably engaged with the left shaft seat (22) of the valve cover. The upper end of the left switching valve upper support shaft (3111) is configured as a left switching valve upper support shaft square head (31111), and the left switching valve upper support shaft square head (31111) extends to the left shaft of the valve cover. Above the seat (22), a left switching valve lower support shaft arm plate (312) extends to the right from the bottom of the left switching valve (31). A left switching valve lower support shaft (3121) is fixed on the downward-facing side of the left switching valve lower support shaft arm plate (312). The left switching valve lower support shaft (3121) is rotatably supported on the left valve rotating support seat (112). The left switching valve (31) rotates clockwise or counterclockwise between the left connection pipe interface (121) of the water tank and the left connection port (123) of the external environment water source hose. When it rotates to the point of contact and engagement with the left connection pipe interface (121) of the water tank, it allows water to flow. The left connecting pipe interface (121) of the tank is closed, while the left connecting port (123) of the external environment water source hose is opened. When the left switching valve (31) rotates to the point of contact with the left connecting port (123) of the external environment water source hose, it closes the left connecting port (123) of the external environment water source hose and opens the left connecting pipe interface (121) of the water tank. A right switching valve upper support shaft arm plate (321) extends to the left from the top of the right switching valve (32). A right switching valve upper support shaft (3211) is fixed on the upward-facing side of the right switching valve upper support shaft arm plate (3211). The lower end of the valve is rotatably engaged with the right shaft seat (23) of the valve cover, and the upper end of the upper support shaft (3211) of the right switching valve is configured as the square head (32111) of the upper support shaft of the right switching valve, and the square head (32111) of the upper support shaft of the right switching valve extends above the right shaft seat (23) of the valve cover. A lower support shaft arm plate (322) of the right switching valve extends to the left at the bottom of the right switching valve (32). A lower support shaft (3221) of the right switching valve is fixed on the downward side of the lower support shaft arm plate (322), and the lower support shaft (3221) of the right switching valve is rotatably supported on the right valve rotating support seat (113).The valve position pivoting switching mechanism (4) is positioned above the left valve cover bearing (22) and the right valve cover bearing (23) and engages with the left switching valve upper support shaft square head (31111) and the right switching valve upper support shaft square head (32111). The right switching valve (32) rotates clockwise or counterclockwise between the right connection pipe interface (122) of the water tank and the right connection port (124) of the external environment water source hose, and when it rotates to contact the right connection pipe interface (122) of the water tank... When the valve is in a coordinated state, it closes the right connection port (122) of the water tank while simultaneously opening the right connection port (124) of the external environmental water source hose. When the right switching valve (32) rotates to the point of contact with the right connection port (124) of the external environmental water source hose, it closes the right connection port (124) of the external environmental water source hose while simultaneously opening the right connection port (122) of the water tank. The opposite sides of the left switching valve (31) and the right switching valve (32) are each formed into an arc-shaped surface.

6. The selectable water inlet valve structure according to claim 5, characterized in that: A valve cover left shaft seat hole (221) is formed at the center of the valve cover left shaft seat (22) for the rotational engagement of the left switching valve upper support shaft (3111). A pair of left switching valve upper support shaft sealing rings (31112) are embedded on the left switching valve upper support shaft (3111), and the pair of left switching valve upper support shaft sealing rings (31112) are sealed in engagement with the hole wall of the valve cover left shaft seat hole (221). A valve cover right shaft seat hole (231) is formed at the center of the valve cover right shaft seat (23) for the rotational engagement of the right switching valve upper support shaft (3211). A pair of right switching valve upper support shaft sealing rings (32112) are embedded on the right switching valve upper support shaft (3211), and the pair of right switching valve upper support shaft sealing rings (32112) are sealed in engagement with the hole wall of the valve cover right shaft seat hole (231).

7. The selectable water inlet valve structure according to claim 5, characterized in that: The valve position pivoting switching mechanism (4) includes a manual operating device (41) for the upper support shaft of the left switching valve and a manual operating device (42) for the upper support shaft of the right switching valve. The manual operating device (41) for the upper support shaft of the left switching valve is positioned above the left shaft seat (22) of the valve cover and engages with the square head (31111) of the upper support shaft of the left switching valve. The manual operating device (42) for the upper support shaft of the right switching valve is positioned above the right shaft seat (23) of the valve cover and engages with the square head (32111) of the upper support shaft of the right switching valve.

8. The selectable water inlet valve structure according to claim 7, characterized in that: A pair of left arc-tooth plate fixing ears (222) are formed on the outer wall of the left shaft seat (22) of the valve cover. The pair of left arc-tooth plate fixing ears (222) are spaced 180° apart from each other in the circumferential direction around the left shaft seat (22) of the valve cover. The manual operating device (41) of the upper support shaft of the left switching valve includes a left operating handle (411), a left operating sleeve (412), a left locking handle (413) and a left arc-tooth plate (414). The left arc-tooth plate (414) is fixed to the left arc-tooth plate fixing ears (222) by a pair of left arc-tooth plate fixing screws. 2) The position is fixed to the left shaft seat (22) of the valve cover. A pair of left arc tooth plate stops (4141) are formed at the edge of the left arc tooth plate (414). The pair of left arc tooth plate stops (4141) are 180° apart from each other in the circumferential direction of the left arc tooth plate (414). A left arc tooth plate clearance hole (4142) is opened on the left arc tooth plate (414) at the position corresponding to the left shaft seat hole (221) of the valve seat. The square head (31111) of the upper support shaft of the left switching valve extends into the left arc tooth plate clearance hole (4142). Above the left operating sleeve (412), the left operating sleeve (412) is fixed to the right end of the left operating handle (411) facing downwards and cooperates with the square head (31111) of the support shaft on the left switching valve. The left end of the left operating handle (411) is configured as a manual operating grip end. The left locking handle (413) is located below the left operating handle (411). The right end of the left locking handle (413) is hinged to the left operating handle (411) through the left locking handle hinge pin (4131). A left locking handle return spring (41) is provided in the middle. 32) The lower end of the left locking handle return spring (4132) is supported on the left locking handle (413), while the upper end is supported on the side of the left operating handle (411) facing downwards. The left end of the left locking handle (413) is configured as a free end. A left limiting flange (4133) is formed on the front side of the left locking handle (413) and on the right side of the hinge pin (4131) of the left locking handle, which engages with or disengages from the tooth groove (4143) on the left arc tooth plate (414).

9. The selectable water inlet valve structure according to claim 7, characterized in that: A pair of right arc-tooth plate fixing ears (232) are formed on the outer wall of the right shaft seat (23) of the valve cover. The pair of right arc-tooth plate fixing ears (232) are spaced 180° apart from each other in the circumferential direction around the right shaft seat (23) of the valve cover. The manual operating device (42) of the upper support shaft of the right switching valve includes a right operating handle (421), a right operating sleeve (422), a right locking handle (423) and a right arc-tooth plate (424). The right arc-tooth plate (424) is connected by a pair of right arc-tooth plates. The arc-tooth plate fixing screw is fixed to the right shaft seat (23) of the valve cover at the position corresponding to the right arc-tooth plate fixing lug (232). A pair of right arc-tooth plate stops (4241) are formed at the edge of the right arc-tooth plate (424). The pair of right arc-tooth plate stops (4241) are spaced 180° apart from each other in the circumferential direction of the right arc-tooth plate (424). A right arc-tooth plate hole is formed on the right arc-tooth plate (424) at the position corresponding to the right shaft seat hole (231) of the valve cover. The right switch valve upper support shaft square head (32111) extends above the right arc-tooth plate clearance hole (4242), the right operating sleeve (422) is fixed to the left end of the right operating handle (421) facing downward and cooperates with the right switch valve upper support shaft square head (32111), the right end of the right operating handle (421) is configured as a manual operation grip end, and the right locking handle (423) is located on the right operating handle ( Below 421), the right end of the right locking handle (423) is hinged to the right operating handle (421) via the right locking handle hinge pin (4231). A right locking handle return spring (4232) is provided in the middle. The lower end of the right locking handle return spring (4232) is supported on the right locking handle (423), while the upper end is supported on the side of the right operating handle (421) facing downward. The right end of the right locking handle (423) is configured as a free end. A right limiting flange (4233) is formed on the front side of the right locking handle (423) and on the left side of the right locking handle hinge pin (4231), which engages with or disengages from the right arc tooth plate groove (4243) on the right arc tooth plate (424).

10. A fire truck, characterized in that: It is equipped with the water inlet valve structure as described in claims 1-9.

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